2 * Wi-Fi Direct - P2P group operations
3 * Copyright (c) 2009-2010, Atheros Communications
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "common/ieee802_11_defs.h"
13 #include "common/ieee802_11_common.h"
14 #include "common/wpa_ctrl.h"
15 #include "wps/wps_defs.h"
16 #include "wps/wps_i.h"
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;
26 struct wpabuf *wfd_ie;
27 struct wpabuf *client_info;
32 * struct p2p_group - Internal P2P module per-group data
36 struct p2p_group_config *cfg;
37 struct p2p_group_member *members;
38 unsigned int num_members;
42 struct wpabuf *wfd_ie;
46 struct p2p_group * p2p_group_init(struct p2p_data *p2p,
47 struct p2p_group_config *config)
49 struct p2p_group *group, **groups;
51 group = os_zalloc(sizeof(*group));
55 groups = os_realloc_array(p2p->groups, p2p->num_groups + 1,
56 sizeof(struct p2p_group *));
61 groups[p2p->num_groups++] = group;
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);
75 static void p2p_group_free_member(struct p2p_group_member *m)
77 wpabuf_free(m->wfd_ie);
78 wpabuf_free(m->p2p_ie);
79 wpabuf_free(m->client_info);
84 static void p2p_group_free_members(struct p2p_group *group)
86 struct p2p_group_member *m, *prev;
88 group->members = NULL;
89 group->num_members = 0;
93 p2p_group_free_member(prev);
98 void p2p_group_deinit(struct p2p_group *group)
101 struct p2p_data *p2p;
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];
119 p2p_group_free_members(group);
121 wpabuf_free(group->noa);
122 wpabuf_free(group->wfd_ie);
127 static void p2p_client_info(struct wpabuf *ie, struct p2p_group_member *m)
129 if (m->client_info == NULL)
131 if (wpabuf_tailroom(ie) < wpabuf_len(m->client_info) + 1)
133 wpabuf_put_buf(ie, m->client_info);
137 static void p2p_group_add_common_ies(struct p2p_group *group,
140 u8 dev_capab = group->p2p->dev_capab, group_capab = 0;
143 dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
144 group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
145 if (group->cfg->persistent_group) {
146 group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP;
147 if (group->cfg->persistent_group == 2)
148 group_capab |= P2P_GROUP_CAPAB_PERSISTENT_RECONN;
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;
158 if (group->cfg->ip_addr_alloc)
159 group_capab |= P2P_GROUP_CAPAB_IP_ADDR_ALLOCATION;
160 p2p_buf_add_capability(ie, dev_capab, group_capab);
164 static void p2p_group_add_noa(struct wpabuf *ie, struct wpabuf *noa)
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);
175 static struct wpabuf * p2p_group_encaps_probe_resp(struct wpabuf *subelems)
181 if (subelems == NULL)
184 len = wpabuf_len(subelems) + 100;
186 ie = wpabuf_alloc(len);
190 pos = wpabuf_head(subelems);
191 end = pos + wpabuf_len(subelems);
194 size_t frag_len = end - pos;
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);
208 static struct wpabuf * p2p_group_build_beacon_ie(struct p2p_group *group)
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 */
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]);
223 ie = wpabuf_alloc(257 + extra);
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 */
232 if (group->p2p->vendor_elem &&
233 group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO])
235 group->p2p->vendor_elem[VENDOR_ELEM_BEACON_P2P_GO]);
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);
240 p2p_group_add_noa(ie, group->noa);
241 p2p_buf_update_ie_hdr(ie, len);
247 #ifdef CONFIG_WIFI_DISPLAY
249 struct wpabuf * p2p_group_get_wfd_ie(struct p2p_group *g)
255 struct wpabuf * wifi_display_encaps(struct wpabuf *subelems)
260 if (subelems == NULL)
263 ie = wpabuf_alloc(wpabuf_len(subelems) + 100);
267 pos = wpabuf_head(subelems);
268 end = pos + wpabuf_len(subelems);
271 size_t frag_len = end - pos;
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);
285 static int wifi_display_add_dev_info_descr(struct wpabuf *buf,
286 struct p2p_group_member *m)
289 const u8 *dev_info = NULL;
290 const u8 *assoc_bssid = NULL;
291 const u8 *coupled_sink = NULL;
