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hostap/wpa_supplicant/p2p_supplicant.c
Eduardo Abinader e5fdc05dce P2P: Remove unecessary sanity check for global p2p 
This check is already being done on wpas_p2p_deinit_iface.
Of course, it is assumed wpa_s is not deinit when reaches
that point as a matter of fact.

Signed-off-by: Eduardo Abinader <eduardo.abinader@openbossa.org>
2014-09-28 11:03:48 +03:00

7904 lines
218 KiB
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/*
* wpa_supplicant - P2P
* Copyright (c) 2009-2010, Atheros Communications
* Copyright (c) 2010-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_common.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "wps/wps_i.h"
#include "p2p/p2p.h"
#include "ap/hostapd.h"
#include "ap/ap_config.h"
#include "ap/sta_info.h"
#include "ap/ap_drv_ops.h"
#include "ap/wps_hostapd.h"
#include "ap/p2p_hostapd.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "ap.h"
#include "config_ssid.h"
#include "config.h"
#include "notify.h"
#include "scan.h"
#include "bss.h"
#include "offchannel.h"
#include "wps_supplicant.h"
#include "p2p_supplicant.h"
#include "wifi_display.h"
/*
* How many times to try to scan to find the GO before giving up on join
* request.
*/
#define P2P_MAX_JOIN_SCAN_ATTEMPTS 10
#define P2P_AUTO_PD_SCAN_ATTEMPTS 5
#ifndef P2P_MAX_CLIENT_IDLE
/*
* How many seconds to try to reconnect to the GO when connection in P2P client
* role has been lost.
*/
#define P2P_MAX_CLIENT_IDLE 10
#endif /* P2P_MAX_CLIENT_IDLE */
#ifndef P2P_MAX_INITIAL_CONN_WAIT
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* WPS provisioning step or after the re-invocation of a persistent group on a
* P2P Client.
*/
#define P2P_MAX_INITIAL_CONN_WAIT 10
#endif /* P2P_MAX_INITIAL_CONN_WAIT */
#ifndef P2P_MAX_INITIAL_CONN_WAIT_GO
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* WPS provisioning step on the GO. This controls the extra time the P2P
* operation is considered to be in progress (e.g., to delay other scans) after
* WPS provisioning has been completed on the GO during group formation.
*/
#define P2P_MAX_INITIAL_CONN_WAIT_GO 10
#endif /* P2P_MAX_INITIAL_CONN_WAIT_GO */
#ifndef P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* re-invocation of a persistent group on the GO when the client is expected
* to connect automatically (no user interaction).
*/
#define P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE 15
#endif /* P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE */
#define P2P_MGMT_DEVICE_PREFIX "p2p-dev-"
enum p2p_group_removal_reason {
P2P_GROUP_REMOVAL_UNKNOWN,
P2P_GROUP_REMOVAL_SILENT,
P2P_GROUP_REMOVAL_FORMATION_FAILED,
P2P_GROUP_REMOVAL_REQUESTED,
P2P_GROUP_REMOVAL_IDLE_TIMEOUT,
P2P_GROUP_REMOVAL_UNAVAILABLE,
P2P_GROUP_REMOVAL_GO_ENDING_SESSION,
P2P_GROUP_REMOVAL_PSK_FAILURE,
P2P_GROUP_REMOVAL_FREQ_CONFLICT
};
static void wpas_p2p_long_listen_timeout(void *eloop_ctx, void *timeout_ctx);
static struct wpa_supplicant *
wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated,
int go);
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s, int freq,
const u8 *ssid, size_t ssid_len);
static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq,
const u8 *ssid, size_t ssid_len);
static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx);
static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
const u8 *dev_addr, enum p2p_wps_method wps_method,
int auto_join, int freq,
const u8 *ssid, size_t ssid_len);
static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s);
static void wpas_p2p_cross_connect_setup(struct wpa_supplicant *wpa_s);
static void wpas_p2p_group_idle_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpas_p2p_set_group_idle_timeout(struct wpa_supplicant *wpa_s);
static void wpas_p2p_group_formation_timeout(void *eloop_ctx,
void *timeout_ctx);
static void wpas_p2p_group_freq_conflict(void *eloop_ctx, void *timeout_ctx);
static void wpas_p2p_fallback_to_go_neg(struct wpa_supplicant *wpa_s,
int group_added);
static int wpas_p2p_stop_find_oper(struct wpa_supplicant *wpa_s);
static void wpas_stop_listen(void *ctx);
static void wpas_p2p_psk_failure_removal(void *eloop_ctx, void *timeout_ctx);
static void wpas_p2p_group_deinit(struct wpa_supplicant *wpa_s);
/*
* Get the number of concurrent channels that the HW can operate, but that are
* currently not in use by any of the wpa_supplicant interfaces.
*/
static int wpas_p2p_num_unused_channels(struct wpa_supplicant *wpa_s)
{
int *freqs;
int num, unused;
freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int));
if (!freqs)
return -1;
num = get_shared_radio_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
os_free(freqs);
unused = wpa_s->num_multichan_concurrent - num;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: num_unused_channels: %d", unused);
return unused;
}
/*
* Get the frequencies that are currently in use by one or more of the virtual
* interfaces, and that are also valid for P2P operation.
*/
static unsigned int
wpas_p2p_valid_oper_freqs(struct wpa_supplicant *wpa_s,
struct wpa_used_freq_data *p2p_freqs,
unsigned int len)
{
struct wpa_used_freq_data *freqs;
unsigned int num, i, j;
freqs = os_calloc(wpa_s->num_multichan_concurrent,
sizeof(struct wpa_used_freq_data));
if (!freqs)
return 0;
num = get_shared_radio_freqs_data(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
os_memset(p2p_freqs, 0, sizeof(struct wpa_used_freq_data) * len);
for (i = 0, j = 0; i < num && j < len; i++) {
if (p2p_supported_freq(wpa_s->global->p2p, freqs[i].freq))
p2p_freqs[j++] = freqs[i];
}
os_free(freqs);
dump_freq_data(wpa_s, "valid for P2P", p2p_freqs, j);
return j;
}
static void wpas_p2p_set_own_freq_preference(struct wpa_supplicant *wpa_s,
int freq)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (wpa_s->parent->conf->p2p_ignore_shared_freq &&
freq > 0 && wpa_s->num_multichan_concurrent > 1 &&
wpas_p2p_num_unused_channels(wpa_s) > 0) {
wpa_printf(MSG_DEBUG, "P2P: Ignore own channel preference %d MHz due to p2p_ignore_shared_freq=1 configuration",
freq);
freq = 0;
}
p2p_set_own_freq_preference(wpa_s->global->p2p, freq);
}
static void wpas_p2p_scan_res_handler(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
size_t i;
if (wpa_s->p2p_scan_work) {
struct wpa_radio_work *work = wpa_s->p2p_scan_work;
wpa_s->p2p_scan_work = NULL;
radio_work_done(work);
}
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS)",
(int) scan_res->num);
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *bss = scan_res->res[i];
struct os_reltime time_tmp_age, entry_ts;
const u8 *ies;
size_t ies_len;
time_tmp_age.sec = bss->age / 1000;
time_tmp_age.usec = (bss->age % 1000) * 1000;
os_reltime_sub(&scan_res->fetch_time, &time_tmp_age, &entry_ts);
ies = (const u8 *) (bss + 1);
ies_len = bss->ie_len;
if (bss->beacon_ie_len > 0 &&
!wpa_scan_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
wpa_scan_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) {
wpa_printf(MSG_DEBUG, "P2P: Use P2P IE(s) from Beacon frame since no P2P IE(s) in Probe Response frames received for "
MACSTR, MAC2STR(bss->bssid));
ies = ies + ies_len;
ies_len = bss->beacon_ie_len;
}
if (p2p_scan_res_handler(wpa_s->global->p2p, bss->bssid,
bss->freq, &entry_ts, bss->level,
ies, ies_len) > 0)
break;
}
p2p_scan_res_handled(wpa_s->global->p2p);
}
static void wpas_p2p_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_supplicant *wpa_s = work->wpa_s;
struct wpa_driver_scan_params *params = work->ctx;
int ret;
if (deinit) {
if (!work->started) {
wpa_scan_free_params(params);
return;
}
wpa_s->p2p_scan_work = NULL;
return;
}
ret = wpa_drv_scan(wpa_s, params);
wpa_scan_free_params(params);
work->ctx = NULL;
if (ret) {
radio_work_done(work);
return;
}
os_get_reltime(&wpa_s->scan_trigger_time);
wpa_s->scan_res_handler = wpas_p2p_scan_res_handler;
wpa_s->own_scan_requested = 1;
wpa_s->p2p_scan_work = work;
}
static int wpas_p2p_scan(void *ctx, enum p2p_scan_type type, int freq,
unsigned int num_req_dev_types,
const u8 *req_dev_types, const u8 *dev_id, u16 pw_id)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_driver_scan_params *params = NULL;
struct wpabuf *wps_ie, *ies;
size_t ielen;
u8 *n;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
if (wpa_s->p2p_scan_work) {
wpa_dbg(wpa_s, MSG_INFO, "P2P: Reject scan trigger since one is already pending");
return -1;
}
params = os_zalloc(sizeof(*params));
if (params == NULL)
return -1;
/* P2P Wildcard SSID */
params->num_ssids = 1;
n = os_malloc(P2P_WILDCARD_SSID_LEN);
if (n == NULL)
goto fail;
os_memcpy(n, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
params->ssids[0].ssid = n;
params->ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN;
wpa_s->wps->dev.p2p = 1;
wps_ie = wps_build_probe_req_ie(pw_id, &wpa_s->wps->dev,
wpa_s->wps->uuid, WPS_REQ_ENROLLEE,
num_req_dev_types, req_dev_types);
if (wps_ie == NULL)
goto fail;
ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
ies = wpabuf_alloc(wpabuf_len(wps_ie) + ielen);
if (ies == NULL) {
wpabuf_free(wps_ie);
goto fail;
}
wpabuf_put_buf(ies, wps_ie);
wpabuf_free(wps_ie);
p2p_scan_ie(wpa_s->global->p2p, ies, dev_id);
params->p2p_probe = 1;
n = os_malloc(wpabuf_len(ies));
if (n == NULL) {
wpabuf_free(ies);
goto fail;
}
os_memcpy(n, wpabuf_head(ies), wpabuf_len(ies));
params->extra_ies = n;
params->extra_ies_len = wpabuf_len(ies);
wpabuf_free(ies);
switch (type) {
case P2P_SCAN_SOCIAL:
params->freqs = os_malloc(4 * sizeof(int));
if (params->freqs == NULL)
goto fail;
params->freqs[0] = 2412;
params->freqs[1] = 2437;
params->freqs[2] = 2462;
params->freqs[3] = 0;
break;
case P2P_SCAN_FULL:
break;
case P2P_SCAN_SOCIAL_PLUS_ONE:
params->freqs = os_malloc(5 * sizeof(int));
if (params->freqs == NULL)
goto fail;
params->freqs[0] = 2412;
params->freqs[1] = 2437;
params->freqs[2] = 2462;
params->freqs[3] = freq;
params->freqs[4] = 0;
break;
}
radio_remove_works(wpa_s, "p2p-scan", 0);
if (radio_add_work(wpa_s, 0, "p2p-scan", 0, wpas_p2p_trigger_scan_cb,
params) < 0)
goto fail;
return 0;
fail:
wpa_scan_free_params(params);
return -1;
}
static enum wpa_driver_if_type wpas_p2p_if_type(int p2p_group_interface)
{
switch (p2p_group_interface) {
case P2P_GROUP_INTERFACE_PENDING:
return WPA_IF_P2P_GROUP;
case P2P_GROUP_INTERFACE_GO:
return WPA_IF_P2P_GO;
case P2P_GROUP_INTERFACE_CLIENT:
return WPA_IF_P2P_CLIENT;
}
return WPA_IF_P2P_GROUP;
}
static struct wpa_supplicant * wpas_get_p2p_group(struct wpa_supplicant *wpa_s,
const u8 *ssid,
size_t ssid_len, int *go)
{
struct wpa_ssid *s;
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled != 0 || !s->p2p_group ||
s->ssid_len != ssid_len ||
os_memcmp(ssid, s->ssid, ssid_len) != 0)
continue;
if (s->mode == WPAS_MODE_P2P_GO &&
s != wpa_s->current_ssid)
continue;
if (go)
*go = s->mode == WPAS_MODE_P2P_GO;
return wpa_s;
}
}
return NULL;
}
static int wpas_p2p_group_delete(struct wpa_supplicant *wpa_s,
enum p2p_group_removal_reason removal_reason)
{
struct wpa_ssid *ssid;
char *gtype;
const char *reason;
ssid = wpa_s->current_ssid;
if (ssid == NULL) {
/*
* The current SSID was not known, but there may still be a
* pending P2P group interface waiting for provisioning or a
* P2P group that is trying to reconnect.
*/
ssid = wpa_s->conf->ssid;
while (ssid) {
if (ssid->p2p_group && ssid->disabled != 2)
break;
ssid = ssid->next;
}
if (ssid == NULL &&
wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE)
{
wpa_printf(MSG_ERROR, "P2P: P2P group interface "
"not found");
return -1;
}
}
if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO)
gtype = "GO";
else if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT ||
(ssid && ssid->mode == WPAS_MODE_INFRA)) {
wpa_s->reassociate = 0;
wpa_s->disconnected = 1;
gtype = "client";
} else
gtype = "GO";
if (removal_reason != P2P_GROUP_REMOVAL_SILENT && ssid)
wpas_notify_p2p_group_removed(wpa_s, ssid, gtype);
if (os_strcmp(gtype, "client") == 0)
wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
if (wpa_s->cross_connect_in_use) {
wpa_s->cross_connect_in_use = 0;
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s",
wpa_s->ifname, wpa_s->cross_connect_uplink);
}
switch (removal_reason) {
case P2P_GROUP_REMOVAL_REQUESTED:
reason = " reason=REQUESTED";
break;
case P2P_GROUP_REMOVAL_FORMATION_FAILED:
reason = " reason=FORMATION_FAILED";
break;
case P2P_GROUP_REMOVAL_IDLE_TIMEOUT:
reason = " reason=IDLE";
break;
case P2P_GROUP_REMOVAL_UNAVAILABLE:
reason = " reason=UNAVAILABLE";
break;
case P2P_GROUP_REMOVAL_GO_ENDING_SESSION:
reason = " reason=GO_ENDING_SESSION";
break;
case P2P_GROUP_REMOVAL_PSK_FAILURE:
reason = " reason=PSK_FAILURE";
break;
case P2P_GROUP_REMOVAL_FREQ_CONFLICT:
reason = " reason=FREQ_CONFLICT";
break;
default:
reason = "";
break;
}
if (removal_reason != P2P_GROUP_REMOVAL_SILENT) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_REMOVED "%s %s%s",
wpa_s->ifname, gtype, reason);
}
if (eloop_cancel_timeout(wpas_p2p_group_freq_conflict, wpa_s, NULL) > 0)
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group freq_conflict timeout");
if (eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0)
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout");
if (eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL) > 0) {
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group formation "
"timeout");
wpa_s->p2p_in_provisioning = 0;
}
wpa_s->p2p_in_invitation = 0;
/*
* Make sure wait for the first client does not remain active after the
* group has been removed.
*/
wpa_s->global->p2p_go_wait_client.sec = 0;
if (wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) {
struct wpa_global *global;
char *ifname;
enum wpa_driver_if_type type;
wpa_printf(MSG_DEBUG, "P2P: Remove group interface %s",
wpa_s->ifname);
global = wpa_s->global;
ifname = os_strdup(wpa_s->ifname);
type = wpas_p2p_if_type(wpa_s->p2p_group_interface);
wpa_supplicant_remove_iface(wpa_s->global, wpa_s, 0);
wpa_s = global->ifaces;
if (wpa_s && ifname)
wpa_drv_if_remove(wpa_s, type, ifname);
os_free(ifname);
return 1;
}
if (!wpa_s->p2p_go_group_formation_completed) {
wpa_s->global->p2p_group_formation = NULL;
wpa_s->p2p_in_provisioning = 0;
}
wpa_s->show_group_started = 0;
os_free(wpa_s->go_params);
wpa_s->go_params = NULL;
wpa_s->waiting_presence_resp = 0;
wpa_printf(MSG_DEBUG, "P2P: Remove temporary group network");
if (ssid && (ssid->p2p_group ||
ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION ||
(ssid->key_mgmt & WPA_KEY_MGMT_WPS))) {
int id = ssid->id;
if (ssid == wpa_s->current_ssid) {
wpa_sm_set_config(wpa_s->wpa, NULL);
eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
wpa_s->current_ssid = NULL;
}
/*
* Networks objects created during any P2P activities are not
* exposed out as they might/will confuse certain non-P2P aware
* applications since these network objects won't behave like
* regular ones.
*
* Likewise, we don't send out network removed signals for such
* network objects.
*/
wpa_config_remove_network(wpa_s->conf, id);
wpa_supplicant_clear_status(wpa_s);
wpa_supplicant_cancel_sched_scan(wpa_s);
} else {
wpa_printf(MSG_DEBUG, "P2P: Temporary group network not "
"found");
}
if (wpa_s->ap_iface)
wpa_supplicant_ap_deinit(wpa_s);
else
wpa_drv_deinit_p2p_cli(wpa_s);
return 0;
}
static int wpas_p2p_persistent_group(struct wpa_supplicant *wpa_s,
u8 *go_dev_addr,
const u8 *ssid, size_t ssid_len)
{
struct wpa_bss *bss;
const u8 *bssid;
struct wpabuf *p2p;
u8 group_capab;
const u8 *addr;
if (wpa_s->go_params)
bssid = wpa_s->go_params->peer_interface_addr;
else
bssid = wpa_s->bssid;
bss = wpa_bss_get(wpa_s, bssid, ssid, ssid_len);
if (bss == NULL && wpa_s->go_params &&
!is_zero_ether_addr(wpa_s->go_params->peer_device_addr))
bss = wpa_bss_get_p2p_dev_addr(
wpa_s, wpa_s->go_params->peer_device_addr);
if (bss == NULL) {
u8 iface_addr[ETH_ALEN];
if (p2p_get_interface_addr(wpa_s->global->p2p, bssid,
iface_addr) == 0)
bss = wpa_bss_get(wpa_s, iface_addr, ssid, ssid_len);
}
if (bss == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether "
"group is persistent - BSS " MACSTR " not found",
MAC2STR(bssid));
return 0;
}
p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
if (p2p == NULL)
p2p = wpa_bss_get_vendor_ie_multi_beacon(bss,
P2P_IE_VENDOR_TYPE);
if (p2p == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether "
"group is persistent - BSS " MACSTR
" did not include P2P IE", MAC2STR(bssid));
wpa_hexdump(MSG_DEBUG, "P2P: Probe Response IEs",
(u8 *) (bss + 1), bss->ie_len);
wpa_hexdump(MSG_DEBUG, "P2P: Beacon IEs",
((u8 *) bss + 1) + bss->ie_len,
bss->beacon_ie_len);
return 0;
}
group_capab = p2p_get_group_capab(p2p);
addr = p2p_get_go_dev_addr(p2p);
wpa_printf(MSG_DEBUG, "P2P: Checking whether group is persistent: "
"group_capab=0x%x", group_capab);
if (addr) {
os_memcpy(go_dev_addr, addr, ETH_ALEN);
wpa_printf(MSG_DEBUG, "P2P: GO Device Address " MACSTR,
MAC2STR(addr));
} else
os_memset(go_dev_addr, 0, ETH_ALEN);
wpabuf_free(p2p);
wpa_printf(MSG_DEBUG, "P2P: BSS " MACSTR " group_capab=0x%x "
"go_dev_addr=" MACSTR,
MAC2STR(bssid), group_capab, MAC2STR(go_dev_addr));
return group_capab & P2P_GROUP_CAPAB_PERSISTENT_GROUP;
}
static int wpas_p2p_store_persistent_group(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const u8 *go_dev_addr)
{
struct wpa_ssid *s;
int changed = 0;
wpa_printf(MSG_DEBUG, "P2P: Storing credentials for a persistent "
"group (GO Dev Addr " MACSTR ")", MAC2STR(go_dev_addr));
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled == 2 &&
os_memcmp(go_dev_addr, s->bssid, ETH_ALEN) == 0 &&
s->ssid_len == ssid->ssid_len &&
os_memcmp(ssid->ssid, s->ssid, ssid->ssid_len) == 0)
break;
}
if (s) {
wpa_printf(MSG_DEBUG, "P2P: Update existing persistent group "
"entry");
if (ssid->passphrase && !s->passphrase)
changed = 1;
else if (ssid->passphrase && s->passphrase &&
os_strcmp(ssid->passphrase, s->passphrase) != 0)
changed = 1;
} else {
wpa_printf(MSG_DEBUG, "P2P: Create a new persistent group "
"entry");
changed = 1;
s = wpa_config_add_network(wpa_s->conf);
if (s == NULL)
return -1;
/*
* Instead of network_added we emit persistent_group_added
* notification. Also to keep the defense checks in
* persistent_group obj registration method, we set the
* relevant flags in s to designate it as a persistent group.
*/
s->p2p_group = 1;
s->p2p_persistent_group = 1;
wpas_notify_persistent_group_added(wpa_s, s);
wpa_config_set_network_defaults(s);
}
s->p2p_group = 1;
s->p2p_persistent_group = 1;
s->disabled = 2;
s->bssid_set = 1;
os_memcpy(s->bssid, go_dev_addr, ETH_ALEN);
s->mode = ssid->mode;
s->auth_alg = WPA_AUTH_ALG_OPEN;
s->key_mgmt = WPA_KEY_MGMT_PSK;
s->proto = WPA_PROTO_RSN;
s->pairwise_cipher = WPA_CIPHER_CCMP;
s->export_keys = 1;
if (ssid->passphrase) {
os_free(s->passphrase);
s->passphrase = os_strdup(ssid->passphrase);
}
if (ssid->psk_set) {
s->psk_set = 1;
os_memcpy(s->psk, ssid->psk, 32);
}
if (s->passphrase && !s->psk_set)
wpa_config_update_psk(s);
if (s->ssid == NULL || s->ssid_len < ssid->ssid_len) {
os_free(s->ssid);
s->ssid = os_malloc(ssid->ssid_len);
}
if (s->ssid) {
s->ssid_len = ssid->ssid_len;
os_memcpy(s->ssid, ssid->ssid, s->ssid_len);
}
if (ssid->mode == WPAS_MODE_P2P_GO && wpa_s->global->add_psk) {
dl_list_add(&s->psk_list, &wpa_s->global->add_psk->list);
wpa_s->global->add_psk = NULL;
changed = 1;
}
if (changed && wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
}
return s->id;
}
static void wpas_p2p_add_persistent_group_client(struct wpa_supplicant *wpa_s,
const u8 *addr)
{
struct wpa_ssid *ssid, *s;
u8 *n;
size_t i;
int found = 0;
ssid = wpa_s->current_ssid;
if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GO ||
!ssid->p2p_persistent_group)
return;
for (s = wpa_s->parent->conf->ssid; s; s = s->next) {
if (s->disabled != 2 || s->mode != WPAS_MODE_P2P_GO)
continue;
if (s->ssid_len == ssid->ssid_len &&
os_memcmp(s->ssid, ssid->ssid, s->ssid_len) == 0)
break;
}
if (s == NULL)
return;
for (i = 0; s->p2p_client_list && i < s->num_p2p_clients; i++) {
if (os_memcmp(s->p2p_client_list + i * ETH_ALEN, addr,
ETH_ALEN) != 0)
continue;
if (i == s->num_p2p_clients - 1)
return; /* already the most recent entry */
/* move the entry to mark it most recent */
os_memmove(s->p2p_client_list + i * ETH_ALEN,
s->p2p_client_list + (i + 1) * ETH_ALEN,
(s->num_p2p_clients - i - 1) * ETH_ALEN);
os_memcpy(s->p2p_client_list +
(s->num_p2p_clients - 1) * ETH_ALEN, addr, ETH_ALEN);
found = 1;
break;
}
if (!found && s->num_p2p_clients < P2P_MAX_STORED_CLIENTS) {
n = os_realloc_array(s->p2p_client_list,
s->num_p2p_clients + 1, ETH_ALEN);
if (n == NULL)
return;
os_memcpy(n + s->num_p2p_clients * ETH_ALEN, addr, ETH_ALEN);
s->p2p_client_list = n;
s->num_p2p_clients++;
} else if (!found && s->p2p_client_list) {
/* Not enough room for an additional entry - drop the oldest
* entry */
os_memmove(s->p2p_client_list,
s->p2p_client_list + ETH_ALEN,
(s->num_p2p_clients - 1) * ETH_ALEN);
os_memcpy(s->p2p_client_list +
(s->num_p2p_clients - 1) * ETH_ALEN,
addr, ETH_ALEN);
}
if (wpa_s->parent->conf->update_config &&
wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf))
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
}
static void wpas_p2p_group_started(struct wpa_supplicant *wpa_s,
int go, struct wpa_ssid *ssid, int freq,
const u8 *psk, const char *passphrase,
const u8 *go_dev_addr, int persistent,
const char *extra)
{
const char *ssid_txt;
char psk_txt[65];
if (psk)
wpa_snprintf_hex(psk_txt, sizeof(psk_txt), psk, 32);
else
psk_txt[0] = '\0';
if (ssid)
ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len);
else
ssid_txt = "";
if (passphrase && passphrase[0] == '\0')
passphrase = NULL;
/*
* Include PSK/passphrase only in the control interface message and
* leave it out from the debug log entry.
*/
wpa_msg_global_ctrl(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_STARTED
"%s %s ssid=\"%s\" freq=%d%s%s%s%s%s go_dev_addr="
MACSTR "%s%s",
wpa_s->ifname, go ? "GO" : "client", ssid_txt, freq,
psk ? " psk=" : "", psk_txt,
passphrase ? " passphrase=\"" : "",
passphrase ? passphrase : "",
passphrase ? "\"" : "",
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "", extra);
wpa_printf(MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s %s ssid=\"%s\" freq=%d go_dev_addr=" MACSTR "%s%s",
wpa_s->ifname, go ? "GO" : "client", ssid_txt, freq,
MAC2STR(go_dev_addr), persistent ? " [PERSISTENT]" : "",
extra);
}
static void wpas_group_formation_completed(struct wpa_supplicant *wpa_s,
int success)
{
struct wpa_ssid *ssid;
int client;
int persistent;
u8 go_dev_addr[ETH_ALEN];
int network_id = -1;
/*
* This callback is likely called for the main interface. Update wpa_s
* to use the group interface if a new interface was created for the
* group.
*/
if (wpa_s->global->p2p_group_formation)
wpa_s = wpa_s->global->p2p_group_formation;
if (wpa_s->p2p_go_group_formation_completed) {
wpa_s->global->p2p_group_formation = NULL;
wpa_s->p2p_in_provisioning = 0;
}
wpa_s->p2p_in_invitation = 0;
if (!success) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_FAILURE);
wpas_p2p_group_delete(wpa_s,
P2P_GROUP_REMOVAL_FORMATION_FAILED);
return;
}
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_SUCCESS);
ssid = wpa_s->current_ssid;
if (ssid && ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
ssid->mode = WPAS_MODE_P2P_GO;
p2p_group_notif_formation_done(wpa_s->p2p_group);
wpa_supplicant_ap_mac_addr_filter(wpa_s, NULL);
}
persistent = 0;
if (ssid) {
client = ssid->mode == WPAS_MODE_INFRA;
if (ssid->mode == WPAS_MODE_P2P_GO) {
persistent = ssid->p2p_persistent_group;
os_memcpy(go_dev_addr, wpa_s->global->p2p_dev_addr,
ETH_ALEN);
} else
persistent = wpas_p2p_persistent_group(wpa_s,
go_dev_addr,
ssid->ssid,
ssid->ssid_len);
} else {
client = wpa_s->p2p_group_interface ==
P2P_GROUP_INTERFACE_CLIENT;
os_memset(go_dev_addr, 0, ETH_ALEN);
}
wpa_s->show_group_started = 0;
if (client) {
/*
* Indicate event only after successfully completed 4-way
* handshake, i.e., when the interface is ready for data
* packets.
*/
wpa_s->show_group_started = 1;
} else {
wpas_p2p_group_started(wpa_s, 1, ssid,
ssid ? ssid->frequency : 0,
ssid && ssid->passphrase == NULL &&
ssid->psk_set ? ssid->psk : NULL,
ssid ? ssid->passphrase : NULL,
go_dev_addr, persistent, "");
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
}
if (persistent)
network_id = wpas_p2p_store_persistent_group(wpa_s->parent,
ssid, go_dev_addr);
else {
os_free(wpa_s->global->add_psk);
wpa_s->global->add_psk = NULL;
}
if (network_id < 0 && ssid)
network_id = ssid->id;
if (!client) {
wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0);
os_get_reltime(&wpa_s->global->p2p_go_wait_client);
}
}
struct send_action_work {
unsigned int freq;
u8 dst[ETH_ALEN];
u8 src[ETH_ALEN];
u8 bssid[ETH_ALEN];
size_t len;
unsigned int wait_time;
u8 buf[0];
};
static void wpas_p2p_send_action_work_timeout(void *eloop_ctx,
void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (!wpa_s->p2p_send_action_work)
return;
wpa_printf(MSG_DEBUG, "P2P: Send Action frame radio work timed out");
os_free(wpa_s->p2p_send_action_work->ctx);
radio_work_done(wpa_s->p2p_send_action_work);
wpa_s->p2p_send_action_work = NULL;
}
static void wpas_p2p_action_tx_clear(struct wpa_supplicant *wpa_s)
{
if (wpa_s->p2p_send_action_work) {
struct send_action_work *awork;
awork = wpa_s->p2p_send_action_work->ctx;
if (awork->wait_time == 0) {
os_free(awork);
radio_work_done(wpa_s->p2p_send_action_work);
wpa_s->p2p_send_action_work = NULL;
} else {
/*
* In theory, this should not be needed, but number of
* places in the P2P code is still using non-zero wait
* time for the last Action frame in the sequence and
* some of these do not call send_action_done().
