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hostap/wpa_supplicant/p2p_supplicant.c
Jouni Malinen a5f40eff18 Track whether scan was started by us or an external program 
This can be used to improve scan behavior in cases external programs
request scans directly from the driver.

Signed-hostap: Jouni Malinen <j@w1.fi>
2013-12-26 18:27:48 +02:00

6663 lines
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/*
* wpa_supplicant - P2P
* Copyright (c) 2009-2010, Atheros Communications
*
* 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/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.
*/
#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 */
#ifndef P2P_CONCURRENT_SEARCH_DELAY
#define P2P_CONCURRENT_SEARCH_DELAY 500
#endif /* P2P_CONCURRENT_SEARCH_DELAY */
#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);
static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq);
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);
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);
/*
* 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 int wpas_p2p_valid_oper_freqs(struct wpa_supplicant *wpa_s,
int *p2p_freqs, unsigned int len)
{
int *freqs;
unsigned int num, i, j;
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_memset(p2p_freqs, 0, sizeof(int) * len);
for (i = 0, j = 0; i < num && j < len; i++) {
if (p2p_supported_freq(wpa_s->global->p2p, freqs[i]))
p2p_freqs[j++] = freqs[i];
}
os_free(freqs);
dump_freq_array(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->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 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_supplicant *ifs;
struct wpa_driver_scan_params params;
int ret;
struct wpabuf *wps_ie, *ies;
int social_channels[] = { 2412, 2437, 2462, 0, 0 };
size_t ielen;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs->sta_scan_pending &&
(wpas_scan_scheduled(ifs) || ifs->scanning) &&
wpas_p2p_in_progress(wpa_s) == 2) {
wpa_printf(MSG_DEBUG, "Delaying P2P scan to allow "
"pending station mode scan to be "
"completed on interface %s", ifs->ifname);
wpa_s->global->p2p_cb_on_scan_complete = 1;
wpa_supplicant_req_scan(ifs, 0, 0);
return 1;
}
}
os_memset(&params, 0, sizeof(params));
/* P2P Wildcard SSID */
params.num_ssids = 1;
params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID;
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)
return -1;
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);
return -1;
}
wpabuf_put_buf(ies, wps_ie);
wpabuf_free(wps_ie);
p2p_scan_ie(wpa_s->global->p2p, ies, dev_id);
params.p2p_probe = 1;
params.extra_ies = wpabuf_head(ies);
params.extra_ies_len = wpabuf_len(ies);
switch (type) {
case P2P_SCAN_SOCIAL:
params.freqs = social_channels;
break;
case P2P_SCAN_FULL:
break;
case P2P_SCAN_SOCIAL_PLUS_ONE:
social_channels[3] = freq;
params.freqs = social_channels;
break;
}
ret = wpa_drv_scan(wpa_s, &params);
wpabuf_free(ies);
if (ret) {
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs->scanning ||
ifs->scan_res_handler == wpas_p2p_scan_res_handler) {
wpa_s->global->p2p_cb_on_scan_complete = 1;
ret = 1;
break;
}
}
} else {
os_get_reltime(&wpa_s->scan_trigger_time);
wpa_s->scan_res_handler = wpas_p2p_scan_res_handler;
wpa_s->own_scan_requested = 1;
}
return ret;
}
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;
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
gtype = "client";
} else
gtype = "GO";
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;
}
/*
* 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 (removal_reason != P2P_GROUP_REMOVAL_SILENT && ssid)
wpas_notify_p2p_group_removed(wpa_s, ssid, gtype);
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_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);
wpa_s->sta_scan_pending = 0;
} 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) {
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;
}
#ifndef CONFIG_NO_CONFIG_WRITE
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");
}
#endif /* CONFIG_NO_CONFIG_WRITE */
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) {
/* 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);
}
#ifndef CONFIG_NO_CONFIG_WRITE
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");
#endif /* CONFIG_NO_CONFIG_WRITE */
}
static void wpas_group_formation_completed(struct wpa_supplicant *wpa_s,
int success)
{
struct wpa_ssid *ssid;
const char *ssid_txt;
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;
}
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) {
ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len);
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 {
ssid_txt = "";
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 if (ssid && ssid->passphrase == NULL && ssid->psk_set) {
char psk[65];
wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32);
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d psk=%s go_dev_addr="
MACSTR "%s",
wpa_s->ifname, ssid_txt, ssid->frequency, psk,
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "");
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
} else {
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d passphrase=\"%s\" "
"go_dev_addr=" MACSTR "%s",
wpa_s->ifname, ssid_txt,
ssid ? ssid->frequency : 0,
ssid && ssid->passphrase ? ssid->passphrase : "",
MAC2STR(go_dev_addr),
persistent ? " [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);
}
}
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;
if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled)
return;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
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 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;
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;
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,
MAC2STR(res->peer_interface_addr));
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);
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;
if (os_strlen(params->passphrase) > 0) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d "
"passphrase=\"%s\" go_dev_addr=" MACSTR
"%s", wpa_s->ifname,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len),
ssid->frequency, params->passphrase,
MAC2STR(wpa_s->global->p2p_dev_addr),
params->persistent_group ?
