/*
* Wi-Fi Direct - P2P Invitation procedure
* Copyright (c) 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/wpa_ctrl.h"
#include "p2p_i.h"
#include "p2p.h"
static struct wpabuf * p2p_build_invitation_req(struct p2p_data *p2p,
struct p2p_device *peer,
const u8 *go_dev_addr,
int dev_pw_id)
{
struct wpabuf *buf;
u8 *len;
const u8 *dev_addr;
size_t extra = 0;
#ifdef CONFIG_WIFI_DISPLAY
struct wpabuf *wfd_ie = p2p->wfd_ie_invitation;
if (wfd_ie && p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
size_t i;
for (i = 0; i < p2p->num_groups; i++) {
struct p2p_group *g = p2p->groups[i];
struct wpabuf *ie;
if (os_memcmp(p2p_group_get_interface_addr(g),
p2p->inv_bssid, ETH_ALEN) != 0)
continue;
ie = p2p_group_get_wfd_ie(g);
if (ie) {
wfd_ie = ie;
break;
}
}
}
if (wfd_ie)
extra = wpabuf_len(wfd_ie);
#endif /* CONFIG_WIFI_DISPLAY */
if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ])
extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ]);
buf = wpabuf_alloc(1000 + extra);
if (buf == NULL)
return NULL;
peer->dialog_token++;
if (peer->dialog_token == 0)
peer->dialog_token = 1;
p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_REQ,
peer->dialog_token);
len = p2p_buf_add_ie_hdr(buf);
if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO || !p2p->inv_persistent)
p2p_buf_add_config_timeout(buf, 0, 0);
else
p2p_buf_add_config_timeout(buf, p2p->go_timeout,
p2p->client_timeout);
p2p_buf_add_invitation_flags(buf, p2p->inv_persistent ?
P2P_INVITATION_FLAGS_TYPE : 0);
if (p2p->inv_role != P2P_INVITE_ROLE_CLIENT ||
!(peer->flags & P2P_DEV_NO_PREF_CHAN))
p2p_buf_add_operating_channel(buf, p2p->cfg->country,
p2p->op_reg_class,
p2p->op_channel);
if (p2p->inv_bssid_set)
p2p_buf_add_group_bssid(buf, p2p->inv_bssid);
p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels);
if (go_dev_addr)
dev_addr = go_dev_addr;
else if (p2p->inv_role == P2P_INVITE_ROLE_CLIENT)
dev_addr = peer->info.p2p_device_addr;
else
dev_addr = p2p->cfg->dev_addr;
p2p_buf_add_group_id(buf, dev_addr, p2p->inv_ssid, p2p->inv_ssid_len);
p2p_buf_add_device_info(buf, p2p, peer);
p2p_buf_update_ie_hdr(buf, len);
#ifdef CONFIG_WIFI_DISPLAY
if (wfd_ie)
wpabuf_put_buf(buf, wfd_ie);
#endif /* CONFIG_WIFI_DISPLAY */
if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ])
wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_INV_REQ]);
if (dev_pw_id >= 0) {
/* WSC IE in Invitation Request for NFC static handover */
p2p_build_wps_ie(p2p, buf, dev_pw_id, 0);
}
return buf;
}
static struct wpabuf * p2p_build_invitation_resp(struct p2p_data *p2p,
struct p2p_device *peer,
u8 dialog_token, u8 status,
const u8 *group_bssid,
u8 reg_class, u8 channel,
struct p2p_channels *channels)
{
struct wpabuf *buf;
u8 *len;
size_t extra = 0;
#ifdef CONFIG_WIFI_DISPLAY
struct wpabuf *wfd_ie = p2p->wfd_ie_invitation;
if (wfd_ie && group_bssid) {
size_t i;
for (i = 0; i < p2p->num_groups; i++) {
struct p2p_group *g = p2p->groups[i];
struct wpabuf *ie;
if (os_memcmp(p2p_group_get_interface_addr(g),
group_bssid, ETH_ALEN) != 0)
continue;
ie = p2p_group_get_wfd_ie(g);
if (ie) {
wfd_ie = ie;
break;
}
}
}
if (wfd_ie)
extra = wpabuf_len(wfd_ie);
#endif /* CONFIG_WIFI_DISPLAY */
if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP])
extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP]);
buf = wpabuf_alloc(1000 + extra);
if (buf == NULL)
return NULL;
p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_RESP,
dialog_token);
len = p2p_buf_add_ie_hdr(buf);
p2p_buf_add_status(buf, status);
