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hostap/src/drivers/driver_nl80211.c
Jouni Malinen f2ed8023c4 nl80211: Track used interfaces and support multiple P2P groups 
Track all the P2P group interfaces within driver_nl80211.c to make
it easier to generate unique P2P Interface Addresses.
2010-11-26 18:14:51 +02:00

6161 lines
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/*
* Driver interaction with Linux nl80211/cfg80211
* Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
* Copyright (c) 2003-2004, Instant802 Networks, Inc.
* Copyright (c) 2005-2006, Devicescape Software, Inc.
* Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
* Copyright (c) 2009-2010, Atheros Communications
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/filter.h>
#include "nl80211_copy.h"
#include "common.h"
#include "eloop.h"
#include "utils/list.h"
#include "common/ieee802_11_defs.h"
#include "netlink.h"
#include "linux_ioctl.h"
#include "radiotap.h"
#include "radiotap_iter.h"
#include "rfkill.h"
#include "driver.h"
#ifdef CONFIG_LIBNL20
/* libnl 2.0 compatibility code */
#define nl_handle nl_sock
#define nl80211_handle_alloc nl_socket_alloc_cb
#define nl80211_handle_destroy nl_socket_free
#else
/*
* libnl 1.1 has a bug, it tries to allocate socket numbers densely
* but when you free a socket again it will mess up its bitmap and
* and use the wrong number the next time it needs a socket ID.
* Therefore, we wrap the handle alloc/destroy and add our own pid
* accounting.
*/
static uint32_t port_bitmap[32] = { 0 };
static struct nl_handle *nl80211_handle_alloc(void *cb)
{
struct nl_handle *handle;
uint32_t pid = getpid() & 0x3FFFFF;
int i;
handle = nl_handle_alloc_cb(cb);
for (i = 0; i < 1024; i++) {
if (port_bitmap[i / 32] & (1 << (i % 32)))
continue;
port_bitmap[i / 32] |= 1 << (i % 32);
pid += i << 22;
break;
}
nl_socket_set_local_port(handle, pid);
return handle;
}
static void nl80211_handle_destroy(struct nl_handle *handle)
{
uint32_t port = nl_socket_get_local_port(handle);
port >>= 22;
port_bitmap[port / 32] &= ~(1 << (port % 32));
nl_handle_destroy(handle);
}
#endif /* CONFIG_LIBNL20 */
#ifndef IFF_LOWER_UP
#define IFF_LOWER_UP 0x10000 /* driver signals L1 up */
#endif
#ifndef IFF_DORMANT
#define IFF_DORMANT 0x20000 /* driver signals dormant */
#endif
#ifndef IF_OPER_DORMANT
#define IF_OPER_DORMANT 5
#endif
#ifndef IF_OPER_UP
#define IF_OPER_UP 6
#endif
struct nl80211_global {
struct dl_list interfaces;
};
struct i802_bss {
struct wpa_driver_nl80211_data *drv;
struct i802_bss *next;
int ifindex;
char ifname[IFNAMSIZ + 1];
unsigned int beacon_set:1;
};
struct wpa_driver_nl80211_data {
struct nl80211_global *global;
struct dl_list list;
u8 addr[ETH_ALEN];
void *ctx;
struct netlink_data *netlink;
int ioctl_sock; /* socket for ioctl() use */
char brname[IFNAMSIZ];
int ifindex;
int if_removed;
int if_disabled;
struct rfkill_data *rfkill;
struct wpa_driver_capa capa;
int has_capability;
int operstate;
int scan_complete_events;
struct nl_handle *nl_handle;
struct nl_handle *nl_handle_event;
struct nl_handle *nl_handle_preq;
struct nl_cache *nl_cache;
struct nl_cache *nl_cache_event;
struct nl_cache *nl_cache_preq;
struct nl_cb *nl_cb;
struct genl_family *nl80211;
u8 auth_bssid[ETH_ALEN];
u8 bssid[ETH_ALEN];
int associated;
u8 ssid[32];
size_t ssid_len;
int nlmode;
int ap_scan_as_station;
unsigned int assoc_freq;
int monitor_sock;
int monitor_ifidx;
int disable_11b_rates;
unsigned int pending_remain_on_chan:1;
unsigned int added_bridge:1;
unsigned int added_if_into_bridge:1;
u64 remain_on_chan_cookie;
u64 send_action_cookie;
unsigned int last_mgmt_freq;
struct wpa_driver_scan_filter *filter_ssids;
size_t num_filter_ssids;
struct i802_bss first_bss;
#ifdef HOSTAPD
int eapol_sock; /* socket for EAPOL frames */
int default_if_indices[16];
int *if_indices;
int num_if_indices;
int last_freq;
int last_freq_ht;
#endif /* HOSTAPD */
};
static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
void *timeout_ctx);
static int wpa_driver_nl80211_set_mode(void *priv, int mode);
static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
const u8 *addr, int cmd, u16 reason_code,
int local_state_change);
static void nl80211_remove_monitor_interface(
struct wpa_driver_nl80211_data *drv);
static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
unsigned int freq, const u8 *buf,
size_t buf_len, u64 *cookie);
static int wpa_driver_nl80211_probe_req_report(void *priv, int report);
#ifdef HOSTAPD
static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static int wpa_driver_nl80211_if_remove(void *priv,
enum wpa_driver_if_type type,
const char *ifname);
#else /* HOSTAPD */
static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
return 0;
}
#endif /* HOSTAPD */
static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
int ifindex, int disabled);
/* nl80211 code */
static int ack_handler(struct nl_msg *msg, void *arg)
{
int *err = arg;
*err = 0;
return NL_STOP;
}
static int finish_handler(struct nl_msg *msg, void *arg)
{
int *ret = arg;
*ret = 0;
return NL_SKIP;
}
static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
void *arg)
{
int *ret = arg;
*ret = err->error;
return NL_SKIP;
}
static int no_seq_check(struct nl_msg *msg, void *arg)
{
return NL_OK;
}
static int send_and_recv(struct wpa_driver_nl80211_data *drv,
struct nl_handle *nl_handle, struct nl_msg *msg,
int (*valid_handler)(struct nl_msg *, void *),
void *valid_data)
{
struct nl_cb *cb;
int err = -ENOMEM;
cb = nl_cb_clone(drv->nl_cb);
if (!cb)
goto out;
err = nl_send_auto_complete(nl_handle, msg);
if (err < 0)
goto out;
err = 1;
nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
if (valid_handler)
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
valid_handler, valid_data);
while (err > 0)
nl_recvmsgs(nl_handle, cb);
out:
nl_cb_put(cb);
nlmsg_free(msg);
return err;
}
static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
struct nl_msg *msg,
int (*valid_handler)(struct nl_msg *, void *),
void *valid_data)
{
return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
valid_data);
}
struct family_data {
const char *group;
int id;
};
static int family_handler(struct nl_msg *msg, void *arg)
{
struct family_data *res = arg;
struct nlattr *tb[CTRL_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *mcgrp;
int i;
nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[CTRL_ATTR_MCAST_GROUPS])
return NL_SKIP;
nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
nla_len(mcgrp), NULL);
if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
!tb2[CTRL_ATTR_MCAST_GRP_ID] ||
os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
res->group,
nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
continue;
res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
break;
};
return NL_SKIP;
}
static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
const char *family, const char *group)
{
struct nl_msg *msg;
int ret = -1;
struct family_data res = { group, -ENOENT };
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
0, 0, CTRL_CMD_GETFAMILY, 0);
NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
ret = send_and_recv_msgs(drv, msg, family_handler, &res);
msg = NULL;
if (ret == 0)
ret = res.id;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (!drv->associated)
return -1;
os_memcpy(bssid, drv->bssid, ETH_ALEN);
return 0;
}
static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (!drv->associated)
return -1;
os_memcpy(ssid, drv->ssid, drv->ssid_len);
return drv->ssid_len;
}
static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
char *buf, size_t len, int del)
{
union wpa_event_data event;
os_memset(&event, 0, sizeof(event));
if (len > sizeof(event.interface_status.ifname))
len = sizeof(event.interface_status.ifname) - 1;
os_memcpy(event.interface_status.ifname, buf, len);
event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
EVENT_INTERFACE_ADDED;
wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
del ? "DEL" : "NEW",
event.interface_status.ifname,
del ? "removed" : "added");
if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
if (del)
drv->if_removed = 1;
else
drv->if_removed = 0;
}
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
}
static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
u8 *buf, size_t len)
{
int attrlen, rta_len;
struct rtattr *attr;
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
== 0)
return 1;
else
break;
}
attr = RTA_NEXT(attr, attrlen);
}
return 0;
}
static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
int ifindex, u8 *buf, size_t len)
{
if (drv->ifindex == ifindex)
return 1;
if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
"interface");
wpa_driver_nl80211_finish_drv_init(drv);
return 1;
}
return 0;
}
static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
struct ifinfomsg *ifi,
u8 *buf, size_t len)
{
struct wpa_driver_nl80211_data *drv = ctx;
int attrlen, rta_len;
struct rtattr *attr;
u32 brid = 0;
if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
!have_ifidx(drv, ifi->ifi_index)) {
wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
"ifindex %d", ifi->ifi_index);
return;
}
wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
"(%s%s%s%s)",
drv->operstate, ifi->ifi_flags,
(ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
(ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
(ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
(ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
wpa_printf(MSG_DEBUG, "nl80211: Interface down");
drv->if_disabled = 1;
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
}
if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
wpa_printf(MSG_DEBUG, "nl80211: Interface up");
drv->if_disabled = 0;
wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
}
/*
* Some drivers send the association event before the operup event--in
* this case, lifting operstate in wpa_driver_nl80211_set_operstate()
* fails. This will hit us when wpa_supplicant does not need to do
* IEEE 802.1X authentication
*/
if (drv->operstate == 1 &&
(ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
!(ifi->ifi_flags & IFF_RUNNING))
netlink_send_oper_ifla(drv->netlink, drv->ifindex,
-1, IF_OPER_UP);
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_nl80211_event_link(
drv,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 0);
} else if (attr->rta_type == IFLA_MASTER)
brid = nla_get_u32((struct nlattr *) attr);
attr = RTA_NEXT(attr, attrlen);
}
#ifdef HOSTAPD
if (ifi->ifi_family == AF_BRIDGE && brid) {
/* device has been added to bridge */
char namebuf[IFNAMSIZ];
if_indextoname(brid, namebuf);
wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
brid, namebuf);
add_ifidx(drv, brid);
}
#endif /* HOSTAPD */
}
static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
struct ifinfomsg *ifi,
u8 *buf, size_t len)
{
struct wpa_driver_nl80211_data *drv = ctx;
int attrlen, rta_len;
struct rtattr *attr;
u32 brid = 0;
attrlen = len;
attr = (struct rtattr *) buf;
rta_len = RTA_ALIGN(sizeof(struct rtattr));
while (RTA_OK(attr, attrlen)) {
if (attr->rta_type == IFLA_IFNAME) {
wpa_driver_nl80211_event_link(
drv,
((char *) attr) + rta_len,
attr->rta_len - rta_len, 1);
} else if (attr->rta_type == IFLA_MASTER)
brid = nla_get_u32((struct nlattr *) attr);
attr = RTA_NEXT(attr, attrlen);
}
#ifdef HOSTAPD
if (ifi->ifi_family == AF_BRIDGE && brid) {
/* device has been removed from bridge */
char namebuf[IFNAMSIZ];
if_indextoname(brid, namebuf);
wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
"%s", brid, namebuf);
del_ifidx(drv, brid);
}
#endif /* HOSTAPD */
}
static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len < 24 + sizeof(mgmt->u.auth)) {
wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
"frame");
return;
}
os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
os_memset(&event, 0, sizeof(event));
os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
if (len > 24 + sizeof(mgmt->u.auth)) {
event.auth.ies = mgmt->u.auth.variable;
event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
}
wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
}
static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
u16 status;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
"frame");
return;
}
status = le_to_host16(mgmt->u.assoc_resp.status_code);
if (status != WLAN_STATUS_SUCCESS) {
os_memset(&event, 0, sizeof(event));
event.assoc_reject.bssid = mgmt->bssid;
if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
event.assoc_reject.resp_ies =
(u8 *) mgmt->u.assoc_resp.variable;
event.assoc_reject.resp_ies_len =
len - 24 - sizeof(mgmt->u.assoc_resp);
}
event.assoc_reject.status_code = status;
wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
return;
}
drv->associated = 1;
os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
os_memset(&event, 0, sizeof(event));
if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
event.assoc_info.resp_ies_len =
len - 24 - sizeof(mgmt->u.assoc_resp);
}
event.assoc_info.freq = drv->assoc_freq;
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}
static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
enum nl80211_commands cmd, struct nlattr *status,
struct nlattr *addr, struct nlattr *req_ie,
struct nlattr *resp_ie)
{
union wpa_event_data event;
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
/*
* Avoid reporting two association events that would confuse
* the core code.
*/
wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
"when using userspace SME", cmd);
return;
}
os_memset(&event, 0, sizeof(event));
if (cmd == NL80211_CMD_CONNECT &&
nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
if (addr)
event.assoc_reject.bssid = nla_data(addr);
if (resp_ie) {
event.assoc_reject.resp_ies = nla_data(resp_ie);
event.assoc_reject.resp_ies_len = nla_len(resp_ie);
}
event.assoc_reject.status_code = nla_get_u16(status);
wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
return;
}
drv->associated = 1;
if (addr)
os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
if (req_ie) {
event.assoc_info.req_ies = nla_data(req_ie);
event.assoc_info.req_ies_len = nla_len(req_ie);
}
if (resp_ie) {
event.assoc_info.resp_ies = nla_data(resp_ie);
event.assoc_info.resp_ies_len = nla_len(resp_ie);
}
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}
static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
enum nl80211_commands cmd, struct nlattr *addr)
{
union wpa_event_data event;
enum wpa_event_type ev;
if (nla_len(addr) != ETH_ALEN)
return;
wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
cmd, MAC2STR((u8 *) nla_data(addr)));
if (cmd == NL80211_CMD_AUTHENTICATE)
ev = EVENT_AUTH_TIMED_OUT;
else if (cmd == NL80211_CMD_ASSOCIATE)
ev = EVENT_ASSOC_TIMED_OUT;
else
return;
os_memset(&event, 0, sizeof(event));
os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
wpa_supplicant_event(drv->ctx, ev, &event);
}
static void mlme_event_mgmt(struct wpa_driver_nl80211_data *drv,
struct nlattr *freq, const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
u16 fc, stype;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len < 24) {
wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
return;
}
fc = le_to_host16(mgmt->frame_control);
stype = WLAN_FC_GET_STYPE(fc);
os_memset(&event, 0, sizeof(event));
if (freq) {
event.rx_action.freq = nla_get_u32(freq);
drv->last_mgmt_freq = event.rx_action.freq;
}
if (stype == WLAN_FC_STYPE_ACTION) {
event.rx_action.da = mgmt->da;
event.rx_action.sa = mgmt->sa;
event.rx_action.bssid = mgmt->bssid;
event.rx_action.category = mgmt->u.action.category;
event.rx_action.data = &mgmt->u.action.category + 1;
event.rx_action.len = frame + len - event.rx_action.data;
wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
} else {
event.rx_mgmt.frame = frame;
event.rx_mgmt.frame_len = len;
wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
}
}
static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
struct nlattr *cookie, const u8 *frame,
size_t len, struct nlattr *ack)
{
union wpa_event_data event;
const struct ieee80211_hdr *hdr;
u16 fc;
u64 cookie_val;
if (!cookie)
return;
cookie_val = nla_get_u64(cookie);
wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
"(ack=%d)",
(long long unsigned int) cookie_val,
cookie_val == drv->send_action_cookie ?
