Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Wi-Fi Direct - P2P group operations |
| 3 | * Copyright (c) 2009-2010, 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" |
| 13 | #include "common/ieee802_11_common.h" |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 14 | #include "common/wpa_ctrl.h" |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 15 | #include "wps/wps_defs.h" |
| 16 | #include "wps/wps_i.h" |
| 17 | #include "p2p_i.h" |
| 18 | #include "p2p.h" |
| 19 | |
| 20 | |
| 21 | struct p2p_group_member { |
| 22 | struct p2p_group_member *next; |
| 23 | u8 addr[ETH_ALEN]; /* P2P Interface Address */ |
| 24 | u8 dev_addr[ETH_ALEN]; /* P2P Device Address */ |
| 25 | struct wpabuf *p2p_ie; |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 26 | struct wpabuf *wfd_ie; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 27 | struct wpabuf *client_info; |
| 28 | u8 dev_capab; |
| 29 | }; |
| 30 | |
| 31 | /** |
| 32 | * struct p2p_group - Internal P2P module per-group data |
| 33 | */ |
| 34 | struct p2p_group { |
| 35 | struct p2p_data *p2p; |
| 36 | struct p2p_group_config *cfg; |
| 37 | struct p2p_group_member *members; |
| 38 | unsigned int num_members; |
| 39 | int group_formation; |
| 40 | int beacon_update; |
| 41 | struct wpabuf *noa; |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 42 | struct wpabuf *wfd_ie; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 46 | struct p2p_group * p2p_group_init(struct p2p_data *p2p, |
| 47 | struct p2p_group_config *config) |
| 48 | { |
| 49 | struct p2p_group *group, **groups; |
| 50 | |
| 51 | group = os_zalloc(sizeof(*group)); |
| 52 | if (group == NULL) |
| 53 | return NULL; |
| 54 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 55 | groups = os_realloc_array(p2p->groups, p2p->num_groups + 1, |
| 56 | sizeof(struct p2p_group *)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 57 | if (groups == NULL) { |
| 58 | os_free(group); |
| 59 | return NULL; |
| 60 | } |
| 61 | groups[p2p->num_groups++] = group; |
| 62 | p2p->groups = groups; |
| 63 | |
| 64 | group->p2p = p2p; |
| 65 | group->cfg = config; |
| 66 | group->group_formation = 1; |
| 67 | group->beacon_update = 1; |
| 68 | p2p_group_update_ies(group); |
| 69 | group->cfg->idle_update(group->cfg->cb_ctx, 1); |
| 70 | |
| 71 | return group; |
| 72 | } |
| 73 | |
| 74 | |
| 75 | static void p2p_group_free_member(struct p2p_group_member *m) |
| 76 | { |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 77 | wpabuf_free(m->wfd_ie); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 78 | wpabuf_free(m->p2p_ie); |
| 79 | wpabuf_free(m->client_info); |
| 80 | os_free(m); |
| 81 | } |
| 82 | |
| 83 | |
| 84 | static void p2p_group_free_members(struct p2p_group *group) |
| 85 | { |
| 86 | struct p2p_group_member *m, *prev; |
| 87 | m = group->members; |
| 88 | group->members = NULL; |
| 89 | group->num_members = 0; |
| 90 | while (m) { |
| 91 | prev = m; |
| 92 | m = m->next; |
| 93 | p2p_group_free_member(prev); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | |
| 98 | void p2p_group_deinit(struct p2p_group *group) |
| 99 | { |
| 100 | size_t g; |
| 101 | struct p2p_data *p2p; |
| 102 | |
| 103 | if (group == NULL) |
| 104 | return; |
| 105 | |
| 106 | p2p = group->p2p; |
| 107 | |
| 108 | for (g = 0; g < p2p->num_groups; g++) { |
| 109 | if (p2p->groups[g] == group) { |
| 110 | while (g + 1 < p2p->num_groups) { |
| 111 | p2p->groups[g] = p2p->groups[g + 1]; |
| 112 | g++; |
| 113 | } |
| 114 | p2p->num_groups--; |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | p2p_group_free_members(group); |
| 120 | os_free(group->cfg); |
| 121 | wpabuf_free(group->noa); |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 122 | wpabuf_free(group->wfd_ie); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 123 | os_free(group); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | static void p2p_client_info(struct wpabuf *ie, struct p2p_group_member *m) |
| 128 | { |
| 129 | if (m->client_info == NULL) |
| 130 | return; |
| 131 | if (wpabuf_tailroom(ie) < wpabuf_len(m->client_info) + 1) |
| 132 | return; |
| 133 | wpabuf_put_buf(ie, m->client_info); |
| 134 | } |
| 135 | |
| 136 | |
| 137 | static void p2p_group_add_common_ies(struct p2p_group *group, |
| 138 | struct wpabuf *ie) |
| 139 | { |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 140 | u8 dev_capab = group->p2p->dev_capab, group_capab = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 141 | |
| 142 | /* P2P Capability */ |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 143 | dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 144 | group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 145 | if (group->cfg->persistent_group) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 146 | group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 147 | if (group->cfg->persistent_group == 2) |
| 148 | group_capab |= P2P_GROUP_CAPAB_PERSISTENT_RECONN; |
| 149 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 150 | if (group->p2p->cfg->p2p_intra_bss) |
| 151 | group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST; |
| 152 | if (group->group_formation) |
| 153 | group_capab |= P2P_GROUP_CAPAB_GROUP_FORMATION; |
| 154 | if (group->p2p->cross_connect) |
| 155 | group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; |
| 156 | if (group->num_members >= group->cfg->max_clients) |
