1#!/usr/bin/perl -w
2
3# Auto dial script by Brian May <bam@snoopy.apana.org.au>
4
5use Proc::Daemon;
6use strict;
7use Sys::Syslog qw(:DEFAULT setlogsock);  # default set, plus setlogsock
8use Proc::WaitStat qw(:DEFAULT waitstat);
9
10
11Proc::Daemon::Init;
12open(PIDFILE,">/var/run/autopppd.pid");
13print(PIDFILE "$$");
14close(PIDFILE);
15
16sub toseconds($) {
17  my ($hours,$minutes,$seconds) = split(/:/,shift);
18  return ($hours*60+$minutes)*60+$seconds;
19}
20
21sub dseconds($) {
22  my ($total) = @_;
23
24  my $seconds = $total % 60; $total = ($total - $seconds)/60;
25  my $minutes = $total % 60; $total = ($total - $minutes)/60;
26  my $hours   = $total % 24; $total = ($total - $hours)/24;
27  my $days   = $total;
28  if ($days > 0) {
29    return(sprintf("%d-%02d:%02d:%02d",$days,$hours,$minutes,$seconds));
30  } else {
31    return(sprintf("%02d:%02d:%02d",$hours,$minutes,$seconds));
32  }
33}
34
35my $program="autopppd";
36
37setlogsock('unix');
38openlog($program, 'cons,pid', 'daemon');
39
40my $pppd_start_time;
41my $pppd_end_time;
42my $pppd_run_time;
43my $pppd_fail;
44my $delay=0;
45my $idelay=0;
46
47my @delays = (
48               toseconds("00:01:00"), # 1 minute
49               toseconds("00:07:00"), # 8 minutes
50               toseconds("00:07:00"), # 15 minutes
51               toseconds("00:15:00"), # 30 minutes
52               toseconds("00:30:00"), # 1 hour
53               toseconds("01:00:00"), # 2 hours
54               toseconds("01:00:00"), # 3 hours
55               toseconds("03:00:00"), # 6 hours
56               toseconds("06:00:00"), # 12 hours
57               toseconds("12:00:00"), # 24 hours
58               toseconds("24:00:00")  # 48 hours
59             );
60
61# action == 0 => immediate retry (!FIXME! needs to have some delay)
62# action == 1 => delayed retry
63# action == 2 => abort
64
65my $code = {
66  0 => { message=>"pppd detached",                              action=> 2 },
67  1 => { message=>"fatal error",                                action=> 2 },
68  2 => { message=>"options error",                              action=> 2 },
69  3 => { message=>"not setuid-root error",                      action=> 2 },
70  4 => { message=>"no kernel support for PPP",                  action=> 2 },
71  5 => { message=>"SIGINT or SIGTERM or SIGHUP",                action=> 1 },
72  6 => { message=>"Serial port locked",                         action=> 1 }, # should be 0
73  7 => { message=>"Serial port open error",                     action=> 1 },
74  8 => { message=>"Connect failed",                             action=> 1 },
75  9 => { message=>"Could not execute pty command",              action=> 1 },
76 10 => { message=>"PPP negotiation failed",                     action=> 1 },
77 11 => { message=>"Peer failed to authenticate",                action=> 1 },
78 12 => { message=>"Link was idle",                              action=> 1 },
79 13 => { message=>"Time limit exceeded",                        action=> 1 },
80 14 => { message=>"call back not implemented",                  action=> 2 },
81 15 => { message=>"peer not responding",                        action=> 1 },
82 16 => { message=>"modem hang up",                              action=> 1 },
83 17 => { message=>"Serial loopback detected",                   action=> 1 },
84 18 => { message=>"Init script failed",                         action=> 1 },
85 19 => { message=>"We failed to authenticate",                  action=> 1 },
86};
87
88while (1)
89{
90  $pppd_start_time=time;
91  syslog('info', 'restarting pppd');
92
93  # logging sometimes stopped working after ppp was running for
94  # some time. lets see if closing and reopening the log file helps...
95  closelog();
96
97  # run ppp
98  my $rc=system("pppd","-detach",@ARGV);
99
100  # reopon log file
101  openlog($program, 'cons,pid', 'daemon');
102
103  # calculate run time
104  $pppd_end_time=time;
105  $pppd_run_time=$pppd_end_time-$pppd_start_time;
106
107  my $pppd_code = ($? >> 8);
108  my $pppd_signal = $? & 127;
109  my $pppd_coredump = $? & 128;
110
111  $pppd_fail = 1;
112  if ($pppd_signal != 0) {
113    if ($pppd_coredump)
114    { syslog('err',"pppd died with signal $pppd_signal, coredump"); }
115    else
116    { syslog('err',"pppd died with signal $pppd_signal"); }
117  }
118  elsif ($pppd_coredump) {
119    syslog('err',"pppd died with coredump");
120  }
121  elsif (defined($code->{$pppd_code}) && $code->{$pppd_code}{"action"} == 0) {
122    syslog('err', "pppd returned: ".$code->{$pppd_code}{"message"}." ($pppd_code), immediate retry");
123    $pppd_fail = 0;
124  }
125  elsif (defined($code->{$pppd_code}) && $code->{$pppd_code}{"action"} == 1) {
126    syslog('err', "pppd returned: ".$code->{$pppd_code}{"message"}." ($pppd_code), delayed retry");
127    $pppd_fail = 1;
128  }
129  elsif (defined($code->{$pppd_code}) && $code->{$pppd_code}{"action"} >= 2) {
130    syslog('err', "pppd returned: ".$code->{$pppd_code}{"message"}." ($pppd_code), aborting");
131    exit(255);
132  }
133  elsif (defined($code->{$pppd_code}) && $code->{$pppd_code}{"action"} >= 2) {
134    syslog('err', "pppd returned: unknown error ($pppd_code), delayed retry");
135    $pppd_fail = 1;
136  }
137  # if it hasn't ran for at least an hour, then somthing went wrong
138  elsif ($pppd_run_time < toseconds("01:00:00")) {
139    syslog('err',"pppd session didn't last 1 hour, delayed retry");
140    $pppd_fail = 1;
141  }
142  else { $pppd_fail = 0; }
143
144  # if not failed, then reset delay.
145  if (!$pppd_fail) { $idelay = 0; }
146
147  # get next delay.
148  $delay = $delays[$idelay];
149
150  # log statistics.
151  syslog('info',"rc=".waitstat($rc)." runtime=".dseconds($pppd_run_time)." delay[$idelay]=".dseconds($delay)."");
152
153  # delay for desired time.
154  sleep($delay);
155
156  # increment delay for next time.
157  if (defined($delays[$idelay+1])) { $idelay++; }
158}
159
160closelog();
161