/* * WPA Supplicant - Basic mesh peer management * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved. * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #include "utils/common.h" #include "utils/eloop.h" #include "common/ieee802_11_defs.h" #include "common/hw_features_common.h" #include "common/ocv.h" #include "ap/hostapd.h" #include "ap/sta_info.h" #include "ap/ieee802_11.h" #include "ap/wpa_auth.h" #include "wpa_supplicant_i.h" #include "driver_i.h" #include "mesh_mpm.h" #include "mesh_rsn.h" #include "notify.h" struct mesh_peer_mgmt_ie { const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */ const u8 *llid; /* Local Link ID (2 octets) */ const u8 *plid; /* Peer Link ID (conditional, 2 octets) */ const u8 *reason; /* Reason Code (conditional, 2 octets) */ const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */ }; static void plink_timer(void *eloop_ctx, void *user_data); enum plink_event { PLINK_UNDEFINED, OPN_ACPT, OPN_RJCT, CNF_ACPT, CNF_RJCT, CLS_ACPT, REQ_RJCT }; static const char * const mplstate[] = { [0] = "UNINITIALIZED", [PLINK_IDLE] = "IDLE", [PLINK_OPN_SNT] = "OPN_SNT", [PLINK_OPN_RCVD] = "OPN_RCVD", [PLINK_CNF_RCVD] = "CNF_RCVD", [PLINK_ESTAB] = "ESTAB", [PLINK_HOLDING] = "HOLDING", [PLINK_BLOCKED] = "BLOCKED" }; static const char * const mplevent[] = { [PLINK_UNDEFINED] = "UNDEFINED", [OPN_ACPT] = "OPN_ACPT", [OPN_RJCT] = "OPN_RJCT", [CNF_ACPT] = "CNF_ACPT", [CNF_RJCT] = "CNF_RJCT", [CLS_ACPT] = "CLS_ACPT", [REQ_RJCT] = "REQ_RJCT", }; static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s, u8 action_field, const u8 *ie, size_t len, struct mesh_peer_mgmt_ie *mpm_ie) { os_memset(mpm_ie, 0, sizeof(*mpm_ie)); /* Remove optional Chosen PMK field at end */ if (len >= SAE_PMKID_LEN) { mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN; len -= SAE_PMKID_LEN; } if ((action_field == PLINK_OPEN && len != 4) || (action_field == PLINK_CONFIRM && len != 6) || (action_field == PLINK_CLOSE && len != 6 && len != 8)) { wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie"); return -1; } /* required fields */ if (len < 4) return -1; mpm_ie->proto_id = ie; mpm_ie->llid = ie + 2; ie += 4; len -= 4; /* close reason is always present at end for close */ if (action_field == PLINK_CLOSE) { if (len < 2) return -1; mpm_ie->reason = ie + len - 2; len -= 2; } /* Peer Link ID, present for confirm, and possibly close */ if (len >= 2) mpm_ie->plid = ie; return 0; } static int plink_free_count(struct hostapd_data *hapd) { if (hapd->max_plinks > hapd->num_plinks) return hapd->max_plinks - hapd->num_plinks; return 0; } static u16 copy_supp_rates(struct wpa_supplicant *wpa_s, struct sta_info *sta, struct ieee802_11_elems *elems) { if (!elems->supp_rates) { wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR, MAC2STR(sta->addr)); return WLAN_STATUS_UNSPECIFIED_FAILURE; } if (elems->supp_rates_len + elems->ext_supp_rates_len > sizeof(sta->supported_rates)) { wpa_msg(wpa_s, MSG_ERROR, "Invalid supported rates element length " MACSTR " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len, elems->ext_supp_rates_len); return WLAN_STATUS_UNSPECIFIED_FAILURE; } sta->supported_rates_len = merge_byte_arrays( sta->supported_rates, sizeof(sta->supported_rates), elems->supp_rates, elems->supp_rates_len, elems->ext_supp_rates, elems->ext_supp_rates_len); return WLAN_STATUS_SUCCESS; } /* return true if elems from a neighbor match this MBSS */ static bool matches_local(struct wpa_supplicant *wpa_s, struct ieee802_11_elems *elems) { struct mesh_conf *mconf = wpa_s->ifmsh->mconf; if (elems->mesh_config_len < 5) return false; return (mconf->meshid_len == elems->mesh_id_len && os_memcmp(mconf->meshid, elems->mesh_id, elems->mesh_id_len) == 0 && mconf->mesh_pp_id == elems->mesh_config[0] && mconf->mesh_pm_id == elems->mesh_config[1] && mconf->mesh_cc_id == elems->mesh_config[2] && mconf->mesh_sp_id == elems->mesh_config[3] && mconf->mesh_auth_id == elems->mesh_config[4]); } /* check if local link id is already used with another peer */ static bool llid_in_use(struct wpa_supplicant *wpa_s, u16 llid) { struct sta_info *sta; struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; for (sta = hapd->sta_list; sta; sta = sta->next) { if (sta->my_lid == llid) return true; } return false; } /* generate an llid for a link and set