+/**
+ * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
+ * @priv: driver_nl80211 private data
+ * @alpha2_arg: country to which to switch to
+ * Returns: 0 on success, -1 on failure
+ *
+ * This asks nl80211 to set the regulatory domain for given
+ * country ISO / IEC alpha2.
+ */
+static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ char alpha2[3];
+ struct nl_msg *msg;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ alpha2[0] = alpha2_arg[0];
+ alpha2[1] = alpha2_arg[1];
+ alpha2[2] = '\0';
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_REQ_SET_REG, 0);
+
+ NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
+ if (send_and_recv_msgs(drv, msg, NULL, NULL))
+ return -EINVAL;
+ return 0;
+nla_put_failure:
+ return -EINVAL;
+}
+
+
+struct wiphy_info_data {
+ int max_scan_ssids;
+ int ap_supported;
+};
+
+
+static int wiphy_info_handler(struct nl_msg *msg, void *arg)
+{
+ struct nlattr *tb[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct wiphy_info_data *info = arg;
+
+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
+ info->max_scan_ssids =
+ nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
+
+ if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
+ struct nlattr *nl_mode;
+ int i;
+ nla_for_each_nested(nl_mode,
+ tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
+ if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
+ info->ap_supported = 1;
+ break;
+ }
+ }
+ }
+
+ return NL_SKIP;
+}
+
+
+static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
+ struct wiphy_info_data *info)
+{
+ struct nl_msg *msg;
+
+ os_memset(info, 0, sizeof(*info));
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_GET_WIPHY, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
+ return 0;
+ msg = NULL;
+nla_put_failure:
+ nlmsg_free(msg);
+ return -1;
+}
+
+
+static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
+{
+ struct wiphy_info_data info;
+ if (wpa_driver_nl80211_get_info(drv, &info))
+ return;
+ drv->has_capability = 1;
+ /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
+ drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
+ WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
+ WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
+ WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
+ drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
+ WPA_DRIVER_CAPA_ENC_WEP104 |
+ WPA_DRIVER_CAPA_ENC_TKIP |
+ WPA_DRIVER_CAPA_ENC_CCMP;
+
+ drv->capa.max_scan_ssids = info.max_scan_ssids;
+ if (info.ap_supported)
+ drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
+}
+
+
+/**
+ * wpa_driver_nl80211_init - Initialize nl80211 driver interface
+ * @ctx: context to be used when calling wpa_supplicant functions,
+ * e.g., wpa_supplicant_event()
+ * @ifname: interface name, e.g., wlan0
+ * Returns: Pointer to private data, %NULL on failure
+ */
+static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
+{
+ int s, ret;
+ struct sockaddr_nl local;
+ struct wpa_driver_nl80211_data *drv;
+
+ drv = os_zalloc(sizeof(*drv));
+ if (drv == NULL)
+ return NULL;
+ drv->ctx = ctx;
+ os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
+#ifdef CONFIG_AP
+ drv->monitor_ifidx = -1;
+ drv->monitor_sock = -1;
+#endif /* CONFIG_AP */
+
+ drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
+ if (drv->nl_cb == NULL) {
+ wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
+ "callbacks");
+ goto err1;
+ }
+
+ drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
+ if (drv->nl_handle == NULL) {
+ wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
+ "callbacks");
+ goto err2;
+ }
+
+ if (genl_connect(drv->nl_handle)) {
+ wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
+ "netlink");
+ goto err3;
+ }
+
+ drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
+ if (drv->nl_cache == NULL) {
+ wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
+ "netlink cache");
+ goto err3;
+ }
+
+ drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
+ if (drv->nl80211 == NULL) {
+ wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
+ "found");
+ goto err4;
+ }
+
+ ret = nl_get_multicast_id(drv, "nl80211", "scan");
+ if (ret >= 0)
+ ret = nl_socket_add_membership(drv->nl_handle, ret);
+ if (ret < 0) {
+ wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
+ "membership for scan events: %d (%s)",
+ ret, strerror(-ret));
+ goto err4;
+ }
+
+ ret = nl_get_multicast_id(drv, "nl80211", "mlme");
+ if (ret >= 0)
+ ret = nl_socket_add_membership(drv->nl_handle, ret);
+ if (ret < 0) {
+ wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
+ "membership for mlme events: %d (%s)",
+ ret, strerror(-ret));
+ goto err4;
+ }
+ drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
+
+ eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
+ wpa_driver_nl80211_event_receive, drv, ctx);
+
+ drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
+ if (drv->ioctl_sock < 0) {
+ perror("socket(PF_INET,SOCK_DGRAM)");
+ goto err5;
+ }
+
+ s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (s < 0) {
+ perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
+ goto err6;
+ }
+
+ os_memset(&local, 0, sizeof(local));
+ local.nl_family = AF_NETLINK;
+ local.nl_groups = RTMGRP_LINK;
+ if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
+ perror("bind(netlink)");
+ close(s);
+ goto err6;
+ }
+
+#ifndef HOSTAPD
+ eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
+ ctx);
+#endif /* HOSTAPD */
+ drv->link_event_sock = s;
+
+ if (wpa_driver_nl80211_finish_drv_init(drv))
+ goto err7;
+
+ return drv;
+
+err7:
+ eloop_unregister_read_sock(drv->link_event_sock);
+ close(drv->link_event_sock);
+err6:
+ close(drv->ioctl_sock);
+err5:
+ genl_family_put(drv->nl80211);
+err4:
+ nl_cache_free(drv->nl_cache);
+err3:
+ nl_handle_destroy(drv->nl_handle);
+err2:
+ nl_cb_put(drv->nl_cb);
+err1:
+ os_free(drv);
+ return NULL;
+}
+
+
+static int
+wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
+{
+ int flags;
+
+ drv->ifindex = if_nametoindex(drv->ifname);
+
+ if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
+ wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
+ "use managed mode");
+ }
+
+ if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
+ wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
+ drv->ifname);
+ return -1;
+ }
+ if (!(flags & IFF_UP)) {
+ if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
+ wpa_printf(MSG_ERROR, "Could not set interface '%s' "
+ "UP", drv->ifname);
+ return -1;
+ }
+ }
+
+ wpa_driver_nl80211_capa(drv);
+
+ wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
+
+ return 0;
+}
+
+
+/**
+ * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
+ * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
+ *
+ * Shut down driver interface and processing of driver events. Free
+ * private data buffer if one was allocated in wpa_driver_nl80211_init().
