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/*
* SPDX-FileCopyrightText: 2020-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/defs.h"
#include "esp_dpp_i.h"
#include "esp_dpp.h"
#include "esp_wpa.h"
#include "esp_event.h"
#include "esp_wifi.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "esp_wps_i.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#ifdef CONFIG_DPP
static void *s_dpp_task_hdl = NULL;
static void *s_dpp_evt_queue = NULL;
static void *s_dpp_api_lock = NULL;
static bool s_dpp_listen_in_progress;
static struct esp_dpp_context_t s_dpp_ctx;
static wifi_action_rx_cb_t s_action_rx_cb = esp_supp_rx_action;
#define DPP_API_LOCK() os_mutex_lock(s_dpp_api_lock)
#define DPP_API_UNLOCK() os_mutex_unlock(s_dpp_api_lock)
struct action_rx_param {
u8 sa[ETH_ALEN];
u32 channel;
u32 frm_len;
u32 vendor_data_len;
struct ieee80211_action *action_frm;
};
esp_err_t esp_dpp_post_evt(uint32_t evt_id, uint32_t data)
{
dpp_event_t evt;
esp_err_t ret = ESP_OK;
evt.id = evt_id;
evt.data = data;
if (s_dpp_api_lock) {
DPP_API_LOCK();
} else {
ret = ESP_ERR_DPP_FAILURE;
goto end;
}
if (os_queue_send(s_dpp_evt_queue, &evt, os_task_ms_to_tick(10)) != TRUE) {
DPP_API_UNLOCK();
ret = ESP_ERR_DPP_FAILURE;
goto end;
}
if (evt_id != SIG_DPP_DEL_TASK) {
DPP_API_UNLOCK();
}
wpa_printf(MSG_DEBUG, "DPP: Sent event %d to DPP task", evt_id);
return ret;
end:
wpa_printf(MSG_ERROR, "DPP: Failed to send event %d to DPP task", evt_id);
return ret;
}
static uint8_t esp_dpp_deinit_auth(void)
{
esp_err_t ret = esp_dpp_post_evt(SIG_DPP_DEINIT_AUTH, 0);
if (ESP_OK != ret) {
wpa_printf(MSG_ERROR, "Failed to post DPP auth deinit to DPP Task(status=%d)", ret);
return ret;
}
return ESP_OK;
}
static void esp_dpp_call_cb(esp_supp_dpp_event_t evt, void *data)
{
if (s_dpp_ctx.dpp_auth) {
esp_dpp_deinit_auth();
}
s_dpp_ctx.dpp_event_cb(evt, data);
}
static void esp_dpp_auth_conf_wait_timeout(void *eloop_ctx, void *timeout_ctx)
{
if (!s_dpp_ctx.dpp_auth || !s_dpp_ctx.dpp_auth->waiting_auth_conf) {
return;
}
wpa_printf(MSG_DEBUG,
"DPP: Terminate authentication exchange due to Auth Confirm timeout");
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_DPP_AUTH_TIMEOUT);
}
esp_err_t esp_dpp_send_action_frame(uint8_t *dest_mac, const uint8_t *buf, uint32_t len,
uint8_t channel, uint32_t wait_time_ms)
{
wifi_action_tx_req_t *req = os_zalloc(sizeof(*req) + len);;
if (!req) {
return ESP_FAIL;
}
req->ifx = WIFI_IF_STA;
memcpy(req->dest_mac, dest_mac, ETH_ALEN);
req->no_ack = false;
req->data_len = len;
req->rx_cb = s_action_rx_cb;
memcpy(req->data, buf, req->data_len);
wpa_printf(MSG_DEBUG, "DPP: Mgmt Tx - MAC:" MACSTR ", Channel-%d, WaitT-%d",
MAC2STR(dest_mac), channel, wait_time_ms);
if (ESP_OK != esp_wifi_action_tx_req(WIFI_OFFCHAN_TX_REQ, channel,
wait_time_ms, req)) {
wpa_printf(MSG_ERROR, "DPP: Failed to perform offchannel operation");
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_DPP_TX_FAILURE);
os_free(req);
return ESP_FAIL;
}
os_free(req);
return ESP_OK;
}
static void esp_dpp_rx_auth_req(struct action_rx_param *rx_param, uint8_t *dpp_data)
{
size_t len = rx_param->vendor_data_len - 2;
const u8 *r_bootstrap, *i_bootstrap;
u16 r_bootstrap_len, i_bootstrap_len;