" [PERSISTENT]" : "");
} else {
char psk[65];
wpa_snprintf_hex(psk, sizeof(psk), params->psk,
sizeof(params->psk));
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d psk=%s "
"go_dev_addr=" MACSTR "%s",
wpa_s->ifname,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len),
ssid->frequency, psk,
MAC2STR(wpa_s->global->p2p_dev_addr),
params->persistent_group ?
" [PERSISTENT]" : "");
}
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);
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->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->disassoc_low_ack = s->disassoc_low_ack;
d->disable_scan_offload = s->disable_scan_offload;
}
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);
else if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
wpa_drv_p2p_group_formation_failed(wpa_s);
wpas_group_formation_completed(wpa_s, 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);
}
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);
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);
}
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);
}
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",
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 : "");
#endif /* CONFIG_NO_STDOUT_DEBUG */
os_free(wfd_dev_info_hex);
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);
}
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;
wpa_drv_set_ap_wps_ie(wpa_s, NULL, 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");
return -1;
}
wpa_s->pending_listen_freq = freq;
wpa_s->pending_listen_duration = duration;
if (wpa_drv_remain_on_channel(wpa_s, freq, duration) < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver "
"to remain on channel (%u MHz) for Listen "
"state", freq);
wpa_s->pending_listen_freq = 0;
return -1;
}
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = freq;
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);
}
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 */
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);
}
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_sd_request(wpa_s, dst, 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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return 0;
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_sd_cancel_request(wpa_s, 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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
wpa_drv_p2p_sd_response(wpa_s, freq, dst, dialog_token,
resp_tlvs);
return;
}
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
wpa_drv_p2p_service_update(wpa_s);
return;
}
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);
}
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);
}
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);
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);
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);
}
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)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *s;
int res;
struct wpa_supplicant *grp;
if (!persistent_group) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR
" to join an active group", MAC2STR(sa));
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;
}
/*
* 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");
} 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);
/* Get one of the frequencies currently in use */
if (wpas_p2p_valid_oper_freqs(wpa_s, &res, 1) > 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, res);
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 = res;
}
}
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",
MAC2STR(sa), op_freq);
if (s) {
int go = s->mode == WPAS_MODE_P2P_GO;
wpas_p2p_group_add_persistent(
wpa_s, s, go, go ? op_freq : 0, 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);
}
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) {
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--;
#ifndef CONFIG_NO_CONFIG_WRITE
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");
#endif /* CONFIG_NO_CONFIG_WRITE */
}
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)
{
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);
freq = wpa_s->p2p_persistent_go_freq;
if (neg_freq > 0 && ssid->mode == WPAS_MODE_P2P_GO &&
freq_included(channels, neg_freq)) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use frequence %d MHz from invitation for GO mode",
neg_freq);
freq = neg_freq;
}
wpas_p2p_group_add_persistent(wpa_s, ssid,
ssid->mode == WPAS_MODE_P2P_GO,
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)
{
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;
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);
}
static int wpas_go_connected(void *ctx, const u8 *dev_addr)
{
struct wpa_supplicant *wpa_s = ctx;
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, dev_addr, ETH_ALEN) == 0)
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;
iface.confname = wpa_s->confname;
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;
}
/**
* 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;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
struct p2p_params params;
wpa_printf(MSG_DEBUG, "P2P: Use driver-based P2P management");
os_memset(&params, 0, sizeof(params));
params.dev_name = wpa_s->conf->device_name;
os_memcpy(params.pri_dev_type, wpa_s->conf->device_type,
WPS_DEV_TYPE_LEN);
params.num_sec_dev_types = wpa_s->conf->num_sec_device_types;
os_memcpy(params.sec_dev_type,
wpa_s->conf->sec_device_type,
params.num_sec_dev_types * WPS_DEV_TYPE_LEN);
if (wpa_drv_p2p_set_params(wpa_s, &params) < 0)
return -1;
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;
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;
} else {
p2p.reg_class = 81;
/*
* Pick one of the social channels randomly as the listen
* channel.
