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 intersection",
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);
}
/*
* Use the driver preferred frequency list extension if
* supported.
*/
p2p_check_pref_chan(p2p, go, dev, &msg);
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), 50) < 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));
return;
}
if (dev != p2p->invite_peer) {
p2p_dbg(p2p, "Ignore unexpected Invitation Response from peer "
MACSTR, MAC2STR(sa));
return;
}
if (p2p_parse(data, len, &msg))
return;
if (!msg.status) {
p2p_dbg(p2p, "Mandatory Status attribute missing in Invitation Response from "
MACSTR, MAC2STR(sa));
p2p_parse_free(&msg);
return;
}
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 freq = p2p_channel_to_freq(p2p->op_reg_class,
p2p->op_channel);
if (freq < 0)
freq = 0;
p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status,
msg.group_bssid, channels, sa,
freq);
}
p2p_parse_free(&msg);
p2p_clear_timeout(p2p);
p2p_set_state(p2p, P2P_IDLE);
p2p->invite_peer = NULL;
}
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;
}
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 intersection, *channels = NULL;
int persistent;
os_memset(group_bssid, 0, sizeof(group_bssid));
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Invitation Request from unknown peer "
MACSTR, MAC2STR(sa));
if (p2p_add_device(p2p, sa, rx_freq, 0, data + 1, len - 1)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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.
*/
wpa_printf(MSG_DEBUG, "P2P: Mandatory Invitation Flags "
"attribute missing from Invitation Request");
persistent = 1;
}
if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev,
msg.channel_list, msg.channel_list_len) <
0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: No common channels found");
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
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);
}
if (op_freq) {
if (p2p_freq_to_channel(p2p->cfg->country, op_freq,
®_class, &channel) < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Unknown forced freq %d MHz from "
"invitation_process()", op_freq);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
&intersection);
if (!p2p_channels_includes(&intersection, reg_class, channel))
{
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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 {
op_freq = p2p_channel_to_freq(p2p->cfg->country,
p2p->cfg->op_reg_class,
p2p->cfg->op_channel);
if (op_freq < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Unknown operational channel "
"(country=%c%c reg_class=%u channel=%u)",
p2p->cfg->country[0], p2p->cfg->country[1],
p2p->cfg->op_reg_class, p2p->cfg->op_channel);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
&intersection);
if (status == P2P_SC_SUCCESS) {
reg_class = p2p->cfg->op_reg_class;
channel = p2p->cfg->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->country,
p2p->cfg->reg_class,
p2p->cfg->channel);
if (freq < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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_len - ETH_ALEN <= 32) {
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);
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) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Failed to send Action frame");
}
out:
wpabuf_free(resp);
p2p_parse_free(&msg);
}
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 intersection, *channels = NULL;
int persistent;
os_memset(group_bssid, 0, sizeof(group_bssid));
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Received Invitation Request from " MACSTR " (freq=%d)",
MAC2STR(sa), rx_freq);
if (p2p_parse(data, len, &msg))
return;
#ifdef CONFIG_MTK_WFD
if(wfd_process_request_by_policy(p2p, &msg, &status,0) != 0) {
goto fail;
}
#endif
dev = p2p_get_device(p2p, sa);
#ifdef CONFIG_MTK_WFD
if(dev) {
p2p_copy_wfd_info(dev, 0, &msg, 0);
}
#endif
if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Invitation Request from unknown peer "
MACSTR, MAC2STR(sa));
if (p2p_add_device(p2p, sa, rx_freq, 0, data + 1, len - 1, 0))
{
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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.
*/
wpa_printf(MSG_DEBUG, "P2P: Mandatory Invitation Flags "
"attribute missing from Invitation Request");
persistent = 1;
}
if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev,
msg.channel_list, msg.channel_list_len) <
0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: No common channels found");
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
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);
}
if (op_freq) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Invitation "
"processing forced frequency %d MHz", op_freq);
if (p2p_freq_to_channel(p2p->cfg->country, op_freq,
®_class, &channel) < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Unknown forced freq %d MHz from "
"invitation_process()", op_freq);
status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
goto fail;
}
p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
&intersection);
if (!p2p_channels_includes(&intersection, reg_class, channel))
{
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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 {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: No forced channel from invitation processing - "
"figure out best one to use");
p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
&intersection);
/* Default to own configuration as a starting point */
p2p->op_reg_class = p2p->cfg->op_reg_class;
p2p->op_channel = p2p->cfg->op_channel;
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "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(
(const char *) msg.operating_channel,
msg.operating_channel[3],
msg.operating_channel[4]);
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "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];
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Use peer preference op_class %d "
"channel %d",
p2p->op_reg_class, p2p->op_channel);
} else {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Cannot use peer channel "
"preference");
}
}
if (!p2p_channels_includes(&intersection, p2p->op_reg_class,
p2p->op_channel)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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);
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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;
}
}
op_freq = p2p_channel_to_freq(p2p->cfg->country,
p2p->op_reg_class,
p2p->op_channel);
if (op_freq < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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;
}
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "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->country,
p2p->cfg->reg_class,
p2p->cfg->channel);
if (freq < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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_len - ETH_ALEN <= 32) {
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);
p2p->inv_status = status;
p2p->inv_op_freq = op_freq;
p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE;
#ifdef CONFIG_MTK_WFD
wfd_process_request_and_switch_role(p2p, &msg, 0);
#endif
if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
p2p->cfg->dev_addr,
wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Failed to send Action frame");
}
out:
wpabuf_free(resp);
p2p_parse_free(&msg);
}