nonblocking: Add tests for sockets.

[gnulib.git] / tests / socket-server.h

diff --git a/tests/socket-server.h b/tests/socket-server.h
new file mode 100644 (file)
index 0000000..283ef2f
--- /dev/null
+++ b/tests/socket-server.h
@@ -0,0 +1,117 @@
+/* Create sockets for use in tests (server side).
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/* Creates a server that can be used to listen on incoming
+   connections.  It uses the IPv4 protocol.
+   If PORT is 0, a port is assigned by the kernel.
+   Returns the server.  Returns the chosen port in *PPORT.  */
+static int
+create_server (int port, unsigned int max_backlog, int *pport)
+{
+  int server;
+
+  /* Create a server socket.  */
+  server = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
+  if (server < 0)
+    {
+      fputs ("Skipping test: cannot create server socket: socket() failed\n",
+             stderr);
+      exit (77);
+    }
+  /* Bind it to a local IPv4 address.  */
+  if (port != 0)
+    {
+      /* Set an option for the next bind() call: Avoid an EADDRINUSE error
+         in case there are TIME_WAIT or CLOSE_WAIT sockets hanging around on
+         the port. (Sockets in LISTEN or ESTABLISHED state on the same port
+         will still yield an error.)  */
+      unsigned int flag = 1;
+      if (setsockopt (server, SOL_SOCKET, SO_REUSEADDR, &flag,
+                      sizeof (flag))
+          < 0)
+        {
+          fputs ("Skipping test: cannot create server socket: setsockopt() failed\n",
+                 stderr);
+          exit (77);
+        }
+    }
+  {
+    struct sockaddr_in addr;
+
+    memset (&addr, 0, sizeof (addr)); /* needed on AIX and OSF/1 */
+    addr.sin_family = AF_INET;
+    #if 0 /* Unoptimized */
+    inet_pton (AF_INET, "127.0.0.1", &addr.sin_addr);
+    #elif 0 /* Nearly optimized */
+    addr.sin_addr.s_addr = htonl (0x7F000001); /* 127.0.0.1 */
+    #else /* Fully optimized */
+    {
+      unsigned char dotted[4] = { 127, 0, 0, 1 }; /* 127.0.0.1 */
+      memcpy (&addr.sin_addr.s_addr, dotted, 4);
+    }
+    #endif
+    addr.sin_port = htons (port);
+
+    if (bind (server, (const struct sockaddr *) &addr, sizeof (addr)) < 0)
+      {
+        fputs ("Skipping test: cannot create server socket: bind() failed\n",
+               stderr);
+        exit (77);
+      }
+  }
+  if (port == 0)
+    {
+      /* Get the port that was assigned by bind().  */
+      struct sockaddr_in addr;
+      socklen_t addrlen = sizeof (addr);
+
+      if (getsockname (server, (struct sockaddr *) &addr, &addrlen) < 0)
+        {
+          fputs ("Skipping test: cannot create server socket: getsockname() failed\n",
+                 stderr);
+          exit (77);
+        }
+      port = ntohs (addr.sin_port);
+    }
+  /* Start listening for a connection from the child process.  */
+  if (listen (server, max_backlog) < 0)
+    {
+      fputs ("Skipping test: cannot create server socket: listen() failed\n",
+             stderr);
+      exit (77);
+    }
+
+  *pport = port;
+  return server;
+}
+
+/* Creates a server socket, by accepting a connection to a server.  */
+static int
+create_server_socket (int server)
+{
+  struct sockaddr_storage addr;
+  socklen_t addrlen = sizeof (addr);
+  int connected_socket = accept (server, (struct sockaddr *) &addr, &addrlen);
+  ASSERT (connected_socket >= 0);
+  return connected_socket;
+}