int p2p_send_prov_disc_req(struct p2p_data *p2p, struct p2p_device *dev,
int join, int force_freq)
{
struct wpabuf *req;
int freq;
if (force_freq > 0)
freq = force_freq;
else
freq = dev->listen_freq > 0 ? dev->listen_freq :
dev->oper_freq;
if (freq <= 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: No Listen/Operating frequency known for the "
"peer " MACSTR " to send Provision Discovery Request",
MAC2STR(dev->info.p2p_device_addr));
return -1;
}
if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
if (!(dev->info.dev_capab &
P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Cannot use PD with P2P Device " MACSTR
" that is in a group and is not discoverable",
MAC2STR(dev->info.p2p_device_addr));
return -1;
}
/* TODO: use device discoverability request through GO */
}
dev->dialog_token++;
if (dev->dialog_token == 0)
dev->dialog_token = 1;
req = p2p_build_prov_disc_req(p2p, dev->dialog_token,
dev->req_config_methods,
join ? dev : NULL);
if (req == NULL)
return -1;
if (p2p->state != P2P_IDLE)
p2p_stop_listen_for_freq(p2p, freq);
p2p->pending_action_state = P2P_PENDING_PD;
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), 200) < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Failed to send Action frame");
wpabuf_free(req);
return -1;
}
os_memcpy(p2p->pending_pd_devaddr, dev->info.p2p_device_addr, ETH_ALEN);
wpabuf_free(req);
return 0;
}
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;
}
int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev,
const u8 *go_dev_addr)
{
struct wpabuf *req;
int freq;
freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
if (freq <= 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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);
if (req == NULL)
return -1;
if (p2p->state != P2P_IDLE)
p2p_stop_listen_for_freq(p2p, freq);
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"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), 200) < 0) {
wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
"P2P: Failed to send Action frame");
/* Use P2P find to recover and retry */
p2p_set_timeout(p2p, 0, 0);
}
wpabuf_free(req);
return 0;
}
int p2p_send_prov_disc_req(struct p2p_data *p2p, struct p2p_device *dev,
int join, int force_freq)
{
struct wpabuf *req;
int freq;
if (force_freq > 0)
freq = force_freq;
else
freq = dev->listen_freq > 0 ? dev->listen_freq :
dev->oper_freq;
if (freq <= 0) {
p2p_dbg(p2p, "No Listen/Operating frequency known for the peer "
MACSTR " to send Provision Discovery Request",
MAC2STR(dev->info.p2p_device_addr));
return -1;
}
if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
if (!(dev->info.dev_capab &
P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
p2p_dbg(p2p, "Cannot use PD with P2P Device " MACSTR
" that is in a group and is not discoverable",
MAC2STR(dev->info.p2p_device_addr));
return -1;
}
/* TODO: use device discoverability request through GO */
}
if (p2p->p2ps_prov) {
if (p2p->p2ps_prov->status == P2P_SC_SUCCESS_DEFERRED) {
if (p2p->p2ps_prov->method == WPS_CONFIG_DISPLAY)
dev->req_config_methods = WPS_CONFIG_KEYPAD;
else if (p2p->p2ps_prov->method == WPS_CONFIG_KEYPAD)
dev->req_config_methods = WPS_CONFIG_DISPLAY;
else
dev->req_config_methods = WPS_CONFIG_P2PS;
} else {