292 u8 zero_addr[ETH_ALEN];
294 if (m->wfd_ie == NULL)
297 os_memset(zero_addr, 0, ETH_ALEN);
298 pos = wpabuf_head_u8(m->wfd_ie);
299 end = pos + wpabuf_len(m->wfd_ie);
300 while (end - pos >= 3) {
305 len = WPA_GET_BE16(pos);
311 case WFD_SUBELEM_DEVICE_INFO:
316 case WFD_SUBELEM_ASSOCIATED_BSSID:
321 case WFD_SUBELEM_COUPLED_SINK:
322 if (len < 1 + ETH_ALEN)
331 if (dev_info == NULL)
334 wpabuf_put_u8(buf, 23);
335 wpabuf_put_data(buf, m->dev_addr, ETH_ALEN);
337 wpabuf_put_data(buf, assoc_bssid, ETH_ALEN);
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 */
343 wpabuf_put_data(buf, coupled_sink, 1 + ETH_ALEN);
345 wpabuf_put_u8(buf, 0);
346 wpabuf_put_data(buf, zero_addr, ETH_ALEN);
353 static struct wpabuf *
354 wifi_display_build_go_ie(struct p2p_group *group)
356 struct wpabuf *wfd_subelems, *wfd_ie;
357 struct p2p_group_member *m;
359 unsigned int count = 0;
361 if (!group->p2p->wfd_ie_probe_resp)
364 wfd_subelems = wpabuf_alloc(wpabuf_len(group->p2p->wfd_ie_probe_resp) +
365 group->num_members * 24 + 100);
366 if (wfd_subelems == NULL)
368 if (group->p2p->wfd_dev_info)
369 wpabuf_put_buf(wfd_subelems, group->p2p->wfd_dev_info);
370 if (group->p2p->wfd_r2_dev_info)
371 wpabuf_put_buf(wfd_subelems, group->p2p->wfd_r2_dev_info);
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);
379 /* Build WFD Session Info */
380 wpabuf_put_u8(wfd_subelems, WFD_SUBELEM_SESSION_INFO);
381 len = wpabuf_put(wfd_subelems, 2);
384 if (wifi_display_add_dev_info_descr(wfd_subelems, m))
390 /* No Wi-Fi Display clients - do not include subelement */
391 wfd_subelems->used -= 3;
393 WPA_PUT_BE16(len, (u8 *) wpabuf_put(wfd_subelems, 0) - len -
395 p2p_dbg(group->p2p, "WFD: WFD Session Info: %u descriptors",
399 wfd_ie = wifi_display_encaps(wfd_subelems);
400 wpabuf_free(wfd_subelems);
405 static void wifi_display_group_update(struct p2p_group *group)
407 wpabuf_free(group->wfd_ie);
408 group->wfd_ie = wifi_display_build_go_ie(group);
411 #endif /* CONFIG_WIFI_DISPLAY */
414 void p2p_buf_add_group_info(struct p2p_group *group, struct wpabuf *buf,
419 struct p2p_group_member *m;
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);
428 if (max_clients >= 0 && count >= max_clients)
431 WPA_PUT_LE16(group_info + 1,
432 (u8 *) wpabuf_put(buf, 0) - group_info - 3);
436 void p2p_group_buf_add_id(struct p2p_group *group, struct wpabuf *buf)
438 p2p_buf_add_group_id(buf, group->p2p->cfg->dev_addr, group->cfg->ssid,
439 group->cfg->ssid_len);
443 static struct wpabuf * p2p_group_build_probe_resp_ie(struct p2p_group *group)
445 struct wpabuf *p2p_subelems, *ie;
447 p2p_subelems = wpabuf_alloc(500);
448 if (p2p_subelems == NULL)
451 p2p_group_add_common_ies(group, p2p_subelems);
452 p2p_group_add_noa(p2p_subelems, group->noa);
454 /* P2P Device Info */
455 p2p_buf_add_device_info(p2p_subelems, group->p2p, NULL);
457 /* P2P Group Info: Only when at least one P2P Client is connected */
459 p2p_buf_add_group_info(group, p2p_subelems, -1);
461 ie = p2p_group_encaps_probe_resp(p2p_subelems);
462 wpabuf_free(p2p_subelems);
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);
471 #ifdef CONFIG_WIFI_DISPLAY
473 struct wpabuf *wfd = wpabuf_dup(group->wfd_ie);
474 ie = wpabuf_concat(wfd, ie);
476 #endif /* CONFIG_WIFI_DISPLAY */
482 void p2p_group_update_ies(struct p2p_group *group)
484 struct wpabuf *beacon_ie;
485 struct wpabuf *probe_resp_ie;
487 #ifdef CONFIG_WIFI_DISPLAY
488 wifi_display_group_update(group);
489 #endif /* CONFIG_WIFI_DISPLAY */
491 probe_resp_ie = p2p_group_build_probe_resp_ie(group);
492 if (probe_resp_ie == NULL)
494 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Probe Response P2P IE",
497 if (group->beacon_update) {
498 beacon_ie = p2p_group_build_beacon_ie(group);
500 group->beacon_update = 0;
501 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Beacon P2P IE",
506 group->cfg->ie_update(group->cfg->cb_ctx, beacon_ie, probe_resp_ie);
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
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.
