release/src/router/ppp/pppd/plugins/pppoe/pppd_utils.c

   1 /* PPPoE support library "libpppoe"
   2  *
   3  * Copyright 2000 Michal Ostrowski <mostrows@styx.uwaterloo.ca>,
   4  *                Jamal Hadi Salim <hadi@cyberus.ca>
   5  *
   6  *  This program is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU General Public License
   8  *  as published by the Free Software Foundation; either version
   9  *  2 of the License, or (at your option) any later version.
  10  */
  11 #include "pppoe.h"
  12
  13 /*
  14  *
  15  */
  16 int build_ppp_opts(char *args[],struct session *ses)
  17 {
  18     char buf[256];
  19     int retval=0,i=0;
  20
  21     memset(buf,0,256);
  22
  23 /* pppds path */
  24     if ( NULL != ses->filt->pppd){
  25         args[0]=(char *)malloc(strlen(ses->filt->pppd));
  26         strcpy (args[0],ses->filt->pppd);
  27     } else {
  28         args[0]=(char *)malloc(strlen(_PATH_PPPD));
  29         strcpy (args[0],_PATH_PPPD);
  30     }
  31
  32 /*  long device name */
  33     snprintf(buf, 256,"%02x:%02x:%02x:%02x:%02x:%02x/%04x/%s",
  34              ses->remote.sll_addr[0],
  35              ses->remote.sll_addr[1],
  36              ses->remote.sll_addr[2],
  37              ses->remote.sll_addr[3],
  38              ses->remote.sll_addr[4],
  39              ses->remote.sll_addr[5],
  40              ses->sp.sa_addr.pppoe.sid,
  41              ses->name);
  42     args[1]=(char *)malloc(strlen(buf));
  43     strcpy(args[1],buf);
  44
  45     i=2;
  46
  47 /* override options file */
  48     if (NULL != ses->filt->fname ) {
  49
  50         if (!ses->filt->peermode) {
  51             args[i]=(char *)malloc(strlen("file"));
  52             strcpy (args[i],"file");
  53             i++;
  54             args[i]=(char *)malloc(strlen(ses->filt->fname)+1);
  55             strcpy (args[i],ses->filt->fname);
  56             i++;
  57         } else{ /* peermode */
  58             args[i]=(char *)malloc(strlen("call"));
  59             strcpy (args[i],"call");
  60             i++;
  61             args[i]=(char *)malloc(strlen(ses->filt->fname)+1);
  62             strcpy (args[i],ses->filt->fname);
  63             i++;
  64         }
  65     }
  66
  67 /* user requested for a specific name */
  68     if (NULL != ses->filt->ntag) {
  69         if ( NULL != ses->filt->ntag->tag_data) {
  70             args[i]=(char *)malloc(strlen("pppoe_ac_name"));
  71             strcpy(args[i],"pppoe_ac_name");
  72             i++;
  73             args[i]=(char *)malloc(ntohs(ses->filt->ntag->tag_len));
  74             strcpy(args[i],ses->filt->ntag->tag_data);
  75             i++;
  76         }
  77     }
  78 /* user requested for a specific service name */
  79     if (NULL != ses->filt->stag) {
  80         if ( NULL != ses->filt->stag->tag_data) {
  81             args[i]=(char *)malloc(strlen("pppoe_srv_name"));
  82             strcpy(args[i],"pppoe_srv_name");
  83             i++;
  84             args[i]=(char *)malloc(ntohs(ses->filt->stag->tag_len));
  85             strcpy(args[i],ses->filt->stag->tag_data);
  86             i++;
  87         }
  88     }
  89
  90 /*
  91  */
  92     if (ses->opt_daemonize) {
  93         args[i]=(char *)malloc(strlen("nodetach"));
  94         strcpy(args[i],"nodetach");
  95         i++;
  96     }
  97
  98     args[i]=NULL;
  99     {
 100         int j;
 101         poe_info(ses,"calling pppd with %d args\n",i);
 102         j=i;
 103         for (i=0; i<j,NULL !=args[i]; i++) {
 104             poe_info(ses," <%d: %s > \n",i,args[i]);
 105         }
 106     }
 107     return retval;
 108 }
 109
 110
 111 /*
 112  *
 113  */
 114 int ppp_connect (struct session *ses)
 115 {
 116     int ret,pid;
 117     char *args[32];
 118
 119
 120     poe_info(ses,"calling ses_connect\n");
 121     do{
 122         ret = session_connect(ses);
 123     }while(ret == 0);
 124
 125     if (ret > 0 )
 126         if (ses->np == 1 && ret == 1)
 127             return ses->np; /* -G */
 128     if (ses->np == 2)
 129         return ses->np; /* -H */
 130
 131     if( ret <= 0){
 132         return ret;
 133     }
 134
 135     poe_info(ses,"DONE calling ses_connect np is %d \n",ses->np);
 136
 137
 138     pid = fork ();
 139     if (pid < 0) {
 140         poe_error (ses,"unable to fork() for pppd: %m");
 141         poe_die (-1);
 142     }
 143
 144
 145     if(!pid) {
 146         poe_info(ses,"calling build_ppp_opts\n");
 147         if (0> build_ppp_opts(args,ses)) {
 148             poe_error(ses,"ppp_connect: failed to build ppp_opts\n");
 149             return -1;
 150         }
 151         execvp(args[0],args);
 152         poe_info (ses," child got killed");
 153     } else if( ses->type == SESSION_CLIENT) {
 154         if (!ses->opt_daemonize)
 155             return 1;
 156         pause();
 157         poe_info (ses," OK we got killed");
 158         return -1;
 159     }
 160     return 1;
 161 }
 162