+ */
+static void wpa_driver_nl80211_deinit(void *priv)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ int flags;
+
+#ifdef CONFIG_AP
+ if (drv->monitor_ifidx >= 0)
+ nl80211_remove_iface(drv, drv->monitor_ifidx);
+ if (drv->monitor_sock >= 0) {
+ eloop_unregister_read_sock(drv->monitor_sock);
+ close(drv->monitor_sock);
+ }
+#endif /* CONFIG_AP */
+
+ eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
+
+ wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
+
+ wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
+
+ eloop_unregister_read_sock(drv->link_event_sock);
+
+ if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
+ (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
+ wpa_driver_nl80211_set_mode(drv, 0);
+
+ close(drv->link_event_sock);
+ close(drv->ioctl_sock);
+
+ eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
+ genl_family_put(drv->nl80211);
+ nl_cache_free(drv->nl_cache);
+ nl_handle_destroy(drv->nl_handle);
+ nl_cb_put(drv->nl_cb);
+
+ os_free(drv);
+}
+
+
+/**
+ * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
+ * @eloop_ctx: Unused
+ * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
+ *
+ * This function can be used as registered timeout when starting a scan to
+ * generate a scan completed event if the driver does not report this.
+ */
+static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+ wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
+#ifndef HOSTAPD
+ wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
+#endif /* HOSTAPD */
+}
+
+
+/**
+ * wpa_driver_nl80211_scan - Request the driver to initiate scan
+ * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
+ * @params: Scan parameters
+ * Returns: 0 on success, -1 on failure
+ */
+static int wpa_driver_nl80211_scan(void *priv,
+ struct wpa_driver_scan_params *params)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ int ret = 0, timeout;
+ struct nl_msg *msg, *ssids, *freqs;
+ size_t i;
+
+ msg = nlmsg_alloc();
+ ssids = nlmsg_alloc();
+ freqs = nlmsg_alloc();
+ if (!msg || !ssids || !freqs) {
+ nlmsg_free(msg);
+ nlmsg_free(ssids);
+ nlmsg_free(freqs);
+ return -1;
+ }
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
+ NL80211_CMD_TRIGGER_SCAN, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ for (i = 0; i < params->num_ssids; i++) {
+ NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
+ params->ssids[i].ssid);
+ }
+ if (params->num_ssids)
+ nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
+
+ if (params->extra_ies) {
+ NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
+ params->extra_ies);
+ }
+
+ if (params->freqs) {
+ for (i = 0; params->freqs[i]; i++)
+ NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
+ nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
+ }
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ msg = NULL;
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+ goto nla_put_failure;
+ }
+
+ /* Not all drivers generate "scan completed" wireless event, so try to
+ * read results after a timeout. */
+ timeout = 10;
+ if (drv->scan_complete_events) {
+ /*
+ * The driver seems to deliver events to notify when scan is
+ * complete, so use longer timeout to avoid race conditions
+ * with scanning and following association request.
