| /* |
| * Wi-Fi Direct - P2P group operations |
| * Copyright (c) 2009-2010, Atheros Communications |
| * |
| * This software may be distributed under the terms of the BSD license. |
| * See README for more details. |
| */ |
| |
| #include "includes.h" |
| |
| #include "common.h" |
| #include "common/ieee802_11_defs.h" |
| #include "common/ieee802_11_common.h" |
| #include "wps/wps_defs.h" |
| #include "wps/wps_i.h" |
| #include "p2p_i.h" |
| #include "p2p.h" |
| |
| |
| struct p2p_group_member { |
| struct p2p_group_member *next; |
| u8 addr[ETH_ALEN]; /* P2P Interface Address */ |
| u8 dev_addr[ETH_ALEN]; /* P2P Device Address */ |
| struct wpabuf *p2p_ie; |
| struct wpabuf *wfd_ie; |
| struct wpabuf *client_info; |
| u8 dev_capab; |
| }; |
| |
| /** |
| * struct p2p_group - Internal P2P module per-group data |
| */ |
| struct p2p_group { |
| struct p2p_data *p2p; |
| struct p2p_group_config *cfg; |
| struct p2p_group_member *members; |
| unsigned int num_members; |
| int group_formation; |
| int beacon_update; |
| struct wpabuf *noa; |
| struct wpabuf *wfd_ie; |
| }; |
| |
| |
| struct p2p_group * p2p_group_init(struct p2p_data *p2p, |
| struct p2p_group_config *config) |
| { |
| struct p2p_group *group, **groups; |
| |
| group = os_zalloc(sizeof(*group)); |
| if (group == NULL) |
| return NULL; |
| |
| groups = os_realloc_array(p2p->groups, p2p->num_groups + 1, |
| sizeof(struct p2p_group *)); |
| if (groups == NULL) { |
| os_free(group); |
| return NULL; |
| } |
| groups[p2p->num_groups++] = group; |
| p2p->groups = groups; |
| |
| group->p2p = p2p; |
| group->cfg = config; |
| group->group_formation = 1; |
| group->beacon_update = 1; |
| p2p_group_update_ies(group); |
| group->cfg->idle_update(group->cfg->cb_ctx, 1); |
| |
| return group; |
| } |
| |
| |
| static void p2p_group_free_member(struct p2p_group_member *m) |
| { |
| wpabuf_free(m->wfd_ie); |
| wpabuf_free(m->p2p_ie); |
| wpabuf_free(m->client_info); |
| os_free(m); |
| } |
| |
| |
| static void p2p_group_free_members(struct p2p_group *group) |
| { |
| struct p2p_group_member *m, *prev; |
| m = group->members; |
| group->members = NULL; |
| group->num_members = 0; |
| while (m) { |
| prev = m; |
| m = m->next; |
| p2p_group_free_member(prev); |
| } |
| } |
| |
| |
| void p2p_group_deinit(struct p2p_group *group) |
| { |
| size_t g; |
| struct p2p_data *p2p; |
| |
| if (group == NULL) |
| return; |
| |
| p2p = group->p2p; |
| |
| for (g = 0; g < p2p->num_groups; g++) { |
| if (p2p->groups[g] == group) { |
| while (g + 1 < p2p->num_groups) { |
| p2p->groups[g] = p2p->groups[g + 1]; |
| g++; |
| } |
| p2p->num_groups--; |
| break; |
| } |
| } |
| |
| p2p_group_free_members(group); |
| os_free(group->cfg); |
| wpabuf_free(group->noa); |
| wpabuf_free(group->wfd_ie); |
| os_free(group); |
| } |
| |
| |
| static void p2p_client_info(struct wpabuf *ie, struct p2p_group_member *m) |
| { |
| if (m->client_info == NULL) |
| return; |
| if (wpabuf_tailroom(ie) < wpabuf_len(m->client_info) + 1) |
| return; |
| wpabuf_put_buf(ie, m->client_info); |
| } |
| |
| |
| static void p2p_group_add_common_ies(struct p2p_group *group, |