522 static struct wpabuf * p2p_build_client_info(const u8 *addr,
523 struct wpabuf *p2p_ie,
524 u8 *dev_capab, u8 *dev_addr)
527 struct p2p_message msg;
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)
539 buf = wpabuf_alloc(ETH_ALEN + 1 + 1 + msg.p2p_device_info_len);
543 *dev_capab = msg.capability[0];
544 os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
546 spos = msg.p2p_device_info; /* P2P Device address */
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]);
558 * Config Methods, Primary Device Type, Number of Secondary Device
559 * Types, Secondary Device Type List, Device Name copied from
562 wpabuf_put_data(buf, spos + ETH_ALEN,
563 msg.p2p_device_info_len - ETH_ALEN);
565 *len_pos = wpabuf_len(buf) - 1;
572 static int p2p_group_remove_member(struct p2p_group *group, const u8 *addr)
574 struct p2p_group_member *m, *prev;
582 if (os_memcmp(m->addr, addr, ETH_ALEN) == 0)
592 prev->next = m->next;
594 group->members = m->next;
595 p2p_group_free_member(m);
596 group->num_members--;
602 int p2p_group_notif_assoc(struct p2p_group *group, const u8 *addr,
603 const u8 *ie, size_t len)
605 struct p2p_group_member *m;
610 p2p_add_device(group->p2p, addr, 0, NULL, 0, ie, len, 0);
612 m = os_zalloc(sizeof(*m));
615 os_memcpy(m->addr, addr, ETH_ALEN);
616 m->p2p_ie = ieee802_11_vendor_ie_concat(ie, len, P2P_IE_VENDOR_TYPE);
618 m->client_info = p2p_build_client_info(addr, m->p2p_ie,
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 */
626 p2p_group_remove_member(group, addr);
628 m->next = group->members;
630 group->num_members++;
631 p2p_dbg(group->p2p, "Add client " MACSTR
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,
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);
646 struct wpabuf * p2p_group_assoc_resp_ie(struct p2p_group *group, u8 status)
652 #ifdef CONFIG_WIFI_DISPLAY
654 extra = wpabuf_len(group->wfd_ie);
655 #endif /* CONFIG_WIFI_DISPLAY */
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]);
662 * (Re)Association Response - P2P IE
663 * Status attribute (shall be present when association request is
665 * Extended Listen Timing (may be present)
667 resp = wpabuf_alloc(20 + extra);
671 #ifdef CONFIG_WIFI_DISPLAY
673 wpabuf_put_buf(resp, group->wfd_ie);
674 #endif /* CONFIG_WIFI_DISPLAY */
676 if (group->p2p->vendor_elem &&
677 group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP])
679 group->p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_RESP]);
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);
690 void p2p_group_notif_disassoc(struct p2p_group *group, const u8 *addr)
692 if (p2p_group_remove_member(group, addr)) {
693 p2p_dbg(group->p2p, "Remove client " MACSTR
694 " from group; num_members=%u/%u",
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);
707 * p2p_match_dev_type_member - Match client device type with requested type
709 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
710 * Returns: 1 on match, 0 on mismatch
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.
