src/ppp/dialer

   1 #!/bin/bash
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012  IPFire Network Development Team                         #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 LOG_FACILITY=$(basename ${0})
  23
  24 # Do not print any log messages because these may be sent to the modem.
  25 LOG_DISABLE_STDOUT="true"
  26
  27 . /usr/lib/network/functions
  28
  29 # Read network settings
  30 network_settings_read
  31
  32 log DEBUG "dialer called with arguments: $@"
  33
  34 # The zone is an optional argument.
  35 ZONE=${1}
  36 assert isset ZONE
  37
  38 # If we have the zone information, we will
  39 # load the zone configuration.
  40 if zone_exists ${ZONE}; then
  41         zone_settings_read "${ZONE}"
  42 fi
  43
  44 # The default speaker settings is on.
  45 at_speaker=${AT_SPEAKER_ON}
  46
  47 # The default dial method is tone dial.
  48 at_dial=${AT_TONE_DIAL}
  49
  50 # Initalize the commandline
  51 commandline=""
  52
  53 # If we are running in debug mode, we start chat with the
  54 # verbose flag as well.
  55 if enabled DEBUG; then
  56         commandline="${commandline} -v"
  57 fi
  58
  59 # Create a temporary chat script file.
  60 file=$(mktemp)
  61 commandline="${commandline} -f ${file}"
  62
  63 # Helper function to write beatiful lines to
  64 # the chat scripts.
  65 function println() {
  66         printf "%-30s %s\n" "$@" >> ${file}
  67 }
  68
  69 ### Write the connect script.
  70
  71 # Set the timeout value for the configuration commands to
  72 # 3 seconds. This will be increased later.
  73 println "TIMEOUT" 3
  74
  75 # Let's log everything until we are properly connected.
  76 println "REPORT" "CONNECT"
  77
  78 # End the connection, when one of the following conditions
  79 # happens:
  80 for condition in "BUSY" "NO ANSWER" "NO CARRIER" "NO DIALTONE"; do
  81         println "ABORT" "'${condition}'"
  82 done
  83
  84 # Now, we get to the exciting stuff.
  85 # Initalize the modem.
  86 println "''" "${AT_INITIALIZE}"
  87 println "''" "AT"
  88 println "''" "${AT_INITIALIZE}"
  89
  90 # End all left over connections by hanging up.
  91 println "OK" "${AT_HANGUP}"
  92
  93 # Apply the speaker setting.
  94 println "OK" "${at_speaker}"
  95
  96 # Set the APN if any.
  97 if isset APN; then
  98         println "''" "'AT+CGDCONT=1,\"IP\",\"${APN}\"'"
  99 fi
 100
 101 # Enter a 5 seconds break so the modem can setup itself
 102 # to the settings we just transmitted to it.
 103 for i in $(seq 0 5); do
 104         println "''" "\\d"
 105 done
 106
 107 # Reset the timeout value to 30 seconds.
 108 println "TIMEOUT" 30
 109
 110 # Actually dial the number.
 111 println "OK" "${at_dial}${PHONE_NUMBER}"
 112
 113 # Wait for the CONNECT string.
 114 println "CONNECT" "\\c"
 115
 116 # If login credentials were set, we send them.
 117 if isset USERNAME && isset PASSWORD; then
 118         println "ogin:--ogin:" "${USERNAME}"
 119         println "assword:" "${PASSWORD}"
 120 fi
 121
 122 # Exec the chat command which will start talking to the modem.
 123 log DEBUG "Exec'ing chat with command line: ${commandline}"
 124 exec chat ${commandline}
 125
 126 error "Could not execute chat. Exiting."
 127 exit ${EXIT_ERROR}