forked from extern/shorewall_code
283 lines
6.1 KiB
Plaintext
283 lines
6.1 KiB
Plaintext
####################################################################################
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# Functions imported from /usr/share/shorewall/prog.functions
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####################################################################################
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#
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# Clear Proxy Arp
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#
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delete_proxyarp() {
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if [ -f ${VARDIR}/proxyarp ]; then
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while read address interface external haveroute; do
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qt arp -i $external -d $address pub
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[ -z "${haveroute}${NOROUTES}" ] && qt $IP -4 route del $address dev $interface
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f=/proc/sys/net/ipv4/conf/$interface/proxy_arp
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[ -f $f ] && echo 0 > $f
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done < ${VARDIR}/proxyarp
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fi
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rm -f ${VARDIR}/proxyarp
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}
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#
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# Remove all Shorewall-added rules
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#
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clear_firewall() {
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stop_firewall
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setpolicy INPUT ACCEPT
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setpolicy FORWARD ACCEPT
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setpolicy OUTPUT ACCEPT
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run_iptables -F
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echo 1 > /proc/sys/net/ipv4/ip_forward
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if [ -n "$DISABLE_IPV6" ]; then
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if qt mywhich ip6tables; then
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ip6tables -P INPUT ACCEPT 2> /dev/null
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ip6tables -P OUTPUT ACCEPT 2> /dev/null
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ip6tables -P FORWARD ACCEPT 2> /dev/null
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fi
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fi
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run_clear_exit
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set_state "Cleared"
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logger -p kern.info "$PRODUCT Cleared"
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}
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#
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# Issue a message and stop/restore the firewall
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#
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fatal_error()
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{
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echo " ERROR: $@" >&2
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if [ $LOG_VERBOSE -gt 1 ]; then
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timestamp="$(date +'%_b %d %T') "
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echo "${timestamp} ERROR: $@" >> $STARTUP_LOG
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fi
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stop_firewall
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[ -n "$TEMPFILE" ] && rm -f $TEMPFILE
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exit 2
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}
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#
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# Issue a message and stop
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#
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startup_error() # $* = Error Message
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{
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echo " ERROR: $@: Firewall state not changed" >&2
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case $COMMAND in
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start)
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logger -p kern.err "ERROR:$PRODUCT start failed:Firewall state not changed"
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;;
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restart)
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logger -p kern.err "ERROR:$PRODUCT restart failed:Firewall state not changed"
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;;
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restore)
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logger -p kern.err "ERROR:$PRODUCT restore failed:Firewall state not changed"
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;;
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esac
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if [ $LOG_VERBOSE -gt 1 ]; then
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timestamp="$(date +'%_b %d %T') "
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case $COMMAND in
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start)
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echo "${timestamp} ERROR:$PRODUCT start failed:Firewall state not changed" >> $STARTUP_LOG
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;;
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restart)
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echo "${timestamp} ERROR:$PRODUCT restart failed:Firewall state not changed" >> $STARTUP_LOG
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;;
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restore)
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echo "${timestamp} ERROR:$PRODUCT restore failed:Firewall state not changed" >> $STARTUP_LOG
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;;
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esac
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fi
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kill $$
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exit 2
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}
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#
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# Run iptables and if an error occurs, stop/restore the firewall
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#
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run_iptables()
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{
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local status
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while [ 1 ]; do
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$IPTABLES $@
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status=$?
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[ $status -ne 4 ] && break
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done
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if [ $status -ne 0 ]; then
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error_message "ERROR: Command \"$IPTABLES $@\" Failed"
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stop_firewall
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exit 2
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fi
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}
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#
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# Run iptables retrying exit status 4
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#
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do_iptables()
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{
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local status
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while [ 1 ]; do
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$IPTABLES $@
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status=$?
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[ $status -ne 4 ] && return $status;
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done
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}
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#
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# Run iptables and if an error occurs, stop/restore the firewall
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#
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run_ip()
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{
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if ! $IP -4 $@; then
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error_message "ERROR: Command \"$IP -4 $@\" Failed"
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stop_firewall
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exit 2
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fi
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}
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#
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# Run tc and if an error occurs, stop/restore the firewall
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#
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run_tc() {
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if ! $TC $@ ; then
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error_message "ERROR: Command \"$TC $@\" Failed"
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stop_firewall
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exit 2
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fi
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}
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#
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# Restore the rules generated by 'drop','reject','logdrop', etc.
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#
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restore_dynamic_rules() {
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if [ -f ${VARDIR}/save ]; then
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progress_message2 "Setting up dynamic rules..."
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rangematch='source IP range'
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while read target ignore1 ignore2 address ignore3 rest; do
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case $target in
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DROP|reject|logdrop|logreject)
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case $rest in
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$rangematch*)
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run_iptables -A dynamic -m iprange --src-range ${rest#source IP range} -j $target
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;;
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*)
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if [ -z "$rest" ]; then
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run_iptables -A dynamic -s $address -j $target
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else
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error_message "WARNING: Unable to restore dynamic rule \"$target $ignore1 $ignore2 $address $ignore3 $rest\""
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fi
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;;
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esac
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;;
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esac
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done < ${VARDIR}/save
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fi
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}
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#
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# Get a list of all configured broadcast addresses on the system
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#
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get_all_bcasts()
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{
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$IP -f inet addr show 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u
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}
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#
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# Run the .iptables_restore_input as a set of discrete iptables commands
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#
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debug_restore_input() {
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local first second rest table chain
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#
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# Clear the ruleset
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#
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qt1 $IPTABLES -t mangle -F
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qt1 $IPTABLES -t mangle -X
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for chain in PREROUTING INPUT FORWARD POSTROUTING; do
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qt1 $IPTABLES -t mangle -P $chain ACCEPT
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done
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qt1 $IPTABLES -t raw -F
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qt1 $IPTABLES -t raw -X
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for chain in PREROUTING OUTPUT; do
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qt1 $IPTABLES -t raw -P $chain ACCEPT
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done
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run_iptables -t nat -F
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run_iptables -t nat -X
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for chain in PREROUTING POSTROUTING OUTPUT; do
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qt1 $IPTABLES -t nat -P $chain ACCEPT
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done
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qt1 $IPTABLES -t filter -F
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qt1 $IPTABLES -t filter -X
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for chain in INPUT FORWARD OUTPUT; do
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qt1 $IPTABLES -t filter -P $chain -P ACCEPT
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done
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while read first second rest; do
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case $first in
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-*)
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#
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# We can't call run_iptables() here because the rules may contain quoted strings
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#
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eval $IPTABLES -t $table $first $second $rest
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if [ $? -ne 0 ]; then
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error_message "ERROR: Command \"$IPTABLES $first $second $rest\" Failed"
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stop_firewall
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exit 2
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fi
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;;
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:*)
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chain=${first#:}
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if [ "x$second" = x- ]; then
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do_iptables -t $table -N $chain
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else
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do_iptables -t $table -P $chain $second
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fi
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if [ $? -ne 0 ]; then
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error_message "ERROR: Command \"$IPTABLES $first $second $rest\" Failed"
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stop_firewall
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exit 2
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fi
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;;
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#
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# This grotesque hack with the table names works around a bug/feature with ash
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#
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'*'raw)
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table=raw
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;;
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'*'mangle)
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table=mangle
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;;
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'*'nat)
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table=nat
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;;
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'*'filter)
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table=filter
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;;
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esac
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done
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}
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####################################################################################
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# End of functions imported from /usr/share/shorewall/prog.functions
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####################################################################################
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