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-rw-r--r--wpa_supplicant/ibss_rsn.c319
1 files changed, 319 insertions, 0 deletions
diff --git a/wpa_supplicant/ibss_rsn.c b/wpa_supplicant/ibss_rsn.c
new file mode 100644
index 0000000..691a84e
--- /dev/null
+++ b/wpa_supplicant/ibss_rsn.c
@@ -0,0 +1,319 @@
+/*
+ * 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 "wpa_supplicant_i.h"
+#include "wpa.h"
+#include "wpa_ie.h"
+#include "../hostapd/wpa.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 int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
+ size_t len)
+{
+ /* struct ibss_rsn_peer *peer = ctx; */
+
+ wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
+ "len=%lu)",
+ __func__, MAC2STR(dest), proto, (unsigned long) len);
+
+ /* TODO: send EAPOL frame */
+
+ return 0;
+}
+
+
+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)
+{
+ wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
+ /* TODO */
+ return -1;
+}
+
+
+static int supp_set_key(void *ctx, 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)
+{
+ 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(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
+ return 0;
+}
+
+
+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__);
+}
+
+
+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->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->mlme_setprotection = supp_mlme_setprotection;
+ ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
+ 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);
+
+#if 0 /* TODO? */
+ 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;
+ }
+#endif
+
+ 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; */
+
+ wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
+ "encrypt=%d)",
+ __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
+
+ /* TODO: send EAPOL frame */
+
+ 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;
+
+ 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;
+
+ 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;
+ }
+
+#if 0 /* TODO: get peer RSN IE with Probe Request */
+ if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth, PEER_IE,
+ PEER_IE_LEN, NULL, 0) != WPA_IE_OK) {
+ wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
+ return -1;
+ }
+#endif
+
+ wpa_auth_sm_event(peer->auth, WPA_ASSOC);
+
+ wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth);
+
+ return 0;
+}
+
+
+int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
+{
+ struct ibss_rsn_peer *peer;
+
+ 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;
+
+ 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;
+}
+
+
+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);
+
+}