Add IPv6 support for ESP-IDF framework (#2953)

Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>

esphome/components/socket/socket.cpp

@@ -0,0 +1,43 @@
+#include "socket.h"
+#include "esphome/core/log.h"
+#include <cstring>
+#include <cerrno>
+
+namespace esphome {
+namespace socket {
+
+std::unique_ptr<Socket> socket_ip(int type, int protocol) {
+#if LWIP_IPV6
+  return socket(AF_INET6, type, protocol);
+#else
+  return socket(AF_INET, type, protocol);
+#endif
+}
+
+socklen_t set_sockaddr_any(struct sockaddr *addr, socklen_t addrlen, uint16_t port) {
+#if LWIP_IPV6
+  if (addrlen < sizeof(sockaddr_in6)) {
+    errno = EINVAL;
+    return 0;
+  }
+  auto *server = reinterpret_cast<sockaddr_in6 *>(addr);
+  memset(server, 0, sizeof(sockaddr_in6));
+  server->sin6_family = AF_INET6;
+  server->sin6_port = port;
+  server->sin6_addr = in6addr_any;
+  return sizeof(sockaddr_in6);
+#else
+  if (addrlen < sizeof(sockaddr_in)) {
+    errno = EINVAL;
+    return 0;
+  }
+  auto *server = reinterpret_cast<sockaddr_in *>(addr);
+  memset(server, 0, sizeof(sockaddr_in));
+  server->sin_family = AF_INET;
+  server->sin_addr.s_addr = ESPHOME_INADDR_ANY;
+  server->sin_port = port;
+  return sizeof(sockaddr_in);
+#endif
+}
+}  // namespace socket
+}  // namespace esphome