* Received Data frame processing for TDLS packets
* Copyright (c) 2010, Jouni Malinen <j@w1.fi>
*
- * 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
#include "wlantest.h"
-static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *linkid)
+static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *linkid,
+ int create_new, const u8 *bssid)
{
struct wlantest_bss *bss;
struct wlantest_sta *init, *resp;
struct wlantest_tdls *tdls;
bss = bss_find(wt, linkid);
+ if (bss == NULL && bssid) {
+ bss = bss_find(wt, bssid);
+ if (bss)
+ add_note(wt, MSG_INFO, "TDLS: Incorrect BSSID " MACSTR
+ " in LinkId?! (init=" MACSTR " resp="
+ MACSTR ")",
+ MAC2STR(linkid), MAC2STR(linkid + ETH_ALEN),
+ MAC2STR(linkid + 2 * ETH_ALEN));
+ }
if (bss == NULL)
return NULL;
return tdls;
}
+ if (!create_new)
+ return NULL;
+
+ add_note(wt, MSG_DEBUG, "Add new TDLS link context: initiator " MACSTR
+ " responder " MACSTR " BSSID " MACSTR,
+ MAC2STR(linkid + ETH_ALEN),
+ MAC2STR(linkid + 2 * ETH_ALEN),
+ MAC2STR(bssid));
+
tdls = os_zalloc(sizeof(*tdls));
if (tdls == NULL)
return NULL;
}
-static int tdls_verify_mic(struct wlantest_tdls *tdls, u8 trans_seq,
- struct ieee802_11_elems *elems)
+static int tdls_verify_mic(struct wlantest *wt, struct wlantest_tdls *tdls,
+ u8 trans_seq, struct ieee802_11_elems *elems)
{
u8 *buf, *pos;
int len;
struct rsn_ftie *tmp_ftie;
if (elems->link_id == NULL || elems->rsn_ie == NULL ||
- elems->timeout_int == NULL || elems->ftie == NULL)
+ elems->timeout_int == NULL || elems->ftie == NULL ||
+ elems->ftie_len < sizeof(struct rsn_ftie))
return -1;
len = 2 * ETH_ALEN + 1 + 2 + 18 + 2 + elems->rsn_ie_len +
- 2 + elems->timeout_int_len + 2 + elems->ftie_len;
+ 2 + 5 + 2 + elems->ftie_len;
buf = os_zalloc(len);
if (buf == NULL)
os_memcpy(pos, elems->rsn_ie - 2, 2 + elems->rsn_ie_len);
pos += 2 + elems->rsn_ie_len;
/* 6) Timeout Interval IE */
- os_memcpy(pos, elems->timeout_int - 2, 2 + elems->timeout_int_len);
- pos += 2 + elems->timeout_int_len;
+ os_memcpy(pos, elems->timeout_int - 2, 2 + 5);
+ pos += 2 + 5;
/* 7) FTIE, with the MIC field of the FTIE set to 0 */
os_memcpy(pos, elems->ftie - 2, 2 + elems->ftie_len);
pos += 2;
rx_ftie = (const struct rsn_ftie *) elems->ftie;
if (os_memcmp(mic, rx_ftie->mic, 16) == 0) {
- wpa_printf(MSG_DEBUG, "TDLS: Valid MIC");
+ add_note(wt, MSG_DEBUG, "TDLS: Valid MIC");
return 0;
}
- wpa_printf(MSG_DEBUG, "TDLS: Invalid MIC");
+ add_note(wt, MSG_DEBUG, "TDLS: Invalid MIC");
return -1;
}
const u8 *data, size_t len)
{
struct ieee802_11_elems elems;
+ struct wlantest_tdls *tdls;
+ u8 linkid[3 * ETH_ALEN];
- if (len < 3)
+ if (len < 3) {
+ add_note(wt, MSG_INFO, "Too short TDLS Setup Request " MACSTR
+ " -> " MACSTR, MAC2STR(src), MAC2STR(dst));
return;
+ }
wpa_printf(MSG_DEBUG, "TDLS Setup Request " MACSTR " -> "
MACSTR, MAC2STR(src), MAC2STR(dst));
" initiator STA " MACSTR " responder STA " MACSTR,
MAC2STR(elems.link_id), MAC2STR(elems.link_id + ETH_ALEN),