| 157 | group_capab |= P2P_GROUP_CAPAB_GROUP_LIMIT; |
Dmitry Shmidt | e466304 | 2016-04-04 10:07:49 -0700 | [diff] [blame] | 158 | if (group->cfg->ip_addr_alloc) |
| 159 | group_capab |= P2P_GROUP_CAPAB_IP_ADDR_ALLOCATION; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 160 | p2p_buf_add_capability(ie, dev_capab, group_capab); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | static void p2p_group_add_noa(struct wpabuf *ie, struct wpabuf *noa) |
| 165 | { |
| 166 | if (noa == NULL) |
| 167 | return; |
| 168 | /* Notice of Absence */ |
| 169 | wpabuf_put_u8(ie, P2P_ATTR_NOTICE_OF_ABSENCE); |
| 170 | wpabuf_put_le16(ie, wpabuf_len(noa)); |
| 171 | wpabuf_put_buf(ie, noa); |
| 172 | } |
| 173 | |
| 174 | |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 175 | static struct wpabuf * p2p_group_encaps_probe_resp(struct wpabuf *subelems) |
| 176 | { |
| 177 | struct wpabuf *ie; |
| 178 | const u8 *pos, *end; |
| 179 | size_t len; |
| 180 | |
| 181 | if (subelems == NULL) |
| 182 | return NULL; |
| 183 | |
| 184 | len = wpabuf_len(subelems) + 100; |
| 185 | |
| 186 | ie = wpabuf_alloc(len); |
| 187 | if (ie == NULL) |
| 188 | return NULL; |
| 189 | |
| 190 | pos = wpabuf_head(subelems); |
| 191 | end = pos + wpabuf_len(subelems); |
| 192 | |
| 193 | while (end > pos) { |
| 194 | size_t frag_len = end - pos; |
| 195 | if (frag_len > 251) |
| 196 | frag_len = 251; |
| 197 | wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC); |
| 198 | wpabuf_put_u8(ie, 4 + frag_len); |
| 199 | wpabuf_put_be32(ie, P2P_IE_VENDOR_TYPE); |
| 200 | wpabuf_put_data(ie, pos, frag_len); |
| 201 | pos += frag_len; |
| 202 | } |
| 203 | |
| 204 | return ie; |
| 205 | } |
| 206 | |
| 207 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 208 | static struct wpabuf * p2p_group_build_beacon_ie(struct p2p_group *group) |
| 209 | { |
| 210 | struct wpabuf *ie; |
| 211 | u8 *len; |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 212 | size_t extra = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 213 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 214 | #ifdef CONFIG_WIFI_DISPLAY |
| 215 | if (group->p2p->wfd_ie_beacon) |
| 216 | extra = wpabuf_len(group->p2p->wfd_ie_beacon); |
| 217 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 218 | |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 219 | if (group->p2p->vendor_elem && |
| 220 | group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO]) |
| 221 | extra += wpabuf_len(group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO]); |
| 222 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 223 | ie = wpabuf_alloc(257 + extra); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 224 | if (ie == NULL) |
| 225 | return NULL; |
| 226 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 227 | #ifdef CONFIG_WIFI_DISPLAY |
| 228 | if (group->p2p->wfd_ie_beacon) |
| 229 | wpabuf_put_buf(ie, group->p2p->wfd_ie_beacon); |
| 230 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 231 | |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 232 | if (group->p2p->vendor_elem && |
| 233 | group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO]) |
| 234 | wpabuf_put_buf(ie, |
| 235 | group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO]); |
| 236 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 237 | len = p2p_buf_add_ie_hdr(ie); |
| 238 | p2p_group_add_common_ies(group, ie); |
| 239 | p2p_buf_add_device_id(ie, group->p2p->cfg->dev_addr); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 240 | p2p_group_add_noa(ie, group->noa); |
| 241 | p2p_buf_update_ie_hdr(ie, len); |
| 242 | |
| 243 | return ie; |
| 244 | } |
| 245 | |
| 246 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 247 | #ifdef CONFIG_WIFI_DISPLAY |
| 248 | |
| 249 | struct wpabuf * p2p_group_get_wfd_ie(struct p2p_group *g) |
| 250 | { |
| 251 | return g->wfd_ie; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | struct wpabuf * wifi_display_encaps(struct wpabuf *subelems) |
| 256 | { |
| 257 | struct wpabuf *ie; |
| 258 | const u8 *pos, *end; |
| 259 | |
| 260 | if (subelems == NULL) |
| 261 | return NULL; |
| 262 | |
| 263 | ie = wpabuf_alloc(wpabuf_len(subelems) + 100); |
| 264 | if (ie == NULL) |
| 265 | return NULL; |
| 266 | |
| 267 | pos = wpabuf_head(subelems); |
| 268 | end = pos + wpabuf_len(subelems); |
| 269 | |
| 270 | while (end > pos) { |
| 271 | size_t frag_len = end - pos; |
| 272 | if (frag_len > 251) |
| 273 | frag_len = 251; |
| 274 | wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC); |
| 275 | wpabuf_put_u8(ie, 4 + frag_len); |
| 276 | wpabuf_put_be32(ie, WFD_IE_VENDOR_TYPE); |
| 277 | wpabuf_put_data(ie, pos, frag_len); |
| 278 | pos += frag_len; |
| 279 | } |
| 280 | |
| 281 | return ie; |
| 282 | } |
| 283 | |
| 284 | |
| 285 | static int wifi_display_add_dev_info_descr(struct wpabuf *buf, |
| 286 | struct p2p_group_member *m) |
| 287 | { |
| 288 | const u8 *pos, *end; |
| 289 | const u8 *dev_info = NULL; |
| 290 | const u8 *assoc_bssid = NULL; |
| 291 | const u8 *coupled_sink = NULL; |
| 292 | u8 zero_addr[ETH_ALEN]; |
| 293 | |
| 294 | if (m->wfd_ie == NULL) |
| 295 | return 0; |
| 296 | |
| 297 | os_memset(zero_addr, 0, ETH_ALEN); |
| 298 | pos = wpabuf_head_u8(m->wfd_ie); |
| 299 | end = pos + wpabuf_len(m->wfd_ie); |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 300 | while (end - pos >= 3) { |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 301 | u8 id; |
