Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Wi-Fi Direct - P2P service discovery |
| 3 | * Copyright (c) 2009, Atheros Communications |
| 4 | * |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include "includes.h" |
| 10 | |
| 11 | #include "common.h" |
| 12 | #include "common/ieee802_11_defs.h" |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 13 | #include "common/gas.h" |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 14 | #include "p2p_i.h" |
| 15 | #include "p2p.h" |
| 16 | |
| 17 | |
| 18 | struct p2p_sd_query * p2p_pending_sd_req(struct p2p_data *p2p, |
| 19 | struct p2p_device *dev) |
| 20 | { |
| 21 | struct p2p_sd_query *q; |
| 22 | |
| 23 | if (!(dev->info.dev_capab & P2P_DEV_CAPAB_SERVICE_DISCOVERY)) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 24 | return NULL; /* peer does not support SD */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 25 | |
| 26 | for (q = p2p->sd_queries; q; q = q->next) { |
| 27 | if (q->for_all_peers && !(dev->flags & P2P_DEV_SD_INFO)) |
| 28 | return q; |
| 29 | if (!q->for_all_peers && |
| 30 | os_memcmp(q->peer, dev->info.p2p_device_addr, ETH_ALEN) == |
| 31 | 0) |
| 32 | return q; |
| 33 | } |
| 34 | |
| 35 | return NULL; |
| 36 | } |
| 37 | |
| 38 | |
| 39 | static int p2p_unlink_sd_query(struct p2p_data *p2p, |
| 40 | struct p2p_sd_query *query) |
| 41 | { |
| 42 | struct p2p_sd_query *q, *prev; |
| 43 | q = p2p->sd_queries; |
| 44 | prev = NULL; |
| 45 | while (q) { |
| 46 | if (q == query) { |
| 47 | if (prev) |
| 48 | prev->next = q->next; |
| 49 | else |
| 50 | p2p->sd_queries = q->next; |
| 51 | if (p2p->sd_query == query) |
| 52 | p2p->sd_query = NULL; |
| 53 | return 1; |
| 54 | } |
| 55 | prev = q; |
| 56 | q = q->next; |
| 57 | } |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | |
| 62 | static void p2p_free_sd_query(struct p2p_sd_query *q) |
| 63 | { |
| 64 | if (q == NULL) |
| 65 | return; |
| 66 | wpabuf_free(q->tlvs); |
| 67 | os_free(q); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | void p2p_free_sd_queries(struct p2p_data *p2p) |
| 72 | { |
| 73 | struct p2p_sd_query *q, *prev; |
| 74 | q = p2p->sd_queries; |
| 75 | p2p->sd_queries = NULL; |
| 76 | while (q) { |
| 77 | prev = q; |
| 78 | q = q->next; |
| 79 | p2p_free_sd_query(prev); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | |
| 84 | static struct wpabuf * p2p_build_sd_query(u16 update_indic, |
| 85 | struct wpabuf *tlvs) |
| 86 | { |
| 87 | struct wpabuf *buf; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 88 | u8 *len_pos; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 89 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 90 | buf = gas_anqp_build_initial_req(0, 100 + wpabuf_len(tlvs)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 91 | if (buf == NULL) |
| 92 | return NULL; |
| 93 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 94 | /* ANQP Query Request Frame */ |
| 95 | len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 96 | wpabuf_put_be24(buf, OUI_WFA); |
| 97 | wpabuf_put_u8(buf, P2P_OUI_TYPE); |
| 98 | wpabuf_put_le16(buf, update_indic); /* Service Update Indicator */ |
| 99 | wpabuf_put_buf(buf, tlvs); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 100 | gas_anqp_set_element_len(buf, len_pos); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 101 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 102 | gas_anqp_set_len(buf); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 103 | |
| 104 | return buf; |
| 105 | } |
| 106 | |
| 107 | |
| 108 | static void p2p_send_gas_comeback_req(struct p2p_data *p2p, const u8 *dst, |
| 109 | u8 dialog_token, int freq) |
| 110 | { |
| 111 | struct wpabuf *req; |
| 112 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 113 | req = gas_build_comeback_req(dialog_token); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 114 | if (req == NULL) |
| 115 | return; |
| 116 | |
| 117 | p2p->pending_action_state = P2P_NO_PENDING_ACTION; |
| 118 | if (p2p_send_action(p2p, freq, dst, p2p->cfg->dev_addr, dst, |
| 119 | wpabuf_head(req), wpabuf_len(req), 200) < 0) |
| 120 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 121 | "P2P: Failed to send Action frame"); |
| 122 | |
| 123 | wpabuf_free(req); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | static struct wpabuf * p2p_build_sd_response(u8 dialog_token, u16 status_code, |
| 128 | u16 comeback_delay, |
| 129 | u16 update_indic, |
