static inline void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata) { atomic_dec(&sdata->u.mesh.mshstats.estab_plinks); mesh_accept_plinks_update(sdata); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); }
/** * mesh_plink_deactivate - deactivate mesh peer link * * @sta: mesh peer link to deactivate * * All mesh paths with this peer as next hop will be flushed */ void mesh_plink_deactivate(struct sta_info *sta) { struct ieee80211_sub_if_data *sdata = sta->sdata; bool deactivated; spin_lock_bh(&sta->lock); deactivated = __mesh_plink_deactivate(sta); spin_unlock_bh(&sta->lock); if (deactivated) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); }
/** * mesh_plink_deactivate - deactivate mesh peer link * * @sta: mesh peer link to deactivate * * All mesh paths with this peer as next hop will be flushed */ void mesh_plink_deactivate(struct sta_info *sta) { struct ieee80211_sub_if_data *sdata = sta->sdata; bool deactivated; spin_lock_bh(&sta->lock); deactivated = __mesh_plink_deactivate(sta); sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, sta->llid, sta->plid, sta->reason); spin_unlock_bh(&sta->lock); if (deactivated) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); }
static int ieee80211_ifa_changed(struct notifier_block *nb, unsigned long data, void *arg) { struct in_ifaddr *ifa = arg; struct ieee80211_local *local = container_of(nb, struct ieee80211_local, ifa_notifier); struct net_device *ndev = ifa->ifa_dev->dev; struct wireless_dev *wdev = ndev->ieee80211_ptr; struct in_device *idev; struct ieee80211_sub_if_data *sdata; struct ieee80211_bss_conf *bss_conf; struct ieee80211_if_managed *ifmgd; int c = 0; /* Make sure it's our interface that got changed */ if (!wdev) return NOTIFY_DONE; if (wdev->wiphy != local->hw.wiphy) return NOTIFY_DONE; sdata = IEEE80211_DEV_TO_SUB_IF(ndev); bss_conf = &sdata->vif.bss_conf; if (!ieee80211_sdata_running(sdata)) return NOTIFY_DONE; /* ARP filtering is only supported in managed mode */ if (sdata->vif.type != NL80211_IFTYPE_STATION) return NOTIFY_DONE; idev = __in_dev_get_rtnl(sdata->dev); if (!idev) return NOTIFY_DONE; ifmgd = &sdata->u.mgd; mutex_lock(&ifmgd->mtx); /* Copy the addresses to the bss_conf list */ ifa = idev->ifa_list; while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { bss_conf->arp_addr_list[c] = ifa->ifa_address; ifa = ifa->ifa_next; c++; } /* If not all addresses fit the list, disable filtering */ if (ifa) { sdata->arp_filter_state = false; c = 0; } else { sdata->arp_filter_state = true; } bss_conf->arp_addr_cnt = c; /* Configure driver only if associated */ if (ifmgd->associated) { bss_conf->arp_filter_enabled = sdata->arp_filter_state; ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_ARP_FILTER); } mutex_unlock(&ifmgd->mtx); return NOTIFY_DONE; }
void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len, struct ieee80211_rx_status *rx_status) { struct ieee80211_local *local = sdata->local; struct ieee802_11_elems elems; struct sta_info *sta; enum plink_event event; enum plink_frame_type ftype; size_t baselen; bool deactivated, matches_local = true; u8 ie_len; u8 *baseaddr; __le16 plid, llid, reason; #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG static const char *mplstates[] = { [PLINK_LISTEN] = "LISTEN", [PLINK_OPN_SNT] = "OPN-SNT", [PLINK_OPN_RCVD] = "OPN-RCVD", [PLINK_CNF_RCVD] = "CNF_RCVD", [PLINK_ESTAB] = "ESTAB", [PLINK_HOLDING] = "HOLDING", [PLINK_BLOCKED] = "BLOCKED" }; #endif /* need action_code, aux */ if (len < IEEE80211_MIN_ACTION_SIZE + 3) return; if (is_multicast_ether_addr(mgmt->da)) { mpl_dbg("Mesh plink: ignore frame from multicast address"); return; } baseaddr = mgmt->u.action.u.plink_action.variable; baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { baseaddr += 4; baselen += 4; } ieee802_11_parse_elems(baseaddr, len - baselen, &elems); if (!elems.peer_link) { mpl_dbg("Mesh plink: missing necessary peer link ie\n"); return; } ftype = mgmt->u.action.u.plink_action.action_code; ie_len = elems.peer_link_len; if ((ftype == PLINK_OPEN && ie_len != 6) || (ftype == PLINK_CONFIRM && ie_len != 8) || (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) { mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", ftype, ie_len); return; } if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { mpl_dbg("Mesh plink: missing necessary ie\n"); return; } /* Note the lines below are correct, the llid in the frame is the plid * from the point of view of this host. */ memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10)) memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); rcu_read_lock(); sta = sta_info_get(sdata, mgmt->sa); if (!sta && ftype != PLINK_OPEN) { mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); rcu_read_unlock(); return; } if (sta && sta->plink_state == PLINK_BLOCKED) { rcu_read_unlock(); return; } /* Now we will figure out the appropriate event... */ event = PLINK_UNDEFINED; if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { matches_local = false; switch (ftype) { case PLINK_OPEN: event = OPN_RJCT; break; case PLINK_CONFIRM: event = CNF_RJCT; break; case PLINK_CLOSE: /* avoid warning */ break; } } if (!sta && !matches_local) { rcu_read_unlock(); reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); llid = 0; mesh_plink_frame_tx(sdata, PLINK_CLOSE, mgmt->sa, llid, plid, reason); return; } else if (!sta) { /* ftype == PLINK_OPEN */ u32 rates; rcu_read_unlock(); if (!mesh_plink_free_count(sdata)) { mpl_dbg("Mesh plink error: no more free plinks\n"); return; } rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); sta = mesh_plink_alloc(sdata, mgmt->sa, rates); if (!sta) { mpl_dbg("Mesh plink error: plink table full\n"); return; } if (sta_info_insert_rcu(sta)) { rcu_read_unlock(); return; } event = OPN_ACPT; spin_lock_bh(&sta->lock); } else if (matches_local) { spin_lock_bh(&sta->lock); switch (ftype) { case PLINK_OPEN: if (!mesh_plink_free_count(sdata) || (sta->plid && sta->plid != plid)) event = OPN_IGNR; else event = OPN_ACPT; break; case PLINK_CONFIRM: if (!mesh_plink_free_count(sdata) || (sta->llid != llid || sta->plid != plid)) event = CNF_IGNR; else event = CNF_ACPT; break; case PLINK_CLOSE: if (sta->plink_state == PLINK_ESTAB) /* Do not check for llid or plid. This does not * follow the standard but since multiple plinks * per sta are not supported, it is necessary in * order to avoid a livelock when MP A sees an * establish peer link to MP B but MP B does not * see it. This can be caused by a timeout in * B's peer link establishment or B beign * restarted. */ event = CLS_ACPT; else if (sta->plid != plid) event = CLS_IGNR; else if (ie_len == 7 && sta->llid != llid) event = CLS_IGNR; else event = CLS_ACPT; break; default: mpl_dbg("Mesh plink: unknown frame subtype\n"); spin_unlock_bh(&sta->lock); rcu_read_unlock(); return; } } else { spin_lock_bh(&sta->lock); } mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", mgmt->sa, mplstates[sta->plink_state], le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), event); reason = 0; switch (sta->plink_state) { /* spin_unlock as soon as state is updated at each case */ case PLINK_LISTEN: switch (event) { case CLS_ACPT: mesh_plink_fsm_restart(sta); spin_unlock_bh(&sta->lock); break; case OPN_ACPT: sta->plink_state = PLINK_OPN_RCVD; sta->plid = plid; get_random_bytes(&llid, 2); sta->llid = llid; mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, 