to initial state */ static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s, struct sta_info *sta) { u16 llid; do { if (os_get_random((u8 *) &llid, sizeof(llid)) < 0) llid = 0; /* continue */ } while (!llid || llid_in_use(wpa_s, llid)); sta->my_lid = llid; sta->peer_lid = 0; sta->peer_aid = 0; /* * We do not use wpa_mesh_set_plink_state() here because there is no * entry in kernel yet. */ sta->plink_state = PLINK_IDLE; } static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s, struct sta_info *sta, enum plink_action_field type, u16 close_reason) { struct wpabuf *buf; struct hostapd_iface *ifmsh = wpa_s->ifmsh; struct hostapd_data *bss = ifmsh->bss[0]; struct mesh_conf *conf = ifmsh->mconf; u8 supp_rates[2 + 2 + 32]; u8 *pos, *cat; u8 ie_len, add_plid = 0; int ret; int ampe = conf->security & MESH_CONF_SEC_AMPE; size_t buf_len; if (!sta) return; buf_len = 2 + /* Category and Action */ 2 + /* capability info */ 2 + /* AID */ 2 + 8 + /* supported rates */ 2 + (32 - 8) + 2 + 32 + /* mesh ID */ 2 + 7 + /* mesh config */ 2 + 24 + /* peering management */ 2 + 96 + 32 + 32 + /* AMPE (96 + max GTKlen + max IGTKlen) */ 2 + 16; /* MIC */ if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { buf_len += 2 + 26 + /* HT capabilities */ 2 + 22; /* HT operation */ } #ifdef CONFIG_IEEE80211AC if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { buf_len += 2 + 12 + /* VHT Capabilities */ 2 + 5; /* VHT Operation */ } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) { buf_len += 3 + HE_MAX_MAC_CAPAB_SIZE + HE_MAX_PHY_CAPAB_SIZE + HE_MAX_MCS_CAPAB_SIZE + HE_MAX_PPET_CAPAB_SIZE; buf_len += 3 + sizeof(struct ieee80211_he_operation); if (is_6ghz_op_class(bss->iconf->op_class)) buf_len += sizeof(struct ieee80211_he_6ghz_oper_info) + 3 + sizeof(struct ieee80211_he_6ghz_band_cap); } #endif /* CONFIG_IEEE80211AX */ if (type != PLINK_CLOSE) buf_len += conf->rsn_ie_len; /* RSN IE */ #ifdef CONFIG_OCV /* OCI is included even when the other STA doesn't support OCV */ if (type != PLINK_CLOSE && conf->ocv) buf_len += OCV_OCI_EXTENDED_LEN; #endif /* CONFIG_OCV */ #ifdef CONFIG_IEEE80211BE if (type != PLINK_CLOSE && wpa_s->mesh_eht_enabled) { buf_len += 3 + 2 + EHT_PHY_CAPAB_LEN + EHT_MCS_NSS_CAPAB_LEN + EHT_PPE_THRESH_CAPAB_LEN; buf_len += 3 + sizeof(struct ieee80211_eht_operation); } #endif /* CONFIG_IEEE80211BE */ buf = wpabuf_alloc(buf_len); if (!buf) return; cat = wpabuf_mhead_u8(buf); wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); wpabuf_put_u8(buf, type); if (type != PLINK_CLOSE) { u8 info; /* capability info */ wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); /* aid */ if (type == PLINK_CONFIRM) wpabuf_put_le16(buf, sta->aid); /* IE: supp + ext. supp rates */ pos = hostapd_eid_supp_rates(bss, supp_rates); pos = hostapd_eid_ext_supp_rates(bss, pos); wpabuf_put_data(buf, supp_rates, pos - supp_rates); /* IE: RSN IE */ wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); /* IE: Mesh ID */ wpabuf_put_u8(buf, WLAN_EID_MESH_ID); wpabuf_put_u8(buf, conf->meshid_len); wpabuf_put_data(buf, conf->meshid, conf->meshid_len); /* IE: mesh conf */ wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); wpabuf_put_u8(buf, 7); wpabuf_put_u8(buf, conf->mesh_pp_id); wpabuf_put_u8(buf, conf->mesh_pm_id); wpabuf_put_u8(buf, conf->mesh_cc_id); wpabuf_put_u8(buf, conf->mesh_sp_id); wpabuf_put_u8(buf, conf->mesh_auth_id); info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; /* TODO: Add Connected to Mesh Gate/AS subfields */ wpabuf_put_u8(buf, info); /* Set forwarding based on configuration and always accept * plinks for now */ wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | (conf->mesh_fwding ? MESH_CAP_FORWARDING : 0)); } else { /* Peer closing frame */ /* IE: Mesh ID */ wpabuf_put_u8(buf, WLAN_EID_MESH_ID); wpabuf_put_u8(buf, conf->meshid_len); wpabuf_put_data(buf, conf->meshid, conf->meshid_len); } /* IE: Mesh Peering Management element */ ie_len = 4; if (ampe) ie_len += PMKID_LEN; switch (type) { case PLINK_OPEN: break; case PLINK_CONFIRM: ie_len += 2; add_plid = 1; break; case PLINK_CLOSE: ie_len += 2; add_plid = 1; ie_len += 2; /* reason code */ break; } wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); wpabuf_put_u8(buf, ie_len); /* peering protocol */ if (ampe) wpabuf_put_le16(buf, 1); else