#!/bin/sh

set -e

[ "$1" = "configure" ] || exit 0
[ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx

# Load CARNet Tools
. /usr/share/carnet-tools/functions.sh
# Load Debconf
. /usr/share/debconf/confmodule

db_get postfix-cn/rbl || true
rbl="$RET"

# Tue, 19 Dec 2006 10:31:01 +0100
# relays.ordb.org se gasi 2006-12-31
if echo $rbl | grep -q relays.ordb.org; then
  rbl="`echo $rbl | sed 's/relays.ordb.org, //g'`"
  # za svaki slucaj, ako je na kraju
  rbl="`echo $rbl | sed 's/relays.ordb.org//g'`"
  db_set postfix-cn/rbl "$rbl" || true
fi

# Thu, 21 Dec 2006 09:03:50 +0100
# opm.blitzed.org je ugasen 2006-05
if echo $rbl | grep -q opm.blitzed.org; then
  rbl="`echo $rbl | sed 's/opm.blitzed.org, //g'`"
  # za svaki slucaj, ako je na kraju
  rbl="`echo $rbl | sed 's/opm.blitzed.org//g'`"
  db_set postfix-cn/rbl "$rbl" || true
fi

db_get postfix-cn/matchgecos || true
matchgecos="$RET"

hostname="`hostname`"
fqdn="`hostname --fqdn`"
domain="`dnsdomainname`"
mailname="`cat /etc/mailname 2> /dev/null || hostname --fqdn`"
cp_get_netaddr || true
netaddr="$RET"

# ako ne postoje konfiguracijske datoteke, napravi ih
[ -f /etc/postfix/master.cf ] || touch /etc/postfix/master.cf
[ -f /etc/postfix/main.cf ] || touch /etc/postfix/main.cf

# spremi pocetnu verziju
cp -pf /etc/postfix/master.cf /etc/postfix/master.cf.dpkg-tmp.$$
cp -pf /etc/postfix/main.cf /etc/postfix/main.cf.dpkg-tmp.$$

# srediti master.cf za TLS
if [ -f /etc/postfix/master.cf ]; then
  cp_check_and_sed '^#tlsmgr' \
                   's/^#tlsmgr/tlsmgr/g' \
                   /etc/postfix/master.cf || true

  cp_check_and_sed '^#smtps' \
                   's/^#smtps/smtps/g' \
                   /etc/postfix/master.cf || true
fi

# ovo manje/vise uzima kao default, ali u slucaju da je multihomed stroj,
# i eventualno je sprckan, mozda nesto nece raditi kako spada pa cemo konfigurirati
postconf -e myhostname="$fqdn"
postconf -e mydomain="$domain"
postconf -e myorigin="$mailname"

# zbog problema sa squirrelmailom
postconf -e append_dot_mydomain="yes"
postconf -e append_at_myorigin="yes"

# dodaj 127.0.0.0/8 i netaddr
mynetworks="`postconf -h mynetworks`"
for i in "127.0.0.0/8" "$netaddr"; do
  if ! echo $mynetworks | grep -q $i; then
   mynetworks="$mynetworks, $i"
  fi
done
postconf -e mynetworks="$mynetworks"

# obrisati $mydomain, ako je upgrade sa starije verzije
# te srediti mydestination
if dpkg --compare-versions "$2" lt 2.3.8-2; then
  mydestination="`postconf -h mydestination`"
  if echo $mydestination | grep -q ", \$mydomain"; then
    mydestination="`echo $mydestination | sed 's/, \$mydomain//g'`"
  fi
  if ! echo $mydestination | grep -q "localhost.\$mydomain"; then
    mydestination="$mydestination, localhost.\$mydomain"
  fi
  if ! echo $mydestination | grep -q "\$myhostname"; then
    mydestination="\$myhostname, $mydestination"
  fi
  postconf -e mydestination="$mydestination"
fi