/* Order of preference, based on peer's capabilities */
if (p2p->p2ps_prov->method)
dev->req_config_methods =
p2p->p2ps_prov->method;
else if (dev->info.config_methods & WPS_CONFIG_P2PS)
dev->req_config_methods = WPS_CONFIG_P2PS;
else if (dev->info.config_methods & WPS_CONFIG_DISPLAY)
dev->req_config_methods = WPS_CONFIG_DISPLAY;
else
dev->req_config_methods = WPS_CONFIG_KEYPAD;
}
p2p_dbg(p2p,
"Building PD Request based on P2PS config method 0x%x status %d --> req_config_methods 0x%x",
p2p->p2ps_prov->method, p2p->p2ps_prov->status,
dev->req_config_methods);
if (p2p_prepare_channel(p2p, dev, p2p->p2ps_prov->force_freq,
p2p->p2ps_prov->pref_freq, 1) < 0)
return -1;
}
req = p2p_build_prov_disc_req(p2p, dev, join);
if (req == NULL)
return -1;
if (p2p->state != P2P_IDLE)
p2p_stop_listen_for_freq(p2p, freq);
p2p->pending_action_state = P2P_PENDING_PD;
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), 200) < 0) {
p2p_dbg(p2p, "Failed to send Action frame");
wpabuf_free(req);
return -1;
}
os_memcpy(p2p->pending_pd_devaddr, dev->info.p2p_device_addr, ETH_ALEN);
wpabuf_free(req);
return 0;
}
void p2p_process_prov_disc_resp(struct p2p_data *p2p, const u8 *sa,
const u8 *data, size_t len)
{
struct p2p_message msg;
struct p2p_device *dev;
u16 report_config_methods = 0, req_config_methods;
u8 status = P2P_SC_SUCCESS;
u32 adv_id = 0;
u8 conncap = P2PS_SETUP_NEW;
u8 adv_mac[ETH_ALEN];
const u8 *group_mac;
int passwd_id = DEV_PW_DEFAULT;
int p2ps_seeker;
if (p2p_parse(data, len, &msg))
return;
if (p2p->p2ps_prov && p2p_validate_p2ps_pd_resp(p2p, &msg)) {
p2p_parse_free(&msg);
return;
}
/* Parse the P2PS members present */
if (msg.status)
status = *msg.status;
group_mac = msg.intended_addr;
if (msg.adv_mac)
os_memcpy(adv_mac, msg.adv_mac, ETH_ALEN);
else
os_memset(adv_mac, 0, ETH_ALEN);
if (msg.adv_id)
adv_id = WPA_GET_LE32(msg.adv_id);
if (msg.conn_cap) {
conncap = *msg.conn_cap;
/* Switch bits to local relative */
switch (conncap) {
case P2PS_SETUP_GROUP_OWNER:
conncap = P2PS_SETUP_CLIENT;
break;
case P2PS_SETUP_CLIENT:
conncap = P2PS_SETUP_GROUP_OWNER;
break;
}
}
p2p_dbg(p2p, "Received Provision Discovery Response from " MACSTR
" with config methods 0x%x",
MAC2STR(sa), msg.wps_config_methods);
dev = p2p_get_device(p2p, sa);
if (dev == NULL || !dev->req_config_methods) {
p2p_dbg(p2p, "Ignore Provision Discovery Response from " MACSTR
" with no pending request", MAC2STR(sa));
p2p_parse_free(&msg);
return;
} else if (msg.wfd_subelems) {
wpabuf_free(dev->info.wfd_subelems);
dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
}
if (dev->dialog_token != msg.dialog_token) {
p2p_dbg(p2p, "Ignore Provision Discovery Response with unexpected Dialog Token %u (expected %u)",
msg.dialog_token, dev->dialog_token);
p2p_parse_free(&msg);
return;
}
if (p2p->pending_action_state == P2P_PENDING_PD) {
os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
}
p2ps_seeker = p2p->p2ps_prov && p2p->p2ps_prov->pd_seeker;
/*
* Use a local copy of the requested config methods since
* p2p_reset_pending_pd() can clear this in the peer entry.
*/
req_config_methods = dev->req_config_methods;
/*
* If the response is from the peer to whom a user initiated request
* was sent earlier, we reset that state info here.