| 302 | u16 len; |
| 303 | |
| 304 | id = *pos++; |
| 305 | len = WPA_GET_BE16(pos); |
| 306 | pos += 2; |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 307 | if (len > end - pos) |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 308 | break; |
| 309 | |
| 310 | switch (id) { |
| 311 | case WFD_SUBELEM_DEVICE_INFO: |
| 312 | if (len < 6) |
| 313 | break; |
| 314 | dev_info = pos; |
| 315 | break; |
| 316 | case WFD_SUBELEM_ASSOCIATED_BSSID: |
| 317 | if (len < ETH_ALEN) |
| 318 | break; |
| 319 | assoc_bssid = pos; |
| 320 | break; |
| 321 | case WFD_SUBELEM_COUPLED_SINK: |
| 322 | if (len < 1 + ETH_ALEN) |
| 323 | break; |
| 324 | coupled_sink = pos; |
| 325 | break; |
| 326 | } |
| 327 | |
| 328 | pos += len; |
| 329 | } |
| 330 | |
| 331 | if (dev_info == NULL) |
| 332 | return 0; |
| 333 | |
| 334 | wpabuf_put_u8(buf, 23); |
| 335 | wpabuf_put_data(buf, m->dev_addr, ETH_ALEN); |
| 336 | if (assoc_bssid) |
| 337 | wpabuf_put_data(buf, assoc_bssid, ETH_ALEN); |
| 338 | else |
| 339 | wpabuf_put_data(buf, zero_addr, ETH_ALEN); |
| 340 | wpabuf_put_data(buf, dev_info, 2); /* WFD Device Info */ |
| 341 | wpabuf_put_data(buf, dev_info + 4, 2); /* WFD Device Max Throughput */ |
| 342 | if (coupled_sink) { |
| 343 | wpabuf_put_data(buf, coupled_sink, 1 + ETH_ALEN); |
| 344 | } else { |
| 345 | wpabuf_put_u8(buf, 0); |
| 346 | wpabuf_put_data(buf, zero_addr, ETH_ALEN); |
| 347 | } |
| 348 | |
| 349 | return 1; |
| 350 | } |
| 351 | |
| 352 | |
| 353 | static struct wpabuf * |
| 354 | wifi_display_build_go_ie(struct p2p_group *group) |
| 355 | { |
| 356 | struct wpabuf *wfd_subelems, *wfd_ie; |
| 357 | struct p2p_group_member *m; |
| 358 | u8 *len; |
| 359 | unsigned int count = 0; |
| 360 | |
| 361 | if (!group->p2p->wfd_ie_probe_resp) |
| 362 | return NULL; |
| 363 | |
| 364 | wfd_subelems = wpabuf_alloc(wpabuf_len(group->p2p->wfd_ie_probe_resp) + |
| 365 | group->num_members * 24 + 100); |
| 366 | if (wfd_subelems == NULL) |
| 367 | return NULL; |
| 368 | if (group->p2p->wfd_dev_info) |
| 369 | wpabuf_put_buf(wfd_subelems, group->p2p->wfd_dev_info); |
Dmitry Shmidt | d2986c2 | 2017-10-23 14:22:09 -0700 | [diff] [blame] | 370 | if (group->p2p->wfd_r2_dev_info) |
| 371 | wpabuf_put_buf(wfd_subelems, group->p2p->wfd_r2_dev_info); |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 372 | if (group->p2p->wfd_assoc_bssid) |
| 373 | wpabuf_put_buf(wfd_subelems, |
| 374 | group->p2p->wfd_assoc_bssid); |
| 375 | if (group->p2p->wfd_coupled_sink_info) |
| 376 | wpabuf_put_buf(wfd_subelems, |
| 377 | group->p2p->wfd_coupled_sink_info); |
| 378 | |
| 379 | /* Build WFD Session Info */ |
| 380 | wpabuf_put_u8(wfd_subelems, WFD_SUBELEM_SESSION_INFO); |
| 381 | len = wpabuf_put(wfd_subelems, 2); |
| 382 | m = group->members; |
| 383 | while (m) { |
| 384 | if (wifi_display_add_dev_info_descr(wfd_subelems, m)) |
| 385 | count++; |
| 386 | m = m->next; |
| 387 | } |
| 388 | |
| 389 | if (count == 0) { |
| 390 | /* No Wi-Fi Display clients - do not include subelement */ |
| 391 | wfd_subelems->used -= 3; |
| 392 | } else { |
| 393 | WPA_PUT_BE16(len, (u8 *) wpabuf_put(wfd_subelems, 0) - len - |
| 394 | 2); |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 395 | p2p_dbg(group->p2p, "WFD: WFD Session Info: %u descriptors", |
| 396 | count); |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | wfd_ie = wifi_display_encaps(wfd_subelems); |
| 400 | wpabuf_free(wfd_subelems); |
| 401 | |
| 402 | return wfd_ie; |
| 403 | } |
| 404 | |
| 405 | static void wifi_display_group_update(struct p2p_group *group) |
| 406 | { |
| 407 | wpabuf_free(group->wfd_ie); |
| 408 | group->wfd_ie = wifi_display_build_go_ie(group); |
| 409 | } |
| 410 | |
| 411 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 412 | |
| 413 | |
Dmitry Shmidt | cf32e60 | 2014-01-28 10:57:39 -0800 | [diff] [blame] | 414 | void p2p_buf_add_group_info(struct p2p_group *group, struct wpabuf *buf, |
| 415 | int max_clients) |
| 416 | { |
| 417 | u8 *group_info; |
| 418 | int count = 0; |
| 419 | struct p2p_group_member *m; |
| 420 | |
| 421 | p2p_dbg(group->p2p, "* P2P Group Info"); |
| 422 | group_info = wpabuf_put(buf, 0); |
| 423 | wpabuf_put_u8(buf, P2P_ATTR_GROUP_INFO); |
| 424 | wpabuf_put_le16(buf, 0); /* Length to be filled */ |
| 425 | for (m = group->members; m; m = m->next) { |
| 426 | p2p_client_info(buf, m); |
| 427 | count++; |
| 428 | if (max_clients >= 0 && count >= max_clients) |
| 429 | break; |
| 430 | } |
| 431 | WPA_PUT_LE16(group_info + 1, |
| 432 | (u8 *) wpabuf_put(buf, 0) - group_info - 3); |
| 433 | } |
| 434 | |
| 435 | |
| 436 | void p2p_group_buf_add_id(struct p2p_group *group, struct wpabuf *buf) |
| 437 | { |
| 438 | p2p_buf_add_group_id(buf, group->p2p->cfg->dev_addr, group->cfg->ssid, |
| 439 | group->cfg->ssid_len); |
| 440 | } |
| 441 | |
| 442 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 443 | static struct wpabuf * p2p_group_build_probe_resp_ie(struct p2p_group *group) |
| 444 | { |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 445 | struct wpabuf *p2p_subelems, *ie; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 446 | |
Jouni Malinen | 33077b1 | 2013-02-27 07:46:44 -0800 | [diff] [blame] | 447 | p2p_subelems = wpabuf_alloc(500); |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 448 | if (p2p_subelems == NULL) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 449 | return NULL; |
