P2P: Add driver operations for P2P use
[mech_eap.git] / src / drivers / driver_nl80211.c
index 877cde0..4ab6539 100644 (file)
@@ -33,6 +33,7 @@
 #include "linux_ioctl.h"
 #include "radiotap.h"
 #include "radiotap_iter.h"
+#include "rfkill.h"
 #include "driver.h"
 
 #ifdef CONFIG_LIBNL20
@@ -72,6 +73,8 @@ struct wpa_driver_nl80211_data {
        char brname[IFNAMSIZ];
        int ifindex;
        int if_removed;
+       int if_disabled;
+       struct rfkill_data *rfkill;
        struct wpa_driver_capa capa;
        int has_capability;
 
@@ -101,7 +104,6 @@ struct wpa_driver_nl80211_data {
        int disable_11b_rates;
 
        unsigned int pending_remain_on_chan:1;
-       unsigned int pending_send_action:1;
        unsigned int added_bridge:1;
        unsigned int added_if_into_bridge:1;
 
@@ -140,9 +142,15 @@ static void nl80211_remove_monitor_interface(
 #ifdef HOSTAPD
 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
+static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 static int wpa_driver_nl80211_if_remove(void *priv,
                                        enum wpa_driver_if_type type,
                                        const char *ifname);
+#else /* HOSTAPD */
+static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
+{
+       return 0;
+}
 #endif /* HOSTAPD */
 
 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
@@ -389,10 +397,12 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
        struct wpa_driver_nl80211_data *drv = ctx;
        int attrlen, rta_len;
        struct rtattr *attr;
+       u32 brid = 0;
 
-       if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
-               wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
-                          ifi->ifi_index);
+       if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
+           !have_ifidx(drv, ifi->ifi_index)) {
+               wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
+                          "ifindex %d", ifi->ifi_index);
                return;
        }
 
@@ -403,6 +413,19 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
                   (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
                   (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
                   (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
+
+       if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
+               wpa_printf(MSG_DEBUG, "nl80211: Interface down");
+               drv->if_disabled = 1;
+               wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
+       }
+
+       if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
+               wpa_printf(MSG_DEBUG, "nl80211: Interface up");
+               drv->if_disabled = 0;
+               wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
+       }
+
        /*
         * Some drivers send the association event before the operup event--in
         * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
@@ -424,9 +447,21 @@ static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
                                drv,
                                ((char *) attr) + rta_len,
                                attr->rta_len - rta_len, 0);
-               }
+               } else if (attr->rta_type == IFLA_MASTER)
+                       brid = nla_get_u32((struct nlattr *) attr);
                attr = RTA_NEXT(attr, attrlen);
        }
+
+#ifdef HOSTAPD
+       if (ifi->ifi_family == AF_BRIDGE && brid) {
+               /* device has been added to bridge */
+               char namebuf[IFNAMSIZ];
+               if_indextoname(brid, namebuf);
+               wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
+                          brid, namebuf);
+               add_ifidx(drv, brid);
+       }
+#endif /* HOSTAPD */
 }
 
 
@@ -437,6 +472,7 @@ static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
        struct wpa_driver_nl80211_data *drv = ctx;
        int attrlen, rta_len;
        struct rtattr *attr;
+       u32 brid = 0;
 
        attrlen = len;
        attr = (struct rtattr *) buf;
@@ -448,9 +484,21 @@ static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
                                drv,
                                ((char *) attr) + rta_len,
                                attr->rta_len - rta_len, 1);
-               }
+               } else if (attr->rta_type == IFLA_MASTER)
+                       brid = nla_get_u32((struct nlattr *) attr);
                attr = RTA_NEXT(attr, attrlen);
        }
+
+#ifdef HOSTAPD
+       if (ifi->ifi_family == AF_BRIDGE && brid) {
+               /* device has been removed from bridge */
+               char namebuf[IFNAMSIZ];
+               if_indextoname(brid, namebuf);
+               wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
+                          "%s", brid, namebuf);
+               del_ifidx(drv, brid);
+       }
+#endif /* HOSTAPD */
 }
 
 
@@ -639,10 +687,11 @@ static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
                return;
 
        cookie_val = nla_get_u64(cookie);
-       wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
+       wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
+                  "(ack=%d)",
                   (long long unsigned int) cookie_val,
                   cookie_val == drv->send_action_cookie ?
-                  " (match)" : " (unknown)");
+                  " (match)" : " (unknown)", ack != NULL);
        if (cookie_val != drv->send_action_cookie)
                return;
 
@@ -669,12 +718,28 @@ static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
        const u8 *bssid = NULL;
        u16 reason_code = 0;
 
