release/src/router/ppp/scripts/callback

   1 #!/bin/sh
   2 ###################################################################
   3 #
   4 # Script to dial the remote system, negotiate the connection, and send
   5 # it the id. Then wait for the modem to disconnect. Reset the modem
   6 # to answer mode and wait for the system to call back.
   7 #
   8 # The telephone number and modempass are used when establishing the
   9 # connection to the modem.
  10 #
  11 PHONE=555-1212
  12 MODEMPASS=modem_identifier
  13 #
  14 # Once the modem calls back, the account name and password are used for
  15 # a UNIX style login operation.
  16 #
  17 ACCOUNT=my_account_name
  18 PASSWORD=my_password
  19
  20 ###################################################################
  21 #
  22 # Step 1. Dial the modem and negotiate the initial dialog.
  23 #         note: the modem is configured to ignore loss of DCD at this point.
  24 #         it is important that this be performed because the loss of DCD
  25 #         will normally prevent system from working since 'modem' is used
  26 #         for pppd.
  27 #
  28 #         The script is terminated normally when the carrier is lost.
  29 #
  30 chat -v                                                 \
  31         TIMEOUT         3                               \
  32         ABORT           '\nBUSY\r'                      \
  33         ABORT           '\nNO ANSWER\r'                 \
  34         ABORT           '\nRINGING\r\n\r\nRINGING\r'    \
  35         ''              AT                              \
  36         'OK-+++\c-OK'   'AT&C0&D2S0=0H0                 \
  37         TIMEOUT         30                              \
  38         OK              ATDT$TELEPHONE                  \
  39         CONNECT         ''                              \
  40         assword:        $MODEMPASS                      \
  41         "\nNO CARRIER\r"
  42
  43 if [ "$?" = "0" ]; then
  44
  45 ###################################################################
  46 #
  47 # Step 2. Wait for the call back from the remote. This will wait for at most
  48 #         30 seconds for the call back should the first attempt fail or
  49 #         something happen with the callback logic at the remote.
  50 #
  51 #         note: when the callback occurs, the DCD setting is re-enabled.
  52 #
  53 # If some voice call should happen during this period, the system will
  54 # answer the telephone and then hang up on them. I realize that this is
  55 # rude, but there is little that this script can do.
  56 #
  57   chat -v                                               \
  58         TIMEOUT         30                              \
  59         ABORT           '\nVOICE\r'                     \
  60         '\nRING\r'      'AT&C1A'                        \
  61         CONNECT         ''                              \
  62         TIMEOUT         10                              \
  63         ogin:--ogin:    $ACCOUNT                        \
  64         TIMEOUT         45                              \
  65         assword:        $PASSWORD
  66
  67   if [ "$?" = "0" ]; then
  68     exit 0
  69   fi
  70 fi
  71
  72 ###################################################################
  73 #
  74 # The script has failed. Terminate the connection mode.
  75 #
  76 chat -v TIMEOUT 3 "" AT 'OK-+++\c-OK' 'AT&C1&D2S0=0H0' OK
  77 exit 1