/* Copyright (C) 2006, Red Hat, Inc. */ #include #include #include #include "assoc.h" #include "join.h" #include "decl.h" #include "hostcmd.h" #include "host.h" static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; /* From ieee80211_module.c */ static const char *libertas_escape_essid(const char *essid, u8 essid_len) { static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; const char *s = essid; char *d = escaped; if (ieee80211_is_empty_essid(essid, essid_len)) return ""; essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); while (essid_len--) { if (*s == '\0') { *d++ = '\\'; *d++ = '0'; s++; } else { *d++ = *s++; } } *d = '\0'; return escaped; } static void print_assoc_req(const char * extra, struct assoc_request * assoc_req) { lbs_deb_assoc( "#### Association Request: %s\n" " flags: 0x%08lX\n" " SSID: '%s'\n" " channel: %d\n" " band: %d\n" " mode: %d\n" " BSSID: " MAC_FMT "\n" " WPA: %d\n" " WPA2: %d\n" " WEP status: %d\n" " auth: %d\n" " auth_alg: %d\n" " encmode: %d\n", extra, assoc_req->flags, libertas_escape_essid(assoc_req->ssid.ssid, assoc_req->ssid.ssidlength), assoc_req->channel, assoc_req->band, assoc_req->mode, MAC_ARG(assoc_req->bssid), assoc_req->secinfo.WPAenabled, assoc_req->secinfo.WPA2enabled, assoc_req->secinfo.WEPstatus, assoc_req->secinfo.authmode, assoc_req->secinfo.auth1xalg, assoc_req->secinfo.Encryptionmode); } static int assoc_helper_essid(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; struct bss_descriptor * bss; lbs_deb_enter(LBS_DEB_ASSOC); /* FIXME: take channel into account when picking SSIDs if a channel * is set. */ lbs_deb_assoc("New SSID requested: %s\n", assoc_req->ssid.ssid); if (assoc_req->mode == IW_MODE_INFRA) { if (adapter->prescan) { libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0); } bss = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL, IW_MODE_INFRA); if (bss != NULL) { lbs_deb_assoc("SSID found in scan list, associating\n"); memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); ret = wlan_associate(priv, assoc_req); } else { lbs_deb_assoc("SSID '%s' not found; cannot associate\n", assoc_req->ssid.ssid); } } else if (assoc_req->mode == IW_MODE_ADHOC) { /* Scan for the network, do not save previous results. Stale * scan data will cause us to join a non-existant adhoc network */ libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1); /* Search for the requested SSID in the scan table */ bss = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL, IW_MODE_ADHOC); if (bss != NULL) { lbs_deb_assoc("SSID found joining\n"); memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); libertas_join_adhoc_network(priv, assoc_req); } else { /* else send START command */ lbs_deb_assoc("SSID not found in list, so creating adhoc" " with SSID '%s'\n", assoc_req->ssid.ssid); memcpy(&assoc_req->bss.ssid, &assoc_req->ssid, sizeof(struct WLAN_802_11_SSID)); libertas_start_adhoc_network(priv, assoc_req); } } lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_bssid(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; struct bss_descriptor * bss; lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID" MAC_FMT "\n", MAC_ARG(assoc_req->bssid)); /* Search for index position in list for requested MAC */ bss = libertas_find_BSSID_in_list(adapter, assoc_req->bssid, assoc_req->mode); if (bss == NULL) { lbs_deb_assoc("ASSOC: WAP: BSSID " MAC_FMT " not found, " "cannot associate.\n", MAC_ARG(assoc_req->bssid)); goto out; } memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); if (assoc_req->mode == IW_MODE_INFRA) { ret = wlan_associate(priv, assoc_req); lbs_deb_assoc("ASSOC: wlan_associate(bssid) returned %d\n", ret); } else if (assoc_req->mode == IW_MODE_ADHOC) { libertas_join_adhoc_network(priv, assoc_req); } out: lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_associate(wlan_private *priv, struct assoc_request * assoc_req) { int ret = 0, done = 0; /* If we're given and 'any' BSSID, try associating based on SSID */ if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { if (compare_ether_addr(bssid_any, assoc_req->bssid) && compare_ether_addr(bssid_off, assoc_req->bssid)) { ret = assoc_helper_bssid(priv, assoc_req); done = 1; if (ret) { lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret); } } } if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { ret = assoc_helper_essid(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret); } } return ret; } static int assoc_helper_mode(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); if (assoc_req->mode == adapter->mode) goto done; if (assoc_req->mode == IW_MODE_INFRA) { if (adapter->psstate != PS_STATE_FULL_POWER) libertas_ps_wakeup(priv, cmd_option_waitforrsp); adapter->psmode = wlan802_11powermodecam; } adapter->mode = assoc_req->mode; ret = libertas_prepare_and_send_command(priv, cmd_802_11_snmp_mib, 0, cmd_option_waitforrsp, OID_802_11_INFRASTRUCTURE_MODE, (void *) (size_t) assoc_req->mode); done: lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int update_channel(wlan_private * priv) { /* the channel in f/w could be out of sync, get the current channel */ return libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel, cmd_opt_802_11_rf_channel_get, cmd_option_waitforrsp, 0, NULL); } static int assoc_helper_channel(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); ret = update_channel(priv); if (ret < 0) { lbs_deb_assoc("ASSOC: channel: error getting channel."); } if (assoc_req->channel == adapter->curbssparams.channel) goto done; lbs_deb_assoc("ASSOC: channel: %d -> %d\n", adapter->curbssparams.channel, assoc_req->channel); ret = libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel, cmd_opt_802_11_rf_channel_set, cmd_option_waitforrsp, 0, &assoc_req->channel); if (ret < 0) { lbs_deb_assoc("ASSOC: channel: error setting channel."); } ret = update_channel(priv); if (ret < 0) { lbs_deb_assoc("ASSOC: channel: error getting channel."); } if (assoc_req->channel != adapter->curbssparams.channel) { lbs_deb_assoc("ASSOC: channel: failed to update channel to %d", assoc_req->channel); goto done; } if ( assoc_req->secinfo.wep_enabled && (assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len || assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len)) { /* Make sure WEP keys are re-sent to firmware */ set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags); } /* Must restart/rejoin adhoc networks after channel change */ set_bit(ASSOC_FLAG_SSID, &assoc_req->flags); done: lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_wep_keys(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int i; int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); /* Set or remove WEP keys */ if ( assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len || assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len) { ret = libertas_prepare_and_send_command(priv, cmd_802_11_set_wep, cmd_act_add, cmd_option_waitforrsp, 0, assoc_req); } else { ret = libertas_prepare_and_send_command(priv, cmd_802_11_set_wep, cmd_act_remove, cmd_option_waitforrsp, 0, NULL); } if (ret) goto out; /* enable/disable the MAC's WEP packet filter */ if (assoc_req->secinfo.wep_enabled) adapter->currentpacketfilter |= cmd_act_mac_wep_enable; else adapter->currentpacketfilter &= ~cmd_act_mac_wep_enable; ret = libertas_set_mac_packet_filter(priv); if (ret) goto out; mutex_lock(&adapter->lock); /* Copy WEP keys into adapter wep key fields */ for (i = 0; i < 4; i++) { memcpy(&adapter->wep_keys[i], &assoc_req->wep_keys[i], sizeof(struct WLAN_802_11_KEY)); } adapter->wep_tx_keyidx = assoc_req->wep_tx_keyidx; mutex_unlock(&adapter->lock); out: lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_secinfo(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); memcpy(&adapter->secinfo, &assoc_req->secinfo, sizeof(struct wlan_802_11_security)); ret = libertas_set_mac_packet_filter(priv); lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_wpa_keys(wlan_private *priv, struct assoc_request * assoc_req) { int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); /* enable/Disable RSN */ ret = libertas_prepare_and_send_command(priv, cmd_802_11_enable_rsn, cmd_act_set, cmd_option_waitforrsp, 0, assoc_req); if (ret) goto out; ret = libertas_prepare_and_send_command(priv, cmd_802_11_key_material, cmd_act_set, cmd_option_waitforrsp, 0, assoc_req); out: lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int