| 450 | |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 451 | p2p_group_add_common_ies(group, p2p_subelems); |
| 452 | p2p_group_add_noa(p2p_subelems, group->noa); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 453 | |
| 454 | /* P2P Device Info */ |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 455 | p2p_buf_add_device_info(p2p_subelems, group->p2p, NULL); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 456 | |
Dmitry Shmidt | 444d567 | 2013-04-01 13:08:44 -0700 | [diff] [blame] | 457 | /* P2P Group Info: Only when at least one P2P Client is connected */ |
Dmitry Shmidt | cf32e60 | 2014-01-28 10:57:39 -0800 | [diff] [blame] | 458 | if (group->members) |
| 459 | p2p_buf_add_group_info(group, p2p_subelems, -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 460 | |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 461 | ie = p2p_group_encaps_probe_resp(p2p_subelems); |
| 462 | wpabuf_free(p2p_subelems); |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 463 | |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 464 | if (group->p2p->vendor_elem && |
| 465 | group->p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P_GO]) { |
| 466 | struct wpabuf *extra; |
| 467 | extra = wpabuf_dup(group->p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P_GO]); |
| 468 | ie = wpabuf_concat(extra, ie); |
| 469 | } |
| 470 | |
Jouni Malinen | 33077b1 | 2013-02-27 07:46:44 -0800 | [diff] [blame] | 471 | #ifdef CONFIG_WIFI_DISPLAY |
| 472 | if (group->wfd_ie) { |
| 473 | struct wpabuf *wfd = wpabuf_dup(group->wfd_ie); |
| 474 | ie = wpabuf_concat(wfd, ie); |
| 475 | } |
| 476 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 477 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 478 | return ie; |
| 479 | } |
| 480 | |
| 481 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 482 | void p2p_group_update_ies(struct p2p_group *group) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 483 | { |
| 484 | struct wpabuf *beacon_ie; |
| 485 | struct wpabuf *probe_resp_ie; |
| 486 | |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 487 | #ifdef CONFIG_WIFI_DISPLAY |
| 488 | wifi_display_group_update(group); |
| 489 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 490 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 491 | probe_resp_ie = p2p_group_build_probe_resp_ie(group); |
| 492 | if (probe_resp_ie == NULL) |
| 493 | return; |
| 494 | wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Probe Response P2P IE", |
| 495 | probe_resp_ie); |
| 496 | |
| 497 | if (group->beacon_update) { |
| 498 | beacon_ie = p2p_group_build_beacon_ie(group); |
| 499 | if (beacon_ie) |
| 500 | group->beacon_update = 0; |
| 501 | wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Beacon P2P IE", |
| 502 | beacon_ie); |
| 503 | } else |
| 504 | beacon_ie = NULL; |
| 505 | |
| 506 | group->cfg->ie_update(group->cfg->cb_ctx, beacon_ie, probe_resp_ie); |
| 507 | } |
| 508 | |
| 509 | |
| 510 | /** |
| 511 | * p2p_build_client_info - Build P2P Client Info Descriptor |
| 512 | * @addr: MAC address of the peer device |
| 513 | * @p2p_ie: P2P IE from (Re)Association Request |
| 514 | * @dev_capab: Buffer for returning Device Capability |
| 515 | * @dev_addr: Buffer for returning P2P Device Address |
| 516 | * Returns: P2P Client Info Descriptor or %NULL on failure |
| 517 | * |
| 518 | * This function builds P2P Client Info Descriptor based on the information |
| 519 | * available from (Re)Association Request frame. Group owner can use this to |
| 520 | * build the P2P Group Info attribute for Probe Response frames. |
| 521 | */ |
| 522 | static struct wpabuf * p2p_build_client_info(const u8 *addr, |
| 523 | struct wpabuf *p2p_ie, |
| 524 | u8 *dev_capab, u8 *dev_addr) |
| 525 | { |
| 526 | const u8 *spos; |
| 527 | struct p2p_message msg; |
| 528 | u8 *len_pos; |
| 529 | struct wpabuf *buf; |
| 530 | |
| 531 | if (p2p_ie == NULL) |
| 532 | return NULL; |
| 533 | |
| 534 | os_memset(&msg, 0, sizeof(msg)); |
| 535 | if (p2p_parse_p2p_ie(p2p_ie, &msg) || |
| 536 | msg.capability == NULL || msg.p2p_device_info == NULL) |
| 537 | return NULL; |
| 538 | |
| 539 | buf = wpabuf_alloc(ETH_ALEN + 1 + 1 + msg.p2p_device_info_len); |
| 540 | if (buf == NULL) |
| 541 | return NULL; |
| 542 | |
| 543 | *dev_capab = msg.capability[0]; |
| 544 | os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); |
| 545 | |
| 546 | spos = msg.p2p_device_info; /* P2P Device address */ |
| 547 | |
| 548 | /* P2P Client Info Descriptor */ |
| 549 | /* Length to be set */ |
| 550 | len_pos = wpabuf_put(buf, 1); |
| 551 | /* P2P Device address */ |
| 552 | wpabuf_put_data(buf, spos, ETH_ALEN); |
| 553 | /* P2P Interface address */ |
| 554 | wpabuf_put_data(buf, addr, ETH_ALEN); |
| 555 | /* Device Capability Bitmap */ |
| 556 | wpabuf_put_u8(buf, msg.capability[0]); |
| 557 | /* |
| 558 | * Config Methods, Primary Device Type, Number of Secondary Device |
| 559 | * Types, Secondary Device Type List, Device Name copied from |
| 560 | * Device Info |
| 561 | */ |
| 562 | wpabuf_put_data(buf, spos + ETH_ALEN, |
| 563 | msg.p2p_device_info_len - ETH_ALEN); |
| 564 | |
| 565 | *len_pos = wpabuf_len(buf) - 1; |
| 566 | |
| 567 | |
| 568 | return buf; |
| 569 | } |
| 570 | |