struct dpp_bootstrap_info *own_bi;
int rc;
wpa_printf(MSG_INFO, "DPP: Authentication Request from " MACSTR, MAC2STR(rx_param->sa));
r_bootstrap = dpp_get_attr(dpp_data, len, DPP_ATTR_R_BOOTSTRAP_KEY_HASH,
&r_bootstrap_len);
if (!r_bootstrap || r_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_INFO, "DPP: Missing or invalid Responder Bootstrapping Key Hash attribute");
rc = ESP_ERR_DPP_INVALID_ATTR;
goto fail;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Responder Bootstrapping Key Hash", r_bootstrap, r_bootstrap_len);
i_bootstrap = dpp_get_attr(dpp_data, len, DPP_ATTR_I_BOOTSTRAP_KEY_HASH,
&i_bootstrap_len);
if (!i_bootstrap || i_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_INFO, "DPP: Missing or invalid Initiator Bootstrapping Key Hash attribute");
rc = ESP_ERR_DPP_INVALID_ATTR;
goto fail;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Initiator Bootstrapping Key Hash", i_bootstrap, i_bootstrap_len);
own_bi = dpp_bootstrap_get_id(s_dpp_ctx.dpp_global, s_dpp_ctx.id);
/* Try to find own and peer bootstrapping key matches based on the
* received hash values */
if (os_memcmp(own_bi->pubkey_hash, r_bootstrap, SHA256_MAC_LEN)) {
wpa_printf(MSG_INFO, "DPP: No matching own bootstrapping key found as responder - ignore message");
rc = ESP_ERR_DPP_INVALID_ATTR;
goto fail;
}
if (s_dpp_ctx.dpp_auth) {
wpa_printf(MSG_DEBUG, "DPP: Already in DPP authentication exchange - ignore new one");
return;
}
s_dpp_ctx.dpp_auth = dpp_auth_req_rx(NULL, DPP_CAPAB_ENROLLEE, 0, NULL,
own_bi, rx_param->channel,
(const u8 *)&rx_param->action_frm->u.public_action.v, dpp_data, len);
os_memcpy(s_dpp_ctx.dpp_auth->peer_mac_addr, rx_param->sa, ETH_ALEN);
wpa_printf(MSG_DEBUG, "DPP: Sending authentication response.");
esp_dpp_send_action_frame(rx_param->sa, wpabuf_head(s_dpp_ctx.dpp_auth->resp_msg),
wpabuf_len(s_dpp_ctx.dpp_auth->resp_msg),
rx_param->channel, OFFCHAN_TX_WAIT_TIME);
eloop_cancel_timeout(esp_dpp_auth_conf_wait_timeout, NULL, NULL);
eloop_register_timeout(ESP_DPP_AUTH_TIMEOUT_SECS, 0, esp_dpp_auth_conf_wait_timeout, NULL, NULL);
return;
fail:
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)rc);
}
static void gas_query_req_tx(struct dpp_authentication *auth)
{
struct wpabuf *buf;
int supp_op_classes[] = {81, 0};
buf = dpp_build_conf_req_helper(auth, NULL, 0, NULL,
supp_op_classes);
if (!buf) {
wpa_printf(MSG_DEBUG, "DPP: No configuration request data available");
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_DPP_FAILURE);
return;
}
wpa_printf(MSG_DEBUG, "DPP: GAS request to " MACSTR " (chan %u)",
MAC2STR(auth->peer_mac_addr), auth->curr_chan);
esp_dpp_send_action_frame(auth->peer_mac_addr, wpabuf_head(buf), wpabuf_len(buf),
auth->curr_chan, OFFCHAN_TX_WAIT_TIME);
}
static int esp_dpp_handle_config_obj(struct dpp_authentication *auth,
struct dpp_config_obj *conf)
{
wifi_config_t *wifi_cfg = &s_dpp_ctx.wifi_cfg;
os_memset(wifi_cfg, 0, sizeof(wifi_config_t));
if (conf->ssid_len) {
os_memcpy(wifi_cfg->sta.ssid, conf->ssid, conf->ssid_len);
}
if (dpp_akm_legacy(conf->akm)) {
if (conf->passphrase[0])
os_memcpy(wifi_cfg->sta.password, conf->passphrase,
sizeof(wifi_cfg->sta.password));
if (conf->akm == DPP_AKM_PSK_SAE) {
wifi_cfg->sta.pmf_cfg.required = true;
}
}