| struct wpabuf *ie) |
| { |
| u8 dev_capab = group->p2p->dev_capab, group_capab = 0; |
| |
| /* P2P Capability */ |
| dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY; |
| group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER; |
| if (group->cfg->persistent_group) { |
| group_capab |= P2P_GROUP_CAPAB_PERSISTENT_GROUP; |
| if (group->cfg->persistent_group == 2) |
| group_capab |= P2P_GROUP_CAPAB_PERSISTENT_RECONN; |
| } |
| if (group->p2p->cfg->p2p_intra_bss) |
| group_capab |= P2P_GROUP_CAPAB_INTRA_BSS_DIST; |
| if (group->group_formation) |
| group_capab |= P2P_GROUP_CAPAB_GROUP_FORMATION; |
| if (group->p2p->cross_connect) |
| group_capab |= P2P_GROUP_CAPAB_CROSS_CONN; |
| if (group->num_members >= group->cfg->max_clients) |
| group_capab |= P2P_GROUP_CAPAB_GROUP_LIMIT; |
| p2p_buf_add_capability(ie, dev_capab, group_capab); |
| } |
| |
| |
| static void p2p_group_add_noa(struct wpabuf *ie, struct wpabuf *noa) |
| { |
| if (noa == NULL) |
| return; |
| /* Notice of Absence */ |
| wpabuf_put_u8(ie, P2P_ATTR_NOTICE_OF_ABSENCE); |
| wpabuf_put_le16(ie, wpabuf_len(noa)); |
| wpabuf_put_buf(ie, noa); |
| } |
| |
| |
| static struct wpabuf * p2p_group_build_beacon_ie(struct p2p_group *group) |
| { |
| struct wpabuf *ie; |
| u8 *len; |
| size_t extra = 0; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->p2p->wfd_ie_beacon) |
| extra = wpabuf_len(group->p2p->wfd_ie_beacon); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| ie = wpabuf_alloc(257 + extra); |
| if (ie == NULL) |
| return NULL; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->p2p->wfd_ie_beacon) |
| wpabuf_put_buf(ie, group->p2p->wfd_ie_beacon); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| len = p2p_buf_add_ie_hdr(ie); |
| p2p_group_add_common_ies(group, ie); |
| p2p_buf_add_device_id(ie, group->p2p->cfg->dev_addr); |
| p2p_group_add_noa(ie, group->noa); |
| p2p_buf_update_ie_hdr(ie, len); |
| |
| return ie; |
| } |
| |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| |
| struct wpabuf * p2p_group_get_wfd_ie(struct p2p_group *g) |
| { |
| return g->wfd_ie; |
| } |
| |
| |
| struct wpabuf * wifi_display_encaps(struct wpabuf *subelems) |
| { |
| struct wpabuf *ie; |
| const u8 *pos, *end; |
| |
| if (subelems == NULL) |
| return NULL; |
| |
| ie = wpabuf_alloc(wpabuf_len(subelems) + 100); |
| if (ie == NULL) |
| return NULL; |
| |
| pos = wpabuf_head(subelems); |
| end = pos + wpabuf_len(subelems); |
| |
| while (end > pos) { |
| size_t frag_len = end - pos; |
| if (frag_len > 251) |
| frag_len = 251; |
| wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC); |
| wpabuf_put_u8(ie, 4 + frag_len); |
| wpabuf_put_be32(ie, WFD_IE_VENDOR_TYPE); |
| wpabuf_put_data(ie, pos, frag_len); |
| pos += frag_len; |
| } |
| |
| return ie; |
| } |
| |
| |
| static int wifi_display_add_dev_info_descr(struct wpabuf *buf, |
| struct p2p_group_member *m) |
| { |
| const u8 *pos, *end; |
| const u8 *dev_info = NULL; |
| const u8 *assoc_bssid = NULL; |
| const u8 *coupled_sink = NULL; |
| u8 zero_addr[ETH_ALEN]; |
| |
| if (m->wfd_ie == NULL) |
