/*
* 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 "utils/common.h"
+#include "common/defs.h"
#include "common/ieee802_11_defs.h"
-#include "common/eapol_common.h"
-#include "common/wpa_common.h"
#include "wlantest.h"
}
-static void rx_data_eapol_key_1_of_4(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
-{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 1/4 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
-}
-
-
-static void rx_data_eapol_key_2_of_4(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
+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)
{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 2/4 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
+ switch (ethertype) {
+ case ETH_P_PAE:
+ rx_data_eapol(wt, dst, src, data, len, prot);
+ break;
+ case ETH_P_IP:
+ 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;
+ }
}
-static void rx_data_eapol_key_3_of_4(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
+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 *peer_addr)
{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 3/4 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
-}
+ 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,
+ peer_addr);
+ return;
+ }
-static void rx_data_eapol_key_4_of_4(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
-{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 4/4 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
+ wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
}
-static void rx_data_eapol_key_1_of_2(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
+static u8 * try_all_ptk(struct wlantest *wt, int pairwise_cipher,
+ const struct ieee80211_hdr *hdr,
+ const u8 *data, size_t data_len, size_t *decrypted_len)
{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 1/2 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
-}
-
+ 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) {
+ unsigned int tk_len = ptk->ptk_len - 32;
+ decrypted = NULL;
+ if ((pairwise_cipher == WPA_CIPHER_CCMP ||
+ pairwise_cipher == 0) && tk_len == 16) {
+ decrypted = ccmp_decrypt(ptk->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->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->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->ptk.tk, 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");
+ return decrypted;
+ }
+ }
+ wpa_debug_level = prev_level;
-static void rx_data_eapol_key_2_of_2(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len)
-{
- wpa_printf(MSG_DEBUG, "EAPOL-Key 2/2 " MACSTR " -> " MACSTR,
- MAC2STR(src), MAC2STR(dst));
+ return NULL;
}
-static void rx_data_eapol_key(struct wlantest *wt, const u8 *dst,
- const u8 *src, const u8 *data, size_t len,
- int prot)
+static void rx_data_bss_prot_group(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 wpa_eapol_key *hdr;
- u16 key_info, key_length, ver, key_data_length;
-
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key", data, len);
- if (len < sizeof(*hdr)) {
- wpa_printf(MSG_INFO, "Too short EAPOL-Key frame from " MACSTR,
- MAC2STR(src));
+ struct wlantest_bss *bss;
+ int keyid;
+ u8 *decrypted = NULL;
+ size_t dlen;
+ u8 pn[6];
+
+ bss = bss_get(wt, hdr->addr2);
+ if (bss == NULL)
+ return;
+ if (len < 4) {
+ add_note(wt, MSG_INFO, "Too short group addressed data frame");
return;
}
- hdr = (const struct wpa_eapol_key *) data;
- if (hdr->type == EAPOL_KEY_TYPE_RC4) {
- /* TODO: EAPOL-Key RC4 for WEP */
+ if (bss->group_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
+ !(data[3] & 0x20)) {
+ add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
+ MACSTR " did not have ExtIV bit set to 1",
+ MAC2STR(bss->bssid));
return;
}
- if (hdr->type != EAPOL_KEY_TYPE_RSN &&
- hdr->type != EAPOL_KEY_TYPE_WPA) {
- wpa_printf(MSG_DEBUG, "Unsupported EAPOL-Key type %u",
- hdr->type);
- return;
+ if (bss->group_cipher == WPA_CIPHER_TKIP) {
+ if (data[3] & 0x1f) {
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(bss->bssid));
+ }
+ if (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) {