+ */
+ timeout = 30;
+ }
+ wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
+ "seconds", ret, timeout);
+ eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
+ eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
+ drv, drv->ctx);
+
+nla_put_failure:
+ nlmsg_free(ssids);
+ nlmsg_free(msg);
+ nlmsg_free(freqs);
+ return ret;
+}
+
+
+static int bss_info_handler(struct nl_msg *msg, void *arg)
+{
+ struct nlattr *tb[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct nlattr *bss[NL80211_BSS_MAX + 1];
+ static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
+ [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
+ [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
+ [NL80211_BSS_TSF] = { .type = NLA_U64 },
+ [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
+ [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
+ [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
+ [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
+ [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
+ };
+ struct wpa_scan_results *res = arg;
+ struct wpa_scan_res **tmp;
+ struct wpa_scan_res *r;
+ const u8 *ie;
+ size_t ie_len;
+
+ nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+ if (!tb[NL80211_ATTR_BSS])
+ return NL_SKIP;
+ if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
+ bss_policy))
+ return NL_SKIP;
+ if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
+ ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
+ ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
+ } else {
+ ie = NULL;
+ ie_len = 0;
+ }
+
+ r = os_zalloc(sizeof(*r) + ie_len);
+ if (r == NULL)
+ return NL_SKIP;
+ if (bss[NL80211_BSS_BSSID])
+ os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
+ ETH_ALEN);
+ if (bss[NL80211_BSS_FREQUENCY])
+ r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
+ if (bss[NL80211_BSS_BEACON_INTERVAL])
+ r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
+ if (bss[NL80211_BSS_CAPABILITY])
+ r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
+ r->flags |= WPA_SCAN_NOISE_INVALID;
+ if (bss[NL80211_BSS_SIGNAL_MBM]) {
+ r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
+ r->level /= 100; /* mBm to dBm */
+ r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
+ } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
+ r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
+ r->flags |= WPA_SCAN_LEVEL_INVALID;
+ } else
+ r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
+ if (bss[NL80211_BSS_TSF])
+ r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
+ r->ie_len = ie_len;
+ if (ie)
+ os_memcpy(r + 1, ie, ie_len);
+
+ tmp = os_realloc(res->res,
+ (res->num + 1) * sizeof(struct wpa_scan_res *));
+ if (tmp == NULL) {
+ os_free(r);
+ return NL_SKIP;
+ }
+ tmp[res->num++] = r;
+ res->res = tmp;
+
+ return NL_SKIP;
+}
+
+
+/**
+ * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
+ * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
+ * Returns: Scan results on success, -1 on failure
+ */
+static struct wpa_scan_results *
+wpa_driver_nl80211_get_scan_results(void *priv)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ struct nl_msg *msg;
+ struct wpa_scan_results *res;
+ int ret;
+
+ res = os_zalloc(sizeof(*res));
+ if (res == NULL)
+ return 0;
+ msg = nlmsg_alloc();
+ if (!msg)
+ goto nla_put_failure;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
+ NL80211_CMD_GET_SCAN, 0);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
+ msg = NULL;
+ if (ret == 0) {
+ wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
+ (unsigned long) res->num);
+ return res;
+ }
+ wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+nla_put_failure:
+ nlmsg_free(msg);
+ wpa_scan_results_free(res);
+ return NULL;
+}
+
+
+static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
+ 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 nl_msg *msg;
+ int ret;
+
+ wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
+ "set_tx=%d seq_len=%lu key_len=%lu",
+ __func__, ifindex, alg, addr, key_idx, set_tx,
+ (unsigned long) seq_len, (unsigned long) key_len);
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ if (alg == WPA_ALG_NONE) {
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_DEL_KEY, 0);
+ } else {
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_NEW_KEY, 0);
+ NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
+ switch (alg) {
+ case WPA_ALG_WEP:
+ if (key_len == 5)
+ NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
+ 0x000FAC01);
+ else
+ NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
+ 0x000FAC05);
+ break;
+ case WPA_ALG_TKIP:
+ NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
+ break;
+ case WPA_ALG_CCMP:
+ NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
+ break;
+ case WPA_ALG_IGTK:
+ NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
+ break;
+ default:
+ wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
+ "algorithm %d", __func__, alg);
+ nlmsg_free(msg);
+ return -1;
+ }
+ }
+
+ if (seq)
+ NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
+
+ if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
+ {
+ wpa_printf(MSG_DEBUG, " addr=" MACSTR, MAC2STR(addr));
+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+ }
+ NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret == -ENOENT && alg == WPA_ALG_NONE)
+ ret = 0;
+ if (ret)
+ wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
+ ret, strerror(-ret));
+
+ /*
+ * If we failed or don't need to set the default TX key (below),
+ * we're done here.
