feat(wifi_remote): Initial stubs for wifi-remote

esp_wifi_remote/wifi_remote_init.c

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "esp_err.h"
+#include <rpc_wrapper.h>
+#include "esp_wifi_remote.h"
+
+esp_err_t remote_esp_wifi_init_slave(void)
+{
+    if (esp_hosted_setup() != ESP_OK) {
+        return ESP_FAIL;
+    }
+    esp_hosted_channel_fn_t tx_cb;
+    esp_hosted_channel_t * ch;
+
+    // Add an RPC channel with default config (i.e. secure=true)
+    esp_hosted_channel_config_t config = ESP_HOSTED_CHANNEL_CONFIG_DEFAULT();
+    ch = esp_hosted_add_channel(&config, &tx_cb, esp_wifi_remote_rpc_channel_rx);
+    esp_wifi_remote_rpc_channel_set(ch, tx_cb);
+
+    // Add two other channels for the two WiFi interfaces (STA, softAP) in plain text
+    config.secure = false;
+    ch = esp_hosted_add_channel(&config, &tx_cb, esp_wifi_remote_channel_rx); // TODO: add checks for `ch` and `tx_cb`
+    esp_wifi_remote_channel_set(WIFI_IF_STA, ch, tx_cb);
+    ch = esp_hosted_add_channel(&config, &tx_cb, esp_wifi_remote_channel_rx);
+    esp_wifi_remote_channel_set(WIFI_IF_AP, ch, tx_cb);
+
+    return ESP_OK;
+}