| 130 | const struct wpabuf *tlvs) |
| 131 | { |
| 132 | struct wpabuf *buf; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 133 | u8 *len_pos; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 134 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 135 | buf = gas_anqp_build_initial_resp(dialog_token, status_code, |
| 136 | comeback_delay, |
| 137 | 100 + (tlvs ? wpabuf_len(tlvs) : 0)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 138 | if (buf == NULL) |
| 139 | return NULL; |
| 140 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 141 | if (tlvs) { |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 142 | /* ANQP Query Response Frame */ |
| 143 | len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 144 | wpabuf_put_be24(buf, OUI_WFA); |
| 145 | wpabuf_put_u8(buf, P2P_OUI_TYPE); |
| 146 | /* Service Update Indicator */ |
| 147 | wpabuf_put_le16(buf, update_indic); |
| 148 | wpabuf_put_buf(buf, tlvs); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 149 | gas_anqp_set_element_len(buf, len_pos); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 150 | } |
| 151 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 152 | gas_anqp_set_len(buf); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 153 | |
| 154 | return buf; |
| 155 | } |
| 156 | |
| 157 | |
| 158 | static struct wpabuf * p2p_build_gas_comeback_resp(u8 dialog_token, |
| 159 | u16 status_code, |
| 160 | u16 update_indic, |
| 161 | const u8 *data, size_t len, |
| 162 | u8 frag_id, u8 more, |
| 163 | u16 total_len) |
| 164 | { |
| 165 | struct wpabuf *buf; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 166 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 167 | buf = gas_anqp_build_comeback_resp(dialog_token, status_code, frag_id, |
| 168 | more, 0, 100 + len); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 169 | if (buf == NULL) |
| 170 | return NULL; |
| 171 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 172 | if (frag_id == 0) { |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 173 | /* ANQP Query Response Frame */ |
| 174 | wpabuf_put_le16(buf, ANQP_VENDOR_SPECIFIC); /* Info ID */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 175 | wpabuf_put_le16(buf, 3 + 1 + 2 + total_len); |
| 176 | wpabuf_put_be24(buf, OUI_WFA); |
| 177 | wpabuf_put_u8(buf, P2P_OUI_TYPE); |
| 178 | /* Service Update Indicator */ |
| 179 | wpabuf_put_le16(buf, update_indic); |
| 180 | } |
| 181 | |
| 182 | wpabuf_put_data(buf, data, len); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 183 | gas_anqp_set_len(buf); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 184 | |
| 185 | return buf; |
| 186 | } |
| 187 | |
| 188 | |
| 189 | int p2p_start_sd(struct p2p_data *p2p, struct p2p_device *dev) |
| 190 | { |
| 191 | struct wpabuf *req; |
| 192 | int ret = 0; |
| 193 | struct p2p_sd_query *query; |
| 194 | int freq; |
| 195 | |
| 196 | freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq; |
| 197 | if (freq <= 0) { |
| 198 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 199 | "P2P: No Listen/Operating frequency known for the " |
| 200 | "peer " MACSTR " to send SD Request", |
| 201 | MAC2STR(dev->info.p2p_device_addr)); |
| 202 | return -1; |
| 203 | } |
| 204 | |
| 205 | query = p2p_pending_sd_req(p2p, dev); |
| 206 | if (query == NULL) |
| 207 | return -1; |
| 208 | |
| 209 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 210 | "P2P: Start Service Discovery with " MACSTR, |
| 211 | MAC2STR(dev->info.p2p_device_addr)); |
| 212 | |
| 213 | req = p2p_build_sd_query(p2p->srv_update_indic, query->tlvs); |
| 214 | if (req == NULL) |
| 215 | return -1; |
| 216 | |
| 217 | p2p->sd_peer = dev; |
| 218 | p2p->sd_query = query; |
| 219 | p2p->pending_action_state = P2P_PENDING_SD; |
| 220 | |
| 221 | if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr, |
| 222 | p2p->cfg->dev_addr, dev->info.p2p_device_addr, |
| 223 | wpabuf_head(req), wpabuf_len(req), 5000) < 0) { |
| 224 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 225 | "P2P: Failed to send Action frame"); |
| 226 | ret = -1; |
| 227 | } |
| 228 | |
| 229 | wpabuf_free(req); |
| 230 | |
| 231 | return ret; |
| 232 | } |
| 233 | |
| 234 | |
| 235 | void p2p_rx_gas_initial_req(struct p2p_data *p2p, const u8 *sa, |
| 236 | const u8 *data, size_t len, int rx_freq) |
| 237 | { |
| 238 | const u8 *pos = data; |
| 239 | const u8 *end = data + len; |
| 240 | const u8 *next; |
