static void fst_session_handle_tear_down(struct fst_session *s,
struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
const struct fst_tear_down *td;
size_t plen = frame_len - IEEE80211_HDRLEN - 1;
union fst_session_state_switch_extra evext = {
.to_initial = {
.reason = REASON_TEARDOWN,
.initiator = FST_INITIATOR_REMOTE,
},
};
if (plen < sizeof(*td)) {
fst_printf_session(s, MSG_WARNING,
"Too short FST Tear Down dropped");
return;
}
td = (const struct fst_tear_down *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (le_to_host32(td->fsts_id) != s->data.fsts_id) {
fst_printf_siface(s, iface, MSG_WARNING,
"tear down for wrong FST Setup ID (%u)",
le_to_host32(td->fsts_id));
return;
}
fst_session_stt_disarm(s);
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
}
static void
fst_session_handle_ack_response(struct fst_session *s,
struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
const struct fst_ack_res *res;
size_t plen = frame_len - IEEE80211_HDRLEN - 1;
union fst_session_state_switch_extra evext = {
.to_initial = {
.reason = REASON_SWITCH,
.initiator = FST_INITIATOR_LOCAL,
},
};
if (!fst_session_is_switch_requested(s)) {
fst_printf_siface(s, iface, MSG_ERROR,
"Ack Response in inappropriate session state (%s)",
fst_session_state_name(s->state));
return;
}
WPA_ASSERT(s->data.new_iface != NULL);
if (iface != s->data.new_iface) {
fst_printf_siface(s, iface, MSG_ERROR,
"Ack response received on wrong interface");
return;
}
if (plen < sizeof(*res)) {
fst_printf_session(s, MSG_WARNING,
"Too short FST Ack Response dropped");
return;
}
res = (const struct fst_ack_res *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (le_to_host32(res->fsts_id) != s->data.fsts_id) {
fst_printf_siface(s, iface, MSG_ERROR,
"Ack response for wrong FST Setup ID (%u)",
le_to_host32(res->fsts_id));
return;
}
fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_CONFIRMED, NULL);
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
fst_session_stt_disarm(s);
}
static int hostapd_ctrl_iface_sta_mib(struct hostapd_data *hapd,
struct sta_info *sta,
char *buf, size_t buflen)
{
int len, res, ret, i;
const char *keyid;
if (!sta)
return 0;
len = 0;
ret = os_snprintf(buf + len, buflen - len, MACSTR "\nflags=",
MAC2STR(sta->addr));
if (os_snprintf_error(buflen - len, ret))
return len;
len += ret;
ret = ap_sta_flags_txt(sta->flags, buf + len, buflen - len);
if (ret < 0)
return len;
len += ret;
ret = os_snprintf(buf + len, buflen - len, "\naid=%d\ncapability=0x%x\n"
"listen_interval=%d\nsupported_rates=",
sta->aid, sta->capability, sta->listen_interval);
if (os_snprintf_error(buflen - len, ret))
return len;
len += ret;
for (i = 0; i < sta->supported_rates_len; i++) {
ret = os_snprintf(buf + len, buflen - len, "%02x%s",
sta->supported_rates[i],
i + 1 < sta->supported_rates_len ? " " : "");
if (os_snprintf_error(buflen - len, ret))
return len;
len += ret;
}
ret = os_snprintf(buf + len, buflen - len, "\ntimeout_next=%s\n",
timeout_next_str(sta->timeout_next));
if (os_snprintf_error(buflen - len, ret))
return len;
len += ret;
res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
if (res >= 0)
len += res;
res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
if (res >= 0)
len += res;
res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
if (res >= 0)
len += res;
res = hostapd_wps_get_mib_sta(hapd, sta->addr, buf + len,
buflen - len);
if (res >= 0)
len += res;
res = hostapd_p2p_get_mib_sta(hapd, sta, buf + len, buflen - len);
if (res >= 0)
len += res;
len += hostapd_get_sta_tx_rx(hapd, sta, buf + len, buflen - len);
len += hostapd_get_sta_conn_time(sta, buf + len, buflen - len);
#ifdef CONFIG_SAE
if (sta->sae && sta->sae->state == SAE_ACCEPTED) {
res = os_snprintf(buf + len, buflen - len, "sae_group=%d\n",
