test: add udp4_echo_server helper

test/echo-server.c

@@ -34,6 +34,7 @@ static uv_loop_t* loop;
 static int server_closed;
 static stream_type serverType;
 static uv_tcp_t tcpServer;
+static uv_udp_t udpServer;
 static uv_pipe_t pipeServer;
 static uv_handle_t* server;
 
@@ -176,6 +177,34 @@ static void on_server_close(uv_handle_t* handle) {
 }
 
 
+static void on_send(uv_udp_send_t* req, int status);
+
+
+static void on_recv(uv_udp_t* handle,
+                    ssize_t nread,
+                    uv_buf_t buf,
+                    struct sockaddr* addr,
+                    unsigned flags) {
+  uv_udp_send_t* req;
+  int r;
+
+  ASSERT(nread > 0);
+  ASSERT(addr->sa_family == AF_INET);
+
+  req = malloc(sizeof(*req));
+  ASSERT(req != NULL);
+
+  r = uv_udp_send(req, handle, &buf, 1, *(struct sockaddr_in*)addr, on_send);
+  ASSERT(r == 0);
+}
+
+
+static void on_send(uv_udp_send_t* req, int status) {
+  ASSERT(status == 0);
+  free(req);
+}
+
+
 static int tcp4_echo_start(int port) {
   struct sockaddr_in addr = uv_ip4_addr("0.0.0.0", port);
   int r;
@@ -242,6 +271,30 @@ static int tcp6_echo_start(int port) {
 }
 
 
+static int udp4_echo_start(int port) {
+  int r;
+
+  server = (uv_handle_t*)&udpServer;
+  serverType = UDP;
+
+  r = uv_udp_init(loop, &udpServer);
+  if (r) {
+    fprintf(stderr, "uv_udp_init: %s\n",
+        uv_strerror(uv_last_error(loop)));
+    return 1;
+  }
+
+  r = uv_udp_recv_start(&udpServer, echo_alloc, on_recv);
+  if (r) {
+    fprintf(stderr, "uv_udp_recv_start: %s\n",
+        uv_strerror(uv_last_error(loop)));
+    return 1;
+  }
+
+  return 0;
+}
+
+
 static int pipe_echo_start(char* pipeName) {
   int r;
 
@@ -304,3 +357,14 @@ HELPER_IMPL(pipe_echo_server) {
   uv_run(loop);
   return 0;
 }
+
+
+HELPER_IMPL(udp4_echo_server) {
+  loop = uv_default_loop();
+
+  if (udp4_echo_start(TEST_PORT))
+    return 1;
+
+  uv_run(loop);
+  return 0;
+}

test/task.h

@@ -42,6 +42,7 @@
 
 typedef enum {
   TCP = 0,
+  UDP,
   PIPE
 } stream_type;
 

test/test-list.h

@@ -128,6 +128,7 @@ TEST_DECLARE   (listen_no_simultaneous_accepts)
 #endif
 HELPER_DECLARE (tcp4_echo_server)
 HELPER_DECLARE (tcp6_echo_server)
+HELPER_DECLARE (udp4_echo_server)
 HELPER_DECLARE (pipe_echo_server)