*/
eloop_cancel_timeout(wpas_p2p_send_action_work_timeout,
wpa_s, NULL);
eloop_register_timeout(
0, awork->wait_time * 1000,
wpas_p2p_send_action_work_timeout,
wpa_s, NULL);
}
}
}
static void wpas_p2p_send_action_tx_status(struct wpa_supplicant *wpa_s,
unsigned int freq,
const u8 *dst, const u8 *src,
const u8 *bssid,
const u8 *data, size_t data_len,
enum offchannel_send_action_result
result)
{
enum p2p_send_action_result res = P2P_SEND_ACTION_SUCCESS;
wpas_p2p_action_tx_clear(wpa_s);
if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled)
return;
switch (result) {
case OFFCHANNEL_SEND_ACTION_SUCCESS:
res = P2P_SEND_ACTION_SUCCESS;
break;
case OFFCHANNEL_SEND_ACTION_NO_ACK:
res = P2P_SEND_ACTION_NO_ACK;
break;
case OFFCHANNEL_SEND_ACTION_FAILED:
res = P2P_SEND_ACTION_FAILED;
break;
}
p2p_send_action_cb(wpa_s->global->p2p, freq, dst, src, bssid, res);
if (result != OFFCHANNEL_SEND_ACTION_SUCCESS &&
wpa_s->pending_pd_before_join &&
(os_memcmp(dst, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 ||
os_memcmp(dst, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0) &&
wpa_s->p2p_fallback_to_go_neg) {
wpa_s->pending_pd_before_join = 0;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No ACK for PD Req "
"during p2p_connect-auto");
wpas_p2p_fallback_to_go_neg(wpa_s, 0);
return;
}
}
static void wpas_send_action_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_supplicant *wpa_s = work->wpa_s;
struct send_action_work *awork = work->ctx;
if (deinit) {
if (work->started) {
eloop_cancel_timeout(wpas_p2p_send_action_work_timeout,
wpa_s, NULL);
wpa_s->p2p_send_action_work = NULL;
offchannel_send_action_done(wpa_s);
}
os_free(awork);
return;
}
if (offchannel_send_action(wpa_s, awork->freq, awork->dst, awork->src,
awork->bssid, awork->buf, awork->len,
awork->wait_time,
wpas_p2p_send_action_tx_status, 1) < 0) {
os_free(awork);
radio_work_done(work);
return;
}
wpa_s->p2p_send_action_work = work;
}
static int wpas_send_action_work(struct wpa_supplicant *wpa_s,
unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid, const u8 *buf,
size_t len, unsigned int wait_time)
{
struct send_action_work *awork;
if (wpa_s->p2p_send_action_work) {
wpa_printf(MSG_DEBUG, "P2P: Cannot schedule new p2p-send-action work since one is already pending");
return -1;
}
awork = os_zalloc(sizeof(*awork) + len);
if (awork == NULL)
return -1;
awork->freq = freq;
os_memcpy(awork->dst, dst, ETH_ALEN);
os_memcpy(awork->src, src, ETH_ALEN);
os_memcpy(awork->bssid, bssid, ETH_ALEN);
awork->len = len;
awork->wait_time = wait_time;
os_memcpy(awork->buf, buf, len);
if (radio_add_work(wpa_s, freq, "p2p-send-action", 0,
wpas_send_action_cb, awork) < 0) {
os_free(awork);
return -1;
}
return 0;
}
static int wpas_send_action(void *ctx, unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid, const u8 *buf,
size_t len, unsigned int wait_time)
{
struct wpa_supplicant *wpa_s = ctx;
int listen_freq = -1, send_freq = -1;
if (wpa_s->p2p_listen_work)
listen_freq = wpa_s->p2p_listen_work->freq;
if (wpa_s->p2p_send_action_work)
send_freq = wpa_s->p2p_send_action_work->freq;
if (listen_freq != (int) freq && send_freq != (int) freq) {
wpa_printf(MSG_DEBUG, "P2P: Schedule new radio work for Action frame TX (listen_freq=%d send_freq=%d)",
listen_freq, send_freq);
return wpas_send_action_work(wpa_s, freq, dst, src, bssid, buf,
len, wait_time);
}
wpa_printf(MSG_DEBUG, "P2P: Use ongoing radio work for Action frame TX");
return offchannel_send_action(wpa_s, freq, dst, src, bssid, buf, len,
wait_time,
wpas_p2p_send_action_tx_status, 1);
}
static void wpas_send_action_done(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->p2p_send_action_work) {
eloop_cancel_timeout(wpas_p2p_send_action_work_timeout,
wpa_s, NULL);
os_free(wpa_s->p2p_send_action_work->ctx);
radio_work_done(wpa_s->p2p_send_action_work);
wpa_s->p2p_send_action_work = NULL;
}
offchannel_send_action_done(wpa_s);
}
static int wpas_copy_go_neg_results(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params)
{
if (wpa_s->go_params == NULL) {
wpa_s->go_params = os_malloc(sizeof(*params));
if (wpa_s->go_params == NULL)
return -1;
}
os_memcpy(wpa_s->go_params, params, sizeof(*params));
return 0;
}
static void wpas_start_wps_enrollee(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *res)
{
wpa_printf(MSG_DEBUG, "P2P: Start WPS Enrollee for peer " MACSTR
" dev_addr " MACSTR " wps_method %d",
MAC2STR(res->peer_interface_addr),
MAC2STR(res->peer_device_addr), res->wps_method);
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Start WPS Enrollee for SSID",
res->ssid, res->ssid_len);
wpa_supplicant_ap_deinit(wpa_s);
wpas_copy_go_neg_results(wpa_s, res);
if (res->wps_method == WPS_PBC) {
wpas_wps_start_pbc(wpa_s, res->peer_interface_addr, 1);
#ifdef CONFIG_WPS_NFC
} else if (res->wps_method == WPS_NFC) {
wpas_wps_start_nfc(wpa_s, res->peer_device_addr,
res->peer_interface_addr,
wpa_s->parent->p2p_oob_dev_pw,
wpa_s->parent->p2p_oob_dev_pw_id, 1,
wpa_s->parent->p2p_oob_dev_pw_id ==
DEV_PW_NFC_CONNECTION_HANDOVER ?
wpa_s->parent->p2p_peer_oob_pubkey_hash :
NULL,
NULL, 0, 0);
#endif /* CONFIG_WPS_NFC */
} else {
u16 dev_pw_id = DEV_PW_DEFAULT;
if (wpa_s->p2p_wps_method == WPS_PIN_KEYPAD)
dev_pw_id = DEV_PW_REGISTRAR_SPECIFIED;
wpas_wps_start_pin(wpa_s, res->peer_interface_addr,
wpa_s->p2p_pin, 1, dev_pw_id);
}
}
static void wpas_p2p_add_psk_list(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
struct wpa_ssid *persistent;
struct psk_list_entry *psk;
struct hostapd_data *hapd;
if (!wpa_s->ap_iface)
return;
persistent = wpas_p2p_get_persistent(wpa_s->parent, NULL, ssid->ssid,
ssid->ssid_len);
if (persistent == NULL)
return;
hapd = wpa_s->ap_iface->bss[0];
dl_list_for_each(psk, &persistent->psk_list, struct psk_list_entry,
list) {
struct hostapd_wpa_psk *hpsk;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add persistent group PSK entry for "
MACSTR " psk=%d",
MAC2STR(psk->addr), psk->p2p);
hpsk = os_zalloc(sizeof(*hpsk));
if (hpsk == NULL)
break;
os_memcpy(hpsk->psk, psk->psk, PMK_LEN);
if (psk->p2p)
os_memcpy(hpsk->p2p_dev_addr, psk->addr, ETH_ALEN);
else
os_memcpy(hpsk->addr, psk->addr, ETH_ALEN);
hpsk->next = hapd->conf->ssid.wpa_psk;
hapd->conf->ssid.wpa_psk = hpsk;
}
}
static void p2p_go_configured(void *ctx, void *data)
{
struct wpa_supplicant *wpa_s = ctx;
struct p2p_go_neg_results *params = data;
struct wpa_ssid *ssid;
int network_id = -1;
ssid = wpa_s->current_ssid;
if (ssid && ssid->mode == WPAS_MODE_P2P_GO) {
wpa_printf(MSG_DEBUG, "P2P: Group setup without provisioning");
if (wpa_s->global->p2p_group_formation == wpa_s)
wpa_s->global->p2p_group_formation = NULL;
wpas_p2p_group_started(wpa_s, 1, ssid, ssid->frequency,
params->passphrase[0] == '\0' ?
params->psk : NULL,
params->passphrase,
wpa_s->global->p2p_dev_addr,
params->persistent_group, "");
os_get_reltime(&wpa_s->global->p2p_go_wait_client);
if (params->persistent_group) {
network_id = wpas_p2p_store_persistent_group(
wpa_s->parent, ssid,
wpa_s->global->p2p_dev_addr);
wpas_p2p_add_psk_list(wpa_s, ssid);
}
if (network_id < 0)
network_id = ssid->id;
wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0);
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
if (wpa_s->p2p_first_connection_timeout) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Start group formation timeout of %d seconds until first data connection on GO",
wpa_s->p2p_first_connection_timeout);
wpa_s->p2p_go_group_formation_completed = 0;
wpa_s->global->p2p_group_formation = wpa_s;
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
eloop_register_timeout(
wpa_s->p2p_first_connection_timeout, 0,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
return;
}
wpa_printf(MSG_DEBUG, "P2P: Setting up WPS for GO provisioning");
if (wpa_supplicant_ap_mac_addr_filter(wpa_s,
params->peer_interface_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to setup MAC address "
"filtering");
return;
}
if (params->wps_method == WPS_PBC) {
wpa_supplicant_ap_wps_pbc(wpa_s, params->peer_interface_addr,
params->peer_device_addr);
#ifdef CONFIG_WPS_NFC
} else if (params->wps_method == WPS_NFC) {
if (wpa_s->parent->p2p_oob_dev_pw_id !=
DEV_PW_NFC_CONNECTION_HANDOVER &&
!wpa_s->parent->p2p_oob_dev_pw) {
wpa_printf(MSG_DEBUG, "P2P: No NFC Dev Pw known");
return;
}
wpas_ap_wps_add_nfc_pw(
wpa_s, wpa_s->parent->p2p_oob_dev_pw_id,
wpa_s->parent->p2p_oob_dev_pw,
wpa_s->parent->p2p_peer_oob_pk_hash_known ?
wpa_s->parent->p2p_peer_oob_pubkey_hash : NULL);
#endif /* CONFIG_WPS_NFC */
} else if (wpa_s->p2p_pin[0])
wpa_supplicant_ap_wps_pin(wpa_s, params->peer_interface_addr,
wpa_s->p2p_pin, NULL, 0, 0);
os_free(wpa_s->go_params);
wpa_s->go_params = NULL;
}
static void wpas_start_wps_go(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params,
int group_formation)
{
struct wpa_ssid *ssid;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Starting GO");
if (wpas_copy_go_neg_results(wpa_s, params) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not copy GO Negotiation "
"results");
return;
}
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not add network for GO");
return;
}
wpa_s->show_group_started = 0;
wpa_config_set_network_defaults(ssid);
ssid->temporary = 1;
ssid->p2p_group = 1;
ssid->p2p_persistent_group = params->persistent_group;
ssid->mode = group_formation ? WPAS_MODE_P2P_GROUP_FORMATION :
WPAS_MODE_P2P_GO;
ssid->frequency = params->freq;
ssid->ht40 = params->ht40;
ssid->vht = params->vht;
ssid->ssid = os_zalloc(params->ssid_len + 1);
if (ssid->ssid) {
os_memcpy(ssid->ssid, params->ssid, params->ssid_len);
ssid->ssid_len = params->ssid_len;
}
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_RSN;
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
if (os_strlen(params->passphrase) > 0) {
ssid->passphrase = os_strdup(params->passphrase);
if (ssid->passphrase == NULL) {
wpa_msg_global(wpa_s, MSG_ERROR,
"P2P: Failed to copy passphrase for GO");
wpa_config_remove_network(wpa_s->conf, ssid->id);
return;
}
} else
ssid->passphrase = NULL;
ssid->psk_set = params->psk_set;
if (ssid->psk_set)
os_memcpy(ssid->psk, params->psk, sizeof(ssid->psk));
else if (ssid->passphrase)
wpa_config_update_psk(ssid);
ssid->ap_max_inactivity = wpa_s->parent->conf->p2p_go_max_inactivity;
wpa_s->ap_configured_cb = p2p_go_configured;
wpa_s->ap_configured_cb_ctx = wpa_s;
wpa_s->ap_configured_cb_data = wpa_s->go_params;
wpa_s->scan_req = NORMAL_SCAN_REQ;
wpa_s->connect_without_scan = ssid;
wpa_s->reassociate = 1;
wpa_s->disconnected = 0;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Request scan (that will be skipped) to "
"start GO)");
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
static void wpas_p2p_clone_config(struct wpa_supplicant *dst,
const struct wpa_supplicant *src)
{
struct wpa_config *d;
const struct wpa_config *s;
d = dst->conf;
s = src->conf;
#define C(n) if (s->n) d->n = os_strdup(s->n)
C(device_name);
C(manufacturer);
C(model_name);
C(model_number);
C(serial_number);
C(config_methods);
#undef C
os_memcpy(d->device_type, s->device_type, WPS_DEV_TYPE_LEN);
os_memcpy(d->sec_device_type, s->sec_device_type,
sizeof(d->sec_device_type));
d->num_sec_device_types = s->num_sec_device_types;
d->p2p_group_idle = s->p2p_group_idle;
d->p2p_intra_bss = s->p2p_intra_bss;
d->persistent_reconnect = s->persistent_reconnect;
d->max_num_sta = s->max_num_sta;
d->pbc_in_m1 = s->pbc_in_m1;
d->ignore_old_scan_res = s->ignore_old_scan_res;
d->beacon_int = s->beacon_int;
d->dtim_period = s->dtim_period;
d->disassoc_low_ack = s->disassoc_low_ack;
d->disable_scan_offload = s->disable_scan_offload;
if (s->wps_nfc_dh_privkey && s->wps_nfc_dh_pubkey) {
d->wps_nfc_dh_privkey = wpabuf_dup(s->wps_nfc_dh_privkey);
d->wps_nfc_dh_pubkey = wpabuf_dup(s->wps_nfc_dh_pubkey);
}
}
static void wpas_p2p_get_group_ifname(struct wpa_supplicant *wpa_s,
char *ifname, size_t len)
{
char *ifname_ptr = wpa_s->ifname;
if (os_strncmp(wpa_s->ifname, P2P_MGMT_DEVICE_PREFIX,
os_strlen(P2P_MGMT_DEVICE_PREFIX)) == 0) {
ifname_ptr = os_strrchr(wpa_s->ifname, '-') + 1;
}
os_snprintf(ifname, len, "p2p-%s-%d", ifname_ptr, wpa_s->p2p_group_idx);
if (os_strlen(ifname) >= IFNAMSIZ &&
os_strlen(wpa_s->ifname) < IFNAMSIZ) {
/* Try to avoid going over the IFNAMSIZ length limit */
os_snprintf(ifname, len, "p2p-%d", wpa_s->p2p_group_idx);
}
}
static int wpas_p2p_add_group_interface(struct wpa_supplicant *wpa_s,
enum wpa_driver_if_type type)
{
char ifname[120], force_ifname[120];
if (wpa_s->pending_interface_name[0]) {
wpa_printf(MSG_DEBUG, "P2P: Pending virtual interface exists "
"- skip creation of a new one");
if (is_zero_ether_addr(wpa_s->pending_interface_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Pending virtual address "
"unknown?! ifname='%s'",
wpa_s->pending_interface_name);
return -1;
}
return 0;
}
wpas_p2p_get_group_ifname(wpa_s, ifname, sizeof(ifname));
force_ifname[0] = '\0';
wpa_printf(MSG_DEBUG, "P2P: Create a new interface %s for the group",
ifname);
wpa_s->p2p_group_idx++;
wpa_s->pending_interface_type = type;
if (wpa_drv_if_add(wpa_s, type, ifname, NULL, NULL, force_ifname,
wpa_s->pending_interface_addr, NULL) < 0) {
wpa_printf(MSG_ERROR, "P2P: Failed to create new group "
"interface");
return -1;
}
if (force_ifname[0]) {
wpa_printf(MSG_DEBUG, "P2P: Driver forced interface name %s",
force_ifname);
os_strlcpy(wpa_s->pending_interface_name, force_ifname,
sizeof(wpa_s->pending_interface_name));
} else
os_strlcpy(wpa_s->pending_interface_name, ifname,
sizeof(wpa_s->pending_interface_name));
wpa_printf(MSG_DEBUG, "P2P: Created pending virtual interface %s addr "
MACSTR, wpa_s->pending_interface_name,
MAC2STR(wpa_s->pending_interface_addr));
return 0;
}
static void wpas_p2p_remove_pending_group_interface(
struct wpa_supplicant *wpa_s)
{
if (!wpa_s->pending_interface_name[0] ||
is_zero_ether_addr(wpa_s->pending_interface_addr))
return; /* No pending virtual interface */
wpa_printf(MSG_DEBUG, "P2P: Removing pending group interface %s",
wpa_s->pending_interface_name);
wpa_drv_if_remove(wpa_s, wpa_s->pending_interface_type,
wpa_s->pending_interface_name);
os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN);
wpa_s->pending_interface_name[0] = '\0';
}
static struct wpa_supplicant *
wpas_p2p_init_group_interface(struct wpa_supplicant *wpa_s, int go)
{
struct wpa_interface iface;
struct wpa_supplicant *group_wpa_s;
if (!wpa_s->pending_interface_name[0]) {
wpa_printf(MSG_ERROR, "P2P: No pending group interface");
if (!wpas_p2p_create_iface(wpa_s))
return NULL;
/*
* Something has forced us to remove the pending interface; try
* to create a new one and hope for the best that we will get
* the same local address.
*/
if (wpas_p2p_add_group_interface(wpa_s, go ? WPA_IF_P2P_GO :
WPA_IF_P2P_CLIENT) < 0)
return NULL;
}
os_memset(&iface, 0, sizeof(iface));
iface.ifname = wpa_s->pending_interface_name;
iface.driver = wpa_s->driver->name;
if (wpa_s->conf->ctrl_interface == NULL &&
wpa_s->parent != wpa_s &&
wpa_s->p2p_mgmt &&
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE))
iface.ctrl_interface = wpa_s->parent->conf->ctrl_interface;
else
iface.ctrl_interface = wpa_s->conf->ctrl_interface;
iface.driver_param = wpa_s->conf->driver_param;
group_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface);
if (group_wpa_s == NULL) {
wpa_printf(MSG_ERROR, "P2P: Failed to create new "
"wpa_supplicant interface");
return NULL;
}
wpa_s->pending_interface_name[0] = '\0';
group_wpa_s->parent = wpa_s;
group_wpa_s->p2p_group_interface = go ? P2P_GROUP_INTERFACE_GO :
P2P_GROUP_INTERFACE_CLIENT;
wpa_s->global->p2p_group_formation = group_wpa_s;
wpas_p2p_clone_config(group_wpa_s, wpa_s);
return group_wpa_s;
}
static void wpas_p2p_group_formation_timeout(void *eloop_ctx,
void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_printf(MSG_DEBUG, "P2P: Group Formation timed out");
wpas_p2p_group_formation_failed(wpa_s);
}
void wpas_p2p_group_formation_failed(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
if (wpa_s->global->p2p)
p2p_group_formation_failed(wpa_s->global->p2p);
wpas_group_formation_completed(wpa_s, 0);
}
static void wpas_p2p_grpform_fail_after_wps(struct wpa_supplicant *wpa_s)
{
wpa_printf(MSG_DEBUG, "P2P: Reject group formation due to WPS provisioning failure");
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
wpa_s->global->p2p_fail_on_wps_complete = 0;
}
void wpas_p2p_ap_setup_failed(struct wpa_supplicant *wpa_s)
{
if (wpa_s->global->p2p_group_formation != wpa_s)
return;
/* Speed up group formation timeout since this cannot succeed */
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
static void wpas_go_neg_completed(void *ctx, struct p2p_go_neg_results *res)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = 0;
}
if (res->status) {
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_GO_NEG_FAILURE "status=%d",
res->status);
wpas_notify_p2p_go_neg_completed(wpa_s, res);
wpas_p2p_remove_pending_group_interface(wpa_s);
return;
}
if (wpa_s->p2p_go_ht40)
res->ht40 = 1;
if (wpa_s->p2p_go_vht)
res->vht = 1;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_SUCCESS "role=%s "
"freq=%d ht40=%d peer_dev=" MACSTR " peer_iface=" MACSTR
" wps_method=%s",
res->role_go ? "GO" : "client", res->freq, res->ht40,
MAC2STR(res->peer_device_addr),
MAC2STR(res->peer_interface_addr),
p2p_wps_method_text(res->wps_method));
wpas_notify_p2p_go_neg_completed(wpa_s, res);
if (res->role_go && wpa_s->p2p_persistent_id >= 0) {
struct wpa_ssid *ssid;
ssid = wpa_config_get_network(wpa_s->conf,
wpa_s->p2p_persistent_id);
if (ssid && ssid->disabled == 2 &&
ssid->mode == WPAS_MODE_P2P_GO && ssid->passphrase) {
size_t len = os_strlen(ssid->passphrase);
wpa_printf(MSG_DEBUG, "P2P: Override passphrase based "
"on requested persistent group");
os_memcpy(res->passphrase, ssid->passphrase, len);
res->passphrase[len] = '\0';
}
}
if (wpa_s->create_p2p_iface) {
struct wpa_supplicant *group_wpa_s =
wpas_p2p_init_group_interface(wpa_s, res->role_go);
if (group_wpa_s == NULL) {
wpas_p2p_remove_pending_group_interface(wpa_s);
eloop_cancel_timeout(wpas_p2p_long_listen_timeout,
wpa_s, NULL);
wpas_p2p_group_formation_failed(wpa_s);
return;
}
if (group_wpa_s != wpa_s) {
os_memcpy(group_wpa_s->p2p_pin, wpa_s->p2p_pin,
sizeof(group_wpa_s->p2p_pin));
group_wpa_s->p2p_wps_method = wpa_s->p2p_wps_method;
}
os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN);
wpa_s->pending_interface_name[0] = '\0';
group_wpa_s->p2p_in_provisioning = 1;
if (res->role_go)
wpas_start_wps_go(group_wpa_s, res, 1);
else
wpas_start_wps_enrollee(group_wpa_s, res);
} else {
wpa_s->p2p_in_provisioning = 1;
wpa_s->global->p2p_group_formation = wpa_s;
if (res->role_go)
wpas_start_wps_go(wpa_s, res, 1);
else
wpas_start_wps_enrollee(ctx, res);
}
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL);
eloop_register_timeout(15 + res->peer_config_timeout / 100,
(res->peer_config_timeout % 100) * 10000,
wpas_p2p_group_formation_timeout, wpa_s, NULL);
}
static void wpas_go_neg_req_rx(void *ctx, const u8 *src, u16 dev_passwd_id)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_REQUEST MACSTR
" dev_passwd_id=%u", MAC2STR(src), dev_passwd_id);
wpas_notify_p2p_go_neg_req(wpa_s, src, dev_passwd_id);
}
static void wpas_dev_found(void *ctx, const u8 *addr,
const struct p2p_peer_info *info,
int new_device)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
struct wpa_supplicant *wpa_s = ctx;
char devtype[WPS_DEV_TYPE_BUFSIZE];
char *wfd_dev_info_hex = NULL;
#ifdef CONFIG_WIFI_DISPLAY
wfd_dev_info_hex = wifi_display_subelem_hex(info->wfd_subelems,
WFD_SUBELEM_DEVICE_INFO);
#endif /* CONFIG_WIFI_DISPLAY */
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_FOUND MACSTR
" p2p_dev_addr=" MACSTR
" pri_dev_type=%s name='%s' config_methods=0x%x "
"dev_capab=0x%x group_capab=0x%x%s%s%s",
MAC2STR(addr), MAC2STR(info->p2p_device_addr),
wps_dev_type_bin2str(info->pri_dev_type, devtype,
sizeof(devtype)),
info->device_name, info->config_methods,
info->dev_capab, info->group_capab,
wfd_dev_info_hex ? " wfd_dev_info=0x" : "",
wfd_dev_info_hex ? wfd_dev_info_hex : "",
info->vendor_elems ? " vendor_elems=1" : "");
os_free(wfd_dev_info_hex);
#endif /* CONFIG_NO_STDOUT_DEBUG */
wpas_notify_p2p_device_found(ctx, info->p2p_device_addr, new_device);
}
static void wpas_dev_lost(void *ctx, const u8 *dev_addr)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_LOST
"p2p_dev_addr=" MACSTR, MAC2STR(dev_addr));
wpas_notify_p2p_device_lost(wpa_s, dev_addr);
}
static void wpas_find_stopped(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_FIND_STOPPED);
}
struct wpas_p2p_listen_work {
unsigned int freq;
unsigned int duration;
struct wpabuf *probe_resp_ie;
};
static void wpas_p2p_listen_work_free(struct wpas_p2p_listen_work *lwork)
{
if (lwork == NULL)
return;
wpabuf_free(lwork->probe_resp_ie);
os_free(lwork);
}
static void wpas_p2p_listen_work_done(struct wpa_supplicant *wpa_s)
{
struct wpas_p2p_listen_work *lwork;
if (!wpa_s->p2p_listen_work)
return;
lwork = wpa_s->p2p_listen_work->ctx;
wpas_p2p_listen_work_free(lwork);
radio_work_done(wpa_s->p2p_listen_work);
wpa_s->p2p_listen_work = NULL;
}
static void wpas_start_listen_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_supplicant *wpa_s = work->wpa_s;
struct wpas_p2p_listen_work *lwork = work->ctx;
if (deinit) {
if (work->started) {
wpa_s->p2p_listen_work = NULL;
wpas_stop_listen(wpa_s);
}
wpas_p2p_listen_work_free(lwork);
return;
}
wpa_s->p2p_listen_work = work;
wpa_drv_set_ap_wps_ie(wpa_s, NULL, lwork->probe_resp_ie, NULL);
if (wpa_drv_probe_req_report(wpa_s, 1) < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver to "
"report received Probe Request frames");
wpas_p2p_listen_work_done(wpa_s);
return;
}
wpa_s->pending_listen_freq = lwork->freq;
wpa_s->pending_listen_duration = lwork->duration;
if (wpa_drv_remain_on_channel(wpa_s, lwork->freq, lwork->duration) < 0)
{
wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver "
"to remain on channel (%u MHz) for Listen "
"state", lwork->freq);
wpas_p2p_listen_work_done(wpa_s);
wpa_s->pending_listen_freq = 0;
return;
}
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = lwork->freq;
}
static int wpas_start_listen(void *ctx, unsigned int freq,
unsigned int duration,
const struct wpabuf *probe_resp_ie)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpas_p2p_listen_work *lwork;
if (wpa_s->p2p_listen_work) {
wpa_printf(MSG_DEBUG, "P2P: Reject start_listen since p2p_listen_work already exists");
return -1;
}
lwork = os_zalloc(sizeof(*lwork));
if (lwork == NULL)
return -1;
lwork->freq = freq;
lwork->duration = duration;
if (probe_resp_ie) {
lwork->probe_resp_ie = wpabuf_dup(probe_resp_ie);
if (lwork->probe_resp_ie == NULL) {
wpas_p2p_listen_work_free(lwork);
return -1;
}
}
if (radio_add_work(wpa_s, freq, "p2p-listen", 0, wpas_start_listen_cb,
lwork) < 0) {
wpas_p2p_listen_work_free(lwork);
return -1;
}
return 0;
}
static void wpas_stop_listen(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = 0;
}
wpa_drv_set_ap_wps_ie(wpa_s, NULL, NULL, NULL);
wpa_drv_probe_req_report(wpa_s, 0);
wpas_p2p_listen_work_done(wpa_s);
}
static int wpas_send_probe_resp(void *ctx, const struct wpabuf *buf)
{
struct wpa_supplicant *wpa_s = ctx;
return wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1);
}
/*
* DNS Header section is used only to calculate compression pointers, so the
* contents of this data does not matter, but the length needs to be reserved
* in the virtual packet.
*/
#define DNS_HEADER_LEN 12
/*
* 27-octet in-memory packet from P2P specification containing two implied
* queries for _tcp.lcoal. PTR IN and _udp.local. PTR IN
*/
#define P2P_SD_IN_MEMORY_LEN 27
static int p2p_sd_dns_uncompress_label(char **upos, char *uend, u8 *start,
u8 **spos, const u8 *end)
{
while (*spos < end) {
u8 val = ((*spos)[0] & 0xc0) >> 6;
int len;
if (val == 1 || val == 2) {
/* These are reserved values in RFC 1035 */
wpa_printf(MSG_DEBUG, "P2P: Invalid domain name "
"sequence starting with 0x%x", val);
return -1;
}
if (val == 3) {
u16 offset;
u8 *spos_tmp;
/* Offset */
if (*spos + 2 > end) {
wpa_printf(MSG_DEBUG, "P2P: No room for full "
"DNS offset field");
return -1;
}
offset = (((*spos)[0] & 0x3f) << 8) | (*spos)[1];
if (offset >= *spos - start) {
wpa_printf(MSG_DEBUG, "P2P: Invalid DNS "
"pointer offset %u", offset);
return -1;
}
(*spos) += 2;
spos_tmp = start + offset;
return p2p_sd_dns_uncompress_label(upos, uend, start,
&spos_tmp,
*spos - 2);
}
/* Label */
len = (*spos)[0] & 0x3f;
if (len == 0)
return 0;
(*spos)++;
if (*spos + len > end) {
wpa_printf(MSG_DEBUG, "P2P: Invalid domain name "
"sequence - no room for label with length "
"%u", len);
return -1;
}
if (*upos + len + 2 > uend)
return -2;
os_memcpy(*upos, *spos, len);
*spos += len;
*upos += len;
(*upos)[0] = '.';
(*upos)++;
(*upos)[0] = '\0';
}
return 0;
}
/* Uncompress domain names per RFC 1035 using the P2P SD in-memory packet.