sta->sae->group);
if (!os_snprintf_error(buflen - len, res))
len += res;
}
#endif /* CONFIG_SAE */
if (sta->vlan_id > 0) {
res = os_snprintf(buf + len, buflen - len, "vlan_id=%d\n",
sta->vlan_id);
if (!os_snprintf_error(buflen - len, res))
len += res;
}
res = mbo_ap_get_info(sta, buf + len, buflen - len);
if (res >= 0)
len += res;
if (sta->supp_op_classes &&
buflen - len > (unsigned) (17 + 2 * sta->supp_op_classes[0])) {
len += os_snprintf(buf + len, buflen - len, "supp_op_classes=");
len += wpa_snprintf_hex(buf + len, buflen - len,
sta->supp_op_classes + 1,
sta->supp_op_classes[0]);
len += os_snprintf(buf + len, buflen - len, "\n");
}
if (sta->power_capab) {
ret = os_snprintf(buf + len, buflen - len,
"min_txpower=%d\n"
"max_txpower=%d\n",
sta->min_tx_power, sta->max_tx_power);
if (!os_snprintf_error(buflen - len, ret))
len += ret;
}
#ifdef CONFIG_IEEE80211AC
if ((sta->flags & WLAN_STA_VHT) && sta->vht_capabilities) {
res = os_snprintf(buf + len, buflen - len,
"vht_caps_info=0x%08x\n",
le_to_host32(sta->vht_capabilities->
vht_capabilities_info));
if (!os_snprintf_error(buflen - len, res))
len += res;
}
#endif /* CONFIG_IEEE80211AC */
#ifdef CONFIG_IEEE80211N
if ((sta->flags & WLAN_STA_HT) && sta->ht_capabilities) {
res = os_snprintf(buf + len, buflen - len,
"ht_caps_info=0x%04x\n",
le_to_host16(sta->ht_capabilities->
ht_capabilities_info));
if (!os_snprintf_error(buflen - len, res))
len += res;
}
#endif /* CONFIG_IEEE80211N */
if (sta->ext_capability &&
buflen - len > (unsigned) (11 + 2 * sta->ext_capability[0])) {
len += os_snprintf(buf + len, buflen - len, "ext_capab=");
len += wpa_snprintf_hex(buf + len, buflen - len,
sta->ext_capability + 1,
sta->ext_capability[0]);
len += os_snprintf(buf + len, buflen - len, "\n");
}
if (sta->flags & WLAN_STA_WDS && sta->ifname_wds) {
ret = os_snprintf(buf + len, buflen - len,
"wds_sta_ifname=%s\n", sta->ifname_wds);
if (!os_snprintf_error(buflen - len, ret))
len += ret;
}
keyid = ap_sta_wpa_get_keyid(hapd, sta);
if (keyid) {
ret = os_snprintf(buf + len, buflen - len, "keyid=%s\n", keyid);
if (!os_snprintf_error(buflen - len, ret))
len += ret;
}
return len;
}
static void fst_session_handle_ack_request(struct fst_session *s,
struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
const struct fst_ack_req *req;
size_t plen = frame_len - IEEE80211_HDRLEN - 1;
struct fst_ack_res res;
union fst_session_state_switch_extra evext = {
.to_initial = {
.reason = REASON_SWITCH,
.initiator = FST_INITIATOR_REMOTE,
},
};
if (!fst_session_is_ready(s) && !fst_session_is_switch_requested(s)) {
fst_printf_siface(s, iface, MSG_ERROR,
"cannot initiate switch due to wrong session state (%s)",
fst_session_state_name(s->state));
return;
}
WPA_ASSERT(s->data.new_iface != NULL);
if (iface != s->data.new_iface) {
fst_printf_siface(s, iface, MSG_ERROR,
"Ack received on wrong interface");
return;
}
if (plen < sizeof(*req)) {
fst_printf_session(s, MSG_WARNING,
"Too short FST Ack Request dropped");
return;
}
req = (const struct fst_ack_req *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (le_to_host32(req->fsts_id) != s->data.fsts_id) {
fst_printf_siface(s, iface, MSG_WARNING,
"Ack for wrong FST Setup ID (%u)",
le_to_host32(req->fsts_id));
return;
}
os_memset(&res, 0, sizeof(res));
res.action = FST_ACTION_ACK_RESPONSE;
res.dialog_token = req->dialog_token;
res.fsts_id = req->fsts_id;
if (!fst_session_send_action(s, FALSE, &res, sizeof(res), NULL)) {
fst_printf_sframe(s, FALSE, MSG_INFO, "FST Ack Response sent");
fst_session_stt_disarm(s);
fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_DONE,
NULL);
fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_CONFIRMED,
NULL);
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
}
}