| return 0; |
| |
| os_memset(zero_addr, 0, ETH_ALEN); |
| pos = wpabuf_head_u8(m->wfd_ie); |
| end = pos + wpabuf_len(m->wfd_ie); |
| while (pos + 1 < end) { |
| u8 id; |
| u16 len; |
| |
| id = *pos++; |
| len = WPA_GET_BE16(pos); |
| pos += 2; |
| if (pos + len > end) |
| break; |
| |
| switch (id) { |
| case WFD_SUBELEM_DEVICE_INFO: |
| if (len < 6) |
| break; |
| dev_info = pos; |
| break; |
| case WFD_SUBELEM_ASSOCIATED_BSSID: |
| if (len < ETH_ALEN) |
| break; |
| assoc_bssid = pos; |
| break; |
| case WFD_SUBELEM_COUPLED_SINK: |
| if (len < 1 + ETH_ALEN) |
| break; |
| coupled_sink = pos; |
| break; |
| } |
| |
| pos += len; |
| } |
| |
| if (dev_info == NULL) |
| return 0; |
| |
| wpabuf_put_u8(buf, 23); |
| wpabuf_put_data(buf, m->dev_addr, ETH_ALEN); |
| if (assoc_bssid) |
| wpabuf_put_data(buf, assoc_bssid, ETH_ALEN); |
| else |
| wpabuf_put_data(buf, zero_addr, ETH_ALEN); |
| wpabuf_put_data(buf, dev_info, 2); /* WFD Device Info */ |
| wpabuf_put_data(buf, dev_info + 4, 2); /* WFD Device Max Throughput */ |
| if (coupled_sink) { |
| wpabuf_put_data(buf, coupled_sink, 1 + ETH_ALEN); |
| } else { |
| wpabuf_put_u8(buf, 0); |
| wpabuf_put_data(buf, zero_addr, ETH_ALEN); |
| } |
| |
| return 1; |
| } |
| |
| |
| static struct wpabuf * |
| wifi_display_build_go_ie(struct p2p_group *group) |
| { |
| struct wpabuf *wfd_subelems, *wfd_ie; |
| struct p2p_group_member *m; |
| u8 *len; |
| unsigned int count = 0; |
| |
| if (!group->p2p->wfd_ie_probe_resp) |
| return NULL; |
| |
| wfd_subelems = wpabuf_alloc(wpabuf_len(group->p2p->wfd_ie_probe_resp) + |
| group->num_members * 24 + 100); |
| if (wfd_subelems == NULL) |
| return NULL; |
| if (group->p2p->wfd_dev_info) |
| wpabuf_put_buf(wfd_subelems, group->p2p->wfd_dev_info); |
| if (group->p2p->wfd_assoc_bssid) |
| wpabuf_put_buf(wfd_subelems, |
| group->p2p->wfd_assoc_bssid); |
| if (group->p2p->wfd_coupled_sink_info) |
| wpabuf_put_buf(wfd_subelems, |
| group->p2p->wfd_coupled_sink_info); |
| |
| /* Build WFD Session Info */ |
| wpabuf_put_u8(wfd_subelems, WFD_SUBELEM_SESSION_INFO); |
| len = wpabuf_put(wfd_subelems, 2); |
| m = group->members; |
| while (m) { |
| if (wifi_display_add_dev_info_descr(wfd_subelems, m)) |
| count++; |
| m = m->next; |
| } |
| |
| if (count == 0) { |
| /* No Wi-Fi Display clients - do not include subelement */ |
| wfd_subelems->used -= 3; |
| } else { |
| WPA_PUT_BE16(len, (u8 *) wpabuf_put(wfd_subelems, 0) - len - |
| 2); |
| wpa_printf(MSG_DEBUG, "WFD: WFD Session Info: %u descriptors", |
| count); |
| } |
| |
| wfd_ie = wifi_display_encaps(wfd_subelems); |
| wpabuf_free(wfd_subelems); |
| |
| return wfd_ie; |
| } |
| |
| static void wifi_display_group_update(struct p2p_group *group) |
| { |
| wpabuf_free(group->wfd_ie); |
| group->wfd_ie = wifi_display_build_go_ie(group); |
| } |
| |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| |
| static struct wpabuf * p2p_group_build_probe_resp_ie(struct p2p_group *group) |
| { |
| u8 *group_info; |
| struct wpabuf *ie; |
| struct p2p_group_member *m; |
| u8 *len; |
| size_t extra = 0; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->wfd_ie) |
