diff options
author | sam <sam@FreeBSD.org> | 2006-03-07 05:26:33 +0000 |
---|---|---|
committer | sam <sam@FreeBSD.org> | 2006-03-07 05:26:33 +0000 |
commit | 840099f34d8de1ca769f02fae379c4d8e5d6688a (patch) | |
tree | 0c0ff34569d807e7bceb062a6210ce68490a8764 /contrib/wpa_supplicant/events.c | |
parent | 34dbcde8dfa5b3d152d250b6d69965e001238e49 (diff) | |
download | FreeBSD-src-840099f34d8de1ca769f02fae379c4d8e5d6688a.zip FreeBSD-src-840099f34d8de1ca769f02fae379c4d8e5d6688a.tar.gz |
Import of WPA supplicant 0.4.8
Diffstat (limited to 'contrib/wpa_supplicant/events.c')
-rw-r--r-- | contrib/wpa_supplicant/events.c | 759 |
1 files changed, 759 insertions, 0 deletions
diff --git a/contrib/wpa_supplicant/events.c b/contrib/wpa_supplicant/events.c new file mode 100644 index 0000000..d8762e9 --- /dev/null +++ b/contrib/wpa_supplicant/events.c @@ -0,0 +1,759 @@ +/* + * WPA Supplicant - Driver event processing + * Copyright (c) 2003-2006, Jouni Malinen <jkmaline@cc.hut.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 <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <time.h> + +#include "common.h" +#include "eapol_sm.h" +#include "wpa.h" +#include "eloop.h" +#include "wpa_supplicant.h" +#include "config.h" +#include "l2_packet.h" +#include "wpa_supplicant_i.h" +#include "pcsc_funcs.h" +#include "preauth.h" +#include "wpa_ctrl.h" +#include "eap.h" + + +static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s) +{ + struct wpa_ssid *ssid; + + if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid) + return 0; + + ssid = wpa_supplicant_get_ssid(wpa_s); + if (ssid == NULL) { + wpa_printf(MSG_INFO, "No network configuration found for the " + "current AP"); + return -1; + } + + if (ssid->disabled) { + wpa_printf(MSG_DEBUG, "Selected network is disabled"); + return -1; + } + + wpa_printf(MSG_DEBUG, "Network configuration found for the current " + "AP"); + if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X | + WPA_KEY_MGMT_WPA_NONE)) { + u8 wpa_ie[80]; + size_t wpa_ie_len = sizeof(wpa_ie); + wpa_supplicant_set_suites(wpa_s, NULL, ssid, + wpa_ie, &wpa_ie_len); + } else { + wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); + } + + wpa_s->current_ssid = ssid; + wpa_sm_set_config(wpa_s->wpa, wpa_s->current_ssid); + wpa_supplicant_initiate_eapol(wpa_s); + + return 0; +} + + +static void wpa_supplicant_stop_countermeasures(void *eloop_ctx, + void *sock_ctx) +{ + struct wpa_supplicant *wpa_s = eloop_ctx; + + if (wpa_s->countermeasures) { + wpa_s->countermeasures = 0; + wpa_drv_set_countermeasures(wpa_s, 0); + wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped"); + wpa_supplicant_req_scan(wpa_s, 0, 0); + } +} + + +static void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s) +{ + wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); + memset(wpa_s->bssid, 0, ETH_ALEN); + eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); + eapol_sm_notify_portValid(wpa_s->eapol, FALSE); + if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) + eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); +} + + +static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s) +{ + struct wpa_ie_data ie; + int i, pmksa_set = -1; + + if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 || + ie.pmkid == NULL) + return; + + for (i = 0; i < ie.num_pmkid; i++) { + pmksa_set = pmksa_cache_set_current(wpa_s->wpa, + ie.pmkid + i * PMKID_LEN, + NULL, NULL, 0); + if (pmksa_set == 0) { + eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); + break; + } + } + + wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA " + "cache", pmksa_set == 0 ? "" : "not "); +} + + +static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s, + union wpa_event_data *data) +{ + if (data == NULL) { + wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event"); + return; + } + wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR + " index=%d preauth=%d", + MAC2STR(data->pmkid_candidate.bssid), + data->pmkid_candidate.index, + data->pmkid_candidate.preauth); + + pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid, + data->pmkid_candidate.index, + data->pmkid_candidate.preauth); +} + + +static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s) +{ + if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || + wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) + return 0; + + if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA && + wpa_s->current_ssid && + !