+ */
+ if (ret || !set_tx || alg == WPA_ALG_NONE)
+ return ret;
+#ifdef HOSTAPD /* FIX: is this needed? */
+ if (addr)
+ return ret;
+#endif /* HOSTAPD */
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_SET_KEY, 0);
+ NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
+ if (alg == WPA_ALG_IGTK)
+ NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
+ else
+ NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret == -ENOENT)
+ ret = 0;
+ if (ret)
+ wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
+ "err=%d %s)", ret, strerror(-ret));
+ return ret;
+
+nla_put_failure:
+ return -ENOBUFS;
+}
+
+
+static int wpa_driver_nl80211_set_key(void *priv, 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 wpa_driver_nl80211_data *drv = priv;
+ return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
+ seq_len, key, key_len);
+}
+
+
+static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
+ const u8 *addr, int cmd, u16 reason_code)
+{
+ int ret = -1;
+ struct nl_msg *msg;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+ NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ msg = NULL;
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+ goto nla_put_failure;
+ }
+ ret = 0;
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return ret;
+}
+
+
+static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
+ int reason_code)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ wpa_printf(MSG_DEBUG, "%s", __func__);
+ return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
+ reason_code);
+}
+
+
+static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
+ int reason_code)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ wpa_printf(MSG_DEBUG, "%s", __func__);
+ return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
+ reason_code);
+}
+
+
+static int wpa_driver_nl80211_authenticate(
+ void *priv, struct wpa_driver_auth_params *params)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ int ret = -1, i;
+ struct nl_msg *msg;
+ enum nl80211_auth_type type;
+
+ drv->associated = 0;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
+ drv->ifindex);
+
+ for (i = 0; i < 4; i++) {
+ if (!params->wep_key[i])
+ continue;
+ wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
+ i == params->wep_tx_keyidx, NULL, 0,
+ params->wep_key[i],
+ params->wep_key_len[i]);
+ }
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
+ NL80211_CMD_AUTHENTICATE, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+ if (params->bssid) {
+ wpa_printf(MSG_DEBUG, " * bssid=" MACSTR,
+ MAC2STR(params->bssid));
+ NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
+ }
+ if (params->freq) {
+ wpa_printf(MSG_DEBUG, " * freq=%d", params->freq);
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
+ }
+ if (params->ssid) {
+ wpa_hexdump_ascii(MSG_DEBUG, " * SSID",
+ params->ssid, params->ssid_len);
+ NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
+ params->ssid);
+ }
+ wpa_hexdump(MSG_DEBUG, " * IEs", params->ie, params->ie_len);
+ if (params->ie)
+ NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
+ /*
+ * TODO: if multiple auth_alg options enabled, try them one by one if
+ * the AP rejects authentication due to unknown auth alg
+ */
+ if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
+ type = NL80211_AUTHTYPE_OPEN_SYSTEM;
+ else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
+ type = NL80211_AUTHTYPE_SHARED_KEY;
+ else if (params->auth_alg & AUTH_ALG_LEAP)
+ type = NL80211_AUTHTYPE_NETWORK_EAP;
+ else if (params->auth_alg & AUTH_ALG_FT)
+ type = NL80211_AUTHTYPE_FT;
+ else
+ goto nla_put_failure;
+ wpa_printf(MSG_DEBUG, " * Auth Type %d", type);
+ NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ msg = NULL;
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
+ "(%s)", ret, strerror(-ret));
+ goto nla_put_failure;
+ }
+ ret = 0;
+ wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
+ "successfully");
+
+nla_put_failure:
+ nlmsg_free(msg);
+ return ret;
+}
+
+
+#if defined(CONFIG_AP) || defined(HOSTAPD)
+
+struct phy_info_arg {
+ u16 *num_modes;
+ struct hostapd_hw_modes *modes;
+};
+
+static int phy_info_handler(struct nl_msg *msg, void *arg)
+{
+ struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ struct phy_info_arg *phy_info = arg;
+
+ struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
+
+ struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
+ static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
+ [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
+ [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
+ [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
+ [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
+ [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
+ [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
+ };
+
+ struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
+ static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
+ [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
+ [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
+ };
+
+ struct nlattr *nl_band;
+ struct nlattr *nl_freq;
+ struct nlattr *nl_rate;
+ int rem_band, rem_freq, rem_rate;
+ struct hostapd_hw_modes *mode;
+ int idx, mode_is_set;
+
+ nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
+ return NL_SKIP;
+
+ nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
+ mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
+ if (!mode)
+ return NL_SKIP;
+ phy_info->modes = mode;
+
+ mode_is_set = 0;
+
+ mode = &phy_info->modes[*(phy_info->num_modes)];
+ memset(mode, 0, sizeof(*mode));
+ *(phy_info->num_modes) += 1;
+
+ nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
+ nla_len(nl_band), NULL);
+
+ if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
+ mode->ht_capab = nla_get_u16(
+ tb_band[NL80211_BAND_ATTR_HT_CAPA]);
+ }
+
+ nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
+ nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
+ nla_len(nl_freq), freq_policy);
+ if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
+ continue;
+ mode->num_channels++;
+ }
+
+ mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
+ if (!mode->channels)
+ return NL_SKIP;
+
+ idx = 0;
+
+ nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
+ nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
+ nla_len(nl_freq), freq_policy);