| extra += wpabuf_len(group->wfd_ie); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| ie = wpabuf_alloc(257 + extra); |
| if (ie == NULL) |
| return NULL; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->wfd_ie) |
| wpabuf_put_buf(ie, group->wfd_ie); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| len = p2p_buf_add_ie_hdr(ie); |
| |
| p2p_group_add_common_ies(group, ie); |
| p2p_group_add_noa(ie, group->noa); |
| |
| /* P2P Device Info */ |
| p2p_buf_add_device_info(ie, group->p2p, NULL); |
| |
| /* P2P Group Info */ |
| group_info = wpabuf_put(ie, 0); |
| wpabuf_put_u8(ie, P2P_ATTR_GROUP_INFO); |
| wpabuf_put_le16(ie, 0); /* Length to be filled */ |
| for (m = group->members; m; m = m->next) |
| p2p_client_info(ie, m); |
| WPA_PUT_LE16(group_info + 1, |
| (u8 *) wpabuf_put(ie, 0) - group_info - 3); |
| |
| p2p_buf_update_ie_hdr(ie, len); |
| |
| return ie; |
| } |
| |
| |
| void p2p_group_update_ies(struct p2p_group *group) |
| { |
| struct wpabuf *beacon_ie; |
| struct wpabuf *probe_resp_ie; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| wifi_display_group_update(group); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| probe_resp_ie = p2p_group_build_probe_resp_ie(group); |
| if (probe_resp_ie == NULL) |
| return; |
| wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Probe Response P2P IE", |
| probe_resp_ie); |
| |
| if (group->beacon_update) { |
| beacon_ie = p2p_group_build_beacon_ie(group); |
| if (beacon_ie) |
| group->beacon_update = 0; |
| wpa_hexdump_buf(MSG_MSGDUMP, "P2P: Update GO Beacon P2P IE", |
| beacon_ie); |
| } else |
| beacon_ie = NULL; |
| |
| group->cfg->ie_update(group->cfg->cb_ctx, beacon_ie, probe_resp_ie); |
| } |
| |
| |
| /** |
| * p2p_build_client_info - Build P2P Client Info Descriptor |
| * @addr: MAC address of the peer device |
| * @p2p_ie: P2P IE from (Re)Association Request |
| * @dev_capab: Buffer for returning Device Capability |
| * @dev_addr: Buffer for returning P2P Device Address |
| * Returns: P2P Client Info Descriptor or %NULL on failure |
| * |
| * This function builds P2P Client Info Descriptor based on the information |
| * available from (Re)Association Request frame. Group owner can use this to |
| * build the P2P Group Info attribute for Probe Response frames. |
| */ |
| static struct wpabuf * p2p_build_client_info(const u8 *addr, |
| struct wpabuf *p2p_ie, |
| u8 *dev_capab, u8 *dev_addr) |
| { |
| const u8 *spos; |
| struct p2p_message msg; |
| u8 *len_pos; |
| struct wpabuf *buf; |
| |
| if (p2p_ie == NULL) |
| return NULL; |
| |
| os_memset(&msg, 0, sizeof(msg)); |
| if (p2p_parse_p2p_ie(p2p_ie, &msg) || |
| msg.capability == NULL || msg.p2p_device_info == NULL) |
| return NULL; |
| |
| buf = wpabuf_alloc(ETH_ALEN + 1 + 1 + msg.p2p_device_info_len); |
| if (buf == NULL) |
| return NULL; |
| |
| *dev_capab = msg.capability[0]; |
| os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN); |
| |
| spos = msg.p2p_device_info; /* P2P Device address */ |
| |
| /* P2P Client Info Descriptor */ |
| /* Length to be set */ |
| len_pos = wpabuf_put(buf, 1); |