p2p_buf_add_config_timeout(buf, 0, 0); /* FIX */
if (reg_class && channel)
p2p_buf_add_operating_channel(buf, p2p->cfg->country,
reg_class, channel);
if (group_bssid)
p2p_buf_add_group_bssid(buf, group_bssid);
if (channels)
p2p_buf_add_channel_list(buf, p2p->cfg->country, channels);
p2p_buf_update_ie_hdr(buf, len);
#ifdef CONFIG_WIFI_DISPLAY
if (wfd_ie)
wpabuf_put_buf(buf, wfd_ie);
#endif /* CONFIG_WIFI_DISPLAY */
if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP])
wpabuf_put_buf(buf, p2p->vendor_elem[VENDOR_ELEM_P2P_INV_RESP]);
return buf;
}
void p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa,
const u8 *data, size_t len, int rx_freq)
{
struct p2p_device *dev;
struct p2p_message msg;
struct wpabuf *resp = NULL;
u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
int freq;
int go = 0;
u8 group_bssid[ETH_ALEN], *bssid;
int op_freq = 0;
u8 reg_class = 0, channel = 0;
struct p2p_channels all_channels, intersection, *channels = NULL;
int persistent;
os_memset(group_bssid, 0, sizeof(group_bssid));
p2p_dbg(p2p, "Received Invitation Request from " MACSTR " (freq=%d)",
MAC2STR(sa), rx_freq);
if (p2p_parse(data, len, &msg))
return;
dev = p2p_get_device(p2p, sa);
if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
p2p_dbg(p2p, "Invitation Request from unknown peer " MACSTR,
MAC2STR(sa));
if (p2p_add_device(p2p, sa, rx_freq, NULL, 0, data + 1, len - 1,
0)) {
p2p_dbg(p2p, "Invitation Request add device failed "
MACSTR, MAC2STR(sa));
status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
goto fail;
}
dev = p2p_get_device(p2p, sa);
if (dev == NULL) {
p2p_dbg(p2p, "Reject Invitation Request from unknown peer "
MACSTR, MAC2STR(sa));
status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
goto fail;
}
}
if (!msg.group_id || !msg.channel_list) {
p2p_dbg(p2p, "Mandatory attribute missing in Invitation Request from "
MACSTR, MAC2STR(sa));
status = P2P_SC_FAIL_INVALID_PARAMS;
goto fail;
}
if (msg.invitation_flags)
persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE;
else {
/* Invitation Flags is a mandatory attribute starting from P2P
* spec 1.06. As a backwards compatibility mechanism, assume
* the request was for a persistent group if the attribute is
* missing.
*/
p2p_dbg(p2p, "Mandatory Invitation Flags attribute missing from Invitation Request");
persistent = 1;
}
p2p_channels_union(&p2p->cfg->channels, &p2p->cfg->cli_channels,
&all_channels);
if (p2p_peer_channels_check(p2p, &all_channels, dev,
msg.channel_list, msg.channel_list_len) <
0) {
p2p_dbg(p2p, "No common channels found");
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
p2p_channels_dump(p2p, "own channels", &p2p->cfg->channels);
p2p_channels_dump(p2p, "own client channels", &all_channels);
p2p_channels_dump(p2p, "peer channels", &dev->channels);
p2p_channels_intersect(&all_channels, &dev->channels,
&intersection);
p2p_channels_dump(p2p, "intersection", &intersection);
if (p2p->cfg->invitation_process) {
status = p2p->cfg->invitation_process(
p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id,
msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN,
&go, group_bssid, &op_freq, persistent, &intersection,
msg.dev_password_id_present ? msg.dev_password_id : -1);
}
if (go) {
p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
&intersection);
p2p_channels_dump(p2p, "intersection(GO)", &intersection);
if (intersection.reg_classes == 0) {
p2p_dbg(p2p, "No common channels found (GO)");
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