* Returns -1 on parsing error (invalid input sequence), -2 if output buffer is
* not large enough */
static int p2p_sd_dns_uncompress(char *buf, size_t buf_len, const u8 *msg,
size_t msg_len, size_t offset)
{
/* 27-octet in-memory packet from P2P specification */
const char *prefix = "\x04_tcp\x05local\x00\x00\x0C\x00\x01"
"\x04_udp\xC0\x11\x00\x0C\x00\x01";
u8 *tmp, *end, *spos;
char *upos, *uend;
int ret = 0;
if (buf_len < 2)
return -1;
if (offset > msg_len)
return -1;
tmp = os_malloc(DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN + msg_len);
if (tmp == NULL)
return -1;
spos = tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN;
end = spos + msg_len;
spos += offset;
os_memset(tmp, 0, DNS_HEADER_LEN);
os_memcpy(tmp + DNS_HEADER_LEN, prefix, P2P_SD_IN_MEMORY_LEN);
os_memcpy(tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN, msg, msg_len);
upos = buf;
uend = buf + buf_len;
ret = p2p_sd_dns_uncompress_label(&upos, uend, tmp, &spos, end);
if (ret) {
os_free(tmp);
return ret;
}
if (upos == buf) {
upos[0] = '.';
upos[1] = '\0';
} else if (upos[-1] == '.')
upos[-1] = '\0';
os_free(tmp);
return 0;
}
static struct p2p_srv_bonjour *
wpas_p2p_service_get_bonjour(struct wpa_supplicant *wpa_s,
const struct wpabuf *query)
{
struct p2p_srv_bonjour *bsrv;
size_t len;
len = wpabuf_len(query);
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (len == wpabuf_len(bsrv->query) &&
os_memcmp(wpabuf_head(query), wpabuf_head(bsrv->query),
len) == 0)
return bsrv;
}
return NULL;
}
static struct p2p_srv_upnp *
wpas_p2p_service_get_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (version == usrv->version &&
os_strcmp(service, usrv->service) == 0)
return usrv;
}
return NULL;
}
static void wpas_sd_add_proto_not_avail(struct wpabuf *resp, u8 srv_proto,
u8 srv_trans_id)
{
u8 *len_pos;
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, srv_proto);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_PROTO_NOT_AVAILABLE);
/* Response Data: empty */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
static void wpas_sd_all_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id)
{
struct p2p_srv_bonjour *bsrv;
u8 *len_pos;
wpa_printf(MSG_DEBUG, "P2P: SD Request for all Bonjour services");
if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available");
return;
}
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (wpabuf_tailroom(resp) <
5 + wpabuf_len(bsrv->query) + wpabuf_len(bsrv->resp))
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service",
wpabuf_head(bsrv->resp),
wpabuf_len(bsrv->resp));
/* Response Data */
wpabuf_put_buf(resp, bsrv->query); /* Key */
wpabuf_put_buf(resp, bsrv->resp); /* Value */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static int match_bonjour_query(struct p2p_srv_bonjour *bsrv, const u8 *query,
size_t query_len)
{
char str_rx[256], str_srv[256];
if (query_len < 3 || wpabuf_len(bsrv->query) < 3)
return 0; /* Too short to include DNS Type and Version */
if (os_memcmp(query + query_len - 3,
wpabuf_head_u8(bsrv->query) + wpabuf_len(bsrv->query) - 3,
3) != 0)
return 0; /* Mismatch in DNS Type or Version */
if (query_len == wpabuf_len(bsrv->query) &&
os_memcmp(query, wpabuf_head(bsrv->query), query_len - 3) == 0)
return 1; /* Binary match */
if (p2p_sd_dns_uncompress(str_rx, sizeof(str_rx), query, query_len - 3,
0))
return 0; /* Failed to uncompress query */
if (p2p_sd_dns_uncompress(str_srv, sizeof(str_srv),
wpabuf_head(bsrv->query),
wpabuf_len(bsrv->query) - 3, 0))
return 0; /* Failed to uncompress service */
return os_strcmp(str_rx, str_srv) == 0;
}
static void wpas_sd_req_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
struct p2p_srv_bonjour *bsrv;
u8 *len_pos;
int matches = 0;
wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for Bonjour",
query, query_len);
if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_BONJOUR,
srv_trans_id);
return;
}
if (query_len == 0) {
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
return;
}
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (!match_bonjour_query(bsrv, query, query_len))
continue;
if (wpabuf_tailroom(resp) <
5 + query_len + wpabuf_len(bsrv->resp))
return;
matches++;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service",
wpabuf_head(bsrv->resp),
wpabuf_len(bsrv->resp));
/* Response Data */
wpabuf_put_data(resp, query, query_len); /* Key */
wpabuf_put_buf(resp, bsrv->resp); /* Value */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
if (matches == 0) {
wpa_printf(MSG_DEBUG, "P2P: Requested Bonjour service not "
"available");
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE);
/* Response Data: empty */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static void wpas_sd_all_upnp(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id)
{
struct p2p_srv_upnp *usrv;
u8 *len_pos;
wpa_printf(MSG_DEBUG, "P2P: SD Request for all UPnP services");
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) {
wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available");
return;
}
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (wpabuf_tailroom(resp) < 5 + 1 + os_strlen(usrv->service))
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_UPNP);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
/* Response Data */
wpabuf_put_u8(resp, usrv->version);
wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s",
usrv->service);
wpabuf_put_str(resp, usrv->service);
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static void wpas_sd_req_upnp(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
struct p2p_srv_upnp *usrv;
u8 *len_pos;
u8 version;
char *str;
int count = 0;
wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for UPnP",
query, query_len);
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) {
wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_UPNP,
srv_trans_id);
return;
}
if (query_len == 0) {
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
return;
}
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_UPNP);
wpabuf_put_u8(resp, srv_trans_id);
version = query[0];
str = os_malloc(query_len);
if (str == NULL)
return;
os_memcpy(str, query + 1, query_len - 1);
str[query_len - 1] = '\0';
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (version != usrv->version)
continue;
if (os_strcmp(str, "ssdp:all") != 0 &&
os_strstr(usrv->service, str) == NULL)
continue;
if (wpabuf_tailroom(resp) < 2)
break;
if (count == 0) {
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
/* Response Data */
wpabuf_put_u8(resp, version);
} else
wpabuf_put_u8(resp, ',');
count++;
wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s",
usrv->service);
if (wpabuf_tailroom(resp) < os_strlen(usrv->service))
break;
wpabuf_put_str(resp, usrv->service);
}
os_free(str);
if (count == 0) {
wpa_printf(MSG_DEBUG, "P2P: Requested UPnP service not "
"available");
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE);
/* Response Data: empty */
}
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
#ifdef CONFIG_WIFI_DISPLAY
static void wpas_sd_req_wfd(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
const u8 *pos;
u8 role;
u8 *len_pos;
wpa_hexdump(MSG_DEBUG, "P2P: SD Request for WFD", query, query_len);
if (!wpa_s->global->wifi_display) {
wpa_printf(MSG_DEBUG, "P2P: WFD protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_WIFI_DISPLAY,
srv_trans_id);
return;
}
if (query_len < 1) {
wpa_printf(MSG_DEBUG, "P2P: Missing WFD Requested Device "
"Role");
return;
}
if (wpabuf_tailroom(resp) < 5)
return;
pos = query;
role = *pos++;
wpa_printf(MSG_DEBUG, "P2P: WSD for device role 0x%x", role);
/* TODO: role specific handling */
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_WIFI_DISPLAY);
wpabuf_put_u8(resp, srv_trans_id);
wpabuf_put_u8(resp, P2P_SD_SUCCESS); /* Status Code */
while (pos < query + query_len) {
if (*pos < MAX_WFD_SUBELEMS &&
wpa_s->global->wfd_subelem[*pos] &&
wpabuf_tailroom(resp) >=
wpabuf_len(wpa_s->global->wfd_subelem[*pos])) {
wpa_printf(MSG_DEBUG, "P2P: Add WSD response "
"subelement %u", *pos);
wpabuf_put_buf(resp, wpa_s->global->wfd_subelem[*pos]);
}
pos++;
}
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
#endif /* CONFIG_WIFI_DISPLAY */
static void wpas_sd_request(void *ctx, int freq, const u8 *sa, u8 dialog_token,
u16 update_indic, const u8 *tlvs, size_t tlvs_len)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos = tlvs;
const u8 *end = tlvs + tlvs_len;
const u8 *tlv_end;
u16 slen;
struct wpabuf *resp;
u8 srv_proto, srv_trans_id;
size_t buf_len;
char *buf;
wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Request TLVs",
tlvs, tlvs_len);
buf_len = 2 * tlvs_len + 1;
buf = os_malloc(buf_len);
if (buf) {
wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len);
wpa_msg_ctrl(wpa_s, MSG_INFO, P2P_EVENT_SERV_DISC_REQ "%d "
MACSTR " %u %u %s",
freq, MAC2STR(sa), dialog_token, update_indic,
buf);
os_free(buf);
}
if (wpa_s->p2p_sd_over_ctrl_iface) {
wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token,
update_indic, tlvs, tlvs_len);
return; /* to be processed by an external program */
}
resp = wpabuf_alloc(10000);
if (resp == NULL)
return;
while (pos + 1 < end) {
wpa_printf(MSG_DEBUG, "P2P: Service Request TLV");
slen = WPA_GET_LE16(pos);
pos += 2;
if (pos + slen > end || slen < 2) {
wpa_printf(MSG_DEBUG, "P2P: Unexpected Query Data "
"length");
wpabuf_free(resp);
return;
}
tlv_end = pos + slen;
srv_proto = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u",
srv_proto);
srv_trans_id = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u",
srv_trans_id);
wpa_hexdump(MSG_MSGDUMP, "P2P: Query Data",
pos, tlv_end - pos);
if (wpa_s->force_long_sd) {
wpa_printf(MSG_DEBUG, "P2P: SD test - force long "
"response");
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
goto done;
}
switch (srv_proto) {
case P2P_SERV_ALL_SERVICES:
wpa_printf(MSG_DEBUG, "P2P: Service Discovery Request "
"for all services");
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp) &&
dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: No service "
"discovery protocols available");
wpas_sd_add_proto_not_avail(
resp, P2P_SERV_ALL_SERVICES,
srv_trans_id);
break;
}
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
break;
case P2P_SERV_BONJOUR:
wpas_sd_req_bonjour(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
case P2P_SERV_UPNP:
wpas_sd_req_upnp(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
#ifdef CONFIG_WIFI_DISPLAY
case P2P_SERV_WIFI_DISPLAY:
wpas_sd_req_wfd(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
#endif /* CONFIG_WIFI_DISPLAY */
default:
wpa_printf(MSG_DEBUG, "P2P: Unavailable service "
"protocol %u", srv_proto);
wpas_sd_add_proto_not_avail(resp, srv_proto,
srv_trans_id);
break;
}
pos = tlv_end;
}
done:
wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token,
update_indic, tlvs, tlvs_len);
wpas_p2p_sd_response(wpa_s, freq, sa, dialog_token, resp);
wpabuf_free(resp);
}
static void wpas_sd_response(void *ctx, const u8 *sa, u16 update_indic,
const u8 *tlvs, size_t tlvs_len)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos = tlvs;
const u8 *end = tlvs + tlvs_len;
const u8 *tlv_end;
u16 slen;
size_t buf_len;
char *buf;
wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Response TLVs",
tlvs, tlvs_len);
if (tlvs_len > 1500) {
/* TODO: better way for handling this */
wpa_msg_ctrl(wpa_s, MSG_INFO,
P2P_EVENT_SERV_DISC_RESP MACSTR
" %u <long response: %u bytes>",
MAC2STR(sa), update_indic,
(unsigned int) tlvs_len);
} else {
buf_len = 2 * tlvs_len + 1;
buf = os_malloc(buf_len);
if (buf) {
wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len);
wpa_msg_ctrl(wpa_s, MSG_INFO,
P2P_EVENT_SERV_DISC_RESP MACSTR " %u %s",
MAC2STR(sa), update_indic, buf);
os_free(buf);
}
}
while (pos < end) {
u8 srv_proto, srv_trans_id, status;
wpa_printf(MSG_DEBUG, "P2P: Service Response TLV");
slen = WPA_GET_LE16(pos);
pos += 2;
if (pos + slen > end || slen < 3) {
wpa_printf(MSG_DEBUG, "P2P: Unexpected Response Data "
"length");
return;
}
tlv_end = pos + slen;
srv_proto = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u",
srv_proto);
srv_trans_id = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u",
srv_trans_id);
status = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Status Code ID %u",
status);
wpa_hexdump(MSG_MSGDUMP, "P2P: Response Data",
pos, tlv_end - pos);
pos = tlv_end;
}
wpas_notify_p2p_sd_response(wpa_s, sa, update_indic, tlvs, tlvs_len);
}
u64 wpas_p2p_sd_request(struct wpa_supplicant *wpa_s, const u8 *dst,
const struct wpabuf *tlvs)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
return (uintptr_t) p2p_sd_request(wpa_s->global->p2p, dst, tlvs);
}
u64 wpas_p2p_sd_request_upnp(struct wpa_supplicant *wpa_s, const u8 *dst,
u8 version, const char *query)
{
struct wpabuf *tlvs;
u64 ret;
tlvs = wpabuf_alloc(2 + 1 + 1 + 1 + os_strlen(query));
if (tlvs == NULL)
return 0;
wpabuf_put_le16(tlvs, 1 + 1 + 1 + os_strlen(query));
wpabuf_put_u8(tlvs, P2P_SERV_UPNP); /* Service Protocol Type */
wpabuf_put_u8(tlvs, 1); /* Service Transaction ID */
wpabuf_put_u8(tlvs, version);
wpabuf_put_str(tlvs, query);
ret = wpas_p2p_sd_request(wpa_s, dst, tlvs);
wpabuf_free(tlvs);
return ret;
}
#ifdef CONFIG_WIFI_DISPLAY
static u64 wpas_p2p_sd_request_wfd(struct wpa_supplicant *wpa_s, const u8 *dst,
const struct wpabuf *tlvs)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
return (uintptr_t) p2p_sd_request_wfd(wpa_s->global->p2p, dst, tlvs);
}
#define MAX_WFD_SD_SUBELEMS 20
static void wfd_add_sd_req_role(struct wpabuf *tlvs, u8 id, u8 role,
const char *subelems)
{
u8 *len;
const char *pos;
int val;
int count = 0;
len = wpabuf_put(tlvs, 2);
wpabuf_put_u8(tlvs, P2P_SERV_WIFI_DISPLAY); /* Service Protocol Type */
wpabuf_put_u8(tlvs, id); /* Service Transaction ID */
wpabuf_put_u8(tlvs, role);
pos = subelems;
while (*pos) {
val = atoi(pos);
if (val >= 0 && val < 256) {
wpabuf_put_u8(tlvs, val);
count++;
if (count == MAX_WFD_SD_SUBELEMS)
break;
}
pos = os_strchr(pos + 1, ',');
if (pos == NULL)
break;
pos++;
}
WPA_PUT_LE16(len, (u8 *) wpabuf_put(tlvs, 0) - len - 2);
}
u64 wpas_p2p_sd_request_wifi_display(struct wpa_supplicant *wpa_s,
const u8 *dst, const char *role)
{
struct wpabuf *tlvs;
u64 ret;
const char *subelems;
u8 id = 1;
subelems = os_strchr(role, ' ');
if (subelems == NULL)
return 0;
subelems++;
tlvs = wpabuf_alloc(4 * (2 + 1 + 1 + 1 + MAX_WFD_SD_SUBELEMS));
if (tlvs == NULL)
return 0;
if (os_strstr(role, "[source]"))
wfd_add_sd_req_role(tlvs, id++, 0x00, subelems);
if (os_strstr(role, "[pri-sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x01, subelems);
if (os_strstr(role, "[sec-sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x02, subelems);
if (os_strstr(role, "[source+sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x03, subelems);
ret = wpas_p2p_sd_request_wfd(wpa_s, dst, tlvs);
wpabuf_free(tlvs);
return ret;
}
#endif /* CONFIG_WIFI_DISPLAY */
int wpas_p2p_sd_cancel_request(struct wpa_supplicant *wpa_s, u64 req)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
return p2p_sd_cancel_request(wpa_s->global->p2p,
(void *) (uintptr_t) req);
}
void wpas_p2p_sd_response(struct wpa_supplicant *wpa_s, int freq,
const u8 *dst, u8 dialog_token,
const struct wpabuf *resp_tlvs)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
p2p_sd_response(wpa_s->global->p2p, freq, dst, dialog_token,
resp_tlvs);
}
void wpas_p2p_sd_service_update(struct wpa_supplicant *wpa_s)
{
if (wpa_s->global->p2p)
p2p_sd_service_update(wpa_s->global->p2p);
}
static void wpas_p2p_srv_bonjour_free(struct p2p_srv_bonjour *bsrv)
{
dl_list_del(&bsrv->list);
wpabuf_free(bsrv->query);
wpabuf_free(bsrv->resp);
os_free(bsrv);
}
static void wpas_p2p_srv_upnp_free(struct p2p_srv_upnp *usrv)
{
dl_list_del(&usrv->list);
os_free(usrv->service);
os_free(usrv);
}
void wpas_p2p_service_flush(struct wpa_supplicant *wpa_s)
{
struct p2p_srv_bonjour *bsrv, *bn;
struct p2p_srv_upnp *usrv, *un;
dl_list_for_each_safe(bsrv, bn, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list)
wpas_p2p_srv_bonjour_free(bsrv);
dl_list_for_each_safe(usrv, un, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list)
wpas_p2p_srv_upnp_free(usrv);
wpas_p2p_sd_service_update(wpa_s);
}
int wpas_p2p_service_add_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *query, struct wpabuf *resp)
{
struct p2p_srv_bonjour *bsrv;
bsrv = os_zalloc(sizeof(*bsrv));
if (bsrv == NULL)
return -1;
bsrv->query = query;
bsrv->resp = resp;
dl_list_add(&wpa_s->global->p2p_srv_bonjour, &bsrv->list);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_del_bonjour(struct wpa_supplicant *wpa_s,
const struct wpabuf *query)
{
struct p2p_srv_bonjour *bsrv;
bsrv = wpas_p2p_service_get_bonjour(wpa_s, query);
if (bsrv == NULL)
return -1;
wpas_p2p_srv_bonjour_free(bsrv);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_add_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
if (wpas_p2p_service_get_upnp(wpa_s, version, service))
return 0; /* Already listed */
usrv = os_zalloc(sizeof(*usrv));
if (usrv == NULL)
return -1;
usrv->version = version;
usrv->service = os_strdup(service);
if (usrv->service == NULL) {
os_free(usrv);
return -1;
}
dl_list_add(&wpa_s->global->p2p_srv_upnp, &usrv->list);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_del_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
usrv = wpas_p2p_service_get_upnp(wpa_s, version, service);
if (usrv == NULL)
return -1;
wpas_p2p_srv_upnp_free(usrv);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
static void wpas_prov_disc_local_display(struct wpa_supplicant *wpa_s,
const u8 *peer, const char *params,
unsigned int generated_pin)
{
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_SHOW_PIN MACSTR
" %08d%s", MAC2STR(peer), generated_pin, params);
}
static void wpas_prov_disc_local_keypad(struct wpa_supplicant *wpa_s,
const u8 *peer, const char *params)
{
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_ENTER_PIN MACSTR
"%s", MAC2STR(peer), params);
}
static void wpas_prov_disc_req(void *ctx, const u8 *peer, u16 config_methods,
const u8 *dev_addr, const u8 *pri_dev_type,
const char *dev_name, u16 supp_config_methods,
u8 dev_capab, u8 group_capab, const u8 *group_id,
size_t group_id_len)
{
struct wpa_supplicant *wpa_s = ctx;
char devtype[WPS_DEV_TYPE_BUFSIZE];
char params[300];
u8 empty_dev_type[8];
unsigned int generated_pin = 0;
struct wpa_supplicant *group = NULL;
if (group_id) {
for (group = wpa_s->global->ifaces; group; group = group->next)
{
struct wpa_ssid *s = group->current_ssid;
if (s != NULL &&
s->mode == WPAS_MODE_P2P_GO &&
group_id_len - ETH_ALEN == s->ssid_len &&
os_memcmp(group_id + ETH_ALEN, s->ssid,
s->ssid_len) == 0)
break;
}
}
if (pri_dev_type == NULL) {
os_memset(empty_dev_type, 0, sizeof(empty_dev_type));
pri_dev_type = empty_dev_type;
}
os_snprintf(params, sizeof(params), " p2p_dev_addr=" MACSTR
" pri_dev_type=%s name='%s' config_methods=0x%x "
"dev_capab=0x%x group_capab=0x%x%s%s",
MAC2STR(dev_addr),
wps_dev_type_bin2str(pri_dev_type, devtype,
sizeof(devtype)),
dev_name, supp_config_methods, dev_capab, group_capab,
group ? " group=" : "",
group ? group->ifname : "");
params[sizeof(params) - 1] = '\0';
if (config_methods & WPS_CONFIG_DISPLAY) {
generated_pin = wps_generate_pin();
wpas_prov_disc_local_display(wpa_s, peer, params,
generated_pin);
} else if (config_methods & WPS_CONFIG_KEYPAD)
wpas_prov_disc_local_keypad(wpa_s, peer, params);
else if (config_methods & WPS_CONFIG_PUSHBUTTON)
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_REQ
MACSTR "%s", MAC2STR(peer), params);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 1 /* request */,
P2P_PROV_DISC_SUCCESS,
config_methods, generated_pin);
}
static void wpas_prov_disc_resp(void *ctx, const u8 *peer, u16 config_methods)
{
struct wpa_supplicant *wpa_s = ctx;
unsigned int generated_pin = 0;
char params[20];
if (wpa_s->pending_pd_before_join &&
(os_memcmp(peer, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 ||
os_memcmp(peer, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0)) {
wpa_s->pending_pd_before_join = 0;
wpa_printf(MSG_DEBUG, "P2P: Starting pending "
"join-existing-group operation");
wpas_p2p_join_start(wpa_s, 0, NULL, 0);
return;
}
if (wpa_s->pending_pd_use == AUTO_PD_JOIN ||
wpa_s->pending_pd_use == AUTO_PD_GO_NEG)
os_snprintf(params, sizeof(params), " peer_go=%d",
wpa_s->pending_pd_use == AUTO_PD_JOIN);
else
params[0] = '\0';
if (config_methods & WPS_CONFIG_DISPLAY)
wpas_prov_disc_local_keypad(wpa_s, peer, params);
else if (config_methods & WPS_CONFIG_KEYPAD) {
generated_pin = wps_generate_pin();
wpas_prov_disc_local_display(wpa_s, peer, params,
generated_pin);
} else if (config_methods & WPS_CONFIG_PUSHBUTTON)
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_RESP
MACSTR "%s", MAC2STR(peer), params);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */,
P2P_PROV_DISC_SUCCESS,
config_methods, generated_pin);
}
static void wpas_prov_disc_fail(void *ctx, const u8 *peer,
enum p2p_prov_disc_status status)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->p2p_fallback_to_go_neg) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: PD for p2p_connect-auto "
"failed - fall back to GO Negotiation");
wpas_p2p_fallback_to_go_neg(wpa_s, 0);
return;
}
if (status == P2P_PROV_DISC_TIMEOUT_JOIN) {
wpa_s->pending_pd_before_join = 0;
wpa_printf(MSG_DEBUG, "P2P: Starting pending "
"join-existing-group operation (no ACK for PD "
"Req attempts)");
wpas_p2p_join_start(wpa_s, 0, NULL, 0);
return;
}
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_FAILURE
" p2p_dev_addr=" MACSTR " status=%d",
MAC2STR(peer), status);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */,
status, 0, 0);
}
static int freq_included(const struct p2p_channels *channels, unsigned int freq)
{
if (channels == NULL)
return 1; /* Assume no restrictions */
return p2p_channels_includes_freq(channels, freq);
}
/**
* Pick the best frequency to use from all the currently used frequencies.
*/
static int wpas_p2p_pick_best_used_freq(struct wpa_supplicant *wpa_s,
struct wpa_used_freq_data *freqs,
unsigned int num)
{
unsigned int i, c;
/* find a candidate freq that is supported by P2P */
for (c = 0; c < num; c++)
if (p2p_supported_freq(wpa_s->global->p2p, freqs[c].freq))
break;
if (c == num)
return 0;
/* once we have a candidate, try to find a 'better' one */
for (i = c + 1; i < num; i++) {
if (!p2p_supported_freq(wpa_s->global->p2p, freqs[i].freq))
continue;
/*
* 1. Infrastructure station interfaces have higher preference.
* 2. P2P Clients have higher preference.
* 3. All others.
*/
if (freqs[i].flags & WPA_FREQ_USED_BY_INFRA_STATION) {
c = i;
break;
}
if ((freqs[i].flags & WPA_FREQ_USED_BY_P2P_CLIENT))
c = i;
}
return freqs[c].freq;
}
static u8 wpas_invitation_process(void *ctx, const u8 *sa, const u8 *bssid,
const u8 *go_dev_addr, const u8 *ssid,
size_t ssid_len, int *go, u8 *group_bssid,
int *force_freq, int persistent_group,
const struct p2p_channels *channels,
int dev_pw_id)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *s;
struct wpa_used_freq_data *freqs;
struct wpa_supplicant *grp;
int best_freq;
if (!persistent_group) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR
" to join an active group (SSID: %s)",
MAC2STR(sa), wpa_ssid_txt(ssid, ssid_len));
if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) &&
(os_memcmp(go_dev_addr, wpa_s->p2p_auth_invite, ETH_ALEN)
== 0 ||
os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0)) {
wpa_printf(MSG_DEBUG, "P2P: Accept previously "
"authorized invitation");
goto accept_inv;
}
#ifdef CONFIG_WPS_NFC
if (dev_pw_id >= 0 && wpa_s->parent->p2p_nfc_tag_enabled &&
dev_pw_id == wpa_s->parent->p2p_oob_dev_pw_id) {
wpa_printf(MSG_DEBUG, "P2P: Accept invitation based on local enabled NFC Tag");
wpa_s->parent->p2p_wps_method = WPS_NFC;
wpa_s->parent->pending_join_wps_method = WPS_NFC;
os_memcpy(wpa_s->parent->pending_join_dev_addr,
go_dev_addr, ETH_ALEN);
os_memcpy(wpa_s->parent->pending_join_iface_addr,
bssid, ETH_ALEN);
goto accept_inv;
}
#endif /* CONFIG_WPS_NFC */
/*
* Do not accept the invitation automatically; notify user and
* request approval.
