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--- send_packet_bsd.c.orig 2009-05-23 11:11:58 UTC
+++ send_packet_bsd.c
@@ -56,7 +56,13 @@ int send_packet_bsd(const char *dev, u_c
flock(bpffd,LOCK_EX);
// Bind it to a device
- ioctl(bpffd,BIOCSETIF,dev);
+ if (ioctl(bpffd,BIOCSETIF,dev) == -1)
+ {
+ flock(bpffd,LOCK_UN);
+ close(bpffd);
+ perror("open bpf");
+ return 0;
+ }
// Send the packet and unlock
write(bpffd,packet,packetsize);
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