*/
os_get_random((u8 *) &r, sizeof(r));
p2p.channel = 1 + (r % 3) * 5;
}
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.
*/
os_get_random((u8 *) &r, sizeof(r));
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;
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_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);
/* 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.
*/
void wpas_p2p_deinit_global(struct wpa_global *global)
{
struct wpa_supplicant *wpa_s, *tmp;
wpa_s = global->ifaces;
if (wpa_s)
wpas_p2p_service_flush(wpa_s);
if (global->p2p == NULL)
return;
/* 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;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
return wpa_drv_p2p_connect(wpa_s, peer_addr, wps_method,
go_intent, own_interface_addr,
force_freq, persistent_group);
}
/*
* 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);
}
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;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return -1;
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);
}
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 *freqs, res, num, i;
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(int));
if (!freqs)
return 1;
num = wpas_p2p_valid_oper_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
if (num < 0) {
res = 1;
goto exit_free;
}
for (i = 0; i < num; i++) {
if (freqs[i] == 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;
}
}
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;
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);
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_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);
}
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);
}
static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq)
{
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;
params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID;
params.ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN;
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 > 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);
}
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)
{
wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface "
MACSTR " dev " MACSTR ")%s",
MAC2STR(iface_addr), MAC2STR(dev_addr),
auto_join ? " (auto_join)" : "");
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(wpa_s, NULL);
return 0;
}
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s)
{
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_interface_addr, wpa_s->pending_join_iface_addr,
ETH_ALEN);
res.wps_method = wpa_s->pending_join_wps_method;
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)
{
int *freqs, res;
unsigned int freq_in_use = 0, num, i;
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);
wpa_printf(MSG_DEBUG,
"P2P: Setup freqs: freq=%d num_MCC=%d shared_freqs=%u",
freq, wpa_s->num_multichan_concurrent, num);
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_in_use = 1;
}
if (num == wpa_s->num_multichan_concurrent && !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;
}
for (i = 0; i < num; i++) {
if (!p2p_supported_freq(wpa_s->global->p2p, freqs[i]))
continue;
if (*pref_freq == 0 && num < wpa_s->num_multichan_concurrent) {
wpa_printf(MSG_DEBUG, "P2P: Try to prefer a frequency (%u MHz) we are already using",
freqs[i]);
*pref_freq = freqs[i];
} else {
wpa_printf(MSG_DEBUG, "P2P: Try to force us to use frequency (%u MHz) which is already in use",
freqs[i]);
*force_freq = freqs[i];
}
break;
}
if (i == num) {
if (num < wpa_s->num_multichan_concurrent && num > 0) {
wpa_printf(MSG_DEBUG, "P2P: Current operating channels are not available for P2P. Try to use another channel");
*force_freq = 0;
} else if (num < wpa_s->num_multichan_concurrent) {
wpa_printf(MSG_DEBUG, "P2P: No current operating channels - try to use a new 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;
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) < 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;
}
}
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;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_listen(wpa_s, timeout);
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));
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 {
os_get_random((u8 *) &r, sizeof(r));
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 {
os_get_random((u8 *) &r, sizeof(r));
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_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)
{
int res, *freqs;
unsigned int pref_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 {
int chan;
for (chan = 0; chan < 11; chan++) {
params->freq = 2412 + chan * 5;
if (!wpas_p2p_disallowed_freq(wpa_s->global,
params->freq) &&
freq_included(channels, params->freq))
break;
}
if (chan == 11) {
wpa_printf(MSG_DEBUG, "P2P: No 2.4 GHz channel "
"allowed");
return -1;
}
wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz (no preference "
"known)", params->freq);
}
freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int));
if (!freqs)
return -1;
res = wpas_p2p_valid_oper_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
if (res < 0) {
os_free(freqs);
return -1;
}
num = res;
for (i = 0; i < num; i++) {
if (freq && freqs[i] == freq)
break;
if (!freq && freq_included(channels, freqs[i])) {
wpa_printf(MSG_DEBUG, "P2P: Force GO on a channel we are already using (%u MHz)",
freqs[i]);
params->freq = freqs[i];
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);
else
wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using");
os_free(freqs);
return -1;
} else if (num == 0) {
wpa_printf(MSG_DEBUG, "P2P: Use one of the free channels");
} else {
wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using. 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)
{
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_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 freq, int ht40, int vht,
const struct p2p_channels *channels,
int connection_timeout)
{
struct p2p_go_neg_results params;
int go = 0;
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 (ssid->mode == WPAS_MODE_INFRA)
return wpas_start_p2p_client(wpa_s, ssid, addr_allocated);
if (ssid->mode != WPAS_MODE_P2P_GO)
return -1;
