blob: be069a582a18ef7904c15938a5428cad44100d44 [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 "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_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, P2P_OUI_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_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, P2P_OUI_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_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, P2P_OUI_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_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;
} else if (p2p->cfg->config_methods) {
methods |= p2p->cfg->config_methods &
(WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_DISPLAY |
WPS_CONFIG_KEYPAD);
} else {
methods |= WPS_CONFIG_PUSHBUTTON;
methods |= WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
}
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));
}
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);
}
static void p2p_add_wps_string(struct wpabuf *buf, enum wps_attribute attr,
const char *val)
{
size_t len;
wpabuf_put_be16(buf, attr);
len = val ? os_strlen(val) : 0;
#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.
*/
wpabuf_put_be16(buf, 1);
wpabuf_put_u8(buf, ' ');
return;
}
#endif /* CONFIG_WPS_STRICT */
wpabuf_put_be16(buf, len);
if (val)
wpabuf_put_data(buf, val, len);
}
void p2p_build_wps_ie(struct p2p_data *p2p, struct wpabuf *buf, int pw_id,
int all_attr)
{
u8 *len;
int i;
wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
len = wpabuf_put(buf, 1);
wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);
wps_build_version(buf);
if (all_attr) {
wpabuf_put_be16(buf, ATTR_WPS_STATE);
wpabuf_put_be16(buf, 1);
wpabuf_put_u8(buf, WPS_STATE_NOT_CONFIGURED);
}
if (pw_id >= 0) {
/* 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) {
wpabuf_put_be16(buf, ATTR_RESPONSE_TYPE);
wpabuf_put_be16(buf, 1);
wpabuf_put_u8(buf, WPS_RESP_ENROLLEE_INFO);
wps_build_uuid_e(buf, p2p->cfg->uuid);
p2p_add_wps_string(buf, ATTR_MANUFACTURER,
p2p->cfg->manufacturer);
p2p_add_wps_string(buf, ATTR_MODEL_NAME, p2p->cfg->model_name);
p2p_add_wps_string(buf, ATTR_MODEL_NUMBER,
p2p->cfg->model_number);
p2p_add_wps_string(buf, ATTR_SERIAL_NUMBER,
p2p->cfg->serial_number);
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);
p2p_add_wps_string(buf, ATTR_DEV_NAME, p2p->cfg->dev_name);
wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
wpabuf_put_be16(buf, 2);
wpabuf_put_be16(buf, p2p->cfg->config_methods);
}
wps_build_wfa_ext(buf, 0, NULL, 0);
if (all_attr && p2p->cfg->num_sec_dev_types) {
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);
}