*/
if (p2p->user_initiated_pd &&
os_memcmp(p2p->pending_pd_devaddr, sa, ETH_ALEN) == 0)
p2p_reset_pending_pd(p2p);
if (msg.wps_config_methods != req_config_methods) {
p2p_dbg(p2p, "Peer rejected our Provision Discovery Request (received config_methods 0x%x expected 0x%x",
msg.wps_config_methods, req_config_methods);
if (p2p->cfg->prov_disc_fail)
p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
P2P_PROV_DISC_REJECTED,
adv_id, adv_mac, NULL);
p2p_parse_free(&msg);
p2ps_prov_free(p2p);
goto out;
}
report_config_methods = req_config_methods;
dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY |
P2P_DEV_PD_PEER_KEYPAD |
P2P_DEV_PD_PEER_P2PS);
if (req_config_methods & WPS_CONFIG_DISPLAY) {
p2p_dbg(p2p, "Peer " MACSTR
" accepted to show a PIN on display", MAC2STR(sa));
dev->flags |= P2P_DEV_PD_PEER_DISPLAY;
passwd_id = DEV_PW_REGISTRAR_SPECIFIED;
} else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
p2p_dbg(p2p, "Peer " MACSTR
" accepted to write our PIN using keypad",
MAC2STR(sa));
dev->flags |= P2P_DEV_PD_PEER_KEYPAD;
passwd_id = DEV_PW_USER_SPECIFIED;
} else if (msg.wps_config_methods & WPS_CONFIG_P2PS) {
p2p_dbg(p2p, "Peer " MACSTR " accepted P2PS PIN",
MAC2STR(sa));
dev->flags |= P2P_DEV_PD_PEER_P2PS;
passwd_id = DEV_PW_P2PS_DEFAULT;
}
if ((status == P2P_SC_SUCCESS || status == P2P_SC_SUCCESS_DEFERRED) &&
p2p->p2ps_prov) {
dev->oper_freq = 0;
/*
* Save the reported channel list and operating frequency.
* Note that the specification mandates that the responder
* should include in the channel list only channels reported by
* the initiator, so this is only a sanity check, and if this
* fails the flow would continue, although it would probably
* fail. Same is true for the operating channel.
*/
if (msg.channel_list && msg.channel_list_len &&
p2p_peer_channels_check(p2p, &p2p->channels, dev,
msg.channel_list,
msg.channel_list_len) < 0)
p2p_dbg(p2p, "P2PS PD Response - no common channels");
if (msg.operating_channel) {
if (p2p_channels_includes(&p2p->channels,
msg.operating_channel[3],
msg.operating_channel[4]) &&
p2p_channels_includes(&dev->channels,
msg.operating_channel[3],
msg.operating_channel[4])) {
dev->oper_freq =
p2p_channel_to_freq(
msg.operating_channel[3],
msg.operating_channel[4]);
} else {
p2p_dbg(p2p,
"P2PS PD Response - invalid operating channel");
}
}
if (p2p->cfg->p2ps_prov_complete) {
int freq = 0;
if (conncap == P2PS_SETUP_GROUP_OWNER) {
u8 tmp;
/*
* Re-select the operating channel as it is
* possible that original channel is no longer
* valid. This should not really fail.