| /* P2P Device address */ |
| wpabuf_put_data(buf, spos, ETH_ALEN); |
| /* P2P Interface address */ |
| wpabuf_put_data(buf, addr, ETH_ALEN); |
| /* Device Capability Bitmap */ |
| wpabuf_put_u8(buf, msg.capability[0]); |
| /* |
| * Config Methods, Primary Device Type, Number of Secondary Device |
| * Types, Secondary Device Type List, Device Name copied from |
| * Device Info |
| */ |
| wpabuf_put_data(buf, spos + ETH_ALEN, |
| msg.p2p_device_info_len - ETH_ALEN); |
| |
| *len_pos = wpabuf_len(buf) - 1; |
| |
| |
| return buf; |
| } |
| |
| |
| static int p2p_group_remove_member(struct p2p_group *group, const u8 *addr) |
| { |
| struct p2p_group_member *m, *prev; |
| |
| if (group == NULL) |
| return 0; |
| |
| m = group->members; |
| prev = NULL; |
| while (m) { |
| if (os_memcmp(m->addr, addr, ETH_ALEN) == 0) |
| break; |
| prev = m; |
| m = m->next; |
| } |
| |
| if (m == NULL) |
| return 0; |
| |
| if (prev) |
| prev->next = m->next; |
| else |
| group->members = m->next; |
| p2p_group_free_member(m); |
| group->num_members--; |
| |
| return 1; |
| } |
| |
| |
| int p2p_group_notif_assoc(struct p2p_group *group, const u8 *addr, |
| const u8 *ie, size_t len) |
| { |
| struct p2p_group_member *m; |
| |
| if (group == NULL) |
| return -1; |
| |
| m = os_zalloc(sizeof(*m)); |
| if (m == NULL) |
| return -1; |
| os_memcpy(m->addr, addr, ETH_ALEN); |
| m->p2p_ie = ieee802_11_vendor_ie_concat(ie, len, P2P_IE_VENDOR_TYPE); |
| if (m->p2p_ie) { |
| m->client_info = p2p_build_client_info(addr, m->p2p_ie, |
| &m->dev_capab, |
| m->dev_addr); |
| } |
| #ifdef CONFIG_WIFI_DISPLAY |
| m->wfd_ie = ieee802_11_vendor_ie_concat(ie, len, WFD_IE_VENDOR_TYPE); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| p2p_group_remove_member(group, addr); |
| |
| m->next = group->members; |
| group->members = m; |
| group->num_members++; |
| wpa_msg(group->p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Add client " MACSTR |
| " to group (p2p=%d wfd=%d client_info=%d); num_members=%u/%u", |
| MAC2STR(addr), m->p2p_ie ? 1 : 0, m->wfd_ie ? 1 : 0, |
| m->client_info ? 1 : 0, |
| group->num_members, group->cfg->max_clients); |
| if (group->num_members == group->cfg->max_clients) |
| group->beacon_update = 1; |
| p2p_group_update_ies(group); |
| if (group->num_members == 1) |
| group->cfg->idle_update(group->cfg->cb_ctx, 0); |
| |
| return 0; |
| } |
| |
| |
| struct wpabuf * p2p_group_assoc_resp_ie(struct p2p_group *group, u8 status) |
| { |
| struct wpabuf *resp; |
| u8 *rlen; |
| size_t extra = 0; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->wfd_ie) |
| extra = wpabuf_len(group->wfd_ie); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| /* |
| * (Re)Association Response - P2P IE |
| * Status attribute (shall be present when association request is |
| * denied) |
| * Extended Listen Timing (may be present) |
| */ |
| resp = wpabuf_alloc(20 + extra); |
| if (resp == NULL) |
| return NULL; |
| |
| #ifdef CONFIG_WIFI_DISPLAY |
| if (group->wfd_ie) |
| wpabuf_put_buf(resp, group->wfd_ie); |
| #endif /* CONFIG_WIFI_DISPLAY */ |
| |
| rlen = p2p_buf_add_ie_hdr(resp); |
