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- /*
- * P2P - IE builder
- * 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/qca-vendor.h"
- #include "wps/wps_i.h"
- #include "p2p_i.h"
- void p2p_buf_add_action_hdr(struct wpabuf *buf, u8 subtype, u8 dialog_token)
- {
- wpabuf_put_u8(buf, WLAN_ACTION_VENDOR_SPECIFIC);
- wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
- wpabuf_put_u8(buf, subtype); /* OUI Subtype */
- wpabuf_put_u8(buf, dialog_token);
- wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
- }
- void p2p_buf_add_public_action_hdr(struct wpabuf *buf, u8 subtype,
- u8 dialog_token)
- {
- wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
- wpabuf_put_u8(buf, WLAN_PA_VENDOR_SPECIFIC);
- wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
- wpabuf_put_u8(buf, subtype); /* OUI Subtype */
- wpabuf_put_u8(buf, dialog_token);
- wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", dialog_token);
- }
- u8 * p2p_buf_add_ie_hdr(struct wpabuf *buf)
- {
- u8 *len;
- /* P2P IE header */
- wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
- len = wpabuf_put(buf, 1); /* IE length to be filled */
- wpabuf_put_be32(buf, P2P_IE_VENDOR_TYPE);
- wpa_printf(MSG_DEBUG, "P2P: * P2P IE header");
- return len;
- }
- void p2p_buf_update_ie_hdr(struct wpabuf *buf, u8 *len)
- {
- /* Update P2P IE Length */
- *len = (u8 *) wpabuf_put(buf, 0) - len - 1;
- }
- void p2p_buf_add_capability(struct wpabuf *buf, u8 dev_capab, u8 group_capab)
- {
- /* P2P Capability */
- wpabuf_put_u8(buf, P2P_ATTR_CAPABILITY);
- wpabuf_put_le16(buf, 2);
- wpabuf_put_u8(buf, dev_capab); /* Device Capabilities */
- wpabuf_put_u8(buf, group_capab); /* Group Capabilities */
- wpa_printf(MSG_DEBUG, "P2P: * Capability dev=%02x group=%02x",
- dev_capab, group_capab);
- }
- void p2p_buf_add_go_intent(struct wpabuf *buf, u8 go_intent)
- {
- /* Group Owner Intent */
- wpabuf_put_u8(buf, P2P_ATTR_GROUP_OWNER_INTENT);
- wpabuf_put_le16(buf, 1);
- wpabuf_put_u8(buf, go_intent);
- wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u Tie breaker %u",
- go_intent >> 1, go_intent & 0x01);
- }
- void p2p_buf_add_listen_channel(struct wpabuf *buf, const char *country,
- u8 reg_class, u8 channel)
- {
- /* Listen Channel */
- wpabuf_put_u8(buf, P2P_ATTR_LISTEN_CHANNEL);
- wpabuf_put_le16(buf, 5);
- wpabuf_put_data(buf, country, 3);
- wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
- wpabuf_put_u8(buf, channel); /* Channel Number */
- wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Regulatory Class %u "
- "Channel %u", reg_class, channel);
- }
- void p2p_buf_add_operating_channel(struct wpabuf *buf, const char *country,
- u8 reg_class, u8 channel)
- {
- /* Operating Channel */
- wpabuf_put_u8(buf, P2P_ATTR_OPERATING_CHANNEL);
- wpabuf_put_le16(buf, 5);
- wpabuf_put_data(buf, country, 3);
- wpabuf_put_u8(buf, reg_class); /* Regulatory Class */
- wpabuf_put_u8(buf, channel); /* Channel Number */
- wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: Regulatory Class %u "
- "Channel %u", reg_class, channel);
- }
- void p2p_buf_add_pref_channel_list(struct wpabuf *buf,
- const u32 *preferred_freq_list,
- unsigned int size)
- {
- unsigned int i, count = 0;
- u8 op_class, op_channel;
- if (!size)
- return;
- /*
- * First, determine the number of P2P supported channels in the
- * pref_freq_list returned from driver. This is needed for calculations
- * of the vendor IE size.