if (conf->connector) {
/* TODO: Save the Connector and consider using a command
* to fetch the value instead of sending an event with
* it. The Connector could end up being larger than what
* most clients are ready to receive as an event
* message. */
wpa_printf(MSG_INFO, DPP_EVENT_CONNECTOR "%s",
conf->connector);
}
if (s_dpp_listen_in_progress) {
esp_supp_dpp_stop_listen();
}
esp_dpp_call_cb(ESP_SUPP_DPP_CFG_RECVD, wifi_cfg);
return 0;
}
static void esp_dpp_rx_auth_conf(struct action_rx_param *rx_param, uint8_t *dpp_data)
{
struct dpp_authentication *auth = s_dpp_ctx.dpp_auth;
struct ieee80211_public_action *public_action =
&rx_param->action_frm->u.public_action;
size_t len = rx_param->vendor_data_len - 2;
int rc;
wpa_printf(MSG_DEBUG, "DPP: Authentication Confirmation from " MACSTR,
MAC2STR(rx_param->sa));
if (!auth) {
wpa_printf(MSG_DEBUG, "DPP: No DPP Authentication in progress - drop");
rc = ESP_ERR_DPP_FAILURE;
goto fail;
}
if (os_memcmp(rx_param->sa, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected "
MACSTR ") - drop", MAC2STR(auth->peer_mac_addr));
rc = ESP_ERR_DPP_FAILURE;
goto fail;
}
eloop_cancel_timeout(esp_dpp_auth_conf_wait_timeout, NULL, NULL);
if (dpp_auth_conf_rx(auth, (const u8 *)&public_action->v,
dpp_data, len) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Authentication failed");
rc = ESP_ERR_DPP_FAILURE;
goto fail;
}
/* Send GAS Query Req */
gas_query_req_tx(auth);
return;
fail:
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)rc);
}
static esp_err_t esp_dpp_rx_peer_disc_resp(struct action_rx_param *rx_param)
{
struct dpp_authentication *auth = s_dpp_ctx.dpp_auth;
uint8_t *buf;
unsigned int seconds;
struct os_reltime rnow;
const uint8_t *connector, *trans_id, *status = NULL;
uint16_t connector_len, trans_id_len, status_len;
enum dpp_status_error res = 0;
struct dpp_introduction intro;
os_time_t expiry;
struct os_time now;
struct wpa_sm *sm = get_wpa_sm();
struct rsn_pmksa_cache_entry *entry = NULL;
int i = 0;
if (!rx_param || !rx_param->action_frm) {
return ESP_ERR_INVALID_ARG;
}
size_t len = rx_param->vendor_data_len - 2;
buf = rx_param->action_frm->u.public_action.v.pa_vendor_spec.vendor_data;
if (os_memcmp(auth->peer_mac_addr, rx_param->sa, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: Not expecting Peer Discovery response from " MACSTR, MAC2STR(rx_param->sa));
return ESP_OK;
}
wpa_printf(MSG_DEBUG, "DPP: Peer Discovery from " MACSTR, MAC2STR(rx_param->sa));
for (i = 0; i < auth->num_conf_obj; i++) {
if (!auth->conf_obj[i].connector
|| !auth->net_access_key
|| !auth->conf_obj[i].c_sign_key
|| dpp_akm_legacy(auth->conf_obj[i].akm)) {
wpa_printf(MSG_DEBUG, "DPP: Profile not found for network introduction or akm mismatch");
continue;
}
trans_id = dpp_get_attr(&buf[2], len, DPP_ATTR_TRANSACTION_ID, &trans_id_len);
if (!trans_id || trans_id_len != 1) {
wpa_printf(MSG_ERROR, "DPP: Peer did not include Transaction ID");
return ESP_FAIL;
}
if (trans_id[0] != TRANSACTION_ID) {
wpa_printf(MSG_ERROR, "DPP: Ignore frame with unexpected Transaction ID %u", trans_id[0]);
return ESP_FAIL;
}
status = dpp_get_attr(&buf[2], len, DPP_ATTR_STATUS, &status_len);
if (!status || status_len != 1) {
wpa_printf(MSG_ERROR, "DPP: Peer did not include Status");