| 571 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 572 | static int p2p_group_remove_member(struct p2p_group *group, const u8 *addr) |
| 573 | { |
| 574 | struct p2p_group_member *m, *prev; |
| 575 | |
| 576 | if (group == NULL) |
| 577 | return 0; |
| 578 | |
| 579 | m = group->members; |
| 580 | prev = NULL; |
| 581 | while (m) { |
| 582 | if (os_memcmp(m->addr, addr, ETH_ALEN) == 0) |
| 583 | break; |
| 584 | prev = m; |
| 585 | m = m->next; |
| 586 | } |
| 587 | |
| 588 | if (m == NULL) |
| 589 | return 0; |
| 590 | |
| 591 | if (prev) |
| 592 | prev->next = m->next; |
| 593 | else |
| 594 | group->members = m->next; |
| 595 | p2p_group_free_member(m); |
| 596 | group->num_members--; |
| 597 | |
| 598 | return 1; |
| 599 | } |
| 600 | |
| 601 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 602 | int p2p_group_notif_assoc(struct p2p_group *group, const u8 *addr, |
| 603 | const u8 *ie, size_t len) |
| 604 | { |
| 605 | struct p2p_group_member *m; |
| 606 | |
| 607 | if (group == NULL) |
| 608 | return -1; |
| 609 | |
Dmitry Shmidt | 2f02319 | 2013-03-12 12:44:17 -0700 | [diff] [blame] | 610 | p2p_add_device(group->p2p, addr, 0, NULL, 0, ie, len, 0); |
| 611 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 612 | m = os_zalloc(sizeof(*m)); |
| 613 | if (m == NULL) |
| 614 | return -1; |
| 615 | os_memcpy(m->addr, addr, ETH_ALEN); |
| 616 | m->p2p_ie = ieee802_11_vendor_ie_concat(ie, len, P2P_IE_VENDOR_TYPE); |
| 617 | if (m->p2p_ie) { |
| 618 | m->client_info = p2p_build_client_info(addr, m->p2p_ie, |
| 619 | &m->dev_capab, |
| 620 | m->dev_addr); |
| 621 | } |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 622 | #ifdef CONFIG_WIFI_DISPLAY |
| 623 | m->wfd_ie = ieee802_11_vendor_ie_concat(ie, len, WFD_IE_VENDOR_TYPE); |
| 624 | #endif /* CONFIG_WIFI_DISPLAY */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 625 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 626 | p2p_group_remove_member(group, addr); |
| 627 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 628 | m->next = group->members; |
| 629 | group->members = m; |
| 630 | group->num_members++; |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 631 | p2p_dbg(group->p2p, "Add client " MACSTR |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 632 | " to group (p2p=%d wfd=%d client_info=%d); num_members=%u/%u", |
| 633 | MAC2STR(addr), m->p2p_ie ? 1 : 0, m->wfd_ie ? 1 : 0, |
| 634 | m->client_info ? 1 : 0, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 635 | group->num_members, group->cfg->max_clients); |
| 636 | if (group->num_members == group->cfg->max_clients) |
| 637 | group->beacon_update = 1; |
| 638 | p2p_group_update_ies(group); |
| 639 | if (group->num_members == 1) |
| 640 | group->cfg->idle_update(group->cfg->cb_ctx, 0); |
| 641 | |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | |
| 646 | struct wpabuf * p2p_group_assoc_resp_ie(struct p2p_group *group, u8 status) |
| 647 | { |
| 648 | struct wpabuf *resp; |
| 649 | u8 *rlen; |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 650 | size_t extra = 0; |
| 651 | |
| 652 | #ifdef CONFIG_WIFI_DISPLAY |
| 653 | if (group->wfd_ie) |
| 654 | extra = wpabuf_len(group->wfd_ie); |
| 655 | #endif /* CONFIG_WIFI_DISPLAY */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 656 | |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 657 | if (group->p2p->vendor_elem && |
| 658 | group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP]) |
| 659 | extra += wpabuf_len(group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP]); |
| 660 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 661 | /* |
| 662 | * (Re)Association Response - P2P IE |
| 663 | * Status attribute (shall be present when association request is |
| 664 | * denied) |
| 665 | * Extended Listen Timing (may be present) |
| 666 | */ |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 667 | resp = wpabuf_alloc(20 + extra); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 668 | if (resp == NULL) |
| 669 | return NULL; |
Dmitry Shmidt | 61d9df3 | 2012-08-29 16:22:06 -0700 | [diff] [blame] | 670 | |
| 671 | #ifdef CONFIG_WIFI_DISPLAY |
| 672 | if (group->wfd_ie) |
| 673 | wpabuf_put_buf(resp, group->wfd_ie); |
| 674 | #endif /* CONFIG_WIFI_DISPLAY */ |
| 675 | |
Dmitry Shmidt | 2e67f06 | 2014-07-16 09:55:28 -0700 | [diff] [blame] | 676 | if (group->p2p->vendor_elem && |
| 677 | group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP]) |
| 678 | wpabuf_put_buf(resp, |
| 679 | group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP]); |
| 680 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 681 | rlen = p2p_buf_add_ie_hdr(resp); |
| 682 | if (status != P2P_SC_SUCCESS) |
| 683 | p2p_buf_add_status(resp, status); |
| 684 | p2p_buf_update_ie_hdr(resp, rlen); |
| 685 | |
| 686 | return resp; |
| 687 | } |
| 688 | |
| 689 | |
| 690 | void p2p_group_notif_disassoc(struct p2p_group *group, const u8 *addr) |
| 691 | { |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 692 | if (p2p_group_remove_member(group, addr)) { |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 693 | p2p_dbg(group->p2p, "Remove client " MACSTR |
| 694 | " from group; num_members=%u/%u", |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 695 | MAC2STR(addr), group->num_members, |
| 696 | group->cfg->max_clients); |
| 697 | if (group->num_members == group->cfg->max_clients - 1) |
| 698 | group->beacon_update = 1; |
