On Monday 2010-04-19 21:36, Jeff Saremi wrote:
>
>Setup:
>
>iptables -A INPUT -p tcp -i eth0 -j ACCEPT
>iptables -t nat -A PREROUTING -i eth0 -p tcp -j REDIRECT --to-port 9000
>
>Code:
>
> cli_fd = accept(fd, (struct sockaddr *) &cli_addr, &cli_len);
> dst_len = sizeof(dst_addr);
> if(getsockopt(cli_fd, IPPROTO_IP, SO_ORIGINAL_DST, &dst_addr, &dst_len)
>!= 0)
> printf("getsockopt() returned error");
> else
> printf("original destination address: %s:%d\n",
>inet_ntoa(dst_addr.sin_addr), dst_addr.sin_port);
You have to use
else {
char buf[16];
inet_ntop(AF_INET, &dst_addr.sin_addr, dst, sizeof(dst));
printf("%s:%hu\n", buf, ntohs(dst_addr.sin_port));
}
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