/*
* 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)
{
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);
+ 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);
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 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)
+{
+ 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;
+
+ return NULL;
+}
+
+
static void rx_data_bss_prot_group(struct wlantest *wt,
const struct ieee80211_hdr *hdr,
const u8 *qos, const u8 *dst, const u8 *src,
{
struct wlantest_bss *bss;
int keyid;
- u8 *decrypted;
+ u8 *decrypted = NULL;
size_t dlen;
u8 pn[6];
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));
}
}
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) {
u16 seq_ctrl = le_to_host16(hdr->seq_ctrl);
- wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
- " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
- MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
- MAC2STR(hdr->addr3),
- WLAN_GET_SEQ_SEQ(seq_ctrl),
- WLAN_GET_SEQ_FRAG(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);
}
+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) {
rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
- dlen, 1);
+ 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);
}
size_t dlen;
int tid;
u8 pn[6], *rsc;
- struct wlantest_tdls *tdls = NULL;
+ 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);
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;
+ 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;
}
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));
+ add_note(wt, MSG_INFO, "Unexpected non-zero 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];
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);
- wpa_printf(MSG_INFO, "CCMP/TKIP replay detected: A1=" MACSTR
- " A2=" MACSTR " A3=" MACSTR " seq=%u frag=%u",
- MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
- MAC2STR(hdr->addr3),
- WLAN_GET_SEQ_SEQ(seq_ctrl),
- WLAN_GET_SEQ_FRAG(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);
}
- 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);
+ 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) {
- rx_data_process(wt, bss->bssid, sta->addr, dst, src, decrypted,
- dlen, 1);
+ 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;
+ 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_ap_path(wt, hdr->addr2, hdr->addr1, hdr->addr3);
- rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr2,
+ rx_data_bss(wt, hdr, qos, hdr->addr1, hdr->addr3,
data + hdrlen, len - hdrlen);
break;
case WLAN_FC_TODS:
projects / mech_eap.git / blobdiff