" (match)" : " (unknown)", ack != NULL);
if (cookie_val != drv->send_action_cookie)
return;
hdr = (const struct ieee80211_hdr *) frame;
fc = le_to_host16(hdr->frame_control);
os_memset(&event, 0, sizeof(event));
event.tx_status.type = WLAN_FC_GET_TYPE(fc);
event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
event.tx_status.dst = hdr->addr1;
event.tx_status.data = frame;
event.tx_status.data_len = len;
event.tx_status.ack = ack != NULL;
wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
}
static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
enum wpa_event_type type,
const u8 *frame, size_t len)
{
const struct ieee80211_mgmt *mgmt;
union wpa_event_data event;
const u8 *bssid = NULL;
u16 reason_code = 0;
mgmt = (const struct ieee80211_mgmt *) frame;
if (len >= 24) {
bssid = mgmt->bssid;
if (drv->associated != 0 &&
os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
/*
* We have presumably received this deauth as a
* response to a clear_state_mismatch() outgoing
* deauth. Don't let it take us offline!
*/
wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
"from Unknown BSSID " MACSTR " -- ignoring",
MAC2STR(bssid));
return;
}
}
drv->associated = 0;
os_memset(&event, 0, sizeof(event));
/* Note: Same offset for Reason Code in both frame subtypes */
if (len >= 24 + sizeof(mgmt->u.deauth))
reason_code = le_to_host16(mgmt->u.deauth.reason_code);
if (type == EVENT_DISASSOC) {
event.disassoc_info.addr = bssid;
event.disassoc_info.reason_code = reason_code;
if (frame + len > mgmt->u.disassoc.variable) {
event.disassoc_info.ie = mgmt->u.disassoc.variable;
event.disassoc_info.ie_len = frame + len -
mgmt->u.disassoc.variable;
}
} else {
event.deauth_info.addr = bssid;
event.deauth_info.reason_code = reason_code;
if (frame + len > mgmt->u.deauth.variable) {
event.deauth_info.ie = mgmt->u.deauth.variable;
event.deauth_info.ie_len = frame + len -
mgmt->u.deauth.variable;
}
}
wpa_supplicant_event(drv->ctx, type, &event);
}
static void mlme_event(struct wpa_driver_nl80211_data *drv,
enum nl80211_commands cmd, struct nlattr *frame,
struct nlattr *addr, struct nlattr *timed_out,
struct nlattr *freq, struct nlattr *ack,
struct nlattr *cookie)
{
if (timed_out && addr) {
mlme_timeout_event(drv, cmd, addr);
return;
}
if (frame == NULL) {
wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
"data", cmd);
return;
}
wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
nla_data(frame), nla_len(frame));
switch (cmd) {
case NL80211_CMD_AUTHENTICATE:
mlme_event_auth(drv, nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_ASSOCIATE:
mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_DEAUTHENTICATE:
mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_DISASSOCIATE:
mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_FRAME:
mlme_event_mgmt(drv, freq, nla_data(frame), nla_len(frame));
break;
case NL80211_CMD_FRAME_TX_STATUS:
mlme_event_action_tx_status(drv, cookie, nla_data(frame),
nla_len(frame), ack);
break;
default:
break;
}
}
static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
struct nlattr *tb[])
{
union wpa_event_data data;
wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
os_memset(&data, 0, sizeof(data));
if (tb[NL80211_ATTR_MAC]) {
wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
nla_data(tb[NL80211_ATTR_MAC]),
nla_len(tb[NL80211_ATTR_MAC]));
data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
}
if (tb[NL80211_ATTR_KEY_SEQ]) {
wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
nla_data(tb[NL80211_ATTR_KEY_SEQ]),
nla_len(tb[NL80211_ATTR_KEY_SEQ]));
}
if (tb[NL80211_ATTR_KEY_TYPE]) {
enum nl80211_key_type key_type =
nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
if (key_type == NL80211_KEYTYPE_PAIRWISE)
data.michael_mic_failure.unicast = 1;
} else
data.michael_mic_failure.unicast = 1;
if (tb[NL80211_ATTR_KEY_IDX]) {
u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
}
wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
}
static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
struct nlattr *tb[])
{
if (tb[NL80211_ATTR_MAC] == NULL) {
wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
"event");
return;
}
os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
drv->associated = 1;
wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
MAC2STR(drv->bssid));
wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
}
static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
int cancel_event, struct nlattr *tb[])
{
unsigned int freq, chan_type, duration;
union wpa_event_data data;
u64 cookie;
if (tb[NL80211_ATTR_WIPHY_FREQ])
freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
else
freq = 0;
if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
else
chan_type = 0;
if (tb[NL80211_ATTR_DURATION])
duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
else
duration = 0;
if (tb[NL80211_ATTR_COOKIE])
cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
else
cookie = 0;
wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
"freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
cancel_event, freq, chan_type, duration,
(long long unsigned int) cookie,
cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
if (cookie != drv->remain_on_chan_cookie)
return; /* not for us */
drv->pending_remain_on_chan = !cancel_event;
os_memset(&data, 0, sizeof(data));
data.remain_on_channel.freq = freq;
data.remain_on_channel.duration = duration;
wpa_supplicant_event(drv->ctx, cancel_event ?
EVENT_CANCEL_REMAIN_ON_CHANNEL :
EVENT_REMAIN_ON_CHANNEL, &data);
}
static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
struct nlattr *tb[])
{
union wpa_event_data event;
struct nlattr *nl;
int rem;
struct scan_info *info;
#define MAX_REPORT_FREQS 50
int freqs[MAX_REPORT_FREQS];
int num_freqs = 0;
os_memset(&event, 0, sizeof(event));
info = &event.scan_info;
info->aborted = aborted;
if (tb[NL80211_ATTR_SCAN_SSIDS]) {
nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
struct wpa_driver_scan_ssid *s =
&info->ssids[info->num_ssids];
s->ssid = nla_data(nl);
s->ssid_len = nla_len(nl);
info->num_ssids++;
if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
break;
}
}
if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
{
freqs[num_freqs] = nla_get_u32(nl);
num_freqs++;
if (num_freqs == MAX_REPORT_FREQS - 1)
break;
}
info->freqs = freqs;
info->num_freqs = num_freqs;
}
wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
}
static int get_link_signal(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
[NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
};
struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
[NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
[NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
[NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
[NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
};
struct signal_change *sig_change = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_STA_INFO] ||
nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
tb[NL80211_ATTR_STA_INFO], policy))
return NL_SKIP;
if (!sinfo[NL80211_STA_INFO_SIGNAL])
return NL_SKIP;
sig_change->current_signal =
(s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
sinfo[NL80211_STA_INFO_TX_BITRATE],
rate_policy)) {
sig_change->current_txrate = 0;
} else {
if (rinfo[NL80211_RATE_INFO_BITRATE]) {
sig_change->current_txrate =
nla_get_u16(rinfo[
NL80211_RATE_INFO_BITRATE]) * 100;
}
}
}
return NL_SKIP;
}
static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
struct signal_change *sig)
{
struct nl_msg *msg;
sig->current_signal = -9999;
sig->current_txrate = 0;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
return send_and_recv_msgs(drv, msg, get_link_signal, sig);
nla_put_failure:
return -ENOBUFS;
}
static int get_link_noise(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
};
struct signal_change *sig_change = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_SURVEY_INFO]) {
wpa_printf(MSG_DEBUG, "nl80211: survey data missing!");
return NL_SKIP;
}
if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
tb[NL80211_ATTR_SURVEY_INFO],
survey_policy)) {
wpa_printf(MSG_DEBUG, "nl80211: failed to parse nested "
"attributes!");
return NL_SKIP;
}
if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
return NL_SKIP;
if (nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
sig_change->frequency)
return NL_SKIP;
if (!sinfo[NL80211_SURVEY_INFO_NOISE])
return NL_SKIP;
sig_change->current_noise =
(s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
return NL_SKIP;
}
static int nl80211_get_link_noise(struct wpa_driver_nl80211_data *drv,
struct signal_change *sig_change)
{
struct nl_msg *msg;
sig_change->current_noise = 9999;
sig_change->frequency = drv->assoc_freq;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
NLM_F_DUMP, NL80211_CMD_GET_SURVEY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
nla_put_failure:
return -ENOBUFS;
}
static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
struct nlattr *tb[])
{
static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
};
struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
enum nl80211_cqm_rssi_threshold_event event;
union wpa_event_data ed;
struct signal_change sig;
int res;
if (tb[NL80211_ATTR_CQM] == NULL ||
nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
cqm_policy)) {
wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
return;
}
if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
return;
event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
os_memset(&ed, 0, sizeof(ed));
if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
"event: RSSI high");
ed.signal_change.above_threshold = 1;
} else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
"event: RSSI low");
ed.signal_change.above_threshold = 0;
} else
return;
res = nl80211_get_link_signal(drv, &sig);
if (res == 0) {
ed.signal_change.current_signal = sig.current_signal;
ed.signal_change.current_txrate = sig.current_txrate;
wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm txrate: %d",
sig.current_signal, sig.current_txrate);
}
res = nl80211_get_link_noise(drv, &sig);
if (res == 0) {
ed.signal_change.current_noise = sig.current_noise;
wpa_printf(MSG_DEBUG, "nl80211: Noise: %d dBm",
sig.current_noise);
}
wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
}
static int process_event(struct nl_msg *msg, void *arg)
{
struct wpa_driver_nl80211_data *drv = arg;
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *tb[NL80211_ATTR_MAX + 1];
union wpa_event_data data;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_IFINDEX]) {
int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
" for foreign interface (ifindex %d)",
gnlh->cmd, ifindex);
return NL_SKIP;
}
}
if (drv->ap_scan_as_station &&
(gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
wpa_driver_nl80211_set_mode(&drv->first_bss,
IEEE80211_MODE_AP);
drv->ap_scan_as_station = 0;
}
switch (gnlh->cmd) {
case NL80211_CMD_TRIGGER_SCAN:
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
break;
case NL80211_CMD_NEW_SCAN_RESULTS:
wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
drv->scan_complete_events = 1;
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
drv->ctx);
send_scan_event(drv, 0, tb);
break;
case NL80211_CMD_SCAN_ABORTED:
wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
/*
* Need to indicate that scan results are available in order
* not to make wpa_supplicant stop its scanning.
*/
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
drv->ctx);
send_scan_event(drv, 1, tb);
break;
case NL80211_CMD_AUTHENTICATE:
case NL80211_CMD_ASSOCIATE:
case NL80211_CMD_DEAUTHENTICATE:
case NL80211_CMD_DISASSOCIATE:
case NL80211_CMD_FRAME:
case NL80211_CMD_FRAME_TX_STATUS:
mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
tb[NL80211_ATTR_COOKIE]);
break;
case NL80211_CMD_CONNECT:
case NL80211_CMD_ROAM:
mlme_event_connect(drv, gnlh->cmd,
tb[NL80211_ATTR_STATUS_CODE],
tb[NL80211_ATTR_MAC],
tb[NL80211_ATTR_REQ_IE],
tb[NL80211_ATTR_RESP_IE]);
break;
case NL80211_CMD_DISCONNECT:
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
/*
* Avoid reporting two disassociation events that could
* confuse the core code.
*/
wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
"event when using userspace SME");
break;
}
drv->associated = 0;
os_memset(&data, 0, sizeof(data));
if (tb[NL80211_ATTR_REASON_CODE])
data.disassoc_info.reason_code =
nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
break;
case NL80211_CMD_MICHAEL_MIC_FAILURE:
mlme_event_michael_mic_failure(drv, tb);
break;
case NL80211_CMD_JOIN_IBSS:
mlme_event_join_ibss(drv, tb);
break;
case NL80211_CMD_REMAIN_ON_CHANNEL:
mlme_event_remain_on_channel(drv, 0, tb);
break;
case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
mlme_event_remain_on_channel(drv, 1, tb);
break;
case NL80211_CMD_NOTIFY_CQM:
nl80211_cqm_event(drv, tb);
break;
case NL80211_CMD_REG_CHANGE:
wpa_printf(MSG_DEBUG, "nl80211: Regulatory domain change");
wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
NULL);
break;
case NL80211_CMD_REG_BEACON_HINT:
wpa_printf(MSG_DEBUG, "nl80211: Regulatory beacon hint");
wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
NULL);
break;
default:
wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
"(cmd=%d)", gnlh->cmd);
break;
}
return NL_SKIP;
}
static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
void *handle)
{
struct nl_cb *cb;
struct wpa_driver_nl80211_data *drv = eloop_ctx;
wpa_printf(MSG_DEBUG, "nl80211: Event message available");
cb = nl_cb_clone(drv->nl_cb);
if (!cb)
return;
nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
nl_recvmsgs(handle, cb);
nl_cb_put(cb);
}
/**
* wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
* @priv: driver_nl80211 private data
* @alpha2_arg: country to which to switch to
* Returns: 0 on success, -1 on failure
*
* This asks nl80211 to set the regulatory domain for given
* country ISO / IEC alpha2.