| 699 | p2p_group_update_ies(group); |
| 700 | if (group->num_members == 0) |
| 701 | group->cfg->idle_update(group->cfg->cb_ctx, 1); |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | |
| 706 | /** |
| 707 | * p2p_match_dev_type_member - Match client device type with requested type |
| 708 | * @m: Group member |
| 709 | * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) |
| 710 | * Returns: 1 on match, 0 on mismatch |
| 711 | * |
| 712 | * This function can be used to match the Requested Device Type attribute in |
| 713 | * WPS IE with the device types of a group member for deciding whether a GO |
| 714 | * should reply to a Probe Request frame. |
| 715 | */ |
| 716 | static int p2p_match_dev_type_member(struct p2p_group_member *m, |
| 717 | struct wpabuf *wps) |
| 718 | { |
| 719 | const u8 *pos, *end; |
| 720 | struct wps_parse_attr attr; |
| 721 | u8 num_sec; |
| 722 | |
| 723 | if (m->client_info == NULL || wps == NULL) |
| 724 | return 0; |
| 725 | |
| 726 | pos = wpabuf_head(m->client_info); |
| 727 | end = pos + wpabuf_len(m->client_info); |
| 728 | |
| 729 | pos += 1 + 2 * ETH_ALEN + 1 + 2; |
| 730 | if (end - pos < WPS_DEV_TYPE_LEN + 1) |
| 731 | return 0; |
| 732 | |
| 733 | if (wps_parse_msg(wps, &attr)) |
| 734 | return 1; /* assume no Requested Device Type attributes */ |
| 735 | |
| 736 | if (attr.num_req_dev_type == 0) |
| 737 | return 1; /* no Requested Device Type attributes -> match */ |
| 738 | |
| 739 | if (dev_type_list_match(pos, attr.req_dev_type, attr.num_req_dev_type)) |
| 740 | return 1; /* Match with client Primary Device Type */ |
| 741 | |
| 742 | pos += WPS_DEV_TYPE_LEN; |
| 743 | num_sec = *pos++; |
| 744 | if (end - pos < num_sec * WPS_DEV_TYPE_LEN) |
| 745 | return 0; |
| 746 | while (num_sec > 0) { |
| 747 | num_sec--; |
| 748 | if (dev_type_list_match(pos, attr.req_dev_type, |
| 749 | attr.num_req_dev_type)) |
| 750 | return 1; /* Match with client Secondary Device Type */ |
| 751 | pos += WPS_DEV_TYPE_LEN; |
| 752 | } |
| 753 | |
| 754 | /* No matching device type found */ |
| 755 | return 0; |
| 756 | } |
| 757 | |
| 758 | |
| 759 | int p2p_group_match_dev_type(struct p2p_group *group, struct wpabuf *wps) |
| 760 | { |
| 761 | struct p2p_group_member *m; |
| 762 | |
| 763 | if (p2p_match_dev_type(group->p2p, wps)) |
| 764 | return 1; /* Match with own device type */ |
| 765 | |
| 766 | for (m = group->members; m; m = m->next) { |
| 767 | if (p2p_match_dev_type_member(m, wps)) |
| 768 | return 1; /* Match with group client device type */ |
| 769 | } |
| 770 | |
| 771 | /* No match with Requested Device Type */ |
| 772 | return 0; |
| 773 | } |
| 774 | |
| 775 | |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 776 | int p2p_group_match_dev_id(struct p2p_group *group, struct wpabuf *p2p) |
| 777 | { |
| 778 | struct p2p_group_member *m; |
| 779 | struct p2p_message msg; |
| 780 | |
| 781 | os_memset(&msg, 0, sizeof(msg)); |
| 782 | if (p2p_parse_p2p_ie(p2p, &msg)) |
| 783 | return 1; /* Failed to parse - assume no filter on Device ID */ |
| 784 | |
| 785 | if (!msg.device_id) |
| 786 | return 1; /* No filter on Device ID */ |
| 787 | |
| 788 | if (os_memcmp(msg.device_id, group->p2p->cfg->dev_addr, ETH_ALEN) == 0) |
| 789 | return 1; /* Match with our P2P Device Address */ |
| 790 | |
| 791 | for (m = group->members; m; m = m->next) { |
| 792 | if (os_memcmp(msg.device_id, m->dev_addr, ETH_ALEN) == 0) |
| 793 | return 1; /* Match with group client P2P Device Address */ |
| 794 | } |
| 795 | |
| 796 | /* No match with Device ID */ |
| 797 | return 0; |
| 798 | } |
| 799 | |
| 800 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 801 | void p2p_group_notif_formation_done(struct p2p_group *group) |
| 802 | { |
| 803 | if (group == NULL) |
| 804 | return; |
| 805 | group->group_formation = 0; |
| 806 | group->beacon_update = 1; |
| 807 | p2p_group_update_ies(group); |
| 808 | } |
| 809 | |
| 810 | |
| 811 | int p2p_group_notif_noa(struct p2p_group *group, const u8 *noa, |
| 812 | size_t noa_len) |
| 813 | { |
| 814 | if (noa == NULL) { |
| 815 | wpabuf_free(group->noa); |
| 816 | group->noa = NULL; |
| 817 | } else { |
| 818 | if (group->noa) { |
| 819 | if (wpabuf_size(group->noa) >= noa_len) { |
Dmitry Shmidt | fc41cad | 2011-09-28 13:29:53 -0700 | [diff] [blame] | 820 | group->noa->used = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 821 | wpabuf_put_data(group->noa, noa, noa_len); |
| 822 | } else { |
| 823 | wpabuf_free(group->noa); |
| 824 | group->noa = NULL; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | if (!group->noa) { |
| 829 | group->noa = wpabuf_alloc_copy(noa, noa_len); |
| 830 | if (group->noa == NULL) |
| 831 | return -1; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | group->beacon_update = 1; |
| 836 | p2p_group_update_ies(group); |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | |
| 841 | static struct p2p_group_member * p2p_group_get_client(struct p2p_group *group, |
| 842 | const u8 *dev_id) |
| 843 | { |
| 844 | struct p2p_group_member *m; |
| 845 | |
| 846 | for (m = group->members; m; m = m->next) { |
| 847 | if (os_memcmp(dev_id, m->dev_addr, ETH_ALEN) == 0) |
| 848 | return m; |
| 849 | } |
| 850 | |
| 851 | return NULL; |
| 852 | } |
| 853 | |
| 854 | |
Dmitry Shmidt | 849734c | 2016-05-27 09:59:01 -0700 | [diff] [blame] | 855 | const u8 * p2p_group_get_client_interface_addr(struct p2p_group *group, |
