1252190Srpaulo/* 2252190Srpaulo * Wi-Fi Direct - P2P Group Owner Negotiation 3252190Srpaulo * Copyright (c) 2009-2010, 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 "wps/wps_defs.h" 14252190Srpaulo#include "p2p_i.h" 15252190Srpaulo#include "p2p.h" 16252190Srpaulo 17252190Srpaulo 18252190Srpaulostatic int p2p_go_det(u8 own_intent, u8 peer_value) 19252190Srpaulo{ 20252190Srpaulo u8 peer_intent = peer_value >> 1; 21252190Srpaulo if (own_intent == peer_intent) { 22252190Srpaulo if (own_intent == P2P_MAX_GO_INTENT) 23252190Srpaulo return -1; /* both devices want to become GO */ 24252190Srpaulo 25252190Srpaulo /* Use tie breaker bit to determine GO */ 26252190Srpaulo return (peer_value & 0x01) ? 0 : 1; 27252190Srpaulo } 28252190Srpaulo 29252190Srpaulo return own_intent > peer_intent; 30252190Srpaulo} 31252190Srpaulo 32252190Srpaulo 33252190Srpauloint p2p_peer_channels_check(struct p2p_data *p2p, struct p2p_channels *own, 34252190Srpaulo struct p2p_device *dev, 35252190Srpaulo const u8 *channel_list, size_t channel_list_len) 36252190Srpaulo{ 37252190Srpaulo const u8 *pos, *end; 38252190Srpaulo struct p2p_channels *ch; 39252190Srpaulo size_t channels; 40252190Srpaulo struct p2p_channels intersection; 41252190Srpaulo 42252190Srpaulo ch = &dev->channels; 43252190Srpaulo os_memset(ch, 0, sizeof(*ch)); 44252190Srpaulo pos = channel_list; 45252190Srpaulo end = channel_list + channel_list_len; 46252190Srpaulo 47252190Srpaulo if (end - pos < 3) 48252190Srpaulo return -1; 49252190Srpaulo os_memcpy(dev->country, pos, 3); 50252190Srpaulo wpa_hexdump_ascii(MSG_DEBUG, "P2P: Peer country", pos, 3); 51252190Srpaulo if (pos[2] != 0x04 && os_memcmp(pos, p2p->cfg->country, 2) != 0) { 52252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 53252190Srpaulo "P2P: Mismatching country (ours=%c%c peer's=%c%c)", 54252190Srpaulo p2p->cfg->country[0], p2p->cfg->country[1], 55252190Srpaulo pos[0], pos[1]); 56252190Srpaulo return -1; 57252190Srpaulo } 58252190Srpaulo pos += 3; 59252190Srpaulo 60252190Srpaulo while (pos + 2 < end) { 61252190Srpaulo struct p2p_reg_class *cl = &ch->reg_class[ch->reg_classes]; 62252190Srpaulo cl->reg_class = *pos++; 63252190Srpaulo if (pos + 1 + pos[0] > end) { 64252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 65252190Srpaulo "P2P: Invalid peer Channel List"); 66252190Srpaulo return -1; 67252190Srpaulo } 68252190Srpaulo channels = *pos++; 69252190Srpaulo cl->channels = channels > P2P_MAX_REG_CLASS_CHANNELS ? 70252190Srpaulo P2P_MAX_REG_CLASS_CHANNELS : channels; 71252190Srpaulo os_memcpy(cl->channel, pos, cl->channels); 72252190Srpaulo pos += channels; 73252190Srpaulo ch->reg_classes++; 74252190Srpaulo if (ch->reg_classes == P2P_MAX_REG_CLASSES) 75252190Srpaulo break; 76252190Srpaulo } 77252190Srpaulo 78252190Srpaulo p2p_channels_intersect(own, &dev->channels, &intersection); 79252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Own reg_classes %d " 80252190Srpaulo "peer reg_classes %d intersection reg_classes %d", 81252190Srpaulo (int) own->reg_classes, 82252190Srpaulo (int) dev->channels.reg_classes, 83252190Srpaulo (int) intersection.reg_classes); 84252190Srpaulo if (intersection.reg_classes == 0) { 85252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, 86252190Srpaulo "P2P: No common channels found"); 87252190Srpaulo return -1; 88252190Srpaulo } 89252190Srpaulo return 0; 90252190Srpaulo} 91252190Srpaulo 92252190Srpaulo 93252190Srpaulostatic int p2p_peer_channels(struct p2p_data *p2p, struct p2p_device *dev, 94252190Srpaulo const u8 *channel_list, size_t channel_list_len) 95252190Srpaulo{ 96252190Srpaulo return p2p_peer_channels_check(p2p, &p2p->channels, dev, 97252190Srpaulo channel_list, channel_list_len); 98252190Srpaulo} 99252190Srpaulo 100252190Srpaulo 101252190Srpaulou16 p2p_wps_method_pw_id(enum p2p_wps_method wps_method) 102252190Srpaulo{ 103252190Srpaulo switch (wps_method) { 104252190Srpaulo case WPS_PIN_DISPLAY: 105252190Srpaulo return DEV_PW_REGISTRAR_SPECIFIED; 106252190Srpaulo case WPS_PIN_KEYPAD: 107252190Srpaulo return DEV_PW_USER_SPECIFIED; 108252190Srpaulo case WPS_PBC: 109252190Srpaulo return DEV_PW_PUSHBUTTON; 110252190Srpaulo default: 111252190Srpaulo return DEV_PW_DEFAULT; 112252190Srpaulo } 113252190Srpaulo} 114252190Srpaulo 115252190Srpaulo 116252190Srpaulostatic const char * p2p_wps_method_str(enum p2p_wps_method wps_method) 117252190Srpaulo{ 118252190Srpaulo switch (wps_method) { 119252190Srpaulo case WPS_PIN_DISPLAY: 120252190Srpaulo return "Display"; 121252190Srpaulo case WPS_PIN_KEYPAD: 122252190Srpaulo return "Keypad"; 123252190Srpaulo case WPS_PBC: 124252190Srpaulo return "PBC"; 125252190Srpaulo default: 126252190Srpaulo return "??"; 127252190Srpaulo } 128252190Srpaulo} 129252190Srpaulo 130252190Srpaulo 131252190Srpaulostatic struct wpabuf * p2p_build_go_neg_req(struct p2p_data *p2p, 132252190Srpaulo struct p2p_device *peer) 133252190Srpaulo{ 134252190Srpaulo struct wpabuf *buf; 135252190Srpaulo u8 *len; 136252190Srpaulo u8 group_capab; 137252190Srpaulo size_t extra = 0; 138252190Srpaulo 139252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 140252190Srpaulo if (p2p->wfd_ie_go_neg) 141252190Srpaulo extra = wpabuf_len(p2p->wfd_ie_go_neg); 142252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 143252190Srpaulo 144252190Srpaulo buf = wpabuf_alloc(1000 + extra); 145252190Srpaulo if (buf == NULL) 146252190Srpaulo return NULL; 147252190Srpaulo 148252190Srpaulo peer->dialog_token++; 149252190Srpaulo if (peer->dialog_token == 0) 150252190Srpaulo peer->dialog_token = 1; 151252190Srpaulo p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_REQ, peer->dialog_token); 152252190Srpaulo 153252190Srpaulo len = p2p_buf_add_ie_hdr(buf); 154252190Srpaulo group_capab = 0; 155252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 156252190Srpaulo group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP; 157252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 158252190Srpaulo group_capab |= P2P_GROUP_CAPAB_PERSISTENT_RECONN; 159252190Srpaulo } 160252190Srpaulo if (p2p->cross_connect) 161252190Srpaulo group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 162252190Srpaulo if (p2p->cfg->p2p_intra_bss) 163252190Srpaulo group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST; 164252190Srpaulo p2p_buf_add_capability(buf, p2p->dev_capab & 165252190Srpaulo ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 166252190Srpaulo group_capab); 167252190Srpaulo p2p_buf_add_go_intent(buf, (p2p->go_intent << 1) | 168252190Srpaulo p2p->next_tie_breaker); 169252190Srpaulo p2p->next_tie_breaker = !p2p->next_tie_breaker; 170252190Srpaulo p2p_buf_add_config_timeout(buf, p2p->go_timeout, p2p->client_timeout); 171252190Srpaulo p2p_buf_add_listen_channel(buf, p2p->cfg->country, p2p->cfg->reg_class, 172252190Srpaulo p2p->cfg->channel); 173252190Srpaulo if (p2p->ext_listen_interval) 174252190Srpaulo p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period, 