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/* DESC: This script implements an UDP server which is able to receive messages. * Copyright (C) 2012 NetModule AG, Switzerland */ void usage() { printf("usage: udpserver.are <port>\n"); exit(1); } if (argc < 2) { usage(); } PORT = (int) argv[1]; sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if (sock < 0) { printf("Unable to open socket\n"); exit(1); } /* bind socket to 1st LAN interface */ addr = nb_ifc_address("LAN1"); ret = bind(sock, PORT, addr); if(ret == -1) { printf("Unable to bind to port: %d\n", PORT); close(sock); exit(1); } printf("Listening for messages on port %d\n", PORT); while (1) { msg = recvfrom(sock); if (left(msg, 4) == "quit") { printf("Received quit, terminating\n"); break; } else if (msg != "") { printf("Received message '%s'\n", msg); } } close(sock); exit(0);