MAC2STR(elems.link_id + 2 * ETH_ALEN));
+ tdls = get_tdls(wt, elems.link_id, 1, bssid);
+ if (tdls) {
+ tdls->counters[WLANTEST_TDLS_COUNTER_SETUP_REQ]++;
+ tdls->dialog_token = data[0];
+ if (elems.ftie && elems.ftie_len >= sizeof(struct rsn_ftie)) {
+ const struct rsn_ftie *f;
+ f = (const struct rsn_ftie *) elems.ftie;
+ os_memcpy(tdls->inonce, f->snonce, WPA_NONCE_LEN);
+ }
+ }
+
+ /* Check whether reverse direction context exists already */
+ os_memcpy(linkid, bssid, ETH_ALEN);
+ os_memcpy(linkid + ETH_ALEN, dst, ETH_ALEN);
+ os_memcpy(linkid + 2 * ETH_ALEN, src, ETH_ALEN);
+ tdls = get_tdls(wt, linkid, 0, bssid);
+ if (tdls)
+ add_note(wt, MSG_INFO, "Reverse direction TDLS context exists");
+}
+
+
+static void rx_data_tdls_setup_response_failure(struct wlantest *wt,
+ const u8 *bssid,
+ const u8 *sta_addr,
+ u8 dialog_token, u16 status)
+{
+ struct wlantest_bss *bss;
+ struct wlantest_tdls *tdls;
+ struct wlantest_sta *sta;
+
+ if (status == WLAN_STATUS_SUCCESS) {
+ add_note(wt, MSG_INFO, "TDLS: Invalid TDLS Setup Response from "
+ MACSTR, MAC2STR(sta_addr));
+ return;
+ }
+
+ bss = bss_find(wt, bssid);
+ if (!bss)
+ return;
+ sta = sta_find(bss, sta_addr);
+ if (!sta)
+ return;
+
+ dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
+ if (tdls->resp == sta) {
+ if (dialog_token != tdls->dialog_token) {
+ add_note(wt, MSG_DEBUG, "TDLS: Dialog token "
+ "mismatch in TDLS Setup Response "
+ "(failure)");
+ break;
+ }
+ add_note(wt, MSG_DEBUG, "TDLS: Found matching TDLS "
+ "setup session based on dialog token");
+ tdls->counters[
+ WLANTEST_TDLS_COUNTER_SETUP_RESP_FAIL]++;
+ break;
+ }
+ }
}
struct ieee802_11_elems elems;
struct wlantest_tdls *tdls;
- if (len < 5)
+ if (len < 3) {
+ add_note(wt, MSG_INFO, "Too short TDLS Setup Response " MACSTR
+ " -> " MACSTR, MAC2STR(src), MAC2STR(dst));
return;
+ }
status = WPA_GET_LE16(data);
wpa_printf(MSG_DEBUG, "TDLS Setup Response " MACSTR " -> "
MACSTR " (status %d)",
MAC2STR(src), MAC2STR(dst), status);
- if (status != WLAN_STATUS_SUCCESS)
+ if (len < 5 && status == 0) {
+ add_note(wt, MSG_INFO, "Too short TDLS Setup Response " MACSTR
+ " -> " MACSTR, MAC2STR(src), MAC2STR(dst));
return;
+ }
- if (ieee802_11_parse_elems(data + 5, len - 5, &elems, 1) ==
- ParseFailed || elems.link_id == NULL)
+ if (len < 5 ||
+ ieee802_11_parse_elems(data + 5, len - 5, &elems, 1) ==
+ ParseFailed || elems.link_id == NULL) {
+ /* Need to match TDLS link based on Dialog Token */
+ rx_data_tdls_setup_response_failure(wt, bssid, sta_addr,
+ data[2], status);
return;
+ }
wpa_printf(MSG_DEBUG, "TDLS Link Identifier: BSSID " MACSTR
" initiator STA " MACSTR " responder STA " MACSTR,
MAC2STR(elems.link_id), MAC2STR(elems.link_id + ETH_ALEN),
MAC2STR(elems.link_id + 2 * ETH_ALEN));
- tdls = get_tdls(wt, elems.link_id);
- if (!tdls)
+ tdls = get_tdls(wt, elems.link_id, 1, bssid);
+ if (!tdls) {
+ add_note(wt, MSG_INFO, "No match TDLS context found");
return;
+ }
+ if (status)