175252190Srpaulo p2p->ext_listen_interval); 176252190Srpaulo p2p_buf_add_intended_addr(buf, p2p->intended_addr); 177252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels); 178252190Srpaulo p2p_buf_add_device_info(buf, p2p, peer); 179252190Srpaulo p2p_buf_add_operating_channel(buf, p2p->cfg->country, 180252190Srpaulo p2p->op_reg_class, p2p->op_channel); 181252190Srpaulo p2p_buf_update_ie_hdr(buf, len); 182252190Srpaulo 183252190Srpaulo /* WPS IE with Device Password ID attribute */ 184252190Srpaulo p2p_build_wps_ie(p2p, buf, p2p_wps_method_pw_id(peer->wps_method), 0); 185252190Srpaulo 186252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 187252190Srpaulo if (p2p->wfd_ie_go_neg) 188252190Srpaulo wpabuf_put_buf(buf, p2p->wfd_ie_go_neg); 189252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 190252190Srpaulo 191252190Srpaulo return buf; 192252190Srpaulo} 193252190Srpaulo 194252190Srpaulo 195252190Srpauloint p2p_connect_send(struct p2p_data *p2p, struct p2p_device *dev) 196252190Srpaulo{ 197252190Srpaulo struct wpabuf *req; 198252190Srpaulo int freq; 199252190Srpaulo 200252190Srpaulo if (dev->flags & P2P_DEV_PD_BEFORE_GO_NEG) { 201252190Srpaulo u16 config_method; 202252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 203252190Srpaulo "P2P: Use PD-before-GO-Neg workaround for " MACSTR, 204252190Srpaulo MAC2STR(dev->info.p2p_device_addr)); 205252190Srpaulo if (dev->wps_method == WPS_PIN_DISPLAY) 206252190Srpaulo config_method = WPS_CONFIG_KEYPAD; 207252190Srpaulo else if (dev->wps_method == WPS_PIN_KEYPAD) 208252190Srpaulo config_method = WPS_CONFIG_DISPLAY; 209252190Srpaulo else if (dev->wps_method == WPS_PBC) 210252190Srpaulo config_method = WPS_CONFIG_PUSHBUTTON; 211252190Srpaulo else 212252190Srpaulo return -1; 213252190Srpaulo return p2p_prov_disc_req(p2p, dev->info.p2p_device_addr, 214252190Srpaulo config_method, 0, 0, 1); 215252190Srpaulo } 216252190Srpaulo 217252190Srpaulo freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; 218252190Srpaulo if (freq <= 0) { 219252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 220252190Srpaulo "P2P: No Listen/Operating frequency known for the " 221252190Srpaulo "peer " MACSTR " to send GO Negotiation Request", 222252190Srpaulo MAC2STR(dev->info.p2p_device_addr)); 223252190Srpaulo return -1; 224252190Srpaulo } 225252190Srpaulo 226252190Srpaulo req = p2p_build_go_neg_req(p2p, dev); 227252190Srpaulo if (req == NULL) 228252190Srpaulo return -1; 229252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 230252190Srpaulo "P2P: Sending GO Negotiation Request"); 231252190Srpaulo p2p_set_state(p2p, P2P_CONNECT); 232252190Srpaulo p2p->pending_action_state = P2P_PENDING_GO_NEG_REQUEST; 233252190Srpaulo p2p->go_neg_peer = dev; 234252190Srpaulo dev->flags |= P2P_DEV_WAIT_GO_NEG_RESPONSE; 235252190Srpaulo dev->connect_reqs++; 236252190Srpaulo if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, 237252190Srpaulo p2p->cfg->dev_addr, dev->info.p2p_device_addr, 238252190Srpaulo wpabuf_head(req), wpabuf_len(req), 200) < 0) { 239252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 240252190Srpaulo "P2P: Failed to send Action frame"); 241252190Srpaulo /* Use P2P find to recover and retry */ 242252190Srpaulo p2p_set_timeout(p2p, 0, 0); 243252190Srpaulo } else 244252190Srpaulo dev->go_neg_req_sent++; 245252190Srpaulo 246252190Srpaulo wpabuf_free(req); 247252190Srpaulo 248252190Srpaulo return 0; 249252190Srpaulo} 250252190Srpaulo 251252190Srpaulo 252252190Srpaulostatic struct wpabuf * p2p_build_go_neg_resp(struct p2p_data *p2p, 253252190Srpaulo struct p2p_device *peer, 254252190Srpaulo u8 dialog_token, u8 status, 255252190Srpaulo u8 tie_breaker) 256252190Srpaulo{ 257252190Srpaulo struct wpabuf *buf; 258252190Srpaulo u8 *len; 259252190Srpaulo u8 group_capab; 260252190Srpaulo size_t extra = 0; 261252190Srpaulo 262252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 263252190Srpaulo "P2P: Building GO Negotiation Response"); 264252190Srpaulo 265252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 266252190Srpaulo if (p2p->wfd_ie_go_neg) 267252190Srpaulo extra = wpabuf_len(p2p->wfd_ie_go_neg); 268252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 269252190Srpaulo 270252190Srpaulo buf = wpabuf_alloc(1000 + extra); 271252190Srpaulo if (buf == NULL) 272252190Srpaulo return NULL; 273252190Srpaulo 274252190Srpaulo p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_RESP, dialog_token); 275252190Srpaulo 276252190Srpaulo len = p2p_buf_add_ie_hdr(buf); 277252190Srpaulo p2p_buf_add_status(buf, status); 278252190Srpaulo group_capab = 0; 279252190Srpaulo if (peer && peer->go_state == LOCAL_GO) { 280252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 281252190Srpaulo group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP; 282252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 283252190Srpaulo group_capab |= 284252190Srpaulo P2P_GROUP_CAPAB_PERSISTENT_RECONN; 285252190Srpaulo } 286252190Srpaulo if (p2p->cross_connect) 287252190Srpaulo group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 288252190Srpaulo if (p2p->cfg->p2p_intra_bss) 289252190Srpaulo group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST; 290252190Srpaulo } 291252190Srpaulo p2p_buf_add_capability(buf, p2p->dev_capab & 292252190Srpaulo ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 293252190Srpaulo group_capab); 294252190Srpaulo p2p_buf_add_go_intent(buf, (p2p->go_intent << 1) | tie_breaker); 295252190Srpaulo p2p_buf_add_config_timeout(buf, p2p->go_timeout, p2p->client_timeout); 296252190Srpaulo if (peer && peer->go_state == REMOTE_GO) { 297252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Omit Operating " 298252190Srpaulo "Channel attribute"); 299252190Srpaulo } else { 300252190Srpaulo p2p_buf_add_operating_channel(buf, p2p->cfg->country, 301252190Srpaulo p2p->op_reg_class, 302252190Srpaulo p2p->op_channel); 303252190Srpaulo } 304252190Srpaulo p2p_buf_add_intended_addr(buf, p2p->intended_addr); 305252190Srpaulo if (status || peer == NULL) { 306252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, 307252190Srpaulo &p2p->channels); 308252190Srpaulo } else if (peer->go_state == REMOTE_GO) { 309252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, 310252190Srpaulo &p2p->channels); 311252190Srpaulo } else { 312252190Srpaulo struct p2p_channels res; 313252190Srpaulo p2p_channels_intersect(&p2p->channels, &peer->channels, 314252190Srpaulo &res); 315252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, &res); 316252190Srpaulo } 317252190Srpaulo p2p_buf_add_device_info(buf, p2p, peer); 318252190Srpaulo if (peer && peer->go_state == LOCAL_GO) { 319252190Srpaulo p2p_buf_add_group_id(buf, p2p->cfg->dev_addr, p2p->ssid, 320252190Srpaulo p2p->ssid_len); 321252190Srpaulo } 322252190Srpaulo p2p_buf_update_ie_hdr(buf, len); 323252190Srpaulo 324252190Srpaulo /* WPS IE with Device Password ID attribute */ 325252190Srpaulo p2p_build_wps_ie(p2p, buf, 326252190Srpaulo p2p_wps_method_pw_id(peer ? peer->wps_method : 327252190Srpaulo WPS_NOT_READY), 0); 328252190Srpaulo 329252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 330252190Srpaulo if (p2p->wfd_ie_go_neg) 331252190Srpaulo wpabuf_put_buf(buf, p2p->wfd_ie_go_neg); 332252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 333252190Srpaulo 334252190Srpaulo 335252190Srpaulo return buf; 336252190Srpaulo} 337252190Srpaulo 338252190Srpaulo 339252190Srpaulo/** 340252190Srpaulo * p2p_reselect_channel - Re-select operating channel based on peer information 341252190Srpaulo * @p2p: P2P module context from p2p_init() 342252190Srpaulo * @intersection: Support channel list intersection from local and peer 343252190Srpaulo * 344252190Srpaulo * This function is used to re-select the best channel after having received 345252190Srpaulo * information from the peer to allow supported channel lists to be intersected. 