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#!/bin/sh
#------------------------------------------------------------------------
#
# $Sendmail: dynamic,v @sm_version@ @sm_date@ @sm_time@ cowboy Exp $
#
# Shell functions to handle dynamic network updates.
# Supports ppp, dhcp, ifup/down, etc.
#
# Copyright (c) 2004-@SM_CPYRT@ Richard Nelson. All Rights Reserved.
#
#------------------------------------------------------------------------
#
provider_m4='@sysconfdir@/mail/m4/provider.m4';
dialup_m4='@sysconfdir@/mail/m4/dialup.m4';
# Default values
SM_ignore=1;
SM_changed=0;
SM_delay=0;
SM_interface='';
SM_state='down';
SM_provider='';
SM_ip='';
SM_host='';
SM_debug=1;
# Path to other sendmail helpers
if [ -x ./update_sendmail ]; then
sm_path='.';
elif [ -x $(dirname $0)/update_sendmail ]; then
sm_path=$(dirname $0);
else
sm_path=@datadir@/sendmail;
fi;
# Bring in sendmail.conf for the network definitions
if [ ! -f @sysconfdir@/mail/sendmail.conf ]; then
if [ -x $sm_path/update_conf ]; then
$sm_path/update_conf;
fi;
fi;
DAEMON_NETMODE='Static';
DAEMON_NETIF='';
HANDS_OFF='No';
LOG_CMDS='No';
if [ -f @sysconfdir@/mail/sendmail.conf ]; then
. @sysconfdir@/mail/sendmail.conf;
fi;
# Record information on an interface and its status
update_interface() {
SM_interface="$1";
SM_reason="$2";
# Do absolutely nothing if they say so...
if [ "$HANDS_OFF" != 'No' ]; then
return;
fi;
if [ -z "$SM_interface" ]; then
SM_ignore=1;
return;
fi;
# Check to see if we care about this interface
for if in $DAEMON_NETIF; do
if [ "$if" = "$SM_interface" ]; then
SM_ignore=0;
break;
fi;
done;
case "$SM_reason" in
DOWN|EXPIRE|FAIL|RELEASE|STOP) # and TIMEOUT too ??
SM_state='down';
;;
UP|BOUND|RENEW|REBIND|REBOOT|TIMEOUT)
SM_state='up';
if [ "$SM_reason" = "BOUND" ]; then
SM_changed=1;
fi;
;;
esac;
# Mark what we're doing...
local msg="$SM_interface $SM_state $SM_provider $SM_ip $SM_host";
if [ "$LOG_CMDS" != 'No' ]; then
logger -i -p mail.debug -- "$0 update_interface: $msg";
fi;
};
# Record information about the upstream provider
update_provider() {
SM_provider="$1";
# Mark what we're doing...
local msg="$SM_interface $SM_state $SM_provider $SM_ip $SM_host";
if [ "$LOG_CMDS" != 'No' ]; then
logger -i -p mail.debug -- "$0 update_provider: $msg";
fi;
# Do absolutely nothing if they say so...
if [ "$HANDS_OFF" != 'No' ]; then
return;
fi;
if [ $SM_ignore != 0 ]; then
return;
fi;
# Add smarthost information (if any)...
# But not if provider.m4 is a link !
if [ -z "$SM_provider" ]; then
return;
fi;
if [ ! -e "@sysconfdir@/mail/peers/$SM_provider" ]; then
SM_provider='default';
fi;
if [ -e "@sysconfdir@/mail/peers/$SM_provider" ] \
&& [ ! -L "$provider_m4" ]; then
SM_changed=1;
cat <<-EOT > "$provider_m4";
LOCAL_CONFIG
#------------------------------------------------------------
#
# Dynamic provider updates from $0
#
# NOTE: the following line *MUST* be in @sysconfdir@/mail/sendmail.mc
dnl include(\`@sysconfdir@/mail/provider.m4')dnl
# You may also need to include this file in submit.mc !
#
# Provider information from @sysconfdir@/mail/peers/$SM_provider
EOT
cat "@sysconfdir@/mail/peers/$SM_provider" >> "$provider_m4";
cat <<-EOT >> "$provider_m4";
#------------------------------------------------------------
EOT
fi;
};
# Record information on an ip/host
update_host() {
SM_ip="$1";
# Mark what we're doing...
local msg="$SM_interface $SM_state $SM_provider $SM_ip $SM_host";
if [ "$LOG_CMDS" != 'No' ]; then
logger -i -p mail.debug -- "$0 update_host: $msg";
fi;
# Do absolutely nothing if they say so...
if [ "$HANDS_OFF" != 'No' ]; then
return;
fi;
if [ $SM_ignore != 0 ]; then
return;
fi;
if [ -z "$SM_ip" ]; then
return;
fi;
find_host;
