/**
* p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
* @data: IEs from the message
* @len: Length of data buffer in octets
* @msg: Buffer for returning parsed attributes
* Returns: 0 on success, -1 on failure
*
* Note: Caller is responsible for clearing the msg data structure before
* calling this function.
*
* Note: Caller must free temporary memory allocations by calling
* p2p_parse_free() when the parsed data is not needed anymore.
*/
int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
{
struct ieee802_11_elems elems;
ieee802_11_parse_elems(data, len, &elems, 0);
if (elems.ds_params && elems.ds_params_len >= 1)
msg->ds_params = elems.ds_params;
if (elems.ssid)
msg->ssid = elems.ssid - 2;
msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
WPS_DEV_OUI_WFA);
if (msg->wps_attributes &&
p2p_parse_wps_ie(msg->wps_attributes, msg)) {
p2p_parse_free(msg);
return -1;
}
msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
P2P_IE_VENDOR_TYPE);
if (msg->p2p_attributes &&
p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
if (msg->p2p_attributes)
wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
msg->p2p_attributes);
p2p_parse_free(msg);
return -1;
}
return 0;
}
int p2p_parse_ies_separate(const u8 *wsc, size_t wsc_len, const u8 *p2p,
size_t p2p_len, struct p2p_message *msg)
{
os_memset(msg, 0, sizeof(*msg));
msg->wps_attributes = wpabuf_alloc_copy(wsc, wsc_len);
if (msg->wps_attributes &&
p2p_parse_wps_ie(msg->wps_attributes, msg)) {
p2p_parse_free(msg);
return -1;
}
msg->p2p_attributes = wpabuf_alloc_copy(p2p, p2p_len);
if (msg->p2p_attributes &&
p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
if (msg->p2p_attributes)
wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
msg->p2p_attributes);
p2p_parse_free(msg);
return -1;
}
return 0;
}
u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
{
struct p2p_message msg;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_p2p_ie(p2p_ie, &msg))
return 0;
if (!msg.capability)
return 0;
return msg.capability[1];
}
int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
{
struct p2p_message msg;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_p2p_ie(p2p_ie, &msg))
return 0;
if (!msg.manageability)
return 0;
return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED);
}
const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
{
struct p2p_message msg;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_p2p_ie(p2p_ie, &msg))
return NULL;
if (msg.p2p_device_addr)
return msg.p2p_device_addr;
if (msg.device_id)
return msg.device_id;
return NULL;
}
/**
* 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;
}
/**
* p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
* @data: IEs from the message
* @len: Length of data buffer in octets
* @msg: Buffer for returning parsed attributes
* Returns: 0 on success, -1 on failure
*
* Note: Caller is responsible for clearing the msg data structure before
* calling this function.
*
* Note: Caller must free temporary memory allocations by calling
* p2p_parse_free() when the parsed data is not needed anymore.
*/
int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
{
struct ieee802_11_elems elems;
ieee802_11_parse_elems(data, len, &elems, 0);
if (elems.ds_params)
msg->ds_params = elems.ds_params;
if (elems.ssid)
msg->ssid = elems.ssid - 2;
msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
WPS_DEV_OUI_WFA);
if (msg->wps_attributes &&
p2p_parse_wps_ie(msg->wps_attributes, msg)) {
p2p_parse_free(msg);
return -1;
}
msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
P2P_IE_VENDOR_TYPE);
if (msg->p2p_attributes &&
p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
if (msg->p2p_attributes)
wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
msg->p2p_attributes);
p2p_parse_free(msg);
return -1;
}
#ifdef CONFIG_WIFI_DISPLAY
if (elems.wfd) {
msg->wfd_subelems = ieee802_11_vendor_ie_concat(
data, len, WFD_IE_VENDOR_TYPE);
}
#endif /* CONFIG_WIFI_DISPLAY */
msg->pref_freq_list = elems.pref_freq_list;
msg->pref_freq_list_len = elems.pref_freq_list_len;
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;
}
/**
* p2p_attr_text - Build text format description of P2P IE attributes
* @data: P2P IE contents
* @buf: Buffer for returning text
* @end: Pointer to the end of the buf area
* Returns: Number of octets written to the buffer or -1 on faikure
*
* This function can be used to parse P2P IE contents into text format
* field=value lines.
*/
int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
{
struct p2p_message msg;
char *pos = buf;
int ret;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_p2p_ie(data, &msg))
return -1;
if (msg.capability) {
ret = os_snprintf(pos, end - pos,
"p2p_dev_capab=0x%x\n"
"p2p_group_capab=0x%x\n",
msg.capability[0], msg.capability[1]);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
if (msg.pri_dev_type) {
char devtype[WPS_DEV_TYPE_BUFSIZE];
ret = os_snprintf(pos, end - pos,
"p2p_primary_device_type=%s\n",
wps_dev_type_bin2str(msg.pri_dev_type,
devtype,
sizeof(devtype)));
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
msg.device_name);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
if (msg.p2p_device_addr) {
ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
"\n",
MAC2STR(msg.p2p_device_addr));
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
}
ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
msg.config_methods);
if (ret < 0 || ret >= end - pos)
return pos - buf;
pos += ret;
ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
pos, end);
if (ret < 0)
return pos - buf;
pos += ret;
return pos - buf;
}
