Updated by Lubomir Bulej and Mads Kiilerich: it uses /etc/tinc/nets.boot and the VpnMask directive in the config files.
This commit is contained in:
Ivo Timmermans
parent
3a6ffe6895
commit
85e3c1f271
1 changed files with 183 additions and 84 deletions
267
redhat/tinc
267
redhat/tinc
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@ -4,13 +4,13 @@
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#
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# chkconfig: 2345 46 54
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#
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# version: 1.0.4
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# author: Lubomir Bulej <pallas@kadan.cz>
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# Modified for RPM by Mads Kiilerich <mads@kiilerich.com>
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# version: 1.0.8
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# authors: Lubomir Bulej <pallas@kadan.cz>
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# Mads Kiilerich <mads@kiilerich.com>
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#
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# description: this script takes care of starting and setting up of VPNs \
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# provided by tincd daemon. It parses the configuration files \
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# in all VPN directories and sets up the interfaces and routing
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# description: This script parses tinc configuration files for networks given \
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# in /etc/tinc/nets.boot and for each of the networks it sets up \
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# the interface and static routes and starts the tinc daemon.
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#
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# processname: tincd
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@ -31,24 +31,84 @@ TCONF=/etc/tinc
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TPIDS=/var/run
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#DEBUG=-dddd
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NETSFILE=$TCONF/nets.boot
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# Check the daemon
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if [ ! -x $TINCD ]; then
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echo "**tinc: daemon $TINCD does not exist or is not executable!"
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echo "**tinc: $TINCD does not exist or is not executable!" >&2
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exit
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fi
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# Check if ip-route is installed
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if [ ! -f /sbin/ip ]; then
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echo "**tinc: ip-route utilities not installed!"
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echo "**tinc: ip-route utilities not installed!" >&2
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exit
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fi
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# Check the kernel
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if ! ip addr &> /dev/null; then
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echo "**tinc: kernel not configured for use with ip-route!" >&2
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exit
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fi
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# Check the configuration directory
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if [ ! -d $TCONF ]; then
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echo "**tinc: configuration directory ($TCONF) not found!"
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echo "**tinc: configuration directory ($TCONF) not found!" >&2
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exit
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fi
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# Check nets.boot
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if [ ! -f $NETSFILE ]; then
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echo "**tinc: file with list of VPNs to start ($NETSFILE) not found!" >&2
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exit
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fi
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# Load names of networks to be started
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NETS="$(sed -e 's/#.*//; s/[[:space:]]//g; /^$/ d' $NETSFILE)"
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##############################################################################
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# prefix_to_mask Converts prefix length to netmask
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# eg. 17 -> 255.255.128.0
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# $1 ... prefix
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prefix_to_mask () {
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_MSK=""; _len="$1"
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for _dot in "." "." "." " "; do
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if [ ${_len} -ge 8 ]; then
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_fld=8
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else
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_fld="${_len}"
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fi
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_MSK="${_MSK}$((255 & (255 << (8 - _fld))))${_dot}"
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_len=$((_len - _fld))
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done
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echo ${_MSK}
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}
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##############################################################################
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# mask_to_prefix Converts netmask to prefix length
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# eg. 255.255.192.0 -> 18
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# $1 ... netmask
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mask_to_prefix () {
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_LEN=0; _msk="$1"
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for _tmp in 1 2 3 4; do
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_fld=${_msk%%.*}
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_msk=${_msk#*.}
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while [ ${_fld} -ne 0 ]; do
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_fld=$(((_fld << 1) & 255))
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_LEN=$((_LEN + 1))