*/
static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
char alpha2[3];
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
alpha2[0] = alpha2_arg[0];
alpha2[1] = alpha2_arg[1];
alpha2[2] = '\0';
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_REQ_SET_REG, 0);
NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
if (send_and_recv_msgs(drv, msg, NULL, NULL))
return -EINVAL;
return 0;
nla_put_failure:
return -EINVAL;
}
#ifndef HOSTAPD
struct wiphy_info_data {
int max_scan_ssids;
int ap_supported;
int auth_supported;
int connect_supported;
};
static int wiphy_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct wiphy_info_data *info = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
info->max_scan_ssids =
nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
struct nlattr *nl_mode;
int i;
nla_for_each_nested(nl_mode,
tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
info->ap_supported = 1;
break;
}
}
}
if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
struct nlattr *nl_cmd;
int i;
nla_for_each_nested(nl_cmd,
tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
u32 cmd = nla_get_u32(nl_cmd);
if (cmd == NL80211_CMD_AUTHENTICATE)
info->auth_supported = 1;
else if (cmd == NL80211_CMD_CONNECT)
info->connect_supported = 1;
}
}
return NL_SKIP;
}
static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
struct wiphy_info_data *info)
{
struct nl_msg *msg;
os_memset(info, 0, sizeof(*info));
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
return 0;
msg = NULL;
nla_put_failure:
nlmsg_free(msg);
return -1;
}
static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
{
struct wiphy_info_data info;
if (wpa_driver_nl80211_get_info(drv, &info))
return -1;
drv->has_capability = 1;
/* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
WPA_DRIVER_CAPA_ENC_WEP104 |
WPA_DRIVER_CAPA_ENC_TKIP |
WPA_DRIVER_CAPA_ENC_CCMP;
drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
WPA_DRIVER_AUTH_SHARED |
WPA_DRIVER_AUTH_LEAP;
drv->capa.max_scan_ssids = info.max_scan_ssids;
if (info.ap_supported)
drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
if (info.auth_supported)
drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
else if (!info.connect_supported) {
wpa_printf(MSG_INFO, "nl80211: Driver does not support "
"authentication/association or connect commands");
return -1;
}
drv->capa.flags |= WPA_DRIVER_FLAGS_SANE_ERROR_CODES;
drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
drv->capa.max_remain_on_chan = 5000;
return 0;
}
#endif /* HOSTAPD */
static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
{
int ret;
/* Initialize generic netlink and nl80211 */
drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
if (drv->nl_cb == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
"callbacks");
goto err1;
}
drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
if (drv->nl_handle == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
"callbacks");
goto err2;
}
drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
if (drv->nl_handle_event == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
"callbacks (event)");
goto err2b;
}
if (genl_connect(drv->nl_handle)) {
wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
"netlink");
goto err3;
}
if (genl_connect(drv->nl_handle_event)) {
wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
"netlink (event)");
goto err3;
}
#ifdef CONFIG_LIBNL20
if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache");
goto err3;
}
if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache (event)");
goto err3b;
}
#else /* CONFIG_LIBNL20 */
drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
if (drv->nl_cache == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache");
goto err3;
}
drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
if (drv->nl_cache_event == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache (event)");
goto err3b;
}
#endif /* CONFIG_LIBNL20 */
drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
if (drv->nl80211 == NULL) {
wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
"found");
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "scan");
if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_handle_event, ret);
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for scan events: %d (%s)",
ret, strerror(-ret));
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "mlme");
if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_handle_event, ret);
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
"membership for mlme events: %d (%s)",
ret, strerror(-ret));
goto err4;
}
ret = nl_get_multicast_id(drv, "nl80211", "regulatory");
if (ret >= 0)
ret = nl_socket_add_membership(drv->nl_handle_event, ret);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
"membership for regulatory events: %d (%s)",
ret, strerror(-ret));
/* Continue without regulatory events */
}
eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
wpa_driver_nl80211_event_receive, drv,
drv->nl_handle_event);
return 0;
err4:
nl_cache_free(drv->nl_cache_event);
err3b:
nl_cache_free(drv->nl_cache);
err3:
nl80211_handle_destroy(drv->nl_handle_event);
err2b:
nl80211_handle_destroy(drv->nl_handle);
err2:
nl_cb_put(drv->nl_cb);
err1:
return -1;
}
static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
{
wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
/*
* This may be for any interface; use ifdown event to disable
* interface.
*/
}
static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
{
struct wpa_driver_nl80211_data *drv = ctx;
wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
"after rfkill unblock");
return;
}
/* rtnetlink ifup handler will report interface as enabled */
}
/**
* wpa_driver_nl80211_init - Initialize nl80211 driver interface
* @ctx: context to be used when calling wpa_supplicant functions,
* e.g., wpa_supplicant_event()
* @ifname: interface name, e.g., wlan0
* @global_priv: private driver global data from global_init()
* Returns: Pointer to private data, %NULL on failure
*/
static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
void *global_priv)
{
struct wpa_driver_nl80211_data *drv;
struct netlink_config *cfg;
struct rfkill_config *rcfg;
struct i802_bss *bss;
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->global = global_priv;
if (drv->global)
dl_list_add(&drv->global->interfaces, &drv->list);
drv->ctx = ctx;
bss = &drv->first_bss;
bss->drv = drv;
os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
drv->monitor_ifidx = -1;
drv->monitor_sock = -1;
drv->ioctl_sock = -1;
if (wpa_driver_nl80211_init_nl(drv)) {
os_free(drv);
return NULL;
}
drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->ioctl_sock < 0) {
perror("socket(PF_INET,SOCK_DGRAM)");
goto failed;
}
cfg = os_zalloc(sizeof(*cfg));
if (cfg == NULL)
goto failed;
cfg->ctx = drv;
cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
drv->netlink = netlink_init(cfg);
if (drv->netlink == NULL) {
os_free(cfg);
goto failed;
}
rcfg = os_zalloc(sizeof(*rcfg));
if (rcfg == NULL)
goto failed;
rcfg->ctx = drv;
os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
drv->rfkill = rfkill_init(rcfg);
if (drv->rfkill == NULL) {
wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
os_free(rcfg);
}
if (wpa_driver_nl80211_finish_drv_init(drv))
goto failed;
return bss;
failed:
rfkill_deinit(drv->rfkill);
netlink_deinit(drv->netlink);
if (drv->ioctl_sock >= 0)
close(drv->ioctl_sock);
genl_family_put(drv->nl80211);
nl_cache_free(drv->nl_cache);
nl80211_handle_destroy(drv->nl_handle);
nl_cb_put(drv->nl_cb);
eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
os_free(drv);
return NULL;
}
static int nl80211_register_frame(struct wpa_driver_nl80211_data *drv,
struct nl_handle *nl_handle,
u16 type, const u8 *match, size_t match_len)
{
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_REGISTER_ACTION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, type);
NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
ret = send_and_recv(drv, nl_handle, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Register frame command "
"failed (type=%u): ret=%d (%s)",
type, ret, strerror(-ret));
wpa_hexdump(MSG_DEBUG, "nl80211: Register frame match",
match, match_len);
goto nla_put_failure;
}
ret = 0;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
const u8 *match, size_t match_len)
{
u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
return nl80211_register_frame(drv, drv->nl_handle_event,
type, match, match_len);
}
static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
{
#ifdef CONFIG_P2P
/* GAS Initial Request */
if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
return -1;
/* GAS Initial Response */
if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
return -1;
/* GAS Comeback Request */
if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
return -1;
/* GAS Comeback Response */
if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
return -1;
/* P2P Public Action */
if (nl80211_register_action_frame(drv,
(u8 *) "\x04\x09\x50\x6f\x9a\x09",
6) < 0)
return -1;
/* P2P Action */
if (nl80211_register_action_frame(drv,
(u8 *) "\x7f\x50\x6f\x9a\x09",
5) < 0)
return -1;
#endif /* CONFIG_P2P */
/* FT Action frames */
if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
return -1;
else
drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
return 0;
}
static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
{
wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
}
static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
{
struct i802_bss *bss = &drv->first_bss;
int send_rfkill_event = 0;
drv->ifindex = if_nametoindex(bss->ifname);
drv->first_bss.ifindex = drv->ifindex;
#ifndef HOSTAPD
if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
"use managed mode");
}
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
if (rfkill_is_blocked(drv->rfkill)) {
wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
"interface '%s' due to rfkill",
bss->ifname);
drv->if_disabled = 1;
send_rfkill_event = 1;
} else {
wpa_printf(MSG_ERROR, "nl80211: Could not set "
"interface '%s' UP", bss->ifname);
return -1;
}
}
if (wpa_driver_nl80211_capa(drv))
return -1;
netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1, IF_OPER_DORMANT);
#endif /* HOSTAPD */
linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, drv->addr);
if (nl80211_register_action_frames(drv) < 0) {
wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
"frame processing - ignore for now");
/*
* Older kernel versions did not support this, so ignore the
* error for now. Some functionality may not be available
* because of this.
*/
}
if (send_rfkill_event) {
eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
drv, drv->ctx);
}
return 0;
}
static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_BEACON, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
/**
* wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
* @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
*
* Shut down driver interface and processing of driver events. Free
* private data buffer if one was allocated in wpa_driver_nl80211_init().
*/
static void wpa_driver_nl80211_deinit(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (drv->nl_handle_preq)
wpa_driver_nl80211_probe_req_report(bss, 0);
if (drv->added_if_into_bridge) {
if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
< 0)
wpa_printf(MSG_INFO, "nl80211: Failed to remove "
"interface %s from bridge %s: %s",
bss->ifname, drv->brname, strerror(errno));
}
if (drv->added_bridge) {
if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
wpa_printf(MSG_INFO, "nl80211: Failed to remove "
"bridge %s: %s",
drv->brname, strerror(errno));
}
nl80211_remove_monitor_interface(drv);
if (drv->nlmode == NL80211_IFTYPE_AP)
wpa_driver_nl80211_del_beacon(drv);
#ifdef HOSTAPD
if (drv->last_freq_ht) {
/* Clear HT flags from the driver */
struct hostapd_freq_params freq;
os_memset(&freq, 0, sizeof(freq));
freq.freq = drv->last_freq;
i802_set_freq(priv, &freq);
}
if (drv->eapol_sock >= 0) {
eloop_unregister_read_sock(drv->eapol_sock);
close(drv->eapol_sock);
}
if (drv->if_indices != drv->default_if_indices)
os_free(drv->if_indices);
#endif /* HOSTAPD */
if (drv->disable_11b_rates)
nl80211_disable_11b_rates(drv, drv->ifindex, 0);
netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
netlink_deinit(drv->netlink);
rfkill_deinit(drv->rfkill);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
(void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
if (drv->ioctl_sock >= 0)
close(drv->ioctl_sock);
eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
genl_family_put(drv->nl80211);
nl_cache_free(drv->nl_cache);
nl_cache_free(drv->nl_cache_event);
nl80211_handle_destroy(drv->nl_handle);
nl80211_handle_destroy(drv->nl_handle_event);
nl_cb_put(drv->nl_cb);
os_free(drv->filter_ssids);
if (drv->global)
dl_list_del(&drv->list);
os_free(drv);
}
/**
* wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
* @eloop_ctx: Driver private data
* @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
*
* This function can be used as registered timeout when starting a scan to
* generate a scan completed event if the driver does not report this.
*/
static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_driver_nl80211_data *drv = eloop_ctx;
if (drv->ap_scan_as_station) {
wpa_driver_nl80211_set_mode(&drv->first_bss,
IEEE80211_MODE_AP);
drv->ap_scan_as_station = 0;
}
wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
}
/**
* wpa_driver_nl80211_scan - Request the driver to initiate scan
* @priv: Pointer to private driver data from wpa_driver_nl80211_init()
* @params: Scan parameters
* Returns: 0 on success, -1 on failure
*/
static int wpa_driver_nl80211_scan(void *priv,
struct wpa_driver_scan_params *params)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = 0, timeout;
struct nl_msg *msg, *ssids, *freqs;
size_t i;
msg = nlmsg_alloc();
ssids = nlmsg_alloc();
freqs = nlmsg_alloc();
if (!msg || !ssids || !freqs) {
nlmsg_free(msg);
nlmsg_free(ssids);
nlmsg_free(freqs);
return -1;
}
os_free(drv->filter_ssids);
drv->filter_ssids = params->filter_ssids;
params->filter_ssids = NULL;
drv->num_filter_ssids = params->num_filter_ssids;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_TRIGGER_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
for (i = 0; i < params->num_ssids; i++) {
wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
params->ssids[i].ssid,
params->ssids[i].ssid_len);
NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
params->ssids[i].ssid);
}
if (params->num_ssids)
nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
if (params->extra_ies) {
wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
params->extra_ies, params->extra_ies_len);
NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
params->extra_ies);
}
if (params->freqs) {
for (i = 0; params->freqs[i]; i++) {
wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
"MHz", params->freqs[i]);
NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
}
nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
"(%s)", ret, strerror(-ret));
#ifdef HOSTAPD
if (drv->nlmode == NL80211_IFTYPE_AP) {
/*
* mac80211 does not allow scan requests in AP mode, so
* try to do this in station mode.
*/
if (wpa_driver_nl80211_set_mode(bss,
IEEE80211_MODE_INFRA))
goto nla_put_failure;
if (wpa_driver_nl80211_scan(drv, params)) {
wpa_driver_nl80211_set_mode(bss,
IEEE80211_MODE_AP);
goto nla_put_failure;
}
/* Restore AP mode when processing scan results */
drv->ap_scan_as_station = 1;
ret = 0;
} else
goto nla_put_failure;
#else /* HOSTAPD */
goto nla_put_failure;
#endif /* HOSTAPD */
}
/* Not all drivers generate "scan completed" wireless event, so try to
* read results after a timeout. */
timeout = 10;
if (drv->scan_complete_events) {
/*
* The driver seems to deliver events to notify when scan is
* complete, so use longer timeout to avoid race conditions
* with scanning and following association request.