+       mgmt = (const struct ieee80211_mgmt *) frame;
+       if (len >= 24) {
+               bssid = mgmt->bssid;
+
+               if (drv->associated != 0 &&
+                   os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
+                   os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
+                       /*
+                        * We have presumably received this deauth as a
+                        * response to a clear_state_mismatch() outgoing
+                        * deauth.  Don't let it take us offline!
+                        */
+                       wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
+                                  "from Unknown BSSID " MACSTR " -- ignoring",
+                                  MAC2STR(bssid));
+                       return;
+               }
+       }
+
        drv->associated = 0;
        os_memset(&event, 0, sizeof(event));
 
-       mgmt = (const struct ieee80211_mgmt *) frame;
-       if (len >= 24)
-               bssid = mgmt->bssid;
        /* Note: Same offset for Reason Code in both frame subtypes */
        if (len >= 24 + sizeof(mgmt->u.deauth))
                reason_code = le_to_host16(mgmt->u.deauth.reason_code);
@@ -881,6 +946,53 @@ static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 }
 
 
+static int get_link_signal(struct nl_msg *msg, void *arg)
+{
+       struct nlattr *tb[NL80211_ATTR_MAX + 1];
+       struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+       struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
+       static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
+               [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
+       };
+       int *sig = arg;
+
+       nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+                 genlmsg_attrlen(gnlh, 0), NULL);
+       if (!tb[NL80211_ATTR_STA_INFO] ||
+           nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
+                            tb[NL80211_ATTR_STA_INFO], policy))
+               return NL_SKIP;
+       if (!sinfo[NL80211_STA_INFO_SIGNAL])
+               return NL_SKIP;
+
+       *sig = (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
+       return NL_SKIP;
+}
+
+
+static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
+                                  int *sig)
+{
+       struct nl_msg *msg;
+
+       *sig = -9999;
+
+       msg = nlmsg_alloc();
+       if (!msg)
+               return -ENOMEM;
+
+       genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
+                   0, NL80211_CMD_GET_STATION, 0);
+
+       NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
+       NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
+
+       return send_and_recv_msgs(drv, msg, get_link_signal, sig);
+ nla_put_failure:
+       return -ENOBUFS;
+}
+
+
 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
                              struct nlattr *tb[])
 {
@@ -892,6 +1004,7 @@ static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
        struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
        enum nl80211_cqm_rssi_threshold_event event;
        union wpa_event_data ed;
+       int sig, res;
 
        if (tb[NL80211_ATTR_CQM] == NULL ||
            nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
@@ -917,6 +1030,12 @@ static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
        } else
                return;
 
+       res = nl80211_get_link_signal(drv, &sig);
+       if (res == 0) {
+               ed.signal_change.current_signal = sig;
+               wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm", sig);
+       }
+
        wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
 }
 
@@ -933,7 +1052,7 @@ static int process_event(struct nl_msg *msg, void *arg)
 
        if (tb[NL80211_ATTR_IFINDEX]) {
                int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
-               if (ifindex != drv->ifindex) {
+               if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
                        wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
                                   " for foreign interface (ifindex %d)",
                                   gnlh->cmd, ifindex);
@@ -1200,8 +1319,7 @@ static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 #endif /* HOSTAPD */
 
 
-static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
-                                     void *ctx)
+static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
 {
        int ret;
 
@@ -1295,7 +1413,7 @@ static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
        }
 
        eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
-                                wpa_driver_nl80211_event_receive, drv, ctx);
+                                wpa_driver_nl80211_event_receive, drv, NULL);
 
        return 0;
 
@@ -1314,6 +1432,29 @@ err1:
 }
 
 
+static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
+{
+       wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
+       /*
+        * This may be for any interface; use ifdown event to disable
+        * interface.
+        */
+}
+
+
+static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
+{
+       struct wpa_driver_nl80211_data *drv = ctx;
+       wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
+       if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
+               wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
+                          "after rfkill unblock");
+               return;
+       }
+       /* rtnetlink ifup handler will report interface as enabled */
+}
+
+
 /**
  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
  * @ctx: context to be used when calling wpa_supplicant functions,
@@ -1325,6 +1466,7 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
 {
        struct wpa_driver_nl80211_data *drv;
        struct netlink_config *cfg;
+       struct rfkill_config *rcfg;
        struct i802_bss *bss;
 
        drv = os_zalloc(sizeof(*drv));
@@ -1338,7 +1480,7 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
        drv->monitor_sock = -1;
        drv->ioctl_sock = -1;
 
-       if (wpa_driver_nl80211_init_nl(drv, ctx)) {
+       if (wpa_driver_nl80211_init_nl(drv)) {
                os_free(drv);
                return NULL;
        }
@@ -1360,12 +1502,27 @@ static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
                os_free(cfg);
                goto failed;
        }
+
+       rcfg = os_zalloc(sizeof(*rcfg));
+       if (rcfg == NULL)
+               goto failed;
+       rcfg->ctx = drv;
+       os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
+       rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
+       rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
+       drv->rfkill = rfkill_init(rcfg);
+       if (drv->rfkill == NULL) {
+               wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
+               os_free(rcfg);
+       }
+
        if (wpa_driver_nl80211_finish_drv_init(drv))
                goto failed;
 
        return bss;
 
 failed:
+       rfkill_deinit(drv->rfkill);
        netlink_deinit(drv->netlink);
        if (drv->ioctl_sock >= 0)
                close(drv->ioctl_sock);
@@ -1426,10 +1583,17 @@ static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
 }
 