| 241 | u8 dialog_token; |
| 242 | u16 slen; |
| 243 | int freq; |
| 244 | u16 update_indic; |
| 245 | |
| 246 | |
| 247 | if (p2p->cfg->sd_request == NULL) |
| 248 | return; |
| 249 | |
| 250 | if (rx_freq > 0) |
| 251 | freq = rx_freq; |
| 252 | else |
| 253 | freq = p2p_channel_to_freq(p2p->cfg->country, |
| 254 | p2p->cfg->reg_class, |
| 255 | p2p->cfg->channel); |
| 256 | if (freq < 0) |
| 257 | return; |
| 258 | |
| 259 | if (len < 1 + 2) |
| 260 | return; |
| 261 | |
| 262 | dialog_token = *pos++; |
| 263 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 264 | "P2P: GAS Initial Request from " MACSTR " (dialog token %u, " |
| 265 | "freq %d)", |
| 266 | MAC2STR(sa), dialog_token, rx_freq); |
| 267 | |
| 268 | if (*pos != WLAN_EID_ADV_PROTO) { |
| 269 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 270 | "P2P: Unexpected IE in GAS Initial Request: %u", *pos); |
| 271 | return; |
| 272 | } |
| 273 | pos++; |
| 274 | |
| 275 | slen = *pos++; |
| 276 | next = pos + slen; |
| 277 | if (next > end || slen < 2) { |
| 278 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 279 | "P2P: Invalid IE in GAS Initial Request"); |
| 280 | return; |
| 281 | } |
| 282 | pos++; /* skip QueryRespLenLimit and PAME-BI */ |
| 283 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 284 | if (*pos != ACCESS_NETWORK_QUERY_PROTOCOL) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 285 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 286 | "P2P: Unsupported GAS advertisement protocol id %u", |
| 287 | *pos); |
| 288 | return; |
| 289 | } |
| 290 | |
| 291 | pos = next; |
| 292 | /* Query Request */ |
| 293 | if (pos + 2 > end) |
| 294 | return; |
| 295 | slen = WPA_GET_LE16(pos); |
| 296 | pos += 2; |
| 297 | if (pos + slen > end) |
| 298 | return; |
| 299 | end = pos + slen; |
| 300 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 301 | /* ANQP Query Request */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 302 | if (pos + 4 > end) |
| 303 | return; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 304 | if (WPA_GET_LE16(pos) != ANQP_VENDOR_SPECIFIC) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 305 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 306 | "P2P: Unsupported ANQP Info ID %u", WPA_GET_LE16(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 307 | return; |
| 308 | } |
| 309 | pos += 2; |
| 310 | |
| 311 | slen = WPA_GET_LE16(pos); |
| 312 | pos += 2; |
| 313 | if (pos + slen > end || slen < 3 + 1) { |
| 314 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 315 | "P2P: Invalid ANQP Query Request length"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 316 | return; |
| 317 | } |
| 318 | |
| 319 | if (WPA_GET_BE24(pos) != OUI_WFA) { |
| 320 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 321 | "P2P: Unsupported ANQP OUI %06x", WPA_GET_BE24(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 322 | return; |
| 323 | } |
| 324 | pos += 3; |
| 325 | |
| 326 | if (*pos != P2P_OUI_TYPE) { |
| 327 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 328 | "P2P: Unsupported ANQP vendor type %u", *pos); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 329 | return; |
| 330 | } |
| 331 | pos++; |
| 332 | |
| 333 | if (pos + 2 > end) |
| 334 | return; |
| 335 | update_indic = WPA_GET_LE16(pos); |
| 336 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 337 | "P2P: Service Update Indicator: %u", update_indic); |
| 338 | pos += 2; |
| 339 | |
| 340 | p2p->cfg->sd_request(p2p->cfg->cb_ctx, freq, sa, dialog_token, |
| 341 | update_indic, pos, end - pos); |
| 342 | /* the response will be indicated with a call to p2p_sd_response() */ |
| 343 | } |
| 344 | |
| 345 | |
| 346 | void p2p_sd_response(struct p2p_data *p2p, int freq, const u8 *dst, |
| 347 | u8 dialog_token, const struct wpabuf *resp_tlvs) |
| 348 | { |
| 349 | struct wpabuf *resp; |
| 350 | |
| 351 | /* TODO: fix the length limit to match with the maximum frame length */ |
| 352 | if (wpabuf_len(resp_tlvs) > 1400) { |
| 353 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: SD response long " |
| 354 | "enough to require fragmentation"); |
| 355 | if (p2p->sd_resp) { |
| 356 | /* |
| 357 | * TODO: Could consider storing the fragmented response |
| 358 | * separately for each peer to avoid having to drop old |
| 359 | * one if there is more than one pending SD query. |
| 360 | * Though, that would eat more memory, so there are |