| 856 | const u8 *dev_addr) |
| 857 | { |
| 858 | struct p2p_group_member *m; |
| 859 | |
| 860 | if (!group) |
| 861 | return NULL; |
| 862 | m = p2p_group_get_client(group, dev_addr); |
| 863 | if (m) |
| 864 | return m->addr; |
| 865 | return NULL; |
| 866 | } |
| 867 | |
| 868 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 869 | static struct p2p_group_member * p2p_group_get_client_iface( |
| 870 | struct p2p_group *group, const u8 *interface_addr) |
| 871 | { |
| 872 | struct p2p_group_member *m; |
| 873 | |
| 874 | for (m = group->members; m; m = m->next) { |
| 875 | if (os_memcmp(interface_addr, m->addr, ETH_ALEN) == 0) |
| 876 | return m; |
| 877 | } |
| 878 | |
| 879 | return NULL; |
| 880 | } |
| 881 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 882 | |
| 883 | const u8 * p2p_group_get_dev_addr(struct p2p_group *group, const u8 *addr) |
Dmitry Shmidt | dca3979 | 2011-09-06 11:17:33 -0700 | [diff] [blame] | 884 | { |
| 885 | struct p2p_group_member *m; |
| 886 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 887 | if (group == NULL) |
Dmitry Shmidt | dca3979 | 2011-09-06 11:17:33 -0700 | [diff] [blame] | 888 | return NULL; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 889 | m = p2p_group_get_client_iface(group, addr); |
| 890 | if (m && !is_zero_ether_addr(m->dev_addr)) |
| 891 | return m->dev_addr; |
| 892 | return NULL; |
Dmitry Shmidt | dca3979 | 2011-09-06 11:17:33 -0700 | [diff] [blame] | 893 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 894 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 895 | |
| 896 | static struct wpabuf * p2p_build_go_disc_req(void) |
| 897 | { |
| 898 | struct wpabuf *buf; |
| 899 | |
| 900 | buf = wpabuf_alloc(100); |
| 901 | if (buf == NULL) |
| 902 | return NULL; |
| 903 | |
| 904 | p2p_buf_add_action_hdr(buf, P2P_GO_DISC_REQ, 0); |
| 905 | |
| 906 | return buf; |
| 907 | } |
| 908 | |
| 909 | |
| 910 | int p2p_group_go_discover(struct p2p_group *group, const u8 *dev_id, |
| 911 | const u8 *searching_dev, int rx_freq) |
| 912 | { |
| 913 | struct p2p_group_member *m; |
| 914 | struct wpabuf *req; |
| 915 | struct p2p_data *p2p = group->p2p; |
| 916 | int freq; |
| 917 | |
| 918 | m = p2p_group_get_client(group, dev_id); |
| 919 | if (m == NULL || m->client_info == NULL) { |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 920 | p2p_dbg(group->p2p, "Requested client was not in this group " |
| 921 | MACSTR, MAC2STR(group->cfg->interface_addr)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 922 | return -1; |
| 923 | } |
| 924 | |
| 925 | if (!(m->dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 926 | p2p_dbg(group->p2p, "Requested client does not support client discoverability"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 927 | return -1; |
| 928 | } |
| 929 | |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 930 | p2p_dbg(group->p2p, "Schedule GO Discoverability Request to be sent to " |
| 931 | MACSTR, MAC2STR(dev_id)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 932 | |
| 933 | req = p2p_build_go_disc_req(); |
| 934 | if (req == NULL) |
| 935 | return -1; |
| 936 | |
| 937 | /* TODO: Should really use group operating frequency here */ |
| 938 | freq = rx_freq; |
| 939 | |
| 940 | p2p->pending_action_state = P2P_PENDING_GO_DISC_REQ; |
| 941 | if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, m->addr, |
| 942 | group->cfg->interface_addr, |
| 943 | group->cfg->interface_addr, |
Hai Shalom | 021b0b5 | 2019-04-10 11:17:58 -0700 | [diff] [blame] | 944 | wpabuf_head(req), wpabuf_len(req), 200, NULL) |
| 945 | < 0) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 946 | { |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 947 | p2p_dbg(p2p, "Failed to send Action frame"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | wpabuf_free(req); |
| 951 | |
| 952 | return 0; |
| 953 | } |
| 954 | |
| 955 | |
| 956 | const u8 * p2p_group_get_interface_addr(struct p2p_group *group) |
| 957 | { |
| 958 | return group->cfg->interface_addr; |
| 959 | } |
| 960 | |
| 961 | |
| 962 | u8 p2p_group_presence_req(struct p2p_group *group, |
| 963 | const u8 *client_interface_addr, |
| 964 | const u8 *noa, size_t noa_len) |
| 965 | { |
| 966 | struct p2p_group_member *m; |
| 967 | u8 curr_noa[50]; |
| 968 | int curr_noa_len; |
| 969 | |
| 970 | m = p2p_group_get_client_iface(group, client_interface_addr); |
| 971 | if (m == NULL || m->client_info == NULL) { |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 972 | p2p_dbg(group->p2p, "Client was not in this group"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 973 | return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; |
| 974 | } |
| 975 | |
| 976 | wpa_hexdump(MSG_DEBUG, "P2P: Presence Request NoA", noa, noa_len); |
| 977 | |
| 978 | if (group->p2p->cfg->get_noa) |
| 979 | curr_noa_len = group->p2p->cfg->get_noa( |
| 980 | group->p2p->cfg->cb_ctx, group->cfg->interface_addr, |
| 981 | curr_noa, sizeof(curr_noa)); |
| 982 | else |
| 983 | curr_noa_len = -1; |
| 984 | if (curr_noa_len < 0) |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 985 | p2p_dbg(group->p2p, "Failed to fetch current NoA"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 986 | else if (curr_noa_len == 0) |
Dmitry Shmidt | b6e9aaf | 2013-05-20 14:49:44 -0700 | [diff] [blame] | 987 | p2p_dbg(group->p2p, "No NoA being advertized"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 988 | else |