+ tdls->counters[WLANTEST_TDLS_COUNTER_SETUP_RESP_FAIL]++;
+ else
+ tdls->counters[WLANTEST_TDLS_COUNTER_SETUP_RESP_OK]++;
+
+ if (status != WLAN_STATUS_SUCCESS)
+ return;
+
+ if (elems.ftie && elems.ftie_len >= sizeof(struct rsn_ftie)) {
+ const struct rsn_ftie *f;
+ f = (const struct rsn_ftie *) elems.ftie;
+ if (os_memcmp(tdls->inonce, f->snonce, WPA_NONCE_LEN) != 0) {
+ add_note(wt, MSG_INFO, "Mismatch in TDLS initiator "
+ "nonce");
+ }
+ os_memcpy(tdls->rnonce, f->anonce, WPA_NONCE_LEN);
+ }
+
if (tdls_derive_tpk(tdls, bssid, elems.ftie, elems.ftie_len) < 1)
return;
- if (tdls_verify_mic(tdls, 2, &elems) == 0) {
+ if (tdls_verify_mic(wt, tdls, 2, &elems) == 0) {
tdls->dialog_token = data[2];
- wpa_printf(MSG_DEBUG, "TDLS: Dialog Token for the link: %u",
- tdls->dialog_token);
+ add_note(wt, MSG_DEBUG, "TDLS: Dialog Token for the link: %u",
+ tdls->dialog_token);
+ }
+}
+
+
+static void rx_data_tdls_setup_confirm_failure(struct wlantest *wt,
+ const u8 *bssid,
+ const u8 *src,
+ u8 dialog_token, u16 status)
+{
+ struct wlantest_bss *bss;
+ struct wlantest_tdls *tdls;
+ struct wlantest_sta *sta;
+
+ if (status == WLAN_STATUS_SUCCESS) {
+ add_note(wt, MSG_INFO, "TDLS: Invalid TDLS Setup Confirm from "
+ MACSTR, MAC2STR(src));
+ return;
+ }
+
+ bss = bss_find(wt, bssid);
+ if (!bss)
+ return;
+ sta = sta_find(bss, src);
+ if (!sta)
+ return;
+
+ dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
+ if (tdls->init == sta) {
+ if (dialog_token != tdls->dialog_token) {
+ add_note(wt, MSG_DEBUG, "TDLS: Dialog token "
+ "mismatch in TDLS Setup Confirm "
+ "(failure)");
+ break;
+ }
+ add_note(wt, MSG_DEBUG, "TDLS: Found matching TDLS "
+ "setup session based on dialog token");
+ tdls->counters[
+ WLANTEST_TDLS_COUNTER_SETUP_CONF_FAIL]++;
+ break;
+ }
}
}
u16 status;
struct ieee802_11_elems elems;
struct wlantest_tdls *tdls;
+ u8 link_id[3 * ETH_ALEN];
- if (len < 3)
+ if (len < 3) {
+ add_note(wt, MSG_INFO, "Too short TDLS Setup Confirm " MACSTR
+ " -> " MACSTR, MAC2STR(src), MAC2STR(dst));
return;
+ }
status = WPA_GET_LE16(data);
wpa_printf(MSG_DEBUG, "TDLS Setup Confirm " MACSTR " -> "
MACSTR " (status %d)",
MAC2STR(src), MAC2STR(dst), status);
- if (status != WLAN_STATUS_SUCCESS)
- return;
if (ieee802_11_parse_elems(data + 3, len - 3, &elems, 1) ==
- ParseFailed || elems.link_id == NULL)
+ ParseFailed || elems.link_id == NULL) {
+ /* Need to match TDLS link based on Dialog Token */
+ rx_data_tdls_setup_confirm_failure(wt, bssid, src,
+ data[2], status);
return;
+ }
wpa_printf(MSG_DEBUG, "TDLS Link Identifier: BSSID " MACSTR
" initiator STA " MACSTR " responder STA " MACSTR,
MAC2STR(elems.link_id), MAC2STR(elems.link_id + ETH_ALEN),
MAC2STR(elems.link_id + 2 * ETH_ALEN));
- tdls = get_tdls(wt, elems.link_id);
- if (tdls)
- tdls->link_up = 1;
- if (tdls_derive_tpk(tdls, bssid, elems.ftie, elems.ftie_len) < 1)
+ tdls = get_tdls(wt, elems.link_id, 1, bssid);
+ if (tdls == NULL)
+ return;
+ if (status)