| 361 | * also benefits to just using a single buffer. |
| 362 | */ |
| 363 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Drop " |
| 364 | "previous SD response"); |
| 365 | wpabuf_free(p2p->sd_resp); |
| 366 | } |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 367 | p2p->sd_resp = wpabuf_dup(resp_tlvs); |
| 368 | if (p2p->sd_resp == NULL) { |
| 369 | wpa_msg(p2p->cfg->msg_ctx, MSG_ERROR, "P2P: Failed to " |
| 370 | "allocate SD response fragmentation area"); |
| 371 | return; |
| 372 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 373 | os_memcpy(p2p->sd_resp_addr, dst, ETH_ALEN); |
| 374 | p2p->sd_resp_dialog_token = dialog_token; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 375 | p2p->sd_resp_pos = 0; |
| 376 | p2p->sd_frag_id = 0; |
| 377 | resp = p2p_build_sd_response(dialog_token, WLAN_STATUS_SUCCESS, |
| 378 | 1, p2p->srv_update_indic, NULL); |
| 379 | } else { |
| 380 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: SD response fits " |
| 381 | "in initial response"); |
| 382 | resp = p2p_build_sd_response(dialog_token, |
| 383 | WLAN_STATUS_SUCCESS, 0, |
| 384 | p2p->srv_update_indic, resp_tlvs); |
| 385 | } |
| 386 | if (resp == NULL) |
| 387 | return; |
| 388 | |
| 389 | p2p->pending_action_state = P2P_NO_PENDING_ACTION; |
| 390 | if (p2p_send_action(p2p, freq, dst, p2p->cfg->dev_addr, |
| 391 | p2p->cfg->dev_addr, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 392 | wpabuf_head(resp), wpabuf_len(resp), 200) < 0) |
| 393 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 394 | "P2P: Failed to send Action frame"); |
| 395 | |
| 396 | wpabuf_free(resp); |
| 397 | } |
| 398 | |
| 399 | |
| 400 | void p2p_rx_gas_initial_resp(struct p2p_data *p2p, const u8 *sa, |
| 401 | const u8 *data, size_t len, int rx_freq) |
| 402 | { |
| 403 | const u8 *pos = data; |
| 404 | const u8 *end = data + len; |
| 405 | const u8 *next; |
| 406 | u8 dialog_token; |
| 407 | u16 status_code; |
| 408 | u16 comeback_delay; |
| 409 | u16 slen; |
| 410 | u16 update_indic; |
| 411 | |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 412 | #ifdef ANDROID_P2P |
| 413 | if (p2p->state != P2P_SD_DURING_FIND) { |
| 414 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 415 | "P2P: #### Not ignoring unexpected GAS Initial Response from " |
| 416 | MACSTR " state %d", MAC2STR(sa), p2p->state); |
| 417 | } |
| 418 | if (p2p->sd_peer == NULL || |
| 419 | #else |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 420 | if (p2p->state != P2P_SD_DURING_FIND || p2p->sd_peer == NULL || |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 421 | #endif |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 422 | os_memcmp(sa, p2p->sd_peer->info.p2p_device_addr, ETH_ALEN) != 0) { |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 423 | wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 424 | "P2P: Ignore unexpected GAS Initial Response from " |
| 425 | MACSTR, MAC2STR(sa)); |
| 426 | return; |
| 427 | } |
| 428 | p2p->cfg->send_action_done(p2p->cfg->cb_ctx); |
| 429 | p2p_clear_timeout(p2p); |
| 430 | |
| 431 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 432 | "P2P: Received GAS Initial Response from " MACSTR " (len=%d)", |
| 433 | MAC2STR(sa), (int) len); |
| 434 | |
| 435 | if (len < 5 + 2) { |
| 436 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 437 | "P2P: Too short GAS Initial Response frame"); |
| 438 | return; |
| 439 | } |
| 440 | |
| 441 | dialog_token = *pos++; |
| 442 | /* TODO: check dialog_token match */ |
| 443 | status_code = WPA_GET_LE16(pos); |
| 444 | pos += 2; |
| 445 | comeback_delay = WPA_GET_LE16(pos); |
| 446 | pos += 2; |
| 447 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 448 | "P2P: dialog_token=%u status_code=%u comeback_delay=%u", |
| 449 | dialog_token, status_code, comeback_delay); |
| 450 | if (status_code) { |
| 451 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 452 | "P2P: Service Discovery failed: status code %u", |
| 453 | status_code); |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | if (*pos != WLAN_EID_ADV_PROTO) { |
| 458 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 459 | "P2P: Unexpected IE in GAS Initial Response: %u", |
| 460 | *pos); |
| 461 | return; |
| 462 | } |
| 463 | pos++; |
| 464 | |
| 465 | slen = *pos++; |
| 466 | next = pos + slen; |
| 467 | if (next > end || slen < 2) { |
| 468 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 469 | "P2P: Invalid IE in GAS Initial Response"); |