return ESP_FAIL;
}
if (status[0] != DPP_STATUS_OK) {
wpa_printf(MSG_ERROR, "DPP: Peer rejected network introduction: Status %u", status[0]);
return ESP_FAIL;
}
connector = dpp_get_attr(&buf[2], len, DPP_ATTR_CONNECTOR, &connector_len);
if (!connector) {
wpa_printf(MSG_ERROR, "DPP: Peer did not include its Connector");
return ESP_FAIL;
}
res = dpp_peer_intro(&intro, auth->conf_obj[i].connector,
wpabuf_head(auth->net_access_key),
wpabuf_len(auth->net_access_key),
wpabuf_head(auth->conf_obj[i].c_sign_key),
wpabuf_len(auth->conf_obj[i].c_sign_key),
connector, connector_len, &expiry);
if (res == DPP_STATUS_OK) {
entry = os_zalloc(sizeof(*entry));
if (!entry) {
goto fail;
}
os_memcpy(entry->aa, rx_param->sa, ETH_ALEN);
os_memcpy(entry->pmkid, intro.pmkid, PMKID_LEN);
os_memcpy(entry->pmk, intro.pmk, intro.pmk_len);
entry->pmk_len = intro.pmk_len;
entry->akmp = WPA_KEY_MGMT_DPP;
if (expiry) {
os_get_time(&now);
seconds = expiry - now.sec;
} else {
seconds = ESP_DPP_PMK_CACHE_DEFAULT_TIMEOUT;
}
os_get_reltime(&rnow);
entry->expiration = rnow.sec + seconds;
entry->reauth_time = rnow.sec + seconds;
entry->network_ctx = auth;
pmksa_cache_add_entry(sm->pmksa, entry);
wpa_printf(MSG_INFO, "peer=" MACSTR " status=%u", MAC2STR(rx_param->sa), status[0]);
break;
}
}
if (res != DPP_STATUS_OK) {
wpa_printf(MSG_ERROR, "DPP: Network Introduction protocol resulted in failure");
goto fail;
}
wpa_printf(MSG_DEBUG,
"DPP: Try connection after successful network introduction");
dpp_connect(rx_param->sa, true);
return ESP_OK;
fail:
os_memset(&intro, 0, sizeof(intro));
if (entry != NULL) {
os_free(entry);
}
return ESP_FAIL;
}
static esp_err_t esp_dpp_rx_frm(struct action_rx_param *rx_param)
{
uint8_t crypto_suit, type;
uint8_t *tmp;
int ret = ESP_OK;
tmp = rx_param->action_frm->u.public_action.v.pa_vendor_spec.vendor_data;
crypto_suit = tmp[0];
type = tmp[1];
if (crypto_suit != 1) {
wpa_printf(MSG_ERROR, "DPP: Unsupported crypto suit");
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_NOT_SUPPORTED);
ret = ESP_FAIL;
} else {
switch (type) {
case DPP_PA_AUTHENTICATION_REQ:
esp_dpp_rx_auth_req(rx_param, &tmp[2]);
break;
case DPP_PA_AUTHENTICATION_CONF:
esp_dpp_rx_auth_conf(rx_param, &tmp[2]);
break;
case DPP_PA_PEER_DISCOVERY_RESP:
ret = esp_dpp_rx_peer_disc_resp(rx_param);
break;
}
}
return ret;
}
static void gas_query_resp_rx(struct action_rx_param *rx_param)
{
struct dpp_authentication *auth = s_dpp_ctx.dpp_auth;
uint8_t *pos = rx_param->action_frm->u.public_action.v.pa_gas_resp.data;
uint8_t *resp = &pos[10];
int i, res;
if (pos[1] == WLAN_EID_VENDOR_SPECIFIC && pos[2] == 5 &&
WPA_GET_BE24(&pos[3]) == OUI_WFA && pos[6] == 0x1a && pos[7] == 1 && auth) {
if (dpp_conf_resp_rx(auth, resp, rx_param->vendor_data_len - 2) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Configuration attempt failed");
goto fail;
}
for (i = 0; i < auth->num_conf_obj; i++) {
res = esp_dpp_handle_config_obj(auth, &auth->conf_obj[i]);
if (res < 0) {
goto fail;
}
}
}
return;
fail:
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_DPP_FAILURE);
}
static esp_err_t esp_dpp_rx_action(struct action_rx_param *rx_param)
{
int ret = ESP_OK;
if (!rx_param) {
return ESP_ERR_INVALID_ARG;
}