wpabuf_put_le16(buf, 0); wpabuf_put_le16(buf, sta->my_lid); if (add_plid) wpabuf_put_le16(buf, sta->peer_lid); if (type == PLINK_CLOSE) wpabuf_put_le16(buf, close_reason); if (ampe) { if (sta->sae == NULL) { wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); goto fail; } mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, wpabuf_put(buf, PMKID_LEN)); } if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { u8 ht_capa_oper[2 + 26 + 2 + 22]; pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); pos = hostapd_eid_ht_operation(bss, pos); wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); } #ifdef CONFIG_IEEE80211AC if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { u8 vht_capa_oper[2 + 12 + 2 + 5]; pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); pos = hostapd_eid_vht_operation(bss, pos); wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); } #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) { u8 he_capa_oper[3 + HE_MAX_MAC_CAPAB_SIZE + HE_MAX_PHY_CAPAB_SIZE + HE_MAX_MCS_CAPAB_SIZE + HE_MAX_PPET_CAPAB_SIZE + 3 + sizeof(struct ieee80211_he_operation) + sizeof(struct ieee80211_he_6ghz_oper_info) + 3 + sizeof(struct ieee80211_he_6ghz_band_cap)]; pos = hostapd_eid_he_capab(bss, he_capa_oper, IEEE80211_MODE_MESH); pos = hostapd_eid_he_operation(bss, pos); pos = hostapd_eid_he_6ghz_band_cap(bss, pos); wpabuf_put_data(buf, he_capa_oper, pos - he_capa_oper); } #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_OCV if (type != PLINK_CLOSE && conf->ocv) { struct wpa_channel_info ci; if (wpa_drv_channel_info(wpa_s, &ci) != 0) { wpa_printf(MSG_WARNING, "Mesh MPM: Failed to get channel info for OCI element"); goto fail; } pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); if (ocv_insert_extended_oci(&ci, pos) < 0) goto fail; } #endif /* CONFIG_OCV */ #ifdef CONFIG_IEEE80211BE if (type != PLINK_CLOSE && wpa_s->mesh_eht_enabled) { u8 eht_capa_oper[3 + 2 + EHT_PHY_CAPAB_LEN + EHT_MCS_NSS_CAPAB_LEN + EHT_PPE_THRESH_CAPAB_LEN + 3 + sizeof(struct ieee80211_eht_operation)]; pos = hostapd_eid_eht_capab(bss, eht_capa_oper, IEEE80211_MODE_MESH); pos = hostapd_eid_eht_operation(bss, pos); wpabuf_put_data(buf, eht_capa_oper, pos - eht_capa_oper); } #endif /* CONFIG_IEEE80211BE */ if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: failed to add AMPE and MIC IE"); goto fail; } wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " MACSTR " (my_lid=0x%x peer_lid=0x%x)", type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, sta->addr, wpa_s->own_addr, wpa_s->own_addr, wpabuf_head(buf), wpabuf_len(buf), 0); if (ret < 0) wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: failed to send peering frame"); fail: wpabuf_free(buf); } /* configure peering state in ours and driver's station entry */ void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, struct sta_info *sta, enum mesh_plink_state state) { struct hostapd_sta_add_params params; int ret; wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", MAC2STR(sta->addr), mplstate[sta->plink_state], mplstate[state]); sta->plink_state = state; os_memset(¶ms, 0, sizeof(params)); params.addr = sta->addr; params.plink_state = state; params.peer_aid = sta->peer_aid; params.set = 1; ret = wpa_drv_sta_add(wpa_s, ¶ms); if (ret) { wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR ": %d", MAC2STR(sta->addr), ret); } } static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, struct sta_info *sta) { struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; eloop_cancel_timeout(plink_timer, wpa_s, sta); ap_free_sta(hapd, sta); } static void plink_timer(void *eloop_ctx, void *user_data) { struct wpa_supplicant *wpa_s = eloop_ctx; struct sta_info *sta = user_data; u16 reason = 0; struct mesh_conf *conf = wpa_s->ifmsh->mconf; struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; switch (sta->plink_state) { case PLINK_OPN_RCVD: case PLINK_OPN_SNT: /* retry timer */ if (sta->mpm_retries < conf->dot11MeshMaxRetries) { eloop_register_timeout( conf->dot11MeshRetryTimeout / 1000, (conf->dot11MeshRetryTimeout % 1000) * 1000, plink_timer, wpa_s, sta); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); sta->mpm_retries++; break; } reason = WLAN_REASON_MESH_MAX_RETRIES; /* fall through */ case PLINK_CNF_RCVD: /* confirm timer */ if (!reason) reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, (conf->dot11MeshHoldingTimeout % 1000) * 1000, plink_timer, wpa_s, sta); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; case PLINK_HOLDING: /* holding timer */ if (sta->mesh_sae_pmksa_caching) { wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", MAC2STR(sta->addr)); wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); } mesh_mpm_fsm_restart(wpa_s, sta); break; default: break; } } /* initiate peering with station */ static void mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, enum mesh_plink_state next_state) { struct mesh_conf *conf = wpa_s->ifmsh->mconf; eloop_cancel_timeout(plink_timer, wpa_s, sta); eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, (conf->dot11MeshRetryTimeout % 1000) * 1000, plink_timer, wpa_s, sta); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); wpa_mesh_set_plink_state(wpa_s, sta, next_state); } static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, void *ctx) { struct wpa_supplicant *wpa_s = ctx; int reason = WLAN_REASON_MESH_PEERING_CANCELLED; if (sta) { if (sta->plink_state == PLINK_ESTAB) hapd->num_plinks--; wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, MAC2STR(sta->addr)); eloop_cancel_timeout(plink_timer, wpa_s, sta); eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta); return 0; } return 1; } int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) { struct hostapd_data *hapd; struct sta_info *sta; if (!wpa_s->ifmsh) { wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); return -1; } hapd = wpa_s->ifmsh->bss[0]; sta = ap_get_sta(hapd, addr); if (!sta) { wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); return -1; } return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; } static void peer_add_timer(void *eloop_ctx, void *user_data) { struct wpa_supplicant *wpa_s = eloop_ctx; struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); } int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, int duration) { struct wpa_ssid *ssid = wpa_s->current_ssid; struct hostapd_data *hapd; struct sta_info *sta; struct mesh_conf *conf; if (!wpa_s->ifmsh) { wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); return -1; } if (!ssid || !ssid->no_auto_peer) { wpa_msg(wpa_s, MSG_INFO, "This command is available only with no_auto_peer mesh network"); return -1; } hapd = wpa_s->ifmsh->bss[0]; conf = wpa_s->ifmsh->mconf; sta = ap_get_sta(hapd, addr); if (!sta) { wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); return -1; } if ((PLINK_OPN_SNT <= sta->plink_state && sta->plink_state <= PLINK_ESTAB) || (sta->sae && sta->sae->state > SAE_NOTHING)) { wpa_msg(wpa_s, MSG_INFO, "Specified peer is connecting/connected"); return -1; } if (conf->security == MESH_CONF_SEC_NONE) { mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); } else { mesh_rsn_auth_sae_sta(wpa_s, sta); os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); eloop_register_timeout(duration == -1 ? 10 : duration, 0, peer_add_timer, wpa_s, NULL); } return 0; } void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) { struct hostapd_data *hapd = ifmsh->bss[0]; /* notify peers we're leaving */ ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); hapd->num_plinks = 0; hostapd_free_stas(hapd); eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); } /* for mesh_rsn to indicate this peer has completed authentication, and we're * ready to start AMPE */ void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) { struct hostapd_data *data = wpa_s->ifmsh->bss[0]; struct hostapd_sta_add_params params; struct sta_info *sta; int ret; sta = ap_get_sta(data, addr); if (!sta) { wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); return; } /* TODO: Should do nothing if this STA is already authenticated, but * the AP code already sets this flag. */ sta->flags |= WLAN_STA_AUTH; mesh_rsn_init_ampe_sta(wpa_s, sta); os_memset(¶ms, 0, sizeof(params)); params.addr = sta->addr; params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; params.set = 1; wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, MAC2STR(sta->addr)); ret = wpa_drv_sta_add(wpa_s, ¶ms); if (ret) { wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR ": %d", MAC2STR(sta->addr), ret); } if (!sta->my_lid) mesh_mpm_init_link(wpa_s, sta); mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); } /* * Initialize a sta_info structure for a peer and upload it into the driver * in preparation for beginning authentication or peering. This is done when a * Beacon (secure or open mesh) or a peering open frame (for open mesh) is * received from the peer for the first time. */ static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, const u8 *addr, struct ieee802_11_elems *elems) { struct hostapd_sta_add_params params; struct mesh_conf *conf = wpa_s->ifmsh->mconf; struct hostapd_data *data = wpa_s->ifmsh->bss[0]; struct sta_info *sta; struct ieee80211_ht_operation *oper; int ret; if (elems->mesh_config_len >= 7 && !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { wpa_msg(wpa_s, MSG_DEBUG, "mesh: Ignore a crowded peer " MACSTR, MAC2STR(addr)); return NULL; } sta = ap_get_sta(data, addr); if (sta) return NULL; sta = ap_sta_add(data, addr); if (!sta) return NULL; /* Set WMM by default since Mesh STAs are QoS STAs */ sta->flags |= WLAN_STA_WMM; /* initialize sta */ if (copy_supp_rates(wpa_s, sta, elems)) { ap_free_sta(data, sta); return NULL; } if (!sta->my_lid) mesh_mpm_init_link(wpa_s, sta); copy_sta_ht_capab(data, sta, elems->ht_capabilities); oper = (struct ieee80211_ht_operation *) elems->ht_operation; if (oper && !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && sta->ht_capabilities) { wpa_msg(wpa_s, MSG_DEBUG, MACSTR " does not support 40 MHz bandwidth", MAC2STR(sta->addr)); set_disable_ht40(sta->ht_capabilities, 1); } update_ht_state(data, sta); #ifdef CONFIG_IEEE80211AC copy_sta_vht_capab(data, sta, elems->vht_capabilities); copy_sta_vht_oper(data, sta, elems->vht_operation); set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); #endif /* CONFIG_IEEE80211AC */ #ifdef CONFIG_IEEE80211AX copy_sta_he_capab(data, sta, IEEE80211_MODE_MESH, elems->he_capabilities, elems->he_capabilities_len); copy_sta_he_6ghz_capab(data, sta, elems->he_6ghz_band_cap); #endif /* CONFIG_IEEE80211AX */ #ifdef CONFIG_IEEE80211BE copy_sta_eht_capab(data, sta, IEEE80211_MODE_MESH, elems->he_capabilities, elems->he_capabilities_len, elems->eht_capabilities, elems->eht_capabilities_len); #endif /*CONFIG_IEEE80211BE */ if (hostapd_get_aid(data, sta) < 0) { wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); ap_free_sta(data, sta); return NULL; } /* insert into driver */ os_memset(¶ms, 0, sizeof(params)); params.supp_rates = sta->supported_rates; params.supp_rates_len = sta->supported_rates_len; params.addr = addr; params.plink_state = sta->plink_state; params.aid = sta->aid; params.peer_aid = sta->peer_aid; params.listen_interval = 100; params.ht_capabilities = sta->ht_capabilities; params.vht_capabilities = sta->vht_capabilities; params.he_capab = sta->he_capab; params.he_capab_len = sta->he_capab_len; params.he_6ghz_capab = sta->he_6ghz_capab; params.eht_capab = sta->eht_capab; params.eht_capab_len = sta->eht_capab_len; params.flags |= WPA_STA_WMM; params.flags_mask |= WPA_STA_AUTHENTICATED; if (conf->security == MESH_CONF_SEC_NONE) { params.flags |= WPA_STA_AUTHORIZED; params.flags |= WPA_STA_AUTHENTICATED; } else { sta->flags |= WLAN_STA_MFP; params.flags |= WPA_STA_MFP; } ret = wpa_drv_sta_add(wpa_s, ¶ms); if (ret) { wpa_msg(wpa_s, MSG_ERROR, "Driver failed to insert " MACSTR ": %d", MAC2STR(addr), ret); ap_free_sta(data, sta); return NULL; } return sta; } void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, struct ieee802_11_elems *elems) { struct mesh_conf *conf = wpa_s->ifmsh->mconf; struct hostapd_data *data = wpa_s->ifmsh->bss[0]; struct sta_info *sta; struct wpa_ssid *ssid = wpa_s->current_ssid; sta = mesh_mpm_add_peer(wpa_s, addr, elems); if (!sta) return; if (ssid && ssid->no_auto_peer && (is_zero_ether_addr(data->mesh_required_peer) || os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " MACSTR " because of no_auto_peer", MAC2STR(addr)); if (data->mesh_pending_auth) { struct os_reltime age; const struct ieee80211_mgmt *mgmt; struct hostapd_frame_info fi; mgmt = wpabuf_head(data->mesh_pending_auth); os_reltime_age(&data->mesh_pending_auth_time, &age); if (age.sec < 2 && os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "mesh: Process pending Authentication frame from %u.