aboutsummaryrefslogtreecommitdiffstats
path: root/wlantest/rx_data.c
diff options
context:
space:
mode:
Diffstat (limited to 'wlantest/rx_data.c')
-rw-r--r--wlantest/rx_data.c529
1 files changed, 0 insertions, 529 deletions
diff --git a/wlantest/rx_data.c b/wlantest/rx_data.c
deleted file mode 100644
index fea73cc..0000000
--- a/wlantest/rx_data.c
+++ /dev/null
@@ -1,529 +0,0 @@
-/*
- * Received Data frame processing
- * Copyright (c) 2010, Jouni Malinen <j@w1.fi>
- *
- * 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"
-#include "common/ieee802_11_defs.h"
-#include "wlantest.h"
-
-
-static const char * data_stype(u16 stype)
-{
- switch (stype) {
- case WLAN_FC_STYPE_DATA:
- return "DATA";
- case WLAN_FC_STYPE_DATA_CFACK:
- return "DATA-CFACK";
- case WLAN_FC_STYPE_DATA_CFPOLL:
- return "DATA-CFPOLL";
- case WLAN_FC_STYPE_DATA_CFACKPOLL:
- return "DATA-CFACKPOLL";
- case WLAN_FC_STYPE_NULLFUNC:
- return "NULLFUNC";
- case WLAN_FC_STYPE_CFACK:
- return "CFACK";
- case WLAN_FC_STYPE_CFPOLL:
- return "CFPOLL";
- case WLAN_FC_STYPE_CFACKPOLL:
- return "CFACKPOLL";
- case WLAN_FC_STYPE_QOS_DATA:
- return "QOSDATA";
- case WLAN_FC_STYPE_QOS_DATA_CFACK:
- return "QOSDATA-CFACK";
- case WLAN_FC_STYPE_QOS_DATA_CFPOLL:
- return "QOSDATA-CFPOLL";
- case WLAN_FC_STYPE_QOS_DATA_CFACKPOLL:
- return "QOSDATA-CFACKPOLL";
- case WLAN_FC_STYPE_QOS_NULL:
- return "QOS-NULL";
- case WLAN_FC_STYPE_QOS_CFPOLL:
- return "QOS-CFPOLL";
- case WLAN_FC_STYPE_QOS_CFACKPOLL:
- return "QOS-CFACKPOLL";
- }
- return "??";
-}
-
-
-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);
- 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_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)
-{
- 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;
- }
-
- wpa_hexdump(MSG_DEBUG, "Unrecognized LLC", data, len > 8 ? 8 : len);
-}
-
-
-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)
-{
- struct wlantest_bss *bss;
- int keyid;
- u8 *decrypted;
- size_t dlen;
- u8 pn[6];
-
- bss = bss_get(wt, hdr->addr2);
- if (bss == NULL)
- return;
- if (len < 4) {
- wpa_printf(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;
- }
-
- 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));
- }
- 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);
- }
- } 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));
- }
- }
-
- keyid = data[3] >> 6;
- if (bss->gtk_len[keyid] == 0 && bss->group_cipher != WPA_CIPHER_WEP40)
- {
- wpa_printf(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));
- 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 if (bss->group_cipher == WPA_CIPHER_WEP40)
- decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
- else
- decrypted = ccmp_decrypt(bss->gtk[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);
- }
- 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;
- const u8 *tk = NULL;
-
- if (hdr->addr1[0] & 0x01) {
- rx_data_bss_prot_group(wt, hdr, qos, dst, src, data, len);
- return;
- }
-
- 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 {
- 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;
- 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;
- }
- }
- }
- if ((sta == NULL ||
- (!sta->ptk_set && sta->pairwise_cipher != WPA_CIPHER_WEP40)) &&
- tk == NULL) {
- wpa_printf(MSG_MSGDUMP, "No PTK known to decrypt the frame");
- return;
- }
-
- if (len < 4) {
- wpa_printf(MSG_INFO, "Too short encrypted data frame");
- 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;
- }
-
- 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));
- }
- 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);
- }