0, 0); mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case PLINK_OPN_SNT: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); case CLS_ACPT: if (!reason) reason = cpu_to_le16(MESH_CLOSE_RCVD); sta->reason = reason; sta->plink_state = PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: /* retry timer is left untouched */ sta->plink_state = PLINK_OPN_RCVD; sta->plid = plid; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: sta->plink_state = PLINK_CNF_RCVD; if (!mod_plink_timer(sta, dot11MeshConfirmTimeout(sdata))) sta->ignore_plink_timer = true; spin_unlock_bh(&sta->lock); break; default: spin_unlock_bh(&sta->lock); break; } break; case PLINK_OPN_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); case CLS_ACPT: if (!reason) reason = cpu_to_le16(MESH_CLOSE_RCVD); sta->reason = reason; sta->plink_state = PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: del_timer(&sta->plink_timer); sta->plink_state = PLINK_ESTAB; spin_unlock_bh(&sta->lock); mesh_plink_inc_estab_count(sdata); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mpl_dbg("Mesh plink with %pM ESTABLISHED\n", sta->sta.addr); break; default: spin_unlock_bh(&sta->lock); break; } break; case PLINK_CNF_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); case CLS_ACPT: if (!reason) reason = cpu_to_le16(MESH_CLOSE_RCVD); sta->reason = reason; sta->plink_state = PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: del_timer(&sta->plink_timer); sta->plink_state = PLINK_ESTAB; spin_unlock_bh(&sta->lock); mesh_plink_inc_estab_count(sdata); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mpl_dbg("Mesh plink with %pM ESTABLISHED\n", sta->sta.addr); mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case PLINK_ESTAB: switch (event) { case CLS_ACPT: reason = cpu_to_le16(MESH_CLOSE_RCVD); sta->reason = reason; deactivated = __mesh_plink_deactivate(sta); sta->plink_state = PLINK_HOLDING; llid = sta->llid; mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); spin_unlock_bh(&sta->lock); if (deactivated) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case PLINK_HOLDING: switch (event) { case CLS_ACPT: if (del_timer(&sta->plink_timer)) sta->ignore_plink_timer = 1; mesh_plink_fsm_restart(sta); spin_unlock_bh(&sta->lock); break; case OPN_ACPT: case CNF_ACPT: case OPN_RJCT: case CNF_RJCT: llid = sta->llid; reason = sta->reason; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, reason); break; default: spin_unlock_bh(&sta->lock); } break; default: /* should not get here, PLINK_BLOCKED is dealt with at the * beginning of the function */ spin_unlock_bh(&sta->lock); break; } rcu_read_unlock(); }
void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len, struct ieee80211_rx_status *rx_status) { struct ieee80211_local *local = sdata->local; struct ieee802_11_elems elems; struct sta_info *sta; enum plink_event event; enum ieee80211_self_protected_actioncode ftype; size_t baselen; bool deactivated, matches_local = true; u8 ie_len; u8 *baseaddr; __le16 plid, llid, reason; #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG static const char *mplstates[] = { [NL80211_PLINK_LISTEN] = "LISTEN", [NL80211_PLINK_OPN_SNT] = "OPN-SNT", [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD", [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD", [NL80211_PLINK_ESTAB] = "ESTAB", [NL80211_PLINK_HOLDING] = "HOLDING", [NL80211_PLINK_BLOCKED] = "BLOCKED" }; #endif /* */ if (len < IEEE80211_MIN_ACTION_SIZE + 3) return; if (is_multicast_ether_addr(mgmt->da)) { mpl_dbg("Mesh plink: ignore frame from multicast address"); return; } baseaddr = mgmt->u.action.u.self_prot.variable; baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; if (mgmt->u.action.u.self_prot.action_code == WLAN_SP_MESH_PEERING_CONFIRM) { baseaddr += 4; baselen += 4; } ieee802_11_parse_elems(baseaddr, len - baselen, &elems); if (!elems.peering) { mpl_dbg("Mesh plink: missing necessary peer link ie\n"); return; } if (elems.rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { mpl_dbg("Mesh plink: can't establish link with secure peer\n"); return; } ftype = mgmt->u.action.u.self_prot.action_code; ie_len = elems.peering_len; if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 && ie_len != 8)) { mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", ftype, ie_len); return; } if (ftype != WLAN_SP_MESH_PEERING_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { mpl_dbg("Mesh plink: missing necessary ie\n"); return; } /* */ memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); rcu_read_lock(); sta = sta_info_get(sdata, mgmt->sa); if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); rcu_read_unlock(); return; } if (ftype == WLAN_SP_MESH_PEERING_OPEN && !rssi_threshold_check(sta, sdata)) { mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n", mgmt->sa); rcu_read_unlock(); return; } if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) { mpl_dbg("Mesh plink: Action frame from non-authed peer\n"); rcu_read_unlock(); return; } if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) { rcu_read_unlock(); return; } /* */ event = PLINK_UNDEFINED; if (ftype != WLAN_SP_MESH_PEERING_CLOSE && (!mesh_matches_local(&elems, sdata))) { matches_local = false; switch (ftype) { case WLAN_SP_MESH_PEERING_OPEN: event = OPN_RJCT; break; case WLAN_SP_MESH_PEERING_CONFIRM: event = CNF_RJCT; break; default: break; } } if (!sta && !matches_local) { rcu_read_unlock(); reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); llid = 0; mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, mgmt->sa, llid, plid, reason); return; } else if (!sta) { /* */ u32 rates; rcu_read_unlock(); if (!mesh_plink_free_count(sdata)) { mpl_dbg("Mesh plink error: no more free plinks\n"); return; } rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); sta = mesh_plink_alloc(sdata, mgmt->sa, rates, &elems); if (!sta) { mpl_dbg("Mesh plink error: plink table full\n"); return; } if (sta_info_insert_rcu(sta)) { rcu_read_unlock(); return; } event = OPN_ACPT; spin_lock_bh(&sta->lock); } else if (matches_local) { spin_lock_bh(&sta->lock); switch (ftype) { case WLAN_SP_MESH_PEERING_OPEN: if (!mesh_plink_free_count(sdata) || (sta->plid && sta->plid != plid)) event = OPN_IGNR; else event = OPN_ACPT; break; case WLAN_SP_MESH_PEERING_CONFIRM: if (!mesh_plink_free_count(sdata) || (sta->llid != llid || sta->plid != plid)) event = CNF_IGNR; else event = CNF_ACPT; break; case WLAN_SP_MESH_PEERING_CLOSE: if (sta->plink_state == NL80211_PLINK_ESTAB) /* */ event = CLS_ACPT; else if (sta->plid != plid) event = CLS_IGNR; else if (ie_len == 7 && sta->llid != llid) event = CLS_IGNR; else event = CLS_ACPT; break; default: mpl_dbg("Mesh plink: unknown frame subtype\n"); spin_unlock_bh(&sta->lock); rcu_read_unlock(); return; } } else { spin_lock_bh(&sta->lock); } mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", mgmt->sa, mplstates[sta->plink_state], le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), event); reason = 0; switch (sta->plink_state) { /* */ case NL80211_PLINK_LISTEN: switch (event) { case CLS_ACPT: mesh_plink_fsm_restart(sta); spin_unlock_bh(&sta->lock); break; case OPN_ACPT: sta->plink_state = NL80211_PLINK_OPN_RCVD; sta->plid = plid; get_random_bytes(&llid, 2); sta->llid = llid; mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, sta->sta.addr, llid, 0, 0); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case