- */
- for (i = 0; i < size; i++) {
- if (p2p_freq_to_channel(preferred_freq_list[i], &op_class,
- &op_channel) == 0)
- count++;
- }
- wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
- wpabuf_put_u8(buf, 4 + count * sizeof(u16));
- wpabuf_put_be24(buf, OUI_QCA);
- wpabuf_put_u8(buf, QCA_VENDOR_ELEM_P2P_PREF_CHAN_LIST);
- for (i = 0; i < size; i++) {
- if (p2p_freq_to_channel(preferred_freq_list[i], &op_class,
- &op_channel) < 0) {
- wpa_printf(MSG_DEBUG, "Unsupported frequency %u MHz",
- preferred_freq_list[i]);
- continue;
- }
- wpabuf_put_u8(buf, op_class);
- wpabuf_put_u8(buf, op_channel);
- }
- }
- void p2p_buf_add_channel_list(struct wpabuf *buf, const char *country,
- struct p2p_channels *chan)
- {
- u8 *len;
- size_t i;
- /* Channel List */
- wpabuf_put_u8(buf, P2P_ATTR_CHANNEL_LIST);
- len = wpabuf_put(buf, 2); /* IE length to be filled */
- wpabuf_put_data(buf, country, 3); /* Country String */
- for (i = 0; i < chan->reg_classes; i++) {
- struct p2p_reg_class *c = &chan->reg_class[i];
- wpabuf_put_u8(buf, c->reg_class);
- wpabuf_put_u8(buf, c->channels);
- wpabuf_put_data(buf, c->channel, c->channels);
- }
- /* Update attribute length */
- WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
- wpa_hexdump(MSG_DEBUG, "P2P: * Channel List",
- len + 2, (u8 *) wpabuf_put(buf, 0) - len - 2);
- }
- void p2p_buf_add_status(struct wpabuf *buf, u8 status)
- {
- /* Status */
- wpabuf_put_u8(buf, P2P_ATTR_STATUS);
- wpabuf_put_le16(buf, 1);
- wpabuf_put_u8(buf, status);
- wpa_printf(MSG_DEBUG, "P2P: * Status: %d", status);
- }
- void p2p_buf_add_device_info(struct wpabuf *buf, struct p2p_data *p2p,
- struct p2p_device *peer)
- {
- u8 *len;
- u16 methods;
- size_t nlen, i;
- /* P2P Device Info */
- wpabuf_put_u8(buf, P2P_ATTR_DEVICE_INFO);
- len = wpabuf_put(buf, 2); /* IE length to be filled */
- /* P2P Device address */
- wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
- /* Config Methods */
- methods = 0;
- if (peer && peer->wps_method != WPS_NOT_READY) {
- if (peer->wps_method == WPS_PBC)
- methods |= WPS_CONFIG_PUSHBUTTON;
- else if (peer->wps_method == WPS_PIN_DISPLAY ||
- peer->wps_method == WPS_PIN_KEYPAD) {
- methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
- methods |= WPS_CONFIG_P2PS;
- }
- } else if (p2p->cfg->config_methods) {
- methods |= p2p->cfg->config_methods &
- (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY |
- WPS_CONFIG_KEYPAD | WPS_CONFIG_P2PS);
- } else {
- methods |= WPS_CONFIG_PUSHBUTTON;
- methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
- methods |= WPS_CONFIG_P2PS;
- }
- wpabuf_put_be16(buf, methods);
- /* Primary Device Type */
- wpabuf_put_data(buf, p2p->cfg->pri_dev_type,
- sizeof(p2p->cfg->pri_dev_type));
- /* Number of Secondary Device Types */
- wpabuf_put_u8(buf, p2p->cfg->num_sec_dev_types);
