X-Git-Url: https://git.grml.org/?a=blobdiff_plain;f=grml-terminalserver;h=458b203c1a899b6909a2ce058fd64a6f979c0959;hb=46d197e4807cc8336617c6f65fb776adc77ac5ae;hp=61c446173736573a1d0ae12e82006c63d77cad9f;hpb=a1989990540702f98cc5ab7f1fc693fea2d74a0f;p=grml-terminalserver.git diff --git a/grml-terminalserver b/grml-terminalserver index 61c4461..458b203 100755 --- a/grml-terminalserver +++ b/grml-terminalserver @@ -20,6 +20,7 @@ ### __VARIABLES ### +FORCE_='false' verbose_=0 # this file holds all variable definitions @@ -53,10 +54,11 @@ SERVICES: dhcp Dhcp daemon nfs All necessary nfs daemons <> ALL services - + OPTIONS: -v verbose (show what is going on, v++) -h this help text + -f Force EOT } @@ -75,7 +77,12 @@ function createDhcpConf execute "mv -fb \"$DHCPD_CONFIG_FILE_\" \"$DHCPD_CONFIG_FILE_.old\"" eprint &>/dev/null execute "source $TEMPLATE_CONFIG_DIR_/dhcpd_config" die else - warn "Not updating user edited configfile $DHCPD_CONFIG_FILE_" + if [[ $FORCE_ == "true" ]]; then + execute "mv -fb \"$DHCPD_CONFIG_FILE_\" \"$DHCPD_CONFIG_FILE_.old\"" eprint &>/dev/null + execute "source $TEMPLATE_CONFIG_DIR_/dhcpd_config" die + else + warn "Not updating user edited configfile $DHCPD_CONFIG_FILE_, user -f to override" + fi fi else execute "source $TEMPLATE_CONFIG_DIR_/dhcpd_config" die @@ -88,7 +95,11 @@ function removeDhcpConf if grep $CONFIG_PATTERN_ $DHCPD_CONFIG_FILE_ &>/dev/null; then rm -f "$DHCPD_CONFIG_FILE_" else - warn "Not deleting user edited configfile $DHCPD_CONFIG_FILE_" + if [[ $FORCE_ == "true" ]]; then + rm -f "$DHCPD_CONFIG_FILE_" + else + warn "Not deleting user edited configfile $DHCPD_CONFIG_FILE_, user -f to override" + fi fi fi } @@ -101,14 +112,16 @@ function stopDhcp rm -f /var/lib/dhcp3/dhcpd.leases* 2>/dev/null #FIXME touch /var/lib/dhcp3/dhcpd.leases } + function startDhcp { local conf_file_="$DHCPD_CONFIG_FILE_" - + test -f $DHCPD_BIN_ || die "could not find dhcpd \"$DHCPD_BIN_\"" start-stop-daemon --start --quiet --pidfile "$DHCPD_PID_" \ --exec "$DHCPD_BIN_" -- -cf "$conf_file_" -q "$INTERFACE_" || warn "problems starting dhcpd" } + function runDhcp { isExistent "$DHCPD_CONFIG_FILE_" || \ @@ -118,6 +131,58 @@ function runDhcp sleep 1 startDhcp } + +# make sure tcp/113 is rejected +function runIptables +{ + if [ -x /sbin/iptables ] ; then + # something keeps answering all tftp requests with auth requests (SYN + # packets to the client tcp/113). Since the PXE client doesn't answer with + # RST, the auth query has to wait until it times out. Forbidding the + # terminalserver to send out packets to tcp/113 via iptables _greatly_ + # speeds up the process. But of course the real fix would be to have grml + # stop sending out auth queries to tftp clients. according to netstat, it + # is in.tftpd itself sending out the auth queries. + # Thanks to Marc Haber and Wolfgang Karall for noticing and current fix. + if iptables -L | grep -q '^REJECT.*tcp dpt:auth reject-with tcp-reset' ; then + echo "Rule for tcp/113 already present, nothing to be done." + else + echo "Rejecting tcp/113 via iptables to speed up booting via PXE, running:" + echo -n '* iptables -A OUTPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset ... ' + iptables -A OUTPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset && echo done || echo failed + fi + # deactivate Multicast-DNS + if iptables -L | grep -q '^REJECT.