wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/wpa_supplicant/ibss_rsn.c b/wpa_supplicant/ibss_rsn.c
new file mode 100644
index 0000000..0d7d568
--- /dev/null
+++ b/wpa_supplicant/ibss_rsn.c
@@ -0,0 +1,604 @@
+/*
+ * wpa_supplicant - IBSS RSN
+ * Copyright (c) 2009, 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.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "l2_packet/l2_packet.h"
+#include "rsn_supp/wpa.h"
+#include "rsn_supp/wpa_ie.h"
+#include "ap/wpa_auth.h"
+#include "wpa_supplicant_i.h"
+#include "driver_i.h"
+#include "ibss_rsn.h"
+
+
+static void ibss_rsn_free(struct ibss_rsn_peer *peer)
+{
+ wpa_auth_sta_deinit(peer->auth);
+ wpa_sm_deinit(peer->supp);
+ os_free(peer);
+}
+
+
+static void supp_set_state(void *ctx, enum wpa_states state)
+{
+ struct ibss_rsn_peer *peer = ctx;
+ peer->supp_state = state;
+}
+
+
+static enum wpa_states supp_get_state(void *ctx)
+{
+ struct ibss_rsn_peer *peer = ctx;
+ return peer->supp_state;
+}
+
+
+static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
+ size_t len)
+{
+ struct ibss_rsn_peer *peer = ctx;
+ struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
+
+ wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
+ "len=%lu)",
+ __func__, MAC2STR(dest), proto, (unsigned long) len);
+
+ if (wpa_s->l2)
+ return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
+
+ return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
+}
+
+
+static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
+ u16 data_len, size_t *msg_len, void **data_pos)
+{
+ struct ieee802_1x_hdr *hdr;
+
+ wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
+ __func__, type, data_len);
+
+ *msg_len = sizeof(*hdr) + data_len;
+ hdr = os_malloc(*msg_len);
+ if (hdr == NULL)
+ return NULL;
+
+ hdr->version = 2;
+ hdr->type = type;
+ hdr->length = host_to_be16(data_len);
+
+ if (data)
+ os_memcpy(hdr + 1, data, data_len);
+ else
+ os_memset(hdr + 1, 0, data_len);
+
+ if (data_pos)
+ *data_pos = hdr + 1;
+
+ return (u8 *) hdr;
+}
+
+
+static int supp_get_beacon_ie(void *ctx)
+{
+ struct ibss_rsn_peer *peer = ctx;
+
+ wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
+ /* TODO: get correct RSN IE */
+ return wpa_sm_set_ap_rsn_ie(peer->supp,
+ (u8 *) "\x30\x14\x01\x00"
+ "\x00\x0f\xac\x04"
+ "\x01\x00\x00\x0f\xac\x04"
+ "\x01\x00\x00\x0f\xac\x02"
+ "\x00\x00", 22);
+}
+
+
+static int supp_set_key(void *ctx, enum wpa_alg alg,
+ const u8 *addr, int key_idx, int set_tx,
+ const u8 *seq, size_t seq_len,
+ const u8 *key, size_t key_len)
+{
+ struct ibss_rsn_peer *peer = ctx;
+
+ wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
+ "set_tx=%d)",
+ __func__, alg, MAC2STR(addr), key_idx, set_tx);
+ wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
+ wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
+
+ if (key_idx == 0) {
+ /*
+ * In IBSS RSN, the pairwise key from the 4-way handshake
+ * initiated by the peer with highest MAC address is used.
+ */
+ if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
+ ETH_ALEN) > 0) {
+ wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
+ return 0;
+ }
+ }
+
+ if (is_broadcast_ether_addr(addr))
+ addr = peer->addr;
+ return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
+ set_tx, seq, seq_len, key, key_len);
+}
+
+
+static void * supp_get_network_ctx(void *ctx)
+{
+ struct ibss_rsn_peer *peer = ctx;
+ return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
+}
+
+
+static int supp_mlme_setprotection(void *ctx, const u8 *addr,
+ int protection_type, int key_type)
+{
+ wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
+ "key_type=%d)",
+ __func__, MAC2STR(addr), protection_type, key_type);
+ return 0;
+}
+
+
+static void supp_cancel_auth_timeout(void *ctx)
+{
+ wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
+}
+
+
+static void supp_deauthenticate(void * ctx, int reason_code)
+{
+ wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
+}
+
+
+int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
+ const u8 *psk)
+{
+ struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return -1;
+
+ ctx->ctx = peer;
+ ctx->msg_ctx = peer->ibss_rsn->wpa_s;
+ ctx->set_state = supp_set_state;
+ ctx->get_state = supp_get_state;
+ ctx->ether_send = supp_ether_send;
+ ctx->get_beacon_ie = supp_get_beacon_ie;
+ ctx->alloc_eapol = supp_alloc_eapol;
+ ctx->set_key = supp_set_key;
+ ctx->get_network_ctx = supp_get_network_ctx;
+ ctx->mlme_setprotection = supp_mlme_setprotection;
+ ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
+ ctx->deauthenticate = supp_deauthenticate;
+ peer->supp = wpa_sm_init(ctx);
+ if (peer->supp == NULL) {
+ wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
+ return -1;
+ }
+
+ wpa_sm_set_own_addr(peer->supp, own_addr);
+ wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
+ wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
+ wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
+ wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
+ wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
+ wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);
+
+ peer->supp_ie_len = sizeof(peer->supp_ie);
+ if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
+ &peer->supp_ie_len) < 0) {
+ wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
+ " failed");
+ return -1;
+ }
+
+ wpa_sm_notify_assoc(peer->supp, peer->addr);
+
+ return 0;
+}
+
+
+static void auth_logger(void *ctx, const u8 *addr, logger_level level,
+ const char *txt)
+{
+ if (addr)
+ wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
+ MAC2STR(addr), txt);
+ else
+ wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
+}
+
+
+static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
+{
+ struct ibss_rsn *ibss_rsn = ctx;
+ wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
+ __func__, MAC2STR(addr), prev_psk);
+ if (prev_psk)
+ return NULL;
+ return ibss_rsn->psk;
+}
+
+
+static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
+ size_t data_len, int encrypt)
+{
+ struct ibss_rsn *ibss_rsn = ctx;
+ struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
+
+ wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
+ "encrypt=%d)",
+ __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
+
+ if (wpa_s->l2)
+ return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
+ data_len);
+
+ return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
+}
+
+
+static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
+ const u8 *addr, int idx, u8 *key, size_t key_len)
+{
+ struct ibss_rsn *ibss_rsn = ctx;
+ u8 seq[6];
+
+ os_memset(seq, 0, sizeof(seq));
+
+ if (addr) {
+ wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
+ " key_idx=%d)",
+ __func__, alg, MAC2STR(addr), idx);
+ } else {
+ wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
+ __func__, alg, idx);
+ }
+ wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
+
+ if (idx == 0) {
+ /*
+ * In IBSS RSN, the pairwise key from the 4-way handshake
+ * initiated by the peer with highest MAC address is used.
+ */
+ if (addr == NULL ||
+ os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
+ wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
+ return 0;
+ }
+ }
+
+ return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
+ 1, seq, 6, key, key_len);
+}
+
+
+static int auth_for_each_sta(void *ctx, int (*cb)(struct wpa_state_machine *sm,
+ void *ctx),
+ void *cb_ctx)
+{
+ struct ibss_rsn *ibss_rsn = ctx;
+ struct ibss_rsn_peer *peer;
+
+ wpa_printf(MSG_DEBUG, "AUTH: for_each_sta");
+
+ for (peer = ibss_rsn->peers; peer; peer = peer->next) {
+ if (peer->auth && cb(peer->auth, cb_ctx))
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
+ const u8 *own_addr)
+{
+ struct wpa_auth_config conf;
+ struct wpa_auth_callbacks cb;
+
+ wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
+
+ os_memset(&conf, 0, sizeof(conf));
+ conf.wpa = 2;
+ conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
+ conf.wpa_pairwise = WPA_CIPHER_CCMP;
+ conf.rsn_pairwise = WPA_CIPHER_CCMP;
+ conf.wpa_group = WPA_CIPHER_CCMP;
+ conf.eapol_version = 2;
+ conf.wpa_group_rekey = 600;
+
+ os_memset(&cb, 0, sizeof(cb));
+ cb.ctx = ibss_rsn;
+ cb.logger = auth_logger;
+ cb.send_eapol = auth_send_eapol;
+ cb.get_psk = auth_get_psk;
+ cb.set_key = auth_set_key;
+ cb.for_each_sta = auth_for_each_sta;
+
+ ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
+ if (ibss_rsn->auth_group == NULL) {
+ wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
+ struct ibss_rsn_peer *peer)
+{
+ peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
+ if (peer->auth == NULL) {
+ wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
+ return -1;
+ }
+
+ /* TODO: get peer RSN IE with Probe Request */
+ if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
+ (u8 *) "\x30\x14\x01\x00"
+ "\x00\x0f\xac\x04"
+ "\x01\x00\x00\x0f\xac\x04"
+ "\x01\x00\x00\x0f\xac\x02"
+ "\x00\x00", 22, NULL, 0) !=
+ WPA_IE_OK) {
+ wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
+ return -1;
+ }
+
+ if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
+ return -1;
+
+ if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
+ return -1;
+
+ return 0;
+}
+
+
+int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
+{
+ struct ibss_rsn_peer *peer;
+
+ if (ibss_rsn == NULL)
+ return -1;
+
+ for (peer = ibss_rsn->peers; peer; peer = peer->next) {
+ if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0) {
+ wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator and "
