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--- pptp_gre.c.orig Tue Jun 22 15:10:30 2004
+++ pptp_gre.c Tue Jun 22 15:10:38 2004
@@ -200,7 +200,7 @@
int optval, optlen = sizeof(optval);
warn("transmitted GRE packet triggered an ICMP destination unreachable, fragmentation needed, or exceeds the MTU of the network interface");
#define IP_MTU 14
- if(getsockopt(fd, SOL_IP, IP_MTU, &optval, &optlen) < 0)
+ if(getsockopt(fd, IPPROTO_IP, IP_MTU, &optval, &optlen) < 0)
warn("getsockopt: %s", strerror(errno));
warn("getsockopt: IP_MTU: %d\n", optval);
return 0;
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