*/
return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
}
grp = wpas_get_p2p_group(wpa_s, ssid, ssid_len, go);
if (grp) {
wpa_printf(MSG_DEBUG, "P2P: Accept invitation to already "
"running persistent group");
if (*go)
os_memcpy(group_bssid, grp->own_addr, ETH_ALEN);
goto accept_inv;
}
if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) &&
os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG, "P2P: Accept previously initiated "
"invitation to re-invoke a persistent group");
os_memset(wpa_s->p2p_auth_invite, 0, ETH_ALEN);
} else if (!wpa_s->conf->persistent_reconnect)
return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled == 2 &&
os_memcmp(s->bssid, go_dev_addr, ETH_ALEN) == 0 &&
s->ssid_len == ssid_len &&
os_memcmp(ssid, s->ssid, ssid_len) == 0)
break;
}
if (!s) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR
" requested reinvocation of an unknown group",
MAC2STR(sa));
return P2P_SC_FAIL_UNKNOWN_GROUP;
}
if (s->mode == WPAS_MODE_P2P_GO && !wpas_p2p_create_iface(wpa_s)) {
*go = 1;
if (wpa_s->wpa_state >= WPA_AUTHENTICATING) {
wpa_printf(MSG_DEBUG, "P2P: The only available "
"interface is already in use - reject "
"invitation");
return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
}
os_memcpy(group_bssid, wpa_s->own_addr, ETH_ALEN);
} else if (s->mode == WPAS_MODE_P2P_GO) {
*go = 1;
if (wpas_p2p_add_group_interface(wpa_s, WPA_IF_P2P_GO) < 0)
{
wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new "
"interface address for the group");
return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
}
os_memcpy(group_bssid, wpa_s->pending_interface_addr,
ETH_ALEN);
}
accept_inv:
wpas_p2p_set_own_freq_preference(wpa_s, 0);
best_freq = 0;
freqs = os_calloc(wpa_s->num_multichan_concurrent,
sizeof(struct wpa_used_freq_data));
if (freqs) {
int num_channels = wpa_s->num_multichan_concurrent;
int num = wpas_p2p_valid_oper_freqs(wpa_s, freqs, num_channels);
best_freq = wpas_p2p_pick_best_used_freq(wpa_s, freqs, num);
os_free(freqs);
}
/* Get one of the frequencies currently in use */
if (best_freq > 0) {
wpa_printf(MSG_DEBUG, "P2P: Trying to prefer a channel already used by one of the interfaces");
wpas_p2p_set_own_freq_preference(wpa_s, best_freq);
if (wpa_s->num_multichan_concurrent < 2 ||
wpas_p2p_num_unused_channels(wpa_s) < 1) {
wpa_printf(MSG_DEBUG, "P2P: No extra channels available - trying to force channel to match a channel already used by one of the interfaces");
*force_freq = best_freq;
}
}
if (*force_freq > 0 && wpa_s->num_multichan_concurrent > 1 &&
wpas_p2p_num_unused_channels(wpa_s) > 0) {
if (*go == 0) {
/* We are the client */
wpa_printf(MSG_DEBUG, "P2P: Peer was found to be "
"running a GO but we are capable of MCC, "
"figure out the best channel to use");
*force_freq = 0;
} else if (!freq_included(channels, *force_freq)) {
/* We are the GO, and *force_freq is not in the
* intersection */
wpa_printf(MSG_DEBUG, "P2P: Forced GO freq %d MHz not "
"in intersection but we are capable of MCC, "
"figure out the best channel to use",
*force_freq);
*force_freq = 0;
}
}
return P2P_SC_SUCCESS;
}
static void wpas_invitation_received(void *ctx, const u8 *sa, const u8 *bssid,
const u8 *ssid, size_t ssid_len,
const u8 *go_dev_addr, u8 status,
int op_freq)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *s;
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled == 2 &&
s->ssid_len == ssid_len &&
os_memcmp(ssid, s->ssid, ssid_len) == 0)
break;
}
if (status == P2P_SC_SUCCESS) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from peer " MACSTR
" was accepted; op_freq=%d MHz, SSID=%s",
MAC2STR(sa), op_freq, wpa_ssid_txt(ssid, ssid_len));
if (s) {
int go = s->mode == WPAS_MODE_P2P_GO;
wpas_p2p_group_add_persistent(
wpa_s, s, go, 0, op_freq, 0, 0, NULL,
go ? P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE : 0);
} else if (bssid) {
wpa_s->user_initiated_pd = 0;
wpas_p2p_join(wpa_s, bssid, go_dev_addr,
wpa_s->p2p_wps_method, 0, op_freq,
ssid, ssid_len);
}
return;
}
if (status != P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from peer " MACSTR
" was rejected (status %u)", MAC2STR(sa), status);
return;
}
if (!s) {
if (bssid) {
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_INVITATION_RECEIVED
"sa=" MACSTR " go_dev_addr=" MACSTR
" bssid=" MACSTR " unknown-network",
MAC2STR(sa), MAC2STR(go_dev_addr),
MAC2STR(bssid));
} else {
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_INVITATION_RECEIVED
"sa=" MACSTR " go_dev_addr=" MACSTR
" unknown-network",
MAC2STR(sa), MAC2STR(go_dev_addr));
}
return;
}
if (s->mode == WPAS_MODE_P2P_GO && op_freq) {
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED
"sa=" MACSTR " persistent=%d freq=%d",
MAC2STR(sa), s->id, op_freq);
} else {
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED
"sa=" MACSTR " persistent=%d",
MAC2STR(sa), s->id);
}
}
static void wpas_remove_persistent_peer(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const u8 *peer, int inv)
{
size_t i;
if (ssid == NULL)
return;
for (i = 0; ssid->p2p_client_list && i < ssid->num_p2p_clients; i++) {
if (os_memcmp(ssid->p2p_client_list + i * ETH_ALEN, peer,
ETH_ALEN) == 0)
break;
}
if (i >= ssid->num_p2p_clients || !ssid->p2p_client_list) {
if (ssid->mode != WPAS_MODE_P2P_GO &&
os_memcmp(ssid->bssid, peer, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG, "P2P: Remove persistent group %d "
"due to invitation result", ssid->id);
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
return;
}
return; /* Peer not found in client list */
}
wpa_printf(MSG_DEBUG, "P2P: Remove peer " MACSTR " from persistent "
"group %d client list%s",
MAC2STR(peer), ssid->id,
inv ? " due to invitation result" : "");
os_memmove(ssid->p2p_client_list + i * ETH_ALEN,
ssid->p2p_client_list + (i + 1) * ETH_ALEN,
(ssid->num_p2p_clients - i - 1) * ETH_ALEN);
ssid->num_p2p_clients--;
if (wpa_s->parent->conf->update_config &&
wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf))
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
}
static void wpas_remove_persistent_client(struct wpa_supplicant *wpa_s,
const u8 *peer)
{
struct wpa_ssid *ssid;
wpa_s = wpa_s->global->p2p_invite_group;
if (wpa_s == NULL)
return; /* No known invitation group */
ssid = wpa_s->current_ssid;
if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GO ||
!ssid->p2p_persistent_group)
return; /* Not operating as a GO in persistent group */
ssid = wpas_p2p_get_persistent(wpa_s->parent, peer,
ssid->ssid, ssid->ssid_len);
wpas_remove_persistent_peer(wpa_s, ssid, peer, 1);
}
static void wpas_invitation_result(void *ctx, int status, const u8 *bssid,
const struct p2p_channels *channels,
const u8 *peer, int neg_freq,
int peer_oper_freq)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *ssid;
int freq;
if (bssid) {
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RESULT
"status=%d " MACSTR,
status, MAC2STR(bssid));
} else {
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RESULT
"status=%d ", status);
}
wpas_notify_p2p_invitation_result(wpa_s, status, bssid);
wpa_printf(MSG_DEBUG, "P2P: Invitation result - status=%d peer=" MACSTR,
status, MAC2STR(peer));
if (wpa_s->pending_invite_ssid_id == -1) {
if (status == P2P_SC_FAIL_UNKNOWN_GROUP)
wpas_remove_persistent_client(wpa_s, peer);
return; /* Invitation to active group */
}
if (status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
wpa_printf(MSG_DEBUG, "P2P: Waiting for peer to start another "
"invitation exchange to indicate readiness for "
"re-invocation");
}
if (status != P2P_SC_SUCCESS) {
if (status == P2P_SC_FAIL_UNKNOWN_GROUP) {
ssid = wpa_config_get_network(
wpa_s->conf, wpa_s->pending_invite_ssid_id);
wpas_remove_persistent_peer(wpa_s, ssid, peer, 1);
}
wpas_p2p_remove_pending_group_interface(wpa_s);
return;
}
ssid = wpa_config_get_network(wpa_s->conf,
wpa_s->pending_invite_ssid_id);
if (ssid == NULL) {
wpa_printf(MSG_ERROR, "P2P: Could not find persistent group "
"data matching with invitation");
return;
}
/*
* The peer could have missed our ctrl::ack frame for Invitation
* Response and continue retransmitting the frame. To reduce the
* likelihood of the peer not getting successful TX status for the
* Invitation Response frame, wait a short time here before starting
* the persistent group so that we will remain on the current channel to
* acknowledge any possible retransmission from the peer.
*/
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: 50 ms wait on current channel before "
"starting persistent group");
os_sleep(0, 50000);
if (neg_freq > 0 && ssid->mode == WPAS_MODE_P2P_GO &&
freq_included(channels, neg_freq))
freq = neg_freq;
else if (peer_oper_freq > 0 && ssid->mode != WPAS_MODE_P2P_GO &&
freq_included(channels, peer_oper_freq))
freq = peer_oper_freq;
else
freq = 0;
wpa_printf(MSG_DEBUG, "P2P: Persistent group invitation success - op_freq=%d MHz SSID=%s",
freq, wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
wpas_p2p_group_add_persistent(wpa_s, ssid,
ssid->mode == WPAS_MODE_P2P_GO,
wpa_s->p2p_persistent_go_freq,
freq,
wpa_s->p2p_go_ht40, wpa_s->p2p_go_vht,
channels,
ssid->mode == WPAS_MODE_P2P_GO ?
P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE :
0);
}
static int wpas_p2p_disallowed_freq(struct wpa_global *global,
unsigned int freq)
{
if (freq_range_list_includes(&global->p2p_go_avoid_freq, freq))
return 1;
return freq_range_list_includes(&global->p2p_disallow_freq, freq);
}
static void wpas_p2p_add_chan(struct p2p_reg_class *reg, u8 chan)
{
reg->channel[reg->channels] = chan;
reg->channels++;
}
static int wpas_p2p_default_channels(struct wpa_supplicant *wpa_s,
struct p2p_channels *chan,
struct p2p_channels *cli_chan)
{
int i, cla = 0;
os_memset(cli_chan, 0, sizeof(*cli_chan));
wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for 2.4 GHz "
"band");
/* Operating class 81 - 2.4 GHz band channels 1..13 */
chan->reg_class[cla].reg_class = 81;
chan->reg_class[cla].channels = 0;
for (i = 0; i < 11; i++) {
if (!wpas_p2p_disallowed_freq(wpa_s->global, 2412 + i * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], i + 1);
}
if (chan->reg_class[cla].channels)
cla++;
wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for lower 5 GHz "
"band");
/* Operating class 115 - 5 GHz, channels 36-48 */
chan->reg_class[cla].reg_class = 115;
chan->reg_class[cla].channels = 0;
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 36 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 36);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 40 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 40);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 44 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 44);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 48 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 48);
if (chan->reg_class[cla].channels)
cla++;
wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for higher 5 GHz "
"band");
/* Operating class 124 - 5 GHz, channels 149,153,157,161 */
chan->reg_class[cla].reg_class = 124;
chan->reg_class[cla].channels = 0;
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 149 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 149);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 153 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 153);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 156 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 157);
if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 161 * 5))
wpas_p2p_add_chan(&chan->reg_class[cla], 161);
if (chan->reg_class[cla].channels)
cla++;
chan->reg_classes = cla;
return 0;
}
static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
u16 num_modes,
enum hostapd_hw_mode mode)
{
u16 i;
for (i = 0; i < num_modes; i++) {
if (modes[i].mode == mode)
return &modes[i];
}
return NULL;
}
enum chan_allowed {
NOT_ALLOWED, PASSIVE_ONLY, ALLOWED
};
static int has_channel(struct wpa_global *global,
struct hostapd_hw_modes *mode, u8 chan, int *flags)
{
int i;
unsigned int freq;
freq = (mode->mode == HOSTAPD_MODE_IEEE80211A ? 5000 : 2407) +
chan * 5;
if (wpas_p2p_disallowed_freq(global, freq))
return NOT_ALLOWED;
for (i = 0; i < mode->num_channels; i++) {
if (mode->channels[i].chan == chan) {
if (flags)
*flags = mode->channels[i].flag;
if (mode->channels[i].flag &
(HOSTAPD_CHAN_DISABLED |
HOSTAPD_CHAN_RADAR))
return NOT_ALLOWED;
if (mode->channels[i].flag &
(HOSTAPD_CHAN_PASSIVE_SCAN |
HOSTAPD_CHAN_NO_IBSS))
return PASSIVE_ONLY;
return ALLOWED;
}
}
return NOT_ALLOWED;
}
struct p2p_oper_class_map {
enum hostapd_hw_mode mode;
u8 op_class;
u8 min_chan;
u8 max_chan;
u8 inc;
enum { BW20, BW40PLUS, BW40MINUS, BW80 } bw;
};
static struct p2p_oper_class_map op_class[] = {
{ HOSTAPD_MODE_IEEE80211G, 81, 1, 13, 1, BW20 },
#if 0 /* Do not enable HT40 on 2 GHz for now */
{ HOSTAPD_MODE_IEEE80211G, 83, 1, 9, 1, BW40PLUS },
{ HOSTAPD_MODE_IEEE80211G, 84, 5, 13, 1, BW40MINUS },
#endif
{ HOSTAPD_MODE_IEEE80211A, 115, 36, 48, 4, BW20 },
{ HOSTAPD_MODE_IEEE80211A, 124, 149, 161, 4, BW20 },
{ HOSTAPD_MODE_IEEE80211A, 116, 36, 44, 8, BW40PLUS },
{ HOSTAPD_MODE_IEEE80211A, 117, 40, 48, 8, BW40MINUS },
{ HOSTAPD_MODE_IEEE80211A, 126, 149, 157, 8, BW40PLUS },
{ HOSTAPD_MODE_IEEE80211A, 127, 153, 161, 8, BW40MINUS },
/*
* IEEE P802.11ac/D7.0 Table E-4 actually talks about channel center
* frequency index 42, 58, 106, 122, 138, 155 with channel spacing of
* 80 MHz, but currently use the following definition for simplicity
* (these center frequencies are not actual channels, which makes
* has_channel() fail). wpas_p2p_verify_80mhz() should take care of
* removing invalid channels.
*/
{ HOSTAPD_MODE_IEEE80211A, 128, 36, 161, 4, BW80 },
{ -1, 0, 0, 0, 0, BW20 }
};
static int wpas_p2p_get_center_80mhz(struct wpa_supplicant *wpa_s,
struct hostapd_hw_modes *mode,
u8 channel)
{
u8 center_channels[] = { 42, 58, 106, 122, 138, 155 };
unsigned int i;
if (mode->mode != HOSTAPD_MODE_IEEE80211A)
return 0;
for (i = 0; i < ARRAY_SIZE(center_channels); i++)
/*
* In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48),
* so the center channel is 6 channels away from the start/end.
*/
if (channel >= center_channels[i] - 6 &&
channel <= center_channels[i] + 6)
return center_channels[i];
return 0;
}
static enum chan_allowed wpas_p2p_verify_80mhz(struct wpa_supplicant *wpa_s,
struct hostapd_hw_modes *mode,
u8 channel, u8 bw)
{
u8 center_chan;
int i, flags;
enum chan_allowed res, ret = ALLOWED;
center_chan = wpas_p2p_get_center_80mhz(wpa_s, mode, channel);
if (!center_chan)
return NOT_ALLOWED;
if (center_chan >= 58 && center_chan <= 138)
return NOT_ALLOWED; /* Do not allow DFS channels for P2P */
/* check all the channels are available */
for (i = 0; i < 4; i++) {
int adj_chan = center_chan - 6 + i * 4;
res = has_channel(wpa_s->global, mode, adj_chan, &flags);
if (res == NOT_ALLOWED)
return NOT_ALLOWED;
if (res == PASSIVE_ONLY)
ret = PASSIVE_ONLY;
if (i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_70))
return NOT_ALLOWED;
if (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_50))
return NOT_ALLOWED;
if (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_30))
return NOT_ALLOWED;
if (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_10))
return NOT_ALLOWED;
}
return ret;
}
static enum chan_allowed wpas_p2p_verify_channel(struct wpa_supplicant *wpa_s,
struct hostapd_hw_modes *mode,
u8 channel, u8 bw)
{
int flag = 0;
enum chan_allowed res, res2;
res2 = res = has_channel(wpa_s->global, mode, channel, &flag);
if (bw == BW40MINUS) {
if (!(flag & HOSTAPD_CHAN_HT40MINUS))
return NOT_ALLOWED;
res2 = has_channel(wpa_s->global, mode, channel - 4, NULL);
} else if (bw == BW40PLUS) {
if (!(flag & HOSTAPD_CHAN_HT40PLUS))
return NOT_ALLOWED;
res2 = has_channel(wpa_s->global, mode, channel + 4, NULL);
} else if (bw == BW80) {
res2 = wpas_p2p_verify_80mhz(wpa_s, mode, channel, bw);
}
if (res == NOT_ALLOWED || res2 == NOT_ALLOWED)
return NOT_ALLOWED;
if (res == PASSIVE_ONLY || res2 == PASSIVE_ONLY)
return PASSIVE_ONLY;
return res;
}
static int wpas_p2p_setup_channels(struct wpa_supplicant *wpa_s,
struct p2p_channels *chan,
struct p2p_channels *cli_chan)
{
struct hostapd_hw_modes *mode;
int cla, op, cli_cla;
if (wpa_s->hw.modes == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Driver did not support fetching "
"of all supported channels; assume dualband "
"support");
return wpas_p2p_default_channels(wpa_s, chan, cli_chan);
}
cla = cli_cla = 0;
for (op = 0; op_class[op].op_class; op++) {
struct p2p_oper_class_map *o = &op_class[op];
u8 ch;
struct p2p_reg_class *reg = NULL, *cli_reg = NULL;
mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, o->mode);
if (mode == NULL)
continue;
for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) {
enum chan_allowed res;
res = wpas_p2p_verify_channel(wpa_s, mode, ch, o->bw);
if (res == ALLOWED) {
if (reg == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Add operating class %u",
o->op_class);
reg = &chan->reg_class[cla];
cla++;
reg->reg_class = o->op_class;
}
reg->channel[reg->channels] = ch;
reg->channels++;
} else if (res == PASSIVE_ONLY &&
wpa_s->conf->p2p_add_cli_chan) {
if (cli_reg == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Add operating class %u (client only)",
o->op_class);
cli_reg = &cli_chan->reg_class[cli_cla];
cli_cla++;
cli_reg->reg_class = o->op_class;
}
cli_reg->channel[cli_reg->channels] = ch;
cli_reg->channels++;
}
}
if (reg) {
wpa_hexdump(MSG_DEBUG, "P2P: Channels",
reg->channel, reg->channels);
}
if (cli_reg) {
wpa_hexdump(MSG_DEBUG, "P2P: Channels (client only)",
cli_reg->channel, cli_reg->channels);
}
}
chan->reg_classes = cla;
cli_chan->reg_classes = cli_cla;
return 0;
}
int wpas_p2p_get_ht40_mode(struct wpa_supplicant *wpa_s,
struct hostapd_hw_modes *mode, u8 channel)
{
int op;
enum chan_allowed ret;
for (op = 0; op_class[op].op_class; op++) {
struct p2p_oper_class_map *o = &op_class[op];
u8 ch;
for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) {
if (o->mode != HOSTAPD_MODE_IEEE80211A ||
o->bw == BW20 || ch != channel)
continue;
ret = wpas_p2p_verify_channel(wpa_s, mode, ch, o->bw);
if (ret == ALLOWED)
return (o->bw == BW40MINUS) ? -1 : 1;
}
}
return 0;
}
int wpas_p2p_get_vht80_center(struct wpa_supplicant *wpa_s,
struct hostapd_hw_modes *mode, u8 channel)
{
if (!wpas_p2p_verify_channel(wpa_s, mode, channel, BW80))
return 0;
return wpas_p2p_get_center_80mhz(wpa_s, mode, channel);
}
static int wpas_get_noa(void *ctx, const u8 *interface_addr, u8 *buf,
size_t buf_len)
{
struct wpa_supplicant *wpa_s = ctx;
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (os_memcmp(wpa_s->own_addr, interface_addr, ETH_ALEN) == 0)
break;
}
if (wpa_s == NULL)
return -1;
return wpa_drv_get_noa(wpa_s, buf, buf_len);
}
struct wpa_supplicant * wpas_get_p2p_go_iface(struct wpa_supplicant *wpa_s,
const u8 *ssid, size_t ssid_len)
{
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
struct wpa_ssid *s = wpa_s->current_ssid;
if (s == NULL)
continue;
if (s->mode != WPAS_MODE_P2P_GO &&
s->mode != WPAS_MODE_AP &&
s->mode != WPAS_MODE_P2P_GROUP_FORMATION)
continue;
if (s->ssid_len != ssid_len ||
os_memcmp(ssid, s->ssid, ssid_len) != 0)
continue;
return wpa_s;
}
return NULL;
}
struct wpa_supplicant * wpas_get_p2p_client_iface(struct wpa_supplicant *wpa_s,
const u8 *peer_dev_addr)
{
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid == NULL)
continue;
if (ssid->mode != WPAS_MODE_INFRA)
continue;
if (wpa_s->wpa_state != WPA_COMPLETED &&
wpa_s->wpa_state != WPA_GROUP_HANDSHAKE)
continue;
if (os_memcmp(wpa_s->go_dev_addr, peer_dev_addr, ETH_ALEN) == 0)
return wpa_s;
}
return NULL;
}
static int wpas_go_connected(void *ctx, const u8 *dev_addr)
{
struct wpa_supplicant *wpa_s = ctx;
return wpas_get_p2p_client_iface(wpa_s, dev_addr) != NULL;
}
static int wpas_is_concurrent_session_active(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_supplicant *ifs;
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs == wpa_s)
continue;
if (ifs->wpa_state > WPA_ASSOCIATED)
return 1;
}
return 0;
}
static void wpas_p2p_debug_print(void *ctx, int level, const char *msg)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, level, "P2P: %s", msg);
}
int wpas_p2p_add_p2pdev_interface(struct wpa_supplicant *wpa_s)
{
struct wpa_interface iface;
struct wpa_supplicant *p2pdev_wpa_s;
char ifname[100];
char force_name[100];
int ret;
os_snprintf(ifname, sizeof(ifname), P2P_MGMT_DEVICE_PREFIX "%s",
wpa_s->ifname);
force_name[0] = '\0';
wpa_s->pending_interface_type = WPA_IF_P2P_DEVICE;
ret = wpa_drv_if_add(wpa_s, WPA_IF_P2P_DEVICE, ifname, NULL, NULL,
force_name, wpa_s->pending_interface_addr, NULL);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to create P2P Device interface");
return ret;
}
os_strlcpy(wpa_s->pending_interface_name, ifname,
sizeof(wpa_s->pending_interface_name));
os_memset(&iface, 0, sizeof(iface));
iface.p2p_mgmt = 1;
iface.ifname = wpa_s->pending_interface_name;
iface.driver = wpa_s->driver->name;
iface.driver_param = wpa_s->conf->driver_param;
/*
* If a P2P Device configuration file was given, use it as the interface
* configuration file (instead of using parent's configuration file.
*/
if (wpa_s->conf_p2p_dev) {
iface.confname = wpa_s->conf_p2p_dev;
iface.ctrl_interface = NULL;
} else {
iface.confname = wpa_s->confname;
iface.ctrl_interface = wpa_s->conf->ctrl_interface;
}
iface.conf_p2p_dev = NULL;
p2pdev_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface);
if (!p2pdev_wpa_s) {
wpa_printf(MSG_DEBUG, "P2P: Failed to add P2P Device interface");
return -1;
}
p2pdev_wpa_s->parent = wpa_s;
wpa_s->pending_interface_name[0] = '\0';
return 0;
}
static void wpas_presence_resp(void *ctx, const u8 *src, u8 status,
const u8 *noa, size_t noa_len)
{
struct wpa_supplicant *wpa_s, *intf = ctx;
char hex[100];
for (wpa_s = intf->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (wpa_s->waiting_presence_resp)
break;
}
if (!wpa_s) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No group interface was waiting for presence response");
return;
}
wpa_s->waiting_presence_resp = 0;
wpa_snprintf_hex(hex, sizeof(hex), noa, noa_len);
wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_PRESENCE_RESPONSE "src=" MACSTR
" status=%u noa=%s", MAC2STR(src), status, hex);
}
static int _wpas_p2p_in_progress(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
return wpas_p2p_in_progress(wpa_s);
}
/**
* wpas_p2p_init - Initialize P2P module for %wpa_supplicant
* @global: Pointer to global data from wpa_supplicant_init()
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* Returns: 0 on success, -1 on failure
*/
int wpas_p2p_init(struct wpa_global *global, struct wpa_supplicant *wpa_s)
{
struct p2p_config p2p;
unsigned int r;
int i;
if (wpa_s->conf->p2p_disabled)
return 0;
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
return 0;
if (global->p2p)
return 0;
os_memset(&p2p, 0, sizeof(p2p));
p2p.cb_ctx = wpa_s;
p2p.debug_print = wpas_p2p_debug_print;
p2p.p2p_scan = wpas_p2p_scan;
p2p.send_action = wpas_send_action;
p2p.send_action_done = wpas_send_action_done;
p2p.go_neg_completed = wpas_go_neg_completed;
p2p.go_neg_req_rx = wpas_go_neg_req_rx;
p2p.dev_found = wpas_dev_found;
p2p.dev_lost = wpas_dev_lost;
p2p.find_stopped = wpas_find_stopped;
p2p.start_listen = wpas_start_listen;
p2p.stop_listen = wpas_stop_listen;
p2p.send_probe_resp = wpas_send_probe_resp;
p2p.sd_request = wpas_sd_request;
p2p.sd_response = wpas_sd_response;
p2p.prov_disc_req = wpas_prov_disc_req;
p2p.prov_disc_resp = wpas_prov_disc_resp;
p2p.prov_disc_fail = wpas_prov_disc_fail;
p2p.invitation_process = wpas_invitation_process;
p2p.invitation_received = wpas_invitation_received;
p2p.invitation_result = wpas_invitation_result;
p2p.get_noa = wpas_get_noa;
p2p.go_connected = wpas_go_connected;
p2p.presence_resp = wpas_presence_resp;
p2p.is_concurrent_session_active = wpas_is_concurrent_session_active;
p2p.is_p2p_in_progress = _wpas_p2p_in_progress;
os_memcpy(wpa_s->global->p2p_dev_addr, wpa_s->own_addr, ETH_ALEN);
os_memcpy(p2p.dev_addr, wpa_s->global->p2p_dev_addr, ETH_ALEN);
p2p.dev_name = wpa_s->conf->device_name;
p2p.manufacturer = wpa_s->conf->manufacturer;
p2p.model_name = wpa_s->conf->model_name;
p2p.model_number = wpa_s->conf->model_number;
p2p.serial_number = wpa_s->conf->serial_number;
if (wpa_s->wps) {
os_memcpy(p2p.uuid, wpa_s->wps->uuid, 16);
p2p.config_methods = wpa_s->wps->config_methods;
}
if (wpa_s->conf->p2p_listen_reg_class &&
wpa_s->conf->p2p_listen_channel) {
p2p.reg_class = wpa_s->conf->p2p_listen_reg_class;
p2p.channel = wpa_s->conf->p2p_listen_channel;
p2p.channel_forced = 1;
} else {
p2p.reg_class = 81;
/*
* Pick one of the social channels randomly as the listen
* channel.
*/
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
return -1;
p2p.channel = 1 + (r % 3) * 5;
p2p.channel_forced = 0;
}
wpa_printf(MSG_DEBUG, "P2P: Own listen channel: %d", p2p.channel);
if (wpa_s->conf->p2p_oper_reg_class &&
wpa_s->conf->p2p_oper_channel) {
p2p.op_reg_class = wpa_s->conf->p2p_oper_reg_class;
p2p.op_channel = wpa_s->conf->p2p_oper_channel;
p2p.cfg_op_channel = 1;
wpa_printf(MSG_DEBUG, "P2P: Configured operating channel: "
"%d:%d", p2p.op_reg_class, p2p.op_channel);
} else {
p2p.op_reg_class = 81;
/*
* Use random operation channel from (1, 6, 11) if no other
* preference is indicated.
*/
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
return -1;
p2p.op_channel = 1 + (r % 3) * 5;
p2p.cfg_op_channel = 0;
wpa_printf(MSG_DEBUG, "P2P: Random operating channel: "
"%d:%d", p2p.op_reg_class, p2p.op_channel);
}
if (wpa_s->conf->p2p_pref_chan && wpa_s->conf->num_p2p_pref_chan) {
p2p.pref_chan = wpa_s->conf->p2p_pref_chan;
p2p.num_pref_chan = wpa_s->conf->num_p2p_pref_chan;
}
if (wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
os_memcpy(p2p.country, wpa_s->conf->country, 2);
p2p.country[2] = 0x04;
} else
os_memcpy(p2p.country, "XX\x04", 3);
if (wpas_p2p_setup_channels(wpa_s, &p2p.channels, &p2p.cli_channels)) {
wpa_printf(MSG_ERROR, "P2P: Failed to configure supported "
"channel list");
return -1;
}
os_memcpy(p2p.pri_dev_type, wpa_s->conf->device_type,
WPS_DEV_TYPE_LEN);
p2p.num_sec_dev_types = wpa_s->conf->num_sec_device_types;
os_memcpy(p2p.sec_dev_type, wpa_s->conf->sec_device_type,
p2p.num_sec_dev_types * WPS_DEV_TYPE_LEN);
p2p.concurrent_operations = !!(wpa_s->drv_flags &
WPA_DRIVER_FLAGS_P2P_CONCURRENT);
p2p.max_peers = 100;
if (wpa_s->conf->p2p_ssid_postfix) {
p2p.ssid_postfix_len =
os_strlen(wpa_s->conf->p2p_ssid_postfix);
if (p2p.ssid_postfix_len > sizeof(p2p.ssid_postfix))
p2p.ssid_postfix_len = sizeof(p2p.ssid_postfix);
os_memcpy(p2p.ssid_postfix, wpa_s->conf->p2p_ssid_postfix,
p2p.ssid_postfix_len);
}
p2p.p2p_intra_bss = wpa_s->conf->p2p_intra_bss;
p2p.max_listen = wpa_s->max_remain_on_chan;
if (wpa_s->conf->p2p_passphrase_len >= 8 &&
wpa_s->conf->p2p_passphrase_len <= 63)
p2p.passphrase_len = wpa_s->conf->p2p_passphrase_len;
else
p2p.passphrase_len = 8;
global->p2p = p2p_init(&p2p);
if (global->p2p == NULL)
return -1;
global->p2p_init_wpa_s = wpa_s;
for (i = 0; i < MAX_WPS_VENDOR_EXT; i++) {
if (wpa_s->conf->wps_vendor_ext[i] == NULL)
continue;
p2p_add_wps_vendor_extension(
global->p2p, wpa_s->conf->wps_vendor_ext[i]);
}
p2p_set_no_go_freq(global->p2p, &wpa_s->conf->p2p_no_go_freq);
return 0;
}
/**
* wpas_p2p_deinit - Deinitialize per-interface P2P data
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
*
* This function deinitialize per-interface P2P data.
*/
void wpas_p2p_deinit(struct wpa_supplicant *wpa_s)
{
if (wpa_s->driver && wpa_s->drv_priv)
wpa_drv_probe_req_report(wpa_s, 0);
if (wpa_s->go_params) {
/* Clear any stored provisioning info */
p2p_clear_provisioning_info(
wpa_s->global->p2p,
wpa_s->go_params->peer_device_addr);
}
os_free(wpa_s->go_params);
wpa_s->go_params = NULL;
eloop_cancel_timeout(wpas_p2p_psk_failure_removal, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL);
wpas_p2p_remove_pending_group_interface(wpa_s);
eloop_cancel_timeout(wpas_p2p_group_freq_conflict, wpa_s, NULL);
wpas_p2p_listen_work_done(wpa_s);
if (wpa_s->p2p_send_action_work) {
os_free(wpa_s->p2p_send_action_work->ctx);
radio_work_done(wpa_s->p2p_send_action_work);
wpa_s->p2p_send_action_work = NULL;
}
eloop_cancel_timeout(wpas_p2p_send_action_work_timeout, wpa_s, NULL);
wpabuf_free(wpa_s->p2p_oob_dev_pw);
wpa_s->p2p_oob_dev_pw = NULL;
/* TODO: remove group interface from the driver if this wpa_s instance
* is on top of a P2P group interface */
}
/**
* wpas_p2p_deinit_global - Deinitialize global P2P module
* @global: Pointer to global data from wpa_supplicant_init()
*
* This function deinitializes the global (per device) P2P module.
*/
static void wpas_p2p_deinit_global(struct wpa_global *global)
{
struct wpa_supplicant *wpa_s, *tmp;
wpa_s = global->ifaces;
wpas_p2p_service_flush(global->p2p_init_wpa_s);
/* Remove remaining P2P group interfaces */
while (wpa_s && wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE)
wpa_s = wpa_s->next;
while (wpa_s) {
tmp = global->ifaces;
while (tmp &&
(tmp == wpa_s ||
tmp->p2p_group_interface == NOT_P2P_GROUP_INTERFACE)) {
tmp = tmp->next;
}
if (tmp == NULL)
break;
/* Disconnect from the P2P group and deinit the interface */
wpas_p2p_disconnect(tmp);
}
/*
* Deinit GO data on any possibly remaining interface (if main
* interface is used as GO).
*/
for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (wpa_s->ap_iface)
wpas_p2p_group_deinit(wpa_s);
}
p2p_deinit(global->p2p);
global->p2p = NULL;
global->p2p_init_wpa_s = NULL;
}
static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s)
{
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE) &&
wpa_s->conf->p2p_no_group_iface)
return 0; /* separate interface disabled per configuration */
if (wpa_s->drv_flags &
(WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE |
WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P))
return 1; /* P2P group requires a new interface in every case
*/
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CONCURRENT))
return 0; /* driver does not support concurrent operations */
if (wpa_s->global->ifaces->next)
return 1; /* more that one interface already in use */
if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
return 1; /* this interface is already in use */
return 0;
}
static int wpas_p2p_start_go_neg(struct wpa_supplicant *wpa_s,
const u8 *peer_addr,
enum p2p_wps_method wps_method,
int go_intent, const u8 *own_interface_addr,
unsigned int force_freq, int persistent_group,
struct wpa_ssid *ssid, unsigned int pref_freq)
{
if (persistent_group && wpa_s->conf->persistent_reconnect)
persistent_group = 2;
/*
* Increase GO config timeout if HT40 is used since it takes some time
* to scan channels for coex purposes before the BSS can be started.
*/
p2p_set_config_timeout(wpa_s->global->p2p,
wpa_s->p2p_go_ht40 ? 255 : 100, 20);
return p2p_connect(wpa_s->global->p2p, peer_addr, wps_method,
go_intent, own_interface_addr, force_freq,
persistent_group, ssid ? ssid->ssid : NULL,
ssid ? ssid->ssid_len : 0,
wpa_s->p2p_pd_before_go_neg, pref_freq,
wps_method == WPS_NFC ? wpa_s->p2p_oob_dev_pw_id :
0);
}
static int wpas_p2p_auth_go_neg(struct wpa_supplicant *wpa_s,
const u8 *peer_addr,
enum p2p_wps_method wps_method,
int go_intent, const u8 *own_interface_addr,
unsigned int force_freq, int persistent_group,
struct wpa_ssid *ssid, unsigned int pref_freq)
{
if (persistent_group && wpa_s->conf->persistent_reconnect)
persistent_group = 2;
return p2p_authorize(wpa_s->global->p2p, peer_addr, wps_method,
go_intent, own_interface_addr, force_freq,
persistent_group, ssid ? ssid->ssid : NULL,
ssid ? ssid->ssid_len : 0, pref_freq,
wps_method == WPS_NFC ? wpa_s->p2p_oob_dev_pw_id :
0);
}
static void wpas_p2p_check_join_scan_limit(struct wpa_supplicant *wpa_s)
{
wpa_s->p2p_join_scan_count++;
wpa_printf(MSG_DEBUG, "P2P: Join scan attempt %d",
wpa_s->p2p_join_scan_count);
if (wpa_s->p2p_join_scan_count > P2P_MAX_JOIN_SCAN_ATTEMPTS) {
wpa_printf(MSG_DEBUG, "P2P: Failed to find GO " MACSTR
" for join operationg - stop join attempt",
MAC2STR(wpa_s->pending_join_iface_addr));
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
if (wpa_s->p2p_auto_pd) {
wpa_s->p2p_auto_pd = 0;
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_PROV_DISC_FAILURE
" p2p_dev_addr=" MACSTR " status=N/A",
MAC2STR(wpa_s->pending_join_dev_addr));
return;
}
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_FAILURE);
}
}
static int wpas_check_freq_conflict(struct wpa_supplicant *wpa_s, int freq)
{
int res;
unsigned int num, i;
struct wpa_used_freq_data *freqs;
if (wpas_p2p_num_unused_channels(wpa_s) > 0) {
/* Multiple channels are supported and not all are in use */
return 0;
}
freqs = os_calloc(wpa_s->num_multichan_concurrent,
sizeof(struct wpa_used_freq_data));
if (!freqs)
return 1;
num = wpas_p2p_valid_oper_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
for (i = 0; i < num; i++) {
if (freqs[i].freq == freq) {
wpa_printf(MSG_DEBUG, "P2P: Frequency %d MHz in use by another virtual interface and can be used",
freq);
res = 0;
goto exit_free;
}
}
wpa_printf(MSG_DEBUG, "P2P: No valid operating frequencies");
res = 1;
exit_free:
os_free(freqs);
return res;
}
static int wpas_p2p_peer_go(struct wpa_supplicant *wpa_s,
const u8 *peer_dev_addr)
{
struct wpa_bss *bss;
int updated;
bss = wpa_bss_get_p2p_dev_addr(wpa_s, peer_dev_addr);
if (bss == NULL)
return -1;
if (bss->last_update_idx < wpa_s->bss_update_idx) {
wpa_printf(MSG_DEBUG, "P2P: Peer BSS entry not updated in the "
"last scan");
return 0;
}
updated = os_reltime_before(&wpa_s->p2p_auto_started,
&bss->last_update);
wpa_printf(MSG_DEBUG, "P2P: Current BSS entry for peer updated at "
"%ld.%06ld (%supdated in last scan)",
bss->last_update.sec, bss->last_update.usec,
updated ? "": "not ");
return updated;
}
static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
struct wpa_bss *bss = NULL;
int freq;
u8 iface_addr[ETH_ALEN];
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
if (wpa_s->global->p2p_disabled)
return;
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS) for %sjoin",
scan_res ? (int) scan_res->num : -1,
wpa_s->p2p_auto_join ? "auto_" : "");
if (scan_res)
wpas_p2p_scan_res_handler(wpa_s, scan_res);
if (wpa_s->p2p_auto_pd) {
int join = wpas_p2p_peer_go(wpa_s,
wpa_s->pending_join_dev_addr);
if (join == 0 &&
wpa_s->auto_pd_scan_retry < P2P_AUTO_PD_SCAN_ATTEMPTS) {
wpa_s->auto_pd_scan_retry++;
bss = wpa_bss_get_bssid_latest(
wpa_s, wpa_s->pending_join_dev_addr);
if (bss) {
freq = bss->freq;
wpa_printf(MSG_DEBUG, "P2P: Scan retry %d for "
"the peer " MACSTR " at %d MHz",
wpa_s->auto_pd_scan_retry,
MAC2STR(wpa_s->
pending_join_dev_addr),
freq);
wpas_p2p_join_scan_req(wpa_s, freq, NULL, 0);
return;
}
}
if (join < 0)
join = 0;
wpa_s->p2p_auto_pd = 0;
wpa_s->pending_pd_use = join ? AUTO_PD_JOIN : AUTO_PD_GO_NEG;
wpa_printf(MSG_DEBUG, "P2P: Auto PD with " MACSTR " join=%d",
MAC2STR(wpa_s->pending_join_dev_addr), join);
if (p2p_prov_disc_req(wpa_s->global->p2p,
wpa_s->pending_join_dev_addr,
wpa_s->pending_pd_config_methods, join,
0, wpa_s->user_initiated_pd) < 0) {
wpa_s->p2p_auto_pd = 0;
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_PROV_DISC_FAILURE
" p2p_dev_addr=" MACSTR " status=N/A",
MAC2STR(wpa_s->pending_join_dev_addr));
}
return;
}
if (wpa_s->p2p_auto_join) {
int join = wpas_p2p_peer_go(wpa_s,
wpa_s->pending_join_dev_addr);
if (join < 0) {
wpa_printf(MSG_DEBUG, "P2P: Peer was not found to be "
"running a GO -> use GO Negotiation");
wpas_p2p_connect(wpa_s, wpa_s->pending_join_dev_addr,
wpa_s->p2p_pin, wpa_s->p2p_wps_method,
wpa_s->p2p_persistent_group, 0, 0, 0,
wpa_s->p2p_go_intent,
wpa_s->p2p_connect_freq,
wpa_s->p2p_persistent_id,
wpa_s->p2p_pd_before_go_neg,
wpa_s->p2p_go_ht40,
wpa_s->p2p_go_vht);
return;
}
wpa_printf(MSG_DEBUG, "P2P: Peer was found running GO%s -> "
"try to join the group", join ? "" :
" in older scan");
if (!join)
wpa_s->p2p_fallback_to_go_neg = 1;
}
freq = p2p_get_oper_freq(wpa_s->global->p2p,
wpa_s->pending_join_iface_addr);
if (freq < 0 &&
p2p_get_interface_addr(wpa_s->global->p2p,
wpa_s->pending_join_dev_addr,
iface_addr) == 0 &&
os_memcmp(iface_addr, wpa_s->pending_join_dev_addr, ETH_ALEN) != 0
&& !wpa_bss_get_bssid(wpa_s, wpa_s->pending_join_iface_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Overwrite pending interface "
"address for join from " MACSTR " to " MACSTR
" based on newly discovered P2P peer entry",
MAC2STR(wpa_s->pending_join_iface_addr),
MAC2STR(iface_addr));
os_memcpy(wpa_s->pending_join_iface_addr, iface_addr,
ETH_ALEN);
freq = p2p_get_oper_freq(wpa_s->global->p2p,
wpa_s->pending_join_iface_addr);
}
if (freq >= 0) {
wpa_printf(MSG_DEBUG, "P2P: Target GO operating frequency "
"from P2P peer table: %d MHz", freq);
}
if (wpa_s->p2p_join_ssid_len) {
wpa_printf(MSG_DEBUG, "P2P: Trying to find target GO BSS entry based on BSSID "
MACSTR " and SSID %s",
MAC2STR(wpa_s->pending_join_iface_addr),
wpa_ssid_txt(wpa_s->p2p_join_ssid,
wpa_s->p2p_join_ssid_len));
bss = wpa_bss_get(wpa_s, wpa_s->pending_join_iface_addr,
wpa_s->p2p_join_ssid,
wpa_s->p2p_join_ssid_len);
}
if (!bss) {
wpa_printf(MSG_DEBUG, "P2P: Trying to find target GO BSS entry based on BSSID "
MACSTR, MAC2STR(wpa_s->pending_join_iface_addr));
bss = wpa_bss_get_bssid_latest(wpa_s,
wpa_s->pending_join_iface_addr);
}
if (bss) {
freq = bss->freq;
wpa_printf(MSG_DEBUG, "P2P: Target GO operating frequency "
"from BSS table: %d MHz (SSID %s)", freq,
wpa_ssid_txt(bss->ssid, bss->ssid_len));
}
if (freq > 0) {
u16 method;
if (wpas_check_freq_conflict(wpa_s, freq) > 0) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_FAILURE
"reason=FREQ_CONFLICT");
return;
}
wpa_printf(MSG_DEBUG, "P2P: Send Provision Discovery Request "
"prior to joining an existing group (GO " MACSTR
" freq=%u MHz)",
MAC2STR(wpa_s->pending_join_dev_addr), freq);
wpa_s->pending_pd_before_join = 1;
switch (wpa_s->pending_join_wps_method) {
case WPS_PIN_DISPLAY:
method = WPS_CONFIG_KEYPAD;
break;
case WPS_PIN_KEYPAD:
method = WPS_CONFIG_DISPLAY;
break;
case WPS_PBC:
method = WPS_CONFIG_PUSHBUTTON;
break;
default:
method = 0;
break;
}
if ((p2p_get_provisioning_info(wpa_s->global->p2p,
wpa_s->pending_join_dev_addr) ==
method)) {
/*
* We have already performed provision discovery for
* joining the group. Proceed directly to join
* operation without duplicated provision discovery. */
wpa_printf(MSG_DEBUG, "P2P: Provision discovery "
"with " MACSTR " already done - proceed to "
"join",
MAC2STR(wpa_s->pending_join_dev_addr));
wpa_s->pending_pd_before_join = 0;
goto start;
}
if (p2p_prov_disc_req(wpa_s->global->p2p,
wpa_s->pending_join_dev_addr, method, 1,
freq, wpa_s->user_initiated_pd) < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to send Provision "
"Discovery Request before joining an "
"existing group");
wpa_s->pending_pd_before_join = 0;
goto start;
}
return;
}
wpa_printf(MSG_DEBUG, "P2P: Failed to find BSS/GO - try again later");
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
eloop_register_timeout(1, 0, wpas_p2p_join_scan, wpa_s, NULL);
wpas_p2p_check_join_scan_limit(wpa_s);
return;
start:
/* Start join operation immediately */
wpas_p2p_join_start(wpa_s, 0, NULL, 0);
}
static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq,
const u8 *ssid, size_t ssid_len)
{
int ret;
struct wpa_driver_scan_params params;
struct wpabuf *wps_ie, *ies;
size_t ielen;
int freqs[2] = { 0, 0 };
os_memset(&params, 0, sizeof(params));
/* P2P Wildcard SSID */
params.num_ssids = 1;
if (ssid && ssid_len) {
params.ssids[0].ssid = ssid;
params.ssids[0].ssid_len = ssid_len;
os_memcpy(wpa_s->p2p_join_ssid, ssid, ssid_len);
wpa_s->p2p_join_ssid_len = ssid_len;
} else {
params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID;
params.ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN;
wpa_s->p2p_join_ssid_len = 0;
}
wpa_s->wps->dev.p2p = 1;
wps_ie = wps_build_probe_req_ie(DEV_PW_DEFAULT, &wpa_s->wps->dev,
wpa_s->wps->uuid, WPS_REQ_ENROLLEE, 0,
NULL);
if (wps_ie == NULL) {
wpas_p2p_scan_res_join(wpa_s, NULL);
return;
}
ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
ies = wpabuf_alloc(wpabuf_len(wps_ie) + ielen);
if (ies == NULL) {
wpabuf_free(wps_ie);
wpas_p2p_scan_res_join(wpa_s, NULL);
return;
}
wpabuf_put_buf(ies, wps_ie);
wpabuf_free(wps_ie);
p2p_scan_ie(wpa_s->global->p2p, ies, NULL);
params.p2p_probe = 1;
params.extra_ies = wpabuf_head(ies);
params.extra_ies_len = wpabuf_len(ies);
if (!freq) {
int oper_freq;
/*
* If freq is not provided, check the operating freq of the GO
* and use a single channel scan on if possible.
*/
oper_freq = p2p_get_oper_freq(wpa_s->global->p2p,
wpa_s->pending_join_iface_addr);
if (oper_freq > 0)
freq = oper_freq;
}
if (freq > 0) {
freqs[0] = freq;
params.freqs = freqs;
}
/*
* Run a scan to update BSS table and start Provision Discovery once
* the new scan results become available.
*/
ret = wpa_drv_scan(wpa_s, &params);
if (!ret) {
os_get_reltime(&wpa_s->scan_trigger_time);
wpa_s->scan_res_handler = wpas_p2p_scan_res_join;
wpa_s->own_scan_requested = 1;
}
wpabuf_free(ies);
if (ret) {
wpa_printf(MSG_DEBUG, "P2P: Failed to start scan for join - "
"try again later");
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
eloop_register_timeout(1, 0, wpas_p2p_join_scan, wpa_s, NULL);
wpas_p2p_check_join_scan_limit(wpa_s);
}
}
static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpas_p2p_join_scan_req(wpa_s, 0, NULL, 0);
}
static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
const u8 *dev_addr, enum p2p_wps_method wps_method,
int auto_join, int op_freq,
const u8 *ssid, size_t ssid_len)
{
wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface "
MACSTR " dev " MACSTR " op_freq=%d)%s",
MAC2STR(iface_addr), MAC2STR(dev_addr), op_freq,
auto_join ? " (auto_join)" : "");
if (ssid && ssid_len) {
wpa_printf(MSG_DEBUG, "P2P: Group SSID specified: %s",
wpa_ssid_txt(ssid, ssid_len));
}
wpa_s->p2p_auto_pd = 0;
wpa_s->p2p_auto_join = !!auto_join;
os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN);
os_memcpy(wpa_s->pending_join_dev_addr, dev_addr, ETH_ALEN);
wpa_s->pending_join_wps_method = wps_method;
/* Make sure we are not running find during connection establishment */
wpas_p2p_stop_find(wpa_s);
wpa_s->p2p_join_scan_count = 0;
wpas_p2p_join_scan_req(wpa_s, op_freq, ssid, ssid_len);
return 0;
}
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s, int freq,
const u8 *ssid, size_t ssid_len)
{
struct wpa_supplicant *group;
struct p2p_go_neg_results res;
struct wpa_bss *bss;
group = wpas_p2p_get_group_iface(wpa_s, 0, 0);
if (group == NULL)
return -1;
if (group != wpa_s) {
os_memcpy(group->p2p_pin, wpa_s->p2p_pin,
sizeof(group->p2p_pin));
group->p2p_wps_method = wpa_s->p2p_wps_method;
} else {
/*
* Need to mark the current interface for p2p_group_formation
* when a separate group interface is not used. This is needed
* to allow p2p_cancel stop a pending p2p_connect-join.
* wpas_p2p_init_group_interface() addresses this for the case
* where a separate group interface is used.
*/
wpa_s->global->p2p_group_formation = wpa_s;
}
group->p2p_in_provisioning = 1;
group->p2p_fallback_to_go_neg = wpa_s->p2p_fallback_to_go_neg;
os_memset(&res, 0, sizeof(res));
os_memcpy(res.peer_device_addr, wpa_s->pending_join_dev_addr, ETH_ALEN);
os_memcpy(res.peer_interface_addr, wpa_s->pending_join_iface_addr,
ETH_ALEN);
res.wps_method = wpa_s->pending_join_wps_method;
if (freq && ssid && ssid_len) {
res.freq = freq;
res.ssid_len = ssid_len;
os_memcpy(res.ssid, ssid, ssid_len);
} else {
bss = wpa_bss_get_bssid_latest(wpa_s,
wpa_s->pending_join_iface_addr);
if (bss) {
res.freq = bss->freq;
res.ssid_len = bss->ssid_len;
os_memcpy(res.ssid, bss->ssid, bss->ssid_len);
wpa_printf(MSG_DEBUG, "P2P: Join target GO operating frequency from BSS table: %d MHz (SSID %s)",
bss->freq,
wpa_ssid_txt(bss->ssid, bss->ssid_len));
}
}
if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
wpa_printf(MSG_DEBUG, "P2P: Cancel remain-on-channel prior to "
"starting client");
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = 0;
}
wpas_start_wps_enrollee(group, &res);
/*
* Allow a longer timeout for join-a-running-group than normal 15
* second group formation timeout since the GO may not have authorized
* our connection yet.
*/
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL);
eloop_register_timeout(60, 0, wpas_p2p_group_formation_timeout,
wpa_s, NULL);
return 0;
}
static int wpas_p2p_setup_freqs(struct wpa_supplicant *wpa_s, int freq,
int *force_freq, int *pref_freq, int go)
{
struct wpa_used_freq_data *freqs;
int res, best_freq, num_unused;
unsigned int freq_in_use = 0, num, i;
freqs = os_calloc(wpa_s->num_multichan_concurrent,
sizeof(struct wpa_used_freq_data));
if (!freqs)
return -1;
num = wpas_p2p_valid_oper_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
/*
* It is possible that the total number of used frequencies is bigger
* than the number of frequencies used for P2P, so get the system wide
* number of unused frequencies.
*/
num_unused = wpas_p2p_num_unused_channels(wpa_s);
wpa_printf(MSG_DEBUG,
"P2P: Setup freqs: freq=%d num_MCC=%d shared_freqs=%u num_unused=%d",
freq, wpa_s->num_multichan_concurrent, num, num_unused);
if (freq > 0) {
int ret;
if (go)
ret = p2p_supported_freq(wpa_s->global->p2p, freq);
else
ret = p2p_supported_freq_cli(wpa_s->global->p2p, freq);
if (!ret) {
wpa_printf(MSG_DEBUG, "P2P: The forced channel "
"(%u MHz) is not supported for P2P uses",
freq);
res = -3;
goto exit_free;
}
for (i = 0; i < num; i++) {
if (freqs[i].freq == freq)
freq_in_use = 1;
}
if (num_unused <= 0 && !freq_in_use) {
wpa_printf(MSG_DEBUG, "P2P: Cannot start P2P group on %u MHz as there are no available channels",
freq);
res = -2;
goto exit_free;
}
wpa_printf(MSG_DEBUG, "P2P: Trying to force us to use the "
"requested channel (%u MHz)", freq);
*force_freq = freq;
goto exit_ok;
}
best_freq = wpas_p2p_pick_best_used_freq(wpa_s, freqs, num);
/* We have a candidate frequency to use */
if (best_freq > 0) {
if (*pref_freq == 0 && num_unused > 0) {
wpa_printf(MSG_DEBUG, "P2P: Try to prefer a frequency (%u MHz) we are already using",
best_freq);
*pref_freq = best_freq;
} else {
wpa_printf(MSG_DEBUG, "P2P: Try to force us to use frequency (%u MHz) which is already in use",
best_freq);
*force_freq = best_freq;
}
} else if (num_unused > 0) {
wpa_printf(MSG_DEBUG,
"P2P: Current operating channels are not available for P2P. Try to use another channel");
*force_freq = 0;
} else {
wpa_printf(MSG_DEBUG,
"P2P: All channels are in use and none of them are P2P enabled. Cannot start P2P group");
res = -2;
goto exit_free;
}
exit_ok:
res = 0;
exit_free:
os_free(freqs);
return res;
}
/**
* wpas_p2p_connect - Request P2P Group Formation to be started
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* @peer_addr: Address of the peer P2P Device
* @pin: PIN to use during provisioning or %NULL to indicate PBC mode
* @persistent_group: Whether to create a persistent group
* @auto_join: Whether to select join vs. GO Negotiation automatically
* @join: Whether to join an existing group (as a client) instead of starting
* Group Owner negotiation; @peer_addr is BSSID in that case
* @auth: Whether to only authorize the connection instead of doing that and
* initiating Group Owner negotiation
* @go_intent: GO Intent or -1 to use default
* @freq: Frequency for the group or 0 for auto-selection
* @persistent_id: Persistent group credentials to use for forcing GO
* parameters or -1 to generate new values (SSID/passphrase)
* @pd: Whether to send Provision Discovery prior to GO Negotiation as an
* interoperability workaround when initiating group formation
* @ht40: Start GO with 40 MHz channel width
* @vht: Start GO with VHT support
* Returns: 0 or new PIN (if pin was %NULL) on success, -1 on unspecified
* failure, -2 on failure due to channel not currently available,
* -3 if forced channel is not supported
*/
int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
const char *pin, enum p2p_wps_method wps_method,
int persistent_group, int auto_join, int join, int auth,
int go_intent, int freq, int persistent_id, int pd,
int ht40, int vht)
{
int force_freq = 0, pref_freq = 0;
int ret = 0, res;
enum wpa_driver_if_type iftype;
const u8 *if_addr;
struct wpa_ssid *ssid = NULL;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
if (persistent_id >= 0) {
ssid = wpa_config_get_network(wpa_s->conf, persistent_id);
if (ssid == NULL || ssid->disabled != 2 ||
ssid->mode != WPAS_MODE_P2P_GO)
return -1;
}
os_free(wpa_s->global->add_psk);
wpa_s->global->add_psk = NULL;
wpa_s->global->p2p_fail_on_wps_complete = 0;
if (go_intent < 0)
go_intent = wpa_s->conf->p2p_go_intent;
if (!auth)
wpa_s->p2p_long_listen = 0;
wpa_s->p2p_wps_method = wps_method;
wpa_s->p2p_persistent_group = !!persistent_group;
wpa_s->p2p_persistent_id = persistent_id;
wpa_s->p2p_go_intent = go_intent;
wpa_s->p2p_connect_freq = freq;
wpa_s->p2p_fallback_to_go_neg = 0;
wpa_s->p2p_pd_before_go_neg = !!pd;
wpa_s->p2p_go_ht40 = !!ht40;
wpa_s->p2p_go_vht = !!vht;
if (pin)
os_strlcpy(wpa_s->p2p_pin, pin, sizeof(wpa_s->p2p_pin));
else if (wps_method == WPS_PIN_DISPLAY) {
ret = wps_generate_pin();
os_snprintf(wpa_s->p2p_pin, sizeof(wpa_s->p2p_pin), "%08d",
ret);
wpa_printf(MSG_DEBUG, "P2P: Randomly generated PIN: %s",
wpa_s->p2p_pin);
} else
wpa_s->p2p_pin[0] = '\0';
if (join || auto_join) {
u8 iface_addr[ETH_ALEN], dev_addr[ETH_ALEN];
if (auth) {
wpa_printf(MSG_DEBUG, "P2P: Authorize invitation to "
"connect a running group from " MACSTR,
MAC2STR(peer_addr));
os_memcpy(wpa_s->p2p_auth_invite, peer_addr, ETH_ALEN);
return ret;
}
os_memcpy(dev_addr, peer_addr, ETH_ALEN);
if (p2p_get_interface_addr(wpa_s->global->p2p, peer_addr,
iface_addr) < 0) {
os_memcpy(iface_addr, peer_addr, ETH_ALEN);
p2p_get_dev_addr(wpa_s->global->p2p, peer_addr,
dev_addr);
}
if (auto_join) {
os_get_reltime(&wpa_s->p2p_auto_started);
wpa_printf(MSG_DEBUG, "P2P: Auto join started at "
"%ld.%06ld",
wpa_s->p2p_auto_started.sec,
wpa_s->p2p_auto_started.usec);
}
wpa_s->user_initiated_pd = 1;
if (wpas_p2p_join(wpa_s, iface_addr, dev_addr, wps_method,
auto_join, freq, NULL, 0) < 0)
return -1;
return ret;
}
res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq,
go_intent == 15);
if (res)
return res;
wpas_p2p_set_own_freq_preference(wpa_s,
force_freq ? force_freq : pref_freq);
wpa_s->create_p2p_iface = wpas_p2p_create_iface(wpa_s);
if (wpa_s->create_p2p_iface) {
/* Prepare to add a new interface for the group */
iftype = WPA_IF_P2P_GROUP;
if (go_intent == 15)
iftype = WPA_IF_P2P_GO;
if (wpas_p2p_add_group_interface(wpa_s, iftype) < 0) {
wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new "
"interface for the group");
return -1;
}
if_addr = wpa_s->pending_interface_addr;
} else
if_addr = wpa_s->own_addr;
if (auth) {
if (wpas_p2p_auth_go_neg(wpa_s, peer_addr, wps_method,
go_intent, if_addr,
force_freq, persistent_group, ssid,
pref_freq) < 0)
return -1;
return ret;
}
if (wpas_p2p_start_go_neg(wpa_s, peer_addr, wps_method,
go_intent, if_addr, force_freq,
persistent_group, ssid, pref_freq) < 0) {
if (wpa_s->create_p2p_iface)
wpas_p2p_remove_pending_group_interface(wpa_s);
return -1;
}
return ret;
}
/**
* wpas_p2p_remain_on_channel_cb - Indication of remain-on-channel start
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* @freq: Frequency of the channel in MHz
* @duration: Duration of the stay on the channel in milliseconds
*
* This callback is called when the driver indicates that it has started the
* requested remain-on-channel duration.
*/
void wpas_p2p_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq, unsigned int duration)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (wpa_s->off_channel_freq == wpa_s->pending_listen_freq) {
p2p_listen_cb(wpa_s->global->p2p, wpa_s->pending_listen_freq,
wpa_s->pending_listen_duration);
wpa_s->pending_listen_freq = 0;
} else {
wpa_printf(MSG_DEBUG, "P2P: Ignore remain-on-channel callback (off_channel_freq=%u pending_listen_freq=%d freq=%u duration=%u)",
wpa_s->off_channel_freq, wpa_s->pending_listen_freq,
freq, duration);
}
}
static int wpas_p2p_listen_start(struct wpa_supplicant *wpa_s,
unsigned int timeout)
{
/* Limit maximum Listen state time based on driver limitation. */
if (timeout > wpa_s->max_remain_on_chan)
timeout = wpa_s->max_remain_on_chan;
return p2p_listen(wpa_s->global->p2p, timeout);
}
/**
* wpas_p2p_cancel_remain_on_channel_cb - Remain-on-channel timeout
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* @freq: Frequency of the channel in MHz
*
* This callback is called when the driver indicates that a remain-on-channel
* operation has been completed, i.e., the duration on the requested channel
* has timed out.
*/
void wpas_p2p_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq)
{
wpa_printf(MSG_DEBUG, "P2P: Cancel remain-on-channel callback "
"(p2p_long_listen=%d ms pending_action_tx=%p)",
wpa_s->p2p_long_listen, offchannel_pending_action_tx(wpa_s));
wpas_p2p_listen_work_done(wpa_s);
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (p2p_listen_end(wpa_s->global->p2p, freq) > 0)
return; /* P2P module started a new operation */
if (offchannel_pending_action_tx(wpa_s))
return;
if (wpa_s->p2p_long_listen > 0)
wpa_s->p2p_long_listen -= wpa_s->max_remain_on_chan;
if (wpa_s->p2p_long_listen > 0) {
wpa_printf(MSG_DEBUG, "P2P: Continuing long Listen state");
wpas_p2p_listen_start(wpa_s, wpa_s->p2p_long_listen);
} else {
/*
* When listen duration is over, stop listen & update p2p_state
* to IDLE.
