/*
* Received Data frame processing
- * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2010-2015, 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 <linux/if_ether.h>
#include "utils/common.h"
#include "common/defs.h"
static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
const u8 *sta_addr, const u8 *dst, const u8 *src,
- u16 ethertype, const u8 *data, size_t len, int prot)
+ u16 ethertype, const u8 *data, size_t len, int prot,
+ const u8 *peer_addr);
+
+static void rx_data_vlan(struct wlantest *wt, const u8 *bssid,
+ const u8 *sta_addr, const u8 *dst, const u8 *src,
+ const u8 *data, size_t len, int prot,
+ const u8 *peer_addr)
+{
+ u16 tag;
+
+ if (len < 4)
+ return;
+ tag = WPA_GET_BE16(data);
+ wpa_printf(MSG_MSGDUMP, "VLAN tag: Priority=%u ID=%u",
+ tag >> 12, tag & 0x0ffff);
+ /* ignore VLAN information and process the original frame */
+ rx_data_eth(wt, bssid, sta_addr, dst, src, WPA_GET_BE16(data + 2),
+ data + 4, len - 4, prot, peer_addr);
+}
+
+
+static void rx_data_eth(struct wlantest *wt, const u8 *bssid,
+ const u8 *sta_addr, const u8 *dst, const u8 *src,
+ u16 ethertype, const u8 *data, size_t len, int prot,
+ const u8 *peer_addr)
{
switch (ethertype) {
case ETH_P_PAE:
- rx_data_eapol(wt, dst, src, data, len, prot);
+ rx_data_eapol(wt, bssid, sta_addr, dst, src, data, len, prot);
break;
case ETH_P_IP:
- rx_data_ip(wt, bssid, sta_addr, dst, src, data, len);
+ rx_data_ip(wt, bssid, sta_addr, dst, src, data, len,
+ peer_addr);
break;
case 0x890d:
rx_data_80211_encap(wt, bssid, sta_addr, dst, src, data, len);
break;
+ case ETH_P_8021Q:
+ rx_data_vlan(wt, bssid, sta_addr, dst, src, data, len, prot,
+ peer_addr);
+ break;
}
}
static void rx_data_process(struct wlantest *wt, const u8 *bssid,
const u8 *sta_addr,
const u8 *dst, const u8 *src,
- const u8 *data, size_t len, int prot)
+ const u8 *data, size_t len, int prot,
+ const u8 *peer_addr)
{
if (len == 0)
return;
if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
rx_data_eth(wt, bssid, sta_addr, dst, src,
- WPA_GET_BE16(data + 6), data + 8, len - 8, prot);
+ WPA_GET_BE16(data + 6), data + 8, len - 8, prot,
+ peer_addr);
return;
}
}
+static void write_decrypted_note(struct wlantest *wt, const u8 *decrypted,
+ const u8 *tk, size_t tk_len, int keyid)
+{
+ char tk_hex[65];
+
+ if (!decrypted)
+ return;
+
+ wpa_snprintf_hex(tk_hex, sizeof(tk_hex), tk, tk_len);
+ add_note(wt, MSG_EXCESSIVE, "TK[%d] %s", keyid, tk_hex);
+}
+
+
+static u8 * try_ptk(int pairwise_cipher, struct wpa_ptk *ptk,
+ const struct ieee80211_hdr *hdr,
+ const u8 *data, size_t data_len, size_t *decrypted_len)
+{
+ u8 *decrypted;
+ unsigned int tk_len = ptk->tk_len;
+
+ decrypted = NULL;
+ if ((pairwise_cipher == WPA_CIPHER_CCMP ||
+ pairwise_cipher == 0) && tk_len == 16) {
+ decrypted = ccmp_decrypt(ptk->tk, hdr, data,
+ data_len, decrypted_len);
+ } else if ((pairwise_cipher == WPA_CIPHER_CCMP_256 ||
+ pairwise_cipher == 0) && tk_len == 32) {
+ decrypted = ccmp_256_decrypt(ptk->tk, hdr, data,
+ data_len, decrypted_len);
+ } else if ((pairwise_cipher == WPA_CIPHER_GCMP ||
