static struct wpabuf * wps_build_m1(struct wps_data *wps)
{
struct wpabuf *msg;
u16 config_methods;
if (random_get_bytes(wps->nonce_e, WPS_NONCE_LEN) < 0)
return NULL;
wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
wps->nonce_e, WPS_NONCE_LEN);
wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
msg = wpabuf_alloc(1000);
if (msg == NULL)
return NULL;
config_methods = wps->wps->config_methods;
if (wps->wps->ap && !wps->pbc_in_m1 &&
(wps->dev_password_len != 0 ||
(config_methods & WPS_CONFIG_DISPLAY))) {
/*
* These are the methods that the AP supports as an Enrollee
* for adding external Registrars, so remove PushButton.
*
* As a workaround for Windows 7 mechanism for probing WPS
* capabilities from M1, leave PushButton option if no PIN
* method is available or if WPS configuration enables PBC
* workaround.
*/
config_methods &= ~WPS_CONFIG_PUSHBUTTON;
config_methods &= ~(WPS_CONFIG_VIRT_PUSHBUTTON |
WPS_CONFIG_PHY_PUSHBUTTON);
}
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M1) ||
wps_build_uuid_e(msg, wps->uuid_e) ||
wps_build_mac_addr(msg, wps->mac_addr_e) ||
wps_build_enrollee_nonce(wps, msg) ||
wps_build_public_key(wps, msg) ||
wps_build_auth_type_flags(wps, msg) ||
wps_build_encr_type_flags(wps, msg) ||
wps_build_conn_type_flags(wps, msg) ||
wps_build_config_methods(msg, config_methods) ||
wps_build_wps_state(wps, msg) ||
wps_build_device_attrs(&wps->wps->dev, msg) ||
wps_build_rf_bands(&wps->wps->dev, msg,
wps->wps->rf_band_cb(wps->wps->cb_ctx)) ||
wps_build_assoc_state(wps, msg) ||
wps_build_dev_password_id(msg, wps->dev_pw_id) ||
wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
wps_build_os_version(&wps->wps->dev, msg) ||
wps_build_wfa_ext(msg, 0, NULL, 0) ||
wps_build_vendor_ext_m1(&wps->wps->dev, msg)) {
wpabuf_free(msg);
return NULL;
}
wps->state = RECV_M2;
return msg;
}
static struct wpabuf * wps_build_m1(struct wps_data *wps)
{
struct wpabuf *msg;
u16 methods;
if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
return NULL;
wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Nonce",
wps->nonce_e, WPS_NONCE_LEN);
wpa_printf(MSG_DEBUG, "WPS: Building Message M1");
msg = wpabuf_alloc(1000);
if (msg == NULL)
return NULL;
methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
if (wps->pbc)
methods |= WPS_CONFIG_PUSHBUTTON;
if (wps_build_version(msg) ||
wps_build_msg_type(msg, WPS_M1) ||
wps_build_uuid_e(msg, wps->uuid_e) ||
wps_build_mac_addr(wps, msg) ||
wps_build_enrollee_nonce(wps, msg) ||
wps_build_public_key(wps, msg) ||
wps_build_auth_type_flags(wps, msg) ||
wps_build_encr_type_flags(wps, msg) ||
wps_build_conn_type_flags(wps, msg) ||
wps_build_config_methods(msg, methods) ||
wps_build_wps_state(wps, msg) ||
wps_build_device_attrs(&wps->wps->dev, msg) ||
wps_build_rf_bands(&wps->wps->dev, msg) ||
wps_build_assoc_state(wps, msg) ||
wps_build_dev_password_id(msg, wps->dev_pw_id) ||
wps_build_config_error(msg, WPS_CFG_NO_ERROR) ||
wps_build_os_version(&wps->wps->dev, msg)) {
wpabuf_free(msg);
return NULL;
}
wps->state = RECV_M2;
return msg;
}