1252190Srpaulo/* 2252190Srpaulo * Wi-Fi Direct - P2P Invitation procedure 3252190Srpaulo * Copyright (c) 2010, Atheros Communications 4252190Srpaulo * 5252190Srpaulo * This software may be distributed under the terms of the BSD license. 6252190Srpaulo * See README for more details. 7252190Srpaulo */ 8252190Srpaulo 9252190Srpaulo#include "includes.h" 10252190Srpaulo 11252190Srpaulo#include "common.h" 12252190Srpaulo#include "common/ieee802_11_defs.h" 13252190Srpaulo#include "p2p_i.h" 14252190Srpaulo#include "p2p.h" 15252190Srpaulo 16252190Srpaulo 17252190Srpaulostatic struct wpabuf * p2p_build_invitation_req(struct p2p_data *p2p, 18252190Srpaulo struct p2p_device *peer, 19252190Srpaulo const u8 *go_dev_addr) 20252190Srpaulo{ 21252190Srpaulo struct wpabuf *buf; 22252190Srpaulo u8 *len; 23252190Srpaulo const u8 *dev_addr; 24252190Srpaulo size_t extra = 0; 25252190Srpaulo 26252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 27252190Srpaulo struct wpabuf *wfd_ie = p2p->wfd_ie_invitation; 28252190Srpaulo if (wfd_ie && p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) { 29252190Srpaulo size_t i; 30252190Srpaulo for (i = 0; i < p2p->num_groups; i++) { 31252190Srpaulo struct p2p_group *g = p2p->groups[i]; 32252190Srpaulo struct wpabuf *ie; 33252190Srpaulo if (os_memcmp(p2p_group_get_interface_addr(g), 34252190Srpaulo p2p->inv_bssid, ETH_ALEN) != 0) 35252190Srpaulo continue; 36252190Srpaulo ie = p2p_group_get_wfd_ie(g); 37252190Srpaulo if (ie) { 38252190Srpaulo wfd_ie = ie; 39252190Srpaulo break; 40252190Srpaulo } 41252190Srpaulo } 42252190Srpaulo } 43252190Srpaulo if (wfd_ie) 44252190Srpaulo extra = wpabuf_len(wfd_ie); 45252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 46252190Srpaulo 47252190Srpaulo buf = wpabuf_alloc(1000 + extra); 48252190Srpaulo if (buf == NULL) 49252190Srpaulo return NULL; 50252190Srpaulo 51252190Srpaulo peer->dialog_token++; 52252190Srpaulo if (peer->dialog_token == 0) 53252190Srpaulo peer->dialog_token = 1; 54252190Srpaulo p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_REQ, 55252190Srpaulo peer->dialog_token); 56252190Srpaulo 57252190Srpaulo len = p2p_buf_add_ie_hdr(buf); 58252190Srpaulo if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO || !p2p->inv_persistent) 59252190Srpaulo p2p_buf_add_config_timeout(buf, 0, 0); 60252190Srpaulo else 61252190Srpaulo p2p_buf_add_config_timeout(buf, p2p->go_timeout, 62252190Srpaulo p2p->client_timeout); 63252190Srpaulo p2p_buf_add_invitation_flags(buf, p2p->inv_persistent ? 64252190Srpaulo P2P_INVITATION_FLAGS_TYPE : 0); 65252190Srpaulo p2p_buf_add_operating_channel(buf, p2p->cfg->country, 66252190Srpaulo p2p->op_reg_class, p2p->op_channel); 67252190Srpaulo if (p2p->inv_bssid_set) 68252190Srpaulo p2p_buf_add_group_bssid(buf, p2p->inv_bssid); 69252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels); 70252190Srpaulo if (go_dev_addr) 71252190Srpaulo dev_addr = go_dev_addr; 72252190Srpaulo else if (p2p->inv_role == P2P_INVITE_ROLE_CLIENT) 73252190Srpaulo dev_addr = peer->info.p2p_device_addr; 74252190Srpaulo else 75252190Srpaulo dev_addr = p2p->cfg->dev_addr; 76252190Srpaulo p2p_buf_add_group_id(buf, dev_addr, p2p->inv_ssid, p2p->inv_ssid_len); 77252190Srpaulo p2p_buf_add_device_info(buf, p2p, peer); 78252190Srpaulo p2p_buf_update_ie_hdr(buf, len); 79252190Srpaulo 80252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 81252190Srpaulo if (wfd_ie) 82252190Srpaulo wpabuf_put_buf(buf, wfd_ie); 83252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 84252190Srpaulo 85252190Srpaulo return buf; 86252190Srpaulo} 87252190Srpaulo 88252190Srpaulo 89252190Srpaulostatic struct wpabuf * p2p_build_invitation_resp(struct p2p_data *p2p, 90252190Srpaulo struct p2p_device *peer, 91252190Srpaulo u8 dialog_token, u8 