+ pairwise_cipher == WPA_CIPHER_GCMP_256 ||
+ pairwise_cipher == 0) &&
+ (tk_len == 16 || tk_len == 32)) {
+ decrypted = gcmp_decrypt(ptk->tk, tk_len, hdr,
+ data, data_len, decrypted_len);
+ } else if ((pairwise_cipher == WPA_CIPHER_TKIP ||
+ pairwise_cipher == 0) && tk_len == 32) {
+ decrypted = tkip_decrypt(ptk->tk, hdr, data, data_len,
+ decrypted_len);
+ }
+
+ return decrypted;
+}
+
+
+static u8 * try_all_ptk(struct wlantest *wt, int pairwise_cipher,
+ const struct ieee80211_hdr *hdr, int keyid,
+ const u8 *data, size_t data_len, size_t *decrypted_len)
+{
+ struct wlantest_ptk *ptk;
+ u8 *decrypted;
+ int prev_level = wpa_debug_level;
+
+ wpa_debug_level = MSG_WARNING;
+ dl_list_for_each(ptk, &wt->ptk, struct wlantest_ptk, list) {
+ decrypted = try_ptk(pairwise_cipher, &ptk->ptk, hdr,
+ data, data_len, decrypted_len);
+ if (decrypted) {
+ wpa_debug_level = prev_level;
+ add_note(wt, MSG_DEBUG,
+ "Found PTK match from list of all known PTKs");
+ write_decrypted_note(wt, decrypted, ptk->ptk.tk,
+ ptk->ptk.tk_len, keyid);
+ return decrypted;
+ }
+ }
+ wpa_debug_level = prev_level;
+
+ return NULL;
+}
+
+
+static void check_plaintext_prot(struct wlantest *wt,
+ const struct ieee80211_hdr *hdr,
+ const u8 *data, size_t len)
+{
+ if (len < 8 + 3 || data[8] != 0xaa || data[9] != 0xaa ||
+ data[10] != 0x03)
+ return;
+
+ add_note(wt, MSG_DEBUG,
+ "Plaintext payload in protected frame");
+ wpa_printf(MSG_INFO, "Plaintext payload in protected frame #%u: A2="
+ MACSTR " seq=%u",
+ wt->frame_num, MAC2STR(hdr->addr2),
+ WLAN_GET_SEQ_SEQ(le_to_host16(hdr->seq_ctrl)));
+}
+
+
static void rx_data_bss_prot_group(struct wlantest *wt,
const struct ieee80211_hdr *hdr,
+ size_t hdrlen,
const u8 *qos, const u8 *dst, const u8 *src,
const u8 *data, size_t len)
{
struct wlantest_bss *bss;
int keyid;
- u8 *decrypted;
+ u8 *decrypted = NULL;
size_t dlen;
u8 pn[6];
+ int replay = 0;
bss = bss_get(wt, hdr->addr2);
if (bss == NULL)
return;
if (len < 4) {
- wpa_printf(MSG_INFO, "Too short group addressed data frame");
+ add_note(wt, MSG_INFO, "Too short group addressed data frame");
return;
}
if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
!(data[3] & 0x20)) {
- wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
- MACSTR " did not have ExtIV bit set to 1",
- MAC2STR(bss->bssid));
- return;
+ add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
+ MACSTR " did not have ExtIV bit set to 1",
+ MAC2STR(bss->bssid));
+ return;
}
if (bss->group_cipher == WPA_CIPHER_TKIP) {
if (data[3] & 0x1f) {
- wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
- "non-zero reserved bit",
- MAC2STR(bss->bssid));
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(bss->bssid));
}
if (data[1] != ((data[0] | 0x20) & 0x7f)) {
- wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
- "incorrect WEPSeed[1] (was 0x%x, expected "
- "0x%x)",
- MAC2STR(bss->bssid), data[1],
- (data[0] | 0x20) & 0x7f);
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used incorrect WEPSeed[1] (was 0x%x, "
+ "expected 0x%x)",
+ MAC2STR(bss->bssid), data[1],
+ (data[0] | 0x20) & 0x7f);