+ add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(bss->bssid));
+ }
}
- key_info = WPA_GET_BE16(hdr->key_info);
- key_length = WPA_GET_BE16(hdr->key_length);
- key_data_length = WPA_GET_BE16(hdr->key_data_length);
- ver = key_info & WPA_KEY_INFO_TYPE_MASK;
- wpa_printf(MSG_DEBUG, "EAPOL-Key ver=%u %c idx=%u%s%s%s%s%s%s%s%s "
- "datalen=%u",
- ver, key_info & WPA_KEY_INFO_KEY_TYPE ? 'P' : 'G',
- (key_info & WPA_KEY_INFO_KEY_INDEX_MASK) >>
- WPA_KEY_INFO_KEY_INDEX_SHIFT,
- (key_info & WPA_KEY_INFO_INSTALL) ? " Install" : "",
- (key_info & WPA_KEY_INFO_ACK) ? " ACK" : "",
- (key_info & WPA_KEY_INFO_MIC) ? " MIC" : "",
- (key_info & WPA_KEY_INFO_SECURE) ? " Secure" : "",
- (key_info & WPA_KEY_INFO_ERROR) ? " Error" : "",
- (key_info & WPA_KEY_INFO_REQUEST) ? " Request" : "",
- (key_info & WPA_KEY_INFO_ENCR_KEY_DATA) ? " Encr" : "",
- (key_info & WPA_KEY_INFO_SMK_MESSAGE) ? " SMK" : "",
- key_data_length);
-
- if (ver != WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 &&
- ver != WPA_KEY_INFO_TYPE_HMAC_SHA1_AES &&
- ver != WPA_KEY_INFO_TYPE_AES_128_CMAC) {
- wpa_printf(MSG_DEBUG, "Unsupported EAPOL-Key Key Descriptor "
- "Version %u", ver);
+ keyid = data[3] >> 6;
+ 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;
}
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key Replay Counter",
- hdr->replay_counter, WPA_REPLAY_COUNTER_LEN);
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key Key Nonce",
- hdr->key_nonce, WPA_NONCE_LEN);
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key Key IV",
- hdr->key_iv, 16);
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key RSC",
- hdr->key_nonce, WPA_KEY_RSC_LEN);
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Key Key MIC",
- hdr->key_mic, 16);
-
- if (key_info & (WPA_KEY_INFO_ERROR | WPA_KEY_INFO_REQUEST))
- 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) {
+ u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
+ add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
+ " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u%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" : "");
+ wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
+ wpa_hexdump(MSG_INFO, "RSC", bss->rsc[keyid], 6);
+ }
- if (key_info & WPA_KEY_INFO_SMK_MESSAGE)
+skip_replay_det:
+ if (bss->group_cipher == WPA_CIPHER_TKIP)
+ decrypted = tkip_decrypt(bss->gtk[keyid], hdr, data, len,
+ &dlen);
+ 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) {
+ rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
+ dlen, 1, NULL);
+ os_memcpy(bss->rsc[keyid], pn, 6);
+ write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
+ 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)
+{
+ struct wlantest_bss *bss;
+ struct wlantest_sta *sta, *sta2;
+ int keyid;
+ u16 fc = le_to_host16(hdr->frame_control);
+ u8 *decrypted;
+ size_t dlen;
+ int tid;
+ u8 pn[6], *rsc;
+ struct wlantest_tdls *tdls = NULL, *found;
+ const u8 *tk = NULL;
+ int ptk_iter_done = 0;
+ int try_ptk_iter = 0;
+
+ if (hdr->addr1[0] & 0x01) {
+ rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
return;
+ }
- if (key_info & WPA_KEY_INFO_KEY_TYPE) {
- /* 4-Way Handshake */
- switch (key_info & (WPA_KEY_INFO_SECURE |
- WPA_KEY_INFO_MIC |
- WPA_KEY_INFO_ACK |
- WPA_KEY_INFO_INSTALL)) {
- case WPA_KEY_INFO_ACK:
- rx_data_eapol_key_1_of_4(wt, dst, src, data, len);
- break;
- case WPA_KEY_INFO_MIC:
- rx_data_eapol_key_2_of_4(wt, dst, src, data, len);
- break;
- case WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
- WPA_KEY_INFO_ACK | WPA_KEY_INFO_INSTALL:
- rx_data_eapol_key_3_of_4(wt, dst, src, data, len);
- break;
- case WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC:
- rx_data_eapol_key_4_of_4(wt, dst, src, data, len);
- break;
- default:
- wpa_printf(MSG_DEBUG, "Unsupported EAPOL-Key frame");
- break;
- }
+ 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)
+ return;
+ sta = sta_get(bss, hdr->addr1);
} else {
- /* Group Key Handshake */
- switch (key_info & (WPA_KEY_INFO_SECURE |
- WPA_KEY_INFO_MIC |
- WPA_KEY_INFO_ACK)) {
- case WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC |
- WPA_KEY_INFO_ACK:
- rx_data_eapol_key_1_of_2(wt, dst, src, data, len);
- break;
- case WPA_KEY_INFO_SECURE | WPA_KEY_INFO_MIC:
- rx_data_eapol_key_2_of_2(wt, dst, src, data, len);
- break;
- default:
- wpa_printf(MSG_DEBUG, "Unsupported EAPOL-Key frame");
- break;
+ bss = bss_get(wt, hdr->addr3);
+ if (bss == NULL)
+ return;
+ sta = sta_find(bss, hdr->addr2);
+ 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)) {
+ 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 && 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))
+ return;
+ try_ptk_iter = 1;
+ }
-static void rx_data_eapol(struct wlantest *wt, const u8 *dst, const u8 *src,
- const u8 *data, size_t len, int prot)
-{
- const struct ieee802_1x_hdr *hdr;
- u16 length;
- const u8 *p;
-
- wpa_hexdump(MSG_EXCESSIVE, "EAPOL", data, len);
- if (len < sizeof(*hdr)) {
- wpa_printf(MSG_INFO, "Too short EAPOL frame from " MACSTR,
- MAC2STR(src));
+ if (len < 4) {
+ add_note(wt, MSG_INFO, "Too short encrypted data frame");
return;
}
- hdr = (const struct ieee802_1x_hdr *) data;
- length = be_to_host16(hdr->length);
- wpa_printf(MSG_DEBUG, "RX EAPOL: " MACSTR " -> " MACSTR "%s ver=%u "
- "type=%u len=%u",
- MAC2STR(src), MAC2STR(dst), prot ? " Prot" : "",
- hdr->version, hdr->type, length);
- if (sizeof(*hdr) + length > len) {
- wpa_printf(MSG_INFO, "Truncated EAPOL frame from " MACSTR,
- MAC2STR(src));
+ if (sta == NULL)
+ return;
+ if (sta->pairwise_cipher & (WPA_CIPHER_TKIP | WPA_CIPHER_CCMP) &&
+ !(data[3] & 0x20)) {
+ add_note(wt, MSG_INFO, "Expected TKIP/CCMP frame from "
+ MACSTR " did not have ExtIV bit set to 1",
+ MAC2STR(src));
return;
}
- if (sizeof(*hdr) + length < len) {
- wpa_printf(MSG_INFO, "EAPOL frame with %d extra bytes",
- (int) (len - sizeof(*hdr) - length));
+ if (tk == NULL && sta->pairwise_cipher == WPA_CIPHER_TKIP) {
+ if (data[3] & 0x1f) {
+ add_note(wt, MSG_INFO, "TKIP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(hdr->addr2));
+ }
+ if (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) {
+ add_note(wt, MSG_INFO, "CCMP frame from " MACSTR
+ " used non-zero reserved bit",
+ MAC2STR(hdr->addr2));
+ }
}
- p = (const u8 *) (hdr + 1);
- switch (hdr->type) {
- case IEEE802_1X_TYPE_EAP_PACKET:
- wpa_hexdump(MSG_MSGDUMP, "EAPOL - EAP packet", p, length);
- break;
- case IEEE802_1X_TYPE_EAPOL_START:
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Start", p, length);
- break;
- case IEEE802_1X_TYPE_EAPOL_LOGOFF:
- wpa_hexdump(MSG_MSGDUMP, "EAPOL-Logoff", p, length);
- break;
- case IEEE802_1X_TYPE_EAPOL_KEY:
- rx_data_eapol_key(wt, dst, src, p, length, prot);
- break;
- case IEEE802_1X_TYPE_EAPOL_ENCAPSULATED_ASF_ALERT:
- wpa_hexdump(MSG_MSGDUMP, "EAPOL - Encapsulated ASF alert",
- p, length);
- break;
- default:
- wpa_hexdump(MSG_MSGDUMP, "Unknown EAPOL payload", p, length);
- break;
+ keyid = data[3] >> 6;
+ if (keyid != 0) {
+ add_note(wt, MSG_INFO, "Unexpected non-zero KeyID %d in "
+ "individually addressed Data frame from " MACSTR,
+ keyid, MAC2STR(hdr->addr2));
}
-}
-
-
-static void rx_data_eth(struct wlantest *wt, const u8 *dst, const u8 *src,
- u16 ethertype, const u8 *data, size_t len, int prot)
-{
- if (ethertype == ETH_P_PAE)
- rx_data_eapol(wt, dst, src, data, len, prot);
-}
-
-static void rx_data_process(struct wlantest *wt, const u8 *dst, const u8 *src,
- const u8 *data, size_t len, int prot)
-{
- if (len >= 8 && os_memcmp(data, "\xaa\xaa\x03\x00\x00\x00", 6) == 0) {
- rx_data_eth(wt, dst, src, WPA_GET_BE16(data + 6),
- data + 8, len - 8, prot);
- return;
+ if (qos) {
+ tid = qos[0] & 0x0f;
+ 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)
+ rsc = sta->rsc_tods[tid];
+ else
+ rsc = sta->rsc_fromds[tid];
- wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? len : 7);
-}
+ 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) {
+ u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
+ add_note(wt, MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
+ " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u%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" : "");
+ wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
+ wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
+ }
-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)
-{
- /* TODO: Try to decrypt and if success, call rx_data_process() with
- * prot = 1 */
+skip_replay_det:
+ if (tk) {
+ if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
+ decrypted = ccmp_256_decrypt(tk, hdr, data, len, &dlen);
+ else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
+ sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
+ decrypted = gcmp_decrypt(tk, sta->tk_len, hdr, data,
+ len, &dlen);
+ else
+ decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
+ } else if (sta->pairwise_cipher == WPA_CIPHER_TKIP) {
+ decrypted = tkip_decrypt(sta->ptk.tk, hdr, data, len, &dlen);
+ } 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->tk_len,
+ hdr, data, len, &dlen);
+ else
+ decrypted = ccmp_decrypt(sta->ptk.tk, hdr, data, len,
+ &dlen);
+ } else {
+ decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
+ len, &dlen);
+ ptk_iter_done = 1;
+ }
+ if (!decrypted && !ptk_iter_done) {
+ decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
+ len, &dlen);
+ if (decrypted) {
+ add_note(wt, MSG_DEBUG, "Current PTK did not work, but found a match from all known PTKs");
+ }
+ }
+ 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;
+ os_memcpy(rsc, pn, 6);
+ rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
+ dlen, 1, peer_addr);
+ write_pcap_decrypted(wt, (const u8 *) hdr, 24 + (qos ? 2 : 0),
+ decrypted, dlen);
+ } else if (!try_ptk_iter)
+ add_note(wt, MSG_DEBUG, "Failed to decrypt frame");
+ os_free(decrypted);
}
if (prot)
rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
+ else {
+ const u8 *bssid, *sta_addr, *peer_addr;
+ struct wlantest_bss *bss;
+
+ if (fc & WLAN_FC_TODS) {
+ bssid = hdr->addr1;
+ sta_addr = hdr->addr2;
+ 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,
+ peer_addr);
+ }
+}
+
+
+static struct wlantest_tdls * get_tdls(struct wlantest *wt, const u8 *bssid,
+ const u8 *sta1_addr,
+ const u8 *sta2_addr)
+{
+ struct wlantest_bss *bss;
+ struct wlantest_sta *sta1, *sta2;
+ struct wlantest_tdls *tdls, *found = NULL;
+
+ bss = bss_find(wt, bssid);
+ if (bss == NULL)
+ return NULL;
+ sta1 = sta_find(bss, sta1_addr);
+ if (sta1 == NULL)
+ return NULL;
+ sta2 = sta_find(bss, sta2_addr);
+ if (sta2 == NULL)
+ return 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)) {
+ found = tdls;
+ if (tdls->link_up)
+ break;
+ }
+ }
+
+ return found;
+}
+
+
+static void add_direct_link(struct wlantest *wt, const u8 *bssid,
+ const u8 *sta1_addr, const u8 *sta2_addr)
+{
+ struct wlantest_tdls *tdls;
+
+ tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
+ if (tdls == NULL)
+ return;
+
+ if (tdls->link_up)
+ tdls->counters[WLANTEST_TDLS_COUNTER_VALID_DIRECT_LINK]++;
+ else
+ tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_DIRECT_LINK]++;
+}
+
+
+static void add_ap_path(struct wlantest *wt, const u8 *bssid,
+ const u8 *sta1_addr, const u8 *sta2_addr)
+{
+ struct wlantest_tdls *tdls;
+
+ tdls = get_tdls(wt, bssid, sta1_addr, sta2_addr);
+ if (tdls == NULL)
+ return;
+
+ if (tdls->link_up)
+ tdls->counters[WLANTEST_TDLS_COUNTER_INVALID_AP_PATH]++;
else
- rx_data_process(wt, dst, src, data, len, 0);
+ tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
}
fc & WLAN_FC_ISWEP ? " Prot" : "",
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,
+ data + hdrlen, len - hdrlen);
break;
case WLAN_FC_FROMDS:
wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s FromDS DA=" MACSTR
fc & WLAN_FC_ISWEP ? " Prot" : "",
MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
MAC2STR(hdr->addr3));
- rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
+ add_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
+ rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr3,
data + hdrlen, len - hdrlen);
break;
case WLAN_FC_TODS:
fc & WLAN_FC_ISWEP ? " Prot" : "",
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,
data + hdrlen, len - hdrlen);
break;
projects / mech_eap.git / blobdiff