*/
timeout = 30;
}
wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
"seconds", ret, timeout);
eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
drv, drv->ctx);
nla_put_failure:
nlmsg_free(ssids);
nlmsg_free(msg);
nlmsg_free(freqs);
return ret;
}
static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
{
const u8 *end, *pos;
if (ies == NULL)
return NULL;
pos = ies;
end = ies + ies_len;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == ie)
return pos;
pos += 2 + pos[1];
}
return NULL;
}
static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
const u8 *ie, size_t ie_len)
{
const u8 *ssid;
size_t i;
if (drv->filter_ssids == NULL)
return 0;
ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
if (ssid == NULL)
return 1;
for (i = 0; i < drv->num_filter_ssids; i++) {
if (ssid[1] == drv->filter_ssids[i].ssid_len &&
os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
0)
return 0;
}
return 1;
}
struct nl80211_bss_info_arg {
struct wpa_driver_nl80211_data *drv;
struct wpa_scan_results *res;
};
static int bss_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *bss[NL80211_BSS_MAX + 1];
static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
[NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
[NL80211_BSS_TSF] = { .type = NLA_U64 },
[NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
[NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
[NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
[NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
[NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
[NL80211_BSS_STATUS] = { .type = NLA_U32 },
[NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
[NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
};
struct nl80211_bss_info_arg *_arg = arg;
struct wpa_scan_results *res = _arg->res;
struct wpa_scan_res **tmp;
struct wpa_scan_res *r;
const u8 *ie, *beacon_ie;
size_t ie_len, beacon_ie_len;
u8 *pos;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb[NL80211_ATTR_BSS])
return NL_SKIP;
if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
bss_policy))
return NL_SKIP;
if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
} else {
ie = NULL;
ie_len = 0;
}
if (bss[NL80211_BSS_BEACON_IES]) {
beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
} else {
beacon_ie = NULL;
beacon_ie_len = 0;
}
if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
ie ? ie_len : beacon_ie_len))
return NL_SKIP;
r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
if (r == NULL)
return NL_SKIP;
if (bss[NL80211_BSS_BSSID])
os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
ETH_ALEN);
if (bss[NL80211_BSS_FREQUENCY])
r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
if (bss[NL80211_BSS_BEACON_INTERVAL])
r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
if (bss[NL80211_BSS_CAPABILITY])
r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
r->flags |= WPA_SCAN_NOISE_INVALID;
if (bss[NL80211_BSS_SIGNAL_MBM]) {
r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
r->level /= 100; /* mBm to dBm */
r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
} else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
r->flags |= WPA_SCAN_LEVEL_INVALID;
} else
r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
if (bss[NL80211_BSS_TSF])
r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
if (bss[NL80211_BSS_SEEN_MS_AGO])
r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
r->ie_len = ie_len;
pos = (u8 *) (r + 1);
if (ie) {
os_memcpy(pos, ie, ie_len);
pos += ie_len;
}
r->beacon_ie_len = beacon_ie_len;
if (beacon_ie)
os_memcpy(pos, beacon_ie, beacon_ie_len);
if (bss[NL80211_BSS_STATUS]) {
enum nl80211_bss_status status;
status = nla_get_u32(bss[NL80211_BSS_STATUS]);
switch (status) {
case NL80211_BSS_STATUS_AUTHENTICATED:
r->flags |= WPA_SCAN_AUTHENTICATED;
break;
case NL80211_BSS_STATUS_ASSOCIATED:
r->flags |= WPA_SCAN_ASSOCIATED;
break;
default:
break;
}
}
tmp = os_realloc(res->res,
(res->num + 1) * sizeof(struct wpa_scan_res *));
if (tmp == NULL) {
os_free(r);
return NL_SKIP;
}
tmp[res->num++] = r;
res->res = tmp;
return NL_SKIP;
}
static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
const u8 *addr)
{
if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
"mismatch (" MACSTR ")", MAC2STR(addr));
wpa_driver_nl80211_mlme(drv, addr,
NL80211_CMD_DEAUTHENTICATE,
WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
}
}
static void wpa_driver_nl80211_check_bss_status(
struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
{
size_t i;
for (i = 0; i < res->num; i++) {
struct wpa_scan_res *r = res->res[i];
if (r->flags & WPA_SCAN_AUTHENTICATED) {
wpa_printf(MSG_DEBUG, "nl80211: Scan results "
"indicates BSS status with " MACSTR
" as authenticated",
MAC2STR(r->bssid));
if (drv->nlmode == NL80211_IFTYPE_STATION &&
os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
0) {
wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
" in local state (auth=" MACSTR
" assoc=" MACSTR ")",
MAC2STR(drv->auth_bssid),
MAC2STR(drv->bssid));
clear_state_mismatch(drv, r->bssid);
}
}
if (r->flags & WPA_SCAN_ASSOCIATED) {
wpa_printf(MSG_DEBUG, "nl80211: Scan results "
"indicate BSS status with " MACSTR
" as associated",
MAC2STR(r->bssid));
if (drv->nlmode == NL80211_IFTYPE_STATION &&
!drv->associated) {
wpa_printf(MSG_DEBUG, "nl80211: Local state "
"(not associated) does not match "
"with BSS state");
clear_state_mismatch(drv, r->bssid);
} else if (drv->nlmode == NL80211_IFTYPE_STATION &&
os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
0) {
wpa_printf(MSG_DEBUG, "nl80211: Local state "
"(associated with " MACSTR ") does "
"not match with BSS state",
MAC2STR(drv->bssid));
clear_state_mismatch(drv, r->bssid);
clear_state_mismatch(drv, drv->bssid);
}
}
}
}
static void wpa_scan_results_free(struct wpa_scan_results *res)
{
size_t i;
if (res == NULL)
return;
for (i = 0; i < res->num; i++)
os_free(res->res[i]);
os_free(res->res);
os_free(res);
}
static struct wpa_scan_results *
nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
struct wpa_scan_results *res;
int ret;
struct nl80211_bss_info_arg arg;
res = os_zalloc(sizeof(*res));
if (res == NULL)
return NULL;
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
NL80211_CMD_GET_SCAN, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
arg.drv = drv;
arg.res = res;
ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
msg = NULL;
if (ret == 0) {
wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
(unsigned long) res->num);
return res;
}
wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
"(%s)", ret, strerror(-ret));
nla_put_failure:
nlmsg_free(msg);
wpa_scan_results_free(res);
return NULL;
}
/**
* wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
* @priv: Pointer to private wext data from wpa_driver_nl80211_init()
* Returns: Scan results on success, -1 on failure
*/
static struct wpa_scan_results *
wpa_driver_nl80211_get_scan_results(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct wpa_scan_results *res;
res = nl80211_get_scan_results(drv);
if (res)
wpa_driver_nl80211_check_bss_status(drv, res);
return res;
}
static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
{
struct wpa_scan_results *res;
size_t i;
res = nl80211_get_scan_results(drv);
if (res == NULL) {
wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
return;
}
wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
for (i = 0; i < res->num; i++) {
struct wpa_scan_res *r = res->res[i];
wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
(int) i, (int) res->num, MAC2STR(r->bssid),
r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
}
wpa_scan_results_free(res);
}
static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
enum wpa_alg alg, const u8 *addr,
int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ifindex = if_nametoindex(ifname);
struct nl_msg *msg;
int ret;
wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
"set_tx=%d seq_len=%lu key_len=%lu",
__func__, ifindex, alg, addr, key_idx, set_tx,
(unsigned long) seq_len, (unsigned long) key_len);
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
if (alg == WPA_ALG_NONE) {
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_KEY, 0);
} else {
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_KEY, 0);
NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
switch (alg) {
case WPA_ALG_WEP:
if (key_len == 5)
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP40);
else
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP104);
break;
case WPA_ALG_TKIP:
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
WLAN_CIPHER_SUITE_TKIP);
break;
case WPA_ALG_CCMP:
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
WLAN_CIPHER_SUITE_CCMP);
break;
case WPA_ALG_IGTK:
NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
WLAN_CIPHER_SUITE_AES_CMAC);
break;
default:
wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
"algorithm %d", __func__, alg);
nlmsg_free(msg);
return -1;
}
}
if (seq && seq_len)
NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
{
wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
}
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
ret = 0;
if (ret)
wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
ret, strerror(-ret));
/*
* If we failed or don't need to set the default TX key (below),
* we're done here.
*/
if (ret || !set_tx || alg == WPA_ALG_NONE)
return ret;
#ifdef HOSTAPD
if (addr)
return ret;
#else /* HOSTAPD */
if (drv->nlmode == NL80211_IFTYPE_AP && addr)
return ret;
#endif /* HOSTAPD */
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_KEY, 0);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
if (alg == WPA_ALG_IGTK)
NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
else
NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret == -ENOENT)
ret = 0;
if (ret)
wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
"err=%d %s)", ret, strerror(-ret));
return ret;
nla_put_failure:
return -ENOBUFS;
}
static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
int key_idx, int defkey,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
if (!key_attr)
return -1;
if (defkey && alg == WPA_ALG_IGTK)
NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
else if (defkey)
NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
switch (alg) {
case WPA_ALG_WEP:
if (key_len == 5)
NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP40);
else
NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP104);
break;
case WPA_ALG_TKIP:
NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
break;
case WPA_ALG_CCMP:
NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
break;
case WPA_ALG_IGTK:
NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
WLAN_CIPHER_SUITE_AES_CMAC);
break;
default:
wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
"algorithm %d", __func__, alg);
return -1;
}
if (seq && seq_len)
NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
nla_nest_end(msg, key_attr);
return 0;
nla_put_failure:
return -1;
}
static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
struct nl_msg *msg)
{
int i, privacy = 0;
struct nlattr *nl_keys, *nl_key;
for (i = 0; i < 4; i++) {
if (!params->wep_key[i])
continue;
privacy = 1;
break;
}
if (params->wps == WPS_MODE_PRIVACY)
privacy = 1;
if (params->pairwise_suite &&
params->pairwise_suite != WPA_CIPHER_NONE)
privacy = 1;
if (!privacy)
return 0;
NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
if (!nl_keys)
goto nla_put_failure;
for (i = 0; i < 4; i++) {
if (!params->wep_key[i])
continue;
nl_key = nla_nest_start(msg, i);
if (!nl_key)
goto nla_put_failure;
NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
params->wep_key[i]);
if (params->wep_key_len[i] == 5)
NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP40);
else
NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
WLAN_CIPHER_SUITE_WEP104);
NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
if (i == params->wep_tx_keyidx)
NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
nla_nest_end(msg, nl_key);
}
nla_nest_end(msg, nl_keys);
return 0;
nla_put_failure:
return -ENOBUFS;
}
static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
const u8 *addr, int cmd, u16 reason_code,
int local_state_change)
{
int ret = -1;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
if (local_state_change)
NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
const u8 *addr, int reason_code)
{
wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
__func__, MAC2STR(addr), reason_code);
drv->associated = 0;
return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
reason_code, 0);
}
static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
int reason_code)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
__func__, MAC2STR(addr), reason_code);
drv->associated = 0;
return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
reason_code, 0);
}
static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
int reason_code)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
wpa_printf(MSG_DEBUG, "%s", __func__);
drv->associated = 0;
return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
reason_code, 0);
}
static int wpa_driver_nl80211_authenticate(
void *priv, struct wpa_driver_auth_params *params)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1, i;
struct nl_msg *msg;
enum nl80211_auth_type type;
int count = 0;
drv->associated = 0;
os_memset(drv->auth_bssid, 0, ETH_ALEN);
/* FIX: IBSS mode */
if (drv->nlmode != NL80211_IFTYPE_STATION)
wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
return -1;
retry:
msg = nlmsg_alloc();
if (!msg)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
drv->ifindex);
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_AUTHENTICATE, 0);
for (i = 0; i < 4; i++) {
if (!params->wep_key[i])
continue;
wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
NULL, i,
i == params->wep_tx_keyidx, NULL, 0,
params->wep_key[i],
params->wep_key_len[i]);
if (params->wep_tx_keyidx != i)
continue;
if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
params->wep_key[i], params->wep_key_len[i])) {
nlmsg_free(msg);
return -1;
}
}
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->bssid) {
wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
MAC2STR(params->bssid));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
}
if (params->freq) {
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
}
if (params->ssid) {
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
}
wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
if (params->ie)
NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
if (params->auth_alg & WPA_AUTH_ALG_OPEN)
type = NL80211_AUTHTYPE_OPEN_SYSTEM;
else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
type = NL80211_AUTHTYPE_SHARED_KEY;
else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
type = NL80211_AUTHTYPE_NETWORK_EAP;
else if (params->auth_alg & WPA_AUTH_ALG_FT)
type = NL80211_AUTHTYPE_FT;
else
goto nla_put_failure;
wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
if (params->local_state_change) {
wpa_printf(MSG_DEBUG, " * Local state change only");
NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
count++;
if (ret == -EALREADY && count == 1 && params->bssid &&
!params->local_state_change) {
/*
* mac80211 does not currently accept new
* authentication if we are already authenticated. As a
* workaround, force deauthentication and try again.