- /* Secondary Device Type List */
- for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
- wpabuf_put_data(buf, p2p->cfg->sec_dev_type[i],
- WPS_DEV_TYPE_LEN);
- /* Device Name */
- nlen = p2p->cfg->dev_name ? os_strlen(p2p->cfg->dev_name) : 0;
- wpabuf_put_be16(buf, ATTR_DEV_NAME);
- wpabuf_put_be16(buf, nlen);
- wpabuf_put_data(buf, p2p->cfg->dev_name, nlen);
- /* Update attribute length */
- WPA_PUT_LE16(len, (u8 *) wpabuf_put(buf, 0) - len - 2);
- wpa_printf(MSG_DEBUG, "P2P: * Device Info");
- }
- void p2p_buf_add_device_id(struct wpabuf *buf, const u8 *dev_addr)
- {
- /* P2P Device ID */
- wpabuf_put_u8(buf, P2P_ATTR_DEVICE_ID);
- wpabuf_put_le16(buf, ETH_ALEN);
- wpabuf_put_data(buf, dev_addr, ETH_ALEN);
- wpa_printf(MSG_DEBUG, "P2P: * Device ID: " MACSTR, MAC2STR(dev_addr));
- }
- void p2p_buf_add_config_timeout(struct wpabuf *buf, u8 go_timeout,
- u8 client_timeout)
- {
- /* Configuration Timeout */
- wpabuf_put_u8(buf, P2P_ATTR_CONFIGURATION_TIMEOUT);
- wpabuf_put_le16(buf, 2);
- wpabuf_put_u8(buf, go_timeout);
- wpabuf_put_u8(buf, client_timeout);
- wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout: GO %d (*10ms) "
- "client %d (*10ms)", go_timeout, client_timeout);
- }
- void p2p_buf_add_intended_addr(struct wpabuf *buf, const u8 *interface_addr)
- {
- /* Intended P2P Interface Address */
- wpabuf_put_u8(buf, P2P_ATTR_INTENDED_INTERFACE_ADDR);
- wpabuf_put_le16(buf, ETH_ALEN);
- wpabuf_put_data(buf, interface_addr, ETH_ALEN);
- wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address " MACSTR,
- MAC2STR(interface_addr));
- }
- void p2p_buf_add_group_bssid(struct wpabuf *buf, const u8 *bssid)
- {
- /* P2P Group BSSID */
- wpabuf_put_u8(buf, P2P_ATTR_GROUP_BSSID);
- wpabuf_put_le16(buf, ETH_ALEN);
- wpabuf_put_data(buf, bssid, ETH_ALEN);
- wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID " MACSTR,
- MAC2STR(bssid));
- }
- void p2p_buf_add_group_id(struct wpabuf *buf, const u8 *dev_addr,
- const u8 *ssid, size_t ssid_len)
- {
- /* P2P Group ID */
- wpabuf_put_u8(buf, P2P_ATTR_GROUP_ID);
- wpabuf_put_le16(buf, ETH_ALEN + ssid_len);
- wpabuf_put_data(buf, dev_addr, ETH_ALEN);
- wpabuf_put_data(buf, ssid, ssid_len);
- wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR,
- MAC2STR(dev_addr));
- wpa_hexdump_ascii(MSG_DEBUG, "P2P: P2P Group ID SSID", ssid, ssid_len);
- }
- void p2p_buf_add_invitation_flags(struct wpabuf *buf, u8 flags)
- {
- /* Invitation Flags */
- wpabuf_put_u8(buf, P2P_ATTR_INVITATION_FLAGS);
- wpabuf_put_le16(buf, 1);
- wpabuf_put_u8(buf, flags);
- wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x", flags);
- }
- static void p2p_buf_add_noa_desc(struct wpabuf *buf, struct p2p_noa_desc *desc)
- {
- if (desc == NULL)
- return;
- wpabuf_put_u8(buf, desc->count_type);
- wpabuf_put_le32(buf, desc->duration);