NL80211_PLINK_OPN_SNT: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: /* */ sta->plink_state = NL80211_PLINK_OPN_RCVD; sta->plid = plid; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CONFIRM, sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: sta->plink_state = NL80211_PLINK_CNF_RCVD; if (!mod_plink_timer(sta, dot11MeshConfirmTimeout(sdata))) sta->ignore_plink_timer = true; spin_unlock_bh(&sta->lock); break; default: spin_unlock_bh(&sta->lock); break; } break; case NL80211_PLINK_OPN_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CONFIRM, sta->sta.addr, llid, plid, 0); break; case CNF_ACPT: del_timer(&sta->plink_timer); sta->plink_state = NL80211_PLINK_ESTAB; spin_unlock_bh(&sta->lock); mesh_plink_inc_estab_count(sdata); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mpl_dbg("Mesh plink with %pM ESTABLISHED\n", sta->sta.addr); break; default: spin_unlock_bh(&sta->lock); break; } break; case NL80211_PLINK_CNF_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); case CLS_ACPT: if (!reason) reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; sta->plink_state = NL80211_PLINK_HOLDING; if (!mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata))) sta->ignore_plink_timer = true; llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: del_timer(&sta->plink_timer); sta->plink_state = NL80211_PLINK_ESTAB; spin_unlock_bh(&sta->lock); mesh_plink_inc_estab_count(sdata); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mpl_dbg("Mesh plink with %pM ESTABLISHED\n", sta->sta.addr); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case NL80211_PLINK_ESTAB: switch (event) { case CLS_ACPT: reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); sta->reason = reason; deactivated = __mesh_plink_deactivate(sta); sta->plink_state = NL80211_PLINK_HOLDING; llid = sta->llid; mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); spin_unlock_bh(&sta->lock); if (deactivated) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, llid, plid, reason); break; case OPN_ACPT: llid = sta->llid; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CONFIRM, sta->sta.addr, llid, plid, 0); break; default: spin_unlock_bh(&sta->lock); break; } break; case NL80211_PLINK_HOLDING: switch (event) { case CLS_ACPT: if (del_timer(&sta->plink_timer)) sta->ignore_plink_timer = 1; mesh_plink_fsm_restart(sta); spin_unlock_bh(&sta->lock); break; case OPN_ACPT: case CNF_ACPT: case OPN_RJCT: case CNF_RJCT: llid = sta->llid; reason = sta->reason; spin_unlock_bh(&sta->lock); mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, sta->sta.addr, llid, plid, reason); break; default: spin_unlock_bh(&sta->lock); } break; default: /* */ spin_unlock_bh(&sta->lock); break; } rcu_read_unlock(); }
static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, const u8 *bssid, const int beacon_int, struct ieee80211_channel *chan, const u32 basic_rates, const u16 capability, u64 tsf) { struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; struct ieee80211_local *local = sdata->local; int rates, i; struct sk_buff *skb; struct ieee80211_mgmt *mgmt; u8 *pos; struct ieee80211_supported_band *sband; struct cfg80211_bss *bss; u32 bss_change; u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; enum nl80211_channel_type channel_type; lockdep_assert_held(&ifibss->mtx); /* Reset own TSF to allow time synchronization work. */ drv_reset_tsf(local, sdata); skb = ifibss->skb; RCU_INIT_POINTER(ifibss->presp, NULL); synchronize_rcu(); skb->data = skb->head; skb->len = 0; skb_reset_tail_pointer(skb); skb_reserve(skb, sdata->local->hw.extra_tx_headroom); if (memcmp(ifibss->bssid, bssid, ETH_ALEN)) sta_info_flush(sdata->local, sdata); /* if merging, indicate to driver that we leave