*/
wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
"after forced deauthentication");
wpa_driver_nl80211_deauthenticate(
bss, params->bssid,
WLAN_REASON_PREV_AUTH_NOT_VALID);
nlmsg_free(msg);
goto retry;
}
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
"successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
struct phy_info_arg {
u16 *num_modes;
struct hostapd_hw_modes *modes;
};
static int phy_info_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct phy_info_arg *phy_info = arg;
struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
[NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
[NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
};
struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
[NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
};
struct nlattr *nl_band;
struct nlattr *nl_freq;
struct nlattr *nl_rate;
int rem_band, rem_freq, rem_rate;
struct hostapd_hw_modes *mode;
int idx, mode_is_set;
nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
return NL_SKIP;
nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
if (!mode)
return NL_SKIP;
phy_info->modes = mode;
mode_is_set = 0;
mode = &phy_info->modes[*(phy_info->num_modes)];
memset(mode, 0, sizeof(*mode));
*(phy_info->num_modes) += 1;
nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
nla_len(nl_band), NULL);
if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
mode->ht_capab = nla_get_u16(
tb_band[NL80211_BAND_ATTR_HT_CAPA]);
}
if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
mode->a_mpdu_params |= nla_get_u8(
tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
0x03;
}
if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
mode->a_mpdu_params |= nla_get_u8(
tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2;
}
if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
u8 *mcs;
mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
os_memcpy(mode->mcs_set, mcs, 16);
}
nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
nla_len(nl_freq), freq_policy);
if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
continue;
mode->num_channels++;
}
mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
if (!mode->channels)
return NL_SKIP;
idx = 0;
nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
nla_len(nl_freq), freq_policy);
if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
continue;
mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
mode->channels[idx].flag = 0;
if (!mode_is_set) {
/* crude heuristic */
if (mode->channels[idx].freq < 4000)
mode->mode = HOSTAPD_MODE_IEEE80211B;
else
mode->mode = HOSTAPD_MODE_IEEE80211A;
mode_is_set = 1;
}
/* crude heuristic */
if (mode->channels[idx].freq < 4000)
if (mode->channels[idx].freq == 2484)
mode->channels[idx].chan = 14;
else
mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
else
mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
mode->channels[idx].flag |=
HOSTAPD_CHAN_DISABLED;
if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
mode->channels[idx].flag |=
HOSTAPD_CHAN_PASSIVE_SCAN;
if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
mode->channels[idx].flag |=
HOSTAPD_CHAN_NO_IBSS;
if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
mode->channels[idx].flag |=
HOSTAPD_CHAN_RADAR;
if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
!tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
mode->channels[idx].max_tx_power =
nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
idx++;
}
nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
nla_len(nl_rate), rate_policy);
if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
continue;
mode->num_rates++;
}
mode->rates = os_zalloc(mode->num_rates * sizeof(int));
if (!mode->rates)
return NL_SKIP;
idx = 0;
nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
nla_len(nl_rate), rate_policy);
if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
continue;
mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
/* crude heuristic */
if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
mode->rates[idx] > 200)
mode->mode = HOSTAPD_MODE_IEEE80211G;
idx++;
}
}
return NL_SKIP;
}
static struct hostapd_hw_modes *
wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
{
u16 m;
struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
int i, mode11g_idx = -1;
/* If only 802.11g mode is included, use it to construct matching
* 802.11b mode data. */
for (m = 0; m < *num_modes; m++) {
if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
return modes; /* 802.11b already included */
if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
mode11g_idx = m;
}
if (mode11g_idx < 0)
return modes; /* 2.4 GHz band not supported at all */
nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
if (nmodes == NULL)
return modes; /* Could not add 802.11b mode */
mode = &nmodes[*num_modes];
os_memset(mode, 0, sizeof(*mode));
(*num_modes)++;
modes = nmodes;
mode->mode = HOSTAPD_MODE_IEEE80211B;
mode11g = &modes[mode11g_idx];
mode->num_channels = mode11g->num_channels;
mode->channels = os_malloc(mode11g->num_channels *
sizeof(struct hostapd_channel_data));
if (mode->channels == NULL) {
(*num_modes)--;
return modes; /* Could not add 802.11b mode */
}
os_memcpy(mode->channels, mode11g->channels,
mode11g->num_channels * sizeof(struct hostapd_channel_data));
mode->num_rates = 0;
mode->rates = os_malloc(4 * sizeof(int));
if (mode->rates == NULL) {
os_free(mode->channels);
(*num_modes)--;
return modes; /* Could not add 802.11b mode */
}
for (i = 0; i < mode11g->num_rates; i++) {
if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
continue;
mode->rates[mode->num_rates] = mode11g->rates[i];
mode->num_rates++;
if (mode->num_rates == 4)
break;
}
if (mode->num_rates == 0) {
os_free(mode->channels);
os_free(mode->rates);
(*num_modes)--;
return modes; /* No 802.11b rates */
}
wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
"information");
return modes;
}
static void nl80211_set_ht40_mode(struct hostapd_hw_modes *mode, int start,
int end)
{
int c;
for (c = 0; c < mode->num_channels; c++) {
struct hostapd_channel_data *chan = &mode->channels[c];
if (chan->freq - 10 >= start && chan->freq + 10 <= end)
chan->flag |= HOSTAPD_CHAN_HT40;
}
}
static void nl80211_set_ht40_mode_sec(struct hostapd_hw_modes *mode, int start,
int end)
{
int c;
for (c = 0; c < mode->num_channels; c++) {
struct hostapd_channel_data *chan = &mode->channels[c];
if (!(chan->flag & HOSTAPD_CHAN_HT40))
continue;
if (chan->freq - 30 >= start && chan->freq - 10 <= end)
chan->flag |= HOSTAPD_CHAN_HT40MINUS;
if (chan->freq + 10 >= start && chan->freq + 30 <= end)
chan->flag |= HOSTAPD_CHAN_HT40PLUS;
}
}
static void nl80211_reg_rule_ht40(struct nlattr *tb[],
struct phy_info_arg *results)
{
u32 start, end, max_bw;
u16 m;
if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
return;
start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
wpa_printf(MSG_DEBUG, "nl80211: %u-%u @ %u MHz",
start, end, max_bw);
if (max_bw < 40)
return;
for (m = 0; m < *results->num_modes; m++) {
if (!(results->modes[m].ht_capab &
HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
continue;
nl80211_set_ht40_mode(&results->modes[m], start, end);
}
}
static void nl80211_reg_rule_sec(struct nlattr *tb[],
struct phy_info_arg *results)
{
u32 start, end, max_bw;
u16 m;
if (tb[NL80211_ATTR_FREQ_RANGE_START] == NULL ||
tb[NL80211_ATTR_FREQ_RANGE_END] == NULL ||
tb[NL80211_ATTR_FREQ_RANGE_MAX_BW] == NULL)
return;
start = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]) / 1000;
end = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]) / 1000;
max_bw = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) / 1000;
if (max_bw < 20)
return;
for (m = 0; m < *results->num_modes; m++) {
if (!(results->modes[m].ht_capab &
HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
continue;
nl80211_set_ht40_mode_sec(&results->modes[m], start, end);
}
}
static int nl80211_get_reg(struct nl_msg *msg, void *arg)
{
struct phy_info_arg *results = arg;
struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct nlattr *nl_rule;
struct nlattr *tb_rule[NL80211_FREQUENCY_ATTR_MAX + 1];
int rem_rule;
static struct nla_policy reg_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
[NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
[NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
[NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
};
nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (!tb_msg[NL80211_ATTR_REG_ALPHA2] ||
!tb_msg[NL80211_ATTR_REG_RULES]) {
wpa_printf(MSG_DEBUG, "nl80211: No regulatory information "
"available");
return NL_SKIP;
}
wpa_printf(MSG_DEBUG, "nl80211: Regulatory information - country=%s",
(char *) nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]));
nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
{
nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
nla_data(nl_rule), nla_len(nl_rule), reg_policy);
nl80211_reg_rule_ht40(tb_rule, results);
}
nla_for_each_nested(nl_rule, tb_msg[NL80211_ATTR_REG_RULES], rem_rule)
{
nla_parse(tb_rule, NL80211_FREQUENCY_ATTR_MAX,
nla_data(nl_rule), nla_len(nl_rule), reg_policy);
nl80211_reg_rule_sec(tb_rule, results);
}
return NL_SKIP;
}
static int nl80211_set_ht40_flags(struct wpa_driver_nl80211_data *drv,
struct phy_info_arg *results)
{
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_REG, 0);
return send_and_recv_msgs(drv, msg, nl80211_get_reg, results);
}
static struct hostapd_hw_modes *
wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
struct phy_info_arg result = {
.num_modes = num_modes,
.modes = NULL,
};
*num_modes = 0;
*flags = 0;
msg = nlmsg_alloc();
if (!msg)
return NULL;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0) {
nl80211_set_ht40_flags(drv, &result);
return wpa_driver_nl80211_add_11b(result.modes, num_modes);
}
nla_put_failure:
return NULL;
}
static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
const void *data, size_t len,
int encrypt)
{
__u8 rtap_hdr[] = {
0x00, 0x00, /* radiotap version */
0x0e, 0x00, /* radiotap length */
0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
0x00, /* padding */
0x00, 0x00, /* RX and TX flags to indicate that */
0x00, 0x00, /* this is the injected frame directly */
};
struct iovec iov[2] = {
{
.iov_base = &rtap_hdr,
.iov_len = sizeof(rtap_hdr),
},
{
.iov_base = (void *) data,
.iov_len = len,
}
};
struct msghdr msg = {
.msg_name = NULL,
.msg_namelen = 0,
.msg_iov = iov,
.msg_iovlen = 2,
.msg_control = NULL,
.msg_controllen = 0,
.msg_flags = 0,
};
int res;
if (encrypt)
rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
res = sendmsg(drv->monitor_sock, &msg, 0);
if (res < 0) {
wpa_printf(MSG_INFO, "nl80211: sendmsg: %s", strerror(errno));
return -1;
}
return 0;
}
static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
size_t data_len)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct ieee80211_mgmt *mgmt;
int encrypt = 1;
u16 fc;
mgmt = (struct ieee80211_mgmt *) data;
fc = le_to_host16(mgmt->frame_control);
if (drv->nlmode == NL80211_IFTYPE_STATION &&
WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
/*
* The use of last_mgmt_freq is a bit of a hack,
* but it works due to the single-threaded nature
* of wpa_supplicant.
*/
return nl80211_send_frame_cmd(drv, drv->last_mgmt_freq,
data, data_len, NULL);
}
if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
/*
* Only one of the authentication frame types is encrypted.
* In order for static WEP encryption to work properly (i.e.,
* to not encrypt the frame), we need to tell mac80211 about
* the frames that must not be encrypted.
*/
u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
encrypt = 0;
}
return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
}
static int wpa_driver_nl80211_set_beacon(void *priv,
const u8 *head, size_t head_len,
const u8 *tail, size_t tail_len,
int dtim_period, int beacon_int)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
u8 cmd = NL80211_CMD_NEW_BEACON;
int ret;
int beacon_set;
int ifindex = if_nametoindex(bss->ifname);
beacon_set = bss->beacon_set;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
beacon_set);
if (beacon_set)
cmd = NL80211_CMD_SET_BEACON;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, cmd, 0);
NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
ret, strerror(-ret));
} else {
bss->beacon_set = 1;
}
return ret;
nla_put_failure:
return -ENOBUFS;
}
static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
int freq, int ht_enabled,
int sec_channel_offset)
{
struct nl_msg *msg;
int ret;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_SET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
if (ht_enabled) {
switch (sec_channel_offset) {
case -1:
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
NL80211_CHAN_HT40MINUS);
break;
case 1:
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
NL80211_CHAN_HT40PLUS);
break;
default:
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
NL80211_CHAN_HT20);
break;
}
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret == 0)
return 0;
wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
"%d (%s)", freq, ret, strerror(-ret));
nla_put_failure:
return -1;
}
static int wpa_driver_nl80211_sta_add(void *priv,
struct hostapd_sta_add_params *params)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret = -ENOBUFS;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
params->supp_rates);
NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
params->listen_interval);
if (params->ht_capabilities) {
NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
sizeof(*params->ht_capabilities),
params->ht_capabilities);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret)
wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
"result: %d (%s)", ret, strerror(-ret));
if (ret == -EEXIST)
ret = 0;
nla_put_failure:
return ret;
}
static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(bss->ifname));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret == -ENOENT)
return 0;
return ret;
nla_put_failure:
return -ENOBUFS;
}
static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
int ifidx)
{
struct nl_msg *msg;
wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
#ifdef HOSTAPD
/* stop listening for EAPOL on this interface */
del_ifidx(drv, ifidx);
#endif /* HOSTAPD */
msg = nlmsg_alloc();
if (!msg)
goto nla_put_failure;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
return;
nla_put_failure:
wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
}
static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
const char *ifname,
enum nl80211_iftype iftype,
const u8 *addr, int wds)
{
struct nl_msg *msg, *flags = NULL;
int ifidx;
int ret = -ENOBUFS;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_NEW_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
if (iftype == NL80211_IFTYPE_MONITOR) {
int err;
flags = nlmsg_alloc();
if (!flags)
goto nla_put_failure;
NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
nlmsg_free(flags);
if (err)
goto nla_put_failure;
} else if (wds) {
NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret) {
nla_put_failure:
wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
ifname, ret, strerror(-ret));
return ret;
}
ifidx = if_nametoindex(ifname);
wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
ifname, ifidx);
if (ifidx <= 0)
return -1;
#ifdef HOSTAPD
/* start listening for EAPOL on this interface */
add_ifidx(drv, ifidx);
#endif /* HOSTAPD */
if (addr && iftype != NL80211_IFTYPE_MONITOR &&
linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
return ifidx;
}
static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
const char *ifname, enum nl80211_iftype iftype,
const u8 *addr, int wds)
{
int ret;
ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
/* if error occured and interface exists already */
if (ret == -ENFILE && if_nametoindex(ifname)) {
wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
/* Try to remove the interface that was already there. */
nl80211_remove_iface(drv, if_nametoindex(ifname));
/* Try to create the interface again */
ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
wds);
}
if (ret >= 0 && drv->disable_11b_rates)
nl80211_disable_11b_rates(drv, ret, 1);
return ret;
}
static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
{
struct ieee80211_hdr *hdr;
u16 fc;
union wpa_event_data event;
hdr = (struct ieee80211_hdr *) buf;
fc = le_to_host16(hdr->frame_control);
os_memset(&event, 0, sizeof(event));
event.tx_status.type = WLAN_FC_GET_TYPE(fc);
event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
event.tx_status.dst = hdr->addr1;
event.tx_status.data = buf;
event.tx_status.data_len = len;
event.tx_status.ack = ok;
wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
}
static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
u8 *buf, size_t len)
{
union wpa_event_data event;
os_memset(&event, 0, sizeof(event));
event.rx_from_unknown.frame = buf;
event.rx_from_unknown.len = len;
wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
}
static void handle_frame(struct wpa_driver_nl80211_data *drv,
u8 *buf, size_t len, int datarate, int ssi_signal)
{
struct ieee80211_hdr *hdr;
u16 fc;
union wpa_event_data event;
hdr = (struct ieee80211_hdr *) buf;
fc = le_to_host16(hdr->frame_control);
switch (WLAN_FC_GET_TYPE(fc)) {
case WLAN_FC_TYPE_MGMT:
os_memset(&event, 0, sizeof(event));
event.rx_mgmt.frame = buf;
event.rx_mgmt.frame_len = len;
event.rx_mgmt.datarate = datarate;
event.rx_mgmt.ssi_signal = ssi_signal;
wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
break;
case WLAN_FC_TYPE_CTRL:
/* can only get here with PS-Poll frames */
wpa_printf(MSG_DEBUG, "CTRL");
from_unknown_sta(drv, buf, len);
break;
case WLAN_FC_TYPE_DATA:
from_unknown_sta(drv, buf, len);
break;
}
}
static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
{
struct wpa_driver_nl80211_data *drv = eloop_ctx;
int len;
unsigned char buf[3000];
struct ieee80211_radiotap_iterator iter;
int ret;
int datarate = 0, ssi_signal = 0;
int injected = 0, failed = 0, rxflags = 0;
len = recv(sock, buf, sizeof(buf), 0);
if (len < 0) {
perror("recv");
return;
}
if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
printf("received invalid radiotap frame\n");
return;
}
while (1) {
ret = ieee80211_radiotap_iterator_next(&iter);
if (ret == -ENOENT)
break;
if (ret) {
printf("received invalid radiotap frame (%d)\n", ret);
return;
}
switch (iter.this_arg_index) {
case IEEE80211_RADIOTAP_FLAGS:
if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
len -= 4;
break;
case IEEE80211_RADIOTAP_RX_FLAGS:
rxflags = 1;
break;
case IEEE80211_RADIOTAP_TX_FLAGS:
injected = 1;
failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
IEEE80211_RADIOTAP_F_TX_FAIL;
break;
case IEEE80211_RADIOTAP_DATA_RETRIES:
break;
case IEEE80211_RADIOTAP_CHANNEL:
/* TODO: convert from freq/flags to channel number */
break;
case IEEE80211_RADIOTAP_RATE:
datarate = *iter.this_arg * 5;
break;
case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
ssi_signal = *iter.this_arg;
break;
}
}
if (rxflags && injected)
return;
if (!injected)
handle_frame(drv, buf + iter.max_length,
len - iter.max_length, datarate, ssi_signal);
else
handle_tx_callback(drv->ctx, buf + iter.max_length,
len - iter.max_length, !failed);
}
/*
* we post-process the filter code later and rewrite
* this to the offset to the last instruction
*/
#define PASS 0xFF
#define FAIL 0xFE
static struct sock_filter msock_filter_insns[] = {
/*
* do a little-endian load of the radiotap length field
*/
/* load lower byte into A */
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
/* put it into X (== index register) */
BPF_STMT(BPF_MISC| BPF_TAX, 0),
/* load upper byte into A */
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
/* left-shift it by 8 */
BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
/* or with X */
BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
/* put result into X */
BPF_STMT(BPF_MISC| BPF_TAX, 0),
/*
* Allow management frames through, this also gives us those
* management frames that we sent ourselves with status
*/
/* load the lower byte of the IEEE 802.11 frame control field */
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
/* mask off frame type and version */
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
/* accept frame if it's both 0, fall through otherwise */
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
/*
* TODO: add a bit to radiotap RX flags that indicates
* that the sending station is not associated, then
* add a filter here that filters on our DA and that flag
* to allow us to deauth frames to that bad station.