- wpabuf_put_le32(buf, desc->interval);
- wpabuf_put_le32(buf, desc->start_time);
- }
- void p2p_buf_add_noa(struct wpabuf *buf, u8 noa_index, u8 opp_ps, u8 ctwindow,
- struct p2p_noa_desc *desc1, struct p2p_noa_desc *desc2)
- {
- /* Notice of Absence */
- wpabuf_put_u8(buf, P2P_ATTR_NOTICE_OF_ABSENCE);
- wpabuf_put_le16(buf, 2 + (desc1 ? 13 : 0) + (desc2 ? 13 : 0));
- wpabuf_put_u8(buf, noa_index);
- wpabuf_put_u8(buf, (opp_ps ? 0x80 : 0) | (ctwindow & 0x7f));
- p2p_buf_add_noa_desc(buf, desc1);
- p2p_buf_add_noa_desc(buf, desc2);
- wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
- }
- void p2p_buf_add_ext_listen_timing(struct wpabuf *buf, u16 period,
- u16 interval)
- {
- /* Extended Listen Timing */
- wpabuf_put_u8(buf, P2P_ATTR_EXT_LISTEN_TIMING);
- wpabuf_put_le16(buf, 4);
- wpabuf_put_le16(buf, period);
- wpabuf_put_le16(buf, interval);
- wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing (period %u msec "
- "interval %u msec)", period, interval);
- }
- void p2p_buf_add_p2p_interface(struct wpabuf *buf, struct p2p_data *p2p)
- {
- /* P2P Interface */
- wpabuf_put_u8(buf, P2P_ATTR_INTERFACE);
- wpabuf_put_le16(buf, ETH_ALEN + 1 + ETH_ALEN);
- /* P2P Device address */
- wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
- /*
- * FIX: Fetch interface address list from driver. Do not include
- * the P2P Device address if it is never used as interface address.
- */
- /* P2P Interface Address Count */
- wpabuf_put_u8(buf, 1);
- wpabuf_put_data(buf, p2p->cfg->dev_addr, ETH_ALEN);
- }
- void p2p_buf_add_oob_go_neg_channel(struct wpabuf *buf, const char *country,
- u8 oper_class, u8 channel,
- enum p2p_role_indication role)
- {
- /* OOB Group Owner Negotiation Channel */
- wpabuf_put_u8(buf, P2P_ATTR_OOB_GO_NEG_CHANNEL);
- wpabuf_put_le16(buf, 6);
- wpabuf_put_data(buf, country, 3);
- wpabuf_put_u8(buf, oper_class); /* Operating Class */
- wpabuf_put_u8(buf, channel); /* Channel Number */
- wpabuf_put_u8(buf, (u8) role); /* Role indication */
- wpa_printf(MSG_DEBUG, "P2P: * OOB GO Negotiation Channel: Operating "
- "Class %u Channel %u Role %d",
- oper_class, channel, role);
- }
- void p2p_buf_add_service_hash(struct wpabuf *buf, struct p2p_data *p2p)
- {
- if (!p2p)
- return;
- /* Service Hash */
- wpabuf_put_u8(buf, P2P_ATTR_SERVICE_HASH);
- wpabuf_put_le16(buf, p2p->p2ps_seek_count * P2PS_HASH_LEN);
- wpabuf_put_data(buf, p2p->p2ps_seek_hash,
- p2p->p2ps_seek_count * P2PS_HASH_LEN);
- wpa_hexdump(MSG_DEBUG, "P2P: * Service Hash",
- p2p->p2ps_seek_hash, p2p->p2ps_seek_count * P2PS_HASH_LEN);
- }
- void p2p_buf_add_session_info(struct wpabuf *buf, const char *info)
- {
- size_t info_len = 0;
- if (info && info[0])
- info_len = os_strlen(info);
- /* Session Information Data Info */
- wpabuf_put_u8(buf, P2P_ATTR_SESSION_INFORMATION_DATA);
