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TDLS: Support sending a teardown frame from usermode

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When a driver does not implement the TDLS_TEARDOWN operation internally,
send an explicit TDLS link teardown frame to the driver.

Change all teardown calls to use these calling semantics.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Cc: Kalyan C Gaddam <chakkal@iit.edu>
This commit is contained in:
Arik Nemtsov 2011-09-26 13:55:28 +03:00 committed by Jouni Malinen
parent 35287637cc
commit 7de27409a2
3 changed files with 58 additions and 15 deletions
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64
src/rsn_supp/tdls.c
View file

@ -255,6 +255,26 @@ static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
}
static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
u16 reason_code)
{
int ret;
if (sm->tdls_external_setup) {
ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code);
/* disable the link after teardown was sent */
wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
} else {
ret = wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
}
wpa_tdls_peer_free(sm, peer);
return ret;
}
static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
{
@ -293,15 +313,11 @@ static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
wpa_tdls_tpk_retry_timeout, sm, peer);
} else {
wpa_printf(MSG_INFO, "Sending Tear_Down Request");
wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
wpa_printf(MSG_INFO, "Clearing SM: Peerkey(" MACSTR ")",
MAC2STR(peer->addr));
eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
/* clear the Peerkey statemachine */
wpa_tdls_peer_free(sm, peer);
wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request");
wpa_tdls_do_teardown(sm, peer,
WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
}
}
@ -578,7 +594,8 @@ static void wpa_tdls_tpk_timeout(void *eloop_ctx, void *timeout_ctx)
} else {
wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
" - tear down", MAC2STR(peer->addr));
wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
wpa_tdls_do_teardown(sm, peer,
WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
}
}
@ -617,8 +634,7 @@ static void wpa_tdls_linkid(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
}
int wpa_tdls_recv_teardown_notify(struct wpa_sm *sm, const u8 *addr,
u16 reason_code)
int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
{
struct wpa_tdls_peer *peer;
struct wpa_tdls_ftie *ftie;
@ -707,6 +723,34 @@ skip_ies:
}
int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
{
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 == NULL) {
wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR
" for link Teardown", MAC2STR(addr));
return -1;
}
if (!peer->tpk_success) {
wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
" not connected - cannot Teardown link", MAC2STR(addr));
return -1;
}
return wpa_tdls_do_teardown(sm, peer, reason_code);
}
static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr,
const u8 *buf, size_t len)
{

4
src/rsn_supp/wpa.h
View file

@ -360,8 +360,8 @@ void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len);
void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len);
int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_reneg(struct wpa_sm *sm, const u8 *addr);
int wpa_tdls_recv_teardown_notify(struct wpa_sm *sm, const u8 *addr,
u16 reason_code);
int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, u16 reason_code);
int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code);
int wpa_tdls_init(struct wpa_sm *sm);
void wpa_tdls_deinit(struct wpa_sm *sm);
void wpa_tdls_enable(struct wpa_sm *sm, int enabled);

3
wpa_supplicant/events.c
View file

@ -1755,8 +1755,7 @@ static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
break;
case TDLS_REQUEST_TEARDOWN:
/* request from driver to add FTIE */
wpa_tdls_recv_teardown_notify(wpa_s->wpa, data->tdls.peer,
wpa_tdls_send_teardown(wpa_s->wpa, data->tdls.peer,
data->tdls.reason_code);
break;
}