*
* For now allow all To DS data frames through.
*/
/* load the IEEE 802.11 frame control field */
BPF_STMT(BPF_LD | BPF_H | BPF_IND, 0),
/* mask off frame type, version and DS status */
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0F03),
/* accept frame if version 0, type 2 and To DS, fall through otherwise
*/
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0801, PASS, 0),
#if 0
/*
* drop non-data frames
*/
/* load the lower byte of the frame control field */
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
/* mask off QoS bit */
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
/* drop non-data frames */
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
#endif
/* load the upper byte of the frame control field */
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
/* mask off toDS/fromDS */
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
/* accept WDS frames */
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, PASS, 0),
/*
* add header length to index
*/
/* load the lower byte of the frame control field */
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
/* mask off QoS bit */
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
/* right shift it by 6 to give 0 or 2 */
BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
/* add data frame header length */
BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
/* add index, was start of 802.11 header */
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
/* move to index, now start of LL header */
BPF_STMT(BPF_MISC | BPF_TAX, 0),
/*
* Accept empty data frames, we use those for
* polling activity.
*/
BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
/*
* Accept EAPOL frames
*/
BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
/* keep these last two statements or change the code below */
/* return 0 == "DROP" */
BPF_STMT(BPF_RET | BPF_K, 0),
/* return ~0 == "keep all" */
BPF_STMT(BPF_RET | BPF_K, ~0),
};
static struct sock_fprog msock_filter = {
.len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
.filter = msock_filter_insns,
};
static int add_monitor_filter(int s)
{
int idx;
/* rewrite all PASS/FAIL jump offsets */
for (idx = 0; idx < msock_filter.len; idx++) {
struct sock_filter *insn = &msock_filter_insns[idx];
if (BPF_CLASS(insn->code) == BPF_JMP) {
if (insn->code == (BPF_JMP|BPF_JA)) {
if (insn->k == PASS)
insn->k = msock_filter.len - idx - 2;
else if (insn->k == FAIL)
insn->k = msock_filter.len - idx - 3;
}
if (insn->jt == PASS)
insn->jt = msock_filter.len - idx - 2;
else if (insn->jt == FAIL)
insn->jt = msock_filter.len - idx - 3;
if (insn->jf == PASS)
insn->jf = msock_filter.len - idx - 2;
else if (insn->jf == FAIL)
insn->jf = msock_filter.len - idx - 3;
}
}
if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
&msock_filter, sizeof(msock_filter))) {
perror("SO_ATTACH_FILTER");
return -1;
}
return 0;
}
static void nl80211_remove_monitor_interface(
struct wpa_driver_nl80211_data *drv)
{
if (drv->monitor_ifidx >= 0) {
nl80211_remove_iface(drv, drv->monitor_ifidx);
drv->monitor_ifidx = -1;
}
if (drv->monitor_sock >= 0) {
eloop_unregister_read_sock(drv->monitor_sock);
close(drv->monitor_sock);
drv->monitor_sock = -1;
}
}
static int
nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
{
char buf[IFNAMSIZ];
struct sockaddr_ll ll;
int optval;
socklen_t optlen;
snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
buf[IFNAMSIZ - 1] = '\0';
drv->monitor_ifidx =
nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
0);
if (drv->monitor_ifidx < 0)
return -1;
if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
goto error;
memset(&ll, 0, sizeof(ll));
ll.sll_family = AF_PACKET;
ll.sll_ifindex = drv->monitor_ifidx;
drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (drv->monitor_sock < 0) {
perror("socket[PF_PACKET,SOCK_RAW]");
goto error;
}
if (add_monitor_filter(drv->monitor_sock)) {
wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
"interface; do filtering in user space");
/* This works, but will cost in performance. */
}
if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
perror("monitor socket bind");
goto error;
}
optlen = sizeof(optval);
optval = 20;
if (setsockopt
(drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
perror("Failed to set socket priority");
goto error;
}
if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
drv, NULL)) {
printf("Could not register monitor read socket\n");
goto error;
}
return 0;
error:
nl80211_remove_monitor_interface(drv);
return -1;
}
static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
static int wpa_driver_nl80211_hapd_send_eapol(
void *priv, const u8 *addr, const u8 *data,
size_t data_len, int encrypt, const u8 *own_addr)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct ieee80211_hdr *hdr;
size_t len;
u8 *pos;
int res;
#if 0 /* FIX */
int qos = sta->flags & WPA_STA_WMM;
#else
int qos = 0;
#endif
len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
data_len;
hdr = os_zalloc(len);
if (hdr == NULL) {
printf("malloc() failed for i802_send_data(len=%lu)\n",
(unsigned long) len);
return -1;
}
hdr->frame_control =
IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
if (encrypt)
hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
#if 0 /* To be enabled if qos determination is added above */
if (qos) {
hdr->frame_control |=
host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
}
#endif
memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
pos = (u8 *) (hdr + 1);
#if 0 /* To be enabled if qos determination is added above */
if (qos) {
/* add an empty QoS header if needed */
pos[0] = 0;
pos[1] = 0;
pos += 2;
}
#endif
memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
pos += sizeof(rfc1042_header);
WPA_PUT_BE16(pos, ETH_P_PAE);
pos += 2;
memcpy(pos, data, data_len);
res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
if (res < 0) {
wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
"failed: %d (%s)",
(unsigned long) len, errno, strerror(errno));
}
os_free(hdr);
return res;
}
static u32 sta_flags_nl80211(int flags)
{
u32 f = 0;
if (flags & WPA_STA_AUTHORIZED)
f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
if (flags & WPA_STA_WMM)
f |= BIT(NL80211_STA_FLAG_WME);
if (flags & WPA_STA_SHORT_PREAMBLE)
f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
if (flags & WPA_STA_MFP)
f |= BIT(NL80211_STA_FLAG_MFP);
return f;
}
static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
int total_flags,
int flags_or, int flags_and)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg, *flags = NULL;
struct nl80211_sta_flag_update upd;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
flags = nlmsg_alloc();
if (!flags) {
nlmsg_free(msg);
return -ENOMEM;
}
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(bss->ifname));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
/*
* Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
* can be removed eventually.
*/
if (total_flags & WPA_STA_AUTHORIZED)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
if (total_flags & WPA_STA_WMM)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
if (total_flags & WPA_STA_SHORT_PREAMBLE)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
if (total_flags & WPA_STA_MFP)
NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
goto nla_put_failure;
os_memset(&upd, 0, sizeof(upd));
upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
upd.set = sta_flags_nl80211(flags_or);
NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
nlmsg_free(flags);
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
nlmsg_free(flags);
return -ENOBUFS;
}
static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
struct wpa_driver_associate_params *params)
{
if (params->p2p)
wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
"group (GO)");
if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
nl80211_remove_monitor_interface(drv);
return -1;
}
/* TODO: setup monitor interface (and add code somewhere to remove this
* when AP mode is stopped; associate with mode != 2 or drv_deinit) */
return 0;
}
static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
{
struct nl_msg *msg;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_LEAVE_IBSS, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
struct wpa_driver_associate_params *params)
{
struct nl_msg *msg;
int ret = -1;
int count = 0;
wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
"IBSS mode");
return -1;
}
retry:
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_JOIN_IBSS, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
goto nla_put_failure;
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
os_memcpy(drv->ssid, params->ssid, params->ssid_len);
drv->ssid_len = params->ssid_len;
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
ret = nl80211_set_conn_keys(params, msg);
if (ret)
goto nla_put_failure;
if (params->wpa_ie) {
wpa_hexdump(MSG_DEBUG,
" * Extra IEs for Beacon/Probe Response frames",
params->wpa_ie, params->wpa_ie_len);
NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
params->wpa_ie);
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
ret, strerror(-ret));
count++;
if (ret == -EALREADY && count == 1) {
wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
"forced leave");
nl80211_leave_ibss(drv);
nlmsg_free(msg);
goto retry;
}
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_connect(
struct wpa_driver_nl80211_data *drv,
struct wpa_driver_associate_params *params)
{
struct nl_msg *msg;
enum nl80211_auth_type type;
int ret = 0;
msg = nlmsg_alloc();
if (!msg)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_CONNECT, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->bssid) {
wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
MAC2STR(params->bssid));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
}
if (params->freq) {
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
}
if (params->ssid) {
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
if (params->ssid_len > sizeof(drv->ssid))
goto nla_put_failure;
os_memcpy(drv->ssid, params->ssid, params->ssid_len);
drv->ssid_len = params->ssid_len;
}
wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
if (params->wpa_ie)
NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
params->wpa_ie);
if (params->auth_alg & WPA_AUTH_ALG_OPEN)
type = NL80211_AUTHTYPE_OPEN_SYSTEM;
else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
type = NL80211_AUTHTYPE_SHARED_KEY;
else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
type = NL80211_AUTHTYPE_NETWORK_EAP;
else if (params->auth_alg & WPA_AUTH_ALG_FT)
type = NL80211_AUTHTYPE_FT;
else
goto nla_put_failure;
wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
if (params->wpa_ie && params->wpa_ie_len) {
enum nl80211_wpa_versions ver;
if (params->wpa_ie[0] == WLAN_EID_RSN)
ver = NL80211_WPA_VERSION_2;
else
ver = NL80211_WPA_VERSION_1;
wpa_printf(MSG_DEBUG, " * WPA Version %d", ver);
NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
}
if (params->pairwise_suite != CIPHER_NONE) {
int cipher;
switch (params->pairwise_suite) {
case CIPHER_WEP40:
cipher = WLAN_CIPHER_SUITE_WEP40;
break;
case CIPHER_WEP104:
cipher = WLAN_CIPHER_SUITE_WEP104;
break;
case CIPHER_CCMP:
cipher = WLAN_CIPHER_SUITE_CCMP;
break;
case CIPHER_TKIP:
default:
cipher = WLAN_CIPHER_SUITE_TKIP;
break;
}
NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
}
if (params->group_suite != CIPHER_NONE) {
int cipher;
switch (params->group_suite) {
case CIPHER_WEP40:
cipher = WLAN_CIPHER_SUITE_WEP40;
break;
case CIPHER_WEP104:
cipher = WLAN_CIPHER_SUITE_WEP104;
break;
case CIPHER_CCMP:
cipher = WLAN_CIPHER_SUITE_CCMP;
break;
case CIPHER_TKIP:
default:
cipher = WLAN_CIPHER_SUITE_TKIP;
break;
}
NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
}
if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
params->key_mgmt_suite == KEY_MGMT_PSK) {
int mgmt = WLAN_AKM_SUITE_PSK;
switch (params->key_mgmt_suite) {
case KEY_MGMT_802_1X:
mgmt = WLAN_AKM_SUITE_8021X;
break;
case KEY_MGMT_PSK:
default:
mgmt = WLAN_AKM_SUITE_PSK;
break;
}
NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
}
ret = nl80211_set_conn_keys(params, msg);
if (ret)
goto nla_put_failure;
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_associate(
void *priv, struct wpa_driver_associate_params *params)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1;
struct nl_msg *msg;
if (params->mode == IEEE80211_MODE_AP)
return wpa_driver_nl80211_ap(drv, params);
if (params->mode == IEEE80211_MODE_IBSS)
return wpa_driver_nl80211_ibss(drv, params);
if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
return -1;
return wpa_driver_nl80211_connect(drv, params);
}
drv->associated = 0;
msg = nlmsg_alloc();
if (!msg)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
drv->ifindex);
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_ASSOCIATE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
if (params->bssid) {
wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
MAC2STR(params->bssid));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
}
if (params->freq) {
wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
drv->assoc_freq = params->freq;
} else
drv->assoc_freq = 0;
if (params->ssid) {
wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
params->ssid, params->ssid_len);
NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
params->ssid);
if (params->ssid_len > sizeof(drv->ssid))
goto nla_put_failure;
os_memcpy(drv->ssid, params->ssid, params->ssid_len);
drv->ssid_len = params->ssid_len;
}
wpa_hexdump(MSG_DEBUG, " * IEs", params->wpa_ie, params->wpa_ie_len);
if (params->wpa_ie)
NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
params->wpa_ie);
#ifdef CONFIG_IEEE80211W
if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
#endif /* CONFIG_IEEE80211W */
NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
if (params->prev_bssid) {
wpa_printf(MSG_DEBUG, " * prev_bssid=" MACSTR,
MAC2STR(params->prev_bssid));
NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
params->prev_bssid);
}
if (params->p2p)
wpa_printf(MSG_DEBUG, " * P2P group");
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
"(%s)", ret, strerror(-ret));
nl80211_dump_scan(drv);
goto nla_put_failure;
}
ret = 0;
wpa_printf(MSG_DEBUG, "nl80211: Association request send "
"successfully");
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
int ifindex, int mode)
{
struct nl_msg *msg;
int ret = -ENOBUFS;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_INTERFACE, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (!ret)
return 0;
nla_put_failure:
wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
" %d (%s)", ifindex, mode, ret, strerror(-ret));
return ret;
}
static int wpa_driver_nl80211_set_mode(void *priv, int mode)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1;
int nlmode;
int i;
switch (mode) {
case 0:
nlmode = NL80211_IFTYPE_STATION;
break;
case 1:
nlmode = NL80211_IFTYPE_ADHOC;
break;
case 2:
nlmode = NL80211_IFTYPE_AP;
break;
default:
return -1;
}
if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
drv->nlmode = nlmode;
ret = 0;
goto done;
}
if (nlmode == drv->nlmode) {
wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
"requested mode - ignore error");
ret = 0;
goto done; /* Already in the requested mode */
}
/* mac80211 doesn't allow mode changes while the device is up, so
* take the device down, try to set the mode again, and bring the
* device back up.