- wpabuf_put_le16(buf, (u16) info_len);
- if (info) {
- wpabuf_put_data(buf, info, info_len);
- wpa_printf(MSG_DEBUG, "P2P: * Session Info Data (%s)", info);
- }
- }
- void p2p_buf_add_connection_capability(struct wpabuf *buf, u8 connection_cap)
- {
- /* Connection Capability Info */
- wpabuf_put_u8(buf, P2P_ATTR_CONNECTION_CAPABILITY);
- wpabuf_put_le16(buf, 1);
- wpabuf_put_u8(buf, connection_cap);
- wpa_printf(MSG_DEBUG, "P2P: * Connection Capability: 0x%x",
- connection_cap);
- }
- void p2p_buf_add_advertisement_id(struct wpabuf *buf, u32 id, const u8 *mac)
- {
- if (!buf || !mac)
- return;
- /* Advertisement ID Info */
- wpabuf_put_u8(buf, P2P_ATTR_ADVERTISEMENT_ID);
- wpabuf_put_le16(buf, (u16) (sizeof(u32) + ETH_ALEN));
- wpabuf_put_le32(buf, id);
- wpabuf_put_data(buf, mac, ETH_ALEN);
- wpa_printf(MSG_DEBUG, "P2P: * Advertisement ID (%x) " MACSTR,
- id, MAC2STR(mac));
- }
- static int p2ps_wildcard_hash(struct p2p_data *p2p,
- const u8 *hash, u8 hash_count)
- {
- u8 i;
- const u8 *test = hash;
- for (i = 0; i < hash_count; i++) {
- if (os_memcmp(test, p2p->wild_card_hash, P2PS_HASH_LEN) == 0)
- return 1;
- test += P2PS_HASH_LEN;
- }
- return 0;
- }
- static int p2p_wfa_service_adv(struct p2p_data *p2p)
- {
- struct p2ps_advertisement *adv;
- for (adv = p2p->p2ps_adv_list; adv; adv = adv->next) {
- if (os_strncmp(adv->svc_name, P2PS_WILD_HASH_STR,
- os_strlen(P2PS_WILD_HASH_STR)) == 0)
- return 1;
- }
- return 0;
- }
- static int p2p_buf_add_service_info(struct wpabuf *buf, struct p2p_data *p2p,
- u32 adv_id, u16 config_methods,
- const char *svc_name, u8 **ie_len, u8 **pos,
- size_t *total_len, u8 *attr_len)
- {
- size_t svc_len;
- size_t remaining;
- size_t info_len;
- p2p_dbg(p2p, "Add service info for %s (adv_id=%u)", svc_name, adv_id);
- svc_len = os_strlen(svc_name);
- info_len = sizeof(adv_id) + sizeof(config_methods) + sizeof(u8) +
- svc_len;
- if (info_len + *total_len > MAX_SVC_ADV_LEN) {
- p2p_dbg(p2p,
- "Unsufficient buffer, failed to add advertised service info");
- return -1;
- }
- if (svc_len > 255) {
- p2p_dbg(p2p,
- "Invalid service name length (%u bytes), failed to add advertised service info",
- (unsigned int) svc_len);
- return -1;
- }
- if (*ie_len) {
- int ie_data_len = (*pos - *ie_len) - 1;
- if (ie_data_len < 0 || ie_data_len > 255) {
- p2p_dbg(p2p,
- "Invalid IE length, failed to add advertised service info");
- return -1;
- }
- remaining = 255 - ie_data_len;
- } else {
- /*
- * Adding new P2P IE header takes 6 extra bytes:
- * - 2 byte IE header (1 byte IE id and 1 byte length)
- * - 4 bytes of IE_VENDOR_TYPE are reduced from 255 below
- */
- *ie_len = p2p_buf_add_ie_hdr(buf);
- remaining = 255 - 4;
- }
- if (remaining < sizeof(u32) + sizeof(u16) + sizeof(u8)) {
- /*
- * Split adv_id, config_methods, and svc_name_len between two
- * IEs.