status, 92252190Srpaulo const u8 *group_bssid, 93252190Srpaulo u8 reg_class, u8 channel, 94252190Srpaulo struct p2p_channels *channels) 95252190Srpaulo{ 96252190Srpaulo struct wpabuf *buf; 97252190Srpaulo u8 *len; 98252190Srpaulo size_t extra = 0; 99252190Srpaulo 100252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 101252190Srpaulo struct wpabuf *wfd_ie = p2p->wfd_ie_invitation; 102252190Srpaulo if (wfd_ie && group_bssid) { 103252190Srpaulo size_t i; 104252190Srpaulo for (i = 0; i < p2p->num_groups; i++) { 105252190Srpaulo struct p2p_group *g = p2p->groups[i]; 106252190Srpaulo struct wpabuf *ie; 107252190Srpaulo if (os_memcmp(p2p_group_get_interface_addr(g), 108252190Srpaulo group_bssid, ETH_ALEN) != 0) 109252190Srpaulo continue; 110252190Srpaulo ie = p2p_group_get_wfd_ie(g); 111252190Srpaulo if (ie) { 112252190Srpaulo wfd_ie = ie; 113252190Srpaulo break; 114252190Srpaulo } 115252190Srpaulo } 116252190Srpaulo } 117252190Srpaulo if (wfd_ie) 118252190Srpaulo extra = wpabuf_len(wfd_ie); 119252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 120252190Srpaulo 121252190Srpaulo buf = wpabuf_alloc(1000 + extra); 122252190Srpaulo if (buf == NULL) 123252190Srpaulo return NULL; 124252190Srpaulo 125252190Srpaulo p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_RESP, 126252190Srpaulo dialog_token); 127252190Srpaulo 128252190Srpaulo len = p2p_buf_add_ie_hdr(buf); 129252190Srpaulo p2p_buf_add_status(buf, status); 130252190Srpaulo p2p_buf_add_config_timeout(buf, 0, 0); /* FIX */ 131252190Srpaulo if (reg_class && channel) 132252190Srpaulo p2p_buf_add_operating_channel(buf, p2p->cfg->country, 133252190Srpaulo reg_class, channel); 134252190Srpaulo if (group_bssid) 135252190Srpaulo p2p_buf_add_group_bssid(buf, group_bssid); 136252190Srpaulo if (channels) 137252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, channels); 138252190Srpaulo p2p_buf_update_ie_hdr(buf, len); 139252190Srpaulo 140252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 141252190Srpaulo if (wfd_ie) 142252190Srpaulo wpabuf_put_buf(buf, wfd_ie); 143252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 144252190Srpaulo 145252190Srpaulo return buf; 146252190Srpaulo} 147252190Srpaulo 148252190Srpaulo 149252190Srpaulovoid p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa, 150252190Srpaulo const u8 *data, size_t len, int rx_freq) 151252190Srpaulo{ 152252190Srpaulo struct p2p_device *dev; 153252190Srpaulo struct p2p_message msg; 154252190Srpaulo struct wpabuf *resp = NULL; 155252190Srpaulo u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 156252190Srpaulo int freq; 157252190Srpaulo int go = 0; 158252190Srpaulo u8 group_bssid[ETH_ALEN], *bssid; 159252190Srpaulo int op_freq = 0; 160252190Srpaulo u8 reg_class = 0, channel = 0; 161252190Srpaulo struct p2p_channels intersection, *channels = NULL; 162252190Srpaulo int persistent; 163252190Srpaulo 164252190Srpaulo os_memset(group_bssid, 0, sizeof(group_bssid)); 165252190Srpaulo 166252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 167252190Srpaulo "P2P: Received Invitation Request from " MACSTR " (freq=%d)", 168252190Srpaulo MAC2STR(sa), rx_freq); 169252190Srpaulo 170252190Srpaulo if (p2p_parse(data, len, &msg)) 171252190Srpaulo return; 172252190Srpaulo 173252190Srpaulo dev = p2p_get_device(p2p, sa); 174252190Srpaulo if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) { 175252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 176252190Srpaulo "P2P: Invitation Request from unknown peer " 177252190Srpaulo MACSTR, MAC2STR(sa)); 178252190Srpaulo 179252190Srpaulo if (p2p_add_device(p2p, sa, rx_freq, 0, 0, data + 1, len - 1, 180252190Srpaulo 0)) { 181252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 182252190Srpaulo "P2P: Invitation Request add device