int (*del_tx_ts)(void *priv, u8 tsid, const u8 *addr);
/**
+ * Enable channel-switching with TDLS peer
+ * @priv: Private driver interface data
+ * @addr: MAC address of the TDLS peer
+ * @oper_class: Operating class of the switch channel
+ * @params: Channel specification
+ * Returns: 0 on success, -1 on failure
+ *
+ * The function indicates to driver that it can start switching to a
+ * different channel with a specified TDLS peer. The switching is
+ * assumed on until canceled with tdls_disable_channel_switch().
+ */
+ int (*tdls_enable_channel_switch)(
+ void *priv, const u8 *addr, u8 oper_class,
+ const struct hostapd_freq_params *params);
+
+ /**
+ * Disable channel switching with TDLS peer
+ * @priv: Private driver interface data
+ * @addr: MAC address of the TDLS peer
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function indicates to the driver that it should stop switching
+ * with a given TDLS peer.
+ */
+ int (*tdls_disable_channel_switch)(void *priv, const u8 *addr);
+
+ /**
* start_dfs_cac - Listen for radar interference on the channel
* @priv: Private driver interface data
* @freq: Channel parameters
size_t supp_oper_classes_len;
u8 wmm_capable;
+
+ /* channel switch currently enabled */
+ int chan_switch_enabled;
};
peer->qos_info = 0;
peer->wmm_capable = 0;
peer->tpk_set = peer->tpk_success = 0;
+ peer->chan_switch_enabled = 0;
os_memset(&peer->tpk, 0, sizeof(peer->tpk));
os_memset(peer->inonce, 0, WPA_NONCE_LEN);
os_memset(peer->rnonce, 0, WPA_NONCE_LEN);
return 0;
}
+ /* Cancel active channel switch before teardown */
+ if (peer->chan_switch_enabled) {
+ wpa_printf(MSG_DEBUG, "TDLS: First returning link with " MACSTR
+ " to base channel", MAC2STR(addr));
+ wpa_sm_tdls_disable_channel_switch(sm, peer->addr);
+ }
+
dialog_token = peer->dtoken;
wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown for " MACSTR,
if (wpa_tdls_is_external_setup(sm)) {
/*
- * Disable the link, send a teardown packet through the
- * AP, and then reset link data.
+ * Get us on the base channel, disable the link, send a
+ * teardown packet through the AP, and then reset link data.
*/
+ if (peer->chan_switch_enabled)
+ wpa_sm_tdls_disable_channel_switch(sm, peer->addr);
wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr);
wpa_tdls_send_teardown(sm, addr,
WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE);
{
return sm->tdls_external_setup;
}
+
+
+int wpa_tdls_enable_chan_switch(struct wpa_sm *sm, const u8 *addr,
+ u8 oper_class,
+ struct hostapd_freq_params *freq_params)
+{
+ struct wpa_tdls_peer *peer;
+ int ret;
+
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return -1;
+
+ if (!sm->tdls_chan_switch) {
+ wpa_printf(MSG_DEBUG,
+ "TDLS: Channel switching not supported by the driver");
+ return -1;
+ }
+
+ if (sm->tdls_chan_switch_prohibited) {
+ wpa_printf(MSG_DEBUG,
+ "TDLS: Channel switching is prohibited in this BSS - reject request to switch channel");
+ return -1;
+ }
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (peer == NULL || !peer->tpk_success) {
+ wpa_printf(MSG_ERROR, "TDLS: Peer " MACSTR
+ " not found for channel switching", MAC2STR(addr));
+ return -1;
+ }
+
+ if (peer->chan_switch_enabled) {
+ wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
+ " already has channel switching enabled",
+ MAC2STR(addr));
+ return 0;
+ }
+
+ ret = wpa_sm_tdls_enable_channel_switch(sm, peer->addr,
+ oper_class, freq_params);
+ if (!ret)
+ peer->chan_switch_enabled = 1;
+
+ return ret;
+}
+
+
