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attempt to get the external ip address from the system rather than relying

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on hostname as hostname might resolve to 127.0.0.1, which isn't good for
trying to play networked games. if the attempt fails, fall back to the
hostname method
This commit is contained in:
Bill Currie 2005-04-27 03:34:38 +00:00
parent 3ff740d4f5
commit c4feb0e0d6
1 changed files with 38 additions and 0 deletions
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38
libs/net/nm/net_udp.c
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@ -77,6 +77,8 @@ static __attribute__ ((unused)) const char rcsid[] =
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include "QF/console.h"
#include "QF/cvar.h"
@ -117,6 +119,40 @@ static unsigned long myAddr;
#include "net_udp.h"
static int
get_address (int sock)
{
struct ifconf ifc;
struct ifreq *ifr;
char buf[8192];
int i, n;
struct sockaddr_in *in_addr;
unsigned long addr;
ifc.ifc_len = sizeof (buf);
ifc.ifc_buf = buf;
if (ioctl (sock, SIOCGIFCONF, &ifc) == -1)
return 0;
ifr = ifc.ifc_req;
n = ifc.ifc_len / sizeof (struct ifreq);
for (i = 0; i < n; i++) {
if (ioctl (sock, SIOCGIFADDR, &ifr[i]) == -1)
continue;
in_addr = (struct sockaddr_in *)&ifr[i].ifr_addr;
Con_DPrintf ("%s: %s\n", ifr[i].ifr_name,
inet_ntoa (in_addr->sin_addr));
addr = *(unsigned long *)&in_addr->sin_addr;
if (addr != htonl (0x7f000001)) {
myAddr = addr;
break;
}
}
return 1;
}
int
UDP_Init (void)
@ -153,6 +189,8 @@ UDP_Init (void)
if ((net_controlsocket = UDP_OpenSocket (0)) == -1)
Sys_Error ("UDP_Init: Unable to open control socket");
get_address (net_controlsocket);
((struct sockaddr_in *) &broadcastaddr)->sin_family = AF_INET;
((struct sockaddr_in *) &broadcastaddr)->sin_addr.s_addr =
INADDR_BROADCAST;