}
} else if (bss->group_cipher == WPA_CIPHER_CCMP) {
if (data[2] != 0 || (data[3] & 0x1f) != 0) {
- wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
- "non-zero reserved bit",
- MAC2STR(bss->bssid));
+ add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(bss->bssid));
}
}
+ check_plaintext_prot(wt, hdr, data, len);
keyid = data[3] >> 6;
- if (bss->gtk_len[keyid] == 0) {
- wpa_printf(MSG_MSGDUMP, "No GTK known to decrypt the frame "
- "(A2=" MACSTR " KeyID=%d)",
- MAC2STR(hdr->addr2), keyid);
+ if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40)
+ {
+ add_note(wt, MSG_MSGDUMP, "No GTK known to decrypt the frame "
+ "(A2=" MACSTR " KeyID=%d)",
+ MAC2STR(hdr->addr2), keyid);
return;
}
if (bss->group_cipher == WPA_CIPHER_TKIP)
tkip_get_pn(pn, data);
+ else if (bss->group_cipher == WPA_CIPHER_WEP40)
+ goto skip_replay_det;
else
ccmp_get_pn(pn, data);
if (os_memcmp(pn, bss->rsc[keyid], 6) <= 0) {
- wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: SA=" MACSTR,
- MAC2STR(hdr->addr2));
+ u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
+ char pn_hex[6 * 2 + 1], rsc_hex[6 * 2 + 1];
+
+ wpa_snprintf_hex(pn_hex, sizeof(pn_hex), pn, 6);
+ wpa_snprintf_hex(rsc_hex, sizeof(rsc_hex), bss->rsc[keyid], 6);
+ add_note(wt, MSG_INFO, "replay detected: A1=" MACSTR
+ " A2=" MACSTR " A3=" MACSTR
+ " seq=%u frag=%u%s keyid=%d %s<=%s",
+ MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
+ MAC2STR(hdr->addr3),
+ WLAN_GET_SEQ_SEQ(seq_ctrl),
+ WLAN_GET_SEQ_FRAG(seq_ctrl),
+ (le_to_host16(hdr->frame_control) & WLAN_FC_RETRY) ?
+ " Retry" : "",
+ keyid, pn_hex, rsc_hex);
wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
+ replay = 1;
}
+skip_replay_det:
if (bss->group_cipher == WPA_CIPHER_TKIP)
decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
&dlen);
- else
+ else if (bss->group_cipher == WPA_CIPHER_WEP40)
+ decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
+ else if (bss->group_cipher == WPA_CIPHER_CCMP)
decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
&dlen);
+ else if (bss->group_cipher == WPA_CIPHER_CCMP_256)
+ decrypted = ccmp_256_decrypt(bss->gtk[keyid], hdr, data, len,
+ &dlen);
+ else if (bss->group_cipher == WPA_CIPHER_GCMP ||
+ bss->group_cipher == WPA_CIPHER_GCMP_256)
+ decrypted = gcmp_decrypt(bss->gtk[keyid], bss->gtk_len[keyid],
+ hdr, data, len, &dlen);
+
if (decrypted) {
+ char gtk[65];
+
+ wpa_snprintf_hex(gtk, sizeof(gtk), bss->gtk[keyid],
+ bss->gtk_len[keyid]);
+ add_note(wt, MSG_EXCESSIVE, "GTK[%d] %s", keyid, gtk);
rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
- dlen, 1);
- os_memcpy(bss->rsc[keyid], pn, 6);
- write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
+ dlen, 1, NULL);
+ if (!replay)
+ os_memcpy(bss->rsc[keyid], pn, 6);
+ write_pcap_decrypted(wt, (const u8 *) hdr, hdrlen,
decrypted, dlen);
- }
+ } else
+ add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
os_free(decrypted);
}
static void rx_data_bss_prot(struct wlantest *wt,
- const struct ieee80211_hdr *hdr, const u8 *qos,
- const u8 *dst, const u8 *src, const u8 *data,
- size_t len)