+ if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
+ continue;
+
+ mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
+ mode->channels[idx].flag = 0;
+
+ if (!mode_is_set) {
+ /* crude heuristic */
+ if (mode->channels[idx].freq < 4000)
+ mode->mode = HOSTAPD_MODE_IEEE80211B;
+ else
+ mode->mode = HOSTAPD_MODE_IEEE80211A;
+ mode_is_set = 1;
+ }
+
+ /* crude heuristic */
+ if (mode->channels[idx].freq < 4000)
+ if (mode->channels[idx].freq == 2484)
+ mode->channels[idx].chan = 14;
+ else
+ mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
+ else
+ mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
+
+ if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
+ mode->channels[idx].flag |=
+ HOSTAPD_CHAN_DISABLED;
+ if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
+ mode->channels[idx].flag |=
+ HOSTAPD_CHAN_PASSIVE_SCAN;
+ if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
+ mode->channels[idx].flag |=
+ HOSTAPD_CHAN_NO_IBSS;
+ if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
+ mode->channels[idx].flag |=
+ HOSTAPD_CHAN_RADAR;
+
+ if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
+ !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
+ mode->channels[idx].max_tx_power =
+ nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
+
+ idx++;
+ }
+
+ nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
+ nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
+ nla_len(nl_rate), rate_policy);
+ if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
+ continue;
+ mode->num_rates++;
+ }
+
+ mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
+ if (!mode->rates)
+ return NL_SKIP;
+
+ idx = 0;
+
+ nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
+ nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
+ nla_len(nl_rate), rate_policy);
+ if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
+ continue;
+ mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
+
+ /* crude heuristic */
+ if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
+ mode->rates[idx].rate > 200)
+ mode->mode = HOSTAPD_MODE_IEEE80211G;
+
+ if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
+ mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
+
+ idx++;
+ }
+ }
+
+ return NL_SKIP;
+}
+
+static struct hostapd_hw_modes *
+wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
+{
+ u16 m;
+ struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
+ int i, mode11g_idx = -1;
+
+ /* If only 802.11g mode is included, use it to construct matching
+ * 802.11b mode data. */
+
+ for (m = 0; m < *num_modes; m++) {
+ if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
+ return modes; /* 802.11b already included */
+ if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
+ mode11g_idx = m;
+ }
+
+ if (mode11g_idx < 0)
+ return modes; /* 2.4 GHz band not supported at all */
+
+ nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
+ if (nmodes == NULL)
+ return modes; /* Could not add 802.11b mode */
+
+ mode = &nmodes[*num_modes];
+ os_memset(mode, 0, sizeof(*mode));
+ (*num_modes)++;
+ modes = nmodes;
+
+ mode->mode = HOSTAPD_MODE_IEEE80211B;
+
+ mode11g = &modes[mode11g_idx];
+ mode->num_channels = mode11g->num_channels;
+ mode->channels = os_malloc(mode11g->num_channels *
+ sizeof(struct hostapd_channel_data));
+ if (mode->channels == NULL) {
+ (*num_modes)--;
+ return modes; /* Could not add 802.11b mode */
+ }
+ os_memcpy(mode->channels, mode11g->channels,
+ mode11g->num_channels * sizeof(struct hostapd_channel_data));
+
+ mode->num_rates = 0;
+ mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
+ if (mode->rates == NULL) {
+ os_free(mode->channels);
+ (*num_modes)--;
+ return modes; /* Could not add 802.11b mode */
+ }
+
+ for (i = 0; i < mode11g->num_rates; i++) {
+ if (mode11g->rates[i].rate > 110 ||
+ mode11g->rates[i].flags &
+ (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
+ continue;
+ mode->rates[mode->num_rates] = mode11g->rates[i];
+ mode->num_rates++;
+ if (mode->num_rates == 4)
+ break;
+ }
+
+ if (mode->num_rates == 0) {
+ os_free(mode->channels);
+ os_free(mode->rates);
+ (*num_modes)--;
+ return modes; /* No 802.11b rates */
+ }
+
+ wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
+ "information");
+
+ return modes;
+}
+
+
+static struct hostapd_hw_modes *
+wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ struct nl_msg *msg;
+ struct phy_info_arg result = {
+ .num_modes = num_modes,
+ .modes = NULL,
+ };
+
+ *num_modes = 0;
+ *flags = 0;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return NULL;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_GET_WIPHY, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
+ return wpa_driver_nl80211_add_11b(result.modes, num_modes);
+ nla_put_failure:
+ return NULL;
+}
+
+
+static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
+ const void *data, size_t len,
+ int encrypt)
+{
+ __u8 rtap_hdr[] = {
+ 0x00, 0x00, /* radiotap version */
+ 0x0e, 0x00, /* radiotap length */
+ 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
+ IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
+ 0x00, /* padding */
+ 0x00, 0x00, /* RX and TX flags to indicate that */
+ 0x00, 0x00, /* this is the injected frame directly */
+ };
+ struct iovec iov[2] = {
+ {
+ .iov_base = &rtap_hdr,
+ .iov_len = sizeof(rtap_hdr),
+ },
+ {
+ .iov_base = (void *) data,
+ .iov_len = len,
+ }
+ };
+ struct msghdr msg = {
+ .msg_name = NULL,
+ .msg_namelen = 0,
+ .msg_iov = iov,
+ .msg_iovlen = 2,
+ .msg_control = NULL,
+ .msg_controllen = 0,
+ .msg_flags = 0,
+ };
+
+ if (encrypt)
+ rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
+
+ return sendmsg(drv->monitor_sock, &msg, 0);
+}
+
+
+static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
+ size_t data_len)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ struct ieee80211_mgmt *mgmt;
+ int do_not_encrypt = 0;
+ u16 fc;
+
+ mgmt = (struct ieee80211_mgmt *) data;
+ fc = le_to_host16(mgmt->frame_control);
+
+ if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
+ WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
+ /*
+ * Only one of the authentication frame types is encrypted.
+ * In order for static WEP encryption to work properly (i.e.,
+ * to not encrypt the frame), we need to tell mac80211 about
+ * the frames that must not be encrypted.