*dpt:mdns reject-with icmp-port-unreachable' ; then + echo "Rule for udp/5353 already present, nothing to be done." + else + echo "Rejecting udp/5353 via iptables for deactivating Multicast-DNS, running:" + echo -n '* iptables -A OUTPUT -p udp -d 224.0.0.0/8 --dport 5353 -j REJECT ... ' + iptables -A OUTPUT -p udp -d 224.0.0.0/8 --dport 5353 -j REJECT && echo done || echo failed + fi + if [ "$NAT_INTERFACE_" != "none" ]; then + local nat_source_ip_=`netGetIp "$NAT_INTERFACE_" warn` + + if iptables -t nat -vnL POSTROUTING | grep -q "SNAT.*${NAT_INTERFACE_}.*to:${nat_source_ip_}" ; then + echo "Rule for SNAT already present, nothing to be done." + else + echo "Setting up SNAT for terminalserver clients on ${NAT_INTERFACE_}:" + echo "* iptables -t nat -F POSTROUTING" + echo -n "* iptables -t nat -A POSTROUTING -o $NAT_INTERFACE_ -j SNAT --to-source $nat_source_ip_ ... " + { iptables -t nat -F POSTROUTING && \ + iptables -t nat -A POSTROUTING -o "$NAT_INTERFACE_" -j SNAT --to-source "$nat_source_ip_" ; } && \ + echo done || echo failed + fi + if [ `cat /proc/sys/net/ipv4/ip_forward` -eq 1 ]; then + echo "IP-Forwarding already enabled, nothing to be done." + else + echo -n "Enabling IP-Forwarding: " + echo 1 > /proc/sys/net/ipv4/ip_forward && echo done || echo failed + fi + fi + else + warn "iptables executable not avilable" + fi +} # }}} # TFTP SERVICE {{{ @@ -128,7 +193,7 @@ function removeTftpConf function createTftpConf { removeTftpConf - + execute "mkdir $TFTPD_DATA_DIR_/pxelinux.cfg" die execute "install -m 644 /usr/lib/syslinux/pxelinux.0 $TFTPD_DATA_DIR_" die execute "install -m 644 $PATH_/minirt26.gz $TFTPD_DATA_DIR_" die @@ -192,11 +257,6 @@ function stopNfs } # }}} -function allreadyConfigured -{ - isExistent "$CONF_FILE_" dprint || return 1 - return 0 -} function createConfig { @@ -211,16 +271,17 @@ function createConfig function actionStart { createConfig - - echo -n "Starting tftpd..." - runTftp - echo "done" - echo -n "Starting dhcpd..." - runDhcp - echo "done" - echo -n "Starting nfs..." - startNfs - echo "done" + + echo -n "Starting tftpd: " + runTftp && echo done || echo failed + + echo -n "Starting dhcpd: " + runDhcp && echo done || echo failed + + runIptables + + echo "Finally starting nfs services..." + startNfs && echo "Sucessfully finished startup of grml-terminalserver." || echo 'Startup of grml-terminalserver-config failed!' } function actionStop @@ -284,8 +345,9 @@ function serviceStop ### __MAIN ### -while getopts "i:hv" opt; do +while getopts "fi:hv" opt; do case "$opt" in + f) FORCE_='true' ;; h) printUsage; exit ;; v) let verbose_=$verbose_+1 ;; ?) printUsage; exit 64 ;; @@ -319,7 +381,7 @@ PXE_BOOT_MSG_=\"$PXE_BOOT_MSG_\" PXE_BOOT_LOGO_=\"$PXE_BOOT_LOGO_\"" die "False configuration, please update $CONFIG_" fi - + case "$1" in clean) actionClean; exit 0 ;; esac @@ -333,7 +395,7 @@ while true; do "grml-terminalserver-config returned an error, do you want to quit now?" 5 75 && exit 1 else break - fi + fi done source $CONF_FILE_