716 static int p2p_match_dev_type_member(struct p2p_group_member *m,
720 struct wps_parse_attr attr;
723 if (m->client_info == NULL || wps == NULL)
726 pos = wpabuf_head(m->client_info);
727 end = pos + wpabuf_len(m->client_info);
729 pos += 1 + 2 * ETH_ALEN + 1 + 2;
730 if (end - pos < WPS_DEV_TYPE_LEN + 1)
733 if (wps_parse_msg(wps, &attr))
734 return 1; /* assume no Requested Device Type attributes */
736 if (attr.num_req_dev_type == 0)
737 return 1; /* no Requested Device Type attributes -> match */
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 */
742 pos += WPS_DEV_TYPE_LEN;
744 if (end - pos < num_sec * WPS_DEV_TYPE_LEN)
746 while (num_sec > 0) {
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;
754 /* No matching device type found */
759 int p2p_group_match_dev_type(struct p2p_group *group, struct wpabuf *wps)
761 struct p2p_group_member *m;
763 if (p2p_match_dev_type(group->p2p, wps))
764 return 1; /* Match with own device type */
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 */
771 /* No match with Requested Device Type */
776 int p2p_group_match_dev_id(struct p2p_group *group, struct wpabuf *p2p)
778 struct p2p_group_member *m;
779 struct p2p_message msg;
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 */
786 return 1; /* No filter on Device ID */
788 if (os_memcmp(msg.device_id, group->p2p->cfg->dev_addr, ETH_ALEN) == 0)
789 return 1; /* Match with our P2P Device Address */
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 */
796 /* No match with Device ID */
801 void p2p_group_notif_formation_done(struct p2p_group *group)
805 group->group_formation = 0;
806 group->beacon_update = 1;
807 p2p_group_update_ies(group);
811 int p2p_group_notif_noa(struct p2p_group *group, const u8 *noa,
815 wpabuf_free(group->noa);
819 if (wpabuf_size(group->noa) >= noa_len) {
820 group->noa->used = 0;
821 wpabuf_put_data(group->noa, noa, noa_len);
823 wpabuf_free(group->noa);
829 group->noa = wpabuf_alloc_copy(noa, noa_len);
830 if (group->noa == NULL)
835 group->beacon_update = 1;
836 p2p_group_update_ies(group);
841 static struct p2p_group_member * p2p_group_get_client(struct p2p_group *group,
844 struct p2p_group_member *m;
846 for (m = group->members; m; m = m->next) {
847 if (os_memcmp(dev_id, m->dev_addr, ETH_ALEN) == 0)
855 const u8 * p2p_group_get_client_interface_addr(struct p2p_group *group,
858 struct p2p_group_member *m;
862 m = p2p_group_get_client(group, dev_addr);
869 static struct p2p_group_member * p2p_group_get_client_iface(
870 struct p2p_group *group, const u8 *interface_addr)
872 struct p2p_group_member *m;
874 for (m = group->members; m; m = m->next) {
875 if (os_memcmp(interface_addr, m->addr, ETH_ALEN) == 0)
883 const u8 * p2p_group_get_dev_addr(struct p2p_group *group, const u8 *addr)
885 struct p2p_group_member *m;
889 m = p2p_group_get_client_iface(group, addr);
890 if (m && !is_zero_ether_addr(m->dev_addr))
896 static struct wpabuf * p2p_build_go_disc_req(void)
900 buf = wpabuf_alloc(100);
904 p2p_buf_add_action_hdr(buf, P2P_GO_DISC_REQ, 0);
910 int p2p_group_go_discover(struct p2p_group *group, const u8 *dev_id,
911 const u8 *searching_dev, int rx_freq)
913 struct p2p_group_member *m;
915 struct p2p_data *p2p = group->p2p;
918 m = p2p_group_get_client(group, dev_id);
919 if (m == NULL || m->client_info == NULL) {
920 p2p_dbg(group->p2p, "Requested client was not in this group "
921 MACSTR, MAC2STR(group->cfg->interface_addr));
925 if (!(m->dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
926 p2p_dbg(group->p2p, "Requested client does not support client discoverability");
930 p2p_dbg(group->p2p, "Schedule GO Discoverability Request to be sent to "