346252190Srpaulo * This can be used to improve initial channel selection done in 347252190Srpaulo * p2p_prepare_channel() prior to the start of GO Negotiation. In addition, this 348252190Srpaulo * can be used for Invitation case. 349252190Srpaulo */ 350252190Srpaulovoid p2p_reselect_channel(struct p2p_data *p2p, 351252190Srpaulo struct p2p_channels *intersection) 352252190Srpaulo{ 353252190Srpaulo struct p2p_reg_class *cl; 354252190Srpaulo int freq; 355252190Srpaulo u8 op_reg_class, op_channel; 356252190Srpaulo unsigned int i; 357252190Srpaulo 358252190Srpaulo /* First, try to pick the best channel from another band */ 359252190Srpaulo freq = p2p_channel_to_freq(p2p->cfg->country, p2p->op_reg_class, 360252190Srpaulo p2p->op_channel); 361252190Srpaulo if (freq >= 2400 && freq < 2500 && p2p->best_freq_5 > 0 && 362252190Srpaulo p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_5, 363252190Srpaulo &op_reg_class, &op_channel) == 0 && 364252190Srpaulo p2p_channels_includes(intersection, op_reg_class, op_channel)) { 365252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Pick best 5 GHz " 366252190Srpaulo "channel (reg_class %u channel %u) from intersection", 367252190Srpaulo op_reg_class, op_channel); 368252190Srpaulo p2p->op_reg_class = op_reg_class; 369252190Srpaulo p2p->op_channel = op_channel; 370252190Srpaulo return; 371252190Srpaulo } 372252190Srpaulo 373252190Srpaulo if (freq >= 4900 && freq < 6000 && p2p->best_freq_24 > 0 && 374252190Srpaulo p2p_freq_to_channel(p2p->cfg->country, p2p->best_freq_24, 375252190Srpaulo &op_reg_class, &op_channel) == 0 && 376252190Srpaulo p2p_channels_includes(intersection, op_reg_class, op_channel)) { 377252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Pick best 2.4 GHz " 378252190Srpaulo "channel (reg_class %u channel %u) from intersection", 379252190Srpaulo op_reg_class, op_channel); 380252190Srpaulo p2p->op_reg_class = op_reg_class; 381252190Srpaulo p2p->op_channel = op_channel; 382252190Srpaulo return; 383252190Srpaulo } 384252190Srpaulo 385252190Srpaulo /* Select channel with highest preference if the peer supports it */ 386252190Srpaulo for (i = 0; p2p->cfg->pref_chan && i < p2p->cfg->num_pref_chan; i++) { 387252190Srpaulo if (p2p_channels_includes(intersection, 388252190Srpaulo p2p->cfg->pref_chan[i].op_class, 389252190Srpaulo p2p->cfg->pref_chan[i].chan)) { 390252190Srpaulo p2p->op_reg_class = p2p->cfg->pref_chan[i].op_class; 391252190Srpaulo p2p->op_channel = p2p->cfg->pref_chan[i].chan; 392252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Pick " 393252190Srpaulo "highest preferred chnnel (op_class %u " 394252190Srpaulo "channel %u) from intersection", 395252190Srpaulo p2p->op_reg_class, p2p->op_channel); 396252190Srpaulo return; 397252190Srpaulo } 398252190Srpaulo } 399252190Srpaulo 400252190Srpaulo /* Try a channel where we might be able to use HT40 */ 401252190Srpaulo for (i = 0; i < intersection->reg_classes; i++) { 402252190Srpaulo struct p2p_reg_class *c = &intersection->reg_class[i]; 403252190Srpaulo if (c->reg_class == 116 || c->reg_class == 117 || 404252190Srpaulo c->reg_class == 126 || c->reg_class == 127) { 405252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 406252190Srpaulo "P2P: Pick possible HT40 channel (reg_class " 407252190Srpaulo "%u channel %u) from intersection", 408252190Srpaulo c->reg_class, c->channel[0]); 409252190Srpaulo p2p->op_reg_class = c->reg_class; 410252190Srpaulo p2p->op_channel = c->channel[0]; 411252190Srpaulo return; 412252190Srpaulo } 413252190Srpaulo } 414252190Srpaulo 415252190Srpaulo /* 416252190Srpaulo * Try to see if the original channel is in the intersection. If 417252190Srpaulo * so, no need to change anything, as it already contains some 418252190Srpaulo * randomness. 419252190Srpaulo */ 420252190Srpaulo if (p2p_channels_includes(intersection, p2p->op_reg_class, 421252190Srpaulo p2p->op_channel)) { 422252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 423252190Srpaulo "P2P: Using original operating class and channel " 424252190Srpaulo "(op_class %u channel %u) from intersection", 425252190Srpaulo p2p->op_reg_class, p2p->op_channel); 426252190Srpaulo return; 427252190Srpaulo } 428252190Srpaulo 429252190Srpaulo /* 430252190Srpaulo * Fall back to whatever is included in the channel intersection since 431252190Srpaulo * no better options seems to be available. 432252190Srpaulo */ 433252190Srpaulo cl = &intersection->reg_class[0]; 434252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Pick another channel " 435252190Srpaulo "(reg_class %u channel %u) from intersection", 436252190Srpaulo cl->reg_class, cl->channel[0]); 437252190Srpaulo p2p->op_reg_class = cl->reg_class; 438252190Srpaulo p2p->op_channel = cl->channel[0]; 439252190Srpaulo} 440252190Srpaulo 441252190Srpaulo 442252190Srpaulostatic int p2p_go_select_channel(struct p2p_data *p2p, struct p2p_device *dev, 443252190Srpaulo u8 *status) 444252190Srpaulo{ 445252190Srpaulo struct p2p_channels intersection; 446252190Srpaulo size_t i; 447252190Srpaulo 448252190Srpaulo p2p_channels_intersect(&p2p->channels, &dev->channels, &intersection); 449252190Srpaulo if (intersection.reg_classes == 0 || 450252190Srpaulo intersection.reg_class[0].channels == 0) { 451252190Srpaulo *status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 452252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 453252190Srpaulo "P2P: No common channels found"); 454252190Srpaulo return -1; 455252190Srpaulo } 456252190Srpaulo 457252190Srpaulo for (i = 0; i < intersection.reg_classes; i++) { 458252190Srpaulo struct p2p_reg_class *c; 459252190Srpaulo c = &intersection.reg_class[i]; 460252190Srpaulo wpa_printf(MSG_DEBUG, "P2P: reg_class %u", c->reg_class); 461252190Srpaulo wpa_hexdump(MSG_DEBUG, "P2P: channels", 462252190Srpaulo c->channel, c->channels); 463252190Srpaulo } 464252190Srpaulo 465252190Srpaulo if (!p2p_channels_includes(&intersection, p2p->op_reg_class, 466252190Srpaulo p2p->op_channel)) { 467252190Srpaulo if (dev->flags & P2P_DEV_FORCE_FREQ) { 468252190Srpaulo *status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 469252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer does " 470252190Srpaulo "not support the forced channel"); 471252190Srpaulo return -1; 472252190Srpaulo } 473252190Srpaulo 474252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Selected operating " 475252190Srpaulo "channel (op_class %u channel %u) not acceptable to " 476252190Srpaulo "the peer", p2p->op_reg_class, p2p->op_channel); 477252190Srpaulo p2p_reselect_channel(p2p, &intersection); 478252190Srpaulo } else if (!