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Pass TDLS peer capability information in tdls_mgmt

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While framing the TDLS Setup Confirmation frame, the driver needs to
know if the TDLS peer is VHT/HT/WMM capable and thus shall construct the
VHT/HT operation / WMM parameter elements accordingly. Supplicant
determines if the TDLS peer is VHT/HT/WMM capable based on the presence
of the respective IEs in the received TDLS Setup Response frame.

The host driver should not need to parse the received TDLS Response
frame and thus, should be able to rely on the supplicant to indicate
the capability of the peer through additional flags while transmitting
the TDLS Setup Confirmation frame through tdls_mgmt operations.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Sunil Dutt 2014-03-26 21:34:50 +05:30 • committed by Jouni Malinen
parent 78cd7e69de
commit 96ecea5eb1
7 changed files with 60 additions and 22 deletions
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40
src/rsn_supp/tdls.c
View file

@ -118,6 +118,7 @@ struct wpa_tdls_peer {
u8 action_code; /* TDLS frame type */
u8 dialog_token;
u16 status_code;
u32 peer_capab;
int buf_len; /* length of TPK message for retransmission */
u8 *buf; /* buffer for TPK message */
} sm_tmr;
@ -142,6 +143,8 @@ struct wpa_tdls_peer {
u8 *supp_oper_classes;
size_t supp_oper_classes_len;
u8 wmm_capable;
};
@ -211,15 +214,16 @@ static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
u8 action_code, u8 dialog_token,
u16 status_code, const u8 *buf, size_t len)
u16 status_code, u32 peer_capab,
const u8 *buf, size_t len)
{
return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
status_code, buf, len);
status_code, peer_capab, buf, len);
}
static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
u8 dialog_token, u16 status_code,
u8 dialog_token, u16 status_code, u32 peer_capab,
const u8 *msg, size_t msg_len)
{
struct wpa_tdls_peer *peer;
@ -230,7 +234,7 @@ static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
(unsigned int) msg_len);
if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
status_code, msg, msg_len)) {
status_code, peer_capab, msg, msg_len)) {
wpa_printf(MSG_INFO, "TDLS: Failed to send message "
"(action_code=%u)", action_code);
return -1;
@ -268,6 +272,7 @@ static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
peer->sm_tmr.action_code = action_code;
peer->sm_tmr.dialog_token = dialog_token;
peer->sm_tmr.status_code = status_code;
peer->sm_tmr.peer_capab = peer_capab;
peer->sm_tmr.buf_len = msg_len;
os_free(peer->sm_tmr.buf);
peer->sm_tmr.buf = os_malloc(msg_len);
@ -324,6 +329,7 @@ static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
peer->sm_tmr.action_code,
peer->sm_tmr.dialog_token,
peer->sm_tmr.status_code,
peer->sm_tmr.peer_capab,
peer->sm_tmr.buf,
peer->sm_tmr.buf_len)) {
wpa_printf(MSG_INFO, "TDLS: Failed to retry "
@ -645,6 +651,8 @@ static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
peer->supp_oper_classes = NULL;
peer->rsnie_i_len = peer->rsnie_p_len = 0;
peer->cipher = 0;
peer->qos_info = 0;
peer->wmm_capable = 0;
peer->tpk_set = peer->tpk_success = 0;
os_memset(&peer->tpk, 0, sizeof(peer->tpk));
os_memset(peer->inonce, 0, WPA_NONCE_LEN);
@ -747,7 +755,7 @@ skip_ies:
/* request driver to send Teardown using this FTIE */
wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
reason_code, rbuf, pos - rbuf);
reason_code, 0, rbuf, pos - rbuf);
os_free(rbuf);
/* clear the Peerkey statemachine */
@ -918,7 +926,7 @@ static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
" (action=%u status=%u)",
MAC2STR(dst), tdls_action, status);
return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
NULL, 0);
0, NULL, 0);
}
@ -1124,7 +1132,7 @@ skip_ies:
MAC2STR(peer->addr));
status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST,
1, 0, rbuf, pos - rbuf);
1, 0, 0, rbuf, pos - rbuf);
os_free(rbuf);
return status;
@ -1208,7 +1216,7 @@ static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm,
skip_ies:
status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
dtoken, 0, rbuf, pos - rbuf);
dtoken, 0, 0, rbuf, pos - rbuf);
os_free(rbuf);
return status;
@ -1226,6 +1234,7 @@ static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm,
struct wpa_tdls_timeoutie timeoutie;
u32 lifetime;
int status;
u32 peer_capab = 0;
buf_len = 0;
if (wpa_tdls_get_privacy(sm)) {
@ -1288,9 +1297,16 @@ static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm,
wpa_tdls_ftie_mic(peer->tpk.kck, 3, (u8 *) lnkid, peer->rsnie_p,
(u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
if (peer->vht_capabilities)
peer_capab |= TDLS_PEER_VHT;
else if (peer->ht_capabilities)
peer_capab |= TDLS_PEER_HT;
else if (peer->wmm_capable)
peer_capab |= TDLS_PEER_WMM;
skip_ies:
status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
dtoken, 0, rbuf, pos - rbuf);
dtoken, 0, peer_capab, rbuf, pos - rbuf);
os_free(rbuf);
return status;
@ -1305,7 +1321,7 @@ static int wpa_tdls_send_discovery_response(struct wpa_sm *sm,
"(peer " MACSTR ")", MAC2STR(peer->addr));
return wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
dialog_token, 0, NULL, 0);
dialog_token, 0, 0, NULL, 0);
}
@ -1366,7 +1382,7 @@ int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
MACSTR, MAC2STR(addr));
return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
1, 0, NULL, 0);
1, 0, 0, NULL, 0);
}
@ -1484,6 +1500,8 @@ static int copy_peer_wmm_capab(const struct wpa_eapol_ie_parse *kde,
wmm = (struct wmm_information_element *) kde->wmm;
peer->qos_info = wmm->qos_info;
peer->wmm_capable = 1;
wpa_printf(MSG_DEBUG, "TDLS: Peer WMM QOS Info 0x%x", peer->qos_info);
return 0;
}