931 MACSTR, MAC2STR(dev_id));
933 req = p2p_build_go_disc_req();
937 /* TODO: Should really use group operating frequency here */
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,
944 wpabuf_head(req), wpabuf_len(req), 200, NULL)
947 p2p_dbg(p2p, "Failed to send Action frame");
956 const u8 * p2p_group_get_interface_addr(struct p2p_group *group)
958 return group->cfg->interface_addr;
962 u8 p2p_group_presence_req(struct p2p_group *group,
963 const u8 *client_interface_addr,
964 const u8 *noa, size_t noa_len)
966 struct p2p_group_member *m;
970 m = p2p_group_get_client_iface(group, client_interface_addr);
971 if (m == NULL || m->client_info == NULL) {
972 p2p_dbg(group->p2p, "Client was not in this group");
973 return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
976 wpa_hexdump(MSG_DEBUG, "P2P: Presence Request NoA", noa, noa_len);
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));
984 if (curr_noa_len < 0)
985 p2p_dbg(group->p2p, "Failed to fetch current NoA");
986 else if (curr_noa_len == 0)
987 p2p_dbg(group->p2p, "No NoA being advertized");
989 wpa_hexdump(MSG_DEBUG, "P2P: Current NoA", curr_noa,
992 /* TODO: properly process request and store copy */
993 if (curr_noa_len > 0 || curr_noa_len == -1)
994 return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE;
996 return P2P_SC_SUCCESS;
1000 unsigned int p2p_get_group_num_members(struct p2p_group *group)
1005 return group->num_members;
1009 int p2p_client_limit_reached(struct p2p_group *group)
1011 if (!group || !group->cfg)
1014 return group->num_members >= group->cfg->max_clients;
1018 const u8 * p2p_iterate_group_members(struct p2p_group *group, void **next)
1020 struct p2p_group_member *iter = *next;
1023 iter = group->members;
1032 return iter->dev_addr;
1036 int p2p_group_is_client_connected(struct p2p_group *group, const u8 *dev_addr)
1038 struct p2p_group_member *m;
1040 for (m = group->members; m; m = m->next) {
1041 if (os_memcmp(m->dev_addr, dev_addr, ETH_ALEN) == 0)
1049 int p2p_group_is_group_id_match(struct p2p_group *group, const u8 *group_id,
1050 size_t group_id_len)
1052 if (group_id_len != ETH_ALEN + group->cfg->ssid_len)
1054 if (os_memcmp(group_id, group->p2p->cfg->dev_addr, ETH_ALEN) != 0)
1056 return os_memcmp(group_id + ETH_ALEN, group->cfg->ssid,
1057 group->cfg->ssid_len) == 0;
1061 void p2p_group_force_beacon_update_ies(struct p2p_group *group)
1063 group->beacon_update = 1;
1064 p2p_group_update_ies(group);
1068 int p2p_group_get_freq(struct p2p_group *group)
1070 return group->cfg->freq;
1074 const struct p2p_group_config * p2p_group_get_config(struct p2p_group *group)
1080 void p2p_loop_on_all_groups(struct p2p_data *p2p,
1081 int (*group_callback)(struct p2p_group *group,
1087 for (i = 0; i < p2p->num_groups; i++) {
1088 if (!group_callback(p2p->groups[i], user_data))
1094 int p2p_group_get_common_freqs(struct p2p_group *group, int *common_freqs,
1098 struct p2p_channels intersect, res;
1099 struct p2p_group_member *m;
1101 if (!group || !common_freqs || !num)
1104 os_memset(&intersect, 0, sizeof(intersect));
1105 os_memset(&res, 0, sizeof(res));
1107 p2p_channels_union(&intersect, &group->p2p->cfg->channels,
1110 p2p_channels_dump(group->p2p,
1111 "Group common freqs before iterating members",
1114 for (m = group->members; m; m = m->next) {
1115 struct p2p_device *dev;
1117 dev = p2p_get_device(group->p2p, m->dev_addr);
1118 if (!dev || dev->channels.reg_classes == 0)
1121 p2p_channels_intersect(&intersect, &dev->channels, &res);
1125 p2p_channels_dump(group->p2p, "Group common channels", &intersect);
1127 os_memset(common_freqs, 0, *num * sizeof(int));
1128 *num = p2p_channels_to_freqs(&intersect, common_freqs, *num);