1 /* 2 * Copyright 2006, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Oliver Tappe, zooey@hirschkaefer.de 7 */ 8 9 10 #include <arpa/inet.h> 11 #include <netinet/in.h> 12 #include <stdio.h> 13 #include <stdlib.h> 14 #include <string.h> 15 #include <sys/socket.h> 16 17 #define MAXLEN 65536 18 19 20 static void 21 udp_server(int sockFD) 22 { 23 char buf[MAXLEN]; 24 long status; 25 26 while (1) { 27 status = recvfrom(sockFD, buf, MAXLEN-1, 0, NULL, NULL); 28 if (status < 0) { 29 printf("recvfrom(): %lx (%s)\n", status, strerror(status)); 30 exit(5); 31 } 32 buf[status] = 0; 33 printf("%s", buf); 34 } 35 } 36 37 38 int 39 main(int argc, char** argv) 40 { 41 long status; 42 int sockFD; 43 struct sockaddr_in localAddr; 44 45 if (argc < 2) { 46 printf("usage: %s <local-port>\n", argv[0]); 47 exit(5); 48 } 49 50 sockFD = socket(AF_INET, SOCK_DGRAM, 0); 51 52 memset(&localAddr, 0, sizeof(struct sockaddr_in)); 53 localAddr.sin_family = AF_INET; 54 localAddr.sin_port = htons(atoi(argv[1])); 55 printf("binding to port %u\n", ntohs(localAddr.sin_port)); 56 status = bind(sockFD, (struct sockaddr *)&localAddr, sizeof(struct sockaddr_in)); 57 if (status < 0) { 58 printf("bind(): %lx (%s)\n", status, strerror(status)); 59 exit(5); 60 } 61 62 udp_server(sockFD); 63 return 0; 64 } 65