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, 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)
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return NULL;
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->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);
else if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
wpa_drv_wps_success_cb(wpa_s, 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);
}
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
return wpa_drv_p2p_prov_disc_req(wpa_s, peer_addr,
config_methods,
use == WPAS_P2P_PD_FOR_JOIN);
}
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;
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_find(wpa_s, timeout, type);
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);
wpa_s->global->p2p_cb_on_scan_complete = 0;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
wpa_drv_p2p_stop_find(wpa_s);
return 1;
}
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->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);
}
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_reject(wpa_s, addr);
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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_invite(wpa_s, peer_addr, role, bssid,
ssid->ssid, ssid->ssid_len,
go_dev_addr, 1);
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);
}
/* 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->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_invite(wpa_s, peer_addr, role, bssid,
ssid->ssid, ssid->ssid_len,
go_dev_addr, persistent);
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);
}
void wpas_p2p_completed(struct wpa_supplicant *wpa_s)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
const char *ssid_txt;
u8 go_dev_addr[ETH_ALEN];
int network_id = -1;
int persistent;
int freq;
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)
goto done;
wpa_s->show_group_started = 0;
ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len);
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;
if (ssid->passphrase == NULL && ssid->psk_set) {
char psk[65];
wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32);
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s client ssid=\"%s\" freq=%d psk=%s "
"go_dev_addr=" MACSTR "%s",
wpa_s->ifname, ssid_txt, freq, psk,
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "");
} else {
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s client ssid=\"%s\" freq=%d "
"passphrase=\"%s\" go_dev_addr=" MACSTR "%s",
wpa_s->ifname, ssid_txt, freq,
ssid->passphrase ? ssid->passphrase : "",
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "");
}
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);
done:
wpas_p2p_continue_after_scan(wpa_s);
}
int wpas_p2p_presence_req(struct wpa_supplicant *wpa_s, u32 duration1,
u32 interval1, u32 duration2, u32 interval2)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return -1;
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;
return p2p_presence_req(wpa_s->global->p2p, wpa_s->bssid,
wpa_s->own_addr, wpa_s->assoc_freq,
duration1, interval1, duration2, interval2);
}
int wpas_p2p_ext_listen(struct wpa_supplicant *wpa_s, unsigned int period,
unsigned int interval)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return -1;
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 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
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 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
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;
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;
} else {
reg_class = 81;
/*
* Pick one of the social channels randomly as the
* listen channel.
*/
os_get_random((u8 *) &r, sizeof(r));
channel = 1 + (r % 3) * 5;
}
ret = p2p_set_listen_channel(p2p, reg_class, channel);
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.
*/
os_get_random((u8 *) &r, sizeof(r));
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");
}
}
}
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;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
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_update_channel_list(struct wpa_supplicant *wpa_s)
{
struct p2p_channels chan, cli_chan;
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);
}
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;
}
}
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 || (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT))
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 || (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT))
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->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",
P2P_CONCURRENT_SEARCH_DELAY);
return P2P_CONCURRENT_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",
P2P_CONCURRENT_SEARCH_DELAY, ifs->ifname);
return P2P_CONCURRENT_SEARCH_DELAY;
}
}
return 0;
}
void wpas_p2p_continue_after_scan(struct wpa_supplicant *wpa_s)
{
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Station mode scan operation not "
"pending anymore (sta_scan_pending=%d "
"p2p_cb_on_scan_complete=%d)", wpa_s->sta_scan_pending,
wpa_s->global->p2p_cb_on_scan_complete);
wpa_s->sta_scan_pending = 0;
if (!wpa_s->global->p2p_cb_on_scan_complete)
return;
wpa_s->global->p2p_cb_on_scan_complete = 0;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (p2p_other_scan_completed(wpa_s->global->p2p) == 1) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Pending P2P operation "
"continued after successful connection");
p2p_increase_search_delay(wpa_s->global->p2p,
wpas_p2p_search_delay(wpa_s));
}
}
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;
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) {
struct psk_list_entry *last;
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);
#ifndef CONFIG_NO_CONFIG_WRITE
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");
#endif /* CONFIG_NO_CONFIG_WRITE */
}
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) {
#ifndef CONFIG_NO_CONFIG_WRITE
if (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");
#endif /* CONFIG_NO_CONFIG_WRITE */
}
}
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;
}
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