| 470 | return; |
| 471 | } |
| 472 | pos++; /* skip QueryRespLenLimit and PAME-BI */ |
| 473 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 474 | if (*pos != ACCESS_NETWORK_QUERY_PROTOCOL) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 475 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 476 | "P2P: Unsupported GAS advertisement protocol id %u", |
| 477 | *pos); |
| 478 | return; |
| 479 | } |
| 480 | |
| 481 | pos = next; |
| 482 | /* Query Response */ |
| 483 | if (pos + 2 > end) { |
| 484 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Too short Query " |
| 485 | "Response"); |
| 486 | return; |
| 487 | } |
| 488 | slen = WPA_GET_LE16(pos); |
| 489 | pos += 2; |
| 490 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Query Response Length: %d", |
| 491 | slen); |
| 492 | if (pos + slen > end) { |
| 493 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Not enough Query " |
| 494 | "Response data"); |
| 495 | return; |
| 496 | } |
| 497 | end = pos + slen; |
| 498 | |
| 499 | if (comeback_delay) { |
| 500 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Fragmented " |
| 501 | "response - request fragments"); |
| 502 | if (p2p->sd_rx_resp) { |
| 503 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Drop " |
| 504 | "old SD reassembly buffer"); |
| 505 | wpabuf_free(p2p->sd_rx_resp); |
| 506 | p2p->sd_rx_resp = NULL; |
| 507 | } |
| 508 | p2p_send_gas_comeback_req(p2p, sa, dialog_token, rx_freq); |
| 509 | return; |
| 510 | } |
| 511 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 512 | /* ANQP Query Response */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 513 | if (pos + 4 > end) |
| 514 | return; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 515 | if (WPA_GET_LE16(pos) != ANQP_VENDOR_SPECIFIC) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 516 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 517 | "P2P: Unsupported ANQP Info ID %u", WPA_GET_LE16(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 518 | return; |
| 519 | } |
| 520 | pos += 2; |
| 521 | |
| 522 | slen = WPA_GET_LE16(pos); |
| 523 | pos += 2; |
| 524 | if (pos + slen > end || slen < 3 + 1) { |
| 525 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 526 | "P2P: Invalid ANQP Query Response length"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 527 | return; |
| 528 | } |
| 529 | |
| 530 | if (WPA_GET_BE24(pos) != OUI_WFA) { |
| 531 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 532 | "P2P: Unsupported ANQP OUI %06x", WPA_GET_BE24(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 533 | return; |
| 534 | } |
| 535 | pos += 3; |
| 536 | |
| 537 | if (*pos != P2P_OUI_TYPE) { |
| 538 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 539 | "P2P: Unsupported ANQP vendor type %u", *pos); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 540 | return; |
| 541 | } |
| 542 | pos++; |
| 543 | |
| 544 | if (pos + 2 > end) |
| 545 | return; |
| 546 | update_indic = WPA_GET_LE16(pos); |
| 547 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 548 | "P2P: Service Update Indicator: %u", update_indic); |
| 549 | pos += 2; |
| 550 | |
| 551 | p2p->sd_peer->flags |= P2P_DEV_SD_INFO; |
| 552 | p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; |
| 553 | p2p->sd_peer = NULL; |
| 554 | |
| 555 | if (p2p->sd_query) { |
| 556 | if (!p2p->sd_query->for_all_peers) { |
| 557 | struct p2p_sd_query *q; |
| 558 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 559 | "P2P: Remove completed SD query %p", |
| 560 | p2p->sd_query); |
| 561 | q = p2p->sd_query; |
| 562 | p2p_unlink_sd_query(p2p, p2p->sd_query); |
| 563 | p2p_free_sd_query(q); |
| 564 | } |
| 565 | p2p->sd_query = NULL; |
| 566 | } |
| 567 | |
| 568 | if (p2p->cfg->sd_response) |
| 569 | p2p->cfg->sd_response(p2p->cfg->cb_ctx, sa, update_indic, |
| 570 | pos, end - pos); |
| 571 | p2p_continue_find(p2p); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | void p2p_rx_gas_comeback_req(struct p2p_data *p2p, const u8 *sa, |
| 576 | const u8 *data, size_t len, int rx_freq) |
| 577 | { |
| 578 | struct wpabuf *resp; |
| 579 | u8 dialog_token; |
| 580 | size_t frag_len; |
| 581 | int more = 0; |
| 582 | |
| 583 | wpa_hexdump(MSG_DEBUG, "P2P: RX GAS Comeback Request", data, len); |
| 584 | if (len < 1) |
| 585 | return; |
| 586 | dialog_token = *data; |
| 587 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Dialog Token: %u", |