*/
p2p_stop_listen(wpa_s->global->p2p);
}
}
/**
* wpas_p2p_group_remove - Remove a P2P group
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* @ifname: Network interface name of the group interface or "*" to remove all
* groups
* Returns: 0 on success, -1 on failure
*
* This function is used to remove a P2P group. This can be used to disconnect
* from a group in which the local end is a P2P Client or to end a P2P Group in
* case the local end is the Group Owner. If a virtual network interface was
* created for this group, that interface will be removed. Otherwise, only the
* configured P2P group network will be removed from the interface.
*/
int wpas_p2p_group_remove(struct wpa_supplicant *wpa_s, const char *ifname)
{
struct wpa_global *global = wpa_s->global;
if (os_strcmp(ifname, "*") == 0) {
struct wpa_supplicant *prev;
wpa_s = global->ifaces;
while (wpa_s) {
prev = wpa_s;
wpa_s = wpa_s->next;
if (prev->p2p_group_interface !=
NOT_P2P_GROUP_INTERFACE ||
(prev->current_ssid &&
prev->current_ssid->p2p_group))
wpas_p2p_disconnect(prev);
}
return 0;
}
for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (os_strcmp(wpa_s->ifname, ifname) == 0)
break;
}
return wpas_p2p_disconnect(wpa_s);
}
static int wpas_p2p_select_go_freq(struct wpa_supplicant *wpa_s, int freq)
{
unsigned int r;
if (freq == 2) {
wpa_printf(MSG_DEBUG, "P2P: Request to start GO on 2.4 GHz "
"band");
if (wpa_s->best_24_freq > 0 &&
p2p_supported_freq_go(wpa_s->global->p2p,
wpa_s->best_24_freq)) {
freq = wpa_s->best_24_freq;
wpa_printf(MSG_DEBUG, "P2P: Use best 2.4 GHz band "
"channel: %d MHz", freq);
} else {
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
return -1;
freq = 2412 + (r % 3) * 25;
wpa_printf(MSG_DEBUG, "P2P: Use random 2.4 GHz band "
"channel: %d MHz", freq);
}
}
if (freq == 5) {
wpa_printf(MSG_DEBUG, "P2P: Request to start GO on 5 GHz "
"band");
if (wpa_s->best_5_freq > 0 &&
p2p_supported_freq_go(wpa_s->global->p2p,
wpa_s->best_5_freq)) {
freq = wpa_s->best_5_freq;
wpa_printf(MSG_DEBUG, "P2P: Use best 5 GHz band "
"channel: %d MHz", freq);
} else {
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
return -1;
freq = 5180 + (r % 4) * 20;
if (!p2p_supported_freq_go(wpa_s->global->p2p, freq)) {
wpa_printf(MSG_DEBUG, "P2P: Could not select "
"5 GHz channel for P2P group");
return -1;
}
wpa_printf(MSG_DEBUG, "P2P: Use random 5 GHz band "
"channel: %d MHz", freq);
}
}
if (freq > 0 && !p2p_supported_freq_go(wpa_s->global->p2p, freq)) {
wpa_printf(MSG_DEBUG, "P2P: The forced channel for GO "
"(%u MHz) is not supported for P2P uses",
freq);
return -1;
}
return freq;
}
static int wpas_p2p_select_freq_no_pref(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params,
const struct p2p_channels *channels)
{
unsigned int i, r;
/* first try some random selection of the social channels */
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
return -1;
for (i = 0; i < 3; i++) {
params->freq = 2412 + ((r + i) % 3) * 25;
if (!wpas_p2p_disallowed_freq(wpa_s->global, params->freq) &&
freq_included(channels, params->freq))
goto out;
}
/* try all channels in reg. class 81 */
for (i = 0; i < 11; i++) {
params->freq = 2412 + i * 5;
if (!wpas_p2p_disallowed_freq(wpa_s->global, params->freq) &&
freq_included(channels, params->freq))
goto out;
}
wpa_printf(MSG_DEBUG, "P2P: No 2.4 GHz channel allowed");
return -1;
out:
wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz (no preference known)",
params->freq);
return 0;
}
static int wpas_p2p_init_go_params(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params,
int freq, int ht40, int vht,
const struct p2p_channels *channels)
{
struct wpa_used_freq_data *freqs;
unsigned int pref_freq, cand_freq;
unsigned int num, i;
os_memset(params, 0, sizeof(*params));
params->role_go = 1;
params->ht40 = ht40;
params->vht = vht;
if (freq) {
if (!freq_included(channels, freq)) {
wpa_printf(MSG_DEBUG, "P2P: Forced GO freq %d MHz not "
"accepted", freq);
return -1;
}
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on forced "
"frequency %d MHz", freq);
params->freq = freq;
} else if (wpa_s->conf->p2p_oper_reg_class == 81 &&
wpa_s->conf->p2p_oper_channel >= 1 &&
wpa_s->conf->p2p_oper_channel <= 11 &&
freq_included(channels,
2407 + 5 * wpa_s->conf->p2p_oper_channel)) {
params->freq = 2407 + 5 * wpa_s->conf->p2p_oper_channel;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on configured "
"frequency %d MHz", params->freq);
} else if ((wpa_s->conf->p2p_oper_reg_class == 115 ||
wpa_s->conf->p2p_oper_reg_class == 116 ||
wpa_s->conf->p2p_oper_reg_class == 117 ||
wpa_s->conf->p2p_oper_reg_class == 124 ||
wpa_s->conf->p2p_oper_reg_class == 126 ||
wpa_s->conf->p2p_oper_reg_class == 127) &&
freq_included(channels,
5000 + 5 * wpa_s->conf->p2p_oper_channel)) {
params->freq = 5000 + 5 * wpa_s->conf->p2p_oper_channel;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on configured "
"frequency %d MHz", params->freq);
} else if (wpa_s->conf->p2p_oper_channel == 0 &&
wpa_s->best_overall_freq > 0 &&
p2p_supported_freq_go(wpa_s->global->p2p,
wpa_s->best_overall_freq) &&
freq_included(channels, wpa_s->best_overall_freq)) {
params->freq = wpa_s->best_overall_freq;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best overall "
"channel %d MHz", params->freq);
} else if (wpa_s->conf->p2p_oper_channel == 0 &&
wpa_s->best_24_freq > 0 &&
p2p_supported_freq_go(wpa_s->global->p2p,
wpa_s->best_24_freq) &&
freq_included(channels, wpa_s->best_24_freq)) {
params->freq = wpa_s->best_24_freq;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 2.4 GHz "
"channel %d MHz", params->freq);
} else if (wpa_s->conf->p2p_oper_channel == 0 &&
wpa_s->best_5_freq > 0 &&
p2p_supported_freq_go(wpa_s->global->p2p,
wpa_s->best_5_freq) &&
freq_included(channels, wpa_s->best_5_freq)) {
params->freq = wpa_s->best_5_freq;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 5 GHz "
"channel %d MHz", params->freq);
} else if ((pref_freq = p2p_get_pref_freq(wpa_s->global->p2p,
channels))) {
params->freq = pref_freq;
wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz from preferred "
"channels", params->freq);
} else {
/* no preference, select some channel */
if (wpas_p2p_select_freq_no_pref(wpa_s, params, channels) < 0)
return -1;
}
freqs = os_calloc(wpa_s->num_multichan_concurrent,
sizeof(struct wpa_used_freq_data));
if (!freqs)
return -1;
num = wpas_p2p_valid_oper_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
cand_freq = wpas_p2p_pick_best_used_freq(wpa_s, freqs, num);
/* First try the best used frequency if possible */
if (!freq && cand_freq > 0 && freq_included(channels, cand_freq)) {
params->freq = cand_freq;
} else if (!freq) {
/* Try any of the used frequencies */
for (i = 0; i < num; i++) {
if (freq_included(channels, freqs[i].freq)) {
wpa_printf(MSG_DEBUG, "P2P: Force GO on a channel we are already using (%u MHz)",
freqs[i].freq);
params->freq = freqs[i].freq;
break;
}
}
if (i == num) {
if (wpas_p2p_num_unused_channels(wpa_s) <= 0) {
wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using");
os_free(freqs);
return -1;
} else {
wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using. Use one of the free channels");
}
}
} else {
for (i = 0; i < num; i++) {
if (freqs[i].freq == freq)
break;
}
if (i == num) {
if (wpas_p2p_num_unused_channels(wpa_s) <= 0) {
if (freq)
wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on freq (%u MHz) as all the channels are in use", freq);
os_free(freqs);
return -1;
} else {
wpa_printf(MSG_DEBUG, "P2P: Use one of the free channels");
}
}
}
os_free(freqs);
return 0;
}
static struct wpa_supplicant *
wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated,
int go)
{
struct wpa_supplicant *group_wpa_s;
if (!wpas_p2p_create_iface(wpa_s)) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use same interface for group "
"operations");
wpa_s->p2p_first_connection_timeout = 0;
return wpa_s;
}
if (wpas_p2p_add_group_interface(wpa_s, go ? WPA_IF_P2P_GO :
WPA_IF_P2P_CLIENT) < 0) {
wpa_msg_global(wpa_s, MSG_ERROR,
"P2P: Failed to add group interface");
return NULL;
}
group_wpa_s = wpas_p2p_init_group_interface(wpa_s, go);
if (group_wpa_s == NULL) {
wpa_msg_global(wpa_s, MSG_ERROR,
"P2P: Failed to initialize group interface");
wpas_p2p_remove_pending_group_interface(wpa_s);
return NULL;
}
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use separate group interface %s",
group_wpa_s->ifname);
group_wpa_s->p2p_first_connection_timeout = 0;
return group_wpa_s;
}
/**
* wpas_p2p_group_add - Add a new P2P group with local end as Group Owner
* @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface()
* @persistent_group: Whether to create a persistent group
* @freq: Frequency for the group or 0 to indicate no hardcoding
* @ht40: Start GO with 40 MHz channel width
* @vht: Start GO with VHT support
* Returns: 0 on success, -1 on failure
*
* This function creates a new P2P group with the local end as the Group Owner,
* i.e., without using Group Owner Negotiation.
*/
int wpas_p2p_group_add(struct wpa_supplicant *wpa_s, int persistent_group,
int freq, int ht40, int vht)
{
struct p2p_go_neg_results params;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
os_free(wpa_s->global->add_psk);
wpa_s->global->add_psk = NULL;
/* Make sure we are not running find during connection establishment */
wpa_printf(MSG_DEBUG, "P2P: Stop any on-going P2P FIND");
wpas_p2p_stop_find_oper(wpa_s);
freq = wpas_p2p_select_go_freq(wpa_s, freq);
if (freq < 0)
return -1;
if (wpas_p2p_init_go_params(wpa_s, &params, freq, ht40, vht, NULL))
return -1;
if (params.freq &&
!p2p_supported_freq_go(wpa_s->global->p2p, params.freq)) {
wpa_printf(MSG_DEBUG, "P2P: The selected channel for GO "
"(%u MHz) is not supported for P2P uses",
params.freq);
return -1;
}
p2p_go_params(wpa_s->global->p2p, &params);
params.persistent_group = persistent_group;
wpa_s = wpas_p2p_get_group_iface(wpa_s, 0, 1);
if (wpa_s == NULL)
return -1;
wpas_start_wps_go(wpa_s, &params, 0);
return 0;
}
static int wpas_start_p2p_client(struct wpa_supplicant *wpa_s,
struct wpa_ssid *params, int addr_allocated,
int freq)
{
struct wpa_ssid *ssid;
wpa_s = wpas_p2p_get_group_iface(wpa_s, addr_allocated, 0);
if (wpa_s == NULL)
return -1;
wpa_s->p2p_last_4way_hs_fail = NULL;
wpa_supplicant_ap_deinit(wpa_s);
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
wpa_config_set_network_defaults(ssid);
ssid->temporary = 1;
ssid->proto = WPA_PROTO_RSN;
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
ssid->group_cipher = WPA_CIPHER_CCMP;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->ssid = os_malloc(params->ssid_len);
if (ssid->ssid == NULL) {
wpa_config_remove_network(wpa_s->conf, ssid->id);
return -1;
}
os_memcpy(ssid->ssid, params->ssid, params->ssid_len);
ssid->ssid_len = params->ssid_len;
ssid->p2p_group = 1;
ssid->export_keys = 1;
if (params->psk_set) {
os_memcpy(ssid->psk, params->psk, 32);
ssid->psk_set = 1;
}
if (params->passphrase)
ssid->passphrase = os_strdup(params->passphrase);
wpa_s->show_group_started = 1;
wpa_s->p2p_in_invitation = 1;
wpa_s->p2p_invite_go_freq = freq;
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent,
NULL);
eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT, 0,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
wpa_supplicant_select_network(wpa_s, ssid);
return 0;
}
int wpas_p2p_group_add_persistent(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid, int addr_allocated,
int force_freq, int neg_freq, int ht40,
int vht, const struct p2p_channels *channels,
int connection_timeout)
{
struct p2p_go_neg_results params;
int go = 0, freq;
if (ssid->disabled != 2 || ssid->ssid == NULL)
return -1;
if (wpas_get_p2p_group(wpa_s, ssid->ssid, ssid->ssid_len, &go) &&
go == (ssid->mode == WPAS_MODE_P2P_GO)) {
wpa_printf(MSG_DEBUG, "P2P: Requested persistent group is "
"already running");
return 0;
}
os_free(wpa_s->global->add_psk);
wpa_s->global->add_psk = NULL;
/* Make sure we are not running find during connection establishment */
wpas_p2p_stop_find_oper(wpa_s);
wpa_s->p2p_fallback_to_go_neg = 0;
if (force_freq > 0) {
freq = wpas_p2p_select_go_freq(wpa_s, force_freq);
if (freq < 0)
return -1;
} else {
freq = wpas_p2p_select_go_freq(wpa_s, neg_freq);
if (freq < 0 || (freq > 0 && !freq_included(channels, freq)))
freq = 0;
}
if (ssid->mode == WPAS_MODE_INFRA)
return wpas_start_p2p_client(wpa_s, ssid, addr_allocated, freq);
if (ssid->mode != WPAS_MODE_P2P_GO)
return -1;
if (wpas_p2p_init_go_params(wpa_s, &params, freq, ht40, vht, channels))
return -1;
params.role_go = 1;
params.psk_set = ssid->psk_set;
if (params.psk_set)
os_memcpy(params.psk, ssid->psk, sizeof(params.psk));
if (ssid->passphrase) {
if (os_strlen(ssid->passphrase) >= sizeof(params.passphrase)) {
wpa_printf(MSG_ERROR, "P2P: Invalid passphrase in "
"persistent group");
return -1;
}
os_strlcpy(params.passphrase, ssid->passphrase,
sizeof(params.passphrase));
}
os_memcpy(params.ssid, ssid->ssid, ssid->ssid_len);
params.ssid_len = ssid->ssid_len;
params.persistent_group = 1;
wpa_s = wpas_p2p_get_group_iface(wpa_s, addr_allocated, 1);
if (wpa_s == NULL)
return -1;
wpa_s->p2p_first_connection_timeout = connection_timeout;
wpas_start_wps_go(wpa_s, &params, 0);
return 0;
}
static void wpas_p2p_ie_update(void *ctx, struct wpabuf *beacon_ies,
struct wpabuf *proberesp_ies)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->ap_iface) {
struct hostapd_data *hapd = wpa_s->ap_iface->bss[0];
if (!(hapd->conf->p2p & P2P_GROUP_OWNER)) {
wpabuf_free(beacon_ies);
wpabuf_free(proberesp_ies);
return;
}
if (beacon_ies) {
wpabuf_free(hapd->p2p_beacon_ie);
hapd->p2p_beacon_ie = beacon_ies;
}
wpabuf_free(hapd->p2p_probe_resp_ie);
hapd->p2p_probe_resp_ie = proberesp_ies;
} else {
wpabuf_free(beacon_ies);
wpabuf_free(proberesp_ies);
}
wpa_supplicant_ap_update_beacon(wpa_s);
}
static void wpas_p2p_idle_update(void *ctx, int idle)
{
struct wpa_supplicant *wpa_s = ctx;
if (!wpa_s->ap_iface)
return;
wpa_printf(MSG_DEBUG, "P2P: GO - group %sidle", idle ? "" : "not ");
if (idle) {
if (wpa_s->global->p2p_fail_on_wps_complete &&
wpa_s->p2p_in_provisioning) {
wpas_p2p_grpform_fail_after_wps(wpa_s);
return;
}
wpas_p2p_set_group_idle_timeout(wpa_s);
} else
eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL);
}
struct p2p_group * wpas_p2p_group_init(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
struct p2p_group *group;
struct p2p_group_config *cfg;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return NULL;
cfg = os_zalloc(sizeof(*cfg));
if (cfg == NULL)
return NULL;
if (ssid->p2p_persistent_group && wpa_s->conf->persistent_reconnect)
cfg->persistent_group = 2;
else if (ssid->p2p_persistent_group)
cfg->persistent_group = 1;
os_memcpy(cfg->interface_addr, wpa_s->own_addr, ETH_ALEN);
if (wpa_s->max_stations &&
wpa_s->max_stations < wpa_s->conf->max_num_sta)
cfg->max_clients = wpa_s->max_stations;
else
cfg->max_clients = wpa_s->conf->max_num_sta;
os_memcpy(cfg->ssid, ssid->ssid, ssid->ssid_len);
cfg->ssid_len = ssid->ssid_len;
cfg->freq = ssid->frequency;
cfg->cb_ctx = wpa_s;
cfg->ie_update = wpas_p2p_ie_update;
cfg->idle_update = wpas_p2p_idle_update;
group = p2p_group_init(wpa_s->global->p2p, cfg);
if (group == NULL)
os_free(cfg);
if (ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION)
p2p_group_notif_formation_done(group);
wpa_s->p2p_group = group;
return group;
}
void wpas_p2p_wps_success(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
int registrar)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (!wpa_s->p2p_in_provisioning) {
wpa_printf(MSG_DEBUG, "P2P: Ignore WPS success event - P2P "
"provisioning not in progress");
return;
}
if (ssid && ssid->mode == WPAS_MODE_INFRA) {
u8 go_dev_addr[ETH_ALEN];
os_memcpy(go_dev_addr, wpa_s->bssid, ETH_ALEN);
wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid,
ssid->ssid_len);
/* Clear any stored provisioning info */
p2p_clear_provisioning_info(wpa_s->global->p2p, go_dev_addr);
}
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent,
NULL);
wpa_s->p2p_go_group_formation_completed = 1;
if (ssid && ssid->mode == WPAS_MODE_INFRA) {
/*
* Use a separate timeout for initial data connection to
* complete to allow the group to be removed automatically if
* something goes wrong in this step before the P2P group idle
* timeout mechanism is taken into use.
*/
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Re-start group formation timeout (%d seconds) as client for initial connection",
P2P_MAX_INITIAL_CONN_WAIT);
eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT, 0,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
} else if (ssid) {
/*
* Use a separate timeout for initial data connection to
* complete to allow the group to be removed automatically if
* the client does not complete data connection successfully.
*/
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Re-start group formation timeout (%d seconds) as GO for initial connection",
P2P_MAX_INITIAL_CONN_WAIT_GO);
eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT_GO, 0,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
/*
* Complete group formation on first successful data connection
*/
wpa_s->p2p_go_group_formation_completed = 0;
}
if (wpa_s->global->p2p)
p2p_wps_success_cb(wpa_s->global->p2p, peer_addr);
wpas_group_formation_completed(wpa_s, 1);
}
void wpas_p2p_wps_failed(struct wpa_supplicant *wpa_s,
struct wps_event_fail *fail)
{
if (!wpa_s->p2p_in_provisioning) {
wpa_printf(MSG_DEBUG, "P2P: Ignore WPS fail event - P2P "
"provisioning not in progress");
return;
}
if (wpa_s->go_params) {
p2p_clear_provisioning_info(
wpa_s->global->p2p,
wpa_s->go_params->peer_device_addr);
}
wpas_notify_p2p_wps_failed(wpa_s, fail);
if (wpa_s == wpa_s->global->p2p_group_formation) {
/*
* Allow some time for the failed WPS negotiation exchange to
* complete, but remove the group since group formation cannot
* succeed after provisioning failure.
*/
wpa_printf(MSG_DEBUG, "P2P: WPS step failed during group formation - reject connection from timeout");
wpa_s->global->p2p_fail_on_wps_complete = 1;
eloop_deplete_timeout(0, 50000,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
}
int wpas_p2p_wps_eapol_cb(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->global->p2p_fail_on_wps_complete ||
!wpa_s->p2p_in_provisioning)
return 0;
wpas_p2p_grpform_fail_after_wps(wpa_s);
return 1;
}
int wpas_p2p_prov_disc(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
const char *config_method,
enum wpas_p2p_prov_disc_use use)
{
u16 config_methods;
wpa_s->p2p_fallback_to_go_neg = 0;
wpa_s->pending_pd_use = NORMAL_PD;
if (os_strncmp(config_method, "display", 7) == 0)
config_methods = WPS_CONFIG_DISPLAY;
else if (os_strncmp(config_method, "keypad", 6) == 0)
config_methods = WPS_CONFIG_KEYPAD;
else if (os_strncmp(config_method, "pbc", 3) == 0 ||
os_strncmp(config_method, "pushbutton", 10) == 0)
config_methods = WPS_CONFIG_PUSHBUTTON;
else {
wpa_printf(MSG_DEBUG, "P2P: Unknown config method");
return -1;
}
if (use == WPAS_P2P_PD_AUTO) {
os_memcpy(wpa_s->pending_join_dev_addr, peer_addr, ETH_ALEN);
wpa_s->pending_pd_config_methods = config_methods;
wpa_s->p2p_auto_pd = 1;
wpa_s->p2p_auto_join = 0;
wpa_s->pending_pd_before_join = 0;
wpa_s->auto_pd_scan_retry = 0;
wpas_p2p_stop_find(wpa_s);
wpa_s->p2p_join_scan_count = 0;
os_get_reltime(&wpa_s->p2p_auto_started);
wpa_printf(MSG_DEBUG, "P2P: Auto PD started at %ld.%06ld",
wpa_s->p2p_auto_started.sec,
wpa_s->p2p_auto_started.usec);
wpas_p2p_join_scan(wpa_s, NULL);
return 0;
}
if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled)
return -1;
return p2p_prov_disc_req(wpa_s->global->p2p, peer_addr,
config_methods, use == WPAS_P2P_PD_FOR_JOIN,
0, 1);
}
int wpas_p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf,
char *end)
{
return p2p_scan_result_text(ies, ies_len, buf, end);
}
static void wpas_p2p_clear_pending_action_tx(struct wpa_supplicant *wpa_s)
{
if (!offchannel_pending_action_tx(wpa_s))
return;
wpas_p2p_action_tx_clear(wpa_s);
wpa_printf(MSG_DEBUG, "P2P: Drop pending Action TX due to new "
"operation request");
offchannel_clear_pending_action_tx(wpa_s);
}
int wpas_p2p_find(struct wpa_supplicant *wpa_s, unsigned int timeout,
enum p2p_discovery_type type,
unsigned int num_req_dev_types, const u8 *req_dev_types,
const u8 *dev_id, unsigned int search_delay)
{
wpas_p2p_clear_pending_action_tx(wpa_s);
wpa_s->p2p_long_listen = 0;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL ||
wpa_s->p2p_in_provisioning)
return -1;
wpa_supplicant_cancel_sched_scan(wpa_s);
return p2p_find(wpa_s->global->p2p, timeout, type,
num_req_dev_types, req_dev_types, dev_id,
search_delay);
}
static int wpas_p2p_stop_find_oper(struct wpa_supplicant *wpa_s)
{
wpas_p2p_clear_pending_action_tx(wpa_s);
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL);
if (wpa_s->global->p2p)
p2p_stop_find(wpa_s->global->p2p);
return 0;
}
void wpas_p2p_stop_find(struct wpa_supplicant *wpa_s)
{
if (wpas_p2p_stop_find_oper(wpa_s) > 0)
return;
wpas_p2p_remove_pending_group_interface(wpa_s);
}
static void wpas_p2p_long_listen_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_s->p2p_long_listen = 0;
}
int wpas_p2p_listen(struct wpa_supplicant *wpa_s, unsigned int timeout)
{
int res;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
wpa_supplicant_cancel_sched_scan(wpa_s);
wpas_p2p_clear_pending_action_tx(wpa_s);
if (timeout == 0) {
/*
* This is a request for unlimited Listen state. However, at
* least for now, this is mapped to a Listen state for one
* hour.
*/
timeout = 3600;
}
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
wpa_s->p2p_long_listen = 0;
/*
* Stop previous find/listen operation to avoid trying to request a new
* remain-on-channel operation while the driver is still running the
* previous one.
*/
if (wpa_s->global->p2p)
p2p_stop_find(wpa_s->global->p2p);
res = wpas_p2p_listen_start(wpa_s, timeout * 1000);
if (res == 0 && timeout * 1000 > wpa_s->max_remain_on_chan) {
wpa_s->p2p_long_listen = timeout * 1000;
eloop_register_timeout(timeout, 0,
wpas_p2p_long_listen_timeout,
wpa_s, NULL);
}
return res;
}
int wpas_p2p_assoc_req_ie(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
u8 *buf, size_t len, int p2p_group)
{
struct wpabuf *p2p_ie;
int ret;
if (wpa_s->global->p2p_disabled)
return -1;
if (wpa_s->conf->p2p_disabled)
return -1;
if (wpa_s->global->p2p == NULL)
return -1;
if (bss == NULL)
return -1;
p2p_ie = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
ret = p2p_assoc_req_ie(wpa_s->global->p2p, bss->bssid, buf, len,
p2p_group, p2p_ie);
wpabuf_free(p2p_ie);
return ret;
}
int wpas_p2p_probe_req_rx(struct wpa_supplicant *wpa_s, const u8 *addr,
const u8 *dst, const u8 *bssid,
const u8 *ie, size_t ie_len, int ssi_signal)
{
if (wpa_s->global->p2p_disabled)
return 0;
if (wpa_s->global->p2p == NULL)
return 0;
switch (p2p_probe_req_rx(wpa_s->global->p2p, addr, dst, bssid,
ie, ie_len)) {
case P2P_PREQ_NOT_P2P:
wpas_notify_preq(wpa_s, addr, dst, bssid, ie, ie_len,
ssi_signal);
/* fall through */
case P2P_PREQ_MALFORMED:
case P2P_PREQ_NOT_LISTEN:
case P2P_PREQ_NOT_PROCESSED:
default: /* make gcc happy */
return 0;
case P2P_PREQ_PROCESSED:
return 1;
}
}
void wpas_p2p_rx_action(struct wpa_supplicant *wpa_s, const u8 *da,
const u8 *sa, const u8 *bssid,
u8 category, const u8 *data, size_t len, int freq)
{
if (wpa_s->global->p2p_disabled)
return;
if (wpa_s->global->p2p == NULL)
return;
p2p_rx_action(wpa_s->global->p2p, da, sa, bssid, category, data, len,
freq);
}
void wpas_p2p_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ies)
{
if (wpa_s->global->p2p_disabled)
return;
if (wpa_s->global->p2p == NULL)
return;
p2p_scan_ie(wpa_s->global->p2p, ies, NULL);
}
static void wpas_p2p_group_deinit(struct wpa_supplicant *wpa_s)
{
p2p_group_deinit(wpa_s->p2p_group);
wpa_s->p2p_group = NULL;
wpa_s->ap_configured_cb = NULL;
wpa_s->ap_configured_cb_ctx = NULL;
wpa_s->ap_configured_cb_data = NULL;
wpa_s->connect_without_scan = NULL;
}
int wpas_p2p_reject(struct wpa_supplicant *wpa_s, const u8 *addr)
{
wpa_s->p2p_long_listen = 0;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
return p2p_reject(wpa_s->global->p2p, addr);
}
/* Invite to reinvoke a persistent group */
int wpas_p2p_invite(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
struct wpa_ssid *ssid, const u8 *go_dev_addr, int freq,
int ht40, int vht, int pref_freq)
{
enum p2p_invite_role role;
u8 *bssid = NULL;
int force_freq = 0;
int res;
int no_pref_freq_given = pref_freq == 0;
wpa_s->global->p2p_invite_group = NULL;
if (peer_addr)
os_memcpy(wpa_s->p2p_auth_invite, peer_addr, ETH_ALEN);
else
os_memset(wpa_s->p2p_auth_invite, 0, ETH_ALEN);
wpa_s->p2p_persistent_go_freq = freq;
wpa_s->p2p_go_ht40 = !!ht40;
if (ssid->mode == WPAS_MODE_P2P_GO) {
role = P2P_INVITE_ROLE_GO;
if (peer_addr == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Missing peer "
"address in invitation command");
return -1;
}
if (wpas_p2p_create_iface(wpa_s)) {
if (wpas_p2p_add_group_interface(wpa_s,
WPA_IF_P2P_GO) < 0) {
wpa_printf(MSG_ERROR, "P2P: Failed to "
"allocate a new interface for the "
"group");
return -1;
}
bssid = wpa_s->pending_interface_addr;
} else
bssid = wpa_s->own_addr;
} else {
role = P2P_INVITE_ROLE_CLIENT;
peer_addr = ssid->bssid;
}
wpa_s->pending_invite_ssid_id = ssid->id;
res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq,
role == P2P_INVITE_ROLE_GO);
if (res)
return res;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
if (wpa_s->parent->conf->p2p_ignore_shared_freq &&
no_pref_freq_given && pref_freq > 0 &&
wpa_s->num_multichan_concurrent > 1 &&
wpas_p2p_num_unused_channels(wpa_s) > 0) {
wpa_printf(MSG_DEBUG, "P2P: Ignore own channel preference %d MHz for invitation due to p2p_ignore_shared_freq=1 configuration",
pref_freq);
pref_freq = 0;
}
return p2p_invite(wpa_s->global->p2p, peer_addr, role, bssid,
ssid->ssid, ssid->ssid_len, force_freq, go_dev_addr,
1, pref_freq, -1);
}
/* Invite to join an active group */
int wpas_p2p_invite_group(struct wpa_supplicant *wpa_s, const char *ifname,
const u8 *peer_addr, const u8 *go_dev_addr)
{
struct wpa_global *global = wpa_s->global;
enum p2p_invite_role role;
u8 *bssid = NULL;
struct wpa_ssid *ssid;
int persistent;
int freq = 0, force_freq = 0, pref_freq = 0;
int res;
wpa_s->p2p_persistent_go_freq = 0;
wpa_s->p2p_go_ht40 = 0;
wpa_s->p2p_go_vht = 0;
for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (os_strcmp(wpa_s->ifname, ifname) == 0)
break;
}
if (wpa_s == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Interface '%s' not found", ifname);
return -1;
}
ssid = wpa_s->current_ssid;
if (ssid == NULL) {
wpa_printf(MSG_DEBUG, "P2P: No current SSID to use for "
"invitation");
return -1;
}
wpa_s->global->p2p_invite_group = wpa_s;
persistent = ssid->p2p_persistent_group &&
wpas_p2p_get_persistent(wpa_s->parent, peer_addr,
ssid->ssid, ssid->ssid_len);
if (ssid->mode == WPAS_MODE_P2P_GO) {
role = P2P_INVITE_ROLE_ACTIVE_GO;
bssid = wpa_s->own_addr;
if (go_dev_addr == NULL)
go_dev_addr = wpa_s->global->p2p_dev_addr;
freq = ssid->frequency;
} else {
role = P2P_INVITE_ROLE_CLIENT;
if (wpa_s->wpa_state < WPA_ASSOCIATED) {
wpa_printf(MSG_DEBUG, "P2P: Not associated - cannot "
"invite to current group");
return -1;
}
bssid = wpa_s->bssid;
if (go_dev_addr == NULL &&
!is_zero_ether_addr(wpa_s->go_dev_addr))
go_dev_addr = wpa_s->go_dev_addr;
freq = wpa_s->current_bss ? wpa_s->current_bss->freq :
(int) wpa_s->assoc_freq;
}
wpa_s->parent->pending_invite_ssid_id = -1;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq,
role == P2P_INVITE_ROLE_ACTIVE_GO);
if (res)
return res;
wpas_p2p_set_own_freq_preference(wpa_s, force_freq);
return p2p_invite(wpa_s->global->p2p, peer_addr, role, bssid,
ssid->ssid, ssid->ssid_len, force_freq,
go_dev_addr, persistent, pref_freq, -1);
}
void wpas_p2p_completed(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
u8 go_dev_addr[ETH_ALEN];
int network_id = -1;
int persistent;
int freq;
u8 ip[3 * 4];
char ip_addr[100];
if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION) {
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
if (!wpa_s->show_group_started || !ssid)
return;
wpa_s->show_group_started = 0;
os_memset(go_dev_addr, 0, ETH_ALEN);
if (ssid->bssid_set)
os_memcpy(go_dev_addr, ssid->bssid, ETH_ALEN);
persistent = wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid,
ssid->ssid_len);
os_memcpy(wpa_s->go_dev_addr, go_dev_addr, ETH_ALEN);
if (wpa_s->global->p2p_group_formation == wpa_s)
wpa_s->global->p2p_group_formation = NULL;
freq = wpa_s->current_bss ? wpa_s->current_bss->freq :
(int) wpa_s->assoc_freq;
ip_addr[0] = '\0';
if (wpa_sm_get_p2p_ip_addr(wpa_s->wpa, ip) == 0) {
os_snprintf(ip_addr, sizeof(ip_addr), " ip_addr=%u.%u.%u.%u "
"ip_mask=%u.%u.%u.%u go_ip_addr=%u.%u.%u.%u",
ip[0], ip[1], ip[2], ip[3],
ip[4], ip[5], ip[6], ip[7],
ip[8], ip[9], ip[10], ip[11]);
}
wpas_p2p_group_started(wpa_s, 0, ssid, freq,
ssid->passphrase == NULL && ssid->psk_set ?
