- major change, use lwip netconn instead of socket API to reduce RAM footprint

o flac works, opus and pcm are untested and not working
- improve on resyncing issues
- add wifi logger component submodule
- optimize stack sizes

components/protocol_examples_common/include/addr_from_stdin.h

@@ -0,0 +1,45 @@
+/*  Common utilities for socket address input interface:
+    The API get_addr_from_stdin() is mainly used by socket client examples
+   which read IP address from stdin (if configured). This option is typically
+   used in the CI, but could be enabled in the project configuration. In that
+   case this component is used to receive a string that is evaluated and
+   processed to output socket structures to open a connectio This example code
+   is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "lwip/sys.h"
+#include <arpa/inet.h>
+#include <lwip/netdb.h>
+
+  /**
+   * @brief Read and evaluate IP address from stdin
+   *
+   * This API reads stdin and parses the input address using getaddrinfo()
+   * to fill in struct sockaddr_in6 (for both IPv4 and IPv6) used to open
+   * a socket. IP protocol is guessed from the IP address string.
+   *
+   * @param[in] port port number of expected connection
+   * @param[in] sock_type expected protocol: SOCK_STREAM or SOCK_DGRAM
+   * @param[out] ip_protocol resultant IP protocol: IPPROTO_IP or IPPROTO_IP6
+   * @param[out] addr_family resultant address family: AF_INET or AF_INET6
+   * @param[out] dest_addr sockaddr_in6 structure (for both IPv4 and IPv6)
+   * @return ESP_OK on success, ESP_FAIL otherwise
+   */
+  esp_err_t get_addr_from_stdin (int port, int sock_type, int *ip_protocol,
+                                 int *addr_family,
+                                 struct sockaddr_in6 *dest_addr);
+
+#ifdef __cplusplus
+}
+#endif

components/protocol_examples_common/include/protocol_examples_common.h

@@ -0,0 +1,80 @@
+/* Common functions for protocol examples, to establish Wi-Fi or Ethernet
+   connection.
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+ */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "esp_err.h"
+#include "esp_netif.h"
+
+#ifdef CONFIG_EXAMPLE_CONNECT_ETHERNET
+#define EXAMPLE_INTERFACE get_example_netif ()
+#endif
+
+#ifdef CONFIG_EXAMPLE_CONNECT_WIFI
+#define EXAMPLE_INTERFACE get_example_netif ()
+#endif
+
+  /**
+   * @brief Configure Wi-Fi or Ethernet, connect, wait for IP
+   *
+   * This all-in-one helper function is used in protocols examples to
+   * reduce the amount of boilerplate in the example.
+   *
+   * It is not intended to be used in real world applications.
+   * See examples under examples/wifi/getting_started/ and examples/ethernet/
+   * for more complete Wi-Fi or Ethernet initialization code.
+   *
+   * Read "Establishing Wi-Fi or Ethernet Connection" section in
+   * examples/protocols/README.md for more information about this function.
+   *
+   * @return ESP_OK on successful connection
+   */
+  esp_err_t example_connect (void);
+
+  /**
+   * Counterpart to example_connect, de-initializes Wi-Fi or Ethernet
+   */
+  esp_err_t example_disconnect (void);
+
+  /**
+   * @brief Configure stdin and stdout to use blocking I/O
+   *
+   * This helper function is used in ASIO examples. It wraps installing the
+   * UART driver and configuring VFS layer to use UART driver for console I/O.
+   */
+  esp_err_t example_configure_stdin_stdout (void);
+
+  /**
+   * @brief Returns esp-netif pointer created by example_connect()
+   *
+   * @note If multiple interfaces active at once, this API return NULL
+   * In that case the get_example_netif_from_desc() should be used
+   * to get esp-netif pointer based on interface description
+   */
+  esp_netif_t *get_example_netif (void);
+
+  /**
+   * @brief Returns esp-netif pointer created by example_connect() described by
+   * the supplied desc field
+   *
+   * @param desc Textual interface of created network interface, for example
+   * "sta" indicate default WiFi station, "eth" default Ethernet interface.
+   *
+   */
+  esp_netif_t *get_example_netif_from_desc (const char *desc);
+
+#ifdef __cplusplus
+}
+#endif