# Add ip related information (if any)...
# But not if dialup.m4 is a link !
if [ ! -L "$dialup_m4" ]; then
SM_changed=1;
cat <<-EOT > "$dialup_m4";
LOCAL_CONFIG
#------------------------------------------------------------
#
# Dynamic host/ip updates from $0
#
# NOTE: the following line *MUST* be in @sysconfdir@/mail/sendmail.mc
dnl include(\`@sysconfdir@/mail/dialup.m4')dnl
# This should *NOT* be included in submit.mc !
#
# Make sure we accept mail as this ip (for bounces, etc)
Cw$SM_ip
EOT
if [ -n "$SM_host" ]; then
cat <<-EOT >> "$dialup_m4";
#
# Define our true hostname (from our ISP) - becomes \$j
define(\`confDOMAIN_NAME', \`$SM_host')dnl
#
# Make sure we accept mail as this name (for bounces, etc)
Cw$SM_host
#
# Add our hostname to class G for genericstable support
CG$SM_host
#------------------------------------------------------------
EOT
fi;
fi;
};
find_host() {
# Determine our fqdn from our ISP
maxloop=30;
cntr=0;
SM_host='';
until (test ! -z "$SM_host"); do
cntr=`expr $cntr + 1`;
if [ $cntr -gt $maxloop ]; then
SM_host='';
break;
fi;
rev=$(host $SM_ip);
SM_host=$(echo "$rev" | grep '^Name:' | awk '{print $2}');
if [ -z "$SM_host" ]; then
test=$(echo "$rev" | egrep -e 'not found:');
if [ -n "$test" ]; then
continue;
else
SM_host=${rev##*domain name pointer };
SM_host=${SM_host%.};
fi;
fi;
test=$(echo $SM_host | cut -d ' ' -f 1);
if [ "$test" = ";;" ]; then
:;
elif [ "$test" != "**" ]; then
break;
fi;
sleep 1s;
done;
echo "addr=$SM_ip, name=$SM_host";
};
update_sendmail() {
# Mark what we're doing...
local msg="$SM_interface $SM_state $SM_provider $SM_ip $SM_host";
if [ "$LOG_CMDS" != 'No' ]; then
logger -i -p mail.debug -- "$0 update_sendmail: $msg";
fi;
# Do absolutely nothing if they say so...
if [ "$HANDS_OFF" != 'No' ]; then
return;
fi;
if [ $SM_ignore != 0 ]; then
return;
fi;
# Check for a delayed restart (for DHCP)
case "$1" in
[Dd]*)
if [ "$SM_state" = 'up' ]; then
SM_delay=1;
fi;
;;
esac;
if [ "$SM_state" = 'down' ]; then
SM_changed=1;
cat <<-EOT > "$dialup_m4";
LOCAL_CONFIG
#------------------------------------------------------------
#
# $SM_interface is $SM_state
#
# NOTE: the following line *MUST* be in @sysconfdir@/mail/sendmail.mc
dnl include(\`@sysconfdir@/mail/dialup.m4')dnl
# This should *NOT* be included in submit.mc !
#
# sendmail is to only queue messages until connected again
define(\`confDELIVERY_MODE', \`deferred')dnl
#
# Allow the queue to age without carping every four hours
define(\`confTO_QUEUEWARN',\`1d')dnl
#
# Don't keep host status while the network is down
define(\`confHOST_STATUS_DIRECTORY')dnl
#------------------------------------------------------------
EOT
fi;
if [ $SM_changed = 1 ]; then
# Build a new sendmail.cf from sendmail.mc, including our address.
make -f @sysconfdir@/mail/Makefile sendmail.cf;
make -f @sysconfdir@/mail/Makefile;
# Purge any latent host status that might cause us to *NOT* send mail
if [ "$SM_state" = "up" ]; then
AM='-Am';
if [ ! -f @datadir@/sendmail/cf/feature/msp.m4 ]; then
AM='';
fi;
if [ -x @libexecdir@/sendmail ]; then
@libexecdir@/sendmail $AM -bH -O Timeout.hoststatus=1s;
fi;
fi;
# reload (but don't start) sendmail as needed
if [ $SM_delay = 0 ]; then
if [ -x @sysconfdir@/init.d/sendmail ]; then
@sysconfdir@/init.d/sendmail reload-if-running; # up, or down
fi;
fi;
fi;
# Process the sendmail queue
# (background so as to not defer other ip-up work)
# runq &
};
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