+ const struct ieee80211_hdr *hdr, size_t hdrlen,
+ const u8 *qos, const u8 *dst, const u8 *src,
+ const u8 *data, size_t len)
{
- struct wlantest_bss *bss;
+ struct wlantest_bss *bss, *bss2;
struct wlantest_sta *sta, *sta2;
int keyid;
u16 fc = le_to_host16(hdr->frame_control);
- u8 *decrypted;
+ u8 *decrypted = NULL;
size_t dlen;
int tid;
- u8 pn[6], *rsc;
- struct wlantest_tdls *tdls = NULL;
+ u8 pn[6], *rsc = NULL;
+ struct wlantest_tdls *tdls = NULL, *found;
const u8 *tk = NULL;
+ int ptk_iter_done = 0;
+ int try_ptk_iter = 0;
+ int replay = 0;
if (hdr->addr1[0] & 0x01) {
- rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
+ rx_data_bss_prot_group(wt, hdr, hdrlen, qos, dst, src,
+ data, len);
return;
}
- if (fc & WLAN_FC_TODS) {
+ if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
+ (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
+ bss = bss_find(wt, hdr->addr1);
+ if (bss) {
+ sta = sta_find(bss, hdr->addr2);
+ if (sta) {
+ sta->counters[
+ WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
+ }
+ if (!sta || !sta->ptk_set) {
+ bss2 = bss_find(wt, hdr->addr2);
+ if (bss2) {
+ sta2 = sta_find(bss2, hdr->addr1);
+ if (sta2 && (!sta || sta2->ptk_set)) {
+ bss = bss2;
+ sta = sta2;
+ }
+ }
+ }
+ } else {
+ bss = bss_find(wt, hdr->addr2);
+ if (!bss)
+ return;
+ sta = sta_find(bss, hdr->addr1);
+ }
+ } else if (fc & WLAN_FC_TODS) {
bss = bss_get(wt, hdr->addr1);
if (bss == NULL)
return;
sta = sta_get(bss, hdr->addr2);
+ if (sta)
+ sta->counters[WLANTEST_STA_COUNTER_PROT_DATA_TX]++;
} else if (fc & WLAN_FC_FROMDS) {
bss = bss_get(wt, hdr->addr2);
if (bss == NULL)
sta2 = sta_find(bss, hdr->addr1);
if (sta == NULL || sta2 == NULL)
return;
+ found = NULL;
dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list)
{
if ((tdls->init == sta && tdls->resp == sta2) ||
(tdls->init == sta2 && tdls->resp == sta)) {
- if (!tdls->link_up)
- wpa_printf(MSG_DEBUG, "TDLS: Link not "
- "up, but Data frame seen");
- tk = tdls->tpk.tk;
- break;
+ found = tdls;
+ if (tdls->link_up)
+ break;
}
}
+ if (found) {
+ if (!found->link_up)
+ add_note(wt, MSG_DEBUG,
+ "TDLS: Link not up, but Data "
+ "frame seen");
+ tk = found->tpk.tk;
+ tdls = found;
+ }
}
- if ((sta == NULL || !sta->ptk_set) && tk == NULL) {
- wpa_printf(MSG_MSGDUMP, "No PTK known to decrypt the frame");
- return;
+ check_plaintext_prot(wt, hdr, data, len);
+ if ((sta == NULL ||
+ (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) &&
+ tk == NULL) {
+ add_note(wt, MSG_MSGDUMP, "No PTK known to decrypt the frame");
+ if (dl_list_empty(&wt->ptk)) {
+ if (len >= 4 && sta) {
+ keyid = data[3] >> 6;
+ goto check_zero_tk;
+ }
+ return;
+ }
+
+ try_ptk_iter = 1;
}
if (len < 4) {
- wpa_printf(MSG_INFO, "Too short encrypted data frame");
+ add_note(wt, MSG_INFO, "Too short encrypted data frame");
return;
}
+ if (sta == NULL)
+ return;
if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
!(data[3] & 0x20)) {
- wpa_printf(MSG_INFO, "Expected TKIP/CCMP frame from "
- MACSTR " did not have ExtIV bit set to 1",
- MAC2STR(src));
- return;
+ add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