(dev->flags & P2P_DEV_FORCE_FREQ) && 479252190Srpaulo !p2p->cfg->cfg_op_channel) { 480252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Try to optimize " 481252190Srpaulo "channel selection with peer information received; " 482252190Srpaulo "previously selected op_class %u channel %u", 483252190Srpaulo p2p->op_reg_class, p2p->op_channel); 484252190Srpaulo p2p_reselect_channel(p2p, &intersection); 485252190Srpaulo } 486252190Srpaulo 487252190Srpaulo if (!p2p->ssid_set) { 488252190Srpaulo p2p_build_ssid(p2p, p2p->ssid, &p2p->ssid_len); 489252190Srpaulo p2p->ssid_set = 1; 490252190Srpaulo } 491252190Srpaulo 492252190Srpaulo return 0; 493252190Srpaulo} 494252190Srpaulo 495252190Srpaulo 496252190Srpaulovoid p2p_process_go_neg_req(struct p2p_data *p2p, const u8 *sa, 497252190Srpaulo const u8 *data, size_t len, int rx_freq) 498252190Srpaulo{ 499252190Srpaulo struct p2p_device *dev = NULL; 500252190Srpaulo struct wpabuf *resp; 501252190Srpaulo struct p2p_message msg; 502252190Srpaulo u8 status = P2P_SC_FAIL_INVALID_PARAMS; 503252190Srpaulo int tie_breaker = 0; 504252190Srpaulo int freq; 505252190Srpaulo 506252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 507252190Srpaulo "P2P: Received GO Negotiation Request from " MACSTR 508252190Srpaulo "(freq=%d)", MAC2STR(sa), rx_freq); 509252190Srpaulo 510252190Srpaulo if (p2p_parse(data, len, &msg)) 511252190Srpaulo return; 512252190Srpaulo 513252190Srpaulo if (!msg.capability) { 514252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 515252190Srpaulo "P2P: Mandatory Capability attribute missing from GO " 516252190Srpaulo "Negotiation Request"); 517252190Srpaulo#ifdef CONFIG_P2P_STRICT 518252190Srpaulo goto fail; 519252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 520252190Srpaulo } 521252190Srpaulo 522252190Srpaulo if (msg.go_intent) 523252190Srpaulo tie_breaker = *msg.go_intent & 0x01; 524252190Srpaulo else { 525252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 526252190Srpaulo "P2P: Mandatory GO Intent attribute missing from GO " 527252190Srpaulo "Negotiation Request"); 528252190Srpaulo#ifdef CONFIG_P2P_STRICT 529252190Srpaulo goto fail; 530252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 531252190Srpaulo } 532252190Srpaulo 533252190Srpaulo if (!msg.config_timeout) { 534252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 535252190Srpaulo "P2P: Mandatory Configuration Timeout attribute " 536252190Srpaulo "missing from GO Negotiation Request"); 537252190Srpaulo#ifdef CONFIG_P2P_STRICT 538252190Srpaulo goto fail; 539252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 540252190Srpaulo } 541252190Srpaulo 542252190Srpaulo if (!msg.listen_channel) { 543252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 544252190Srpaulo "P2P: No Listen Channel attribute received"); 545252190Srpaulo goto fail; 546252190Srpaulo } 547252190Srpaulo if (!msg.operating_channel) { 548252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 549252190Srpaulo "P2P: No Operating Channel attribute received"); 550252190Srpaulo goto fail; 551252190Srpaulo } 552252190Srpaulo if (!msg.channel_list) { 553252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 554252190Srpaulo "P2P: No Channel List attribute received"); 555252190Srpaulo goto fail; 556252190Srpaulo } 557252190Srpaulo if (!msg.intended_addr) { 558252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 559252190Srpaulo "P2P: No Intended P2P Interface Address attribute " 560252190Srpaulo "received"); 561252190Srpaulo goto fail; 562252190Srpaulo } 563252190Srpaulo if (!msg.p2p_device_info) { 564252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 565252190Srpaulo "P2P: No P2P Device Info attribute received"); 566252190Srpaulo goto fail; 567252190Srpaulo } 568252190Srpaulo 569252190Srpaulo if (os_memcmp(msg.p2p_device_addr, sa, ETH_ALEN) != 0) { 570252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 571252190Srpaulo "P2P: Unexpected GO Negotiation Request SA=" MACSTR 572252190Srpaulo " != dev_addr=" MACSTR, 573252190Srpaulo MAC2STR(sa), MAC2STR(msg.p2p_device_addr)); 574252190Srpaulo goto fail; 575252190Srpaulo } 576252190Srpaulo 577252190Srpaulo dev = p2p_get_device(p2p, sa); 578252190Srpaulo 579252190Srpaulo if (msg.status && *msg.status) { 580252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 581252190Srpaulo "P2P: Unexpected Status attribute (%d) in GO " 582252190Srpaulo "Negotiation Request", *msg.status); 583252190Srpaulo goto fail; 584252190Srpaulo } 585252190Srpaulo 586252190Srpaulo if (dev == NULL) 587252190Srpaulo dev = p2p_add_dev_from_go_neg_req(p2p, sa, &msg); 588252190Srpaulo else if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) 589252190Srpaulo p2p_add_dev_info(p2p, sa, dev, &msg); 590252190Srpaulo if (dev && dev->flags & P2P_DEV_USER_REJECTED) { 591252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 592252190Srpaulo "P2P: User has rejected this peer"); 593252190Srpaulo status = P2P_SC_FAIL_REJECTED_BY_USER; 594252190Srpaulo } else if (dev == NULL || dev->wps_method == WPS_NOT_READY) { 595252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 596252190Srpaulo "P2P: Not ready for GO negotiation with " MACSTR, 597252190Srpaulo MAC2STR(sa)); 598252190Srpaulo status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; 599252190Srpaulo if (dev) 600252190Srpaulo dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE; 601252190Srpaulo p2p->cfg->go_neg_req_rx(p2p->cfg->cb_ctx, sa, 602252190Srpaulo msg.dev_password_id); 603252190Srpaulo } else if (p2p->go_neg_peer && p2p->go_neg_peer != dev) { 604252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 605252190Srpaulo "P2P: Already in Group Formation with another peer"); 606252190Srpaulo status = P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; 607252190Srpaulo } else { 608252190Srpaulo int go; 609252190Srpaulo 610252190Srpaulo if (!p2p->go_neg_peer) { 611252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Starting " 612252190Srpaulo "GO Negotiation with previously authorized " 613252190Srpaulo "peer"); 614252190Srpaulo if (!