+ tdls->counters[WLANTEST_TDLS_COUNTER_SETUP_CONF_FAIL]++;
+ else
+ tdls->counters[WLANTEST_TDLS_COUNTER_SETUP_CONF_OK]++;
+
+ if (status != WLAN_STATUS_SUCCESS)
+ return;
+
+ if (elems.ftie && elems.ftie_len >= sizeof(struct rsn_ftie)) {
+ const struct rsn_ftie *f;
+ f = (const struct rsn_ftie *) elems.ftie;
+ if (os_memcmp(tdls->inonce, f->snonce, WPA_NONCE_LEN) != 0) {
+ add_note(wt, MSG_INFO, "Mismatch in TDLS initiator "
+ "nonce");
+ }
+ if (os_memcmp(tdls->rnonce, f->anonce, WPA_NONCE_LEN) != 0) {
+ add_note(wt, MSG_INFO, "Mismatch in TDLS responder "
+ "nonce");
+ }
+ }
+
+ tdls->link_up = 1;
+ if (tdls_derive_tpk(tdls, bssid, elems.ftie, elems.ftie_len) < 1) {
+ if (elems.ftie == NULL)
+ goto remove_reverse;
return;
- if (tdls_verify_mic(tdls, 3, &elems) == 0) {
+ }
+ if (tdls_verify_mic(wt, tdls, 3, &elems) == 0) {
tdls->dialog_token = data[2];
- wpa_printf(MSG_DEBUG, "TDLS: Dialog Token for the link: %u",
- tdls->dialog_token);
+ add_note(wt, MSG_DEBUG, "TDLS: Link up - Dialog Token: %u",
+ tdls->dialog_token);
+ }
+
+remove_reverse:
+ /*
+ * The TDLS link itself is bidirectional, but there is explicit
+ * initiator/responder roles. Remove the other direction of the link
+ * (if it exists) to make sure that the link counters are stored for
+ * the current TDLS entery.
+ */
+ os_memcpy(link_id, elems.link_id, ETH_ALEN);
+ os_memcpy(link_id + ETH_ALEN, elems.link_id + 2 * ETH_ALEN, ETH_ALEN);
+ os_memcpy(link_id + 2 * ETH_ALEN, elems.link_id + ETH_ALEN, ETH_ALEN);
+ tdls = get_tdls(wt, link_id, 0, bssid);
+ if (tdls) {
+ add_note(wt, MSG_DEBUG, "TDLS: Remove reverse link entry");
+ tdls_deinit(tdls);
}
}
-static int tdls_verify_mic_teardown(struct wlantest_tdls *tdls, u8 trans_seq,
+static int tdls_verify_mic_teardown(struct wlantest *wt,
+ struct wlantest_tdls *tdls, u8 trans_seq,
const u8 *reason_code,
struct ieee802_11_elems *elems)
{
const struct rsn_ftie *rx_ftie;
struct rsn_ftie *tmp_ftie;
- if (elems->link_id == NULL || elems->ftie == NULL)
+ if (elems->link_id == NULL || elems->ftie == NULL ||
+ elems->ftie_len < sizeof(struct rsn_ftie))
return -1;
len = 2 + 18 + 2 + 1 + 1 + 2 + elems->ftie_len;
rx_ftie = (const struct rsn_ftie *) elems->ftie;
if (os_memcmp(mic, rx_ftie->mic, 16) == 0) {
- wpa_printf(MSG_DEBUG, "TDLS: Valid MIC");
+ add_note(wt, MSG_DEBUG, "TDLS: Valid MIC");
return 0;
}
- wpa_printf(MSG_DEBUG, "TDLS: Invalid MIC");
+ add_note(wt, MSG_DEBUG, "TDLS: Invalid MIC");
return -1;
}
MAC2STR(elems.link_id), MAC2STR(elems.link_id + ETH_ALEN),
MAC2STR(elems.link_id + 2 * ETH_ALEN));
- tdls = get_tdls(wt, elems.link_id);
- if (tdls)
+ tdls = get_tdls(wt, elems.link_id, 1, bssid);
+ if (tdls) {
+ if (tdls->link_up)
+ add_note(wt, MSG_DEBUG, "TDLS: Link down");
tdls->link_up = 0;
- tdls_verify_mic_teardown(tdls, 4, data, &elems);
+ tdls->counters[WLANTEST_TDLS_COUNTER_TEARDOWN]++;
+ tdls_verify_mic_teardown(wt, tdls, 4, data, &elems);
+ }
}
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