failed " 183252190Srpaulo MACSTR, MAC2STR(sa)); 184252190Srpaulo status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 185252190Srpaulo goto fail; 186252190Srpaulo } 187252190Srpaulo 188252190Srpaulo dev = p2p_get_device(p2p, sa); 189252190Srpaulo if (dev == NULL) { 190252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 191252190Srpaulo "P2P: Reject Invitation Request from unknown " 192252190Srpaulo "peer " MACSTR, MAC2STR(sa)); 193252190Srpaulo status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 194252190Srpaulo goto fail; 195252190Srpaulo } 196252190Srpaulo } 197252190Srpaulo 198252190Srpaulo if (!msg.group_id || !msg.channel_list) { 199252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 200252190Srpaulo "P2P: Mandatory attribute missing in Invitation " 201252190Srpaulo "Request from " MACSTR, MAC2STR(sa)); 202252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 203252190Srpaulo goto fail; 204252190Srpaulo } 205252190Srpaulo 206252190Srpaulo if (msg.invitation_flags) 207252190Srpaulo persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE; 208252190Srpaulo else { 209252190Srpaulo /* Invitation Flags is a mandatory attribute starting from P2P 210252190Srpaulo * spec 1.06. As a backwards compatibility mechanism, assume 211252190Srpaulo * the request was for a persistent group if the attribute is 212252190Srpaulo * missing. 213252190Srpaulo */ 214252190Srpaulo wpa_printf(MSG_DEBUG, "P2P: Mandatory Invitation Flags " 215252190Srpaulo "attribute missing from Invitation Request"); 216252190Srpaulo persistent = 1; 217252190Srpaulo } 218252190Srpaulo 219252190Srpaulo if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev, 220252190Srpaulo msg.channel_list, msg.channel_list_len) < 221252190Srpaulo 0) { 222252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 223252190Srpaulo "P2P: No common channels found"); 224252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 225252190Srpaulo goto fail; 226252190Srpaulo } 227252190Srpaulo 228252190Srpaulo if (p2p->cfg->invitation_process) { 229252190Srpaulo status = p2p->cfg->invitation_process( 230252190Srpaulo p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id, 231252190Srpaulo msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN, 232252190Srpaulo &go, group_bssid, &op_freq, persistent); 233252190Srpaulo } 234252190Srpaulo 235252190Srpaulo if (op_freq) { 236252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Invitation " 237252190Srpaulo "processing forced frequency %d MHz", op_freq); 238252190Srpaulo if (p2p_freq_to_channel(p2p->cfg->country, op_freq, 239252190Srpaulo ®_class, &channel) < 0) { 240252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 241252190Srpaulo "P2P: Unknown forced freq %d MHz from " 242252190Srpaulo "invitation_process()", op_freq); 243252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 244252190Srpaulo goto fail; 245252190Srpaulo } 246252190Srpaulo 247252190Srpaulo p2p_channels_intersect(&p2p->cfg->channels, &dev->channels, 248252190Srpaulo &intersection); 249252190Srpaulo if (!p2p_channels_includes(&intersection, reg_class, channel)) 250252190Srpaulo { 251252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 252252190Srpaulo "P2P: forced freq %d MHz not in the supported " 253252190Srpaulo "channels interaction", op_freq); 254252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 255252190Srpaulo goto fail; 256252190Srpaulo } 257252190Srpaulo 258252190Srpaulo if (status == P2P_SC_SUCCESS) 259252190Srpaulo channels = &intersection; 260252190Srpaulo } else { 261252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 262252190Srpaulo "P2P: No forced channel from invitation processing - " 263252190Srpaulo "figure out best one to use"); 264252190Srpaulo 265252190Srpaulo