(dev->flags & P2P_DEV_FORCE_FREQ)) { 615252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 616252190Srpaulo "P2P: Use default channel settings"); 617252190Srpaulo p2p->op_reg_class = p2p->cfg->op_reg_class; 618252190Srpaulo p2p->op_channel = p2p->cfg->op_channel; 619252190Srpaulo os_memcpy(&p2p->channels, &p2p->cfg->channels, 620252190Srpaulo sizeof(struct p2p_channels)); 621252190Srpaulo } else { 622252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 623252190Srpaulo "P2P: Use previously configured " 624252190Srpaulo "forced channel settings"); 625252190Srpaulo } 626252190Srpaulo } 627252190Srpaulo 628252190Srpaulo dev->flags &= ~P2P_DEV_NOT_YET_READY; 629252190Srpaulo 630252190Srpaulo if (!msg.go_intent) { 631252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 632252190Srpaulo "P2P: No GO Intent attribute received"); 633252190Srpaulo goto fail; 634252190Srpaulo } 635252190Srpaulo if ((*msg.go_intent >> 1) > P2P_MAX_GO_INTENT) { 636252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 637252190Srpaulo "P2P: Invalid GO Intent value (%u) received", 638252190Srpaulo *msg.go_intent >> 1); 639252190Srpaulo goto fail; 640252190Srpaulo } 641252190Srpaulo 642252190Srpaulo if (dev->go_neg_req_sent && 643252190Srpaulo os_memcmp(sa, p2p->cfg->dev_addr, ETH_ALEN) > 0) { 644252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 645252190Srpaulo "P2P: Do not reply since peer has higher " 646252190Srpaulo "address and GO Neg Request already sent"); 647252190Srpaulo p2p_parse_free(&msg); 648252190Srpaulo return; 649252190Srpaulo } 650252190Srpaulo 651252190Srpaulo go = p2p_go_det(p2p->go_intent, *msg.go_intent); 652252190Srpaulo if (go < 0) { 653252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 654252190Srpaulo "P2P: Incompatible GO Intent"); 655252190Srpaulo status = P2P_SC_FAIL_BOTH_GO_INTENT_15; 656252190Srpaulo goto fail; 657252190Srpaulo } 658252190Srpaulo 659252190Srpaulo if (p2p_peer_channels(p2p, dev, msg.channel_list, 660252190Srpaulo msg.channel_list_len) < 0) { 661252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 662252190Srpaulo "P2P: No common channels found"); 663252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 664252190Srpaulo goto fail; 665252190Srpaulo } 666252190Srpaulo 667252190Srpaulo switch (msg.dev_password_id) { 668252190Srpaulo case DEV_PW_REGISTRAR_SPECIFIED: 669252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 670252190Srpaulo "P2P: PIN from peer Display"); 671252190Srpaulo if (dev->wps_method != WPS_PIN_KEYPAD) { 672252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 673252190Srpaulo "P2P: We have wps_method=%s -> " 674252190Srpaulo "incompatible", 675252190Srpaulo p2p_wps_method_str(dev->wps_method)); 676252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 677252190Srpaulo goto fail; 678252190Srpaulo } 679252190Srpaulo break; 680252190Srpaulo case DEV_PW_USER_SPECIFIED: 681252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 682252190Srpaulo "P2P: Peer entered PIN on Keypad"); 683252190Srpaulo if (dev->wps_method != WPS_PIN_DISPLAY) { 684252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 685252190Srpaulo "P2P: We have wps_method=%s -> " 686252190Srpaulo "incompatible", 687252190Srpaulo p2p_wps_method_str(dev->wps_method)); 688252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 689252190Srpaulo goto fail; 690252190Srpaulo } 691252190Srpaulo break; 692252190Srpaulo case DEV_PW_PUSHBUTTON: 693252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 694252190Srpaulo "P2P: Peer using pushbutton"); 695252190Srpaulo if (dev->wps_method != WPS_PBC) { 696252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 697252190Srpaulo "P2P: We have wps_method=%s -> " 698252190Srpaulo "incompatible", 699252190Srpaulo p2p_wps_method_str(dev->wps_method)); 700252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 701252190Srpaulo goto fail; 702252190Srpaulo } 703252190Srpaulo break; 704252190Srpaulo default: 705252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 706252190Srpaulo "P2P: Unsupported Device Password ID %d", 707252190Srpaulo msg.dev_password_id); 708252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 709252190Srpaulo goto fail; 710252190Srpaulo } 711252190Srpaulo 712252190Srpaulo if (go && p2p_go_select_channel(p2p, dev, &status) < 0) 713252190Srpaulo goto fail; 714252190Srpaulo 715252190Srpaulo dev->go_state = go ? LOCAL_GO : REMOTE_GO; 716252190Srpaulo dev->oper_freq = p2p_channel_to_freq((const char *) 717252190Srpaulo msg.operating_channel, 718252190Srpaulo msg.operating_channel[3], 719252190Srpaulo msg.operating_channel[4]); 720252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer operating " 721252190Srpaulo "channel preference: %d MHz", dev->oper_freq); 722252190Srpaulo 723252190Srpaulo if (msg.config_timeout) { 724252190Srpaulo dev->go_timeout = msg.config_timeout[0]; 725252190Srpaulo dev->client_timeout = msg.config_timeout[1]; 726252190Srpaulo } 727252190Srpaulo 728252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 729252190Srpaulo "P2P: GO Negotiation with " MACSTR, MAC2STR(sa)); 730252190Srpaulo if (p2p->state != P2P_IDLE) 731252190Srpaulo p2p_stop_find_for_freq(p2p, rx_freq); 732252190Srpaulo p2p_set_state(p2p, P2P_GO_NEG); 733252190Srpaulo p2p_clear_timeout(p2p); 734252190Srpaulo dev->dialog_token = msg.dialog_token; 735252190Srpaulo os_memcpy(dev->intended_addr, msg.intended_addr, ETH_ALEN); 736252190Srpaulo p2p->go_neg_peer = dev; 737252190Srpaulo status = P2P_SC_SUCCESS; 738252190Srpaulo } 739252190Srpaulo 740252190Srpaulofail: 741252190Srpaulo if (dev) 742252190Srpaulo dev->status = status; 743252190Srpaulo resp = p2p_build_go_neg_resp(p2p, dev, msg.dialog_token, status, 744252190Srpaulo !tie_breaker); 745252190Srpaulo p2p_parse_free(&msg); 746252190Srpaulo if (resp == NULL) 747252190Srpaulo return; 748252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 749252190Srpaulo "P2P: Sending GO Negotiation Response"); 750252190Srpaulo if (rx_freq > 0) 751252190Srpaulo freq = rx_freq; 752252190Srpaulo else 753252190Srpaulo freq = p2p_channel_to_freq(p2p->cfg->country, 754252190Srpaulo p2p->cfg->reg_class, 755252190Srpaulo p2p->cfg->channel); 756252190Srpaulo if (freq < 0) { 757252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 758252190Srpaulo "P2P: Unknown regulatory class/channel"); 759252190Srpaulo wpabuf_free(resp); 760252190Srpaulo return; 761252190Srpaulo } 762252190Srpaulo if (status == P2P_SC_SUCCESS) { 763252190Srpaulo p2p->pending_action_state = P2P_PENDING_GO_NEG_RESPONSE; 764252190Srpaulo dev->flags |= P2P_DEV_WAIT_GO_NEG_CONFIRM; 765252190Srpaulo if (os_memcmp(sa, p2p->cfg->dev_addr, ETH_ALEN) < 0) { 766252190Srpaulo /* 767252190Srpaulo * Peer has smaller address, so the GO Negotiation 768252190Srpaulo * Response from us is expected to complete 769252190Srpaulo * negotiation. Ignore a GO Negotiation Response from 770252190Srpaulo * the peer if it happens to be received after this 771252190Srpaulo * point due to a race condition in GO Negotiation 772252190Srpaulo * Request transmission and processing. 