static void fst_session_handle_setup_response(struct fst_session *s,
struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
const struct fst_setup_res *res;
size_t plen = frame_len - IEEE80211_HDRLEN - 1;
enum hostapd_hw_mode hw_mode;
u8 channel;
union fst_session_state_switch_extra evext = {
.to_initial = {0},
};
if (iface != s->data.old_iface) {
fst_printf_session(s, MSG_WARNING,
"FST Response dropped: %s is not the old iface",
fst_iface_get_name(iface));
return;
}
if (!fst_session_is_ready_pending(s)) {
fst_printf_session(s, MSG_WARNING,
"FST Response dropped due to wrong state: %s",
fst_session_state_name(s->state));
return;
}
if (plen < sizeof(*res)) {
fst_printf_session(s, MSG_WARNING,
"Too short FST Response dropped");
return;
}
res = (const struct fst_setup_res *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (res->stie.element_id != WLAN_EID_SESSION_TRANSITION ||
res->stie.length < 11) {
fst_printf_iface(iface, MSG_WARNING,
"FST Response dropped: invalid STIE");
return;
}
if (res->dialog_token != s->data.pending_setup_req_dlgt) {
fst_printf_session(s, MSG_WARNING,
"FST Response dropped due to wrong dialog token (%u != %u)",
s->data.pending_setup_req_dlgt,
res->dialog_token);
return;
}
if (res->status_code == WLAN_STATUS_SUCCESS &&
le_to_host32(res->stie.fsts_id) != s->data.fsts_id) {
fst_printf_session(s, MSG_WARNING,
"FST Response dropped due to wrong FST Session ID (%u)",
le_to_host32(res->stie.fsts_id));
return;
}
fst_session_stt_disarm(s);
if (res->status_code != WLAN_STATUS_SUCCESS) {
/*
* 10.32.2.2 Transitioning between states
* The initiator shall set the STT to the value of the
* FSTSessionTimeOut field at ... and at each ACK frame sent in
* response to a received FST Setup Response with the Status
* Code field equal to PENDING_ADMITTING_FST_SESSION or
* PENDING_GAP_IN_BA_WINDOW.
*/
evext.to_initial.reason = REASON_REJECT;
evext.to_initial.reject_code = res->status_code;
evext.to_initial.initiator = FST_INITIATOR_REMOTE;
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
fst_printf_session(s, MSG_WARNING,
"FST Setup rejected by remote side with status %u",
res->status_code);
return;
}
fst_iface_get_channel_info(s->data.new_iface, &hw_mode, &channel);
if (fst_hw_mode_to_band(hw_mode) != res->stie.new_band_id) {
evext.to_initial.reason = REASON_ERROR_PARAMS;
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
fst_printf_session(s, MSG_WARNING,
"invalid FST Setup parameters");
fst_session_tear_down_setup(s);
return;
}
fst_printf_session(s, MSG_INFO,
"%s: FST Setup established for %s (llt=%u)",
fst_iface_get_name(s->data.old_iface),
fst_iface_get_name(s->data.new_iface),
s->data.llt_ms);
fst_session_notify_ctrl(s, EVENT_FST_ESTABLISHED, NULL);
if (s->data.llt_ms == FST_LLT_SWITCH_IMMEDIATELY)
fst_session_initiate_switch(s);
}
static void fst_session_handle_setup_request(struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
struct fst_session *s;
const struct fst_setup_req *req;
struct fst_iface *new_iface = NULL;
struct fst_group *g;
u8 new_iface_peer_addr[ETH_ALEN];
const struct wpabuf *peer_mbies;
size_t plen;
if (frame_len < IEEE80211_HDRLEN + 1 + sizeof(*req)) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: too short (%zu < %zu)",
frame_len,
IEEE80211_HDRLEN + 1 + sizeof(*req));
return;
}
plen = frame_len - IEEE80211_HDRLEN - 1;
req = (const struct fst_setup_req *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (req->stie.element_id != WLAN_EID_SESSION_TRANSITION ||
req->stie.length < 11) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: invalid STIE");
return;
}
if (req->stie.new_band_id == req->stie.old_band_id) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: new and old band IDs are the same");
return;
}
g = fst_iface_get_group(iface);