- */
- size_t front = remaining;
- size_t back = sizeof(u32) + sizeof(u16) + sizeof(u8) - front;
- u8 holder[sizeof(u32) + sizeof(u16) + sizeof(u8)];
- WPA_PUT_LE32(holder, adv_id);
- WPA_PUT_BE16(&holder[sizeof(u32)], config_methods);
- holder[sizeof(u32) + sizeof(u16)] = svc_len;
- if (front)
- wpabuf_put_data(buf, holder, front);
- p2p_buf_update_ie_hdr(buf, *ie_len);
- *ie_len = p2p_buf_add_ie_hdr(buf);
- wpabuf_put_data(buf, &holder[front], back);
- remaining = 255 - 4 - (sizeof(u32) + sizeof(u16) + sizeof(u8)) -
- back;
- } else {
- wpabuf_put_le32(buf, adv_id);
- wpabuf_put_be16(buf, config_methods);
- wpabuf_put_u8(buf, svc_len);
- remaining -= sizeof(adv_id) + sizeof(config_methods) +
- sizeof(u8);
- }
- if (remaining < svc_len) {
- /* split svc_name between two or three IEs */
- size_t front = remaining;
- size_t back = svc_len - front;
- if (front)
- wpabuf_put_data(buf, svc_name, front);
- p2p_buf_update_ie_hdr(buf, *ie_len);
- *ie_len = p2p_buf_add_ie_hdr(buf);
- /* In rare cases, we must split across 3 attributes */
- if (back > 255 - 4) {
- wpabuf_put_data(buf, &svc_name[front], 255 - 4);
- back -= 255 - 4;
- front += 255 - 4;
- p2p_buf_update_ie_hdr(buf, *ie_len);
- *ie_len = p2p_buf_add_ie_hdr(buf);
- }
- wpabuf_put_data(buf, &svc_name[front], back);
- remaining = 255 - 4 - back;
- } else {
- wpabuf_put_data(buf, svc_name, svc_len);
- remaining -= svc_len;
- }
- p2p_buf_update_ie_hdr(buf, *ie_len);
- /* set *ie_len to NULL if a new IE has to be added on the next call */
- if (!remaining)
- *ie_len = NULL;
- /* set *pos to point to the next byte to update */
- *pos = wpabuf_put(buf, 0);
- *total_len += info_len;
- WPA_PUT_LE16(attr_len, (u16) *total_len);
- return 0;
- }
- void p2p_buf_add_service_instance(struct wpabuf *buf, struct p2p_data *p2p,
- u8 hash_count, const u8 *hash,
- struct p2ps_advertisement *adv_list)
- {
- struct p2ps_advertisement *adv;
- int p2ps_wildcard;
- size_t total_len;
- struct wpabuf *tmp_buf = NULL;
- u8 *pos, *attr_len, *ie_len = NULL;
- if (!adv_list || !hash || !hash_count)
- return;
- wpa_hexdump(MSG_DEBUG, "P2PS: Probe Request service hash values",
- hash, hash_count * P2PS_HASH_LEN);
- p2ps_wildcard = p2ps_wildcard_hash(p2p, hash, hash_count) &&
- p2p_wfa_service_adv(p2p);
- /* Allocate temp buffer, allowing for overflow of 1 instance */
- tmp_buf = wpabuf_alloc(MAX_SVC_ADV_IE_LEN + 256 + P2PS_HASH_LEN);
- if (!tmp_buf)
- return;
- /*
- * Attribute data can be split into a number of IEs. Start with the
- * first IE and the attribute headers here.