+ */
+ u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
+ u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
+ if (auth_alg == WLAN_AUTH_OPEN ||
+ (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
+ do_not_encrypt = 1;
+ }
+
+ return wpa_driver_nl80211_send_frame(drv, data, data_len,
+ !do_not_encrypt);
+}
+
+#endif /* CONFIG_AP || HOSTAPD */
+
+
+#ifdef CONFIG_AP
+
+static int wpa_driver_nl80211_set_beacon(void *priv,
+ const u8 *head, size_t head_len,
+ const u8 *tail, size_t tail_len,
+ int dtim_period)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ struct nl_msg *msg;
+ u8 cmd = NL80211_CMD_NEW_BEACON;
+ int ret;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
+ drv->beacon_set);
+ if (drv->beacon_set)
+ cmd = NL80211_CMD_SET_BEACON;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, cmd, 0);
+ NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
+ NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+ if (!drv->beacon_int)
+ drv->beacon_int = 100;
+ NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
+ NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret) {
+ wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
+ ret, strerror(-ret));
+ } else
+ drv->beacon_set = 1;
+ return ret;
+ nla_put_failure:
+ return -ENOBUFS;
+}
+
+
+static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
+{
+ struct wpa_driver_nl80211_data *drv = priv;
+ struct nl_msg *msg;
+
+ drv->beacon_int = value;
+
+ if (!drv->beacon_set)
+ return 0;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -ENOMEM;
+
+ wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
+ "(beacon_set=%d)", value, drv->beacon_set);
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_SET_BEACON, 0);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
+
+ return send_and_recv_msgs(drv, msg, NULL, NULL);
+ nla_put_failure:
+ return -ENOBUFS;
+}
+
+
+static int wpa_driver_nl80211_set_freq2(
+ struct wpa_driver_nl80211_data *drv,
+ struct wpa_driver_associate_params *params)
+{
+ struct nl_msg *msg;
+ int ret;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
+ NL80211_CMD_SET_WIPHY, 0);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret == 0)
+ return 0;
+ wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
+ "%d (%s)", params->freq, ret, strerror(-ret));
+nla_put_failure:
+ return -1;
+}
+
+
+static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
+ int ifidx)
+{
+ struct nl_msg *msg;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ goto nla_put_failure;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_DEL_INTERFACE, 0);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
+
+ if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
+ return;
+ nla_put_failure:
+ wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
+ ifidx);
+}
+
+
+static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
+ const char *ifname, enum nl80211_iftype iftype)
+{
+ struct nl_msg *msg, *flags = NULL;
+ int ifidx;
+ int ret = -ENOBUFS;
+
+ msg = nlmsg_alloc();
+ if (!msg)
+ return -1;
+
+ genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+ 0, NL80211_CMD_NEW_INTERFACE, 0);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+ NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
+
+ if (iftype == NL80211_IFTYPE_MONITOR) {
+ int err;
+
+ flags = nlmsg_alloc();
+ if (!flags)
+ goto nla_put_failure;
+
+ NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
+
+ err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
+
+ nlmsg_free(flags);
+
+ if (err)
+ goto nla_put_failure;
+ }
+
+ ret = send_and_recv_msgs(drv, msg, NULL, NULL);
+ if (ret) {
+ nla_put_failure:
+ wpa_printf(MSG_ERROR, "Failed to create interface %s.",
+ ifname);
+ return ret;
+ }
+
+ ifidx = if_nametoindex(ifname);
+
+ if (ifidx <= 0)
+ return -1;
+
+ return ifidx;
+}
+
+
+enum ieee80211_msg_type {
+ ieee80211_msg_normal = 0,
+ ieee80211_msg_tx_callback_ack = 1,
+ ieee80211_msg_tx_callback_fail = 2,
+};
+
+
+void ap_tx_status(void *ctx, const u8 *addr,
+ const u8 *buf, size_t len, int ack);
+void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
+void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
+ struct hostapd_frame_info *fi);
+void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
+
+
+static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
+{
+ struct ieee80211_hdr *hdr;
+ u16 fc, type, stype;
+
+ hdr = (struct ieee80211_hdr *) buf;
+ fc = le_to_host16(hdr->frame_control);
+
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+
+ switch (type) {
+ case WLAN_FC_TYPE_MGMT:
+ wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
+ ok ? "ACK" : "fail");
+ ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
+ break;
+ case WLAN_FC_TYPE_CTRL:
+ wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
+ ok ? "ACK" : "fail");
+ break;
+ case WLAN_FC_TYPE_DATA:
+ ap_tx_status(ctx, hdr->addr1, buf, len, ok);
+ break;
+ default:
+ wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
+ type);
+ break;
+ }
+}
+
+
+static void handle_frame(struct wpa_driver_nl80211_data *drv,
+ u8 *buf, size_t len,
+ struct hostapd_frame_info *hfi,
+ enum ieee80211_msg_type msg_type)
+{
+ struct ieee80211_hdr *hdr;
+ u16 fc, type, stype;
+ size_t data_len = len;
+
+ /*
+ * PS-Poll frames are 16 bytes. All other frames are
+ * 24 bytes or longer.