p2p_channels_intersect(&p2p->cfg->channels, &dev->channels, 266252190Srpaulo &intersection); 267252190Srpaulo /* Default to own configuration as a starting point */ 268252190Srpaulo p2p->op_reg_class = p2p->cfg->op_reg_class; 269252190Srpaulo p2p->op_channel = p2p->cfg->op_channel; 270252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Own default " 271252190Srpaulo "op_class %d channel %d", 272252190Srpaulo p2p->op_reg_class, p2p->op_channel); 273252190Srpaulo 274252190Srpaulo /* Use peer preference if specified and compatible */ 275252190Srpaulo if (msg.operating_channel) { 276252190Srpaulo int req_freq; 277252190Srpaulo req_freq = p2p_channel_to_freq( 278252190Srpaulo (const char *) msg.operating_channel, 279252190Srpaulo msg.operating_channel[3], 280252190Srpaulo msg.operating_channel[4]); 281252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " 282252190Srpaulo "operating channel preference: %d MHz", 283252190Srpaulo req_freq); 284252190Srpaulo if (req_freq > 0 && 285252190Srpaulo p2p_channels_includes(&intersection, 286252190Srpaulo msg.operating_channel[3], 287252190Srpaulo msg.operating_channel[4])) { 288252190Srpaulo p2p->op_reg_class = msg.operating_channel[3]; 289252190Srpaulo p2p->op_channel = msg.operating_channel[4]; 290252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 291252190Srpaulo "P2P: Use peer preference op_class %d " 292252190Srpaulo "channel %d", 293252190Srpaulo p2p->op_reg_class, p2p->op_channel); 294252190Srpaulo } else { 295252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 296252190Srpaulo "P2P: Cannot use peer channel " 297252190Srpaulo "preference"); 298252190Srpaulo } 299252190Srpaulo } 300252190Srpaulo 301252190Srpaulo if (!p2p_channels_includes(&intersection, p2p->op_reg_class, 302252190Srpaulo p2p->op_channel)) { 303252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 304252190Srpaulo "P2P: Initially selected channel (op_class %d " 305252190Srpaulo "channel %d) not in channel intersection - try " 306252190Srpaulo "to reselect", 307252190Srpaulo p2p->op_reg_class, p2p->op_channel); 308252190Srpaulo p2p_reselect_channel(p2p, &intersection); 309252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 310252190Srpaulo "P2P: Re-selection result: op_class %d " 311252190Srpaulo "channel %d", 312252190Srpaulo p2p->op_reg_class, p2p->op_channel); 313252190Srpaulo if (!p2p_channels_includes(&intersection, 314252190Srpaulo p2p->op_reg_class, 315252190Srpaulo p2p->op_channel)) { 316252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 317252190Srpaulo "P2P: Peer does not support selected " 318252190Srpaulo "operating channel (reg_class=%u " 319252190Srpaulo "channel=%u)", 320252190Srpaulo p2p->op_reg_class, p2p->op_channel); 321252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 322252190Srpaulo goto fail; 323252190Srpaulo } 324252190Srpaulo } 325252190Srpaulo 326252190Srpaulo op_freq = p2p_channel_to_freq(p2p->cfg->country, 327252190Srpaulo p2p->op_reg_class, 328252190Srpaulo p2p->op_channel); 329252190Srpaulo if (op_freq < 0) { 330252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 331252190Srpaulo "P2P: Unknown operational channel " 332252190Srpaulo "(country=%c%c reg_class=%u channel=%u)", 333252190Srpaulo p2p->cfg->country[0], p2p->cfg->country[1], 334252190Srpaulo p2p->op_reg_class, p2p->op_channel); 335252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 336252190Srpaulo goto fail; 337252190Srpaulo } 338252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Selected operating " 339252190Srpaulo "channel - %d MHz", op_freq); 340252190Srpaulo 341252190Srpaulo if (status == P2P_SC_SUCCESS) { 342252190Srpaulo reg_class = p2p->op_reg_class; 343252190Srpaulo channel = p2p->op_channel; 344252190Srpaulo channels = &intersection; 