*/
wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
"interface down");
for (i = 0; i < 10; i++) {
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
0) {
/* Try to set the mode again while the interface is
* down */
ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
1))
ret = -1;
if (!ret)
break;
} else
wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
"interface down");
os_sleep(0, 100000);
}
if (!ret) {
wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
"interface is down");
drv->nlmode = nlmode;
}
done:
if (!ret && nlmode == NL80211_IFTYPE_AP) {
/* Setup additional AP mode functionality if needed */
if (drv->monitor_ifidx < 0 &&
nl80211_create_monitor_interface(drv))
return -1;
} else if (!ret && nlmode != NL80211_IFTYPE_AP) {
/* Remove additional AP mode functionality */
nl80211_remove_monitor_interface(drv);
bss->beacon_set = 0;
}
if (ret)
wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
"from %d failed", nlmode, drv->nlmode);
return ret;
}
static int wpa_driver_nl80211_get_capa(void *priv,
struct wpa_driver_capa *capa)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (!drv->has_capability)
return -1;
os_memcpy(capa, &drv->capa, sizeof(*capa));
return 0;
}
static int wpa_driver_nl80211_set_operstate(void *priv, int state)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
__func__, drv->operstate, state, state ? "UP" : "DORMANT");
drv->operstate = state;
return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
state ? IF_OPER_UP : IF_OPER_DORMANT);
}
static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
struct nl80211_sta_flag_update upd;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(bss->ifname));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
os_memset(&upd, 0, sizeof(upd));
upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
if (authorized)
upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
#ifdef HOSTAPD
static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
int i;
int *old;
wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
ifidx);
for (i = 0; i < drv->num_if_indices; i++) {
if (drv->if_indices[i] == 0) {
drv->if_indices[i] = ifidx;
return;
}
}
if (drv->if_indices != drv->default_if_indices)
old = drv->if_indices;
else
old = NULL;
drv->if_indices = os_realloc(old,
sizeof(int) * (drv->num_if_indices + 1));
if (!drv->if_indices) {
if (!old)
drv->if_indices = drv->default_if_indices;
else
drv->if_indices = old;
wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
"interfaces");
wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
return;
} else if (!old)
os_memcpy(drv->if_indices, drv->default_if_indices,
sizeof(drv->default_if_indices));
drv->if_indices[drv->num_if_indices] = ifidx;
drv->num_if_indices++;
}
static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
int i;
for (i = 0; i < drv->num_if_indices; i++) {
if (drv->if_indices[i] == ifidx) {
drv->if_indices[i] = 0;
break;
}
}
}
static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
int i;
for (i = 0; i < drv->num_if_indices; i++)
if (drv->if_indices[i] == ifidx)
return 1;
return 0;
}
static inline int min_int(int a, int b)
{
if (a < b)
return a;
return b;
}
static int get_key_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
/*
* TODO: validate the key index and mac address!
* Otherwise, there's a race condition as soon as
* the kernel starts sending key notifications.
*/
if (tb[NL80211_ATTR_KEY_SEQ])
memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
return NL_SKIP;
}
static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
int idx, u8 *seq)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_KEY, 0);
if (addr)
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
memset(seq, 0, 6);
return send_and_recv_msgs(drv, msg, get_key_handler, seq);
nla_put_failure:
return -ENOBUFS;
}
static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
int mode)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
u8 rates[NL80211_MAX_SUPP_RATES];
u8 rates_len = 0;
int i;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_SET_BSS, 0);
for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
rates[rates_len++] = basic_rates[i] / 5;
NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
#endif /* HOSTAPD */
/* Set kernel driver on given frequency (MHz) */
static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
freq->sec_channel_offset);
}
#ifdef HOSTAPD
static int i802_set_rts(void *priv, int rts)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret = -ENOBUFS;
u32 val;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
if (rts >= 2347)
val = (u32) -1;
else
val = rts;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (!ret)
return 0;
nla_put_failure:
wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
"%d (%s)", rts, ret, strerror(-ret));
return ret;
}
static int i802_set_frag(void *priv, int frag)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret = -ENOBUFS;
u32 val;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
if (frag >= 2346)
val = (u32) -1;
else
val = frag;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (!ret)
return 0;
nla_put_failure:
wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
"%d: %d (%s)", frag, ret, strerror(-ret));
return ret;
}
static int i802_flush(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_DEL_STATION, 0);
/*
* XXX: FIX! this needs to flush all VLANs too
*/
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(bss->ifname));
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
static int get_sta_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
struct hostap_sta_driver_data *data = arg;
struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
[NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
[NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
[NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
[NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
[NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
};
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
/*
* TODO: validate the interface and mac address!
* Otherwise, there's a race condition as soon as
* the kernel starts sending station notifications.
*/
if (!tb[NL80211_ATTR_STA_INFO]) {
wpa_printf(MSG_DEBUG, "sta stats missing!");
return NL_SKIP;
}
if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
tb[NL80211_ATTR_STA_INFO],
stats_policy)) {
wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
return NL_SKIP;
}
if (stats[NL80211_STA_INFO_INACTIVE_TIME])
data->inactive_msec =
nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
if (stats[NL80211_STA_INFO_RX_BYTES])
data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
if (stats[NL80211_STA_INFO_TX_BYTES])
data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
if (stats[NL80211_STA_INFO_RX_PACKETS])
data->rx_packets =
nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
if (stats[NL80211_STA_INFO_TX_PACKETS])
data->tx_packets =
nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
return NL_SKIP;
}
static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
const u8 *addr)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
os_memset(data, 0, sizeof(*data));
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_GET_STATION, 0);
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
return send_and_recv_msgs(drv, msg, get_sta_handler, data);
nla_put_failure:
return -ENOBUFS;
}
static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
int cw_min, int cw_max, int burst_time)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
struct nlattr *txq, *params;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_WIPHY, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
if (!txq)
goto nla_put_failure;
/* We are only sending parameters for a single TXQ at a time */
params = nla_nest_start(msg, 1);
if (!params)
goto nla_put_failure;
switch (queue) {
case 0:
NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VO);
break;
case 1:
NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VI);
break;
case 2:
NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BE);
break;
case 3:
NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BK);
break;
}
/* Burst time is configured in units of 0.1 msec and TXOP parameter in
* 32 usec, so need to convert the value here. */
NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
nla_nest_end(msg, params);
nla_nest_end(msg, txq);
if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
return 0;
nla_put_failure:
return -1;
}
static int i802_set_bss(void *priv, int cts, int preamble, int slot)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_SET_BSS, 0);
if (cts >= 0)
NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
if (preamble >= 0)
NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
if (slot >= 0)
NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
static int i802_set_cts_protect(void *priv, int value)
{
return i802_set_bss(priv, value, -1, -1);
}
static int i802_set_preamble(void *priv, int value)
{
return i802_set_bss(priv, -1, value, -1);
}
static int i802_set_short_slot_time(void *priv, int value)
{
return i802_set_bss(priv, -1, -1, value);
}
static int i802_set_sta_vlan(void *priv, const u8 *addr,
const char *ifname, int vlan_id)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret = -ENOBUFS;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_STATION, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
if_nametoindex(bss->ifname));
NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
if_nametoindex(ifname));
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret < 0) {
wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
MAC2STR(addr), ifname, vlan_id, ret,
strerror(-ret));
}
nla_put_failure:
return ret;
}
static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val,
const char *bridge_ifname)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
char name[IFNAMSIZ + 1];
os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
" aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
if (val) {
if (!if_nametoindex(name)) {
if (nl80211_create_iface(drv, name,
NL80211_IFTYPE_AP_VLAN,
NULL, 1) < 0)
return -1;
if (bridge_ifname &&
linux_br_add_if(drv->ioctl_sock, bridge_ifname,
name) < 0)
return -1;
}
linux_set_iface_flags(drv->ioctl_sock, name, 1);
return i802_set_sta_vlan(priv, addr, name, 0);
} else {
i802_set_sta_vlan(priv, addr, bss->ifname, 0);
return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
name);
}
}
static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
{
struct wpa_driver_nl80211_data *drv = eloop_ctx;
struct sockaddr_ll lladdr;
unsigned char buf[3000];
int len;
socklen_t fromlen = sizeof(lladdr);
len = recvfrom(sock, buf, sizeof(buf), 0,
(struct sockaddr *)&lladdr, &fromlen);
if (len < 0) {
perror("recv");
return;
}
if (have_ifidx(drv, lladdr.sll_ifindex))
drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
}
static int i802_get_inact_sec(void *priv, const u8 *addr)
{
struct hostap_sta_driver_data data;
int ret;
data.inactive_msec = (unsigned long) -1;
ret = i802_read_sta_data(priv, &data, addr);
if (ret || data.inactive_msec == (unsigned long) -1)
return -1;
return data.inactive_msec / 1000;
}
static int i802_sta_clear_stats(void *priv, const u8 *addr)
{
#if 0
/* TODO */
#endif
return 0;
}
static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
int reason)
{
struct i802_bss *bss = priv;
struct ieee80211_mgmt mgmt;
memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DEAUTH);
memcpy(mgmt.da, addr, ETH_ALEN);
memcpy(mgmt.sa, own_addr, ETH_ALEN);
memcpy(mgmt.bssid, own_addr, ETH_ALEN);
mgmt.u.deauth.reason_code = host_to_le16(reason);
return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
IEEE80211_HDRLEN +
sizeof(mgmt.u.deauth));
}
static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
int reason)
{
struct i802_bss *bss = priv;
struct ieee80211_mgmt mgmt;
memset(&mgmt, 0, sizeof(mgmt));
mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
WLAN_FC_STYPE_DISASSOC);
memcpy(mgmt.da, addr, ETH_ALEN);
memcpy(mgmt.sa, own_addr, ETH_ALEN);
memcpy(mgmt.bssid, own_addr, ETH_ALEN);
mgmt.u.disassoc.reason_code = host_to_le16(reason);
return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
IEEE80211_HDRLEN +
sizeof(mgmt.u.disassoc));
}
static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
const char *brname, const char *ifname)
{
int ifindex;
char in_br[IFNAMSIZ];
os_strlcpy(drv->brname, brname, IFNAMSIZ);
ifindex = if_nametoindex(brname);
if (ifindex == 0) {
/*
* Bridge was configured, but the bridge device does
* not exist. Try to add it now.
*/
if (linux_br_add(drv->ioctl_sock, brname) < 0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
"bridge interface %s: %s",
brname, strerror(errno));
return -1;
}
drv->added_bridge = 1;
add_ifidx(drv, if_nametoindex(brname));
}
if (linux_br_get(in_br, ifname) == 0) {
if (os_strcmp(in_br, brname) == 0)
return 0; /* already in the bridge */
wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
"bridge %s", ifname, in_br);
if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to "
"remove interface %s from bridge "
"%s: %s",
ifname, brname, strerror(errno));
return -1;
}
}
wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
ifname, brname);
if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
"into bridge %s: %s",
ifname, brname, strerror(errno));
return -1;
}
drv->added_if_into_bridge = 1;
return 0;
}
static void *i802_init(struct hostapd_data *hapd,
struct wpa_init_params *params)
{
struct wpa_driver_nl80211_data *drv;
struct i802_bss *bss;
size_t i;
char brname[IFNAMSIZ];
int ifindex, br_ifindex;
int br_added = 0;
bss = wpa_driver_nl80211_init(hapd, params->ifname, NULL);
if (bss == NULL)
return NULL;
drv = bss->drv;
if (linux_br_get(brname, params->ifname) == 0) {
wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
params->ifname, brname);
br_ifindex = if_nametoindex(brname);
} else {
brname[0] = '\0';
br_ifindex = 0;
}
drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
drv->if_indices = drv->default_if_indices;
for (i = 0; i < params->num_bridge; i++) {
if (params->bridge[i]) {
ifindex = if_nametoindex(params->bridge[i]);
if (ifindex)
add_ifidx(drv, ifindex);
if (ifindex == br_ifindex)
br_added = 1;
}
}
if (!br_added && br_ifindex &&
(params->num_bridge == 0 || !params->bridge[0]))
add_ifidx(drv, br_ifindex);
/* start listening for EAPOL on the default AP interface */
add_ifidx(drv, drv->ifindex);
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
goto failed;
if (params->bssid) {
if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
params->bssid))
goto failed;
}
if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
"into AP mode", bss->ifname);
goto failed;
}
if (params->num_bridge && params->bridge[0] &&
i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
goto failed;
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
goto failed;
drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
if (drv->eapol_sock < 0) {
perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
goto failed;
}
if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
{
printf("Could not register read socket for eapol\n");
goto failed;
}
if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
goto failed;
return bss;
failed:
nl80211_remove_monitor_interface(drv);
if (drv->ioctl_sock >= 0)
close(drv->ioctl_sock);
genl_family_put(drv->nl80211);
nl_cache_free(drv->nl_cache);
nl80211_handle_destroy(drv->nl_handle);
nl_cb_put(drv->nl_cb);
os_free(drv);
return NULL;
}
static void i802_deinit(void *priv)