+ MACSTR " did not have ExtIV bit set to 1",
+ MAC2STR(src));
+ return;
}
if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
if (data[3] & 0x1f) {
- wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
- "non-zero reserved bit",
- MAC2STR(hdr->addr2));
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(hdr->addr2));
}
if (data[1] != ((data[0] | 0x20) & 0x7f)) {
- wpa_printf(MSG_INFO, "TKIP frame from " MACSTR " used "
- "incorrect WEPSeed[1] (was 0x%x, expected "
- "0x%x)",
- MAC2STR(hdr->addr2), data[1],
- (data[0] | 0x20) & 0x7f);
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used incorrect WEPSeed[1] (was 0x%x, "
+ "expected 0x%x)",
+ MAC2STR(hdr->addr2), data[1],
+ (data[0] | 0x20) & 0x7f);
}
} else if (tk || sta->pairwise_cipher == WPA_CIPHER_CCMP) {
if (data[2] != 0 || (data[3] & 0x1f) != 0) {
- wpa_printf(MSG_INFO, "CCMP frame from " MACSTR " used "
- "non-zero reserved bit",
- MAC2STR(hdr->addr2));
+ add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(hdr->addr2));
}
}
keyid = data[3] >> 6;
- if (keyid != 0) {
- wpa_printf(MSG_INFO, "Unexpected non-zero KeyID %d in "
- "individually addressed Data frame from " MACSTR,
- keyid, MAC2STR(hdr->addr2));
+ if (keyid != 0 &&
+ (!(sta->rsn_capab & WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST) ||
+ !(bss->rsn_capab & WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST) ||
+ keyid != 1)) {
+ add_note(wt, MSG_INFO,
+ "Unexpected KeyID %d in individually addressed Data frame from "
+ MACSTR,
+ keyid, MAC2STR(hdr->addr2));
}
- if (qos)
+ if (qos) {
tid = qos[0] & 0x0f;
- else
+ if (fc & WLAN_FC_TODS)
+ sta->tx_tid[tid]++;
+ else
+ sta->rx_tid[tid]++;
+ } else {
tid = 0;
+ if (fc & WLAN_FC_TODS)
+ sta->tx_tid[16]++;
+ else
+ sta->rx_tid[16]++;
+ }
if (tk) {
if (os_memcmp(hdr->addr2, tdls->init->addr, ETH_ALEN) == 0)
rsc = tdls->rsc_init[tid];
else
rsc = tdls->rsc_resp[tid];
+ } else if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
+ (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
+ if (os_memcmp(sta->addr, hdr->addr2, ETH_ALEN) == 0)
+ rsc = sta->rsc_tods[tid];
+ else
+ rsc = sta->rsc_fromds[tid];
} else if (fc & WLAN_FC_TODS)
rsc = sta->rsc_tods[tid];
else
if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP)
tkip_get_pn(pn, data);
+ else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
+ goto skip_replay_det;
else
ccmp_get_pn(pn, data);
if (os_memcmp(pn, rsc, 6) <= 0) {
- wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: SA=" MACSTR,
- MAC2STR(hdr->addr2));
+ u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
+ char pn_hex[6 * 2 + 1], rsc_hex[6 * 2 + 1];
+
+ wpa_snprintf_hex(pn_hex, sizeof(pn_hex), pn, 6);
+ wpa_snprintf_hex(rsc_hex, sizeof(rsc_hex), rsc, 6);
+ add_note(wt, MSG_INFO, "replay detected: A1=" MACSTR
+ " A2=" MACSTR " A3=" MACSTR
+ " seq=%u frag=%u%s keyid=%d tid=%d %s<=%s",
+ MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
+ MAC2STR(hdr->addr3),
+ WLAN_GET_SEQ_SEQ(seq_ctrl),
+ WLAN_GET_SEQ_FRAG(seq_ctrl),
+ (le_to_host16(hdr->frame_control) & WLAN_FC_RETRY) ?