345252190Srpaulo } 346252190Srpaulo } 347252190Srpaulo 348252190Srpaulofail: 349252190Srpaulo if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid)) 350252190Srpaulo bssid = group_bssid; 351252190Srpaulo else 352252190Srpaulo bssid = NULL; 353252190Srpaulo resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status, 354252190Srpaulo bssid, reg_class, channel, channels); 355252190Srpaulo 356252190Srpaulo if (resp == NULL) 357252190Srpaulo goto out; 358252190Srpaulo 359252190Srpaulo if (rx_freq > 0) 360252190Srpaulo freq = rx_freq; 361252190Srpaulo else 362252190Srpaulo freq = p2p_channel_to_freq(p2p->cfg->country, 363252190Srpaulo p2p->cfg->reg_class, 364252190Srpaulo p2p->cfg->channel); 365252190Srpaulo if (freq < 0) { 366252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 367252190Srpaulo "P2P: Unknown regulatory class/channel"); 368252190Srpaulo goto out; 369252190Srpaulo } 370252190Srpaulo 371252190Srpaulo /* 372252190Srpaulo * Store copy of invitation data to be used when processing TX status 373252190Srpaulo * callback for the Acton frame. 374252190Srpaulo */ 375252190Srpaulo os_memcpy(p2p->inv_sa, sa, ETH_ALEN); 376252190Srpaulo if (msg.group_bssid) { 377252190Srpaulo os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN); 378252190Srpaulo p2p->inv_group_bssid_ptr = p2p->inv_group_bssid; 379252190Srpaulo } else 380252190Srpaulo p2p->inv_group_bssid_ptr = NULL; 381252190Srpaulo if (msg.group_id_len - ETH_ALEN <= 32) { 382252190Srpaulo os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN, 383252190Srpaulo msg.group_id_len - ETH_ALEN); 384252190Srpaulo p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN; 385252190Srpaulo } 386252190Srpaulo os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN); 387252190Srpaulo p2p->inv_status = status; 388252190Srpaulo p2p->inv_op_freq = op_freq; 389252190Srpaulo 390252190Srpaulo p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE; 391252190Srpaulo if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, 392252190Srpaulo p2p->cfg->dev_addr, 393252190Srpaulo wpabuf_head(resp), wpabuf_len(resp), 200) < 0) { 394252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 395252190Srpaulo "P2P: Failed to send Action frame"); 396252190Srpaulo } 397252190Srpaulo 398252190Srpauloout: 399252190Srpaulo wpabuf_free(resp); 400252190Srpaulo p2p_parse_free(&msg); 401252190Srpaulo} 402252190Srpaulo 403252190Srpaulo 404252190Srpaulovoid p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa, 405252190Srpaulo const u8 *data, size_t len) 406252190Srpaulo{ 407252190Srpaulo struct p2p_device *dev; 408252190Srpaulo struct p2p_message msg; 409252190Srpaulo 410252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 411252190Srpaulo "P2P: Received Invitation Response from " MACSTR, 412252190Srpaulo MAC2STR(sa)); 413252190Srpaulo 414252190Srpaulo dev = p2p_get_device(p2p, sa); 415252190Srpaulo if (dev == NULL) { 416252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 417252190Srpaulo "P2P: Ignore Invitation Response from unknown peer " 418252190Srpaulo MACSTR, MAC2STR(sa)); 419252190Srpaulo return; 420252190Srpaulo } 421252190Srpaulo 422252190Srpaulo if (dev != p2p->invite_peer) { 423252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 424252190Srpaulo "P2P: Ignore unexpected Invitation Response from peer " 425252190Srpaulo MACSTR, MAC2STR(sa)); 426252190Srpaulo return; 427252190Srpaulo } 428252190Srpaulo 429252190Srpaulo if (p2p_parse(data, len, &msg)) 430252190Srpaulo return; 431252190Srpaulo 432252190Srpaulo if (!msg.status) { 433252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 434252190Srpaulo "P2P: Mandatory Status attribute missing in " 435252190Srpaulo "Invitation Response from " MACSTR, MAC2STR(sa)); 436252190Srpaulo