# default je: $myhostname, localhost.$mydomain, localhost
# treba dodati jos ", $mydomain", ako je host mx
cp_get_mx_domain || true
mx_domain="$RET"
if [ "$mx_domain" != "$fqdn" ]; then
  mydestination="`postconf -h mydestination`"
  if ! echo $mydestination | grep -q ", \$mydomain"; then
    postconf -e mydestination="$mydestination, \$mydomain"
  fi
  postconf -e relay_domains="\$mydestination"
  if [ "$mx_domain" != "$domain" ]; then
    if dpkg --compare-versions "$2" lt 2.1.5-8; then
      cp_echo "CN: This host is MX for more than one domain! postfix-cn package will"
      cp_echo "CN: only set up $mx_domain, you HAVE TO add the other domains manually"
      cp_echo "CN: to mydestination variable in /etc/postfix/main.cf, if you haven't"
      cp_echo "CN: done that already or you may lose mail."
    fi
  fi
fi

# sredi $alias_maps
if [ "$matchgecos" = "true" ]; then
  aliasmaps="hash:/etc/aliases hash:/var/lib/postfix-cn/aliases_gecos"
elif [ "$matchgecos" = "false" ]; then
  aliasmaps="hash:/etc/aliases"
  alias_maps="`postconf -h alias_maps | \
               sed -e 's#hash:/var/lib/postfix-cn/aliases_gecos,*##g' -e 's/,*[[:space:]]*$//g'`"
  postconf -e alias_maps="$alias_maps"
fi

for i in $aliasmaps; do
  alias_maps="`postconf -h alias_maps`"
  if ! echo $alias_maps | grep -q "$i"; then
    postconf -e alias_maps="$alias_maps, $i"
  fi
done

postconf -e alias_database="hash:/etc/aliases"
postconf -e local_recipient_maps="proxy:unix:passwd.byname \$alias_maps"

# jos malo
postconf -e recipient_delimiter="+"
postconf -e smtpd_helo_required="yes"
postconf -e smtpd_helo_restrictions="permit_mynetworks"
postconf -e in_flow_delay="2s"
postconf -e initial_destination_concurrency="10"
postconf -e default_destination_concurrency_limit="30"
postconf -e smtpd_recipient_limit="400"
postconf -e hash_queue_depth="3"

if dpkg --compare-versions "$2" lt 2.1.5-6; then
  postconf -e bounce_queue_lifetime="5d"
  postconf -e maximal_queue_lifetime="5d"
fi

# ako netko zeli maknuti maskiranje, da mu ga nova verzija ne doda
if dpkg --compare-versions "$2" lt 2.1.5-2; then
  postconf -e masquerade_domains="\$mydomain"
fi

# sredi smtpd_recipient_restrictions
smtpd_recipient_restrictions="reject_invalid_hostname, \
                              reject_unknown_sender_domain, \
                              reject_unknown_recipient_domain, \
                              reject_unauth_pipelining, \
			      permit_sasl_authenticated, \
			      permit_mynetworks, \
			      reject_unauth_destination"

# dodaj samo rbl-ove iz debconfa
if [ "$rbl" ]; then
  for i in `echo $rbl | tr -d ,`; do
    smtpd_recipient_restrictions="$smtpd_recipient_restrictions, reject_rbl_client $i"
  done
fi

# dodaj permit na kraj
smtpd_recipient_restrictions="$smtpd_recipient_restrictions, permit"
postconf -e smtpd_recipient_restrictions="$smtpd_recipient_restrictions"

# SASL stuff
postconf -e smtpd_sasl_auth_enable="yes"
postconf -e smtpd_sasl_security_options="noanonymous"
postconf -e smtpd_sasl_local_domain="\$myhostname"
postconf -e broken_sasl_auth_clients="yes"

[ -d /etc/postfix/sasl/ ] || mkdir -p /etc/postfix/sasl/
if [ ! -f /etc/postfix/sasl/smtpd.conf ]; then
  cat - > /etc/postfix/sasl/smtpd.conf <<EOF
pwcheck_method: saslauthd
mech_list: plain login
EOF
  restart_postfix="yes"
fi

if [ -f /etc/default/saslauthd ]; then
  cp_check_and_sed "^START=no" \
                   "s/^START=no/START=yes/g" \
		   /etc/default/saslauthd && restart_saslauthd="yes"

  cp_check_and_sed "^#[[:blank:]]*START=" \
                   "s/^#[[:blank:]]*START=.*$/START=yes/g" \
		   /etc/default/saslauthd && restart_saslauthd="yes"

  if ! grep -q "^START.*yes" /etc/default/saslauthd; then
    echo "START=yes" >> /etc/default/saslauthd
    restart_saslauthd="yes"
  fi