if (rx_param->action_frm->category == WLAN_ACTION_PUBLIC) {
struct ieee80211_public_action *public_action =
&rx_param->action_frm->u.public_action;
wpa_printf(MSG_DEBUG, "DPP: Rx Public Action frame: action - %d",
public_action->action);
if (public_action->action == WLAN_PA_VENDOR_SPECIFIC &&
WPA_GET_BE24(public_action->v.pa_vendor_spec.oui) == OUI_WFA &&
public_action->v.pa_vendor_spec.wfa_stype == DPP_OUI_TYPE) {
rx_param->vendor_data_len = rx_param->frm_len -
(size_t)(public_action->v.pa_vendor_spec.vendor_data -
(u8 *)rx_param->action_frm);
if (s_dpp_listen_in_progress) {
esp_supp_dpp_stop_listen();
}
ret = esp_dpp_rx_frm(rx_param);
} else if (public_action->action == WLAN_PA_GAS_INITIAL_RESP &&
public_action->v.pa_gas_resp.type == WLAN_EID_ADV_PROTO &&
public_action->v.pa_gas_resp.length == 8 &&
public_action->v.pa_gas_resp.status_code == 0) {
rx_param->vendor_data_len = rx_param->frm_len -
(size_t)(public_action->v.pa_gas_resp.data +
public_action->v.pa_gas_resp.length -
(u8 *)rx_param->action_frm);
gas_query_resp_rx(rx_param);
}
}
os_free(rx_param->action_frm);
os_free(rx_param);
return ret;
}
static void esp_dpp_task(void *pvParameters)
{
dpp_event_t evt;
bool task_del = false;
for (;;) {
if (os_queue_recv(s_dpp_evt_queue, &evt, OS_BLOCK) == TRUE) {
if (evt.id >= SIG_DPP_MAX) {
continue;
}
switch (evt.id) {
case SIG_DPP_DEL_TASK:
struct dpp_bootstrap_params_t *params = &s_dpp_ctx.bootstrap_params;
eloop_cancel_timeout(esp_dpp_auth_conf_wait_timeout, NULL, NULL);
if (params->info) {
os_free(params->info);
params->info = NULL;
}
if (s_dpp_ctx.dpp_global) {
dpp_global_deinit(s_dpp_ctx.dpp_global);
s_dpp_ctx.dpp_global = NULL;
}
if (s_dpp_ctx.dpp_auth) {
dpp_auth_deinit(s_dpp_ctx.dpp_auth);
s_dpp_ctx.dpp_auth = NULL;
}
task_del = true;
break;
case SIG_DPP_BOOTSTRAP_GEN: {
char *command = (char *)evt.data;
const char *uri;
s_dpp_ctx.id = dpp_bootstrap_gen(s_dpp_ctx.dpp_global, command);
uri = dpp_bootstrap_get_uri(s_dpp_ctx.dpp_global, s_dpp_ctx.id);
esp_dpp_call_cb(ESP_SUPP_DPP_URI_READY, (void *)uri);
os_free(command);
}
break;
case SIG_DPP_RX_ACTION: {
esp_dpp_rx_action((struct action_rx_param *)evt.data);
}
break;
case SIG_DPP_LISTEN_NEXT_CHANNEL: {
struct dpp_bootstrap_params_t *p = &s_dpp_ctx.bootstrap_params;
static int counter;
int channel;
esp_err_t ret = 0;
if (p->num_chan <= 0) {
wpa_printf(MSG_ERROR, "Listen channel not set");
break;
}
channel = p->chan_list[counter++ % p->num_chan];
wpa_printf(MSG_DEBUG, "Listening on channel=%d", channel);
ret = esp_wifi_remain_on_channel(WIFI_IF_STA, WIFI_ROC_REQ, channel,
BOOTSTRAP_ROC_WAIT_TIME, s_action_rx_cb);
if (ret != ESP_OK) {
wpa_printf(MSG_ERROR, "Failed ROC. error : 0x%x", ret);
break;
}
s_dpp_listen_in_progress = true;
}
break;
case SIG_DPP_START_NET_INTRO: {
esp_dpp_start_net_intro_protocol((uint8_t*)evt.data);
}
break;
case SIG_DPP_DEINIT_AUTH: {
if (s_dpp_ctx.dpp_auth) {
dpp_auth_deinit(s_dpp_ctx.dpp_auth);
s_dpp_ctx.dpp_auth = NULL;
}
wpa_printf(MSG_DEBUG, "DPP auth deinintialized");
}
break;
default:
break;
}
if (task_del) {
break;
}
}
}
os_queue_delete(s_dpp_evt_queue);
s_dpp_evt_queue = NULL;
if (s_dpp_api_lock) {
os_mutex_delete(s_dpp_api_lock);
s_dpp_api_lock = NULL;
}
/* At this point, we completed */