+int wpa_tdls_disable_chan_switch(struct wpa_sm *sm, const u8 *addr)
+{
+ struct wpa_tdls_peer *peer;
+
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return -1;
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (!peer || !peer->chan_switch_enabled) {
+ wpa_printf(MSG_ERROR, "TDLS: Channel switching not enabled for "
+ MACSTR, MAC2STR(addr));
+ return -1;
+ }
+
+ /* ignore the return value */
+ wpa_sm_tdls_disable_channel_switch(sm, peer->addr);
+
+ peer->chan_switch_enabled = 0;
+ return 0;
+}
struct wpa_sm;
struct eapol_sm;
struct wpa_config_blob;
+struct hostapd_freq_params;
struct wpa_sm_ctx {
void *ctx; /* pointer to arbitrary upper level context */
size_t supp_channels_len,
const u8 *supp_oper_classes,
size_t supp_oper_classes_len);
+ int (*tdls_enable_channel_switch)(
+ void *ctx, const u8 *addr, u8 oper_class,
+ const struct hostapd_freq_params *params);
+ int (*tdls_disable_channel_switch)(void *ctx, const u8 *addr);
#endif /* CONFIG_TDLS */
void (*set_rekey_offload)(void *ctx, const u8 *kek, const u8 *kck,
const u8 *replay_ctr);
void wpa_tdls_disable_unreachable_link(struct wpa_sm *sm, const u8 *addr);
const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_is_external_setup(struct wpa_sm *sm);
+int wpa_tdls_enable_chan_switch(struct wpa_sm *sm, const u8 *addr,
+ u8 oper_class,
+ struct hostapd_freq_params *freq_params);
+int wpa_tdls_disable_chan_switch(struct wpa_sm *sm, const u8 *addr);
int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 subelem_id, u8 *buf);
supp_oper_classes_len);
return -1;
}
+
+static inline int
+wpa_sm_tdls_enable_channel_switch(struct wpa_sm *sm, const u8 *addr,
+ u8 oper_class,
+ const struct hostapd_freq_params *freq_params)
+{
+ if (sm->ctx->tdls_enable_channel_switch)
+ return sm->ctx->tdls_enable_channel_switch(sm->ctx->ctx, addr,
+ oper_class,
+ freq_params);
+ return -1;
+}
+
+static inline int
+wpa_sm_tdls_disable_channel_switch(struct wpa_sm *sm, const u8 *addr)
+{
+ if (sm->ctx->tdls_disable_channel_switch)
+ return sm->ctx->tdls_disable_channel_switch(sm->ctx->ctx, addr);
+ return -1;
+}
#endif /* CONFIG_TDLS */
static inline int wpa_sm_key_mgmt_set_pmk(struct wpa_sm *sm,
return ret;
}
+
+static int wpa_supplicant_ctrl_iface_tdls_chan_switch(
+ struct wpa_supplicant *wpa_s, char *cmd)
+{
+ u8 peer[ETH_ALEN];
+ struct hostapd_freq_params freq_params;
+ u8 oper_class;
+ char *pos, *end;
+
+ if (!wpa_tdls_is_external_setup(wpa_s->wpa)) {
+ wpa_printf(MSG_INFO,
+ "tdls_chanswitch: Only supported with external setup");
+ return -1;
+ }
+
+ os_memset(&freq_params, 0, sizeof(freq_params));
+
+ pos = os_strchr(cmd, ' ');
+ if (pos == NULL)
+ return -1;
+ *pos++ = '\0';
+
+ oper_class = strtol(pos, &end, 10);
+ if (pos == end) {
+ wpa_printf(MSG_INFO,
+ "tdls_chanswitch: Invalid op class provided");
+ return -1;
+ }
+
+ pos = end;
+ freq_params.freq = atoi(pos);
+ if (freq_params.freq == 0) {
+ wpa_printf(MSG_INFO, "tdls_chanswitch: Invalid freq provided");
+ return -1;
+ }
+
+#define SET_FREQ_SETTING(str) \
+ do { \
+ const char *pos2 = os_strstr(pos, " " #str "="); \
+ if (pos2) { \
+ pos2 += sizeof(" " #str "=") - 1; \
+ freq_params.str = atoi(pos2); \
+ } \
+ } while (0)
+
+ SET_FREQ_SETTING(center_freq1);
+ SET_FREQ_SETTING(center_freq2);
+ SET_FREQ_SETTING(bandwidth);
+ SET_FREQ_SETTING(sec_channel_offset);
+#undef SET_FREQ_SETTING
+
+ freq_params.ht_enabled = !!os_strstr(pos, " ht");
+ freq_params.vht_enabled = !!os_strstr(pos, " vht");
+
+ if (hwaddr_aton(cmd, peer)) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL_IFACE TDLS_CHAN_SWITCH: Invalid address '%s'",
