sysdeps-unix: enable address reuse on TCP sockets

This helps to avoid 'Address already in use' problems if server has been shut
down, and then restarted while sockets are still active on its port.

Signed-off-by: Steffen Sledz <sledz@dresearch.de>

1 files changed, 19 insertions, 1 deletions

diff --git a/dbus/dbus-sysdeps-unix.c b/dbus/dbus-sysdeps-unix.c
index ce3475a6..b58d09ab 100644
--- a/dbus/dbus-sysdeps-unix.c
+++ b/dbus/dbus-sysdeps-unix.c
@@ -623,6 +623,7 @@ _dbus_listen_unix_socket (const char     *path,
   int listen_fd;
   struct sockaddr_un addr;
   size_t path_len;
+  unsigned int reuseaddr;
 
   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
 
@@ -696,7 +697,15 @@ _dbus_listen_unix_socket (const char     *path,
 	
       strncpy (addr.sun_path, path, path_len);
     }
-  
+
+  reuseaddr = 1;
+  if (setsockopt  (listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr))==-1)
+    {
+      dbus_set_error (error, _dbus_error_from_errno (errno),
+                      "Failed to set socket option\"%s\": %s",
+                      path, _dbus_strerror (errno));
+    }
+
   if (bind (listen_fd, (struct sockaddr*) &addr, _DBUS_STRUCT_OFFSET (struct sockaddr_un, sun_path) + path_len) < 0)
     {
       dbus_set_error (error, _dbus_error_from_errno (errno),
@@ -870,6 +879,7 @@ _dbus_listen_tcp_socket (const char     *host,
   int nlisten_fd = 0, *listen_fd = NULL, res, i;
   struct addrinfo hints;
   struct addrinfo *ai, *tmp;
+  unsigned int reuseaddr;
 
   *fds_p = NULL;
   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
@@ -915,6 +925,14 @@ _dbus_listen_tcp_socket (const char     *host,
         }
       _DBUS_ASSERT_ERROR_IS_CLEAR(error);
 
+      reuseaddr = 1;
+      if (setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr))==-1)
+        {
+          dbus_set_error (error, _dbus_error_from_errno (errno),
+                          "Failed to set socket option \"%s:%s\": %s",
+                          host ? host : "*", port, _dbus_strerror (errno));
+        }
+
       if (bind (fd, (struct sockaddr*) tmp->ai_addr, tmp->ai_addrlen) < 0)
         {
           _dbus_close(fd, NULL);