*** empty log message ***

[ppp.git] / scripts / callback

diff --git a/scripts/callback b/scripts/callback
new file mode 100755 (executable)
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+++ b/scripts/callback
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+#!/bin/sh
+###################################################################
+#
+# Script to dial the remote system, negotiate the connection, and send
+# it the id. Then wait for the modem to disconnect. Reset the modem
+# to answer mode and wait for the system to call back.
+#
+# The telephone number and modempass are used when establishing the
+# connection to the modem.
+#
+PHONE=555-1212
+MODEMPASS=modem_identifier
+#
+# Once the modem calls back, the account name and password are used for
+# a UNIX style login operation.
+#
+ACCOUNT=my_account_name
+PASSWORD=my_password
+
+###################################################################
+#
+# Step 1. Dial the modem and negotiate the initial dialog.
+#         note: the modem is configured to ignore loss of DCD at this point.
+#         it is important that this be performed because the loss of DCD
+#         will normally prevent system from working since 'modem' is used
+#         for pppd.
+#
+#         The script is terminated normally when the carrier is lost.
+#
+chat -v                                                        \
+       TIMEOUT         3                               \
+       ABORT           '\nBUSY\r'                      \
+       ABORT           '\nNO ANSWER\r'                 \
+       ABORT           '\nRINGING\r\n\r\nRINGING\r'    \
+       ''              AT                              \
+       'OK-+++\c-OK'   'AT&C0&D2S0=0H0                 \
+       TIMEOUT         30                              \
+       OK              ATDT$TELEPHONE                  \
+       CONNECT         ''                              \
+       assword:        $MODEMPASS                      \
+       "\nNO CARRIER\r"
+
+if [ "$?" = "0" ]; then
+
+###################################################################
+#
+# Step 2. Wait for the call back from the remote. This will wait for at most
+#         30 seconds for the call back should the first attempt fail or
+#         something happen with the callback logic at the remote.
+#
+#         note: when the callback occurs, the DCD setting is re-enabled.
+#
+# If some voice call should happen during this period, the system will
+# answer the telephone and then hang up on them. I realize that this is
+# rude, but there is little that this script can do.
+#
+  chat -v                                              \
+       TIMEOUT         30                              \
+       ABORT           '\nVOICE\r'                     \
+       '\nRING\r'      'AT&C1A'                        \
+       CONNECT         ''                              \
+       TIMEOUT         10                              \
+       ogin:--ogin:    $ACCOUNT                        \
+       TIMEOUT         45                              \
+       assword:        $PASSWORD
+
+  if [ "$?" = "0" ]; then
+    exit 0
+  fi
+fi
+
+###################################################################
+#
+# The script has failed. Terminate the connection mode.
+#
+chat -v TIMEOUT 3 "" AT 'OK-+++\c-OK' 'AT&C1&D2S0=0H0' OK
+exit 1