+ "Supplicant for peer " MACSTR " already "
+ "running", MAC2STR(addr));
+ return 0;
+ }
+ }
+
+ wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
+ "Supplicant for peer " MACSTR, MAC2STR(addr));
+
+ peer = os_zalloc(sizeof(*peer));
+ if (peer == NULL)
+ return -1;
+
+ peer->ibss_rsn = ibss_rsn;
+ os_memcpy(peer->addr, addr, ETH_ALEN);
+
+ if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
+ < 0) {
+ ibss_rsn_free(peer);
+ return -1;
+ }
+
+ if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
+ ibss_rsn_free(peer);
+ return -1;
+ }
+
+ peer->next = ibss_rsn->peers;
+ ibss_rsn->peers = peer;
+
+ return 0;
+}
+
+
+void ibss_rsn_stop(struct ibss_rsn *ibss_rsn, const u8 *peermac)
+{
+ struct ibss_rsn_peer *peer, *prev;
+
+ if (ibss_rsn == NULL)
+ return;
+
+ if (peermac == NULL) {
+ /* remove all peers */
+ wpa_printf(MSG_DEBUG, "%s: Remove all peers", __func__);
+ peer = ibss_rsn->peers;
+ while (peer) {
+ prev = peer;
+ peer = peer->next;
+ ibss_rsn_free(prev);
+ ibss_rsn->peers = peer;
+ }
+ } else {
+ /* remove specific peer */
+ wpa_printf(MSG_DEBUG, "%s: Remove specific peer " MACSTR,
+ __func__, MAC2STR(peermac));
+
+ for (prev = NULL, peer = ibss_rsn->peers; peer != NULL;
+ prev = peer, peer = peer->next) {
+ if (os_memcmp(peermac, peer->addr, ETH_ALEN) == 0) {
+ if (prev == NULL)
+ ibss_rsn->peers = peer->next;
+ else
+ prev->next = peer->next;
+ ibss_rsn_free(peer);
+ wpa_printf(MSG_DEBUG, "%s: Successfully "
+ "removed a specific peer",
+ __func__);
+ break;
+ }
+ }
+ }
+}
+
+
+struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
+{
+ struct ibss_rsn *ibss_rsn;
+
+ ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
+ if (ibss_rsn == NULL)
+ return NULL;
+ ibss_rsn->wpa_s = wpa_s;
+
+ if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
+ ibss_rsn_deinit(ibss_rsn);
+ return NULL;
+ }
+
+ return ibss_rsn;
+}
+
+
+void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
+{
+ struct ibss_rsn_peer *peer, *prev;
+
+ if (ibss_rsn == NULL)
+ return;
+
+ peer = ibss_rsn->peers;
+ while (peer) {
+ prev = peer;
+ peer = peer->next;
+ ibss_rsn_free(prev);
+ }
+
+ wpa_deinit(ibss_rsn->auth_group);
+ os_free(ibss_rsn);
+
+}
+
+
+static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
+{
+ const struct ieee802_1x_hdr *hdr;
+ const struct wpa_eapol_key *key;
+ u16 key_info;
+ size_t plen;
+
+ /* TODO: Support other EAPOL packets than just EAPOL-Key */
+
+ if (len < sizeof(*hdr) + sizeof(*key))
+ return -1;
+
+ hdr = (const struct ieee802_1x_hdr *) buf;
+ key = (const struct wpa_eapol_key *) (hdr + 1);
+ plen = be_to_host16(hdr->length);
+
+ if (hdr->version < EAPOL_VERSION) {
+ /* TODO: backwards compatibility */
+ }
+ if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
+ wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
+ "not a Key frame", hdr->type);
+ return -1;
+ }
+ if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
+ wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
+ "invalid (frame size %lu)",
+ (unsigned long) plen, (unsigned long) len);
+ return -1;
+ }
+
+ if (key->type != EAPOL_KEY_TYPE_RSN) {
+ wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
+ "discarded", key->type);
+ return -1;
+ }
+
+ key_info = WPA_GET_BE16(key->key_info);
+
+ return !!(key_info & WPA_KEY_INFO_ACK);
+}
+
+
+static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
+ struct ibss_rsn_peer *peer,
+ const u8 *buf, size_t len)
+{
+ int supp;
+ u8 *tmp;
+
+ supp = ibss_rsn_eapol_dst_supp(buf, len);
+ if (supp < 0)
+ return -1;
+
+ tmp = os_malloc(len);
+ if (tmp == NULL)
+ return -1;
+ os_memcpy(tmp, buf, len);
+ if (supp) {
+ wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
+ wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
+ } else {
+ wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
+ wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
+ }
+ os_free(tmp);
+
+ return 1;
+}
+
+
+int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
+ const u8 *buf, size_t len)
+{
+ struct ibss_rsn_peer *peer;
+
+ if (ibss_rsn == NULL)
+ return -1;
+
+ for (peer = ibss_rsn->peers; peer; peer = peer->next) {
+ if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
+ return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
+ buf, len);
+ }
+
+ if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
+ /*
+ * Create new IBSS peer based on an EAPOL message from the peer
+ * Authenticator.
+ */
+ if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
+ return -1;
+ return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
+ buf, len);
+ }
+
+ return 0;
+}
+
+
+void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
+{
+ if (ibss_rsn == NULL)
+ return;
+ os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
+}