ssid->psk : NULL,
ssid->passphrase, go_dev_addr, persistent,
ip_addr);
if (persistent)
network_id = wpas_p2p_store_persistent_group(wpa_s->parent,
ssid, go_dev_addr);
if (network_id < 0)
network_id = ssid->id;
wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 1);
}
int wpas_p2p_presence_req(struct wpa_supplicant *wpa_s, u32 duration1,
u32 interval1, u32 duration2, u32 interval2)
{
int ret;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
if (wpa_s->wpa_state < WPA_ASSOCIATED ||
wpa_s->current_ssid == NULL ||
wpa_s->current_ssid->mode != WPAS_MODE_INFRA)
return -1;
ret = p2p_presence_req(wpa_s->global->p2p, wpa_s->bssid,
wpa_s->own_addr, wpa_s->assoc_freq,
duration1, interval1, duration2, interval2);
if (ret == 0)
wpa_s->waiting_presence_resp = 1;
return ret;
}
int wpas_p2p_ext_listen(struct wpa_supplicant *wpa_s, unsigned int period,
unsigned int interval)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
return p2p_ext_listen(wpa_s->global->p2p, period, interval);
}
static int wpas_p2p_is_client(struct wpa_supplicant *wpa_s)
{
if (wpa_s->current_ssid == NULL) {
/*
* current_ssid can be cleared when P2P client interface gets
* disconnected, so assume this interface was used as P2P
* client.
*/
return 1;
}
return wpa_s->current_ssid->p2p_group &&
wpa_s->current_ssid->mode == WPAS_MODE_INFRA;
}
static void wpas_p2p_group_idle_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (wpa_s->conf->p2p_group_idle == 0 && !wpas_p2p_is_client(wpa_s)) {
wpa_printf(MSG_DEBUG, "P2P: Ignore group idle timeout - "
"disabled");
return;
}
wpa_printf(MSG_DEBUG, "P2P: Group idle timeout reached - terminate "
"group");
wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_IDLE_TIMEOUT);
}
static void wpas_p2p_set_group_idle_timeout(struct wpa_supplicant *wpa_s)
{
int timeout;
if (eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0)
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout");
if (wpa_s->current_ssid == NULL || !wpa_s->current_ssid->p2p_group)
return;
timeout = wpa_s->conf->p2p_group_idle;
if (wpa_s->current_ssid->mode == WPAS_MODE_INFRA &&
(timeout == 0 || timeout > P2P_MAX_CLIENT_IDLE))
timeout = P2P_MAX_CLIENT_IDLE;
if (timeout == 0)
return;
if (timeout < 0) {
if (wpa_s->current_ssid->mode == WPAS_MODE_INFRA)
timeout = 0; /* special client mode no-timeout */
else
return;
}
if (wpa_s->p2p_in_provisioning) {
/*
* Use the normal group formation timeout during the
* provisioning phase to avoid terminating this process too
* early due to group idle timeout.
*/
wpa_printf(MSG_DEBUG, "P2P: Do not use P2P group idle timeout "
"during provisioning");
return;
}
if (wpa_s->show_group_started) {
/*
* Use the normal group formation timeout between the end of
* the provisioning phase and completion of 4-way handshake to
* avoid terminating this process too early due to group idle
* timeout.
*/
wpa_printf(MSG_DEBUG, "P2P: Do not use P2P group idle timeout "
"while waiting for initial 4-way handshake to "
"complete");
return;
}
wpa_printf(MSG_DEBUG, "P2P: Set P2P group idle timeout to %u seconds",
timeout);
eloop_register_timeout(timeout, 0, wpas_p2p_group_idle_timeout,
wpa_s, NULL);
}
/* Returns 1 if the interface was removed */
int wpas_p2p_deauth_notif(struct wpa_supplicant *wpa_s, const u8 *bssid,
u16 reason_code, const u8 *ie, size_t ie_len,
int locally_generated)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
if (!locally_generated)
p2p_deauth_notif(wpa_s->global->p2p, bssid, reason_code, ie,
ie_len);
if (reason_code == WLAN_REASON_DEAUTH_LEAVING && !locally_generated &&
wpa_s->current_ssid &&
wpa_s->current_ssid->p2p_group &&
wpa_s->current_ssid->mode == WPAS_MODE_INFRA) {
wpa_printf(MSG_DEBUG, "P2P: GO indicated that the P2P Group "
"session is ending");
if (wpas_p2p_group_delete(wpa_s,
P2P_GROUP_REMOVAL_GO_ENDING_SESSION)
> 0)
return 1;
}
return 0;
}
void wpas_p2p_disassoc_notif(struct wpa_supplicant *wpa_s, const u8 *bssid,
u16 reason_code, const u8 *ie, size_t ie_len,
int locally_generated)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (!locally_generated)
p2p_disassoc_notif(wpa_s->global->p2p, bssid, reason_code, ie,
ie_len);
}
void wpas_p2p_update_config(struct wpa_supplicant *wpa_s)
{
struct p2p_data *p2p = wpa_s->global->p2p;
if (p2p == NULL)
return;
if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
return;
if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_NAME)
p2p_set_dev_name(p2p, wpa_s->conf->device_name);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE)
p2p_set_pri_dev_type(p2p, wpa_s->conf->device_type);
if (wpa_s->wps &&
(wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS))
p2p_set_config_methods(p2p, wpa_s->wps->config_methods);
if (wpa_s->wps && (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID))
p2p_set_uuid(p2p, wpa_s->wps->uuid);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_WPS_STRING) {
p2p_set_manufacturer(p2p, wpa_s->conf->manufacturer);
p2p_set_model_name(p2p, wpa_s->conf->model_name);
p2p_set_model_number(p2p, wpa_s->conf->model_number);
p2p_set_serial_number(p2p, wpa_s->conf->serial_number);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_SEC_DEVICE_TYPE)
p2p_set_sec_dev_types(p2p,
(void *) wpa_s->conf->sec_device_type,
wpa_s->conf->num_sec_device_types);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_VENDOR_EXTENSION) {
int i;
p2p_remove_wps_vendor_extensions(p2p);
for (i = 0; i < MAX_WPS_VENDOR_EXT; i++) {
if (wpa_s->conf->wps_vendor_ext[i] == NULL)
continue;
p2p_add_wps_vendor_extension(
p2p, wpa_s->conf->wps_vendor_ext[i]);
}
}
if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
char country[3];
country[0] = wpa_s->conf->country[0];
country[1] = wpa_s->conf->country[1];
country[2] = 0x04;
p2p_set_country(p2p, country);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_SSID_POSTFIX) {
p2p_set_ssid_postfix(p2p, (u8 *) wpa_s->conf->p2p_ssid_postfix,
wpa_s->conf->p2p_ssid_postfix ?
os_strlen(wpa_s->conf->p2p_ssid_postfix) :
0);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_INTRA_BSS)
p2p_set_intra_bss_dist(p2p, wpa_s->conf->p2p_intra_bss);
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_LISTEN_CHANNEL) {
u8 reg_class, channel;
int ret;
unsigned int r;
u8 channel_forced;
if (wpa_s->conf->p2p_listen_reg_class &&
wpa_s->conf->p2p_listen_channel) {
reg_class = wpa_s->conf->p2p_listen_reg_class;
channel = wpa_s->conf->p2p_listen_channel;
channel_forced = 1;
} else {
reg_class = 81;
/*
* Pick one of the social channels randomly as the
* listen channel.
*/
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
channel = 1;
else
channel = 1 + (r % 3) * 5;
channel_forced = 0;
}
ret = p2p_set_listen_channel(p2p, reg_class, channel,
channel_forced);
if (ret)
wpa_printf(MSG_ERROR, "P2P: Own listen channel update "
"failed: %d", ret);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_OPER_CHANNEL) {
u8 op_reg_class, op_channel, cfg_op_channel;
int ret = 0;
unsigned int r;
if (wpa_s->conf->p2p_oper_reg_class &&
wpa_s->conf->p2p_oper_channel) {
op_reg_class = wpa_s->conf->p2p_oper_reg_class;
op_channel = wpa_s->conf->p2p_oper_channel;
cfg_op_channel = 1;
} else {
op_reg_class = 81;
/*
* Use random operation channel from (1, 6, 11)
*if no other preference is indicated.
*/
if (os_get_random((u8 *) &r, sizeof(r)) < 0)
op_channel = 1;
else
op_channel = 1 + (r % 3) * 5;
cfg_op_channel = 0;
}
ret = p2p_set_oper_channel(p2p, op_reg_class, op_channel,
cfg_op_channel);
if (ret)
wpa_printf(MSG_ERROR, "P2P: Own oper channel update "
"failed: %d", ret);
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_PREF_CHAN) {
if (p2p_set_pref_chan(p2p, wpa_s->conf->num_p2p_pref_chan,
wpa_s->conf->p2p_pref_chan) < 0) {
wpa_printf(MSG_ERROR, "P2P: Preferred channel list "
"update failed");
}
if (p2p_set_no_go_freq(p2p, &wpa_s->conf->p2p_no_go_freq) < 0) {
wpa_printf(MSG_ERROR, "P2P: No GO channel list "
"update failed");
}
}
if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_PASSPHRASE_LEN)
p2p_set_passphrase_len(p2p, wpa_s->conf->p2p_passphrase_len);
}
int wpas_p2p_set_noa(struct wpa_supplicant *wpa_s, u8 count, int start,
int duration)
{
if (!wpa_s->ap_iface)
return -1;
return hostapd_p2p_set_noa(wpa_s->ap_iface->bss[0], count, start,
duration);
}
int wpas_p2p_set_cross_connect(struct wpa_supplicant *wpa_s, int enabled)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
wpa_s->global->cross_connection = enabled;
p2p_set_cross_connect(wpa_s->global->p2p, enabled);
if (!enabled) {
struct wpa_supplicant *iface;
for (iface = wpa_s->global->ifaces; iface; iface = iface->next)
{
if (iface->cross_connect_enabled == 0)
continue;
iface->cross_connect_enabled = 0;
iface->cross_connect_in_use = 0;
wpa_msg_global(iface->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s",
iface->ifname,
iface->cross_connect_uplink);
}
}
return 0;
}
static void wpas_p2p_enable_cross_connect(struct wpa_supplicant *uplink)
{
struct wpa_supplicant *iface;
if (!uplink->global->cross_connection)
return;
for (iface = uplink->global->ifaces; iface; iface = iface->next) {
if (!iface->cross_connect_enabled)
continue;
if (os_strcmp(uplink->ifname, iface->cross_connect_uplink) !=
0)
continue;
if (iface->ap_iface == NULL)
continue;
if (iface->cross_connect_in_use)
continue;
iface->cross_connect_in_use = 1;
wpa_msg_global(iface->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_ENABLE "%s %s",
iface->ifname, iface->cross_connect_uplink);
}
}
static void wpas_p2p_disable_cross_connect(struct wpa_supplicant *uplink)
{
struct wpa_supplicant *iface;
for (iface = uplink->global->ifaces; iface; iface = iface->next) {
if (!iface->cross_connect_enabled)
continue;
if (os_strcmp(uplink->ifname, iface->cross_connect_uplink) !=
0)
continue;
if (!iface->cross_connect_in_use)
continue;
wpa_msg_global(iface->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s",
iface->ifname, iface->cross_connect_uplink);
iface->cross_connect_in_use = 0;
}
}
void wpas_p2p_notif_connected(struct wpa_supplicant *wpa_s)
{
if (wpa_s->ap_iface || wpa_s->current_ssid == NULL ||
wpa_s->current_ssid->mode != WPAS_MODE_INFRA ||
wpa_s->cross_connect_disallowed)
wpas_p2p_disable_cross_connect(wpa_s);
else
wpas_p2p_enable_cross_connect(wpa_s);
if (!wpa_s->ap_iface &&
eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0)
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout");
}
void wpas_p2p_notif_disconnected(struct wpa_supplicant *wpa_s)
{
wpas_p2p_disable_cross_connect(wpa_s);
if (!wpa_s->ap_iface &&
!eloop_is_timeout_registered(wpas_p2p_group_idle_timeout,
wpa_s, NULL))
wpas_p2p_set_group_idle_timeout(wpa_s);
}
static void wpas_p2p_cross_connect_setup(struct wpa_supplicant *wpa_s)
{
struct wpa_supplicant *iface;
if (!wpa_s->global->cross_connection)
return;
for (iface = wpa_s->global->ifaces; iface; iface = iface->next) {
if (iface == wpa_s)
continue;
if (iface->drv_flags &
WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)
continue;
if (iface->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE)
continue;
wpa_s->cross_connect_enabled = 1;
os_strlcpy(wpa_s->cross_connect_uplink, iface->ifname,
sizeof(wpa_s->cross_connect_uplink));
wpa_printf(MSG_DEBUG, "P2P: Enable cross connection from "
"%s to %s whenever uplink is available",
wpa_s->ifname, wpa_s->cross_connect_uplink);
if (iface->ap_iface || iface->current_ssid == NULL ||
iface->current_ssid->mode != WPAS_MODE_INFRA ||
iface->cross_connect_disallowed ||
iface->wpa_state != WPA_COMPLETED)
break;
wpa_s->cross_connect_in_use = 1;
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_ENABLE "%s %s",
wpa_s->ifname, wpa_s->cross_connect_uplink);
break;
}
}
int wpas_p2p_notif_pbc_overlap(struct wpa_supplicant *wpa_s)
{
if (wpa_s->p2p_group_interface != P2P_GROUP_INTERFACE_CLIENT &&
!wpa_s->p2p_in_provisioning)
return 0; /* not P2P client operation */
wpa_printf(MSG_DEBUG, "P2P: Terminate connection due to WPS PBC "
"session overlap");
if (wpa_s != wpa_s->parent)
wpa_msg_ctrl(wpa_s->parent, MSG_INFO, WPS_EVENT_OVERLAP);
wpas_p2p_group_formation_failed(wpa_s);
return 1;
}
void wpas_p2p_pbc_overlap_cb(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpas_p2p_notif_pbc_overlap(wpa_s);
}
void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s)
{
struct p2p_channels chan, cli_chan;
struct wpa_supplicant *ifs;
if (wpa_s->global == NULL || wpa_s->global->p2p == NULL)
return;
os_memset(&chan, 0, sizeof(chan));
os_memset(&cli_chan, 0, sizeof(cli_chan));
if (wpas_p2p_setup_channels(wpa_s, &chan, &cli_chan)) {
wpa_printf(MSG_ERROR, "P2P: Failed to update supported "
"channel list");
return;
}
p2p_update_channel_list(wpa_s->global->p2p, &chan, &cli_chan);
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
int freq;
if (!ifs->current_ssid ||
!ifs->current_ssid->p2p_group ||
(ifs->current_ssid->mode != WPAS_MODE_P2P_GO &&
ifs->current_ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION))
continue;
freq = ifs->current_ssid->frequency;
if (freq_included(&chan, freq)) {
wpa_dbg(ifs, MSG_DEBUG,
"P2P GO operating frequency %d MHz in valid range",
freq);
continue;
}
wpa_dbg(ifs, MSG_DEBUG,
"P2P GO operating in invalid frequency %d MHz", freq);
/* TODO: Consider using CSA or removing the group within
* wpa_supplicant */
wpa_msg(ifs, MSG_INFO, P2P_EVENT_REMOVE_AND_REFORM_GROUP);
}
}
static void wpas_p2p_scan_res_ignore(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
wpa_printf(MSG_DEBUG, "P2P: Ignore scan results");
}
int wpas_p2p_cancel(struct wpa_supplicant *wpa_s)
{
struct wpa_global *global = wpa_s->global;
int found = 0;
const u8 *peer;
if (global->p2p == NULL)
return -1;
wpa_printf(MSG_DEBUG, "P2P: Request to cancel group formation");
if (wpa_s->pending_interface_name[0] &&
!is_zero_ether_addr(wpa_s->pending_interface_addr))
found = 1;
peer = p2p_get_go_neg_peer(global->p2p);
if (peer) {
wpa_printf(MSG_DEBUG, "P2P: Unauthorize pending GO Neg peer "
MACSTR, MAC2STR(peer));
p2p_unauthorize(global->p2p, peer);
found = 1;
}
if (wpa_s->scan_res_handler == wpas_p2p_scan_res_join) {
wpa_printf(MSG_DEBUG, "P2P: Stop pending scan for join");
wpa_s->scan_res_handler = wpas_p2p_scan_res_ignore;
found = 1;
}
if (wpa_s->pending_pd_before_join) {
wpa_printf(MSG_DEBUG, "P2P: Stop pending PD before join");
wpa_s->pending_pd_before_join = 0;
found = 1;
}
wpas_p2p_stop_find(wpa_s);
for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (wpa_s == global->p2p_group_formation &&
(wpa_s->p2p_in_provisioning ||
wpa_s->parent->pending_interface_type ==
WPA_IF_P2P_CLIENT)) {
wpa_printf(MSG_DEBUG, "P2P: Interface %s in group "
"formation found - cancelling",
wpa_s->ifname);
found = 1;
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
if (wpa_s->p2p_in_provisioning) {
wpas_group_formation_completed(wpa_s, 0);
break;
}
wpas_p2p_group_delete(wpa_s,
P2P_GROUP_REMOVAL_REQUESTED);
break;
} else if (wpa_s->p2p_in_invitation) {
wpa_printf(MSG_DEBUG, "P2P: Interface %s in invitation found - cancelling",
wpa_s->ifname);
found = 1;
wpas_p2p_group_formation_failed(wpa_s);
}
}
if (!found) {
wpa_printf(MSG_DEBUG, "P2P: No ongoing group formation found");
return -1;
}
return 0;
}
void wpas_p2p_interface_unavailable(struct wpa_supplicant *wpa_s)
{
if (wpa_s->current_ssid == NULL || !wpa_s->current_ssid->p2p_group)
return;
wpa_printf(MSG_DEBUG, "P2P: Remove group due to driver resource not "
"being available anymore");
wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_UNAVAILABLE);
}
void wpas_p2p_update_best_channels(struct wpa_supplicant *wpa_s,
int freq_24, int freq_5, int freq_overall)
{
struct p2p_data *p2p = wpa_s->global->p2p;
if (p2p == NULL)
return;
p2p_set_best_channels(p2p, freq_24, freq_5, freq_overall);
}
int wpas_p2p_unauthorize(struct wpa_supplicant *wpa_s, const char *addr)
{
u8 peer[ETH_ALEN];
struct p2p_data *p2p = wpa_s->global->p2p;
if (p2p == NULL)
return -1;
if (hwaddr_aton(addr, peer))
return -1;
return p2p_unauthorize(p2p, peer);
}
/**
* wpas_p2p_disconnect - Disconnect from a P2P Group
* @wpa_s: Pointer to wpa_supplicant data
* Returns: 0 on success, -1 on failure
*
* This can be used to disconnect from a group in which the local end is a P2P
* Client or to end a P2P Group in case the local end is the Group Owner. If a
* virtual network interface was created for this group, that interface will be
* removed. Otherwise, only the configured P2P group network will be removed
* from the interface.
*/
int wpas_p2p_disconnect(struct wpa_supplicant *wpa_s)
{
if (wpa_s == NULL)
return -1;
return wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_REQUESTED) < 0 ?
-1 : 0;
}
int wpas_p2p_in_progress(struct wpa_supplicant *wpa_s)
{
int ret;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
ret = p2p_in_progress(wpa_s->global->p2p);
if (ret == 0) {
/*
* Check whether there is an ongoing WPS provisioning step (or
* other parts of group formation) on another interface since
* p2p_in_progress() does not report this to avoid issues for
* scans during such provisioning step.
*/
if (wpa_s->global->p2p_group_formation &&
wpa_s->global->p2p_group_formation != wpa_s) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Another interface (%s) "
"in group formation",
wpa_s->global->p2p_group_formation->ifname);
ret = 1;
}
}
if (!ret && wpa_s->global->p2p_go_wait_client.sec) {
struct os_reltime now;
os_get_reltime(&now);
if (os_reltime_expired(&now, &wpa_s->global->p2p_go_wait_client,
P2P_MAX_INITIAL_CONN_WAIT_GO)) {
/* Wait for the first client has expired */
wpa_s->global->p2p_go_wait_client.sec = 0;
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Waiting for initial client connection during group formation");
ret = 1;
}
}
return ret;
}
void wpas_p2p_network_removed(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
if (wpa_s->p2p_in_provisioning && ssid->p2p_group &&
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL) > 0) {
/**
* Remove the network by scheduling the group formation
* timeout to happen immediately. The teardown code
* needs to be scheduled to run asynch later so that we
* don't delete data from under ourselves unexpectedly.
* Calling wpas_p2p_group_formation_timeout directly
* causes a series of crashes in WPS failure scenarios.
*/
wpa_printf(MSG_DEBUG, "P2P: Canceled group formation due to "
"P2P group network getting removed");
eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
}
struct wpa_ssid * wpas_p2p_get_persistent(struct wpa_supplicant *wpa_s,
const u8 *addr, const u8 *ssid,
size_t ssid_len)
{
struct wpa_ssid *s;
size_t i;
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled != 2)
continue;
if (ssid &&
(ssid_len != s->ssid_len ||
os_memcmp(ssid, s->ssid, ssid_len) != 0))
continue;
if (addr == NULL) {
if (s->mode == WPAS_MODE_P2P_GO)
return s;
continue;
}
if (os_memcmp(s->bssid, addr, ETH_ALEN) == 0)
return s; /* peer is GO in the persistent group */
if (s->mode != WPAS_MODE_P2P_GO || s->p2p_client_list == NULL)
continue;
for (i = 0; i < s->num_p2p_clients; i++) {
if (os_memcmp(s->p2p_client_list + i * ETH_ALEN,
addr, ETH_ALEN) == 0)
return s; /* peer is P2P client in persistent
* group */
}
}
return NULL;
}
void wpas_p2p_notify_ap_sta_authorized(struct wpa_supplicant *wpa_s,
const u8 *addr)
{
if (eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL) > 0) {
/*
* This can happen if WPS provisioning step is not terminated
* cleanly (e.g., P2P Client does not send WSC_Done). Since the
* peer was able to connect, there is no need to time out group
* formation after this, though. In addition, this is used with
* the initial connection wait on the GO as a separate formation
* timeout and as such, expected to be hit after the initial WPS
* provisioning step.