%06u seconds ago", (unsigned int) age.sec, (unsigned int) age.usec); os_memset(&fi, 0, sizeof(fi)); ieee802_11_mgmt( data, wpabuf_head(data->mesh_pending_auth), wpabuf_len(data->mesh_pending_auth), &fi); } wpabuf_free(data->mesh_pending_auth); data->mesh_pending_auth = NULL; } return; } if (conf->security == MESH_CONF_SEC_NONE) { if (sta->plink_state < PLINK_OPN_SNT || sta->plink_state > PLINK_ESTAB) mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); } else { mesh_rsn_auth_sae_sta(wpa_s, sta); } } void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) { struct hostapd_frame_info fi; os_memset(&fi, 0, sizeof(fi)); fi.datarate = rx_mgmt->datarate; fi.ssi_signal = rx_mgmt->ssi_signal; ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, rx_mgmt->frame_len, &fi); } static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, struct sta_info *sta) { struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; struct mesh_conf *conf = wpa_s->ifmsh->mconf; u8 seq[6] = {}; wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", MAC2STR(sta->addr)); if (conf->security & MESH_CONF_SEC_AMPE) { wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); wpa_drv_set_key(wpa_s, -1, wpa_cipher_to_alg(conf->pairwise_cipher), sta->addr, 0, 0, seq, sizeof(seq), sta->mtk, sta->mtk_len, KEY_FLAG_PAIRWISE_RX_TX); wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", sta->mgtk, sta->mgtk_len); wpa_drv_set_key(wpa_s, -1, wpa_cipher_to_alg(conf->group_cipher), sta->addr, sta->mgtk_key_id, 0, sta->mgtk_rsc, sizeof(sta->mgtk_rsc), sta->mgtk, sta->mgtk_len, KEY_FLAG_GROUP_RX); if (sta->igtk_len) { wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", sta->igtk_rsc, sizeof(sta->igtk_rsc)); wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", sta->igtk, sta->igtk_len); wpa_drv_set_key( wpa_s, -1, wpa_cipher_to_alg(conf->mgmt_group_cipher), sta->addr, sta->igtk_key_id, 0, sta->igtk_rsc, sizeof(sta->igtk_rsc), sta->igtk, sta->igtk_len, KEY_FLAG_GROUP_RX); } } wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); hapd->num_plinks++; sta->flags |= WLAN_STA_ASSOC; sta->mesh_sae_pmksa_caching = 0; eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); peer_add_timer(wpa_s, NULL); eloop_cancel_timeout(plink_timer, wpa_s, sta); /* Send ctrl event */ wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, MAC2STR(sta->addr)); /* Send D-Bus event */ wpas_notify_mesh_peer_connected(wpa_s, sta->addr); } static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, enum plink_event event, u16 reason) { struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; struct mesh_conf *conf = wpa_s->ifmsh->mconf; wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", MAC2STR(sta->addr), mplstate[sta->plink_state], mplevent[event]); switch (sta->plink_state) { case PLINK_IDLE: switch (event) { case CLS_ACPT: mesh_mpm_fsm_restart(wpa_s, sta); break; case OPN_ACPT: mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 0); break; case REQ_RJCT: mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; default: break; } break; case PLINK_OPN_SNT: switch (event) { case OPN_RJCT: case CNF_RJCT: if (!reason) reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; /* fall-through */ case CLS_ACPT: wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); if (!reason) reason = WLAN_REASON_MESH_CLOSE_RCVD; eloop_register_timeout( conf->dot11MeshHoldingTimeout / 1000, (conf->dot11MeshHoldingTimeout % 1000) * 1000, plink_timer, wpa_s, sta); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; case OPN_ACPT: /* retry timer is left untouched */ wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 0); break; case CNF_ACPT: wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); eloop_cancel_timeout(plink_timer, wpa_s, sta); eloop_register_timeout( conf->dot11MeshConfirmTimeout / 1000, (conf->dot11MeshConfirmTimeout % 1000) * 1000, plink_timer, wpa_s, sta); break; default: break; } break; case PLINK_OPN_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: if (!reason) reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; /* fall-through */ case CLS_ACPT: wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); if (!reason) reason = WLAN_REASON_MESH_CLOSE_RCVD; eloop_register_timeout( conf->dot11MeshHoldingTimeout / 1000, (conf->dot11MeshHoldingTimeout % 1000) * 1000, plink_timer, wpa_s, sta); sta->mpm_close_reason = reason; mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; case OPN_ACPT: mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 0); break; case CNF_ACPT: if (conf->security & MESH_CONF_SEC_AMPE) mesh_rsn_derive_mtk(wpa_s, sta); mesh_mpm_plink_estab(wpa_s, sta); break; default: break; } break; case PLINK_CNF_RCVD: switch (event) { case OPN_RJCT: case CNF_RJCT: if (!reason) reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; /* fall-through */ case CLS_ACPT: wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); if (!reason) reason = WLAN_REASON_MESH_CLOSE_RCVD; eloop_register_timeout( conf->dot11MeshHoldingTimeout / 1000, (conf->dot11MeshHoldingTimeout % 1000) * 1000, plink_timer, wpa_s, sta); sta->mpm_close_reason = reason; mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; case OPN_ACPT: if (conf->security & MESH_CONF_SEC_AMPE) mesh_rsn_derive_mtk(wpa_s, sta); mesh_mpm_plink_estab(wpa_s, sta); mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 0); break; default: break; } break; case PLINK_ESTAB: switch (event) { case OPN_RJCT: case CNF_RJCT: case CLS_ACPT: wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); if (!reason) reason = WLAN_REASON_MESH_CLOSE_RCVD; eloop_register_timeout( conf->dot11MeshHoldingTimeout / 1000, (conf->dot11MeshHoldingTimeout % 1000) * 1000, plink_timer, wpa_s, sta); sta->mpm_close_reason = reason; wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " closed with reason %d", MAC2STR(sta->addr), reason); wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, MAC2STR(sta->addr)); /* Send D-Bus event */ wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr, reason); hapd->num_plinks--; mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; case OPN_ACPT: mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 0); break; default: break; } break; case PLINK_HOLDING: switch (event) { case CLS_ACPT: mesh_mpm_fsm_restart(wpa_s, sta); break; case OPN_ACPT: case CNF_ACPT: case OPN_RJCT: case CNF_RJCT: reason = sta->mpm_close_reason; mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); break; default: break; } break; default: wpa_msg(wpa_s, MSG_DEBUG, "Unsupported MPM event %s for state %s", mplevent[event], mplstate[sta->plink_state]); break; } } void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, const struct ieee80211_mgmt *mgmt, size_t len) { u8 action_field; struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; struct mesh_conf *mconf = wpa_s->ifmsh->mconf; struct sta_info *sta; u16 plid = 0, llid = 0, aid = 0; enum plink_event event; struct ieee802_11_elems elems; struct mesh_peer_mgmt_ie peer_mgmt_ie; const u8 *ies; size_t ie_len; int ret; u16 reason = 0; if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) return; action_field = mgmt->u.action.u.slf_prot_action.action; if (action_field != PLINK_OPEN && action_field != PLINK_CONFIRM && action_field != PLINK_CLOSE) return; ies = mgmt->u.action.u.slf_prot_action.variable; ie_len = (const u8 *) mgmt + len - mgmt->u.action.u.slf_prot_action.variable; /* at least expect mesh id and peering mgmt */ if (ie_len < 2 + 2) { wpa_printf(MSG_DEBUG, "MPM: Ignore too short action frame %u ie_len %u", action_field, (unsigned int) ie_len); return; } wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", WPA_GET_LE16(ies)); ies += 2; /* capability */ ie_len -= 2; } if (action_field == PLINK_CONFIRM) { aid = WPA_GET_LE16(ies); wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); ies += 2; /* aid */ ie_len -= 2; } /* check for mesh peering, mesh id and mesh config IEs */ if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); return; } if (!elems.peer_mgmt) { wpa_printf(MSG_DEBUG, "MPM: No Mesh Peering Management element"); return; } if (action_field != PLINK_CLOSE) { if (!elems.mesh_id || !elems.mesh_config) { wpa_printf(MSG_DEBUG, "MPM: No Mesh ID or Mesh Configuration element"); return; } if (!matches_local(wpa_s, &elems)) { wpa_printf(MSG_DEBUG, "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); return; } } ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, elems.peer_mgmt, elems.peer_mgmt_len, &peer_mgmt_ie); if (ret) { wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); return; } /* the sender's llid is our plid and vice-versa */ plid = WPA_GET_LE16(peer_mgmt_ie.llid); if (peer_mgmt_ie.plid) llid = WPA_GET_LE16(peer_mgmt_ie.plid); wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); if (action_field == PLINK_CLOSE) wpa_printf(MSG_DEBUG, "MPM: close reason=%u", WPA_GET_LE16(peer_mgmt_ie.reason)); sta = ap_get_sta(hapd, mgmt->sa); /* * If this is an open frame from an unknown STA, and this is an * open mesh, then go ahead and add the peer before proceeding. */ if (!sta && action_field == PLINK_OPEN && (!