| if (status != P2P_SC_SUCCESS) |
| p2p_buf_add_status(resp, status); |
| p2p_buf_update_ie_hdr(resp, rlen); |
| |
| return resp; |
| } |
| |
| |
| void p2p_group_notif_disassoc(struct p2p_group *group, const u8 *addr) |
| { |
| if (p2p_group_remove_member(group, addr)) { |
| wpa_msg(group->p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Remove " |
| "client " MACSTR " from group; num_members=%u/%u", |
| MAC2STR(addr), group->num_members, |
| group->cfg->max_clients); |
| if (group->num_members == group->cfg->max_clients - 1) |
| group->beacon_update = 1; |
| p2p_group_update_ies(group); |
| if (group->num_members == 0) |
| group->cfg->idle_update(group->cfg->cb_ctx, 1); |
| } |
| } |
| |
| |
| /** |
| * p2p_match_dev_type_member - Match client device type with requested type |
| * @m: Group member |
| * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs) |
| * Returns: 1 on match, 0 on mismatch |
| * |
| * This function can be used to match the Requested Device Type attribute in |
| * WPS IE with the device types of a group member for deciding whether a GO |
| * should reply to a Probe Request frame. |
| */ |
| static int p2p_match_dev_type_member(struct p2p_group_member *m, |
| struct wpabuf *wps) |
| { |
| const u8 *pos, *end; |
| struct wps_parse_attr attr; |
| u8 num_sec; |
| |
| if (m->client_info == NULL || wps == NULL) |
| return 0; |
| |
| pos = wpabuf_head(m->client_info); |
| end = pos + wpabuf_len(m->client_info); |
| |
| pos += 1 + 2 * ETH_ALEN + 1 + 2; |
| if (end - pos < WPS_DEV_TYPE_LEN + 1) |
| return 0; |
| |
| if (wps_parse_msg(wps, &attr)) |
| return 1; /* assume no Requested Device Type attributes */ |
| |
| if (attr.num_req_dev_type == 0) |
| return 1; /* no Requested Device Type attributes -> match */ |
| |
| if (dev_type_list_match(pos, attr.req_dev_type, attr.num_req_dev_type)) |
| return 1; /* Match with client Primary Device Type */ |
| |
| pos += WPS_DEV_TYPE_LEN; |
| num_sec = *pos++; |
| if (end - pos < num_sec * WPS_DEV_TYPE_LEN) |
| return 0; |
| while (num_sec > 0) { |
| num_sec--; |
| if (dev_type_list_match(pos, attr.req_dev_type, |
| attr.num_req_dev_type)) |
| return 1; /* Match with client Secondary Device Type */ |
| pos += WPS_DEV_TYPE_LEN; |
| } |
| |
| /* No matching device type found */ |
| return 0; |
| } |
| |
| |
| int p2p_group_match_dev_type(struct p2p_group *group, struct wpabuf *wps) |
| { |
| struct p2p_group_member *m; |
| |
| if (p2p_match_dev_type(group->p2p, wps)) |
| return 1; /* Match with own device type */ |
| |
| for (m = group->members; m; m = m->next) { |
| if (p2p_match_dev_type_member(m, wps)) |
| return 1; /* Match with group client device type */ |
| } |
| |
| /* No match with Requested Device Type */ |
| return 0; |
| } |
| |
| |
| int p2p_group_match_dev_id(struct p2p_group *group, struct wpabuf *p2p) |
| { |
| struct p2p_group_member *m; |
| struct p2p_message msg; |
| |
| os_memset(&msg, 0, sizeof(msg)); |
| if (p2p_parse_p2p_ie(p2p, &msg)) |
| return 1; /* Failed to parse - assume no filter on Device ID */ |
| |
| if (!msg.device_id) |
| return 1; /* No filter on Device ID */ |