os_task_delete(NULL);
}
int esp_supp_rx_action(uint8_t *hdr, uint8_t *payload, size_t len, uint8_t channel)
{
struct ieee80211_hdr *rx_hdr = (struct ieee80211_hdr *)hdr;
struct action_rx_param *rx_param;
int ret = ESP_ERR_NOT_SUPPORTED;
if (WLAN_FC_GET_STYPE(rx_hdr->frame_control) == WLAN_FC_STYPE_ACTION) {
rx_param = os_zalloc(sizeof(struct action_rx_param));
if (!rx_param) {
wpa_printf(MSG_ERROR, "Failed to allocate memory for Rx Action");
return ESP_ERR_NO_MEM;
}
os_memcpy(rx_param->sa, rx_hdr->addr2, ETH_ALEN);
rx_param->channel = channel;
rx_param->action_frm = os_zalloc(len);
if (!rx_param->action_frm) {
wpa_printf(MSG_ERROR, "Failed to allocate memory for Rx Action");
os_free(rx_param);
return ESP_ERR_NO_MEM;
}
rx_param->frm_len = len;
os_memcpy(rx_param->action_frm, payload, len);
ret = esp_dpp_post_evt(SIG_DPP_RX_ACTION, (u32)rx_param);
if (ESP_OK != ret) {
wpa_printf(MSG_ERROR, "Failed to post event to DPP Task(status=%d)", ret);
os_free(rx_param->action_frm);
os_free(rx_param);
return ret;
}
}
return ret;
}
static void offchan_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
if (event_id == WIFI_EVENT_ACTION_TX_STATUS) {
wifi_event_action_tx_status_t *evt =
(wifi_event_action_tx_status_t *)event_data;
wpa_printf(MSG_DEBUG, "Mgmt Tx Status - %d, Cookie - 0x%x",
evt->status, (uint32_t)evt->context);
if (evt->status) {
eloop_cancel_timeout(esp_dpp_auth_conf_wait_timeout, NULL, NULL);
if (s_dpp_listen_in_progress) {
esp_supp_dpp_stop_listen();
}
esp_dpp_call_cb(ESP_SUPP_DPP_FAIL, (void *)ESP_ERR_DPP_TX_FAILURE);
}
} else if (event_id == WIFI_EVENT_ROC_DONE) {
wifi_event_roc_done_t *evt = (wifi_event_roc_done_t *)event_data;
if (s_dpp_listen_in_progress && evt->context == (uint32_t)s_action_rx_cb) {
esp_dpp_post_evt(SIG_DPP_LISTEN_NEXT_CHANNEL, 0);
}
}
}
static char *esp_dpp_parse_chan_list(const char *chan_list)
{
struct dpp_bootstrap_params_t *params = &s_dpp_ctx.bootstrap_params;
size_t max_uri_len = ESP_DPP_MAX_CHAN_COUNT * 8 + strlen(" chan=") + 1;
char *uri_channels = os_zalloc(max_uri_len);
if (!uri_channels) {
wpa_printf(MSG_WARNING, "DPP: URI allocation failed");
return NULL;
}
char *uri_ptr = uri_channels;
params->num_chan = 0;
/* Append " chan=" at the beginning of the URI */
strcpy(uri_ptr, " chan=");
uri_ptr += strlen(" chan=");
while (*chan_list && params->num_chan < ESP_DPP_MAX_CHAN_COUNT) {
int channel = 0;
/* Parse the channel number */
while (*chan_list >= '0' && *chan_list <= '9') {
channel = channel * 10 + (*chan_list - '0');
chan_list++;
}
/* Validate the channel number */
if (CHANNEL_TO_BIT_NUMBER(channel) == 0) {
wpa_printf(MSG_WARNING, "DPP: Skipping invalid channel %d", channel);
/* Skip to the next valid entry */
while (*chan_list == ',' || *chan_list == ' ') {
chan_list++;
}
continue; // Skip the bad channel and move to the next one
}
/* Get the operating class for the channel */
u8 oper_class = get_operating_class(channel, 0);
if (oper_class == 0) {
wpa_printf(MSG_WARNING, "DPP: Skipping channel %d due to missing operating class", channel);
/* Skip to the next valid entry */
while (*chan_list == ',' || *chan_list == ' ') {
chan_list++;
}
continue; /* Skip to the next channel if no operating class found */
}
