/* * Perform PPPoE discovery * * Copyright (C) 2000-2001 by Roaring Penguin Software Inc. * Copyright (C) 2004 Marco d'Itri <md@linux.it> * * This program may be distributed according to the terms of the GNU * General Public License, version 2 or (at your option) any later version. * */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <errno.h> #include <string.h> #include "pppoe.h" char *xstrdup(const char *s); void usage(void); void die(int status) { exit(status); } int main(int argc, char *argv[]) { int opt; PPPoEConnection *conn; conn = malloc(sizeof(PPPoEConnection)); if (!conn) fatalSys("malloc"); memset(conn, 0, sizeof(PPPoEConnection)); while ((opt = getopt(argc, argv, "I:D:VUAS:C:h")) > 0) { switch(opt) { case 'S': conn->serviceName = xstrdup(optarg); break; case 'C': conn->acName = xstrdup(optarg); break; case 'U': conn->useHostUniq = 1; break; case 'D': conn->debugFile = fopen(optarg, "w"); if (!conn->debugFile) { fprintf(stderr, "Could not open %s: %s\n", optarg, strerror(errno)); exit(1); } fprintf(conn->debugFile, "pppoe-discovery %s\n", VERSION); break; case 'I': conn->ifName = xstrdup(optarg); break; case 'A': /* this is the default */ break; case 'V': case 'h': usage(); exit(0); default: usage(); exit(1); } } /* default interface name */ if (!conn->ifName) conn->ifName = strdup("eth0"); conn->discoverySocket = -1; conn->sessionSocket = -1; conn->printACNames = 1; discovery(conn); exit(0); } void rp_fatal(char const *str) { char buf[1024]; printErr(str); sprintf(buf, "pppoe-discovery: %.256s", str); exit(1); } void fatalSys(char const *str) { char buf[1024]; int i = errno; sprintf(buf, "%.256s: %.256s", str, strerror(i)); printErr(buf); sprintf(buf, "pppoe-discovery: %.256s: %.256s", str, strerror(i)); exit(1); } void sysErr(char const *str) { rp_fatal(str); } char *xstrdup(const char *s) { register char *ret = strdup(s); if (!ret) sysErr("strdup"); return ret; } void usage(void) { fprintf(stderr, "Usage: pppoe-discovery [options]\n"); fprintf(stderr, "\nVersion " VERSION "\n"); }