- */
- ie_len = p2p_buf_add_ie_hdr(tmp_buf);
- total_len = 0;
- wpabuf_put_u8(tmp_buf, P2P_ATTR_ADVERTISED_SERVICE);
- attr_len = wpabuf_put(tmp_buf, sizeof(u16));
- WPA_PUT_LE16(attr_len, (u16) total_len);
- p2p_buf_update_ie_hdr(tmp_buf, ie_len);
- pos = wpabuf_put(tmp_buf, 0);
- if (p2ps_wildcard) {
- /* org.wi-fi.wfds match found */
- p2p_buf_add_service_info(tmp_buf, p2p, 0, 0, P2PS_WILD_HASH_STR,
- &ie_len, &pos, &total_len, attr_len);
- }
- /* add advertised service info of matching services */
- for (adv = adv_list; adv && total_len <= MAX_SVC_ADV_LEN;
- adv = adv->next) {
- const u8 *test = hash;
- u8 i;
- for (i = 0; i < hash_count; i++) {
- /* exact name hash match */
- if (os_memcmp(test, adv->hash, P2PS_HASH_LEN) == 0 &&
- p2p_buf_add_service_info(tmp_buf, p2p,
- adv->id,
- adv->config_methods,
- adv->svc_name,
- &ie_len, &pos,
- &total_len,
- attr_len))
- break;
- test += P2PS_HASH_LEN;
- }
- }
- if (total_len)
- wpabuf_put_buf(buf, tmp_buf);
- wpabuf_free(tmp_buf);
- }
- void p2p_buf_add_session_id(struct wpabuf *buf, u32 id, const u8 *mac)
- {
- if (!buf || !mac)
- return;
- /* Session ID Info */
- wpabuf_put_u8(buf, P2P_ATTR_SESSION_ID);
- wpabuf_put_le16(buf, (u16) (sizeof(u32) + ETH_ALEN));
- wpabuf_put_le32(buf, id);
- wpabuf_put_data(buf, mac, ETH_ALEN);
- wpa_printf(MSG_DEBUG, "P2P: * Session ID Info (%x) " MACSTR,
- id, MAC2STR(mac));
- }
- void p2p_buf_add_feature_capability(struct wpabuf *buf, u16 len, const u8 *mask)
- {
- if (!buf || !len || !mask)
- return;
- /* Feature Capability */
- wpabuf_put_u8(buf, P2P_ATTR_FEATURE_CAPABILITY);
- wpabuf_put_le16(buf, len);
- wpabuf_put_data(buf, mask, len);
- wpa_printf(MSG_DEBUG, "P2P: * Feature Capability (%d)", len);
- }
- void p2p_buf_add_persistent_group_info(struct wpabuf *buf, const u8 *dev_addr,
- const u8 *ssid, size_t ssid_len)
- {
- /* P2P Group ID */
- wpabuf_put_u8(buf, P2P_ATTR_PERSISTENT_GROUP);
- wpabuf_put_le16(buf, ETH_ALEN + ssid_len);
- wpabuf_put_data(buf, dev_addr, ETH_ALEN);
- wpabuf_put_data(buf, ssid, ssid_len);
- wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID " MACSTR,
- MAC2STR(dev_addr));
- }
- static int p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr,
- const char *val)
- {
- size_t len;
- len = val ? os_strlen(val) : 0;
- if (wpabuf_tailroom(buf) < 4 + len)
- return -1;
- wpabuf_put_be16(buf, attr);
- #ifndef CONFIG_WPS_STRICT
- if (len == 0) {
- /*
- * Some deployed WPS implementations fail to parse zeor-length
- * attributes. As a workaround, send a space character if the
- * device attribute string is empty.