| |
| if (os_memcmp(msg.device_id, group->p2p->cfg->dev_addr, ETH_ALEN) == 0) |
| return 1; /* Match with our P2P Device Address */ |
| |
| for (m = group->members; m; m = m->next) { |
| if (os_memcmp(msg.device_id, m->dev_addr, ETH_ALEN) == 0) |
| return 1; /* Match with group client P2P Device Address */ |
| } |
| |
| /* No match with Device ID */ |
| return 0; |
| } |
| |
| |
| void p2p_group_notif_formation_done(struct p2p_group *group) |
| { |
| if (group == NULL) |
| return; |
| group->group_formation = 0; |
| group->beacon_update = 1; |
| p2p_group_update_ies(group); |
| } |
| |
| |
| int p2p_group_notif_noa(struct p2p_group *group, const u8 *noa, |
| size_t noa_len) |
| { |
| if (noa == NULL) { |
| wpabuf_free(group->noa); |
| group->noa = NULL; |
| } else { |
| if (group->noa) { |
| if (wpabuf_size(group->noa) >= noa_len) { |
| group->noa->used = 0; |
| wpabuf_put_data(group->noa, noa, noa_len); |
| } else { |
| wpabuf_free(group->noa); |
| group->noa = NULL; |
| } |
| } |
| |
| if (!group->noa) { |
| group->noa = wpabuf_alloc_copy(noa, noa_len); |
| if (group->noa == NULL) |
| return -1; |
| } |
| } |
| |
| group->beacon_update = 1; |
| p2p_group_update_ies(group); |
| return 0; |
| } |
| |
| |
| static struct p2p_group_member * p2p_group_get_client(struct p2p_group *group, |
| const u8 *dev_id) |
| { |
| struct p2p_group_member *m; |
| |
| for (m = group->members; m; m = m->next) { |
| if (os_memcmp(dev_id, m->dev_addr, ETH_ALEN) == 0) |
| return m; |
| } |
| |
| return NULL; |
| } |
| |
| |
| static struct p2p_group_member * p2p_group_get_client_iface( |
| struct p2p_group *group, const u8 *interface_addr) |
| { |
| struct p2p_group_member *m; |
| |
| for (m = group->members; m; m = m->next) { |
| if (os_memcmp(interface_addr, m->addr, ETH_ALEN) == 0) |
| return m; |
| } |
| |
| return NULL; |
| } |
| |
| |
| const u8 * p2p_group_get_dev_addr(struct p2p_group *group, const u8 *addr) |
| { |
| struct p2p_group_member *m; |
| |
| if (group == NULL) |
| return NULL; |
| m = p2p_group_get_client_iface(group, addr); |
| if (m && !is_zero_ether_addr(m->dev_addr)) |
| return m->dev_addr; |
| return NULL; |
| } |
| |
| |
| static struct wpabuf * p2p_build_go_disc_req(void) |
| { |
| struct wpabuf *buf; |
| |
| buf = wpabuf_alloc(100); |
| if (buf == NULL) |
| return NULL; |
| |
| p2p_buf_add_action_hdr(buf, P2P_GO_DISC_REQ, 0); |
| |
| return buf; |
| } |
| |
| |
| int p2p_group_go_discover(struct p2p_group *group, const u8 *dev_id, |
| const u8 *searching_dev, int rx_freq) |
| { |
| struct p2p_group_member *m; |
| struct wpabuf *req; |
| struct p2p_data *p2p = group->p2p; |
| int freq; |
| |
| m = p2p_group_get_client(group, dev_id); |
| if (m == NULL || m->client_info == NULL) { |
| wpa_printf(MSG_DEBUG, "P2P: Requested client was not in this " |
| "group " MACSTR, |
| MAC2STR(group->cfg->interface_addr)); |
| return -1; |
| } |
| |
| if (!(m->dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) { |
| wpa_printf(MSG_DEBUG, "P2P: Requested client does not support " |
| "client discoverability"); |
| return -1; |
| } |
| |