*/
if (p2p_go_select_channel(p2p, dev, &tmp) < 0)
p2p_dbg(p2p,
"P2PS PD channel selection failed");
freq = p2p_channel_to_freq(p2p->op_reg_class,
p2p->op_channel);
if (freq < 0)
freq = 0;
}
p2p->cfg->p2ps_prov_complete(
p2p->cfg->cb_ctx, status, sa, adv_mac,
p2p->p2ps_prov->session_mac,
group_mac, adv_id, p2p->p2ps_prov->session_id,
conncap, passwd_id, msg.persistent_ssid,
msg.persistent_ssid_len, 1, 0, NULL,
msg.feature_cap, msg.feature_cap_len, freq,
msg.group_id ? msg.group_id + ETH_ALEN : NULL,
msg.group_id ? msg.group_id_len - ETH_ALEN : 0);
}
p2ps_prov_free(p2p);
} else if (status != P2P_SC_SUCCESS &&
status != P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
status != P2P_SC_SUCCESS_DEFERRED && p2p->p2ps_prov) {
if (p2p->cfg->p2ps_prov_complete)
p2p->cfg->p2ps_prov_complete(
p2p->cfg->cb_ctx, status, sa, adv_mac,
p2p->p2ps_prov->session_mac,
group_mac, adv_id, p2p->p2ps_prov->session_id,
0, 0, NULL, 0, 1, 0, NULL, NULL, 0, 0, NULL, 0);
p2ps_prov_free(p2p);
}
if (status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) {
if (p2p->cfg->remove_stale_groups) {
p2p->cfg->remove_stale_groups(p2p->cfg->cb_ctx,
dev->info.p2p_device_addr,
NULL, NULL, 0);
}
if (msg.session_info && msg.session_info_len) {
size_t info_len = msg.session_info_len;
char *deferred_sess_resp = os_malloc(2 * info_len + 1);
if (!deferred_sess_resp) {
p2p_parse_free(&msg);
p2ps_prov_free(p2p);
goto out;
}
utf8_escape((char *) msg.session_info, info_len,
deferred_sess_resp, 2 * info_len + 1);
if (p2p->cfg->prov_disc_fail)
p2p->cfg->prov_disc_fail(
p2p->cfg->cb_ctx, sa,
P2P_PROV_DISC_INFO_UNAVAILABLE,
adv_id, adv_mac,
deferred_sess_resp);
os_free(deferred_sess_resp);
} else
if (p2p->cfg->prov_disc_fail)
p2p->cfg->prov_disc_fail(
p2p->cfg->cb_ctx, sa,
P2P_PROV_DISC_INFO_UNAVAILABLE,
adv_id, adv_mac, NULL);
} else if (status != P2P_SC_SUCCESS) {
p2p_dbg(p2p, "Peer rejected our Provision Discovery Request");
if (p2p->cfg->prov_disc_fail)
p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
P2P_PROV_DISC_REJECTED,
adv_id, adv_mac, NULL);
p2p_parse_free(&msg);
p2ps_prov_free(p2p);
goto out;
}
/* Store the provisioning info */
dev->wps_prov_info = msg.wps_config_methods;
if (msg.intended_addr)
os_memcpy(dev->interface_addr, msg.intended_addr, ETH_ALEN);
p2p_parse_free(&msg);
out:
dev->req_config_methods = 0;
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
if (dev->flags & P2P_DEV_PD_BEFORE_GO_NEG) {
p2p_dbg(p2p, "Start GO Neg after the PD-before-GO-Neg workaround with "
MACSTR, MAC2STR(dev->info.p2p_device_addr));
dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
p2p_connect_send(p2p, dev);
return;
}
/*
* prov_disc_resp callback is used to generate P2P-PROV-DISC-ENTER-PIN,
* P2P-PROV-DISC-SHOW-PIN, and P2P-PROV-DISC-PBC-REQ events.
* Call it only for a legacy P2P PD or for P2PS PD scenarios where
* show/enter PIN events are needed.
*
* The callback is called in the following cases:
* 1. Legacy P2P PD response with a status SUCCESS
* 2. P2PS, advertiser method: DISPLAY, autoaccept: true,
* response status: SUCCESS, local method KEYPAD
* 3. P2PS, advertiser method: KEYPAD,Seeker side,
* response status: INFO_CURRENTLY_UNAVAILABLE,
* local method: DISPLAY
*/
if (p2p->cfg->prov_disc_resp &&
((status == P2P_SC_SUCCESS && !adv_id) ||
(p2ps_seeker && status == P2P_SC_SUCCESS &&
passwd_id == DEV_PW_REGISTRAR_SPECIFIED) ||
(p2ps_seeker &&
status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE &&
passwd_id == DEV_PW_USER_SPECIFIED)))
p2p->cfg->prov_disc_resp(p2p->cfg->cb_ctx, sa,
report_config_methods);
if (p2p->state == P2P_PD_DURING_FIND) {
p2p_stop_listen_for_freq(p2p, 0);
p2p_continue_find(p2p);
}
}
