/*

 * Copyright 2006, Haiku, Inc. All Rights Reserved.

 * Distributed under the terms of the MIT License.

 *

 * Authors:

 *              Oliver Tappe, zooey@hirschkaefer.de

 */


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

#define MAXLEN 65536


static void
udp_server(int sockFD)
{
        char buf[MAXLEN];
        long status;

        while (1) {
                status = recvfrom(sockFD, buf, MAXLEN-1, 0, NULL, NULL);
                if (status < 0) {
                        printf("recvfrom(): %lx (%s)\n", status, strerror(status));
                        exit(5);
                }
                buf[status] = 0;
                printf("%s", buf);
        }
}


int
main(int argc, char** argv)
{
        long status;
        int sockFD;
        struct sockaddr_in localAddr;

        if (argc < 2) {
                printf("usage: %s <local-port>\n", argv[0]);
                exit(5);
        }

        sockFD = socket(AF_INET, SOCK_DGRAM, 0);

        memset(&localAddr, 0, sizeof(struct sockaddr_in));
        localAddr.sin_family = AF_INET;
        localAddr.sin_port = htons(atoi(argv[1]));
        printf("binding to port %u\n", ntohs(localAddr.sin_port));
        status = bind(sockFD, (struct sockaddr *)&localAddr, sizeof(struct sockaddr_in));
        if (status < 0) {
                printf("bind(): %lx (%s)\n", status, strerror(status));
                exit(5);
        }

        udp_server(sockFD);
        return 0;
}