/* Add the valid channel to the list */
params->chan_list[params->num_chan++] = channel;
/* Check if there's space left in uri_channels buffer */
size_t remaining_space = max_uri_len - (uri_ptr - uri_channels);
if (remaining_space <= 8) { // Oper class + "/" + channel + "," + null terminator
wpa_printf(MSG_ERROR, "DPP: Not enough space in URI buffer");
os_free(uri_channels);
return NULL;
}
/* Append the operating class and channel to the URI */
uri_ptr += sprintf(uri_ptr, "%d/%d,", oper_class, channel);
/* Skip any delimiters (comma or space) */
while (*chan_list == ',' || *chan_list == ' ') {
chan_list++;
}
}
if (!params->num_chan) {
wpa_printf(MSG_ERROR, "DPP: No valid channel in the list");
os_free(uri_channels);
return NULL;
}
/* Replace the last comma with a space if there was content added */
if (uri_ptr > uri_channels && *(uri_ptr - 1) == ',') {
*(uri_ptr - 1) = ' ';
}
return uri_channels;
}
esp_err_t
esp_supp_dpp_bootstrap_gen(const char *chan_list, enum dpp_bootstrap_type type,
const char *key, const char *uri_info)
{
if (!s_dpp_ctx.dpp_global) {
wpa_printf(MSG_ERROR, "DPP: failed to bootstrap as dpp not initialized.");
return ESP_FAIL;
}
struct dpp_bootstrap_params_t *params = &s_dpp_ctx.bootstrap_params;
char *uri_chan_list = esp_dpp_parse_chan_list(chan_list);
if (params->num_chan > ESP_DPP_MAX_CHAN_COUNT) {
os_free(uri_chan_list);
return ESP_ERR_DPP_INVALID_LIST;
}
char *command = os_zalloc(1200);
int ret;
if (!uri_chan_list || !command || params->num_chan > ESP_DPP_MAX_CHAN_COUNT || params->num_chan == 0) {
wpa_printf(MSG_ERROR, "Invalid Channel list - %s", chan_list);
if (command) {
os_free(command);
}
ret = ESP_ERR_DPP_FAILURE;
goto fail;
}
if (type != DPP_BOOTSTRAP_QR_CODE) {
wpa_printf(MSG_INFO, "Bootstrap type %d not supported", type);
os_free(command);
ret = ESP_ERR_NOT_SUPPORTED;
goto fail;
}
params->type = type;
esp_wifi_get_mac(WIFI_IF_STA, params->mac);
if (uri_info) {
params->info_len = strlen(uri_info);
if (params->info_len) {
params->info = os_zalloc(params->info_len + 1);
if (!params->info) {
os_free(command);
ret = ESP_ERR_NO_MEM;
goto fail;
}
os_memcpy(params->info, uri_info, params->info_len);
}
}
os_snprintf(command, 1200, "type=qrcode mac=" MACSTR "%s%s%s%s%s",
MAC2STR(params->mac), uri_chan_list,
key ? "key=" : "", key ? key : "",
params->info_len ? " info=" : "",
params->info_len ? params->info : "");
ret = esp_dpp_post_evt(SIG_DPP_BOOTSTRAP_GEN, (u32)command);
if (ret != ESP_OK) {
os_free(command);
if (params->info) {
os_free(params->info);
params->info = NULL;
}
goto fail;
}
ret = ESP_OK;
fail:
if (uri_chan_list) {
os_free(uri_chan_list);
}
return ret;
}
esp_err_t esp_supp_dpp_start_listen(void)
{
if (s_dpp_listen_in_progress) {
wpa_printf(MSG_ERROR, "DPP: Failed to start listen as listen is already in progress.");
return ESP_FAIL;
}
if (!s_dpp_ctx.dpp_global || s_dpp_ctx.id < 1) {
wpa_printf(MSG_ERROR, "DPP: failed to start listen as dpp not initialized or bootstrapped.");
return ESP_FAIL;
}
if (esp_wifi_get_user_init_flag_internal() == 0) {
wpa_printf(MSG_ERROR, "DPP: ROC not possible before wifi is started");
return ESP_ERR_INVALID_STATE;
}
return esp_dpp_post_evt(SIG_DPP_LISTEN_NEXT_CHANNEL, 0);
}
esp_err_t esp_supp_dpp_stop_listen(void)