- */
- if (wpabuf_tailroom(buf) < 3)
- return -1;
- wpabuf_put_be16(buf, 1);
- wpabuf_put_u8(buf, ' ');
- return 0;
- }
- #endif /* CONFIG_WPS_STRICT */
- wpabuf_put_be16(buf, len);
- if (val)
- wpabuf_put_data(buf, val, len);
- return 0;
- }
- int p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id,
- int all_attr)
- {
- u8 *len;
- int i;
- if (wpabuf_tailroom(buf) < 6)
- return -1;
- wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
- len = wpabuf_put(buf, 1);
- wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);
- if (wps_build_version(buf) < 0)
- return -1;
- if (all_attr) {
- if (wpabuf_tailroom(buf) < 5)
- return -1;
- wpabuf_put_be16(buf, ATTR_WPS_STATE);
- wpabuf_put_be16(buf, 1);
- wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED);
- }
- if (pw_id >= 0) {
- if (wpabuf_tailroom(buf) < 6)
- return -1;
- /* Device Password ID */
- wpabuf_put_be16(buf, ATTR_DEV_PASSWORD_ID);
- wpabuf_put_be16(buf, 2);
- wpa_printf(MSG_DEBUG, "P2P: WPS IE Device Password ID: %d",
- pw_id);
- wpabuf_put_be16(buf, pw_id);
- }
- if (all_attr) {
- if (wpabuf_tailroom(buf) < 5)
- return -1;
- wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE);
- wpabuf_put_be16(buf, 1);
- wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO);
- if (wps_build_uuid_e(buf, p2p->cfg->uuid) < 0 ||
- p2p_add_wps_string(buf, ATTR_MANUFACTURER,
- p2p->cfg->manufacturer) < 0 ||
- p2p_add_wps_string(buf, ATTR_MODEL_NAME,
- p2p->cfg->model_name) < 0 ||
- p2p_add_wps_string(buf, ATTR_MODEL_NUMBER,
- p2p->cfg->model_number) < 0 ||
- p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER,
- p2p->cfg->serial_number) < 0)
- return -1;
- if (wpabuf_tailroom(buf) < 4 + WPS_DEV_TYPE_LEN)
- return -1;
- wpabuf_put_be16(buf, ATTR_PRIMARY_DEV_TYPE);
- wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN);
- wpabuf_put_data(buf, p2p->cfg->pri_dev_type, WPS_DEV_TYPE_LEN);
- if (p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name)
- < 0)
- return -1;
- if (wpabuf_tailroom(buf) < 6)
- return -1;
- wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
- wpabuf_put_be16(buf, 2);
- wpabuf_put_be16(buf, p2p->cfg->config_methods);
- }
- if (wps_build_wfa_ext(buf, 0, NULL, 0) < 0)
- return -1;
- if (all_attr && p2p->cfg->num_sec_dev_types) {
- if (wpabuf_tailroom(buf) <
- 4 + WPS_DEV_TYPE_LEN * p2p->cfg->num_sec_dev_types)
- return -1;
- wpabuf_put_be16(buf, ATTR_SECONDARY_DEV_TYPE_LIST);
- wpabuf_put_be16(buf, WPS_DEV_TYPE_LEN *
- p2p->cfg->num_sec_dev_types);
- wpabuf_put_data(buf, p2p->cfg->sec_dev_type,
- WPS_DEV_TYPE_LEN *
- p2p->cfg->num_sec_dev_types);
- }
- /* Add the WPS vendor extensions */
- for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
- if (p2p->wps_vendor_ext[i] == NULL)
- break;
- if (wpabuf_tailroom(buf) <
- 4 + wpabuf_len(p2p->wps_vendor_ext[i]))
- continue;
- wpabuf_put_be16(buf, ATTR_VENDOR_EXT);
- wpabuf_put_be16(buf, wpabuf_len(p2p->wps_vendor_ext[i]));
- wpabuf_put_buf(buf, p2p->wps_vendor_ext[i]);
- }
- p2p_buf_update_ie_hdr(buf, len);
- return 0;
- }
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