+ */
+ if (len < 16)
+ return;
+
+ hdr = (struct ieee80211_hdr *) buf;
+ fc = le_to_host16(hdr->frame_control);
+
+ type = WLAN_FC_GET_TYPE(fc);
+ stype = WLAN_FC_GET_STYPE(fc);
+
+ switch (type) {
+ case WLAN_FC_TYPE_DATA:
+ if (len < 24)
+ return;
+ switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
+ case WLAN_FC_TODS:
+ break;
+ case WLAN_FC_FROMDS:
+ break;
+ default:
+ /* discard */
+ return;
+ }
+ break;
+ case WLAN_FC_TYPE_CTRL:
+ /* discard non-ps-poll frames */
+ if (stype != WLAN_FC_STYPE_PSPOLL)
+ return;
+ break;
+ case WLAN_FC_TYPE_MGMT:
+ break;
+ default:
+ /* discard */
+ return;
+ }
+
+ switch (msg_type) {
+ case ieee80211_msg_normal:
+ /* continue processing */
+ break;
+ case ieee80211_msg_tx_callback_ack:
+ handle_tx_callback(drv->ctx, buf, data_len, 1);
+ return;
+ case ieee80211_msg_tx_callback_fail:
+ handle_tx_callback(drv->ctx, buf, data_len, 0);
+ return;
+ }
+
+ switch (type) {
+ case WLAN_FC_TYPE_MGMT:
+ if (stype != WLAN_FC_STYPE_BEACON &&
+ stype != WLAN_FC_STYPE_PROBE_REQ)
+ wpa_printf(MSG_MSGDUMP, "MGMT");
+ ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
+ break;
+ case WLAN_FC_TYPE_CTRL:
+ /* can only get here with PS-Poll frames */
+ wpa_printf(MSG_DEBUG, "CTRL");
+ ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
+ break;
+ case WLAN_FC_TYPE_DATA:
+ ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
+ break;
+ }
+}
+
+
+static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
+{
+ struct wpa_driver_nl80211_data *drv = eloop_ctx;
+ int len;
+ unsigned char buf[3000];
+ struct ieee80211_radiotap_iterator iter;
+ int ret;
+ struct hostapd_frame_info hfi;
+ int injected = 0, failed = 0, msg_type, rxflags = 0;
+
+ len = recv(sock, buf, sizeof(buf), 0);
+ if (len < 0) {
+ perror("recv");
+ return;
+ }
+
+ if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
+ printf("received invalid radiotap frame\n");
+ return;
+ }
+
+ memset(&hfi, 0, sizeof(hfi));
+
+ while (1) {
+ ret = ieee80211_radiotap_iterator_next(&iter);
+ if (ret == -ENOENT)
+ break;
+ if (ret) {
+ printf("received invalid radiotap frame (%d)\n", ret);
+ return;
+ }
+ switch (iter.this_arg_index) {
+ case IEEE80211_RADIOTAP_FLAGS:
+ if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
+ len -= 4;
+ break;
+ case IEEE80211_RADIOTAP_RX_FLAGS:
+ rxflags = 1;
+ break;
+ case IEEE80211_RADIOTAP_TX_FLAGS:
+ injected = 1;
+ failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
+ IEEE80211_RADIOTAP_F_TX_FAIL;
+ break;
+ case IEEE80211_RADIOTAP_DATA_RETRIES:
+ break;
+ case IEEE80211_RADIOTAP_CHANNEL:
+ /* TODO convert from freq/flags to channel number
+ hfi.channel = XXX;
+ hfi.phytype = XXX;
+ */
+ break;
+ case IEEE80211_RADIOTAP_RATE:
+ hfi.datarate = *iter.this_arg * 5;
+ break;
+ case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
+ hfi.ssi_signal = *iter.this_arg;
+ break;
+ }
+ }
+
+ if (rxflags && injected)
+ return;
+
+ if (!injected)
+ msg_type = ieee80211_msg_normal;
+ else if (failed)
+ msg_type = ieee80211_msg_tx_callback_fail;
+ else
+ msg_type = ieee80211_msg_tx_callback_ack;
+
+ handle_frame(drv, buf + iter.max_length,
+ len - iter.max_length, &hfi, msg_type);
+}
+
+
+/*
+ * we post-process the filter code later and rewrite
+ * this to the offset to the last instruction
+ */
+#define PASS 0xFF
+#define FAIL 0xFE
+
+static struct sock_filter msock_filter_insns[] = {
+ /*
+ * do a little-endian load of the radiotap length field
+ */
+ /* load lower byte into A */
+ BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
+ /* put it into X (== index register) */
+ BPF_STMT(BPF_MISC| BPF_TAX, 0),
+ /* load upper byte into A */
+ BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 3),
+ /* left-shift it by 8 */
+ BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
+ /* or with X */
+ BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
+ /* put result into X */
+ BPF_STMT(BPF_MISC| BPF_TAX, 0),
+
+ /*
+ * Allow management frames through, this also gives us those
+ * management frames that we sent ourselves with status
+ */
+ /* load the lower byte of the IEEE 802.11 frame control field */
+ BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
+ /* mask off frame type and version */
+ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
+ /* accept frame if it's both 0, fall through otherwise */
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
+
+ /*
+ * TODO: add a bit to radiotap RX flags that indicates
+ * that the sending station is not associated, then
+ * add a filter here that filters on our DA and that flag
+ * to allow us to deauth frames to that bad station.
+ *
+ * Not a regression -- we didn't do it before either.