{
s_dpp_listen_in_progress = false;
return esp_wifi_remain_on_channel(WIFI_IF_STA, WIFI_ROC_CANCEL, 0, 0, NULL);
}
bool is_dpp_enabled(void)
{
return (s_dpp_ctx.dpp_global ? true : false);
}
esp_err_t esp_supp_dpp_init(esp_supp_dpp_event_cb_t cb)
{
esp_err_t ret = ESP_OK;
wifi_mode_t mode = 0;
if (esp_wifi_get_mode(&mode) || ((mode != WIFI_MODE_STA) && (mode != WIFI_MODE_APSTA))) {
wpa_printf(MSG_ERROR, "DPP: failed to init as not in station mode.");
return ESP_FAIL;
}
if (is_wps_enabled()) {
wpa_printf(MSG_ERROR, "DPP: failed to init since WPS is enabled");
return ESP_FAIL;
}
if (s_dpp_ctx.dpp_global) {
wpa_printf(MSG_ERROR, "DPP: failed to init as init already done. Please deinit first and retry.");
return ESP_FAIL;
}
os_bzero(&s_dpp_ctx, sizeof(s_dpp_ctx));
struct dpp_global_config cfg = {0};
cfg.cb_ctx = &s_dpp_ctx;
cfg.msg_ctx = &s_dpp_ctx;
s_dpp_ctx.dpp_global = dpp_global_init(&cfg);
if (!s_dpp_ctx.dpp_global) {
wpa_printf(MSG_ERROR, "DPP: failed to allocate memory for dpp_global");
ret = ESP_ERR_NO_MEM;
goto init_fail;
}
s_dpp_api_lock = os_recursive_mutex_create();
if (!s_dpp_api_lock) {
wpa_printf(MSG_ERROR, "DPP: dpp_init: failed to create DPP API lock");
ret = ESP_ERR_NO_MEM;
goto init_fail;
}
s_dpp_evt_queue = os_queue_create(3, sizeof(dpp_event_t));
if (!s_dpp_evt_queue) {
wpa_printf(MSG_ERROR, "DPP: dpp_init: failed to create DPP API queue");
ret = ESP_ERR_NO_MEM;
goto init_fail;
}
ret = os_task_create(esp_dpp_task, "dppT", DPP_TASK_STACK_SIZE, NULL, 2, &s_dpp_task_hdl);
if (ret != TRUE) {
wpa_printf(MSG_ERROR, "DPP: failed to create task");
ret = ESP_ERR_NO_MEM;
goto init_fail;
}
s_dpp_listen_in_progress = false;
s_dpp_ctx.dpp_event_cb = cb;
esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_ACTION_TX_STATUS,
&offchan_event_handler, NULL);
esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_ROC_DONE,
&offchan_event_handler, NULL);
wpa_printf(MSG_INFO, "esp_dpp_task prio:%d, stack:%d", 2, DPP_TASK_STACK_SIZE);
return ESP_OK;
init_fail:
if (s_dpp_ctx.dpp_global) {
dpp_global_deinit(s_dpp_ctx.dpp_global);
s_dpp_ctx.dpp_global = NULL;
}
if (s_dpp_api_lock) {
os_mutex_delete(s_dpp_api_lock);
s_dpp_api_lock = NULL;
}
if (s_dpp_evt_queue) {
os_queue_delete(s_dpp_evt_queue);
s_dpp_evt_queue = NULL;
}
return ret;
}
esp_err_t esp_dpp_start_net_intro_protocol(uint8_t *bssid)
{
struct dpp_authentication *auth = s_dpp_ctx.dpp_auth;
struct wpabuf *buf;
for (int i = 0; i < auth->num_conf_obj; i++) {
os_memcpy(auth->peer_mac_addr, bssid, ETH_ALEN);
buf = dpp_build_peer_disc_req(auth, &auth->conf_obj[i]);
if (buf) {
if (esp_dpp_send_action_frame(bssid, wpabuf_head(buf), wpabuf_len(buf), auth->curr_chan, OFFCHAN_TX_WAIT_TIME) != ESP_OK) {
wpabuf_free(buf);
return ESP_FAIL;
}
} else {
return ESP_ERR_NO_MEM;
}
}
return ESP_OK;
}
esp_err_t esp_supp_dpp_deinit(void)
{
esp_event_handler_unregister(WIFI_EVENT, WIFI_EVENT_ACTION_TX_STATUS,
&offchan_event_handler);
esp_event_handler_unregister(WIFI_EVENT, WIFI_EVENT_ROC_DONE,
&offchan_event_handler);
if (s_dpp_ctx.dpp_global) {
if (esp_dpp_post_evt(SIG_DPP_DEL_TASK, 0)) {
wpa_printf(MSG_ERROR, "DPP Deinit Failed");
}
}
return ESP_OK;
}
#endif
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