773252190Srpaulo */ 774252190Srpaulo dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 775252190Srpaulo } 776252190Srpaulo } else 777252190Srpaulo p2p->pending_action_state = 778252190Srpaulo P2P_PENDING_GO_NEG_RESPONSE_FAILURE; 779252190Srpaulo if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, 780252190Srpaulo p2p->cfg->dev_addr, 781252190Srpaulo wpabuf_head(resp), wpabuf_len(resp), 250) < 0) { 782252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 783252190Srpaulo "P2P: Failed to send Action frame"); 784252190Srpaulo } 785252190Srpaulo 786252190Srpaulo wpabuf_free(resp); 787252190Srpaulo} 788252190Srpaulo 789252190Srpaulo 790252190Srpaulostatic struct wpabuf * p2p_build_go_neg_conf(struct p2p_data *p2p, 791252190Srpaulo struct p2p_device *peer, 792252190Srpaulo u8 dialog_token, u8 status, 793252190Srpaulo const u8 *resp_chan, int go) 794252190Srpaulo{ 795252190Srpaulo struct wpabuf *buf; 796252190Srpaulo u8 *len; 797252190Srpaulo struct p2p_channels res; 798252190Srpaulo u8 group_capab; 799252190Srpaulo size_t extra = 0; 800252190Srpaulo 801252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 802252190Srpaulo "P2P: Building GO Negotiation Confirm"); 803252190Srpaulo 804252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 805252190Srpaulo if (p2p->wfd_ie_go_neg) 806252190Srpaulo extra = wpabuf_len(p2p->wfd_ie_go_neg); 807252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 808252190Srpaulo 809252190Srpaulo buf = wpabuf_alloc(1000 + extra); 810252190Srpaulo if (buf == NULL) 811252190Srpaulo return NULL; 812252190Srpaulo 813252190Srpaulo p2p_buf_add_public_action_hdr(buf, P2P_GO_NEG_CONF, dialog_token); 814252190Srpaulo 815252190Srpaulo len = p2p_buf_add_ie_hdr(buf); 816252190Srpaulo p2p_buf_add_status(buf, status); 817252190Srpaulo group_capab = 0; 818252190Srpaulo if (peer->go_state == LOCAL_GO) { 819252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) { 820252190Srpaulo group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP; 821252190Srpaulo if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN) 822252190Srpaulo group_capab |= 823252190Srpaulo P2P_GROUP_CAPAB_PERSISTENT_RECONN; 824252190Srpaulo } 825252190Srpaulo if (p2p->cross_connect) 826252190Srpaulo group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; 827252190Srpaulo if (p2p->cfg->p2p_intra_bss) 828252190Srpaulo group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST; 829252190Srpaulo } 830252190Srpaulo p2p_buf_add_capability(buf, p2p->dev_capab & 831252190Srpaulo ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 832252190Srpaulo group_capab); 833252190Srpaulo if (go || resp_chan == NULL) 834252190Srpaulo p2p_buf_add_operating_channel(buf, p2p->cfg->country, 835252190Srpaulo p2p->op_reg_class, 836252190Srpaulo p2p->op_channel); 837252190Srpaulo else 838252190Srpaulo p2p_buf_add_operating_channel(buf, (const char *) resp_chan, 839252190Srpaulo resp_chan[3], resp_chan[4]); 840252190Srpaulo p2p_channels_intersect(&p2p->channels, &peer->channels, &res); 841252190Srpaulo p2p_buf_add_channel_list(buf, p2p->cfg->country, &res); 842252190Srpaulo if (go) { 843252190Srpaulo p2p_buf_add_group_id(buf, p2p->cfg->dev_addr, p2p->ssid, 844252190Srpaulo p2p->ssid_len); 845252190Srpaulo } 846252190Srpaulo p2p_buf_update_ie_hdr(buf, len); 847252190Srpaulo 848252190Srpaulo#ifdef CONFIG_WIFI_DISPLAY 849252190Srpaulo if (p2p->wfd_ie_go_neg) 850252190Srpaulo wpabuf_put_buf(buf, p2p->wfd_ie_go_neg); 851252190Srpaulo#endif /* CONFIG_WIFI_DISPLAY */ 852252190Srpaulo 853252190Srpaulo return buf; 854252190Srpaulo} 855252190Srpaulo 856252190Srpaulo 857252190Srpaulovoid p2p_process_go_neg_resp(struct p2p_data *p2p, const u8 *sa, 858252190Srpaulo const u8 *data, size_t len, int rx_freq) 859252190Srpaulo{ 860252190Srpaulo struct p2p_device *dev; 861252190Srpaulo struct wpabuf *conf; 862252190Srpaulo int go = -1; 863252190Srpaulo struct p2p_message msg; 864252190Srpaulo u8 status = P2P_SC_SUCCESS; 865252190Srpaulo int freq; 866252190Srpaulo 867252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 868252190Srpaulo "P2P: Received GO Negotiation Response from " MACSTR 869252190Srpaulo " (freq=%d)", MAC2STR(sa), rx_freq); 870252190Srpaulo dev = p2p_get_device(p2p, sa); 871252190Srpaulo if (dev == NULL || dev->wps_method == WPS_NOT_READY || 872252190Srpaulo dev != p2p->go_neg_peer) { 873252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 874252190Srpaulo "P2P: Not ready for GO negotiation with " MACSTR, 875252190Srpaulo MAC2STR(sa)); 876252190Srpaulo return; 877252190Srpaulo } 878252190Srpaulo 879252190Srpaulo if (p2p_parse(data, len, &msg)) 880252190Srpaulo return; 881252190Srpaulo 882252190Srpaulo if (!(dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE)) { 883252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 884252190Srpaulo "P2P: Was not expecting GO Negotiation Response - " 885252190Srpaulo "ignore"); 886252190Srpaulo p2p_parse_free(&msg); 887252190Srpaulo return; 888252190Srpaulo } 889252190Srpaulo dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE; 890252190Srpaulo 891252190Srpaulo if (msg.dialog_token != dev->dialog_token) { 892252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 893252190Srpaulo "P2P: Unexpected Dialog Token %u (expected %u)", 894252190Srpaulo msg.dialog_token, dev->dialog_token); 895252190Srpaulo p2p_parse_free(&msg); 896252190Srpaulo return; 897252190Srpaulo } 898252190Srpaulo 899252190Srpaulo if (!msg.status) { 900252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 901252190Srpaulo "P2P: No Status attribute received"); 902252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 903252190Srpaulo goto fail; 904252190Srpaulo } 905252190Srpaulo if (*msg.status) { 906252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 907252190Srpaulo "P2P: GO Negotiation rejected: status %d", 908252190Srpaulo *msg.status); 909252190Srpaulo dev->go_neg_req_sent = 0; 910252190Srpaulo if (*msg.status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) { 911252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 912252190Srpaulo "P2P: Wait for the peer to become ready for " 913252190Srpaulo "GO Negotiation"); 914252190Srpaulo dev->flags |= P2P_DEV_NOT_YET_READY; 915252190Srpaulo dev->wait_count = 0; 916252190Srpaulo p2p_set_state(p2p, P2P_WAIT_PEER_IDLE); 917252190Srpaulo p2p_set_timeout(p2p, 0, 0); 918252190Srpaulo } else { 919252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 920252190Srpaulo "P2P: Stop GO Negotiation attempt"); 921252190Srpaulo p2p_go_neg_failed(p2p, dev, *msg.status); 922252190Srpaulo } 923252190Srpaulo p2p->cfg->send_action_done(p2p->cfg->cb_ctx); 924252190Srpaulo p2p_parse_free(&msg); 925252190Srpaulo return; 926252190Srpaulo } 927252190Srpaulo 928252190Srpaulo if (!msg.capability) { 929252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 930252190Srpaulo "P2P: Mandatory Capability attribute missing from GO " 931252190Srpaulo "Negotiation Response"); 932252190Srpaulo#ifdef CONFIG_P2P_STRICT 933252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 934252190Srpaulo goto fail; 