| 588 | dialog_token); |
| 589 | if (dialog_token != p2p->sd_resp_dialog_token) { |
| 590 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: No pending SD " |
| 591 | "response fragment for dialog token %u", dialog_token); |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | if (p2p->sd_resp == NULL) { |
| 596 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: No pending SD " |
| 597 | "response fragment available"); |
| 598 | return; |
| 599 | } |
| 600 | if (os_memcmp(sa, p2p->sd_resp_addr, ETH_ALEN) != 0) { |
| 601 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: No pending SD " |
| 602 | "response fragment for " MACSTR, MAC2STR(sa)); |
| 603 | return; |
| 604 | } |
| 605 | |
| 606 | frag_len = wpabuf_len(p2p->sd_resp) - p2p->sd_resp_pos; |
| 607 | if (frag_len > 1400) { |
| 608 | frag_len = 1400; |
| 609 | more = 1; |
| 610 | } |
| 611 | resp = p2p_build_gas_comeback_resp(dialog_token, WLAN_STATUS_SUCCESS, |
| 612 | p2p->srv_update_indic, |
| 613 | wpabuf_head_u8(p2p->sd_resp) + |
| 614 | p2p->sd_resp_pos, frag_len, |
| 615 | p2p->sd_frag_id, more, |
| 616 | wpabuf_len(p2p->sd_resp)); |
| 617 | if (resp == NULL) |
| 618 | return; |
| 619 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Send GAS Comeback " |
| 620 | "Response (frag_id %d more=%d frag_len=%d)", |
| 621 | p2p->sd_frag_id, more, (int) frag_len); |
| 622 | p2p->sd_frag_id++; |
| 623 | p2p->sd_resp_pos += frag_len; |
| 624 | |
| 625 | if (more) { |
| 626 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: %d more bytes " |
| 627 | "remain to be sent", |
| 628 | (int) (wpabuf_len(p2p->sd_resp) - p2p->sd_resp_pos)); |
| 629 | } else { |
| 630 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: All fragments of " |
| 631 | "SD response sent"); |
| 632 | wpabuf_free(p2p->sd_resp); |
| 633 | p2p->sd_resp = NULL; |
| 634 | } |
| 635 | |
| 636 | p2p->pending_action_state = P2P_NO_PENDING_ACTION; |
| 637 | if (p2p_send_action(p2p, rx_freq, sa, p2p->cfg->dev_addr, |
| 638 | p2p->cfg->dev_addr, |
| 639 | wpabuf_head(resp), wpabuf_len(resp), 200) < 0) |
| 640 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 641 | "P2P: Failed to send Action frame"); |
| 642 | |
| 643 | wpabuf_free(resp); |
| 644 | } |
| 645 | |
| 646 | |
| 647 | void p2p_rx_gas_comeback_resp(struct p2p_data *p2p, const u8 *sa, |
| 648 | const u8 *data, size_t len, int rx_freq) |
| 649 | { |
| 650 | const u8 *pos = data; |
| 651 | const u8 *end = data + len; |
| 652 | const u8 *next; |
| 653 | u8 dialog_token; |
| 654 | u16 status_code; |
| 655 | u8 frag_id; |
| 656 | u8 more_frags; |
| 657 | u16 comeback_delay; |
| 658 | u16 slen; |
| 659 | |
| 660 | wpa_hexdump(MSG_DEBUG, "P2P: RX GAS Comeback Response", data, len); |
| 661 | |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 662 | #ifdef ANDROID_P2P |
| 663 | if (p2p->state != P2P_SD_DURING_FIND) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 664 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 665 | "P2P: #### Not ignoring unexpected GAS Comeback Response from " |
| 666 | MACSTR " state %d", MAC2STR(sa), p2p->state); |
| 667 | } |
| 668 | if (p2p->sd_peer == NULL || |
| 669 | #else |
| 670 | if (p2p->state != P2P_SD_DURING_FIND || p2p->sd_peer == NULL || |
| 671 | #endif |
| 672 | os_memcmp(sa, p2p->sd_peer->info.p2p_device_addr, ETH_ALEN) != 0) { |
| 673 | wpa_msg(p2p->cfg->msg_ctx, MSG_INFO, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 674 | "P2P: Ignore unexpected GAS Comeback Response from " |
| 675 | MACSTR, MAC2STR(sa)); |
| 676 | return; |
| 677 | } |
| 678 | p2p->cfg->send_action_done(p2p->cfg->cb_ctx); |
| 679 | p2p_clear_timeout(p2p); |
| 680 | |
| 681 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 682 | "P2P: Received GAS Comeback Response from " MACSTR " (len=%d)", |
| 683 | MAC2STR(sa), (int) len); |
| 684 | |
| 685 | if (len < 6 + 2) { |
| 686 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 687 | "P2P: Too short GAS Comeback Response frame"); |
| 688 | return; |
| 689 | } |
| 690 | |
| 691 | dialog_token = *pos++; |
| 692 | /* TODO: check dialog_token match */ |
| 693 | status_code = WPA_GET_LE16(pos); |
| 694 | pos += 2; |
| 695 | frag_id = *pos & 0x7f; |
| 696 | more_frags = (*pos & 0x80) >> 7; |
| 697 | pos++; |
| 698 | comeback_delay = WPA_GET_LE16(pos); |
| 699 | pos += 2; |
| 700 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 701 | "P2P: dialog_token=%u status_code=%u frag_id=%d more_frags=%d " |