*/
wpa_printf(MSG_DEBUG, "P2P: Canceled P2P group formation timeout on data connection");
}
if (!wpa_s->p2p_go_group_formation_completed) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Marking group formation completed on GO on first data connection");
wpa_s->p2p_go_group_formation_completed = 1;
wpa_s->global->p2p_group_formation = NULL;
wpa_s->p2p_in_provisioning = 0;
wpa_s->p2p_in_invitation = 0;
}
wpa_s->global->p2p_go_wait_client.sec = 0;
if (addr == NULL)
return;
wpas_p2p_add_persistent_group_client(wpa_s, addr);
}
static void wpas_p2p_fallback_to_go_neg(struct wpa_supplicant *wpa_s,
int group_added)
{
struct wpa_supplicant *group = wpa_s;
if (wpa_s->global->p2p_group_formation)
group = wpa_s->global->p2p_group_formation;
wpa_s = wpa_s->parent;
offchannel_send_action_done(wpa_s);
if (group_added)
wpas_p2p_group_delete(group, P2P_GROUP_REMOVAL_SILENT);
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Fall back to GO Negotiation");
wpas_p2p_connect(wpa_s, wpa_s->pending_join_dev_addr, wpa_s->p2p_pin,
wpa_s->p2p_wps_method, wpa_s->p2p_persistent_group, 0,
0, 0, wpa_s->p2p_go_intent, wpa_s->p2p_connect_freq,
wpa_s->p2p_persistent_id,
wpa_s->p2p_pd_before_go_neg,
wpa_s->p2p_go_ht40,
wpa_s->p2p_go_vht);
}
int wpas_p2p_scan_no_go_seen(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->p2p_fallback_to_go_neg ||
wpa_s->p2p_in_provisioning <= 5)
return 0;
if (wpas_p2p_peer_go(wpa_s, wpa_s->pending_join_dev_addr) > 0)
return 0; /* peer operating as a GO */
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: GO not found for p2p_connect-auto - "
"fallback to GO Negotiation");
wpas_p2p_fallback_to_go_neg(wpa_s, 1);
return 1;
}
unsigned int wpas_p2p_search_delay(struct wpa_supplicant *wpa_s)
{
struct wpa_supplicant *ifs;
if (wpa_s->wpa_state > WPA_SCANNING) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use %u ms search delay due to "
"concurrent operation",
wpa_s->conf->p2p_search_delay);
return wpa_s->conf->p2p_search_delay;
}
dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant,
radio_list) {
if (ifs != wpa_s && ifs->wpa_state > WPA_SCANNING) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use %u ms search "
"delay due to concurrent operation on "
"interface %s",
wpa_s->conf->p2p_search_delay,
ifs->ifname);
return wpa_s->conf->p2p_search_delay;
}
}
return 0;
}
static int wpas_p2p_remove_psk_entry(struct wpa_supplicant *wpa_s,
struct wpa_ssid *s, const u8 *addr,
int iface_addr)
{
struct psk_list_entry *psk, *tmp;
int changed = 0;
dl_list_for_each_safe(psk, tmp, &s->psk_list, struct psk_list_entry,
list) {
if ((iface_addr && !psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0) ||
(!iface_addr && psk->p2p &&
os_memcmp(addr, psk->addr, ETH_ALEN) == 0)) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Remove persistent group PSK list entry for "
MACSTR " p2p=%u",
MAC2STR(psk->addr), psk->p2p);
dl_list_del(&psk->list);
os_free(psk);
changed++;
}
}
return changed;
}
void wpas_p2p_new_psk_cb(struct wpa_supplicant *wpa_s, const u8 *mac_addr,
const u8 *p2p_dev_addr,
const u8 *psk, size_t psk_len)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
struct wpa_ssid *persistent;
struct psk_list_entry *p, *last;
if (psk_len != sizeof(p->psk))
return;
if (p2p_dev_addr) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: New PSK for addr=" MACSTR
" p2p_dev_addr=" MACSTR,
MAC2STR(mac_addr), MAC2STR(p2p_dev_addr));
if (is_zero_ether_addr(p2p_dev_addr))
p2p_dev_addr = NULL;
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: New PSK for addr=" MACSTR,
MAC2STR(mac_addr));
}
if (ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: new_psk_cb during group formation");
/* To be added to persistent group once created */
if (wpa_s->global->add_psk == NULL) {
wpa_s->global->add_psk = os_zalloc(sizeof(*p));
if (wpa_s->global->add_psk == NULL)
return;
}
p = wpa_s->global->add_psk;
if (p2p_dev_addr) {
p->p2p = 1;
os_memcpy(p->addr, p2p_dev_addr, ETH_ALEN);
} else {
p->p2p = 0;
os_memcpy(p->addr, mac_addr, ETH_ALEN);
}
os_memcpy(p->psk, psk, psk_len);
return;
}
if (ssid->mode != WPAS_MODE_P2P_GO || !ssid->p2p_persistent_group) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Ignore new_psk_cb on not-persistent GO");
return;
}
persistent = wpas_p2p_get_persistent(wpa_s->parent, NULL, ssid->ssid,
ssid->ssid_len);
if (!persistent) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not find persistent group information to store the new PSK");
return;
}
p = os_zalloc(sizeof(*p));
if (p == NULL)
return;
if (p2p_dev_addr) {
p->p2p = 1;
os_memcpy(p->addr, p2p_dev_addr, ETH_ALEN);
} else {
p->p2p = 0;
os_memcpy(p->addr, mac_addr, ETH_ALEN);
}
os_memcpy(p->psk, psk, psk_len);
if (dl_list_len(&persistent->psk_list) > P2P_MAX_STORED_CLIENTS &&
(last = dl_list_last(&persistent->psk_list,
struct psk_list_entry, list))) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove oldest PSK entry for "
MACSTR " (p2p=%u) to make room for a new one",
MAC2STR(last->addr), last->p2p);
dl_list_del(&last->list);
os_free(last);
}
wpas_p2p_remove_psk_entry(wpa_s->parent, persistent,
p2p_dev_addr ? p2p_dev_addr : mac_addr,
p2p_dev_addr == NULL);
if (p2p_dev_addr) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for p2p_dev_addr="
MACSTR, MAC2STR(p2p_dev_addr));
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for addr=" MACSTR,
MAC2STR(mac_addr));
}
dl_list_add(&persistent->psk_list, &p->list);
if (wpa_s->parent->conf->update_config &&
wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf))
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
}
static void wpas_p2p_remove_psk(struct wpa_supplicant *wpa_s,
struct wpa_ssid *s, const u8 *addr,
int iface_addr)
{
int res;
res = wpas_p2p_remove_psk_entry(wpa_s, s, addr, iface_addr);
if (res > 0 && wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf))
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Failed to update configuration");
}
static void wpas_p2p_remove_client_go(struct wpa_supplicant *wpa_s,
const u8 *peer, int iface_addr)
{
struct hostapd_data *hapd;
struct hostapd_wpa_psk *psk, *prev, *rem;
struct sta_info *sta;
if (wpa_s->ap_iface == NULL || wpa_s->current_ssid == NULL ||
wpa_s->current_ssid->mode != WPAS_MODE_P2P_GO)
return;
/* Remove per-station PSK entry */
hapd = wpa_s->ap_iface->bss[0];
prev = NULL;
psk = hapd->conf->ssid.wpa_psk;
while (psk) {
if ((iface_addr && os_memcmp(peer, psk->addr, ETH_ALEN) == 0) ||
(!iface_addr &&
os_memcmp(peer, psk->p2p_dev_addr, ETH_ALEN) == 0)) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove operating group PSK entry for "
MACSTR " iface_addr=%d",
MAC2STR(peer), iface_addr);
if (prev)
prev->next = psk->next;
else
hapd->conf->ssid.wpa_psk = psk->next;
rem = psk;
psk = psk->next;
os_free(rem);
} else {
prev = psk;
psk = psk->next;
}
}
/* Disconnect from group */
if (iface_addr)
sta = ap_get_sta(hapd, peer);
else
sta = ap_get_sta_p2p(hapd, peer);
if (sta) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Disconnect peer " MACSTR
" (iface_addr=%d) from group",
MAC2STR(peer), iface_addr);
hostapd_drv_sta_deauth(hapd, sta->addr,
WLAN_REASON_DEAUTH_LEAVING);
ap_sta_deauthenticate(hapd, sta, WLAN_REASON_DEAUTH_LEAVING);
}
}
void wpas_p2p_remove_client(struct wpa_supplicant *wpa_s, const u8 *peer,
int iface_addr)
{
struct wpa_ssid *s;
struct wpa_supplicant *w;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove client " MACSTR, MAC2STR(peer));
/* Remove from any persistent group */
for (s = wpa_s->parent->conf->ssid; s; s = s->next) {
if (s->disabled != 2 || s->mode != WPAS_MODE_P2P_GO)
continue;
if (!iface_addr)
wpas_remove_persistent_peer(wpa_s, s, peer, 0);
wpas_p2p_remove_psk(wpa_s->parent, s, peer, iface_addr);
}
/* Remove from any operating group */
for (w = wpa_s->global->ifaces; w; w = w->next)
wpas_p2p_remove_client_go(w, peer, iface_addr);
}
static void wpas_p2p_psk_failure_removal(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_PSK_FAILURE);
}
static void wpas_p2p_group_freq_conflict(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_printf(MSG_DEBUG, "P2P: Frequency conflict - terminate group");
wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_FREQ_CONFLICT);
}
int wpas_p2p_handle_frequency_conflicts(struct wpa_supplicant *wpa_s, int freq,
struct wpa_ssid *ssid)
{
struct wpa_supplicant *iface;
for (iface = wpa_s->global->ifaces; iface; iface = iface->next) {
if (!iface->current_ssid ||
iface->current_ssid->frequency == freq ||
(iface->p2p_group_interface == NOT_P2P_GROUP_INTERFACE &&
!iface->current_ssid->p2p_group))
continue;
/* Remove the connection with least priority */
if (!wpas_is_p2p_prioritized(iface)) {
/* STA connection has priority over existing
* P2P connection, so remove the interface. */
wpa_printf(MSG_DEBUG, "P2P: Removing P2P connection due to single channel concurrent mode frequency conflict");
eloop_register_timeout(0, 0,
wpas_p2p_group_freq_conflict,
iface, NULL);
/* If connection in progress is P2P connection, do not
* proceed for the connection. */
if (wpa_s == iface)
return -1;
else
return 0;
} else {
/* P2P connection has priority, disable the STA network
*/
wpa_supplicant_disable_network(wpa_s->global->ifaces,
ssid);
wpa_msg(wpa_s->global->ifaces, MSG_INFO,
WPA_EVENT_FREQ_CONFLICT " id=%d", ssid->id);
os_memset(wpa_s->global->ifaces->pending_bssid, 0,
ETH_ALEN);
/* If P2P connection is in progress, continue
* connecting...*/
if (wpa_s == iface)
return 0;
else
return -1;
}
}
return 0;
}
int wpas_p2p_4way_hs_failed(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
if (ssid == NULL || !ssid->p2p_group)
return 0;
if (wpa_s->p2p_last_4way_hs_fail &&
wpa_s->p2p_last_4way_hs_fail == ssid) {
u8 go_dev_addr[ETH_ALEN];
struct wpa_ssid *persistent;
if (wpas_p2p_persistent_group(wpa_s, go_dev_addr,
ssid->ssid,
ssid->ssid_len) <= 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not determine whether 4-way handshake failures were for a persistent group");
goto disconnect;
}
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Two 4-way handshake failures for a P2P group - go_dev_addr="
MACSTR, MAC2STR(go_dev_addr));
persistent = wpas_p2p_get_persistent(wpa_s->parent, go_dev_addr,
ssid->ssid,
ssid->ssid_len);
if (persistent == NULL || persistent->mode != WPAS_MODE_INFRA) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No matching persistent group stored");
goto disconnect;
}
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_PERSISTENT_PSK_FAIL "%d",
persistent->id);
disconnect:
wpa_s->p2p_last_4way_hs_fail = NULL;
/*
* Remove the group from a timeout to avoid issues with caller
* continuing to use the interface if this is on a P2P group
* interface.
*/
eloop_register_timeout(0, 0, wpas_p2p_psk_failure_removal,
wpa_s, NULL);
return 1;
}
wpa_s->p2p_last_4way_hs_fail = ssid;
return 0;
}
#ifdef CONFIG_WPS_NFC
static struct wpabuf * wpas_p2p_nfc_handover(int ndef, struct wpabuf *wsc,
struct wpabuf *p2p)
{
struct wpabuf *ret;
size_t wsc_len;
if (p2p == NULL) {
wpabuf_free(wsc);
wpa_printf(MSG_DEBUG, "P2P: No p2p buffer for handover");
return NULL;
}
wsc_len = wsc ? wpabuf_len(wsc) : 0;
ret = wpabuf_alloc(2 + wsc_len + 2 + wpabuf_len(p2p));
if (ret == NULL) {
wpabuf_free(wsc);
wpabuf_free(p2p);
return NULL;
}
wpabuf_put_be16(ret, wsc_len);
if (wsc)
wpabuf_put_buf(ret, wsc);
wpabuf_put_be16(ret, wpabuf_len(p2p));
wpabuf_put_buf(ret, p2p);
wpabuf_free(wsc);
wpabuf_free(p2p);
wpa_hexdump_buf(MSG_DEBUG,
"P2P: Generated NFC connection handover message", ret);
if (ndef && ret) {
struct wpabuf *tmp;
tmp = ndef_build_p2p(ret);
wpabuf_free(ret);
if (tmp == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Failed to NDEF encapsulate handover request");
return NULL;
}
ret = tmp;
}
return ret;
}
static int wpas_p2p_cli_freq(struct wpa_supplicant *wpa_s,
struct wpa_ssid **ssid, u8 *go_dev_addr)
{
struct wpa_supplicant *iface;
if (go_dev_addr)
os_memset(go_dev_addr, 0, ETH_ALEN);
if (ssid)
*ssid = NULL;
for (iface = wpa_s->global->ifaces; iface; iface = iface->next) {
if (iface->wpa_state < WPA_ASSOCIATING ||
iface->current_ssid == NULL || iface->assoc_freq == 0 ||
!iface->current_ssid->p2p_group ||
iface->current_ssid->mode != WPAS_MODE_INFRA)
continue;
if (ssid)
*ssid = iface->current_ssid;
if (go_dev_addr)
os_memcpy(go_dev_addr, iface->go_dev_addr, ETH_ALEN);
return iface->assoc_freq;
}
return 0;
}
struct wpabuf * wpas_p2p_nfc_handover_req(struct wpa_supplicant *wpa_s,
int ndef)
{
struct wpabuf *wsc, *p2p;
struct wpa_ssid *ssid;
u8 go_dev_addr[ETH_ALEN];
int cli_freq = wpas_p2p_cli_freq(wpa_s, &ssid, go_dev_addr);
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) {
wpa_printf(MSG_DEBUG, "P2P: P2P disabled - cannot build handover request");
return NULL;
}
if (wpa_s->conf->wps_nfc_dh_pubkey == NULL &&
wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey,
&wpa_s->conf->wps_nfc_dh_privkey) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No DH key available for handover request");
return NULL;
}
if (cli_freq == 0) {
wsc = wps_build_nfc_handover_req_p2p(
wpa_s->parent->wps, wpa_s->conf->wps_nfc_dh_pubkey);
} else
wsc = NULL;
p2p = p2p_build_nfc_handover_req(wpa_s->global->p2p, cli_freq,
go_dev_addr, ssid ? ssid->ssid : NULL,
ssid ? ssid->ssid_len : 0);
return wpas_p2p_nfc_handover(ndef, wsc, p2p);
}
struct wpabuf * wpas_p2p_nfc_handover_sel(struct wpa_supplicant *wpa_s,
int ndef, int tag)
{
struct wpabuf *wsc, *p2p;
struct wpa_ssid *ssid;
u8 go_dev_addr[ETH_ALEN];
int cli_freq = wpas_p2p_cli_freq(wpa_s, &ssid, go_dev_addr);
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return NULL;
if (!tag && wpa_s->conf->wps_nfc_dh_pubkey == NULL &&
wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey,
&wpa_s->conf->wps_nfc_dh_privkey) < 0)
return NULL;
if (cli_freq == 0) {
wsc = wps_build_nfc_handover_sel_p2p(
wpa_s->parent->wps,
tag ? wpa_s->conf->wps_nfc_dev_pw_id :
DEV_PW_NFC_CONNECTION_HANDOVER,
wpa_s->conf->wps_nfc_dh_pubkey,
tag ? wpa_s->conf->wps_nfc_dev_pw : NULL);
} else
wsc = NULL;
p2p = p2p_build_nfc_handover_sel(wpa_s->global->p2p, cli_freq,
go_dev_addr, ssid ? ssid->ssid : NULL,
ssid ? ssid->ssid_len : 0);
return wpas_p2p_nfc_handover(ndef, wsc, p2p);
}
static int wpas_p2p_nfc_join_group(struct wpa_supplicant *wpa_s,
struct p2p_nfc_params *params)
{
wpa_printf(MSG_DEBUG, "P2P: Initiate join-group based on NFC "
"connection handover (freq=%d)",
params->go_freq);
if (params->go_freq && params->go_ssid_len) {
wpa_s->p2p_wps_method = WPS_NFC;
wpa_s->pending_join_wps_method = WPS_NFC;
os_memset(wpa_s->pending_join_iface_addr, 0, ETH_ALEN);
os_memcpy(wpa_s->pending_join_dev_addr, params->go_dev_addr,
ETH_ALEN);
return wpas_p2p_join_start(wpa_s, params->go_freq,
params->go_ssid,
params->go_ssid_len);
}
return wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL,
WPS_NFC, 0, 0, 1, 0, wpa_s->conf->p2p_go_intent,
params->go_freq, -1, 0, 1, 1);
}
static int wpas_p2p_nfc_auth_join(struct wpa_supplicant *wpa_s,
struct p2p_nfc_params *params, int tag)
{
int res, persistent;
struct wpa_ssid *ssid;
wpa_printf(MSG_DEBUG, "P2P: Authorize join-group based on NFC "
"connection handover");
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
ssid = wpa_s->current_ssid;
if (ssid == NULL)
continue;
if (ssid->mode != WPAS_MODE_P2P_GO)
continue;
if (wpa_s->ap_iface == NULL)
continue;
break;
}
if (wpa_s == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not find GO interface");
return -1;
}
if (wpa_s->parent->p2p_oob_dev_pw_id !=
DEV_PW_NFC_CONNECTION_HANDOVER &&
!wpa_s->parent->p2p_oob_dev_pw) {
wpa_printf(MSG_DEBUG, "P2P: No NFC Dev Pw known");
return -1;
}
res = wpas_ap_wps_add_nfc_pw(
wpa_s, wpa_s->parent->p2p_oob_dev_pw_id,
wpa_s->parent->p2p_oob_dev_pw,
wpa_s->parent->p2p_peer_oob_pk_hash_known ?
wpa_s->parent->p2p_peer_oob_pubkey_hash : NULL);
if (res)
return res;
if (!tag) {
wpa_printf(MSG_DEBUG, "P2P: Negotiated handover - wait for peer to join without invitation");
return 0;
}
if (!params->peer ||
!(params->peer->dev_capab & P2P_DEV_CAPAB_INVITATION_PROCEDURE))
return 0;
wpa_printf(MSG_DEBUG, "P2P: Static handover - invite peer " MACSTR
" to join", MAC2STR(params->peer->p2p_device_addr));
wpa_s->global->p2p_invite_group = wpa_s;
persistent = ssid->p2p_persistent_group &&
wpas_p2p_get_persistent(wpa_s->parent,
params->peer->p2p_device_addr,
ssid->ssid, ssid->ssid_len);
wpa_s->parent->pending_invite_ssid_id = -1;
return p2p_invite(wpa_s->global->p2p, params->peer->p2p_device_addr,
P2P_INVITE_ROLE_ACTIVE_GO, wpa_s->own_addr,
ssid->ssid, ssid->ssid_len, ssid->frequency,
wpa_s->global->p2p_dev_addr, persistent, 0,
wpa_s->parent->p2p_oob_dev_pw_id);
}
static int wpas_p2p_nfc_init_go_neg(struct wpa_supplicant *wpa_s,
struct p2p_nfc_params *params,
int forced_freq)
{
wpa_printf(MSG_DEBUG, "P2P: Initiate GO Negotiation based on NFC "
"connection handover");
return wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL,
WPS_NFC, 0, 0, 0, 0, wpa_s->conf->p2p_go_intent,
forced_freq, -1, 0, 1, 1);
}
static int wpas_p2p_nfc_resp_go_neg(struct wpa_supplicant *wpa_s,
struct p2p_nfc_params *params,
int forced_freq)
{
int res;
wpa_printf(MSG_DEBUG, "P2P: Authorize GO Negotiation based on NFC "
"connection handover");
res = wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL,
WPS_NFC, 0, 0, 0, 1, wpa_s->conf->p2p_go_intent,
forced_freq, -1, 0, 1, 1);
if (res)
return res;
res = wpas_p2p_listen(wpa_s, 60);
if (res) {
p2p_unauthorize(wpa_s->global->p2p,
params->peer->p2p_device_addr);
}
return res;
}
static int wpas_p2p_nfc_connection_handover(struct wpa_supplicant *wpa_s,
const struct wpabuf *data,
int sel, int tag, int forced_freq)
{
const u8 *pos, *end;
u16 len, id;
struct p2p_nfc_params params;
int res;
os_memset(&params, 0, sizeof(params));
params.sel = sel;
wpa_hexdump_buf(MSG_DEBUG, "P2P: Received NFC tag payload", data);
pos = wpabuf_head(data);
end = pos + wpabuf_len(data);
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "P2P: Not enough data for Length of WSC "
"attributes");
return -1;
}
len = WPA_GET_BE16(pos);
pos += 2;
if (pos + len > end) {
wpa_printf(MSG_DEBUG, "P2P: Not enough data for WSC "
"attributes");
return -1;
}
params.wsc_attr = pos;
params.wsc_len = len;
pos += len;
if (end - pos < 2) {
wpa_printf(MSG_DEBUG, "P2P: Not enough data for Length of P2P "
"attributes");
return -1;
}
len = WPA_GET_BE16(pos);
pos += 2;
if (pos + len > end) {
wpa_printf(MSG_DEBUG, "P2P: Not enough data for P2P "
"attributes");
return -1;
}
params.p2p_attr = pos;
params.p2p_len = len;
pos += len;
wpa_hexdump(MSG_DEBUG, "P2P: WSC attributes",
params.wsc_attr, params.wsc_len);
wpa_hexdump(MSG_DEBUG, "P2P: P2P attributes",
params.p2p_attr, params.p2p_len);
if (pos < end) {
wpa_hexdump(MSG_DEBUG,
"P2P: Ignored extra data after P2P attributes",
pos, end - pos);
}
res = p2p_process_nfc_connection_handover(wpa_s->global->p2p, &params);
if (res)
return res;
if (params.next_step == NO_ACTION)
return 0;
if (params.next_step == BOTH_GO) {
wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_BOTH_GO "peer=" MACSTR,
MAC2STR(params.peer->p2p_device_addr));
return 0;
}
if (params.next_step == PEER_CLIENT) {
if (!is_zero_ether_addr(params.go_dev_addr)) {
wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_PEER_CLIENT
"peer=" MACSTR " freq=%d go_dev_addr=" MACSTR
" ssid=\"%s\"",
MAC2STR(params.peer->p2p_device_addr),
params.go_freq,
MAC2STR(params.go_dev_addr),
wpa_ssid_txt(params.go_ssid,
params.go_ssid_len));
} else {
wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_PEER_CLIENT
"peer=" MACSTR " freq=%d",
MAC2STR(params.peer->p2p_device_addr),
params.go_freq);
}
return 0;
}
if (wpas_p2p_cli_freq(wpa_s, NULL, NULL)) {
wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_WHILE_CLIENT "peer="
MACSTR, MAC2STR(params.peer->p2p_device_addr));
return 0;
}
wpabuf_free(wpa_s->p2p_oob_dev_pw);
wpa_s->p2p_oob_dev_pw = NULL;
if (params.oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2) {
wpa_printf(MSG_DEBUG, "P2P: No peer OOB Dev Pw "
"received");
return -1;
}
id = WPA_GET_BE16(params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN);
wpa_printf(MSG_DEBUG, "P2P: Peer OOB Dev Pw %u", id);
wpa_hexdump(MSG_DEBUG, "P2P: Peer OOB Public Key hash",
params.oob_dev_pw, WPS_OOB_PUBKEY_HASH_LEN);
os_memcpy(wpa_s->p2p_peer_oob_pubkey_hash,
params.oob_dev_pw, WPS_OOB_PUBKEY_HASH_LEN);
wpa_s->p2p_peer_oob_pk_hash_known = 1;
if (tag) {
if (id < 0x10) {
wpa_printf(MSG_DEBUG, "P2P: Static handover - invalid "
"peer OOB Device Password Id %u", id);
return -1;
}
wpa_printf(MSG_DEBUG, "P2P: Static handover - use peer OOB "
"Device Password Id %u", id);
wpa_hexdump_key(MSG_DEBUG, "P2P: Peer OOB Device Password",
params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN + 2,
params.oob_dev_pw_len -
WPS_OOB_PUBKEY_HASH_LEN - 2);
wpa_s->p2p_oob_dev_pw_id = id;
wpa_s->p2p_oob_dev_pw = wpabuf_alloc_copy(
params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN + 2,
params.oob_dev_pw_len -
WPS_OOB_PUBKEY_HASH_LEN - 2);
if (wpa_s->p2p_oob_dev_pw == NULL)
return -1;
if (wpa_s->conf->wps_nfc_dh_pubkey == NULL &&
wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey,
&wpa_s->conf->wps_nfc_dh_privkey) < 0)
return -1;
} else {
wpa_printf(MSG_DEBUG, "P2P: Using abbreviated WPS handshake "
"without Device Password");
wpa_s->p2p_oob_dev_pw_id = DEV_PW_NFC_CONNECTION_HANDOVER;
}
switch (params.next_step) {
case NO_ACTION:
case BOTH_GO:
case PEER_CLIENT:
/* already covered above */
return 0;
case JOIN_GROUP:
return wpas_p2p_nfc_join_group(wpa_s, &params);
case AUTH_JOIN:
return wpas_p2p_nfc_auth_join(wpa_s, &params, tag);
case INIT_GO_NEG:
return wpas_p2p_nfc_init_go_neg(wpa_s, &params, forced_freq);
case RESP_GO_NEG:
/* TODO: use own OOB Dev Pw */
return wpas_p2p_nfc_resp_go_neg(wpa_s, &params, forced_freq);
}
return -1;
}
int wpas_p2p_nfc_tag_process(struct wpa_supplicant *wpa_s,
const struct wpabuf *data, int forced_freq)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
return wpas_p2p_nfc_connection_handover(wpa_s, data, 1, 1, forced_freq);
}
int wpas_p2p_nfc_report_handover(struct wpa_supplicant *wpa_s, int init,
const struct wpabuf *req,
const struct wpabuf *sel, int forced_freq)
{
struct wpabuf *tmp;
int ret;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
wpa_printf(MSG_DEBUG, "NFC: P2P connection handover reported");
wpa_hexdump_ascii(MSG_DEBUG, "NFC: Req",
wpabuf_head(req), wpabuf_len(req));
wpa_hexdump_ascii(MSG_DEBUG, "NFC: Sel",
wpabuf_head(sel), wpabuf_len(sel));
if (forced_freq)
wpa_printf(MSG_DEBUG, "NFC: Forced freq %d", forced_freq);
tmp = ndef_parse_p2p(init ? sel : req);
if (tmp == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not parse NDEF");
return -1;
}
ret = wpas_p2p_nfc_connection_handover(wpa_s, tmp, init, 0,
forced_freq);
wpabuf_free(tmp);
return ret;
}
int wpas_p2p_nfc_tag_enabled(struct wpa_supplicant *wpa_s, int enabled)
{
const u8 *if_addr;
int go_intent = wpa_s->conf->p2p_go_intent;
struct wpa_supplicant *iface;
if (wpa_s->global->p2p == NULL)
return -1;
if (!enabled) {
wpa_printf(MSG_DEBUG, "P2P: Disable use of own NFC Tag");
for (iface = wpa_s->global->ifaces; iface; iface = iface->next)
{
if (!iface->ap_iface)
continue;
hostapd_wps_nfc_token_disable(iface->ap_iface->bss[0]);
}
p2p_set_authorized_oob_dev_pw_id(wpa_s->global->p2p, 0,
0, NULL);
if (wpa_s->p2p_nfc_tag_enabled)
wpas_p2p_remove_pending_group_interface(wpa_s);
wpa_s->p2p_nfc_tag_enabled = 0;
return 0;
}
if (wpa_s->global->p2p_disabled)
return -1;
if (wpa_s->conf->wps_nfc_dh_pubkey == NULL ||
wpa_s->conf->wps_nfc_dh_privkey == NULL ||
wpa_s->conf->wps_nfc_dev_pw == NULL ||
wpa_s->conf->wps_nfc_dev_pw_id < 0x10) {
wpa_printf(MSG_DEBUG, "P2P: NFC password token not configured "
"to allow static handover cases");
return -1;
}
wpa_printf(MSG_DEBUG, "P2P: Enable use of own NFC Tag");
wpa_s->p2p_oob_dev_pw_id = wpa_s->conf->wps_nfc_dev_pw_id;
wpabuf_free(wpa_s->p2p_oob_dev_pw);
wpa_s->p2p_oob_dev_pw = wpabuf_dup(wpa_s->conf->wps_nfc_dev_pw);
if (wpa_s->p2p_oob_dev_pw == NULL)
return -1;
wpa_s->p2p_peer_oob_pk_hash_known = 0;
if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO ||
wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT) {
/*
* P2P Group Interface present and the command came on group
* interface, so enable the token for the current interface.
*/
wpa_s->create_p2p_iface = 0;
} else {
wpa_s->create_p2p_iface = wpas_p2p_create_iface(wpa_s);
}
if (wpa_s->create_p2p_iface) {
enum wpa_driver_if_type iftype;
/* Prepare to add a new interface for the group */
iftype = WPA_IF_P2P_GROUP;
if (go_intent == 15)
iftype = WPA_IF_P2P_GO;
if (wpas_p2p_add_group_interface(wpa_s, iftype) < 0) {
wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new "
"interface for the group");
return -1;
}
if_addr = wpa_s->pending_interface_addr;
} else
if_addr = wpa_s->own_addr;
wpa_s->p2p_nfc_tag_enabled = enabled;
for (iface = wpa_s->global->ifaces; iface; iface = iface->next) {
struct hostapd_data *hapd;
if (iface->ap_iface == NULL)
continue;
hapd = iface->ap_iface->bss[0];
wpabuf_free(hapd->conf->wps_nfc_dh_pubkey);
hapd->conf->wps_nfc_dh_pubkey =
wpabuf_dup(wpa_s->conf->wps_nfc_dh_pubkey);
wpabuf_free(hapd->conf->wps_nfc_dh_privkey);
hapd->conf->wps_nfc_dh_privkey =
wpabuf_dup(wpa_s->conf->wps_nfc_dh_privkey);
wpabuf_free(hapd->conf->wps_nfc_dev_pw);
hapd->conf->wps_nfc_dev_pw =
wpabuf_dup(wpa_s->conf->wps_nfc_dev_pw);
hapd->conf->wps_nfc_dev_pw_id = wpa_s->conf->wps_nfc_dev_pw_id;
if (hostapd_wps_nfc_token_enable(iface->ap_iface->bss[0]) < 0) {
wpa_dbg(iface, MSG_DEBUG,
"P2P: Failed to enable NFC Tag for GO");
}
}
p2p_set_authorized_oob_dev_pw_id(
wpa_s->global->p2p, wpa_s->conf->wps_nfc_dev_pw_id, go_intent,
if_addr);
return 0;
}
#endif /* CONFIG_WPS_NFC */
static void wpas_p2p_optimize_listen_channel(struct wpa_supplicant *wpa_s,
struct wpa_used_freq_data *freqs,
unsigned int num)
{
u8 curr_chan, cand, chan;
unsigned int i;
curr_chan = p2p_get_listen_channel(wpa_s->global->p2p);
for (i = 0, cand = 0; i < num; i++) {
ieee80211_freq_to_chan(freqs[i].freq, &chan);
if (curr_chan == chan) {
cand = 0;
break;
}
if (chan == 1 || chan == 6 || chan == 11)
cand = chan;
}
if (cand) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Update Listen channel to %u baased on operating channel",
cand);
p2p_set_listen_channel(wpa_s->global->p2p, 81, cand, 0);
}
}
void wpas_p2p_indicate_state_change(struct wpa_supplicant *wpa_s)
{
struct wpa_used_freq_data *freqs;
unsigned int num = wpa_s->num_multichan_concurrent;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
/*
* If possible, optimize the Listen channel to be a channel that is
* already used by one of the other interfaces.
*/
if (!wpa_s->conf->p2p_optimize_listen_chan)
return;
if (!wpa_s->current_ssid || wpa_s->wpa_state != WPA_COMPLETED)
return;
freqs = os_calloc(num, sizeof(struct wpa_used_freq_data));
if (!freqs)
return;
num = get_shared_radio_freqs_data(wpa_s, freqs, num);
wpas_p2p_optimize_listen_channel(wpa_s, freqs, num);
os_free(freqs);
}
void wpas_p2p_deinit_iface(struct wpa_supplicant *wpa_s)
{
if (wpa_s == wpa_s->parent)
wpas_p2p_group_remove(wpa_s, "*");
if (wpa_s == wpa_s->global->p2p_init_wpa_s && wpa_s->global->p2p) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Disable P2P since removing "
"the management interface is being removed");
wpas_p2p_deinit_global(wpa_s->global);
}
}
void wpas_p2p_ap_deinit(struct wpa_supplicant *wpa_s)
{
if (wpa_s->ap_iface->bss)
wpa_s->ap_iface->bss[0]->p2p_group = NULL;
wpas_p2p_group_deinit(wpa_s);
}
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