blob: e4f40fe8fcc0f26b4927df2fec20188e5379b390 [file] [log] [blame]
/*
* 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/ieee802_11_common.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 struct weighted_pcl *pref_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(pref_freq_list[i].freq, &op_class,
&op_channel) == 0 &&
!(pref_freq_list[i].flag & WEIGHTED_PCL_EXCLUDE))
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(pref_freq_list[i].freq, &op_class,
&op_channel) < 0 ||
(pref_freq_list[i].flag & WEIGHTED_PCL_EXCLUDE)) {
wpa_printf(MSG_DEBUG, "Unsupported frequency %u MHz",
pref_freq_list[i].freq);
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, bool is_6ghz_capab)
{
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];
if (is_6ghz_op_class(c->reg_class) && !is_6ghz_capab)
continue;
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_P2PS)
methods |= WPS_CONFIG_P2PS;
else if (peer->wps_method == WPS_PIN_DISPLAY ||
peer->wps_method == WPS_PIN_KEYPAD)
methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
} 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) < 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;
}