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/*
* BSS list
* 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 "utils/common.h"
#include "common/defs.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "crypto/sha1.h"
#include "wlantest.h"
struct wlantest_bss * bss_find(struct wlantest *wt, const u8 *bssid)
{
struct wlantest_bss *bss;
dl_list_for_each(bss, &wt->bss, struct wlantest_bss, list) {
if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
return bss;
}
return NULL;
}
struct wlantest_bss * bss_get(struct wlantest *wt, const u8 *bssid)
{
struct wlantest_bss *bss;
if (bssid[0] & 0x01)
return NULL; /* Skip group addressed frames */
bss = bss_find(wt, bssid);
if (bss)
return bss;
bss = os_zalloc(sizeof(*bss));
if (bss == NULL)
return NULL;
dl_list_init(&bss->sta);
dl_list_init(&bss->pmk);
dl_list_init(&bss->tdls);
os_memcpy(bss->bssid, bssid, ETH_ALEN);
dl_list_add(&wt->bss, &bss->list);
wpa_printf(MSG_DEBUG, "Discovered new BSS - " MACSTR,
MAC2STR(bss->bssid));
return bss;
}
void pmk_deinit(struct wlantest_pmk *pmk)
{
dl_list_del(&pmk->list);
os_free(pmk);
}
void tdls_deinit(struct wlantest_tdls *tdls)
{
dl_list_del(&tdls->list);
os_free(tdls);
}
void bss_deinit(struct wlantest_bss *bss)
{
struct wlantest_sta *sta, *n;
struct wlantest_pmk *pmk, *np;
struct wlantest_tdls *tdls, *nt;
dl_list_for_each_safe(sta, n, &bss->sta, struct wlantest_sta, list)
sta_deinit(sta);
dl_list_for_each_safe(pmk, np, &bss->pmk, struct wlantest_pmk, list)
pmk_deinit(pmk);
dl_list_for_each_safe(tdls, nt, &bss->tdls, struct wlantest_tdls, list)
tdls_deinit(tdls);
dl_list_del(&bss->list);
os_free(bss);
}
int bss_add_pmk_from_passphrase(struct wlantest_bss *bss,
const char *passphrase)
{
struct wlantest_pmk *pmk;
pmk = os_zalloc(sizeof(*pmk));
if (pmk == NULL)
return -1;
if (pbkdf2_sha1(passphrase, (char *) bss->ssid, bss->ssid_len, 4096,
pmk->pmk, sizeof(pmk->pmk)) < 0) {
os_free(pmk);
return -1;
}
wpa_printf(MSG_INFO, "Add possible PMK for BSSID " MACSTR
" based on passphrase '%s'",
MAC2STR(bss->bssid), passphrase);
wpa_hexdump(MSG_DEBUG, "Possible PMK", pmk->pmk, sizeof(pmk->pmk));
dl_list_add(&bss->pmk, &pmk->list);
return 0;
}
static void bss_add_pmk(struct wlantest *wt, struct wlantest_bss *bss)
{
struct wlantest_passphrase *p;
dl_list_for_each(p, &wt->passphrase, struct wlantest_passphrase, list)
{
if (!is_zero_ether_addr(p->bssid) &&
os_memcmp(p->bssid, bss->bssid, ETH_ALEN) != 0)
continue;
if (p->ssid_len &&
(p->ssid_len != bss->ssid_len ||
os_memcmp(p->ssid, bss->ssid, p->ssid_len) != 0))
continue;
if (bss_add_pmk_from_passphrase(bss, p->passphrase) < 0)
break;
}
}
void bss_update(struct wlantest *wt, struct wlantest_bss *bss,
struct ieee802_11_elems *elems)
{
struct wpa_ie_data data;
int update = 0;
if (bss->capab_info != bss->prev_capab_info)
update = 1;
if (elems->ssid == NULL || elems->ssid_len > 32) {
wpa_printf(MSG_INFO, "Invalid or missing SSID in a Beacon "
"frame for " MACSTR, MAC2STR(bss->bssid));
bss->parse_error_reported = 1;
return;
}
if (bss->ssid_len != elems->ssid_len ||
os_memcmp(bss->ssid, elems->ssid, bss->ssid_len) != 0) {
wpa_printf(MSG_DEBUG, "Store SSID '%s' for BSSID " MACSTR,
wpa_ssid_txt(elems->ssid, elems->ssid_len),
MAC2STR(bss->bssid));
os_memcpy(bss->ssid, elems->ssid, elems->ssid_len);
bss->ssid_len = elems->ssid_len;
bss_add_pmk(wt, bss);
}
if (elems->rsn_ie == NULL) {
if (bss->rsnie[0]) {
wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE removed",
MAC2STR(bss->bssid));
bss->rsnie[0] = 0;
update = 1;
}
} else {
if (bss->rsnie[0] == 0 ||
os_memcmp(bss->rsnie, elems->rsn_ie - 2,
elems->rsn_ie_len + 2) != 0) {
wpa_printf(MSG_INFO, "BSS " MACSTR " - RSN IE "
"stored", MAC2STR(bss->bssid));
wpa_hexdump(MSG_DEBUG, "RSN IE", elems->rsn_ie - 2,
