1/* 2 * Perform PPPoE discovery 3 * 4 * Copyright (C) 2000-2001 by Roaring Penguin Software Inc. 5 * Copyright (C) 2004 Marco d'Itri <md@linux.it> 6 * 7 * This program may be distributed according to the terms of the GNU 8 * General Public License, version 2 or (at your option) any later version. 9 * 10 */ 11 12#include <stdio.h> 13#include <stdlib.h> 14#include <unistd.h> 15#include <errno.h> 16#include <string.h> 17 18#include "pppoe.h" 19 20char *xstrdup(const char *s); 21void usage(void); 22 23void die(int status) 24{ 25 exit(status); 26} 27 28int main(int argc, char *argv[]) 29{ 30 int opt; 31 PPPoEConnection *conn; 32 33 conn = malloc(sizeof(PPPoEConnection)); 34 if (!conn) 35 fatalSys("malloc"); 36 37 memset(conn, 0, sizeof(PPPoEConnection)); 38 39 while ((opt = getopt(argc, argv, "I:D:VUAS:C:h")) > 0) { 40 switch(opt) { 41 case 'S': 42 conn->serviceName = xstrdup(optarg); 43 break; 44 case 'C': 45 conn->acName = xstrdup(optarg); 46 break; 47 case 'U': 48 conn->useHostUniq = 1; 49 break; 50 case 'D': 51 conn->debugFile = fopen(optarg, "w"); 52 if (!conn->debugFile) { 53 fprintf(stderr, "Could not open %s: %s\n", 54 optarg, strerror(errno)); 55 exit(1); 56 } 57 fprintf(conn->debugFile, "pppoe-discovery %s\n", VERSION); 58 break; 59 case 'I': 60 conn->ifName = xstrdup(optarg); 61 break; 62 case 'A': 63 /* this is the default */ 64 break; 65 case 'V': 66 case 'h': 67 usage(); 68 exit(0); 69 default: 70 usage(); 71 exit(1); 72 } 73 } 74 75 /* default interface name */ 76 if (!conn->ifName) 77 conn->ifName = strdup("eth0"); 78 79 conn->discoverySocket = -1; 80 conn->sessionSocket = -1; 81 conn->printACNames = 1; 82 83 discovery(conn); 84 exit(0); 85} 86 87void rp_fatal(char const *str) 88{ 89 char buf[1024]; 90 91 printErr(str); 92 sprintf(buf, "pppoe-discovery: %.256s", str); 93 exit(1); 94} 95 96void fatalSys(char const *str) 97{ 98 char buf[1024]; 99 int i = errno; 100 101 sprintf(buf, "%.256s: %.256s", str, strerror(i)); 102 printErr(buf); 103 sprintf(buf, "pppoe-discovery: %.256s: %.256s", str, strerror(i)); 104 exit(1); 105} 106 107void sysErr(char const *str) 108{ 109 rp_fatal(str); 110} 111 112char *xstrdup(const char *s) 113{ 114 register char *ret = strdup(s); 115 if (!ret) 116 sysErr("strdup"); 117 return ret; 118} 119 120void usage(void) 121{ 122 fprintf(stderr, "Usage: pppoe-discovery [options]\n"); 123 fprintf(stderr, "\nVersion " VERSION "\n"); 124} 125