+ cmd);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE TDLS_CHAN_SWITCH " MACSTR
+ " OP CLASS %d FREQ %d CENTER1 %d CENTER2 %d BW %d SEC_OFFSET %d%s%s",
+ MAC2STR(peer), oper_class, freq_params.freq,
+ freq_params.center_freq1, freq_params.center_freq2,
+ freq_params.bandwidth, freq_params.sec_channel_offset,
+ freq_params.ht_enabled ? " HT" : "",
+ freq_params.vht_enabled ? " VHT" : "");
+
+ return wpa_tdls_enable_chan_switch(wpa_s->wpa, peer, oper_class,
+ &freq_params);
+}
+
+
+static int wpa_supplicant_ctrl_iface_tdls_cancel_chan_switch(
+ struct wpa_supplicant *wpa_s, char *cmd)
+{
+ u8 peer[ETH_ALEN];
+
+ if (!wpa_tdls_is_external_setup(wpa_s->wpa)) {
+ wpa_printf(MSG_INFO,
+ "tdls_chanswitch: Only supported with external setup");
+ return -1;
+ }
+
+ if (hwaddr_aton(cmd, peer)) {
+ wpa_printf(MSG_DEBUG,
+ "CTRL_IFACE TDLS_CANCEL_CHAN_SWITCH: Invalid address '%s'",
+ cmd);
+ return -1;
+ }
+
+ wpa_printf(MSG_DEBUG, "CTRL_IFACE TDLS_CANCEL_CHAN_SWITCH " MACSTR,
+ MAC2STR(peer));
+
+ return wpa_tdls_disable_chan_switch(wpa_s->wpa, peer);
+}
+
#endif /* CONFIG_TDLS */
} else if (os_strncmp(buf, "TDLS_TEARDOWN ", 14) == 0) {
if (wpa_supplicant_ctrl_iface_tdls_teardown(wpa_s, buf + 14))
reply_len = -1;
+ } else if (os_strncmp(buf, "TDLS_CHAN_SWITCH ", 17) == 0) {
+ if (wpa_supplicant_ctrl_iface_tdls_chan_switch(wpa_s,
+ buf + 17))
+ reply_len = -1;
+ } else if (os_strncmp(buf, "TDLS_CANCEL_CHAN_SWITCH ", 24) == 0) {
+ if (wpa_supplicant_ctrl_iface_tdls_cancel_chan_switch(wpa_s,
+ buf + 24))
+ reply_len = -1;
#endif /* CONFIG_TDLS */
} else if (os_strcmp(buf, "WMM_AC_STATUS") == 0) {
reply_len = wpas_wmm_ac_status(wpa_s, reply, reply_size);
return wpa_s->driver->del_tx_ts(wpa_s->drv_priv, tid, address);
}
+static inline int wpa_drv_tdls_enable_channel_switch(
+ struct wpa_supplicant *wpa_s, const u8 *addr, u8 oper_class,
+ const struct hostapd_freq_params *freq_params)
+{
+ if (!wpa_s->driver->tdls_enable_channel_switch)
+ return -1;
+ return wpa_s->driver->tdls_enable_channel_switch(wpa_s->drv_priv, addr,
+ oper_class,
+ freq_params);
+}
+
+static inline int
+wpa_drv_tdls_disable_channel_switch(struct wpa_supplicant *wpa_s,
+ const u8 *addr)
+{
+ if (!wpa_s->driver->tdls_disable_channel_switch)
+ return -1;
+ return wpa_s->driver->tdls_disable_channel_switch(wpa_s->drv_priv,
+ addr);
+}
+
static inline int wpa_drv_wnm_oper(struct wpa_supplicant *wpa_s,
enum wnm_oper oper, const u8 *peer,
u8 *buf, u16 *buf_len)
return wpa_drv_sta_add(wpa_s, ¶ms);
}
+
+static int wpa_supplicant_tdls_enable_channel_switch(
+ void *ctx, const u8 *addr, u8 oper_class,
+ const struct hostapd_freq_params *params)
+{
+ struct wpa_supplicant *wpa_s = ctx;
+
+ return wpa_drv_tdls_enable_channel_switch(wpa_s, addr, oper_class,
+ params);
+}
+
+
+static int wpa_supplicant_tdls_disable_channel_switch(void *ctx, const u8 *addr)
+{
+ struct wpa_supplicant *wpa_s = ctx;
+
+ return wpa_drv_tdls_disable_channel_switch(wpa_s, addr);
+}
+
#endif /* CONFIG_TDLS */
#endif /* CONFIG_NO_WPA */
ctx->send_tdls_mgmt = wpa_supplicant_send_tdls_mgmt;
ctx->tdls_oper = wpa_supplicant_tdls_oper;
ctx->tdls_peer_addset = wpa_supplicant_tdls_peer_addset;
+ ctx->tdls_enable_channel_switch =
+ wpa_supplicant_tdls_enable_channel_switch;
+ ctx->tdls_disable_channel_switch =
+ wpa_supplicant_tdls_disable_channel_switch;
#endif /* CONFIG_TDLS */
ctx->set_rekey_offload = wpa_supplicant_set_rekey_offload;
ctx->key_mgmt_set_pmk = wpa_supplicant_key_mgmt_set_pmk;