assoc_helper_wpa_ie(wlan_private *priv, struct assoc_request * assoc_req) { wlan_adapter *adapter = priv->adapter; int ret = 0; lbs_deb_enter(LBS_DEB_ASSOC); if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) { memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len); adapter->wpa_ie_len = assoc_req->wpa_ie_len; } else { memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN); adapter->wpa_ie_len = 0; } lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); return ret; } static int should_deauth_infrastructure(wlan_adapter *adapter, struct assoc_request * assoc_req) { if (adapter->connect_status != libertas_connected) return 0; if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { lbs_deb_assoc("Deauthenticating due to new SSID in " " configuration request.\n"); return 1; } if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { if (adapter->secinfo.auth_mode != assoc_req->secinfo.auth_mode) { lbs_deb_assoc("Deauthenticating due to updated security " "info in configuration request.\n"); return 1; } } if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { lbs_deb_assoc("Deauthenticating due to new BSSID in " " configuration request.\n"); return 1; } /* FIXME: deal with 'auto' mode somehow */ if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { if (assoc_req->mode != IW_MODE_INFRA) return 1; } return 0; } static int should_stop_adhoc(wlan_adapter *adapter, struct assoc_request * assoc_req) { if (adapter->connect_status != libertas_connected) return 0; if (adapter->curbssparams.ssid.ssidlength != assoc_req->ssid.ssidlength) return 1; if (memcmp(adapter->curbssparams.ssid.ssid, assoc_req->ssid.ssid, adapter->curbssparams.ssid.ssidlength)) return 1; /* FIXME: deal with 'auto' mode somehow */ if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { if (assoc_req->mode != IW_MODE_ADHOC) return 1; } if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) { if (assoc_req->channel != adapter->curbssparams.channel) return 1; } return 0; } void libertas_association_worker(struct work_struct *work) { wlan_private *priv = container_of(work, wlan_private, assoc_work.work); wlan_adapter *adapter = priv->adapter; struct assoc_request * assoc_req = NULL; int ret = 0; int find_any_ssid = 0; lbs_deb_enter(LBS_DEB_ASSOC); mutex_lock(&adapter->lock); assoc_req = adapter->pending_assoc_req; adapter->pending_assoc_req = NULL; adapter->in_progress_assoc_req = assoc_req; mutex_unlock(&adapter->lock); if (!assoc_req) goto done; print_assoc_req(__func__, assoc_req); /* If 'any' SSID was specified, find an SSID to associate with */ if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags) && !assoc_req->ssid.ssidlength) find_any_ssid = 1; /* But don't use 'any' SSID if there's a valid locked BSSID to use */ if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { if (compare_ether_addr(assoc_req->bssid, bssid_any) && compare_ether_addr(assoc_req->bssid, bssid_off)) find_any_ssid = 0; } if (find_any_ssid) { u8 new_mode; ret = libertas_find_best_network_SSID(priv, &assoc_req->ssid, assoc_req->mode, &new_mode); if (ret) { lbs_deb_assoc("Could not find best network\n"); ret = -ENETUNREACH; goto out; } /* Ensure we switch to the mode of the AP */ if (assoc_req->mode == IW_MODE_AUTO) { set_bit(ASSOC_FLAG_MODE, &assoc_req->flags); assoc_req->mode = new_mode; } } /* * Check if the attributes being changing require deauthentication * from the currently associated infrastructure access point. */ if (adapter->mode == IW_MODE_INFRA) { if (should_deauth_infrastructure(adapter, assoc_req)) { ret = libertas_send_deauthentication(priv); if (ret) { lbs_deb_assoc("Deauthentication due to new " "configuration request failed: %d\n", ret); } } } else if (adapter->mode == IW_MODE_ADHOC) { if (should_stop_adhoc(adapter, assoc_req)) { ret = libertas_stop_adhoc_network(priv); if (ret) { lbs_deb_assoc("Teardown of AdHoc network due to " "new configuration request failed: %d\n", ret); } } } /* Send the various configuration bits to the firmware */ if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { ret = assoc_helper_mode(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) mode: ret = %d\n", __LINE__, ret); goto out; } } if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) { ret = assoc_helper_channel(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) channel: ret = %d\n", __LINE__, ret); goto out; } } if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags) || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) { ret = assoc_helper_wep_keys(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret); goto out; } } if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { ret = assoc_helper_secinfo(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret); goto out; } } if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) { ret = assoc_helper_wpa_ie(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret); goto out; } } if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags) || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) { ret = assoc_helper_wpa_keys(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret); goto out; } } /* SSID/BSSID should be the _last_ config option set, because they * trigger the association attempt. */ if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags) || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { int success = 1; ret = assoc_helper_associate(priv, assoc_req); if (ret) { lbs_deb_assoc("ASSOC: association attempt unsuccessful: %d\n", ret); success = 0; } if (adapter->connect_status != libertas_connected) { lbs_deb_assoc("ASSOC: assoication attempt unsuccessful, " "not connected.\n"); success = 0; } if (success) { lbs_deb_assoc("ASSOC: association attempt successful. " "Associated to '%s' (" MAC_FMT ")\n", libertas_escape_essid(adapter->curbssparams.ssid.ssid, adapter->curbssparams.ssid.ssidlength), MAC_ARG(adapter->curbssparams.bssid)); libertas_prepare_and_send_command(priv, cmd_802_11_rssi, 0, cmd_option_waitforrsp, 0, NULL); libertas_prepare_and_send_command(priv, cmd_802_11_get_log, 0, cmd_option_waitforrsp, 0, NULL); } else { ret = -1; } } out: if (ret) { lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n", ret); } mutex_lock(&adapter->lock); adapter->in_progress_assoc_req = NULL; mutex_unlock(&adapter->lock); kfree(assoc_req); done: lbs_deb_leave(LBS_DEB_ASSOC); } /* * Caller MUST hold any necessary locks */ struct assoc_request * wlan_get_association_request(wlan_adapter *adapter) { struct assoc_request * assoc_req; if (!adapter->pending_assoc_req) { adapter->pending_assoc_req = kzalloc(sizeof(struct assoc_request), GFP_KERNEL); if (!adapter->pending_assoc_req) { lbs_pr_info("Not enough memory to allocate association" " request!\n"); return NULL; } } /* Copy current configuration attributes to the association request, * but don't overwrite any that are already set. */ assoc_req = adapter->pending_assoc_req; if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { memcpy(&assoc_req->ssid, &adapter->curbssparams.ssid, sizeof(struct WLAN_802_11_SSID)); } if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) assoc_req->channel = adapter->curbssparams.channel; if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags)) assoc_req->band = adapter->curbssparams.band; if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) assoc_req->mode = adapter->mode; if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { memcpy(&assoc_req->bssid, adapter->curbssparams.bssid, ETH_ALEN); } if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) { int i; for (i = 0; i < 4; i++) { memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i], sizeof(struct WLAN_802_11_KEY)); } } if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx; if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) { memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key, sizeof(struct WLAN_802_11_KEY)); } if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) { memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key, sizeof(struct WLAN_802_11_KEY)); } if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { memcpy(&assoc_req->secinfo, &adapter->secinfo, sizeof(struct wlan_802_11_security)); } if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) { memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie, MAX_WPA_IE_LEN); assoc_req->wpa_ie_len = adapter->wpa_ie_len; } print_assoc_req(__func__, assoc_req); return assoc_req; }