+ " Retry" : "",
+ keyid, tid, pn_hex, rsc_hex);
wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
+ replay = 1;
}
- if (tk)
- decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
- else if (sta->pairwise_cipher == WPA_CIPHER_TKIP)
- decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
- else
- decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
+skip_replay_det:
+ if (tk) {
+ if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256) {
+ decrypted = ccmp_256_decrypt(tk, hdr, data, len, &dlen);
+ write_decrypted_note(wt, decrypted, tk, 32, keyid);
+ } else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
+ sta->pairwise_cipher == WPA_CIPHER_GCMP_256) {
+ decrypted = gcmp_decrypt(tk, sta->ptk.tk_len, hdr, data,
+ len, &dlen);
+ write_decrypted_note(wt, decrypted, tk, sta->ptk.tk_len,
+ keyid);
+ } else {
+ decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
+ write_decrypted_note(wt, decrypted, tk, 16, keyid);
+ }
+ } else if (sta->pairwise_cipher == WPA_CIPHER_TKIP) {
+ decrypted = tkip_decrypt(sta->ptk.tk, hdr, data, len, &dlen);
+ write_decrypted_note(wt, decrypted, sta->ptk.tk, 32, keyid);
+ } else if (sta->pairwise_cipher == WPA_CIPHER_WEP40) {
+ decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
+ } else if (sta->ptk_set) {
+ if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
+ decrypted = ccmp_256_decrypt(sta->ptk.tk, hdr, data,
+ len, &dlen);
+ else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
+ sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
+ decrypted = gcmp_decrypt(sta->ptk.tk, sta->ptk.tk_len,
+ hdr, data, len, &dlen);
+ else
+ decrypted = ccmp_decrypt(sta->ptk.tk, hdr, data, len,
+ &dlen);
+ write_decrypted_note(wt, decrypted, sta->ptk.tk,
+ sta->ptk.tk_len, keyid);
+ } else {
+ decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, keyid,
+ data, len, &dlen);
+ ptk_iter_done = 1;
+ }
+ if (!decrypted && !ptk_iter_done) {
+ decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, keyid,
+ data, len, &dlen);
+ if (decrypted) {
+ add_note(wt, MSG_DEBUG, "Current PTK did not work, but found a match from all known PTKs");
+ }
+ }
+check_zero_tk:
+ if (!decrypted) {
+ struct wpa_ptk zero_ptk;
+ int old_debug_level = wpa_debug_level;
+
+ os_memset(&zero_ptk, 0, sizeof(zero_ptk));
+ zero_ptk.tk_len = wpa_cipher_key_len(sta->pairwise_cipher);
+ wpa_debug_level = MSG_ERROR;
+ decrypted = try_ptk(sta->pairwise_cipher, &zero_ptk, hdr,
+ data, len, &dlen);
+ wpa_debug_level = old_debug_level;
+ if (decrypted) {
+ add_note(wt, MSG_DEBUG,
+ "Frame was encrypted with zero TK");
+ wpa_printf(MSG_INFO, "Zero TK used in frame #%u: A2="
+ MACSTR " seq=%u",
+ wt->frame_num, MAC2STR(hdr->addr2),
+ WLAN_GET_SEQ_SEQ(
+ le_to_host16(hdr->seq_ctrl)));
+ write_decrypted_note(wt, decrypted, zero_ptk.tk,
+ zero_ptk.tk_len, keyid);
+ }
+ }
if (decrypted) {
+ u16 fc = le_to_host16(hdr->frame_control);
+ const u8 *peer_addr = NULL;
+ if (!(fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)))
+ peer_addr = hdr->addr1;
+ if (!replay && rsc)
+ os_memcpy(rsc, pn, 6);
rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
- dlen, 1);
- os_memcpy(rsc, pn, 6);
- write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
+ dlen, 1, peer_addr);
+ write_pcap_decrypted(wt, (const u8 *) hdr, hdrlen,
decrypted, dlen);
+ } else {
+ if (!try_ptk_iter)
+ add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
+
+ /* Assume the frame was corrupted and there was no FCS to check.