if (plen > sizeof(*req)) {
fst_iface_update_mb_ie(iface, mgmt->sa, (const u8 *) (req + 1),
plen - sizeof(*req));
fst_printf_iface(iface, MSG_INFO,
"FST Request: MB IEs updated for " MACSTR,
MAC2STR(mgmt->sa));
}
peer_mbies = fst_iface_get_peer_mb_ie(iface, mgmt->sa);
if (peer_mbies) {
new_iface = fst_group_get_new_iface_by_stie_and_mbie(
g, wpabuf_head(peer_mbies), wpabuf_len(peer_mbies),
&req->stie, new_iface_peer_addr);
if (new_iface)
fst_printf_iface(iface, MSG_INFO,
"FST Request: new iface (%s:" MACSTR
") found by MB IEs",
fst_iface_get_name(new_iface),
MAC2STR(new_iface_peer_addr));
}
if (!new_iface) {
new_iface = fst_group_find_new_iface_by_stie(
g, iface, mgmt->sa, &req->stie,
new_iface_peer_addr);
if (new_iface)
fst_printf_iface(iface, MSG_INFO,
"FST Request: new iface (%s:" MACSTR
") found by others",
fst_iface_get_name(new_iface),
MAC2STR(new_iface_peer_addr));
}
if (!new_iface) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: new iface not found");
return;
}
s = fst_find_session_in_progress(mgmt->sa, g);
if (s) {
union fst_session_state_switch_extra evext = {
.to_initial = {
.reason = REASON_SETUP,
},
};
/*
* 10.32.2.2 Transitioning between states:
* Upon receipt of an FST Setup Request frame, the responder
* shall respond with an FST Setup Response frame unless it has
* a pending FST Setup Request frame addressed to the initiator
* and the responder has a numerically larger MAC address than
* the initiator’s MAC address, in which case, the responder
* shall delete the received FST Setup Request.
*/
if (os_memcmp(mgmt->da, mgmt->sa, ETH_ALEN) > 0) {
fst_printf_session(s, MSG_WARNING,
"FST Request dropped due to MAC comparison (our MAC is "
MACSTR ")",
MAC2STR(mgmt->da));
return;
}
if (!fst_session_is_ready_pending(s)) {
fst_printf_session(s, MSG_WARNING,
"FST Request from " MACSTR
" dropped due to inappropriate state %s",
MAC2STR(mgmt->da),
fst_session_state_name(s->state));
return;
}
/*
* If FST Setup Request arrived with the same FSTS ID as one we
* initialized before, it means the other side either didn't
* receive our FST Request or skipped it for some reason (for
* example, due to numerical MAC comparison).
*
* In this case, there's no need to tear down the session.
* Moreover, as FSTS ID is the same, the other side will
* associate this tear down with the session it initiated that
* will break the sync.
*/
if (le_to_host32(req->stie.fsts_id) != s->data.fsts_id)
fst_session_send_tear_down(s);
else
fst_printf_session(s, MSG_WARNING,
"Skipping TearDown as the FST request has the same FSTS ID as initiated");
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
fst_session_stt_disarm(s);
fst_printf_session(s, MSG_WARNING, "reset due to FST request");
}
s = fst_session_create(g);
if (!s) {
fst_printf(MSG_WARNING,
"FST Request dropped: cannot create session for %s and %s",
fst_iface_get_name(iface),
fst_iface_get_name(new_iface));
return;
}
fst_session_set_iface(s, iface, TRUE);
fst_session_set_peer_addr(s, mgmt->sa, TRUE);
fst_session_set_iface(s, new_iface, FALSE);
fst_session_set_peer_addr(s, new_iface_peer_addr, FALSE);
fst_session_set_llt(s, FST_LLT_VAL_TO_MS(le_to_host32(req->llt)));
s->data.pending_setup_req_dlgt = req->dialog_token;
s->data.fsts_id = le_to_host32(req->stie.fsts_id);
fst_session_stt_arm(s);
fst_session_notify_ctrl(s, EVENT_FST_SETUP, NULL);
fst_session_set_state(s, FST_SESSION_STATE_SETUP_COMPLETION, NULL);
}
static void fst_session_handle_setup_request(struct fst_iface *iface,
const struct ieee80211_mgmt *mgmt,
size_t frame_len)
{
struct fst_session *s;
const struct fst_setup_req *req;
struct fst_iface *new_iface = NULL;
struct fst_group *g;
u8 new_iface_peer_addr[ETH_ALEN];
size_t plen;