| 702 | "comeback_delay=%u", |
| 703 | dialog_token, status_code, frag_id, more_frags, |
| 704 | comeback_delay); |
| 705 | /* TODO: check frag_id match */ |
| 706 | if (status_code) { |
| 707 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 708 | "P2P: Service Discovery failed: status code %u", |
| 709 | status_code); |
| 710 | return; |
| 711 | } |
| 712 | |
| 713 | if (*pos != WLAN_EID_ADV_PROTO) { |
| 714 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 715 | "P2P: Unexpected IE in GAS Comeback Response: %u", |
| 716 | *pos); |
| 717 | return; |
| 718 | } |
| 719 | pos++; |
| 720 | |
| 721 | slen = *pos++; |
| 722 | next = pos + slen; |
| 723 | if (next > end || slen < 2) { |
| 724 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 725 | "P2P: Invalid IE in GAS Comeback Response"); |
| 726 | return; |
| 727 | } |
| 728 | pos++; /* skip QueryRespLenLimit and PAME-BI */ |
| 729 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 730 | if (*pos != ACCESS_NETWORK_QUERY_PROTOCOL) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 731 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 732 | "P2P: Unsupported GAS advertisement protocol id %u", |
| 733 | *pos); |
| 734 | return; |
| 735 | } |
| 736 | |
| 737 | pos = next; |
| 738 | /* Query Response */ |
| 739 | if (pos + 2 > end) { |
| 740 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Too short Query " |
| 741 | "Response"); |
| 742 | return; |
| 743 | } |
| 744 | slen = WPA_GET_LE16(pos); |
| 745 | pos += 2; |
| 746 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Query Response Length: %d", |
| 747 | slen); |
| 748 | if (pos + slen > end) { |
| 749 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Not enough Query " |
| 750 | "Response data"); |
| 751 | return; |
| 752 | } |
| 753 | if (slen == 0) { |
| 754 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: No Query Response " |
| 755 | "data"); |
| 756 | return; |
| 757 | } |
| 758 | end = pos + slen; |
| 759 | |
| 760 | if (p2p->sd_rx_resp) { |
| 761 | /* |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 762 | * ANQP header is only included in the first fragment; rest of |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 763 | * the fragments start with continue TLVs. |
| 764 | */ |
| 765 | goto skip_nqp_header; |
| 766 | } |
| 767 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 768 | /* ANQP Query Response */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 769 | if (pos + 4 > end) |
| 770 | return; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 771 | if (WPA_GET_LE16(pos) != ANQP_VENDOR_SPECIFIC) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 772 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 773 | "P2P: Unsupported ANQP Info ID %u", WPA_GET_LE16(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 774 | return; |
| 775 | } |
| 776 | pos += 2; |
| 777 | |
| 778 | slen = WPA_GET_LE16(pos); |
| 779 | pos += 2; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 780 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: ANQP Query Response " |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 781 | "length: %u", slen); |
| 782 | if (slen < 3 + 1) { |
| 783 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 784 | "P2P: Invalid ANQP Query Response length"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 785 | return; |
| 786 | } |
| 787 | if (pos + 4 > end) |
| 788 | return; |
| 789 | |
| 790 | if (WPA_GET_BE24(pos) != OUI_WFA) { |
| 791 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 792 | "P2P: Unsupported ANQP OUI %06x", WPA_GET_BE24(pos)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 793 | return; |
| 794 | } |
| 795 | pos += 3; |
| 796 | |
| 797 | if (*pos != P2P_OUI_TYPE) { |
| 798 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 799 | "P2P: Unsupported ANQP vendor type %u", *pos); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 800 | return; |
| 801 | } |
| 802 | pos++; |
| 803 | |
| 804 | if (pos + 2 > end) |
| 805 | return; |
| 806 | p2p->sd_rx_update_indic = WPA_GET_LE16(pos); |
| 807 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 808 | "P2P: Service Update Indicator: %u", p2p->sd_rx_update_indic); |
| 809 | pos += 2; |
| 810 | |
| 811 | skip_nqp_header: |
| 812 | if (wpabuf_resize(&p2p->sd_rx_resp, end - pos) < 0) |
| 813 | return; |
| 814 | wpabuf_put_data(p2p->sd_rx_resp, pos, end - pos); |