(mconf->security & MESH_CONF_SEC_AMPE) || wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); if (!sta) { wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); return; } #ifdef CONFIG_SAE /* peer is in sae_accepted? */ if (sta->sae && sta->sae->state != SAE_ACCEPTED) { wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); return; } #endif /* CONFIG_SAE */ if (!sta->my_lid) mesh_mpm_init_link(wpa_s, sta); if (mconf->security & MESH_CONF_SEC_AMPE) { int res; res = mesh_rsn_process_ampe(wpa_s, sta, &elems, &mgmt->u.action.category, peer_mgmt_ie.chosen_pmk, ies, ie_len); if (res) { wpa_printf(MSG_DEBUG, "MPM: RSN process rejected frame (res=%d)", res); if (action_field == PLINK_OPEN && res == -2) { /* AES-SIV decryption failed */ mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, WLAN_REASON_MESH_INVALID_GTK); } return; } #ifdef CONFIG_OCV if (action_field == PLINK_OPEN && elems.rsn_ie) { struct wpa_state_machine *sm = sta->wpa_sm; struct wpa_ie_data data; res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2, &data); if (res) { wpa_printf(MSG_DEBUG, "Failed to parse RSN IE (res=%d)", res); wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie, elems.rsn_ie_len); return; } wpa_auth_set_ocv(sm, mconf->ocv && (data.capabilities & WPA_CAPABILITY_OCVC)); } if (action_field != PLINK_CLOSE && wpa_auth_uses_ocv(sta->wpa_sm)) { struct wpa_channel_info ci; int tx_chanwidth; int tx_seg1_idx; if (wpa_drv_channel_info(wpa_s, &ci) != 0) { wpa_printf(MSG_WARNING, "MPM: Failed to get channel info to validate received OCI in MPM Confirm"); return; } if (get_tx_parameters( sta, channel_width_to_int(ci.chanwidth), ci.seg1_idx, &tx_chanwidth, &tx_seg1_idx) < 0) return; if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, tx_chanwidth, tx_seg1_idx) != OCI_SUCCESS) { wpa_printf(MSG_WARNING, "MPM: OCV failed: %s", ocv_errorstr); return; } } #endif /* CONFIG_OCV */ } if (sta->plink_state == PLINK_BLOCKED) { wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); return; } /* Now we will figure out the appropriate event... */ switch (action_field) { case PLINK_OPEN: if (plink_free_count(hapd) == 0) { event = REQ_RJCT; reason = WLAN_REASON_MESH_MAX_PEERS; wpa_printf(MSG_INFO, "MPM: Peer link num over quota(%d)", hapd->max_plinks); } else if (sta->peer_lid && sta->peer_lid != plid) { wpa_printf(MSG_DEBUG, "MPM: peer_lid mismatch: 0x%x != 0x%x", sta->peer_lid, plid); return; /* no FSM event */ } else { sta->peer_lid = plid; event = OPN_ACPT; } break; case PLINK_CONFIRM: if (plink_free_count(hapd) == 0) { event = REQ_RJCT; reason = WLAN_REASON_MESH_MAX_PEERS; wpa_printf(MSG_INFO, "MPM: Peer link num over quota(%d)", hapd->max_plinks); } else if (sta->my_lid != llid || (sta->peer_lid && sta->peer_lid != plid)) { wpa_printf(MSG_DEBUG, "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", sta->my_lid, llid, sta->peer_lid, plid); return; /* no FSM event */ } else { if (!sta->peer_lid) sta->peer_lid = plid; sta->peer_aid = aid; 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 cand 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 being * restarted. */ event = CLS_ACPT; else if (sta->peer_lid != plid) { wpa_printf(MSG_DEBUG, "MPM: peer_lid mismatch: 0x%x != 0x%x", sta->peer_lid, plid); return; /* no FSM event */ } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { wpa_printf(MSG_DEBUG, "MPM: my_lid mismatch: 0x%x != 0x%x", sta->my_lid, llid); return; /* no FSM event */ } else { event = CLS_ACPT; } break; default: /* * This cannot be hit due to the action_field check above, but * compilers may not be able to figure that out and can warn * about uninitialized event below. */ return; } mesh_mpm_fsm(wpa_s, sta, event, reason); } /* called by ap_free_sta */ void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) { if (sta->plink_state == PLINK_ESTAB) hapd->num_plinks--; eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); }