+ * Allow retry of this particular frame to be processed so that
+ * it could end up getting decrypted if it was received without
+ * corruption. */
+ sta->allow_duplicate = 1;
}
os_free(decrypted);
}
static void rx_data_bss(struct wlantest *wt, const struct ieee80211_hdr *hdr,
- const u8 *qos, const u8 *dst, const u8 *src,
- const u8 *data, size_t len)
+ size_t hdrlen, const u8 *qos, const u8 *dst,
+ const u8 *src, const u8 *data, size_t len)
{
u16 fc = le_to_host16(hdr->frame_control);
int prot = !!(fc & WLAN_FC_ISWEP);
}
if (prot)
- rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
+ rx_data_bss_prot(wt, hdr, hdrlen, qos, dst, src, data, len);
else {
- const u8 *bssid, *sta_addr;
+ const u8 *bssid, *sta_addr, *peer_addr;
+ struct wlantest_bss *bss;
+
if (fc & WLAN_FC_TODS) {
bssid = hdr->addr1;
sta_addr = hdr->addr2;
- } else {
+ peer_addr = NULL;
+ } else if (fc & WLAN_FC_FROMDS) {
bssid = hdr->addr2;
sta_addr = hdr->addr1;
+ peer_addr = NULL;
+ } else {
+ bssid = hdr->addr3;
+ sta_addr = hdr->addr2;
+ peer_addr = hdr->addr1;
+ }
+
+ bss = bss_get(wt, bssid);
+ if (bss) {
+ struct wlantest_sta *sta = sta_get(bss, sta_addr);
+
+ if (sta) {
+ if (qos) {
+ int tid = qos[0] & 0x0f;
+ if (fc & WLAN_FC_TODS)
+ sta->tx_tid[tid]++;
+ else
+ sta->rx_tid[tid]++;
+ } else {
+ if (fc & WLAN_FC_TODS)
+ sta->tx_tid[16]++;
+ else
+ sta->rx_tid[16]++;
+ }
+ }
}
- rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0);
+
+ rx_data_process(wt, bssid, sta_addr, dst, src, data, len, 0,
+ peer_addr);
}
}
{
struct wlantest_bss *bss;
struct wlantest_sta *sta1, *sta2;
- struct wlantest_tdls *tdls;
+ struct wlantest_tdls *tdls, *found = NULL;
bss = bss_find(wt, bssid);
if (bss == NULL)
dl_list_for_each(tdls, &bss->tdls, struct wlantest_tdls, list) {
if ((tdls->init == sta1 && tdls->resp == sta2) ||
- (tdls->init == sta2 && tdls->resp == sta1))
- return tdls;
+ (tdls->init == sta2 && tdls->resp == sta1)) {
+ found = tdls;
+ if (tdls->link_up)
+ break;
+ }
}
- return NULL;
+ return found;
}
MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
MAC2STR(hdr->addr3));
add_direct_link(wt, hdr->addr3, hdr->addr1, hdr->addr2);
- rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
+ rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr2,
data + hdrlen, len - hdrlen);
break;
case WLAN_FC_FROMDS:
MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
MAC2STR(hdr->addr3));
add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
- rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
+ rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr3,
data + hdrlen, len - hdrlen);
break;
case WLAN_FC_TODS:
MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
MAC2STR(hdr->addr3));
add_ap_path(wt, hdr->addr1, hdr->addr3, hdr->addr2);
- rx_data_bss(wt, hdr, qos, hdr->addr3, hdr->addr2,
+ rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr3, hdr->addr2,
data + hdrlen, len - hdrlen);
break;
case WLAN_FC_TODS | WLAN_FC_FROMDS:
MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
MAC2STR(hdr->addr3),
MAC2STR((const u8 *) (hdr + 1)));
+ rx_data_bss(wt, hdr, hdrlen, qos, hdr->addr1, hdr->addr2,
+ data + hdrlen, len - hdrlen);
break;
}
}