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 log DEBUG "dialer called with arguments: $@"
  30
  31 # The zone is an optional argument.
  32 ZONE=${1}
  33 assert isset ZONE
  34
  35 # If we have the zone information, we will
  36 # load the zone configuration.
  37 if zone_exists ${ZONE}; then
  38         zone_config_read ${ZONE}
  39 fi
  40
  41 # The default speaker settings is on.
  42 at_speaker=${AT_SPEAKER_ON}
  43
  44 # The default dial method is tone dial.
  45 at_dial=${AT_TONE_DIAL}
  46
  47 # Initalize the commandline
  48 commandline=""
  49
  50 # If we are running in debug mode, we start chat with the
  51 # verbose flag as well.
  52 if enabled DEBUG; then
  53         commandline="${commandline} -v"
  54 fi
  55
  56 # Create a temporary chat script file.
  57 file=$(mktemp)
  58 commandline="${commandline} -f ${file}"
  59
  60 # Helper function to write beatiful lines to
  61 # the chat scripts.
  62 function println() {
  63         printf "%-30s %s\n" "$@" >> ${file}
  64 }
  65
  66 ### Write the connect script.
  67
  68 # Set the timeout value for the configuration commands to
  69 # 3 seconds. This will be increased later.
  70 println "TIMEOUT" 3
  71
  72 # Let's log everything until we are properly connected.
  73 println "REPORT" "CONNECT"
  74
  75 # End the connection, when one of the following conditions
  76 # happens:
  77 for condition in "BUSY" "NO ANSWER" "NO CARRIER" "NO DIALTONE"; do
  78         println "ABORT" "'${condition}'"
  79 done
  80
  81 # Now, we get to the exciting stuff.
  82 # Initalize the modem.
  83 println "''" "${AT_INITIALIZE}"
  84 println "''" "AT"
  85 println "''" "${AT_INITIALIZE}"
  86
  87 # End all left over connections by hanging up.
  88 println "OK" "${AT_HANGUP}"
  89
  90 # Apply the speaker setting.
  91 println "OK" "${at_speaker}"
  92
  93 # Set the APN if any.
  94 if isset APN; then
  95         println "''" "'AT+CGDCONT=1,\"IP\",\"${APN}\"'"
  96 fi
  97
  98 # Enter a 5 seconds break so the modem can setup itself
  99 # to the settings we just transmitted to it.
 100 for i in $(seq 0 5); do
 101         println "''" "\\d"
 102 done
 103
 104 # Reset the timeout value to 30 seconds.
 105 println "TIMEOUT" 30
 106
 107 # Actually dial the number.
 108 println "OK" "${at_dial}${PHONE_NUMBER}"
 109
 110 # Wait for the CONNECT string.
 111 println "CONNECT" "\\c"
 112
 113 # If login credentials were set, we send them.
 114 if isset USERNAME && isset PASSWORD; then
 115         println "ogin:--ogin:" "${USERNAME}"
 116         println "assword:" "${PASSWORD}"
 117 fi
 118
 119 # Exec the chat command which will start talking to the modem.
 120 log DEBUG "Exec'ing chat with command line: ${commandline}"
 121 exec chat ${commandline}
 122
 123 error "Could not execute chat. Exiting."
 124 exit ${EXIT_ERROR}