p2p_parse_free(&msg); 437252190Srpaulo return; 438252190Srpaulo } 439252190Srpaulo 440252190Srpaulo if (p2p->cfg->invitation_result) 441252190Srpaulo p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status, 442252190Srpaulo msg.group_bssid); 443252190Srpaulo 444252190Srpaulo p2p_parse_free(&msg); 445252190Srpaulo 446252190Srpaulo p2p_clear_timeout(p2p); 447252190Srpaulo p2p_set_state(p2p, P2P_IDLE); 448252190Srpaulo p2p->invite_peer = NULL; 449252190Srpaulo} 450252190Srpaulo 451252190Srpaulo 452252190Srpauloint p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev, 453252190Srpaulo const u8 *go_dev_addr) 454252190Srpaulo{ 455252190Srpaulo struct wpabuf *req; 456252190Srpaulo int freq; 457252190Srpaulo 458252190Srpaulo freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; 459252190Srpaulo if (freq <= 0) { 460252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 461252190Srpaulo "P2P: No Listen/Operating frequency known for the " 462252190Srpaulo "peer " MACSTR " to send Invitation Request", 463252190Srpaulo MAC2STR(dev->info.p2p_device_addr)); 464252190Srpaulo return -1; 465252190Srpaulo } 466252190Srpaulo 467252190Srpaulo req = p2p_build_invitation_req(p2p, dev, go_dev_addr); 468252190Srpaulo if (req == NULL) 469252190Srpaulo return -1; 470252190Srpaulo if (p2p->state != P2P_IDLE) 471252190Srpaulo p2p_stop_listen_for_freq(p2p, freq); 472252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 473252190Srpaulo "P2P: Sending Invitation Request"); 474252190Srpaulo p2p_set_state(p2p, P2P_INVITE); 475252190Srpaulo p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST; 476252190Srpaulo p2p->invite_peer = dev; 477252190Srpaulo dev->invitation_reqs++; 478252190Srpaulo if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, 479252190Srpaulo p2p->cfg->dev_addr, dev->info.p2p_device_addr, 480252190Srpaulo wpabuf_head(req), wpabuf_len(req), 200) < 0) { 481252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 482252190Srpaulo "P2P: Failed to send Action frame"); 483252190Srpaulo /* Use P2P find to recover and retry */ 484252190Srpaulo p2p_set_timeout(p2p, 0, 0); 485252190Srpaulo } 486252190Srpaulo 487252190Srpaulo wpabuf_free(req); 488252190Srpaulo 489252190Srpaulo return 0; 490252190Srpaulo} 491252190Srpaulo 492252190Srpaulo 493252190Srpaulovoid p2p_invitation_req_cb(struct p2p_data *p2p, int success) 494252190Srpaulo{ 495252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 496252190Srpaulo "P2P: Invitation Request TX callback: success=%d", success); 497252190Srpaulo 498252190Srpaulo if (p2p->invite_peer == NULL) { 499252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 500252190Srpaulo "P2P: No pending Invite"); 501252190Srpaulo return; 502252190Srpaulo } 503252190Srpaulo 504252190Srpaulo /* 505252190Srpaulo * Use P2P find, if needed, to find the other device from its listen 506252190Srpaulo * channel. 507252190Srpaulo */ 508252190Srpaulo p2p_set_state(p2p, P2P_INVITE); 509252190Srpaulo p2p_set_timeout(p2p, 0, 100000); 510252190Srpaulo} 511252190Srpaulo 512252190Srpaulo 513252190Srpaulovoid p2p_invitation_resp_cb(struct p2p_data *p2p, int success) 514252190Srpaulo{ 515252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 516252190Srpaulo "P2P: Invitation Response TX callback: success=%d", success); 517252190Srpaulo p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 518252190Srpaulo 519252190Srpaulo if (success && p2p->cfg->invitation_received) { 520252190Srpaulo p2p->cfg->invitation_received(p2p->cfg->cb_ctx, 521252190Srpaulo p2p->inv_sa, 522252190Srpaulo p2p->inv_group_bssid_ptr, 523252190Srpaulo p2p->inv_ssid, p2p->inv_ssid_len, 524252190Srpaulo p2p->inv_go_dev_addr, 525252190Srpaulo p2p->inv_status, 526252190Srpaulo p2p->inv_op_freq); 527252190Srpaulo } 