mirror of
https://github.com/espressif/esp-protocols.git
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106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <memory>
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#include <utility>
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#include <esp_log.h>
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#include <esp_event.h>
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#include "cxx_include/esp_modem_netif.hpp"
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#include "cxx_include/esp_modem_dte.hpp"
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#include "esp_netif_ppp.h"
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namespace esp_modem {
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void Netif::on_ppp_changed(void *arg, esp_event_base_t event_base,
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int32_t event_id, void *event_data) {
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auto *ppp = static_cast<Netif *>(arg);
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ESP_LOGW("TAG", "PPP state changed event %d", event_id);
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if (event_id < NETIF_PP_PHASE_OFFSET) {
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ESP_LOGI("TAG", "PPP state changed event %d", event_id);
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// only notify the modem on state/error events, ignoring phase transitions
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ppp->signal.set(PPP_EXIT);
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}
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}
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esp_err_t Netif::esp_modem_dte_transmit(void *h, void *buffer, size_t len) {
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auto *ppp = static_cast<Netif *>(h);
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if (ppp->signal.is_any(PPP_STARTED)) {
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if (ppp->ppp_dte->write((uint8_t *) buffer, len) > 0) {
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return ESP_OK;
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}
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}
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return ESP_FAIL;
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}
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esp_err_t Netif::esp_modem_post_attach(esp_netif_t *esp_netif, void *args) {
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auto d = (ppp_netif_driver *) args;
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esp_netif_driver_ifconfig_t driver_ifconfig = {};
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driver_ifconfig.transmit = Netif::esp_modem_dte_transmit;
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driver_ifconfig.handle = (void *) d->ppp;
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d->base.netif = esp_netif;
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ESP_ERROR_CHECK(esp_netif_set_driver_config(esp_netif, &driver_ifconfig));
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// check if PPP error events are enabled, if not, do enable the error occurred/state changed
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// to notify the modem layer when switching modes
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esp_netif_ppp_config_t ppp_config;
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// esp_netif_ppp_get_params(esp_netif, &ppp_config);
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if (!ppp_config.ppp_error_event_enabled) {
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ppp_config.ppp_error_event_enabled = true;
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esp_netif_ppp_set_params(esp_netif, &ppp_config);
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}
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return ESP_OK;
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}
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void Netif::receive(uint8_t *data, size_t len) {
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if (signal.is_any(PPP_STARTED)) {
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esp_netif_receive(driver.base.netif, data, len, nullptr);
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}
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}
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Netif::Netif(std::shared_ptr<DTE> e, esp_netif_t *ppp_netif) :
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ppp_dte(std::move(e)), netif(ppp_netif) {
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driver.base.netif = ppp_netif;
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driver.ppp = this;
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driver.base.post_attach = esp_modem_post_attach;
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throw_if_esp_fail(esp_event_handler_register(NETIF_PPP_STATUS, ESP_EVENT_ANY_ID, &on_ppp_changed, (void *) this));
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throw_if_esp_fail(esp_event_handler_register(IP_EVENT, IP_EVENT_PPP_GOT_IP, esp_netif_action_connected, ppp_netif));
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throw_if_esp_fail(
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esp_event_handler_register(IP_EVENT, IP_EVENT_PPP_LOST_IP, esp_netif_action_disconnected, ppp_netif));
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throw_if_esp_fail(esp_netif_attach(ppp_netif, &driver));
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}
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void Netif::start() {
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ppp_dte->set_data_cb([this](size_t len) -> bool {
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uint8_t *data;
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auto actual_len = ppp_dte->read(&data, len);
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receive(data, actual_len);
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return false;
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});
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esp_netif_action_start(driver.base.netif, 0, 0, 0);
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signal.set(PPP_STARTED);
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}
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void Netif::stop() {
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esp_netif_action_stop(driver.base.netif, nullptr, 0, nullptr);
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signal.clear(PPP_STARTED);
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}
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Netif::~Netif() {
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esp_event_handler_unregister(NETIF_PPP_STATUS, ESP_EVENT_ANY_ID, &on_ppp_changed);
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esp_event_handler_unregister(IP_EVENT, IP_EVENT_PPP_GOT_IP, esp_netif_action_connected);
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esp_event_handler_unregister(IP_EVENT, IP_EVENT_PPP_LOST_IP, esp_netif_action_disconnected);
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}
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} // namespace esp_modem
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