(wpa_s->current_ssid->eapol_flags & + (EAPOL_FLAG_REQUIRE_KEY_UNICAST | + EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) { + /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either + * plaintext or static WEP keys). */ + return 0; + } + + return 1; +} + + +/** + * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC + * @wpa_s: pointer to wpa_supplicant data + * @ssid: Configuration data for the network + * Returns: 0 on success, -1 on failure + * + * This function is called when starting authentication with a network that is + * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA). + */ +int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s, + struct wpa_ssid *ssid) +{ + int aka = 0, sim = 0, type; + + if (ssid->pcsc == NULL || wpa_s->scard != NULL) + return 0; + + if (ssid->eap_methods == NULL) { + sim = 1; + aka = 1; + } else { + u8 *eap = ssid->eap_methods; + while (*eap != EAP_TYPE_NONE) { + if (*eap == EAP_TYPE_SIM) + sim = 1; + else if (*eap == EAP_TYPE_AKA) + aka = 1; + eap++; + } + } + +#ifndef EAP_SIM + sim = 0; +#endif /* EAP_SIM */ +#ifndef EAP_AKA + aka = 0; +#endif /* EAP_AKA */ + + if (!sim && !aka) { + wpa_printf(MSG_DEBUG, "Selected network is configured to use " + "SIM, but neither EAP-SIM nor EAP-AKA are enabled"); + return 0; + } + + wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM " + "(sim=%d aka=%d) - initialize PCSC", sim, aka); + if (sim && aka) + type = SCARD_TRY_BOTH; + else if (aka) + type = SCARD_USIM_ONLY; + else + type = SCARD_GSM_SIM_ONLY; + + wpa_s->scard = scard_init(type); + if (wpa_s->scard == NULL) { + wpa_printf(MSG_WARNING, "Failed to initialize SIM " + "(pcsc-lite)"); + return -1; + } + wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard); + eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard); + + return 0; +} + + +static int wpa_supplicant_match_privacy(struct wpa_scan_result *bss, + struct wpa_ssid *ssid) +{ + int i, privacy = 0; + + for (i = 0; i < NUM_WEP_KEYS; i++) { + if (ssid->wep_key_len[i]) { + privacy = 1; + break; + } + } + if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && + ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST | + EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) + privacy = 1; + + if (bss->caps & IEEE80211_CAP_PRIVACY) + return privacy; + return !privacy; +} + + +static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid, + struct wpa_scan_result *bss) +{ + struct wpa_ie_data ie; + int proto_match = 0; + + while ((ssid->proto & WPA_PROTO_RSN) && bss->rsn_ie_len > 0) { + proto_match++; + + if (wpa_parse_wpa_ie(bss->rsn_ie, bss->rsn_ie_len, &ie)) { + wpa_printf(MSG_DEBUG, " skip RSN IE - parse failed"); + break; + } + if (!(ie.proto & ssid->proto)) { + wpa_printf(MSG_DEBUG, " skip RSN IE - proto " + "mismatch"); + break; + } + + if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) { + wpa_printf(MSG_DEBUG, " skip RSN IE - PTK cipher " + "mismatch"); + break; + } + + if (!(ie.group_cipher & ssid->group_cipher)) { + wpa_printf(MSG_DEBUG, " skip RSN IE - GTK cipher " + "mismatch"); + break; + } + + if (!(ie.key_mgmt & ssid->key_mgmt)) { + wpa_printf(MSG_DEBUG, " skip RSN IE - key mgmt " + "mismatch"); + break; + } + + wpa_printf(MSG_DEBUG, " selected based on RSN IE"); + return 1; + } + + while ((ssid->proto & WPA_PROTO_WPA) && bss->wpa_ie_len > 0) { + proto_match++; + + if (wpa_parse_wpa_ie(bss->wpa_ie, bss->wpa_ie_len, &ie)) { + wpa_printf(MSG_DEBUG, " skip WPA IE - parse failed"); + break; + } + if (!(ie.proto & ssid->proto)) { + wpa_printf(MSG_DEBUG, " skip WPA IE - proto " + "mismatch"); + break; + } + + if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) { + wpa_printf(MSG_DEBUG, " skip WPA IE - PTK cipher " + "mismatch"); + break; + } + + if (!(ie.group_cipher & ssid->group_cipher)) { + wpa_printf(MSG_DEBUG, " skip WPA IE - GTK cipher " + "mismatch"); + break; + } + + if (!