Home | History | Annotate | Download | only in rp-pppoe 
      1 /*
      2  * Perform PPPoE discovery
      3  *
      4  * Copyright (C) 2000-2001 by Roaring Penguin Software Inc.
      5  * Copyright (C) 2004 Marco d'Itri <md (at) 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 
     20 char *xstrdup(const char *s);
     21 void usage(void);
     22 
     23 void die(int status)
     24 {
     25 	exit(status);
     26 }
     27 
     28 int 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 
     87 void 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 
     96 void 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 
    107 void sysErr(char const *str)
    108 {
    109     rp_fatal(str);
    110 }
    111 
    112 char *xstrdup(const char *s)
    113 {
    114     register char *ret = strdup(s);
    115     if (!ret)
    116 	sysErr("strdup");
    117     return ret;
    118 }
    119 
    120 void usage(void)
    121 {
    122     fprintf(stderr, "Usage: pppoe-discovery [options]\n");
    123     fprintf(stderr, "\nVersion " VERSION "\n");
    124 }
    125