if (frame_len < IEEE80211_HDRLEN + 1 + sizeof(*req)) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: too short (%zu < %zu)",
frame_len,
IEEE80211_HDRLEN + 1 + sizeof(*req));
return;
}
plen = frame_len - IEEE80211_HDRLEN - 1;
req = (const struct fst_setup_req *)
(((const u8 *) mgmt) + IEEE80211_HDRLEN + 1);
if (req->stie.element_id != WLAN_EID_SESSION_TRANSITION ||
req->stie.length < 11) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: invalid STIE");
return;
}
if (req->stie.new_band_id == req->stie.old_band_id) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: new and old band IDs are the same");
return;
}
g = fst_iface_get_group(iface);
if (plen > sizeof(*req)) {
fst_iface_update_mb_ie(iface, mgmt->sa, (const u8 *) (req + 1),
plen - sizeof(*req));
fst_printf_iface(iface, MSG_INFO,
"FST Request: MB IEs updated for " MACSTR,
MAC2STR(mgmt->sa));
}
new_iface = fst_group_get_peer_other_connection(iface, mgmt->sa,
req->stie.new_band_id,
new_iface_peer_addr);
if (!new_iface) {
fst_printf_iface(iface, MSG_WARNING,
"FST Request dropped: new iface not found");
return;
}
fst_printf_iface(iface, MSG_INFO,
"FST Request: new iface (%s:" MACSTR ") found",
fst_iface_get_name(new_iface),
MAC2STR(new_iface_peer_addr));
s = fst_find_session_in_progress(mgmt->sa, g);
if (s) {
union fst_session_state_switch_extra evext = {
.to_initial = {
.reason = REASON_SETUP,
},
};
/*
* 10.32.2.2 Transitioning between states:
* Upon receipt of an FST Setup Request frame, the responder
* shall respond with an FST Setup Response frame unless it has
* a pending FST Setup Request frame addressed to the initiator
* and the responder has a numerically larger MAC address than
* the initiator’s MAC address, in which case, the responder
* shall delete the received FST Setup Request.
*/
if (fst_session_is_ready_pending(s) &&
/* waiting for Setup Response */
os_memcmp(mgmt->da, mgmt->sa, ETH_ALEN) > 0) {
fst_printf_session(s, MSG_WARNING,
"FST Request dropped due to MAC comparison (our MAC is "
MACSTR ")",
MAC2STR(mgmt->da));
return;
}
/*
* State is SETUP_COMPLETION (either in transition or not) or
* TRANSITION_DONE (in transition).
* Setup Request arriving in this state could mean:
* 1. peer sent it before receiving our Setup Request (race
* condition)
* 2. peer didn't receive our Setup Response. Peer is retrying
* after STT timeout
* 3. peer's FST state machines are out of sync due to some
* other reason
*
* We will reset our session and create a new one instead.
*/
fst_printf_session(s, MSG_WARNING,
"resetting due to FST request");
/*
* If FST Setup Request arrived with the same FSTS ID as one we
* initialized before, there's no need to tear down the session.
* Moreover, as FSTS ID is the same, the other side will
* associate this tear down with the session it initiated that
* will break the sync.
*/
if (le_to_host32(req->stie.fsts_id) != s->data.fsts_id)
fst_session_send_tear_down(s);
else
fst_printf_session(s, MSG_WARNING,
"Skipping TearDown as the FST request has the same FSTS ID as initiated");
fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext);
fst_session_stt_disarm(s);
}
s = fst_session_create(g);
if (!s) {
fst_printf(MSG_WARNING,
"FST Request dropped: cannot create session for %s and %s",
fst_iface_get_name(iface),
fst_iface_get_name(new_iface));
return;
}
fst_session_set_iface(s, iface, TRUE);
fst_session_set_peer_addr(s, mgmt->sa, TRUE);
fst_session_set_iface(s, new_iface, FALSE);
fst_session_set_peer_addr(s, new_iface_peer_addr, FALSE);
fst_session_set_llt(s, FST_LLT_VAL_TO_MS(le_to_host32(req->llt)));
s->data.pending_setup_req_dlgt = req->dialog_token;
s->data.fsts_id = le_to_host32(req->stie.fsts_id);
fst_session_stt_arm(s);
fst_session_notify_ctrl(s, EVENT_FST_SETUP, NULL);
fst_session_set_state(s, FST_SESSION_STATE_SETUP_COMPLETION, NULL);
}