(ie.key_mgmt & ssid->key_mgmt)) { + wpa_printf(MSG_DEBUG, " skip WPA IE - key mgmt " + "mismatch"); + break; + } + + wpa_printf(MSG_DEBUG, " selected based on WPA IE"); + return 1; + } + + if (proto_match == 0) + wpa_printf(MSG_DEBUG, " skip - no WPA/RSN proto match"); + + return 0; +} + + +static struct wpa_scan_result * +wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group, + struct wpa_scan_result *results, int num, + struct wpa_ssid **selected_ssid) +{ + struct wpa_ssid *ssid; + struct wpa_scan_result *bss, *selected = NULL; + int i; + struct wpa_blacklist *e; + + wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d", + group->priority); + + bss = NULL; + ssid = NULL; + /* First, try to find WPA-enabled AP */ + for (i = 0; i < num && !selected; i++) { + bss = &results[i]; + wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' " + "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x", + i, MAC2STR(bss->bssid), + wpa_ssid_txt(bss->ssid, bss->ssid_len), + (unsigned long) bss->wpa_ie_len, + (unsigned long) bss->rsn_ie_len, bss->caps); + if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) && + e->count > 1) { + wpa_printf(MSG_DEBUG, " skip - blacklisted"); + continue; + } + + if (bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0) { + wpa_printf(MSG_DEBUG, " skip - no WPA/RSN IE"); + continue; + } + + for (ssid = group; ssid; ssid = ssid->pnext) { + if (ssid->disabled) + continue; + if (bss->ssid_len != ssid->ssid_len || + memcmp(bss->ssid, ssid->ssid, + bss->ssid_len) != 0) { + wpa_printf(MSG_DEBUG, " skip - " + "SSID mismatch"); + continue; + } + if (ssid->bssid_set && + memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) { + wpa_printf(MSG_DEBUG, " skip - " + "BSSID mismatch"); + continue; + } + if (wpa_supplicant_ssid_bss_match(ssid, bss)) { + selected = bss; + *selected_ssid = ssid; + break; + } + } + } + + /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration + * allows this. */ + for (i = 0; i < num && !selected; i++) { + bss = &results[i]; + if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) && + e->count > 1) { + continue; + } + for (ssid = group; ssid; ssid = ssid->pnext) { + if (!ssid->disabled && + (ssid->ssid_len == 0 || + (bss->ssid_len == ssid->ssid_len && + memcmp(bss->ssid, ssid->ssid, bss->ssid_len) == + 0)) && + (!ssid->bssid_set || + memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0) && + ((ssid->key_mgmt & WPA_KEY_MGMT_NONE) || + (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) + && bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0 && + wpa_supplicant_match_privacy(bss, ssid) && + !(bss->caps & IEEE80211_CAP_IBSS)) + { + selected = bss; + *selected_ssid = ssid; + wpa_printf(MSG_DEBUG, " selected non-WPA AP " + MACSTR " ssid='%s'", + MAC2STR(bss->bssid), + wpa_ssid_txt(bss->ssid, + bss->ssid_len)); + break; + } + } + } + + return selected; +} + + +static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s) +{ + int num, prio; + struct wpa_scan_result *selected = NULL; + struct wpa_ssid *ssid = NULL; + struct wpa_scan_result *results; + + if (wpa_supplicant_get_scan_results(wpa_s) < 0) { + if (wpa_s->conf->ap_scan == 2) + return; + wpa_printf(MSG_DEBUG, "Failed to get scan results - try " + "scanning again"); + wpa_supplicant_req_scan(wpa_s, 1, 0); + return; + } + if (wpa_s->conf->ap_scan == 2) + return; + results = wpa_s->scan_results; + num = wpa_s->num_scan_results; + + while (selected == NULL) { + for (prio = 0; prio < wpa_s->conf->num_prio; prio++) { + selected = wpa_supplicant_select_bss( + wpa_s, wpa_s->conf->pssid[prio], results, num, + &ssid); + if (selected) + break; + } + + if (selected == NULL && wpa_s->blacklist) { + wpa_printf(MSG_DEBUG, "No APs found - clear blacklist " + "and try again"); + wpa_blacklist_clear(wpa_s); + } else if (selected == NULL) { + break; + } + } + + if (selected) { + if (wpa_s->reassociate || + memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0) { + if (wpa_supplicant_scard_init(wpa_s, ssid)) { + wpa_supplicant_req_scan(wpa_s, 10, 0); + return; + } + wpa_supplicant_associate(wpa_s, selected, ssid); + } else { + wpa_printf(MSG_DEBUG, "Already associated with the " + "selected AP."); + } + rsn_preauth_scan_results(wpa_s->wpa, results, num); + } else { + wpa_printf(MSG_DEBUG, "No suitable AP found."); + wpa_supplicant_req_scan(wpa_s, 5, 0); + } +} + + +static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s, + union wpa_event_data *data) +{ + int l, len, found = 0, wpa_found, rsn_found; + u8 *p; + + wpa_printf(MSG_DEBUG, "Association info event"); + if (data->assoc_info.req_ies) + wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies, + data->assoc_info.req_ies_len); + if (data->assoc_info.resp_ies) + wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies, + data->assoc_info.resp_ies_len); + if (data->assoc_info.beacon_ies) + wpa_hexdump(MSG_DEBUG, "beacon_ies", + data->assoc_info.beacon_ies, + data->assoc_info.beacon_ies_len); + + p = data->assoc_info.req_ies; + l = data->assoc_info.req_ies_len; + + /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */ + while (p && l >= 2) { + len = p[1] + 2; + if (len > l) { + wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info", + p, l); + break; + } + if ((p[0] == GENERIC_INFO_ELEM && p[1] >= 6 && + (memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) || + (p[0] == RSN_INFO_ELEM && p[1] >= 2)) { + if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len)) + break; + found = 1; + wpa_find_assoc_pmkid(wpa_s); + break; + } + l -= len; + p += len; + } + if (!found && data->assoc_info.req_ies) + wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); + + /* WPA/RSN IE from Beacon/ProbeResp */ + p = data->assoc_info.beacon_ies; + l = data->assoc_info.beacon_ies_len; + + /* Go through the IEs and make a copy of the WPA/RSN IEs, if present. + */ + wpa_found = rsn_found = 0; + while (p && l >= 2) { + len = p[1] + 2; + if (len > l) { + wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies", + p, l); + break; + } + if (!wpa_found && + p[0] == GENERIC_INFO_ELEM && p[1] >= 6 && + memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) { + wpa_found = 1; + wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len); + } + + if (!rsn_found && + p[0] == RSN_INFO_ELEM && p[1] >= 2) { + rsn_found = 1; + wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len); + } + + l -= len; + p += len; + } + + if (!wpa_found && data->assoc_info.beacon_ies) + wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0); + if (!rsn_found && data->assoc_info.beacon_ies) + wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0); +} + + +static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s, + union wpa_event_data *data) +{ + u8 bssid[ETH_ALEN]; + + if (data) + wpa_supplicant_event_associnfo(wpa_s, data); + + wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED); + if (wpa_drv_get_bssid(wpa_s, bssid) >= 0 && + memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) { + wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID=" + MACSTR, MAC2STR(bssid)); + memcpy(wpa_s->bssid, bssid, ETH_ALEN); + if (wpa_supplicant_dynamic_keys(wpa_s)) { + wpa_clear_keys(wpa_s, bssid); + } + if (wpa_supplicant_select_config(wpa_s) < 0) { + wpa_supplicant_disassociate(wpa_s, + REASON_DEAUTH_LEAVING); + return; + } + } + + wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid)); + if (wpa_s->current_ssid) { + /* When using scanning (ap_scan=1), SIM PC/SC interface can be + * initialized before association, but for other modes, + * initialize PC/SC here, if the current configuration needs + * smartcard or SIM/USIM. */ + wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid); + } + wpa_sm_notify_assoc(wpa_s->wpa, bssid); + l2_packet_notify_auth_start(wpa_s->l2); + + /* + * Set portEnabled first to FALSE in order to get EAP state machine out + * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE + * state machine may transit to AUTHENTICATING state based on obsolete + * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to + * AUTHENTICATED without ever giving chance to EAP state machine to + * reset the state. + */ + eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); + eapol_sm_notify_portValid(wpa_s->eapol, FALSE); + if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) + eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); + /* 802.1X::portControl = Auto */ + eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE); + wpa_s->eapol_received = 0; + if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || + wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { + wpa_supplicant_cancel_auth_timeout(wpa_s); + wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); + } else { + /* Timeout for receiving the first EAPOL packet */ + wpa_supplicant_req_auth_timeout(wpa_s, 10, 0); + } +} + + +static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s) +{ + if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { + /* + * At least Host AP driver and a Prism3 card seemed to be + * generating streams of disconnected events when configuring + * IBSS for WPA-None. Ignore them for now. + */ + wpa_printf(MSG_DEBUG, "Disconnect event - ignore in " + "IBSS/WPA-None mode"); + return; + } + + if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE && + wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) { + wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - " + "pre-shared key may be incorrect"); + } + if (wpa_s->wpa_state >= WPA_ASSOCIATED) + wpa_supplicant_req_scan(wpa_s, 0, 100000); + wpa_blacklist_add(wpa_s, wpa_s->bssid); + wpa_sm_notify_disassoc(wpa_s->wpa); + wpa_supplicant_mark_disassoc(wpa_s); + wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - " + "remove keys"); + if (wpa_supplicant_dynamic_keys(wpa_s)) { + wpa_s->keys_cleared = 0; + wpa_clear_keys(wpa_s, wpa_s->bssid); + } +} + + +static void +wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s, + union wpa_event_data *data) +{ + int pairwise; + time_t now; + + wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected"); + pairwise = (data && data->michael_mic_failure.unicast); + wpa_sm_key_request(wpa_s->wpa, 1, pairwise); + time(&now); + if (wpa_s->last_michael_mic_error && + now - wpa_s->last_michael_mic_error <= 60) { + /* initialize countermeasures */ + wpa_s->countermeasures = 1; + wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started"); + + /* + * Need to wait for completion of request frame. We do not get + * any callback for the message completion, so just wait a + * short while and hope for the best. */ + usleep(10000); + + wpa_drv_set_countermeasures(wpa_s, 1); + wpa_supplicant_deauthenticate(wpa_s, + REASON_MICHAEL_MIC_FAILURE); + eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, + wpa_s, NULL); + eloop_register_timeout(60, 0, + wpa_supplicant_stop_countermeasures, + wpa_s, NULL); + /* TODO: mark the AP rejected for 60 second. STA is + * allowed to associate with another AP.. */ + } + wpa_s->last_michael_mic_error = now; +} + + +static void +wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s, + union wpa_event_data *data) +{ + if (strcmp(wpa_s->ifname, data->interface_status.ifname) != 0) + return; + + switch (data->interface_status.ievent) { + case EVENT_INTERFACE_ADDED: + if (!wpa_s->interface_removed) + break; + wpa_s->interface_removed = 0; + wpa_printf(MSG_DEBUG, "Configured interface was added."); + if (wpa_supplicant_driver_init(wpa_s, 1) < 0) { + wpa_printf(MSG_INFO, "Failed to initialize the driver " + "after interface was added."); + } + break; + case EVENT_INTERFACE_REMOVED: + wpa_printf(MSG_DEBUG, "Configured interface was removed."); + wpa_s->interface_removed = 1; + wpa_supplicant_mark_disassoc(wpa_s); + l2_packet_deinit(wpa_s->l2); + wpa_s->l2 = NULL; + break; + } +} + + +void wpa_supplicant_event(struct wpa_supplicant *wpa_s, wpa_event_type event, + union wpa_event_data *data) +{ + switch (event) { + case EVENT_ASSOC: + wpa_supplicant_event_assoc(wpa_s, data); + break; + case EVENT_DISASSOC: + wpa_supplicant_event_disassoc(wpa_s); + break; + case EVENT_MICHAEL_MIC_FAILURE: + wpa_supplicant_event_michael_mic_failure(wpa_s, data); + break; + case EVENT_SCAN_RESULTS: + wpa_supplicant_event_scan_results(wpa_s); + break; + case EVENT_ASSOCINFO: + wpa_supplicant_event_associnfo(wpa_s, data); + break; + case EVENT_INTERFACE_STATUS: + wpa_supplicant_event_interface_status(wpa_s, data); + break; + case EVENT_PMKID_CANDIDATE: + wpa_supplicant_event_pmkid_candidate(wpa_s, data); + break; + default: + wpa_printf(MSG_INFO, "Unknown event %d", event); + break; + } +} |