{
wpa_driver_nl80211_deinit(priv);
}
#endif /* HOSTAPD */
static enum nl80211_iftype wpa_driver_nl80211_if_type(
enum wpa_driver_if_type type)
{
switch (type) {
case WPA_IF_STATION:
case WPA_IF_P2P_CLIENT:
case WPA_IF_P2P_GROUP:
return NL80211_IFTYPE_STATION;
case WPA_IF_AP_VLAN:
return NL80211_IFTYPE_AP_VLAN;
case WPA_IF_AP_BSS:
case WPA_IF_P2P_GO:
return NL80211_IFTYPE_AP;
}
return -1;
}
static int nl80211_addr_in_use(struct nl80211_global *global, const u8 *addr)
{
struct wpa_driver_nl80211_data *drv;
dl_list_for_each(drv, &global->interfaces,
struct wpa_driver_nl80211_data, list) {
if (os_memcmp(addr, drv->addr, ETH_ALEN) == 0)
return 1;
}
return 0;
}
static int nl80211_p2p_interface_addr(struct wpa_driver_nl80211_data *drv,
u8 *new_addr)
{
unsigned int idx;
if (!drv->global)
return -1;
os_memcpy(new_addr, drv->addr, ETH_ALEN);
for (idx = 0; idx < 64; idx++) {
new_addr[0] = drv->addr[0] | 0x02;
new_addr[0] ^= idx << 2;
if (!nl80211_addr_in_use(drv->global, new_addr))
break;
}
if (idx == 64)
return -1;
wpa_printf(MSG_DEBUG, "nl80211: Assigned new P2P Interface Address "
MACSTR, MAC2STR(new_addr));
return 0;
}
static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
const char *ifname, const u8 *addr,
void *bss_ctx, void **drv_priv,
char *force_ifname, u8 *if_addr)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ifidx;
#ifdef HOSTAPD
struct i802_bss *new_bss = NULL;
if (type == WPA_IF_AP_BSS) {
new_bss = os_zalloc(sizeof(*new_bss));
if (new_bss == NULL)
return -1;
}
#endif /* HOSTAPD */
if (addr)
os_memcpy(if_addr, addr, ETH_ALEN);
ifidx = nl80211_create_iface(drv, ifname,
wpa_driver_nl80211_if_type(type), addr,
0);
if (ifidx < 0) {
#ifdef HOSTAPD
os_free(new_bss);
#endif /* HOSTAPD */
return -1;
}
if (!addr &&
linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
#ifdef CONFIG_P2P
if (!addr &&
(type == WPA_IF_P2P_CLIENT || type == WPA_IF_P2P_GROUP ||
type == WPA_IF_P2P_GO)) {
/* Enforce unique P2P Interface Address */
u8 new_addr[ETH_ALEN], own_addr[ETH_ALEN];
if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr)
< 0 ||
linux_get_ifhwaddr(drv->ioctl_sock, ifname, new_addr) < 0)
{
nl80211_remove_iface(drv, ifidx);
return -1;
}
if (os_memcmp(own_addr, new_addr, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG, "nl80211: Allocate new address "
"for P2P group interface");
if (nl80211_p2p_interface_addr(drv, new_addr) < 0) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
if (linux_set_ifhwaddr(drv->ioctl_sock, ifname,
new_addr) < 0) {
nl80211_remove_iface(drv, ifidx);
return -1;
}
os_memcpy(if_addr, new_addr, ETH_ALEN);
}
}
#endif /* CONFIG_P2P */
#ifdef HOSTAPD
if (type == WPA_IF_AP_BSS) {
if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
nl80211_remove_iface(drv, ifidx);
os_free(new_bss);
return -1;
}
os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
new_bss->ifindex = ifidx;
new_bss->drv = drv;
new_bss->next = drv->first_bss.next;
drv->first_bss.next = new_bss;
if (drv_priv)
*drv_priv = new_bss;
}
#endif /* HOSTAPD */
return 0;
}
static int wpa_driver_nl80211_if_remove(void *priv,
enum wpa_driver_if_type type,
const char *ifname)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ifindex = if_nametoindex(ifname);
wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
__func__, type, ifname, ifindex);
if (ifindex <= 0)
return -1;
nl80211_remove_iface(drv, ifindex);
#ifdef HOSTAPD
if (type != WPA_IF_AP_BSS)
return 0;
if (bss != &drv->first_bss) {
struct i802_bss *tbss = &drv->first_bss;
while (tbss) {
if (tbss->next != bss)
continue;
tbss->next = bss->next;
os_free(bss);
break;
}
}
#endif /* HOSTAPD */
return 0;
}
static int cookie_handler(struct nl_msg *msg, void *arg)
{
struct nlattr *tb[NL80211_ATTR_MAX + 1];
struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
u64 *cookie = arg;
nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
genlmsg_attrlen(gnlh, 0), NULL);
if (tb[NL80211_ATTR_COOKIE])
*cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
return NL_SKIP;
}
static int nl80211_send_frame_cmd(struct wpa_driver_nl80211_data *drv,
unsigned int freq, const u8 *buf,
size_t buf_len, u64 *cookie_out)
{
struct nl_msg *msg;
u64 cookie;
int ret = -1;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_FRAME, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
NLA_PUT(msg, NL80211_ATTR_FRAME, buf_len, buf);
cookie = 0;
ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Frame command failed: ret=%d "
"(%s)", ret, strerror(-ret));
goto nla_put_failure;
}
wpa_printf(MSG_DEBUG, "nl80211: Frame TX command accepted; "
"cookie 0x%llx", (long long unsigned int) cookie);
if (cookie_out)
*cookie_out = cookie;
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
const u8 *dst, const u8 *src,
const u8 *bssid,
const u8 *data, size_t data_len)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret = -1;
u8 *buf;
struct ieee80211_hdr *hdr;
wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
drv->ifindex);
buf = os_zalloc(24 + data_len);
if (buf == NULL)
return ret;
os_memcpy(buf + 24, data, data_len);
hdr = (struct ieee80211_hdr *) buf;
hdr->frame_control =
IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
os_memcpy(hdr->addr1, dst, ETH_ALEN);
os_memcpy(hdr->addr2, src, ETH_ALEN);
os_memcpy(hdr->addr3, bssid, ETH_ALEN);
if (drv->nlmode == NL80211_IFTYPE_AP)
ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
else
ret = nl80211_send_frame_cmd(drv, freq, buf, 24 + data_len,
&drv->send_action_cookie);
os_free(buf);
return ret;
}
static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
unsigned int duration)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret;
u64 cookie;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_REMAIN_ON_CHANNEL, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
cookie = 0;
ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
if (ret == 0) {
wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
"0x%llx for freq=%u MHz duration=%u",
(long long unsigned int) cookie, freq, duration);
drv->remain_on_chan_cookie = cookie;
return 0;
}
wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
"(freq=%d duration=%u): %d (%s)",
freq, duration, ret, strerror(-ret));
nla_put_failure:
return -1;
}
static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
int ret;
if (!drv->pending_remain_on_chan) {
wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
"to cancel");
return -1;
}
wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
"0x%llx",
(long long unsigned int) drv->remain_on_chan_cookie);
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
if (ret == 0)
return 0;
wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
"%d (%s)", ret, strerror(-ret));
nla_put_failure:
return -1;
}
static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (drv->nlmode != NL80211_IFTYPE_STATION) {
wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
"allowed in station mode (iftype=%d)",
drv->nlmode);
return -1;
}
if (!report) {
if (drv->nl_handle_preq) {
eloop_unregister_read_sock(
nl_socket_get_fd(drv->nl_handle_preq));
nl_cache_free(drv->nl_cache_preq);
nl80211_handle_destroy(drv->nl_handle_preq);
drv->nl_handle_preq = NULL;
}
return 0;
}
if (drv->nl_handle_preq) {
wpa_printf(MSG_DEBUG, "nl80211: Probe Request reporting "
"already on!");
return 0;
}
drv->nl_handle_preq = nl80211_handle_alloc(drv->nl_cb);
if (drv->nl_handle_preq == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate "
"netlink callbacks (preq)");
goto out_err1;
}
if (genl_connect(drv->nl_handle_preq)) {
wpa_printf(MSG_ERROR, "nl80211: Failed to connect to "
"generic netlink (preq)");
goto out_err2;
return -1;
}
#ifdef CONFIG_LIBNL20
if (genl_ctrl_alloc_cache(drv->nl_handle_preq,
&drv->nl_cache_preq) < 0) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache (preq)");
goto out_err2;
}
#else /* CONFIG_LIBNL20 */
drv->nl_cache_preq = genl_ctrl_alloc_cache(drv->nl_handle_preq);
if (drv->nl_cache_preq == NULL) {
wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
"netlink cache (preq)");
goto out_err2;
}
#endif /* CONFIG_LIBNL20 */
if (nl80211_register_frame(drv, drv->nl_handle_preq,
(WLAN_FC_TYPE_MGMT << 2) |
(WLAN_FC_STYPE_PROBE_REQ << 4),
NULL, 0) < 0) {
goto out_err3;
}
eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_preq),
wpa_driver_nl80211_event_receive, drv,
drv->nl_handle_preq);
return 0;
out_err3:
nl_cache_free(drv->nl_cache_preq);
out_err2:
nl80211_handle_destroy(drv->nl_handle_preq);
drv->nl_handle_preq = NULL;
out_err1:
return -1;
}
static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
int ifindex, int disabled)
{
struct nl_msg *msg;
struct nlattr *bands, *band;
int ret;
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_SET_TX_BITRATE_MASK, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
if (!bands)
goto nla_put_failure;
/*
* Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
* else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
* rates. All 5 GHz rates are left enabled.
*/
band = nla_nest_start(msg, NL80211_BAND_2GHZ);
if (!band)
goto nla_put_failure;
NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
"\x0c\x12\x18\x24\x30\x48\x60\x6c");
nla_nest_end(msg, band);
nla_nest_end(msg, bands);
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL;
if (ret) {
wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
"(%s)", ret, strerror(-ret));
}
return ret;
nla_put_failure:
nlmsg_free(msg);
return -1;
}
static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
drv->disable_11b_rates = disabled;
return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
}
static int wpa_driver_nl80211_deinit_ap(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (drv->nlmode != NL80211_IFTYPE_AP)
return -1;
wpa_driver_nl80211_del_beacon(drv);
return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
}
static void wpa_driver_nl80211_resume(void *priv)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
"resume event");
}
}
static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
const u8 *ies, size_t ies_len)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
int ret;
u8 *data, *pos;
size_t data_len;
u8 own_addr[ETH_ALEN];
if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
return -1;
if (action != 1) {
wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
"action %d", action);
return -1;
}
/*
* Action frame payload:
* Category[1] = 6 (Fast BSS Transition)
* Action[1] = 1 (Fast BSS Transition Request)
* STA Address
* Target AP Address
* FT IEs
*/
data_len = 2 + 2 * ETH_ALEN + ies_len;
data = os_malloc(data_len);
if (data == NULL)
return -1;
pos = data;
*pos++ = 0x06; /* FT Action category */
*pos++ = action;
os_memcpy(pos, own_addr, ETH_ALEN);
pos += ETH_ALEN;
os_memcpy(pos, target_ap, ETH_ALEN);
pos += ETH_ALEN;
os_memcpy(pos, ies, ies_len);
ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
own_addr, drv->bssid,
data, data_len);
os_free(data);
return ret;
}
static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg, *cqm = NULL;
wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
"hysteresis=%d", threshold, hysteresis);
msg = nlmsg_alloc();
if (!msg)
return -1;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
0, NL80211_CMD_SET_CQM, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
cqm = nlmsg_alloc();
if (cqm == NULL)
return -1;
NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
return 0;
msg = NULL;
nla_put_failure:
if (cqm)
nlmsg_free(cqm);
nlmsg_free(msg);
return -1;
}
static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
int encrypt)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
}
static int nl80211_set_intra_bss(void *priv, int enabled)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
struct nl_msg *msg;
msg = nlmsg_alloc();
if (!msg)
return -ENOMEM;
genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
NL80211_CMD_SET_BSS, 0);
NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
NLA_PUT_U8(msg, NL80211_ATTR_AP_ISOLATE, !enabled);
return send_and_recv_msgs(drv, msg, NULL, NULL);
nla_put_failure:
return -ENOBUFS;
}
static int nl80211_set_param(void *priv, const char *param)
{
struct i802_bss *bss = priv;
struct wpa_driver_nl80211_data *drv = bss->drv;
wpa_printf(MSG_DEBUG, "nl80211: driver param='%s'", param);
if (param == NULL)
return 0;
#ifdef CONFIG_P2P
if (os_strstr(param, "use_p2p_group_interface=1")) {
wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
"interface");
drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
}
#endif /* CONFIG_P2P */
return 0;
}
static void * nl80211_global_init(void)
{
struct nl80211_global *global;
global = os_zalloc(sizeof(*global));
if (global == NULL)
return NULL;
dl_list_init(&global->interfaces);
return global;
}
static void nl80211_global_deinit(void *priv)
{
struct nl80211_global *global = priv;
if (global == NULL)
return;
if (!dl_list_empty(&global->interfaces)) {
wpa_printf(MSG_ERROR, "nl80211: %u interface(s) remain at "
"nl80211_global_deinit",
dl_list_len(&global->interfaces));
}
os_free(global);
}
const struct wpa_driver_ops wpa_driver_nl80211_ops = {
.name = "nl80211",
.desc = "Linux nl80211/cfg80211",
.get_bssid = wpa_driver_nl80211_get_bssid,
.get_ssid = wpa_driver_nl80211_get_ssid,
.set_key = wpa_driver_nl80211_set_key,
.scan2 = wpa_driver_nl80211_scan,
.get_scan_results2 = wpa_driver_nl80211_get_scan_results,
.deauthenticate = wpa_driver_nl80211_deauthenticate,
.disassociate = wpa_driver_nl80211_disassociate,
.authenticate = wpa_driver_nl80211_authenticate,
.associate = wpa_driver_nl80211_associate,
.global_init = nl80211_global_init,
.global_deinit = nl80211_global_deinit,
.init2 = wpa_driver_nl80211_init,
.deinit = wpa_driver_nl80211_deinit,
.get_capa = wpa_driver_nl80211_get_capa,
.set_operstate = wpa_driver_nl80211_set_operstate,
.set_supp_port = wpa_driver_nl80211_set_supp_port,
.set_country = wpa_driver_nl80211_set_country,
.set_beacon = wpa_driver_nl80211_set_beacon,
.if_add = wpa_driver_nl80211_if_add,
.if_remove = wpa_driver_nl80211_if_remove,
.send_mlme = wpa_driver_nl80211_send_mlme,
.get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
.sta_add = wpa_driver_nl80211_sta_add,
.sta_remove = wpa_driver_nl80211_sta_remove,
.hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
.sta_set_flags = wpa_driver_nl80211_sta_set_flags,
#ifdef HOSTAPD
.hapd_init = i802_init,
.hapd_deinit = i802_deinit,
.get_seqnum = i802_get_seqnum,
.flush = i802_flush,
.read_sta_data = i802_read_sta_data,
.sta_deauth = i802_sta_deauth,
.sta_disassoc = i802_sta_disassoc,
.get_inact_sec = i802_get_inact_sec,
.sta_clear_stats = i802_sta_clear_stats,
.set_rts = i802_set_rts,
.set_frag = i802_set_frag,
.set_rate_sets = i802_set_rate_sets,
.set_cts_protect = i802_set_cts_protect,
.set_preamble = i802_set_preamble,
.set_short_slot_time = i802_set_short_slot_time,
.set_tx_queue_params = i802_set_tx_queue_params,
.set_sta_vlan = i802_set_sta_vlan,
.set_wds_sta = i802_set_wds_sta,
#endif /* HOSTAPD */
.set_freq = i802_set_freq,
.send_action = wpa_driver_nl80211_send_action,
.remain_on_channel = wpa_driver_nl80211_remain_on_channel,
.cancel_remain_on_channel =
wpa_driver_nl80211_cancel_remain_on_channel,
.probe_req_report = wpa_driver_nl80211_probe_req_report,
.disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
.deinit_ap = wpa_driver_nl80211_deinit_ap,
.resume = wpa_driver_nl80211_resume,
.send_ft_action = nl80211_send_ft_action,
.signal_monitor = nl80211_signal_monitor,
.send_frame = nl80211_send_frame,
.set_intra_bss = nl80211_set_intra_bss,
.set_param = nl80211_set_param,
};
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