935252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 936252190Srpaulo } 937252190Srpaulo 938252190Srpaulo if (!msg.p2p_device_info) { 939252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 940252190Srpaulo "P2P: Mandatory P2P Device Info attribute missing " 941252190Srpaulo "from GO Negotiation Response"); 942252190Srpaulo#ifdef CONFIG_P2P_STRICT 943252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 944252190Srpaulo goto fail; 945252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 946252190Srpaulo } 947252190Srpaulo 948252190Srpaulo if (!msg.intended_addr) { 949252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 950252190Srpaulo "P2P: No Intended P2P Interface Address attribute " 951252190Srpaulo "received"); 952252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 953252190Srpaulo goto fail; 954252190Srpaulo } 955252190Srpaulo 956252190Srpaulo if (!msg.go_intent) { 957252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 958252190Srpaulo "P2P: No GO Intent attribute received"); 959252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 960252190Srpaulo goto fail; 961252190Srpaulo } 962252190Srpaulo if ((*msg.go_intent >> 1) > P2P_MAX_GO_INTENT) { 963252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 964252190Srpaulo "P2P: Invalid GO Intent value (%u) received", 965252190Srpaulo *msg.go_intent >> 1); 966252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 967252190Srpaulo goto fail; 968252190Srpaulo } 969252190Srpaulo 970252190Srpaulo go = p2p_go_det(p2p->go_intent, *msg.go_intent); 971252190Srpaulo if (go < 0) { 972252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 973252190Srpaulo "P2P: Incompatible GO Intent"); 974252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PARAMS; 975252190Srpaulo goto fail; 976252190Srpaulo } 977252190Srpaulo 978252190Srpaulo if (!go && msg.group_id) { 979252190Srpaulo /* Store SSID for Provisioning step */ 980252190Srpaulo p2p->ssid_len = msg.group_id_len - ETH_ALEN; 981252190Srpaulo os_memcpy(p2p->ssid, msg.group_id + ETH_ALEN, p2p->ssid_len); 982252190Srpaulo } else if (!go) { 983252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 984252190Srpaulo "P2P: Mandatory P2P Group ID attribute missing from " 985252190Srpaulo "GO Negotiation Response"); 986252190Srpaulo p2p->ssid_len = 0; 987252190Srpaulo#ifdef CONFIG_P2P_STRICT 988252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 989252190Srpaulo goto fail; 990252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 991252190Srpaulo } 992252190Srpaulo 993252190Srpaulo if (!msg.config_timeout) { 994252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 995252190Srpaulo "P2P: Mandatory Configuration Timeout attribute " 996252190Srpaulo "missing from GO Negotiation Response"); 997252190Srpaulo#ifdef CONFIG_P2P_STRICT 998252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 999252190Srpaulo goto fail; 1000252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 1001252190Srpaulo } else { 1002252190Srpaulo dev->go_timeout = msg.config_timeout[0]; 1003252190Srpaulo dev->client_timeout = msg.config_timeout[1]; 1004252190Srpaulo } 1005252190Srpaulo 1006252190Srpaulo if (!msg.operating_channel && !go) { 1007252190Srpaulo /* 1008252190Srpaulo * Note: P2P Client may omit Operating Channel attribute to 1009252190Srpaulo * indicate it does not have a preference. 1010252190Srpaulo */ 1011252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1012252190Srpaulo "P2P: No Operating Channel attribute received"); 1013252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 1014252190Srpaulo goto fail; 1015252190Srpaulo } 1016252190Srpaulo if (!msg.channel_list) { 1017252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1018252190Srpaulo "P2P: No Channel List attribute received"); 1019252190Srpaulo status = P2P_SC_FAIL_INVALID_PARAMS; 1020252190Srpaulo goto fail; 1021252190Srpaulo } 1022252190Srpaulo 1023252190Srpaulo if (p2p_peer_channels(p2p, dev, msg.channel_list, 1024252190Srpaulo msg.channel_list_len) < 0) { 1025252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1026252190Srpaulo "P2P: No common channels found"); 1027252190Srpaulo status = P2P_SC_FAIL_NO_COMMON_CHANNELS; 1028252190Srpaulo goto fail; 1029252190Srpaulo } 1030252190Srpaulo 1031252190Srpaulo if (msg.operating_channel) { 1032252190Srpaulo dev->oper_freq = p2p_channel_to_freq((const char *) 1033252190Srpaulo msg.operating_channel, 1034252190Srpaulo msg.operating_channel[3], 1035252190Srpaulo msg.operating_channel[4]); 1036252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer operating " 1037252190Srpaulo "channel preference: %d MHz", dev->oper_freq); 1038252190Srpaulo } else 1039252190Srpaulo dev->oper_freq = 0; 1040252190Srpaulo 1041252190Srpaulo switch (msg.dev_password_id) { 1042252190Srpaulo case DEV_PW_REGISTRAR_SPECIFIED: 1043252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1044252190Srpaulo "P2P: PIN from peer Display"); 1045252190Srpaulo if (dev->wps_method != WPS_PIN_KEYPAD) { 1046252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1047252190Srpaulo "P2P: We have wps_method=%s -> " 1048252190Srpaulo "incompatible", 1049252190Srpaulo p2p_wps_method_str(dev->wps_method)); 1050252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 1051252190Srpaulo goto fail; 1052252190Srpaulo } 1053252190Srpaulo break; 1054252190Srpaulo case DEV_PW_USER_SPECIFIED: 1055252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1056252190Srpaulo "P2P: Peer entered PIN on Keypad"); 1057252190Srpaulo if (dev->wps_method != WPS_PIN_DISPLAY) { 1058252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1059252190Srpaulo "P2P: We have wps_method=%s -> " 1060252190Srpaulo "incompatible", 1061252190Srpaulo p2p_wps_method_str(dev->wps_method)); 1062252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 1063252190Srpaulo goto fail; 1064252190Srpaulo } 1065252190Srpaulo break; 1066252190Srpaulo case DEV_PW_PUSHBUTTON: 1067252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1068252190Srpaulo "P2P: Peer using pushbutton"); 1069252190Srpaulo if (dev->wps_method != WPS_PBC) { 1070252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1071252190Srpaulo "P2P: We have wps_method=%s -> " 1072252190Srpaulo "incompatible", 1073252190Srpaulo p2p_wps_method_str(dev->wps_method)); 1074252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 1075252190Srpaulo goto fail; 1076252190Srpaulo } 1077252190Srpaulo break; 1078252190Srpaulo default: 1079252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1080252190Srpaulo "P2P: Unsupported Device Password ID %d", 1081252190Srpaulo msg.dev_password_id); 1082252190Srpaulo status = P2P_SC_FAIL_INCOMPATIBLE_PROV_METHOD; 1083252190Srpaulo goto fail; 1084252190Srpaulo } 1085252190Srpaulo 1086252190Srpaulo if (go && p2p_go_select_channel(p2p, dev, &status) < 0) 1087252190Srpaulo goto fail; 1088252190Srpaulo 1089252190Srpaulo p2p_set_state(p2p, P2P_GO_NEG); 1090252190Srpaulo p2p_clear_timeout(p2p); 