elems->rsn_ie_len + 2);
update = 1;
}
os_memcpy(bss->rsnie, elems->rsn_ie - 2,
elems->rsn_ie_len + 2);
}
if (elems->wpa_ie == NULL) {
if (bss->wpaie[0]) {
wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE removed",
MAC2STR(bss->bssid));
bss->wpaie[0] = 0;
update = 1;
}
} else {
if (bss->wpaie[0] == 0 ||
os_memcmp(bss->wpaie, elems->wpa_ie - 2,
elems->wpa_ie_len + 2) != 0) {
wpa_printf(MSG_INFO, "BSS " MACSTR " - WPA IE "
"stored", MAC2STR(bss->bssid));
wpa_hexdump(MSG_DEBUG, "WPA IE", elems->wpa_ie - 2,
elems->wpa_ie_len + 2);
update = 1;
}
os_memcpy(bss->wpaie, elems->wpa_ie - 2,
elems->wpa_ie_len + 2);
}
if (!update)
return;
bss->prev_capab_info = bss->capab_info;
bss->proto = 0;
bss->pairwise_cipher = 0;
bss->group_cipher = 0;
bss->key_mgmt = 0;
bss->rsn_capab = 0;
bss->mgmt_group_cipher = 0;
if (bss->wpaie[0]) {
if (wpa_parse_wpa_ie_wpa(bss->wpaie, 2 + bss->wpaie[1], &data)
< 0) {
wpa_printf(MSG_INFO, "Failed to parse WPA IE from "
MACSTR, MAC2STR(bss->bssid));
} else {
bss->proto |= data.proto;
bss->pairwise_cipher |= data.pairwise_cipher;
bss->group_cipher |= data.group_cipher;
bss->key_mgmt |= data.key_mgmt;
bss->rsn_capab = data.capabilities;
bss->mgmt_group_cipher |= data.mgmt_group_cipher;
}
}
if (bss->rsnie[0]) {
if (wpa_parse_wpa_ie_rsn(bss->rsnie, 2 + bss->rsnie[1], &data)
< 0) {
wpa_printf(MSG_INFO, "Failed to parse RSN IE from "
MACSTR, MAC2STR(bss->bssid));
} else {
bss->proto |= data.proto;
bss->pairwise_cipher |= data.pairwise_cipher;
bss->group_cipher |= data.group_cipher;
bss->key_mgmt |= data.key_mgmt;
bss->rsn_capab = data.capabilities;
bss->mgmt_group_cipher |= data.mgmt_group_cipher;
}
}
if (!(bss->proto & WPA_PROTO_RSN) ||
!(bss->rsn_capab & WPA_CAPABILITY_MFPC))
bss->mgmt_group_cipher = 0;
if (!bss->wpaie[0] && !bss->rsnie[0] &&
(bss->capab_info & WLAN_CAPABILITY_PRIVACY))
bss->group_cipher = WPA_CIPHER_WEP40;
wpa_printf(MSG_INFO, "BSS " MACSTR
" proto=%s%s%s"
"pairwise=%s%s%s%s"
"group=%s%s%s%s%s%s"
"mgmt_group_cipher=%s"
"key_mgmt=%s%s%s%s%s%s%s%s"
"rsn_capab=%s%s%s%s%s",
MAC2STR(bss->bssid),
bss->proto == 0 ? "OPEN " : "",
bss->proto & WPA_PROTO_WPA ? "WPA " : "",
bss->proto & WPA_PROTO_RSN ? "WPA2 " : "",
bss->pairwise_cipher == 0 ? "N/A " : "",
bss->pairwise_cipher & WPA_CIPHER_NONE ? "NONE " : "",
bss->pairwise_cipher & WPA_CIPHER_TKIP ? "TKIP " : "",
bss->pairwise_cipher & WPA_CIPHER_CCMP ? "CCMP " : "",
bss->group_cipher == 0 ? "N/A " : "",
bss->group_cipher & WPA_CIPHER_NONE ? "NONE " : "",
bss->group_cipher & WPA_CIPHER_WEP40 ? "WEP40 " : "",
bss->group_cipher & WPA_CIPHER_WEP104 ? "WEP104 " : "",
bss->group_cipher & WPA_CIPHER_TKIP ? "TKIP " : "",
bss->group_cipher & WPA_CIPHER_CCMP ? "CCMP " : "",
bss->mgmt_group_cipher & WPA_CIPHER_AES_128_CMAC ? "BIP " :
"N/A ",
bss->key_mgmt == 0 ? "N/A " : "",
bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X ? "EAP " : "",
bss->key_mgmt & WPA_KEY_MGMT_PSK ? "PSK " : "",
bss->key_mgmt & WPA_KEY_MGMT_WPA_NONE ? "WPA-NONE " : "",
bss->key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X ? "FT-EAP " : "",
bss->key_mgmt & WPA_KEY_MGMT_FT_PSK ? "FT-PSK " : "",
bss->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256 ?
"EAP-SHA256 " : "",
bss->key_mgmt & WPA_KEY_MGMT_PSK_SHA256 ?
"PSK-SHA256 " : "",
bss->rsn_capab & WPA_CAPABILITY_PREAUTH ? "PREAUTH " : "",
bss->rsn_capab & WPA_CAPABILITY_NO_PAIRWISE ?
"NO_PAIRWISE " : "",
bss->rsn_capab & WPA_CAPABILITY_MFPR ? "MFPR " : "",
bss->rsn_capab & WPA_CAPABILITY_MFPC ? "MFPC " : "",
bss->rsn_capab & WPA_CAPABILITY_PEERKEY_ENABLED ?
"PEERKEY " : "");
}
void bss_flush(struct wlantest *wt)
{
struct wlantest_bss *bss, *n;
dl_list_for_each_safe(bss, n, &wt->bss, struct wlantest_bss, list)
bss_deinit(bss);
}
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