+ */
+
+#if 0
+ /*
+ * drop non-data frames, WDS frames
+ */
+ /* load the lower byte of the frame control field */
+ BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
+ /* mask off QoS bit */
+ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x0c),
+ /* drop non-data frames */
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 8, 0, FAIL),
+ /* load the upper byte of the frame control field */
+ BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
+ /* mask off toDS/fromDS */
+ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x03),
+ /* drop WDS frames */
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 3, FAIL, 0),
+#endif
+
+ /*
+ * add header length to index
+ */
+ /* load the lower byte of the frame control field */
+ BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
+ /* mask off QoS bit */
+ BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0x80),
+ /* right shift it by 6 to give 0 or 2 */
+ BPF_STMT(BPF_ALU | BPF_RSH | BPF_K, 6),
+ /* add data frame header length */
+ BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 24),
+ /* add index, was start of 802.11 header */
+ BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
+ /* move to index, now start of LL header */
+ BPF_STMT(BPF_MISC | BPF_TAX, 0),
+
+ /*
+ * Accept empty data frames, we use those for
+ * polling activity.
+ */
+ BPF_STMT(BPF_LD | BPF_W | BPF_LEN, 0),
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
+
+ /*
+ * Accept EAPOL frames
+ */
+ BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
+ BPF_STMT(BPF_LD | BPF_W | BPF_IND, 4),
+ BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
+
+ /* keep these last two statements or change the code below */
+ /* return 0 == "DROP" */
+ BPF_STMT(BPF_RET | BPF_K, 0),
+ /* return ~0 == "keep all" */
+ BPF_STMT(BPF_RET | BPF_K, ~0),
+};
+
+static struct sock_fprog msock_filter = {
+ .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
+ .filter = msock_filter_insns,
+};
+
+
+static int add_monitor_filter(int s)
+{
+ int idx;
+
+ /* rewrite all PASS/FAIL jump offsets */
+ for (idx = 0; idx < msock_filter.len; idx++) {
+ struct sock_filter *insn = &msock_filter_insns[idx];
+
+ if (BPF_CLASS(insn->code) == BPF_JMP) {
+ if (insn->code == (BPF_JMP|BPF_JA)) {
+ if (insn->k == PASS)
+ insn->k = msock_filter.len - idx - 2;
+ else if (insn->k == FAIL)
+ insn->k = msock_filter.len - idx - 3;
+ }
+
+ if (insn->jt == PASS)
+ insn->jt = msock_filter.len - idx - 2;
+ else if (insn->jt == FAIL)
+ insn->jt = msock_filter.len - idx - 3;
+
+ if (insn->jf == PASS)
+ insn->jf = msock_filter.len - idx - 2;
+ else if (insn->jf == FAIL)
+ insn->jf = msock_filter.len - idx - 3;
+ }
+ }
+
+ if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
+ &msock_filter, sizeof(msock_filter))) {
+ perror("SO_ATTACH_FILTER");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static int
+nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
+{
+ char buf[IFNAMSIZ];
+ struct sockaddr_ll ll;
+ int optval;
+ socklen_t optlen;
+ int flags;
+
+ snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
+ buf[IFNAMSIZ - 1] = '\0';
+
+ drv->monitor_ifidx =
+ nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
+
+ if (drv->monitor_ifidx < 0)
+ return -1;
+
+ if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0) {
+ wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
+ buf);
+ goto error;
+ }
+ if (!(flags & IFF_UP)) {
+ if (wpa_driver_nl80211_set_ifflags_ifname(drv, buf,
+ flags | IFF_UP) != 0)
+ {
+ wpa_printf(MSG_ERROR, "Could not set interface '%s' "
+ "UP", buf);
+ goto error;
+ }
+ }
+
+ memset(&ll, 0, sizeof(ll));
+ ll.sll_family = AF_PACKET;
+ ll.sll_ifindex = drv->monitor_ifidx;
+ drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+ if (drv->monitor_sock < 0) {
+ perror("socket[PF_PACKET,SOCK_RAW]");
+ goto error;
+ }
+
+ if (add_monitor_filter(drv->monitor_sock)) {
+ wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
+ "interface; do filtering in user space");
+ /* This works, but will cost in performance. */
+ }
+
+ if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
+ sizeof(ll)) < 0) {
+ perror("monitor socket bind");
+ goto error;
+ }
+
+ optlen = sizeof(optval);
+ optval = 20;
+ if (setsockopt
+ (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
+ perror("Failed to set socket priority");
+ goto error;
+ }
+
+ if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
+ drv, NULL)) {
+ printf("Could not register monitor read socket\n");
+ goto error;
+ }
+
+ return 0;
+ error:
+ nl80211_remove_iface(drv, drv->monitor_ifidx);
+ return -1;
+}
+
+
+static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
+ struct wpa_driver_associate_params *params)
+{
+ if (drv->monitor_ifidx < 0 &&
+ nl80211_create_monitor_interface(drv))
+ return -1;
+
+ if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
+ wpa_driver_nl80211_set_freq2(drv, params)) {
+ nl80211_remove_iface(drv, drv->monitor_ifidx);
+ drv->monitor_ifidx = -1;
+ return -1;