}
if (op_freq) {
p2p_dbg(p2p, "Invitation processing forced frequency %d MHz",
op_freq);
if (p2p_freq_to_channel(op_freq, ®_class, &channel) < 0) {
p2p_dbg(p2p, "Unknown forced freq %d MHz from invitation_process()",
op_freq);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
if (!p2p_channels_includes(&intersection, reg_class, channel))
{
p2p_dbg(p2p, "forced freq %d MHz not in the supported channels interaction",
op_freq);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
if (status == P2P_SC_SUCCESS)
channels = &intersection;
} else {
p2p_dbg(p2p, "No forced channel from invitation processing - figure out best one to use");
/* Default to own configuration as a starting point */
p2p->op_reg_class = p2p->cfg->op_reg_class;
p2p->op_channel = p2p->cfg->op_channel;
p2p_dbg(p2p, "Own default op_class %d channel %d",
p2p->op_reg_class, p2p->op_channel);
/* Use peer preference if specified and compatible */
if (msg.operating_channel) {
int req_freq;
req_freq = p2p_channel_to_freq(
msg.operating_channel[3],
msg.operating_channel[4]);
p2p_dbg(p2p, "Peer operating channel preference: %d MHz",
req_freq);
if (req_freq > 0 &&
p2p_channels_includes(&intersection,
msg.operating_channel[3],
msg.operating_channel[4])) {
p2p->op_reg_class = msg.operating_channel[3];
p2p->op_channel = msg.operating_channel[4];
p2p_dbg(p2p, "Use peer preference op_class %d channel %d",
p2p->op_reg_class, p2p->op_channel);
} else {
p2p_dbg(p2p, "Cannot use peer channel preference");
}
}
/* Reselect the channel only for the case of the GO */
if (go &&
!p2p_channels_includes(&intersection, p2p->op_reg_class,
p2p->op_channel)) {
p2p_dbg(p2p, "Initially selected channel (op_class %d channel %d) not in channel intersection - try to reselect",
p2p->op_reg_class, p2p->op_channel);
p2p_reselect_channel(p2p, &intersection);
p2p_dbg(p2p, "Re-selection result: op_class %d channel %d",
p2p->op_reg_class, p2p->op_channel);
if (!p2p_channels_includes(&intersection,
p2p->op_reg_class,
p2p->op_channel)) {
p2p_dbg(p2p, "Peer does not support selected operating channel (reg_class=%u channel=%u)",
p2p->op_reg_class, p2p->op_channel);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
} else if (go && !(dev->flags & P2P_DEV_FORCE_FREQ) &&
!p2p->cfg->cfg_op_channel) {
p2p_dbg(p2p, "Try to reselect channel selection with peer information received; previously selected op_class %u channel %u",
p2p->op_reg_class, p2p->op_channel);
p2p_reselect_channel(p2p, &intersection);
}
op_freq = p2p_channel_to_freq(p2p->op_reg_class,
p2p->op_channel);
if (op_freq < 0) {
p2p_dbg(p2p, "Unknown operational channel (country=%c%c reg_class=%u channel=%u)",
p2p->cfg->country[0], p2p->cfg->country[1],
p2p->op_reg_class, p2p->op_channel);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
p2p_dbg(p2p, "Selected operating channel - %d MHz", op_freq);
if (status == P2P_SC_SUCCESS) {
reg_class = p2p->op_reg_class;
channel = p2p->op_channel;
channels = &intersection;
}
}
fail:
if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid))
bssid = group_bssid;
else
bssid = NULL;
resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status,
bssid, reg_class, channel, channels);
if (resp == NULL)
goto out;
if (rx_freq > 0)
freq = rx_freq;
else
freq = p2p_channel_to_freq(p2p->cfg->reg_class,
p2p->cfg->channel);
if (freq < 0) {
p2p_dbg(p2p, "Unknown regulatory class/channel");
goto out;
}
/*
* Store copy of invitation data to be used when processing TX status
* callback for the Acton frame.