528252190Srpaulo} 529252190Srpaulo 530252190Srpaulo 531252190Srpauloint p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role, 532252190Srpaulo const u8 *bssid, const u8 *ssid, size_t ssid_len, 533252190Srpaulo unsigned int force_freq, const u8 *go_dev_addr, 534252190Srpaulo int persistent_group) 535252190Srpaulo{ 536252190Srpaulo struct p2p_device *dev; 537252190Srpaulo 538252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 539252190Srpaulo "P2P: Request to invite peer " MACSTR " role=%d persistent=%d " 540252190Srpaulo "force_freq=%u", 541252190Srpaulo MAC2STR(peer), role, persistent_group, force_freq); 542252190Srpaulo if (bssid) 543252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 544252190Srpaulo "P2P: Invitation for BSSID " MACSTR, MAC2STR(bssid)); 545252190Srpaulo if (go_dev_addr) { 546252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 547252190Srpaulo "P2P: Invitation for GO Device Address " MACSTR, 548252190Srpaulo MAC2STR(go_dev_addr)); 549252190Srpaulo os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN); 550252190Srpaulo p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf; 551252190Srpaulo } else 552252190Srpaulo p2p->invite_go_dev_addr = NULL; 553252190Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "P2P: Invitation for SSID", 554252190Srpaulo ssid, ssid_len); 555252190Srpaulo 556252190Srpaulo dev = p2p_get_device(p2p, peer); 557252190Srpaulo if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0)) { 558252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 559252190Srpaulo "P2P: Cannot invite unknown P2P Device " MACSTR, 560252190Srpaulo MAC2STR(peer)); 561252190Srpaulo return -1; 562252190Srpaulo } 563252190Srpaulo 564252190Srpaulo if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) { 565252190Srpaulo if (!(dev->info.dev_capab & 566252190Srpaulo P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { 567252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 568252190Srpaulo "P2P: Cannot invite a P2P Device " MACSTR 569252190Srpaulo " that is in a group and is not discoverable", 570252190Srpaulo MAC2STR(peer)); 571252190Srpaulo } 572252190Srpaulo /* TODO: use device discoverability request through GO */ 573252190Srpaulo } 574252190Srpaulo 575252190Srpaulo dev->invitation_reqs = 0; 576252190Srpaulo 577252190Srpaulo if (force_freq) { 578252190Srpaulo if (p2p_freq_to_channel(p2p->cfg->country, force_freq, 579252190Srpaulo &p2p->op_reg_class, &p2p->op_channel) < 580252190Srpaulo 0) { 581252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 582252190Srpaulo "P2P: Unsupported frequency %u MHz", 583252190Srpaulo force_freq); 584252190Srpaulo return -1; 585252190Srpaulo } 586252190Srpaulo p2p->channels.reg_classes = 1; 587252190Srpaulo p2p->channels.reg_class[0].channels = 1; 588252190Srpaulo p2p->channels.reg_class[0].reg_class = p2p->op_reg_class; 589252190Srpaulo p2p->channels.reg_class[0].channel[0] = p2p->op_channel; 590252190Srpaulo } else { 591252190Srpaulo p2p->op_reg_class = p2p->cfg->op_reg_class; 592252190Srpaulo p2p->op_channel = p2p->cfg->op_channel; 593252190Srpaulo os_memcpy(&p2p->channels, &p2p->cfg->channels, 594252190Srpaulo sizeof(struct p2p_channels)); 595252190Srpaulo } 596252190Srpaulo 597252190Srpaulo if (p2p->state != P2P_IDLE) 598252190Srpaulo p2p_stop_find(p2p); 599252190Srpaulo 600252190Srpaulo p2p->inv_role = role; 601252190Srpaulo p2p->inv_bssid_set = bssid != NULL; 602252190Srpaulo if (bssid) 603252190Srpaulo os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN); 604252190Srpaulo os_memcpy(p2p->inv_ssid, ssid, ssid_len); 605252190Srpaulo p2p->inv_ssid_len = ssid_len; 606252190Srpaulo p2p->inv_persistent = persistent_group; 607252190Srpaulo return p2p_invite_send(p2p, dev, go_dev_addr); 608252190Srpaulo} 609