On Monday 2010-04-19 22:09, Jan Engelhardt wrote:
>
>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));
^ buf, not dst
> printf("%s:%hu\n", buf, ntohs(dst_addr.sin_port));
>}
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