UDP_Init now tries to bind to INADDR_ANY and various others in sequence

[xonotic/darkplaces.git] / net_udp.c

diff --git a/net_udp.c b/net_udp.c
index c417b0e1045f71c12cf9703078cf5a54a51a66f2..46f638c5477bf8d62b4ea4fc1a651160e8bc3192 100644 (file)
--- a/net_udp.c
+++ b/net_udp.c
@@ -57,8 +57,8 @@ WSADATA               winsockdata;
 
 int UDP_Init (void)
 {
-       int i;
-       struct hostent *local = NULL;
+       int i, j;
+       struct hostent *local;
        char buff[MAXHOSTNAMELEN];
 
        if (COM_CheckParm ("-noudp"))
@@ -73,30 +73,55 @@ int UDP_Init (void)
 #endif
 
        // loopback as a worst case fallback
-       myAddr.d[0] = 127;myAddr.d[1] = 0;myAddr.d[2] = 0;myAddr.d[3] = 1;
+       myAddr.i = htonl(INADDR_ANY);
 
-       if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc)
+       net_controlsocket = -1;
+       for (j = 0;net_controlsocket == -1;j++)
        {
-               myAddr.i = inet_addr(com_argv[i+1]);
-               Con_Printf("Binding to IP Interface Address of %i.%i.%i.%i\n", myAddr.d[0], myAddr.d[1], myAddr.d[2], myAddr.d[3]);
-       }
-       else if (gethostname(buff, MAXHOSTNAMELEN) != -1)
-       {
-               buff[MAXHOSTNAMELEN - 1] = 0;
-               local = gethostbyname(buff);
-               if (local != NULL)
-                       myAddr.i = *((int *)local->h_addr_list[0]);
-       }
-
-       sprintf(my_tcpip_address, "%d.%d.%d.%d", myAddr.d[0], myAddr.d[1], myAddr.d[2], myAddr.d[3]);
-
-       if ((net_controlsocket = UDP_OpenSocket (0)) == -1)
-       {
-               Con_Printf("UDP_Init: Unable to open control socket\n");
+               myAddr.d[0] = 127;
+               myAddr.d[1] = 0;
+               myAddr.d[2] = 0;
+               myAddr.d[3] = 1;
+               switch(j)
+               {
+               case 0:
+                       if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc)
+                               myAddr.i = inet_addr(com_argv[i+1]);
+                       break;
+               case 1:
+                       myAddr.i = htonl(INADDR_ANY);
+                       break;
+               case 2:
+                       if (gethostname(buff, MAXHOSTNAMELEN) != -1)
+                       {
+                               buff[MAXHOSTNAMELEN - 1] = 0;
+                               local = gethostbyname(buff);
+                               if (local != NULL)
+                                       myAddr.i = *((int *)local->h_addr_list[0]);
+                       }
+                       break;
+               default:
+                       Con_Printf("UDP_Init: Giving up, UDP networking support disabled.\n");
 #ifdef WIN32
-               WSACleanup ();
+                       WSACleanup ();
 #endif
-               return -1;
+                       return -1;
+               }
+
+               if (myAddr.i != htonl(INADDR_LOOPBACK))
+               {
+                       if (myAddr.i == htonl(INADDR_LOOPBACK))
+                               sprintf(my_tcpip_address, "INADDR_LOOPBACK");
+                       else if (myAddr.i == htonl(INADDR_ANY))
+                               sprintf(my_tcpip_address, "INADDR_ANY");
+                       else
+                               sprintf(my_tcpip_address, "%d.%d.%d.%d", myAddr.d[0], myAddr.d[1], myAddr.d[2], myAddr.d[3]);
+                       Con_Printf("UDP_Init: Binding to IP Interface Address of %s...  ", my_tcpip_address);
+                       if ((net_controlsocket = UDP_OpenSocket (0)) == -1)
+                               Con_Printf("failed\n");
+                       else
+                               Con_Printf("succeeded\n");
+               }
        }
 
        ((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET;