esp_modem: Moved to component folder

components/esp_modem/src/esp_modem_netif_linux.cpp

@@ -0,0 +1,63 @@
+// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <thread>
+#include "cxx_include/esp_modem_netif.hpp"
+#include "cxx_include/esp_modem_dte.hpp"
+
+namespace esp_modem {
+
+void Netif::on_ppp_changed(void *arg, esp_event_base_t event_base,
+                           int32_t event_id, void *event_data) {
+}
+
+esp_err_t Netif::esp_modem_dte_transmit(void *h, void *buffer, size_t len)
+{
+    auto *this_netif = static_cast<Netif *>(h);
+    this_netif->ppp_dte->write((uint8_t *) buffer, len);
+    return len;
+}
+
+esp_err_t Netif::esp_modem_post_attach(esp_netif_t *esp_netif, void *args) {
+    return ESP_OK;
+}
+
+void Netif::receive(uint8_t *data, size_t len)
+{
+    esp_netif_receive(netif, data, len);
+}
+
+Netif::Netif(std::shared_ptr<DTE> e, esp_netif_t *ppp_netif) :
+        ppp_dte(std::move(e)), netif(ppp_netif) {}
+
+void Netif::start()
+{
+    ppp_dte->set_read_cb([this](uint8_t *data, size_t len) -> bool {
+        receive(data, len);
+        return false;
+    });
+    netif->transmit = esp_modem_dte_transmit;
+    netif->ctx = (void*)this;
+    signal.set(PPP_STARTED);
+}
+
+void Netif::stop() {}
+
+Netif::~Netif() = default;
+
+void Netif::wait_until_ppp_exits() {
+
+}
+
+} // namespace esp_modem