*/
os_memcpy(p2p->inv_sa, sa, ETH_ALEN);
if (msg.group_bssid) {
os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN);
p2p->inv_group_bssid_ptr = p2p->inv_group_bssid;
} else
p2p->inv_group_bssid_ptr = NULL;
if (msg.group_id) {
if (msg.group_id_len - ETH_ALEN <= SSID_MAX_LEN) {
os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN,
msg.group_id_len - ETH_ALEN);
p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN;
}
os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN);
} else {
p2p->inv_ssid_len = 0;
os_memset(p2p->inv_go_dev_addr, 0, ETH_ALEN);
}
p2p->inv_status = status;
p2p->inv_op_freq = op_freq;
p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE;
if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
p2p->cfg->dev_addr,
wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
p2p_dbg(p2p, "Failed to send Action frame");
}
out:
wpabuf_free(resp);
p2p_parse_free(&msg);
}
void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa,
const u8 *data, size_t len)
{
struct p2p_device *dev;
struct p2p_message msg;
struct p2p_channels intersection, *channels = NULL;
p2p_dbg(p2p, "Received Invitation Response from " MACSTR,
MAC2STR(sa));
dev = p2p_get_device(p2p, sa);
if (dev == NULL) {
p2p_dbg(p2p, "Ignore Invitation Response from unknown peer "
MACSTR, MAC2STR(sa));
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
return;
}
if (dev != p2p->invite_peer) {
p2p_dbg(p2p, "Ignore unexpected Invitation Response from peer "
MACSTR, MAC2STR(sa));
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
return;
}
if (p2p_parse(data, len, &msg)) {
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
return;
}
if (!msg.status) {
p2p_dbg(p2p, "Mandatory Status attribute missing in Invitation Response from "
MACSTR, MAC2STR(sa));
p2p_parse_free(&msg);
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
return;
}
/*
* We should not really receive a replayed response twice since
* duplicate frames are supposed to be dropped. However, not all drivers
* do that for pre-association frames. We did not use to verify dialog
* token matches for invitation response frames, but that check can be
* safely used to drop a replayed response to the previous Invitation
* Request in case the suggested operating channel was changed. This
* allows a duplicated reject frame to be dropped with the assumption
* that the real response follows after it.
*/
if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS &&
p2p->retry_invite_req_sent &&
msg.dialog_token != dev->dialog_token) {
p2p_dbg(p2p, "Unexpected Dialog Token %u (expected %u)",
msg.dialog_token, dev->dialog_token);
p2p_parse_free(&msg);
return;
}
if (*msg.status == P2P_SC_FAIL_NO_COMMON_CHANNELS &&
p2p->retry_invite_req &&
p2p_channel_random_social(&p2p->cfg->channels, &p2p->op_reg_class,
&p2p->op_channel) == 0) {
p2p->retry_invite_req = 0;
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
p2p_set_state(p2p, P2P_INVITE);
p2p_dbg(p2p, "Resend Invitation Request setting op_class %u channel %u as operating channel",
p2p->op_reg_class, p2p->op_channel);
p2p->retry_invite_req_sent = 1;
p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
p2p->invite_dev_pw_id);
p2p_parse_free(&msg);
return;
}
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p->retry_invite_req = 0;
if (!msg.channel_list && *msg.status == P2P_SC_SUCCESS) {
p2p_dbg(p2p, "Mandatory Channel List attribute missing in Invitation Response from "
MACSTR, MAC2STR(sa));
#ifdef CONFIG_P2P_STRICT
p2p_parse_free(&msg);
return;
#endif /* CONFIG_P2P_STRICT */
/* Try to survive without peer channel list */
channels = &p2p->channels;
} else if (!msg.channel_list) {
/* Non-success cases are not required to include Channel List */
channels = &p2p->channels;
} else if (p2p_peer_channels_check(p2p, &p2p->channels, dev,
msg.channel_list,
msg.channel_list_len) < 0) {
p2p_dbg(p2p, "No common channels found");
p2p_parse_free(&msg);
return;
} else {
p2p_channels_intersect(&p2p->channels, &dev->channels,
&intersection);
channels = &intersection;
}
if (p2p->cfg->invitation_result) {
int peer_oper_freq = 0;
int freq = p2p_channel_to_freq(p2p->op_reg_class,
p2p->op_channel);
if (freq < 0)
freq = 0;
if (msg.operating_channel) {
peer_oper_freq = p2p_channel_to_freq(
msg.operating_channel[3],
msg.operating_channel[4]);
if (peer_oper_freq < 0)
peer_oper_freq = 0;
}
p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status,
msg.group_bssid, channels, sa,
freq, peer_oper_freq);
}
p2p_parse_free(&msg);
p2p_clear_timeout(p2p);
p2p_set_state(p2p, P2P_IDLE);
p2p->invite_peer = NULL;
}
int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev,
const u8 *go_dev_addr, int dev_pw_id)
{
struct wpabuf *req;
int freq;
freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
if (freq <= 0)
freq = dev->oob_go_neg_freq;
if (freq <= 0) {
p2p_dbg(p2p, "No Listen/Operating frequency known for the peer "
MACSTR " to send Invitation Request",
MAC2STR(dev->info.p2p_device_addr));
return -1;
}
req = p2p_build_invitation_req(p2p, dev, go_dev_addr, dev_pw_id);
if (req == NULL)
return -1;
if (p2p->state != P2P_IDLE)
p2p_stop_listen_for_freq(p2p, freq);
p2p_dbg(p2p, "Sending Invitation Request");
p2p_set_state(p2p, P2P_INVITE);
p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST;
p2p->invite_peer = dev;
dev->invitation_reqs++;
if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
p2p->cfg->dev_addr, dev->info.p2p_device_addr,
wpabuf_head(req), wpabuf_len(req), 500) < 0) {
p2p_dbg(p2p, "Failed to send Action frame");
/* Use P2P find to recover and retry */
p2p_set_timeout(p2p, 0, 0);
} else {
dev->flags |= P2P_DEV_WAIT_INV_REQ_ACK;
}
wpabuf_free(req);
return 0;
}
void p2p_invitation_req_cb(struct p2p_data *p2p, int success)
{
p2p_dbg(p2p, "Invitation Request TX callback: success=%d", success);
if (p2p->invite_peer == NULL) {
p2p_dbg(p2p, "No pending Invite");
return;
}
if (success)
p2p->invite_peer->flags &= ~P2P_DEV_WAIT_INV_REQ_ACK;
/*
* Use P2P find, if needed, to find the other device from its listen
* channel.
