docker-mailserver/target/scripts/startup/setup.d/networking.sh

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#!/bin/bash
function _setup_mailname
{
_log 'debug' "Setting up mailname and creating '/etc/mailname'"
echo "${DOMAINNAME}" >/etc/mailname
}
function _setup_docker_permit
{
_log 'debug' 'Setting up PERMIT_DOCKER option'
local CONTAINER_IP CONTAINER_NETWORK
unset CONTAINER_NETWORKS
declare -a CONTAINER_NETWORKS
CONTAINER_IP=$(ip addr show "${NETWORK_INTERFACE}" | \
grep 'inet ' | sed 's|[^0-9\.\/]*||g' | cut -d '/' -f 1)
CONTAINER_NETWORK=$(echo "${CONTAINER_IP}" | cut -d '.' -f1-2).0.0
if [[ -z ${CONTAINER_IP} ]]
then
_log 'error' 'Detecting the container IP address failed'
_dms_panic__misconfigured 'NETWORK_INTERFACE' 'Network Setup [docker_permit]'
fi
while read -r IP
do
CONTAINER_NETWORKS+=("${IP}")
done < <(ip -o -4 addr show type veth | grep -E -o '[0-9\.]+/[0-9]+')
function __clear_postfix_mynetworks
{
_log 'trace' "Clearing Postfix's 'mynetworks'"
postconf "mynetworks ="
}
function __add_to_postfix_mynetworks
{
local NETWORK_TYPE=$1
local NETWORK=$2
_log 'trace' "Adding ${NETWORK_TYPE} (${NETWORK}) to Postfix 'main.cf:mynetworks'"
_adjust_mtime_for_postfix_maincf
postconf "$(postconf | grep '^mynetworks =') ${NETWORK}"
[[ ${ENABLE_OPENDMARC} -eq 1 ]] && echo "${NETWORK}" >>/etc/opendmarc/ignore.hosts
[[ ${ENABLE_OPENDKIM} -eq 1 ]] && echo "${NETWORK}" >>/etc/opendkim/TrustedHosts
}
case "${PERMIT_DOCKER}" in
( 'none' )
__clear_postfix_mynetworks
;;
( 'connected-networks' )
for CONTAINER_NETWORK in "${CONTAINER_NETWORKS[@]}"
do
CONTAINER_NETWORK=$(_sanitize_ipv4_to_subnet_cidr "${CONTAINER_NETWORK}")
__add_to_postfix_mynetworks 'Docker Network' "${CONTAINER_NETWORK}"
done
;;
( 'container' )
__add_to_postfix_mynetworks 'Container IP address' "${CONTAINER_IP}/32"
;;
( 'host' )
__add_to_postfix_mynetworks 'Host Network' "${CONTAINER_NETWORK}/16"
;;
( 'network' )
__add_to_postfix_mynetworks 'Docker IPv4 Subnet' '172.16.0.0/12'
;;
( * )
_log 'warn' "Invalid value for PERMIT_DOCKER: '${PERMIT_DOCKER}'"
__clear_postfix_mynetworks
;;
esac
}