1091252190Srpaulo 1092252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1093252190Srpaulo "P2P: GO Negotiation with " MACSTR, MAC2STR(sa)); 1094252190Srpaulo os_memcpy(dev->intended_addr, msg.intended_addr, ETH_ALEN); 1095252190Srpaulo 1096252190Srpaulofail: 1097252190Srpaulo conf = p2p_build_go_neg_conf(p2p, dev, msg.dialog_token, status, 1098252190Srpaulo msg.operating_channel, go); 1099252190Srpaulo p2p_parse_free(&msg); 1100252190Srpaulo if (conf == NULL) 1101252190Srpaulo return; 1102252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1103252190Srpaulo "P2P: Sending GO Negotiation Confirm"); 1104252190Srpaulo if (status == P2P_SC_SUCCESS) { 1105252190Srpaulo p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM; 1106252190Srpaulo dev->go_state = go ? LOCAL_GO : REMOTE_GO; 1107252190Srpaulo } else 1108252190Srpaulo p2p->pending_action_state = P2P_NO_PENDING_ACTION; 1109252190Srpaulo if (rx_freq > 0) 1110252190Srpaulo freq = rx_freq; 1111252190Srpaulo else 1112252190Srpaulo freq = dev->listen_freq; 1113252190Srpaulo if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr, sa, 1114252190Srpaulo wpabuf_head(conf), wpabuf_len(conf), 0) < 0) { 1115252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1116252190Srpaulo "P2P: Failed to send Action frame"); 1117252190Srpaulo p2p_go_neg_failed(p2p, dev, -1); 1118252190Srpaulo } 1119252190Srpaulo wpabuf_free(conf); 1120252190Srpaulo} 1121252190Srpaulo 1122252190Srpaulo 1123252190Srpaulovoid p2p_process_go_neg_conf(struct p2p_data *p2p, const u8 *sa, 1124252190Srpaulo const u8 *data, size_t len) 1125252190Srpaulo{ 1126252190Srpaulo struct p2p_device *dev; 1127252190Srpaulo struct p2p_message msg; 1128252190Srpaulo 1129252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1130252190Srpaulo "P2P: Received GO Negotiation Confirm from " MACSTR, 1131252190Srpaulo MAC2STR(sa)); 1132252190Srpaulo dev = p2p_get_device(p2p, sa); 1133252190Srpaulo if (dev == NULL || dev->wps_method == WPS_NOT_READY || 1134252190Srpaulo dev != p2p->go_neg_peer) { 1135252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1136252190Srpaulo "P2P: Not ready for GO negotiation with " MACSTR, 1137252190Srpaulo MAC2STR(sa)); 1138252190Srpaulo return; 1139252190Srpaulo } 1140252190Srpaulo 1141252190Srpaulo if (p2p->pending_action_state == P2P_PENDING_GO_NEG_RESPONSE) { 1142252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Stopped waiting " 1143252190Srpaulo "for TX status on GO Negotiation Response since we " 1144252190Srpaulo "already received Confirmation"); 1145252190Srpaulo p2p->pending_action_state = P2P_NO_PENDING_ACTION; 1146252190Srpaulo } 1147252190Srpaulo 1148252190Srpaulo if (p2p_parse(data, len, &msg)) 1149252190Srpaulo return; 1150252190Srpaulo 1151252190Srpaulo if (!(dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) { 1152252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1153252190Srpaulo "P2P: Was not expecting GO Negotiation Confirm - " 1154252190Srpaulo "ignore"); 1155252190Srpaulo return; 1156252190Srpaulo } 1157252190Srpaulo dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM; 1158252190Srpaulo 1159252190Srpaulo if (msg.dialog_token != dev->dialog_token) { 1160252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1161252190Srpaulo "P2P: Unexpected Dialog Token %u (expected %u)", 1162252190Srpaulo msg.dialog_token, dev->dialog_token); 1163252190Srpaulo p2p_parse_free(&msg); 1164252190Srpaulo return; 1165252190Srpaulo } 1166252190Srpaulo 1167252190Srpaulo if (!msg.status) { 1168252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1169252190Srpaulo "P2P: No Status attribute received"); 1170252190Srpaulo p2p_parse_free(&msg); 1171252190Srpaulo return; 1172252190Srpaulo } 1173252190Srpaulo if (*msg.status) { 1174252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1175252190Srpaulo "P2P: GO Negotiation rejected: status %d", 1176252190Srpaulo *msg.status); 1177252190Srpaulo p2p_parse_free(&msg); 1178252190Srpaulo return; 1179252190Srpaulo } 1180252190Srpaulo 1181252190Srpaulo if (dev->go_state == REMOTE_GO && msg.group_id) { 1182252190Srpaulo /* Store SSID for Provisioning step */ 1183252190Srpaulo p2p->ssid_len = msg.group_id_len - ETH_ALEN; 1184252190Srpaulo os_memcpy(p2p->ssid, msg.group_id + ETH_ALEN, p2p->ssid_len); 1185252190Srpaulo } else if (dev->go_state == REMOTE_GO) { 1186252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1187252190Srpaulo "P2P: Mandatory P2P Group ID attribute missing from " 1188252190Srpaulo "GO Negotiation Confirmation"); 1189252190Srpaulo p2p->ssid_len = 0; 1190252190Srpaulo#ifdef CONFIG_P2P_STRICT 1191252190Srpaulo p2p_parse_free(&msg); 1192252190Srpaulo return; 1193252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 1194252190Srpaulo } 1195252190Srpaulo 1196252190Srpaulo if (!msg.operating_channel) { 1197252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1198252190Srpaulo "P2P: Mandatory Operating Channel attribute missing " 1199252190Srpaulo "from GO Negotiation Confirmation"); 1200252190Srpaulo#ifdef CONFIG_P2P_STRICT 1201252190Srpaulo p2p_parse_free(&msg); 1202252190Srpaulo return; 1203252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 1204252190Srpaulo } 1205252190Srpaulo 1206252190Srpaulo if (!msg.channel_list) { 1207252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1208252190Srpaulo "P2P: Mandatory Operating Channel attribute missing " 1209252190Srpaulo "from GO Negotiation Confirmation"); 1210252190Srpaulo#ifdef CONFIG_P2P_STRICT 1211252190Srpaulo p2p_parse_free(&msg); 1212252190Srpaulo return; 1213252190Srpaulo#endif /* CONFIG_P2P_STRICT */ 1214252190Srpaulo } 1215252190Srpaulo 1216252190Srpaulo p2p_parse_free(&msg); 1217252190Srpaulo 1218252190Srpaulo if (dev->go_state == UNKNOWN_GO) { 1219252190Srpaulo /* 1220252190Srpaulo * This should not happen since GO negotiation has already 1221252190Srpaulo * been completed. 1222252190Srpaulo */ 1223252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, 1224252190Srpaulo "P2P: Unexpected GO Neg state - do not know which end " 1225252190Srpaulo "becomes GO"); 1226252190Srpaulo return; 1227252190Srpaulo } 1228252190Srpaulo 1229252190Srpaulo /* 1230252190Srpaulo * The peer could have missed our ctrl::ack frame for GO Negotiation 1231252190Srpaulo * Confirm and continue retransmitting the frame. To reduce the 1232252190Srpaulo * likelihood of the peer not getting successful TX status for the 1233252190Srpaulo * GO Negotiation Confirm frame, wait a short time here before starting 1234252190Srpaulo * the group so that we will remain on the current channel to 1235252190Srpaulo * acknowledge any possible retransmission from the peer. 1236252190Srpaulo */ 1237252190Srpaulo wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: 20 ms wait on current " 1238252190Srpaulo "channel before starting group"); 1239252190Srpaulo os_sleep(0, 20000); 1240252190Srpaulo 1241252190Srpaulo p2p_go_complete(p2p, dev); 1242252190Srpaulo} 1243