*/
p2p_set_state(p2p, P2P_INVITE);
p2p_set_timeout(p2p, 0, success ? 500000 : 100000);
}
void p2p_invitation_resp_cb(struct p2p_data *p2p, int success)
{
p2p_dbg(p2p, "Invitation Response TX callback: success=%d", success);
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
if (!success)
p2p_dbg(p2p, "Assume Invitation Response was actually received by the peer even though Ack was not reported");
if (p2p->cfg->invitation_received) {
p2p->cfg->invitation_received(p2p->cfg->cb_ctx,
p2p->inv_sa,
p2p->inv_group_bssid_ptr,
p2p->inv_ssid, p2p->inv_ssid_len,
p2p->inv_go_dev_addr,
p2p->inv_status,
p2p->inv_op_freq);
}
}
int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
const u8 *bssid, const u8 *ssid, size_t ssid_len,
unsigned int force_freq, const u8 *go_dev_addr,
int persistent_group, unsigned int pref_freq, int dev_pw_id)
{
struct p2p_device *dev;
p2p_dbg(p2p, "Request to invite peer " MACSTR " role=%d persistent=%d "
"force_freq=%u",
MAC2STR(peer), role, persistent_group, force_freq);
if (bssid)
p2p_dbg(p2p, "Invitation for BSSID " MACSTR, MAC2STR(bssid));
if (go_dev_addr) {
p2p_dbg(p2p, "Invitation for GO Device Address " MACSTR,
MAC2STR(go_dev_addr));
os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN);
p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf;
} else
p2p->invite_go_dev_addr = NULL;
wpa_hexdump_ascii(MSG_DEBUG, "Invitation for SSID",
ssid, ssid_len);
if (dev_pw_id >= 0) {
p2p_dbg(p2p, "Invitation to use Device Password ID %d",
dev_pw_id);
}
p2p->invite_dev_pw_id = dev_pw_id;
p2p->retry_invite_req = role == P2P_INVITE_ROLE_GO &&
persistent_group && !force_freq;
p2p->retry_invite_req_sent = 0;
dev = p2p_get_device(p2p, peer);
if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0 &&
dev->oob_go_neg_freq <= 0)) {
p2p_dbg(p2p, "Cannot invite unknown P2P Device " MACSTR,
MAC2STR(peer));
return -1;
}
if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
role != P2P_INVITE_ROLE_CLIENT) < 0)
return -1;
if (persistent_group && role == P2P_INVITE_ROLE_CLIENT && !force_freq &&
!pref_freq)
dev->flags |= P2P_DEV_NO_PREF_CHAN;
else
dev->flags &= ~P2P_DEV_NO_PREF_CHAN;
if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
if (!(dev->info.dev_capab &
P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
p2p_dbg(p2p, "Cannot invite a P2P Device " MACSTR
" that is in a group and is not discoverable",
MAC2STR(peer));
}
/* TODO: use device discoverability request through GO */
}
dev->invitation_reqs = 0;
if (p2p->state != P2P_IDLE)
p2p_stop_find(p2p);
p2p->inv_role = role;
p2p->inv_bssid_set = bssid != NULL;
if (bssid)
os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN);
os_memcpy(p2p->inv_ssid, ssid, ssid_len);
p2p->inv_ssid_len = ssid_len;
p2p->inv_persistent = persistent_group;
return p2p_invite_send(p2p, dev, go_dev_addr, dev_pw_id);
}