| wpa_printf(MSG_DEBUG, "P2P: Schedule GO Discoverability Request to be " |
| "sent to " MACSTR, MAC2STR(dev_id)); |
| |
| req = p2p_build_go_disc_req(); |
| if (req == NULL) |
| return -1; |
| |
| /* TODO: Should really use group operating frequency here */ |
| freq = rx_freq; |
| |
| p2p->pending_action_state = P2P_PENDING_GO_DISC_REQ; |
| if (p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, m->addr, |
| group->cfg->interface_addr, |
| group->cfg->interface_addr, |
| wpabuf_head(req), wpabuf_len(req), 200) < 0) |
| { |
| wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, |
| "P2P: Failed to send Action frame"); |
| } |
| |
| wpabuf_free(req); |
| |
| return 0; |
| } |
| |
| |
| const u8 * p2p_group_get_interface_addr(struct p2p_group *group) |
| { |
| return group->cfg->interface_addr; |
| } |
| |
| |
| u8 p2p_group_presence_req(struct p2p_group *group, |
| const u8 *client_interface_addr, |
| const u8 *noa, size_t noa_len) |
| { |
| struct p2p_group_member *m; |
| u8 curr_noa[50]; |
| int curr_noa_len; |
| |
| m = p2p_group_get_client_iface(group, client_interface_addr); |
| if (m == NULL || m->client_info == NULL) { |
| wpa_printf(MSG_DEBUG, "P2P: Client was not in this group"); |
| return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; |
| } |
| |
| wpa_hexdump(MSG_DEBUG, "P2P: Presence Request NoA", noa, noa_len); |
| |
| if (group->p2p->cfg->get_noa) |
| curr_noa_len = group->p2p->cfg->get_noa( |
| group->p2p->cfg->cb_ctx, group->cfg->interface_addr, |
| curr_noa, sizeof(curr_noa)); |
| else |
| curr_noa_len = -1; |
| if (curr_noa_len < 0) |
| wpa_printf(MSG_DEBUG, "P2P: Failed to fetch current NoA"); |
| else if (curr_noa_len == 0) |
| wpa_printf(MSG_DEBUG, "P2P: No NoA being advertized"); |
| else |
| wpa_hexdump(MSG_DEBUG, "P2P: Current NoA", curr_noa, |
| curr_noa_len); |
| |
| /* TODO: properly process request and store copy */ |
| if (curr_noa_len > 0 || curr_noa_len == -1) |
| return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; |
| |
| return P2P_SC_SUCCESS; |
| } |
| |
| |
| unsigned int p2p_get_group_num_members(struct p2p_group *group) |
| { |
| return group->num_members; |
| } |
| |
| |
| const u8 * p2p_iterate_group_members(struct p2p_group *group, void **next) |
| { |
| struct p2p_group_member *iter = *next; |
| |
| if (!iter) |
| iter = group->members; |
| else |
| iter = iter->next; |
| |
| *next = iter; |
| |
| if (!iter) |
| return NULL; |
| |
| return iter->addr; |
| } |
| |
| |
| int p2p_group_is_client_connected(struct p2p_group *group, const u8 *dev_addr) |
| { |
| struct p2p_group_member *m; |
| |
| for (m = group->members; m; m = m->next) { |
| if (os_memcmp(m->dev_addr, dev_addr, ETH_ALEN) == 0) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| int p2p_group_is_group_id_match(struct p2p_group *group, const u8 *group_id, |
| size_t group_id_len) |
| { |
| if (group_id_len != ETH_ALEN + group->cfg->ssid_len) |
| return 0; |
| if (os_memcmp(group_id, group->p2p->cfg->dev_addr, ETH_ALEN) != 0) |
| return 0; |
| return os_memcmp(group_id + ETH_ALEN, group->cfg->ssid, |
| group->cfg->ssid_len) == 0; |
| } |