 
+static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
+{
+       wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
+}
+
+
 static int
 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
 {
        struct i802_bss *bss = &drv->first_bss;
+       int send_rfkill_event = 0;
 
        drv->ifindex = if_nametoindex(bss->ifname);
        drv->first_bss.ifindex = drv->ifindex;
@@ -1441,9 +1605,17 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
        }
 
        if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
-               wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
-                          bss->ifname);
-               return -1;
+               if (rfkill_is_blocked(drv->rfkill)) {
+                       wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
+                                  "interface '%s' due to rfkill",
+                                  bss->ifname);
+                       drv->if_disabled = 1;
+                       send_rfkill_event = 1;
+               } else {
+                       wpa_printf(MSG_ERROR, "nl80211: Could not set "
+                                  "interface '%s' UP", bss->ifname);
+                       return -1;
+               }
        }
 
        if (wpa_driver_nl80211_capa(drv))
@@ -1463,6 +1635,11 @@ wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
                 */
        }
 
+       if (send_rfkill_event) {
+               eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
+                                      drv, drv->ctx);
+       }
+
        return 0;
 }
 
@@ -1539,6 +1716,7 @@ static void wpa_driver_nl80211_deinit(void *priv)
 
        netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
        netlink_deinit(drv->netlink);
+       rfkill_deinit(drv->rfkill);
 
        eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
 
@@ -2288,7 +2466,8 @@ nla_put_failure:
 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
                                         const u8 *addr, int reason_code)
 {
-       wpa_printf(MSG_DEBUG, "%s", __func__);
+       wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
+                  __func__, MAC2STR(addr), reason_code);
        drv->associated = 0;
        return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
                                       reason_code, 0);
@@ -2302,7 +2481,8 @@ static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
        struct wpa_driver_nl80211_data *drv = bss->drv;
        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
                return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
-       wpa_printf(MSG_DEBUG, "%s", __func__);
+       wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
+                  __func__, MAC2STR(addr), reason_code);
        drv->associated = 0;
        return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
                                       reason_code, 0);
@@ -2389,10 +2569,6 @@ retry:
        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 & WPA_AUTH_ALG_OPEN)
                type = NL80211_AUTHTYPE_OPEN_SYSTEM;
        else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
@@ -3959,6 +4135,7 @@ static int wpa_driver_nl80211_set_mode(void *priv, int mode)
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = -1;
        int nlmode;
+       int i;
 
        switch (mode) {
        case 0:
@@ -3991,11 +4168,23 @@ static int wpa_driver_nl80211_set_mode(void *priv, int mode)
         * take the device down, try to set the mode again, and bring the
         * device back up.
         */
-       if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
-               /* Try to set the mode again while the interface is down */
-               ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
-               if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
-                       ret = -1;
+       wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
+                  "interface down");
+       for (i = 0; i < 10; i++) {
+               if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
+                   0) {
+                       /* Try to set the mode again while the interface is
+                        * down */
+                       ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
+                       if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
+                                                 1))
+                               ret = -1;
+                       if (!ret)
+                               break;
+               } else
+                       wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
+                                  "interface down");
+               os_sleep(0, 100000);
        }
 
        if (!ret) {
@@ -4111,7 +4300,9 @@ static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
                           "interfaces");
                wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
                return;
-       }
+       } else if (!old)
+               os_memcpy(drv->if_indices, drv->default_if_indices,
+                         sizeof(drv->default_if_indices));
        drv->if_indices[drv->num_if_indices] = ifidx;
        drv->num_if_indices++;
 }
@@ -4794,10 +4985,13 @@ static enum nl80211_iftype wpa_driver_nl80211_if_type(
 {
        switch (type) {
        case WPA_IF_STATION:
+       case WPA_IF_P2P_CLIENT:
+       case WPA_IF_P2P_GROUP:
                return NL80211_IFTYPE_STATION;
        case WPA_IF_AP_VLAN:
                return NL80211_IFTYPE_AP_VLAN;
        case WPA_IF_AP_BSS:
+       case WPA_IF_P2P_GO:
                return NL80211_IFTYPE_AP;
        }
        return -1;
@@ -4967,7 +5161,6 @@ static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
        wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
                   "cookie 0x%llx", (long long unsigned int) cookie);
        drv->send_action_cookie = cookie;
-       drv->pending_send_action = 1;
        ret = 0;
 
 nla_put_failure:
@@ -5007,7 +5200,8 @@ static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
                return 0;
        }
        wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
-                  "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
+                  "(freq=%d duration=%u): %d (%s)",
+                  freq, duration, ret, strerror(-ret));
 nla_put_failure:
        return -1;
 }