gistfile1.txt

#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define STATS_IN_PORT 8126
#define STATS_OUT_IP "127.0.0.1"
#define STATS_OUT_PORT 18126

int main(int argc, char **argv)
{
  int sock, out_sock, s;
	struct sockaddr_in us = { 0 }, sender = { 0 }, them = { 0 };
	socklen_t socklen = sizeof(us);
	static char buffer[65535];


	sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (sock < 0) {
		perror("socket error");
		return 1;
	}
	us.sin_family = AF_INET;
	us.sin_port = htons(STATS_IN_PORT);
	us.sin_addr.s_addr = htonl(INADDR_ANY);

	out_sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (out_sock < 0) {
		perror("socket error");
		return 1;
	}
	them.sin_family = AF_INET;
	them.sin_port = htons(STATS_OUT_PORT);
	s = inet_aton(STATS_OUT_IP, &them.sin_addr);
	if (s < 0) {
		perror("inet_aton failed");
		return 1;
	}

	if (bind(sock, (struct sockaddr *)&us, sizeof(us)) < 0) {
		perror("bind failed");
		return 1;
	}


	while (1) {
		int i;
		unsigned char shard = 0xff;
		s = recvfrom(sock, buffer, sizeof(buffer), 0, (struct sockaddr *)&sender, &socklen);
		if (s < 0) {
			if (errno != EINTR) {
				perror("recvfrom failed");
				return 1;
			}
		}

		for (i = 0; i < s; i++)
			shard += buffer[i];
		sendto(out_sock, buffer, s, 0, (struct sockaddr *)&them, sizeof(them));
		//printf("%d %s\n", shard, buffer);
	}


	return 0;
}