- } 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));
- }
- }
-
- 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 (qos)
- tid = qos[0] & 0x0f;
- else
- tid = 0;
- 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];
-
-
- 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));
- wpa_hexdump(MSG_INFO, "RX PN", pn, 6);
- wpa_hexdump(MSG_INFO, "RSC", rsc, 6);
- }
-
-skip_replay_det:
- 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 if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
- decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
- else
- decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
- 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);
- }
- 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)
-{
- u16 fc = le_to_host16(hdr->frame_control);
- int prot = !!(fc & WLAN_FC_ISWEP);
-
- if (qos) {
- u8 ack = (qos[0] & 0x60) >> 5;
- wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
- " len=%u%s tid=%u%s%s",
- MAC2STR(src), MAC2STR(dst), (unsigned int) len,
- prot ? " Prot" : "", qos[0] & 0x0f,
- (qos[0] & 0x10) ? " EOSP" : "",
- ack == 0 ? "" :
- (ack == 1 ? " NoAck" :
- (ack == 2 ? " NoExpAck" : " BA")));
- } else {
- wpa_printf(MSG_MSGDUMP, "BSS DATA: " MACSTR " -> " MACSTR
- " len=%u%s",
- MAC2STR(src), MAC2STR(dst), (unsigned int) len,
- prot ? " Prot" : "");
- }
-
- if (prot)
- rx_data_bss_prot(wt, hdr, qos, dst, src, data, len);
- else {
- const u8 *bssid, *sta_addr, *peer_addr;
- 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;
- }
- 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;
-
- 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))
- return tdls;
- }
-
- return NULL;
-}
-
-
-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
- tdls->counters[WLANTEST_TDLS_COUNTER_VALID_AP_PATH]++;
-}
-
-
-void rx_data(struct wlantest *wt, const u8 *data, size_t len)
-{
- const struct ieee80211_hdr *hdr;
- u16 fc, stype;
- size_t hdrlen;
- const u8 *qos = NULL;
-
- if (len < 24)
- return;
-
- hdr = (const struct ieee80211_hdr *) data;
- fc = le_to_host16(hdr->frame_control);
- stype = WLAN_FC_GET_STYPE(fc);
- hdrlen = 24;
- if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
- (WLAN_FC_TODS | WLAN_FC_FROMDS))
- hdrlen += ETH_ALEN;
- if (stype & 0x08) {
- qos = data + hdrlen;
- hdrlen += 2;
- }
- if (len < hdrlen)
- return;
- wt->rx_data++;
-
- switch (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) {
- case 0:
- wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s IBSS DA=" MACSTR " SA="
- MACSTR " BSSID=" MACSTR,
- data_stype(WLAN_FC_GET_STYPE(fc)),
- fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
- 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
- " BSSID=" MACSTR " SA=" MACSTR,
- data_stype(WLAN_FC_GET_STYPE(fc)),
- fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
- fc & WLAN_FC_ISWEP ? " Prot" : "",
- 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->addr3,
- data + hdrlen, len - hdrlen);
- break;
- case WLAN_FC_TODS:
- wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s ToDS BSSID=" MACSTR
- " SA=" MACSTR " DA=" MACSTR,
- data_stype(WLAN_FC_GET_STYPE(fc)),
- fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
- 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;
- case WLAN_FC_TODS | WLAN_FC_FROMDS:
- wpa_printf(MSG_EXCESSIVE, "DATA %s%s%s WDS RA=" MACSTR " TA="
- MACSTR " DA=" MACSTR " SA=" MACSTR,
- data_stype(WLAN_FC_GET_STYPE(fc)),
- fc & WLAN_FC_PWRMGT ? " PwrMgt" : "",
- fc & WLAN_FC_ISWEP ? " Prot" : "",
- MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
- MAC2STR(hdr->addr3),
- MAC2STR((const u8 *) (hdr + 1)));
- break;
- }
-}