  if ! grep -q "^OPTIONS.*/var/spool/postfix/var/run/saslauthd" /etc/default/saslauthd; then
    echo "OPTIONS=\"-c -m /var/spool/postfix/var/run/saslauthd\"" >> /etc/default/saslauthd
    restart_saslauthd="yes"
  fi

  if ! grep -q "&& ln -s" /etc/default/saslauthd; then
    echo "[ ! -L /var/run/saslauthd -a -d /var/spool/postfix/var/run/saslauthd -a ! -d /var/run/saslauthd ] && ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd || true" >> /etc/default/saslauthd
    restart_saslauthd="yes"
  fi

  if [ ! -L /var/run/saslauthd ]; then
    mkdir -p /var/spool/postfix/var/run/
    if [ -d /var/run/saslauthd -a ! -d /var/spool/postfix/var/run/saslauthd ]; then
      mv /var/run/saslauthd /var/spool/postfix/var/run/
    elif [ -d /var/run/saslauthd -a -d /var/spool/postfix/var/run/saslauthd ]; then
      rm -rf /var/run/saslauthd/
    fi
    # XXX jos kad bi ln -s u /var/run/ radio (bootclean.sh)
    if [ -d /var/spool/postfix/var/run/saslauthd -a ! -d /var/run/saslauthd ]; then
      ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd
    fi
    restart_saslauthd="yes"
  fi

  if [ ! -d /var/spool/postfix/var/run/saslauthd ]; then
    mkdir -p /var/spool/postfix/var/run/saslauthd
    restart_saslauthd="yes"
  fi

  if ! dpkg-statoverride --list /var/spool/postfix/var/run/saslauthd > /dev/null; then
    dpkg-statoverride --update --add root sasl 710 /var/spool/postfix/var/run/saslauthd
  fi
fi

# restart saslauthd
if [ "$restart_saslauthd" = "yes" ]; then
  if [ -x /usr/sbin/invoke-rc.d ]; then
    [ -x /etc/init.d/saslauthd ] && invoke-rc.d saslauthd restart
  else
    [ -x /etc/init.d/saslauthd ] && /etc/init.d/saslauthd restart
  fi
fi

# TLS stuff
postconf -e smtp_tls_security_level="may"
postconf -e smtp_tls_session_cache_database="sdbm:/var/lib/postfix/smtp_scache"
postconf -e smtp_tls_session_cache_timeout="3600s"
postconf -e smtpd_tls_security_level="may"
postconf -e smtpd_tls_session_cache_database="sdbm:/var/lib/postfix/smtpd_scache"
postconf -e smtpd_tls_session_cache_timeout="3600s"
postconf -e tls_random_source="dev:/dev/urandom"
postconf -e smtpd_tls_exclude_ciphers="aNULL"
postconf -e smtpd_tls_mandatory_exclude_ciphers="aNULL"

# nije potrebno generiranje certifikata jer postfix koristi paket ssl-cert
# ako je postavljen snakeoil certifikat za smtpd_tls_* postavi isti za smtp_tls_*
smtpd_tls_cert_file="`postconf -h smtpd_tls_cert_file`"
if [ "$smtpd_tls_cert_file" = "/etc/ssl/certs/ssl-cert-snakeoil.pem" ]; then
  postconf -e smtp_tls_cert_file="/etc/ssl/certs/ssl-cert-snakeoil.pem"
  postconf -e smtp_tls_key_file="/etc/ssl/private/ssl-cert-snakeoil.key"
fi

# ako je prazan, postavi na defaultni iz paketa ssl-cert
smtpd_tls_cert_file="`postconf -h smtpd_tls_cert_file`"
if [ -z "$smtpd_tls_cert_file" ]; then
  postconf -e smtpd_tls_cert_file="/etc/ssl/certs/ssl-cert-snakeoil.pem"
  postconf -e smtpd_tls_key_file="/etc/ssl/private/ssl-cert-snakeoil.key"
fi
smtp_tls_cert_file="`postconf -h smtp_tls_cert_file`"
if [ -z "$smtp_tls_cert_file" ]; then
  postconf -e smtp_tls_cert_file="/etc/ssl/certs/ssl-cert-snakeoil.pem"
  postconf -e smtp_tls_key_file="/etc/ssl/private/ssl-cert-snakeoil.key"
fi