the old IBSS */ if (sdata->vif.bss_conf.ibss_joined) { sdata->vif.bss_conf.ibss_joined = false; netif_carrier_off(sdata->dev); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); } memcpy(ifibss->bssid, bssid, ETH_ALEN); sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; channel_type = ifibss->channel_type; if (channel_type > NL80211_CHAN_HT20 && !cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type)) channel_type = NL80211_CHAN_HT20; if (!ieee80211_set_channel_type(local, sdata, channel_type)) { /* can only fail due to HT40+/- mismatch */ channel_type = NL80211_CHAN_HT20; WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_HT20)); } ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); sband = local->hw.wiphy->bands[chan->band]; /* build supported rates array */ pos = supp_rates; for (i = 0; i < sband->n_bitrates; i++) { int rate = sband->bitrates[i].bitrate; u8 basic = 0; if (basic_rates & BIT(i)) basic = 0x80; *pos++ = basic | (u8) (rate / 5); } /* Build IBSS probe response */ mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP); memset(mgmt->da, 0xff, ETH_ALEN); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); mgmt->u.beacon.timestamp = cpu_to_le64(tsf); mgmt->u.beacon.capab_info = cpu_to_le16(capability); pos = skb_put(skb, 2 + ifibss->ssid_len); *pos++ = WLAN_EID_SSID; *pos++ = ifibss->ssid_len; memcpy(pos, ifibss->ssid, ifibss->ssid_len); rates = sband->n_bitrates; if (rates > 8) rates = 8; pos = skb_put(skb, 2 + rates); *pos++ = WLAN_EID_SUPP_RATES; *pos++ = rates; memcpy(pos, supp_rates, rates); if (sband->band == IEEE80211_BAND_2GHZ) { pos = skb_put(skb, 2 + 1); *pos++ = WLAN_EID_DS_PARAMS; *pos++ = 1; *pos++ = ieee80211_frequency_to_channel(chan->center_freq); } pos = skb_put(skb, 2 + 2); *pos++ = WLAN_EID_IBSS_PARAMS; *pos++ = 2; /* FIX: set ATIM window based on scan results */ *pos++ = 0; *pos++ = 0; if (sband->n_bitrates > 8) { rates = sband->n_bitrates - 8; pos = skb_put(skb, 2 + rates); *pos++ = WLAN_EID_EXT_SUPP_RATES; *pos++ = rates; memcpy(pos, &supp_rates[8], rates); } if (ifibss->ie_len) memcpy(skb_put(skb, ifibss->ie_len), ifibss->ie, ifibss->ie_len); /* add HT capability and information IEs */ if (channel_type && sband->ht_cap.ht_supported) { pos = skb_put(skb, 4 + sizeof(struct ieee80211_ht_cap) + sizeof(struct ieee80211_ht_info)); pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, sband->ht_cap.cap); pos = ieee80211_ie_build_ht_info(pos, &sband->ht_cap, chan, channel_type); } if (local->hw.queues >= 4) { pos = skb_put(skb, 9); *pos++ = WLAN_EID_VENDOR_SPECIFIC; *pos++ = 7; /* len */ *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ *pos++ = 0x50; *pos++ = 0xf2; *pos++ = 2; /* WME */ *pos++ = 0; /* WME info */ *pos++ = 1; /* WME ver */ *pos++ = 0; /* U-APSD no in use */ } RCU_INIT_POINTER(ifibss->presp, skb); sdata->vif.bss_conf.beacon_int = beacon_int; sdata->vif.bss_conf.basic_rates = basic_rates; bss_change = BSS_CHANGED_BEACON_INT; bss_change |= ieee80211_reset_erp_info(sdata); bss_change |= BSS_CHANGED_BSSID; bss_change |= BSS_CHANGED_BEACON; bss_change |= BSS_CHANGED_BEACON_ENABLED; bss_change |= BSS_CHANGED_BASIC_RATES; bss_change |= BSS_CHANGED_HT; bss_change |= BSS_CHANGED_IBSS; sdata->vif.bss_conf.ibss_joined = true; ieee80211_bss_info_change_notify(sdata, bss_change); ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); ifibss->state = IEEE80211_IBSS_MLME_JOINED; mod_timer(&ifibss->timer, round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); bss = cfg80211_inform_bss_frame(local->hw.wiphy, local->hw.conf.channel, mgmt, skb->len, 0, GFP_KERNEL); cfg80211_put_bss(bss); netif_carrier_on(sdata->dev); cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); }