| 815 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Current SD reassembly " |
| 816 | "buffer length: %u", |
| 817 | (unsigned int) wpabuf_len(p2p->sd_rx_resp)); |
| 818 | |
| 819 | if (more_frags) { |
| 820 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: More fragments " |
| 821 | "remains"); |
| 822 | /* TODO: what would be a good size limit? */ |
| 823 | if (wpabuf_len(p2p->sd_rx_resp) > 64000) { |
| 824 | wpabuf_free(p2p->sd_rx_resp); |
| 825 | p2p->sd_rx_resp = NULL; |
| 826 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Too long " |
| 827 | "SD response - drop it"); |
| 828 | return; |
| 829 | } |
| 830 | p2p_send_gas_comeback_req(p2p, sa, dialog_token, rx_freq); |
| 831 | return; |
| 832 | } |
| 833 | |
| 834 | p2p->sd_peer->flags |= P2P_DEV_SD_INFO; |
| 835 | p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE; |
| 836 | p2p->sd_peer = NULL; |
| 837 | |
| 838 | if (p2p->sd_query) { |
| 839 | if (!p2p->sd_query->for_all_peers) { |
| 840 | struct p2p_sd_query *q; |
| 841 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 842 | "P2P: Remove completed SD query %p", |
| 843 | p2p->sd_query); |
| 844 | q = p2p->sd_query; |
| 845 | p2p_unlink_sd_query(p2p, p2p->sd_query); |
| 846 | p2p_free_sd_query(q); |
| 847 | } |
| 848 | p2p->sd_query = NULL; |
| 849 | } |
| 850 | |
| 851 | if (p2p->cfg->sd_response) |
| 852 | p2p->cfg->sd_response(p2p->cfg->cb_ctx, sa, |
| 853 | p2p->sd_rx_update_indic, |
| 854 | wpabuf_head(p2p->sd_rx_resp), |
| 855 | wpabuf_len(p2p->sd_rx_resp)); |
| 856 | wpabuf_free(p2p->sd_rx_resp); |
| 857 | p2p->sd_rx_resp = NULL; |
| 858 | |
| 859 | p2p_continue_find(p2p); |
| 860 | } |
| 861 | |
| 862 | |
| 863 | void * p2p_sd_request(struct p2p_data *p2p, const u8 *dst, |
| 864 | const struct wpabuf *tlvs) |
| 865 | { |
| 866 | struct p2p_sd_query *q; |
Irfan Sheriff | f44b9c4 | 2012-06-13 11:09:23 -0700 | [diff] [blame] | 867 | #ifdef ANDROID_P2P |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 868 | /* Currently, supplicant doesn't support more than one pending broadcast SD request. |
Irfan Sheriff | f44b9c4 | 2012-06-13 11:09:23 -0700 | [diff] [blame] | 869 | * So reject if application is registering another one before cancelling the existing one. |
| 870 | */ |
| 871 | for (q = p2p->sd_queries; q; q = q->next) { |
| 872 | if( (q->for_all_peers == 1) && (!dst)) { |
| 873 | wpa_printf(MSG_ERROR, "P2P: Already one pending" |
| 874 | " Broadcast request. Please cancel the current one" |
| 875 | " before adding a new one"); |
| 876 | return NULL; |
| 877 | } |
| 878 | } |
| 879 | #endif |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 880 | |
| 881 | q = os_zalloc(sizeof(*q)); |
| 882 | if (q == NULL) |
| 883 | return NULL; |
| 884 | |
| 885 | if (dst) |
| 886 | os_memcpy(q->peer, dst, ETH_ALEN); |
| 887 | else |
| 888 | q->for_all_peers = 1; |
| 889 | |
| 890 | q->tlvs = wpabuf_dup(tlvs); |
| 891 | if (q->tlvs == NULL) { |
| 892 | p2p_free_sd_query(q); |
| 893 | return NULL; |
| 894 | } |
| 895 | |
| 896 | q->next = p2p->sd_queries; |
| 897 | p2p->sd_queries = q; |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 898 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Added SD Query %p", q); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 899 | |
Irfan Sheriff | 9616187 | 2012-04-11 18:07:13 -0700 | [diff] [blame] | 900 | if (dst == NULL) { |
| 901 | struct p2p_device *dev; |
| 902 | dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) |
| 903 | dev->flags &= ~P2P_DEV_SD_INFO; |
| 904 | } |
| 905 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 906 | return q; |
| 907 | } |
| 908 | |
| 909 | |
| 910 | void p2p_sd_service_update(struct p2p_data *p2p) |
| 911 | { |
| 912 | p2p->srv_update_indic++; |
| 913 | } |
| 914 | |
| 915 | |
| 916 | int p2p_sd_cancel_request(struct p2p_data *p2p, void *req) |
| 917 | { |
| 918 | if (p2p_unlink_sd_query(p2p, req)) { |
| 919 | wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| 920 | "P2P: Cancel pending SD query %p", req); |
Irfan Sheriff | f44b9c4 | 2012-06-13 11:09:23 -0700 | [diff] [blame] | 921 | #ifdef ANDROID_P2P |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame^] | 922 | p2p->sd_dev_list = NULL; |
Irfan Sheriff | f44b9c4 | 2012-06-13 11:09:23 -0700 | [diff] [blame] | 923 | #endif |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 924 | p2p_free_sd_query(req); |
| 925 | return 0; |
| 926 | } |
| 927 | return -1; |
| 928 | } |