# prije bilo u /etc/postfix/, od verzije 2.1.5-2 je u /var/spool/postfix
[ -f /etc/postfix/smtp_scache.dir ] && rm -f /etc/postfix/smtp_scache.dir
[ -f /etc/postfix/smtp_scache.pag ] && rm -f /etc/postfix/smtp_scache.pag
[ -f /etc/postfix/smtpd_scache.dir ] && rm -f /etc/postfix/smtpd_scache.dir
[ -f /etc/postfix/smtpd_scache.pag ] && rm -f /etc/postfix/smtpd_scache.pag
# prije bilo u /var/spool/postfix/, od verzije 2.5.5 je u /var/lib/postfix
[ -f /var/spool/postfix/smtp_scache.dir ] && rm -f /var/spool/postfix/smtp_scache.dir
[ -f /var/spool/postfix/smtp_scache.pag ] && rm -f /var/spool/postfix/smtp_scache.pag
[ -f /var/spool/postfix/smtpd_scache.dir ] && rm -f /var/spool/postfix/smtpd_scache.dir
[ -f /var/spool/postfix/smtpd_scache.pag ] && rm -f /var/spool/postfix/smtpd_scache.pag

# debconf stop
db_go || true
db_stop || true

# ako postoji amavis, sredi
if [ -x /usr/share/amavisd-cn/postfixize.sh ]; then
  /usr/share/amavisd-cn/postfixize.sh
fi

# provjeri da li postoji sendmail-base
if ! dpkg -l sendmail-base | grep -q '^.n'; then
  cp_echo ""
  cp_echo "CN: Package sendmail-base detected."
  cp_echo "CN: Please, purge this package with command:"
  cp_echo "CN: # dpkg --purge sendmail-base"
  cp_echo ""
fi

# sendmailov /etc/mail/access
if [ -f /etc/mail/access -a /etc/mail/access.db ]; then
  cp_echo ""
  cp_echo "CN: Sendmail's access file (/etc/mail/access) detected."
  cp_echo "CN: Please, upgrade your's /etc/postfix/access."
  cp_echo "CN: http://www.postfix.org/SMTPD_ACCESS_README.html"
  cp_echo ""
fi

if ! id postfix | grep -q sasl; then
  adduser postfix sasl > /dev/null
  restart_postfix="yes"
fi

# ako ima razlika, backupiraj stari, ako ne, obrisi privremeni backup
if ! cmp -s /etc/postfix/master.cf /etc/postfix/master.cf.dpkg-tmp.$$; then
  cp_echo "CN: Backing up old version of /etc/postfix/master.cf in /var/backups/..."
  cp_backup_conffile /etc/postfix/master.cf.dpkg-tmp.$$ master.cf
  restart_postfix="yes"
fi
rm -f /etc/postfix/master.cf.dpkg-tmp.$$

if ! cmp -s /etc/postfix/main.cf /etc/postfix/main.cf.dpkg-tmp.$$; then
  cp_echo "CN: Backing up old version of /etc/postfix/main.cf in /var/backups/..."
  cp_backup_conffile /etc/postfix/main.cf.dpkg-tmp.$$ main.cf
  restart_postfix="yes"
fi
rm -f /etc/postfix/main.cf.dpkg-tmp.$$

if ! grep -q "retry     unix  -       -       -       -       -       error" /etc/postfix/master.cf; then
  echo "CN: Please, add this line in /etc/postfix/master.cf and restart Postfix."
  echo "retry     unix  -       -       -       -       -       error"
  echo
fi

# kreiraj aliases_gecos
if [ -x /usr/share/postfix-cn/make-aliases-gecos.sh ]; then
  if [ "$matchgecos" = "true" ]; then
    echo "CN: Creating GECOS alias map..."
    /usr/share/postfix-cn/make-aliases-gecos.sh
  fi
fi

# restart 
if [ "$restart_postfix" = "yes" ]; then
  if [ -x /usr/sbin/invoke-rc.d ]; then
    [ -x /etc/init.d/postfix ] && invoke-rc.d postfix restart
  else
    [ -x /etc/init.d/postfix ] && /etc/init.d/postfix restart
  fi
fi
cp_mail postfix-cn