| 989 | wpa_hexdump(MSG_DEBUG, "P2P: Current NoA", curr_noa, |
| 990 | curr_noa_len); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 991 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 992 | /* TODO: properly process request and store copy */ |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 993 | if (curr_noa_len > 0 || curr_noa_len == -1) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 994 | return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 995 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 996 | return P2P_SC_SUCCESS; |
| 997 | } |
| 998 | |
| 999 | |
| 1000 | unsigned int p2p_get_group_num_members(struct p2p_group *group) |
| 1001 | { |
Dmitry Shmidt | aff761d | 2015-02-06 10:50:36 -0800 | [diff] [blame] | 1002 | if (!group) |
| 1003 | return 0; |
| 1004 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1005 | return group->num_members; |
| 1006 | } |
| 1007 | |
| 1008 | |
Dmitry Shmidt | aff761d | 2015-02-06 10:50:36 -0800 | [diff] [blame] | 1009 | int p2p_client_limit_reached(struct p2p_group *group) |
| 1010 | { |
| 1011 | if (!group || !group->cfg) |
| 1012 | return 1; |
| 1013 | |
| 1014 | return group->num_members >= group->cfg->max_clients; |
| 1015 | } |
| 1016 | |
| 1017 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1018 | const u8 * p2p_iterate_group_members(struct p2p_group *group, void **next) |
| 1019 | { |
| 1020 | struct p2p_group_member *iter = *next; |
| 1021 | |
| 1022 | if (!iter) |
| 1023 | iter = group->members; |
| 1024 | else |
| 1025 | iter = iter->next; |
| 1026 | |
| 1027 | *next = iter; |
| 1028 | |
| 1029 | if (!iter) |
| 1030 | return NULL; |
| 1031 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1032 | return iter->dev_addr; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1033 | } |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 1034 | |
| 1035 | |
| 1036 | int p2p_group_is_client_connected(struct p2p_group *group, const u8 *dev_addr) |
| 1037 | { |
| 1038 | struct p2p_group_member *m; |
| 1039 | |
| 1040 | for (m = group->members; m; m = m->next) { |
| 1041 | if (os_memcmp(m->dev_addr, dev_addr, ETH_ALEN) == 0) |
| 1042 | return 1; |
| 1043 | } |
| 1044 | |
| 1045 | return 0; |
| 1046 | } |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 1047 | |
| 1048 | |
| 1049 | int p2p_group_is_group_id_match(struct p2p_group *group, const u8 *group_id, |
| 1050 | size_t group_id_len) |
| 1051 | { |
| 1052 | if (group_id_len != ETH_ALEN + group->cfg->ssid_len) |
| 1053 | return 0; |
| 1054 | if (os_memcmp(group_id, group->p2p->cfg->dev_addr, ETH_ALEN) != 0) |
| 1055 | return 0; |
| 1056 | return os_memcmp(group_id + ETH_ALEN, group->cfg->ssid, |
| 1057 | group->cfg->ssid_len) == 0; |
| 1058 | } |
Dmitry Shmidt | b96dad4 | 2013-11-05 10:07:29 -0800 | [diff] [blame] | 1059 | |
| 1060 | |
| 1061 | void p2p_group_force_beacon_update_ies(struct p2p_group *group) |
| 1062 | { |
| 1063 | group->beacon_update = 1; |
| 1064 | p2p_group_update_ies(group); |
| 1065 | } |
Dmitry Shmidt | cf32e60 | 2014-01-28 10:57:39 -0800 | [diff] [blame] | 1066 | |
| 1067 | |
| 1068 | int p2p_group_get_freq(struct p2p_group *group) |
| 1069 | { |
| 1070 | return group->cfg->freq; |
| 1071 | } |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1072 | |
| 1073 | |
| 1074 | const struct p2p_group_config * p2p_group_get_config(struct p2p_group *group) |
| 1075 | { |
| 1076 | return group->cfg; |
| 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | void p2p_loop_on_all_groups(struct p2p_data *p2p, |
| 1081 | int (*group_callback)(struct p2p_group *group, |
| 1082 | void *user_data), |
| 1083 | void *user_data) |
| 1084 | { |
| 1085 | unsigned int i; |
| 1086 | |
| 1087 | for (i = 0; i < p2p->num_groups; i++) { |
| 1088 | if (!group_callback(p2p->groups[i], user_data)) |
| 1089 | break; |
| 1090 | } |
| 1091 | } |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 1092 | |
| 1093 | |
| 1094 | int p2p_group_get_common_freqs(struct p2p_group *group, int *common_freqs, |
| 1095 | unsigned int *num) |
| 1096 | |
| 1097 | { |
| 1098 | struct p2p_channels intersect, res; |
| 1099 | struct p2p_group_member *m; |
| 1100 | |
| 1101 | if (!group || !common_freqs || !num) |
| 1102 | return -1; |
| 1103 | |
| 1104 | os_memset(&intersect, 0, sizeof(intersect)); |
| 1105 | os_memset(&res, 0, sizeof(res)); |
| 1106 | |
| 1107 | p2p_channels_union(&intersect, &group->p2p->cfg->channels, |
| 1108 | &intersect); |
| 1109 | |
| 1110 | p2p_channels_dump(group->p2p, |
| 1111 | "Group common freqs before iterating members", |
| 1112 | &intersect); |
| 1113 | |
| 1114 | for (m = group->members; m; m = m->next) { |
| 1115 | struct p2p_device *dev; |
| 1116 | |
| 1117 | dev = p2p_get_device(group->p2p, m->dev_addr); |
Dmitry Shmidt | aca489e | 2016-09-28 15:44:14 -0700 | [diff] [blame] | 1118 | if (!dev || dev->channels.reg_classes == 0) |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 1119 | continue; |
| 1120 | |
| 1121 | p2p_channels_intersect(&intersect, &dev->channels, &res); |
| 1122 | intersect = res; |
| 1123 | } |
| 1124 | |
| 1125 | p2p_channels_dump(group->p2p, "Group common channels", &intersect); |
| 1126 | |
| 1127 | os_memset(common_freqs, 0, *num * sizeof(int)); |
| 1128 | *num = p2p_channels_to_freqs(&intersect, common_freqs, *num); |
| 1129 | |
| 1130 | return 0; |
| 1131 | } |