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done
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done
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echo ${_LEN}
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}
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##############################################################################
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# vpn_load () Loads VPN configuration
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@ -57,56 +117,76 @@ fi
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vpn_load () {
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CFG="$TCONF/$1/tinc.conf"
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[ -f $CFG ] || { echo "**tinc: $CFG does not exist!" >&2; return 1; }
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[ -f $CFG ] || { MSG="$CFG does not exist!"; return 1 }
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# load TINCD config
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DEV=`grep -i -e '^[[:space:]]*TapDevice' $CFG | sed 's/[[:space:]]//g; s/^.*=//g'`
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VPN=`grep -i -e '^[[:space:]]*(MyOwnVPNIP|MyVirtualIP)' -E $CFG | head -1 | sed 's/[[:space:]]//g; s/^.*=//g'`
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DEV="$(grep -i -e '^[[:space:]]*TapDevice' $CFG | sed 's/[[:space:]]//g; s/^.*=//g')"
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VPN="$(grep -i -e '^[[:space:]]*(MyOwnVPNIP|MyVirtualIP)' -E $CFG | sed 's/[[:space:]]//g; s/^.*=//g')"
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IFM="$(grep -i -e '^[[:space:]]*VPNMask' $CFG | sed 's/[[:space:]]//g; s/^.*=//g')"
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# discourage empty and multiple entries
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# TapDevice syntax validation
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[ -z "$DEV" ] && \
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{ echo "**tinc: TapDevice required!" >&2; return 2; }
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echo $DEV | grep -q '^/dev/tap' ||
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{ echo "**tinc: TapDevice should be in form /dev/tapX" >&2; return 2; }
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[ `echo $DEV | wc -l` -gt 1 ] && \
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{ echo "**tinc: multiple TapDevice entries not allowed!" >&2; return 3; }
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{ MSG="TapDevice required!"; return 1 }
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[ $(echo $DEV | wc -l) -gt 1 ] && \
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{ MSG="multiple TapDevice entries not allowed!"; return 1 }
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echo $DEV | grep -q -x -E '/dev/tap[[:digit:]]+' ||
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{ MSG="TapDevice should be in form /dev/tapX!"; return 1 }
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# MyOwnVPNIP/MyVirtualIP syntax validation
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[ -z "$VPN" ] && \
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{ echo "**tinc: MyOwnVPNIP/MyVirtualIP required!" >&2; return 2; }
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[ `echo $VPN | wc -l` -gt 1 ] && \
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{ echo "**tinc: multiple MyOwnVPNIP/MyVirtualIP entries not allowed!" >&2; return 3; }
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echo $VPN | grep -q -x \
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'\([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}/[[:digit:]]\{1,2\}' || \
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{ echo "**tinc: badly formed MyOwnVPNIP/MyVirtualIP address $VPN!"; return 3; }
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{ MSG="MyOwnVPNIP/MyVirtualIP required!"; return 1 }
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[ $(echo $VPN | wc -l) -gt 1 ] && \
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{ MSG="multiple MyOwnVPNIP/MyVirtualIP entries not allowed!"; return 1 }
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echo $VPN | grep -q -x -E \
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'([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}/[[:digit:]]{1,2}' || \
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{ MSG="badly formed MyOwnVPNIP/MyVirtualIP address $VPN!"; return 1 }
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# VPNMask syntax validation
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[ $(echo $IFM | wc -l) -gt 1 ] && \
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{ MSG="multiple VPNMask entries not allowed!"; return 1 }
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# device & IP address extraction
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TAP=${DEV##*/}
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NUM=${TAP#tap}
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ADR=${VPN%%/*}
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# netmask is calculated from MyVirtualIP netmask prefix length, except when
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# VPNMask is specified, in which case it is used instead of default prefix
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# VPNMask not specified
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if [ -z "$IFM" ]; then
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LEN=${VPN##*/}
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MSK=$(prefix_to_mask $LEN)
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# VPNMask is prefix length, convert it to netmask for MSK
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elif echo $IFM | grep -q -x -E '[[:digit:]]{1,2}'; then
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VPN="$ADR/$IFM"
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MSK=$(prefix_to_mask $IFM)
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# VPNMask is netmask, convert it to prefix length for VPN
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elif echo $IFM | grep -q -x -E '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}'; then
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VPN="$ADR/$(mask_to_prefix $IFM)"
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MSK="$IFM"
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else
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MSG="badly formed interface netmask (VPNMask=$IFM)!"
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return 1
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fi
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# network device
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TAP=`echo $DEV | cut -d"/" -f3`
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NUM=`echo $TAP | sed 's/tap//'`
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# IP address, netmask length
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ADR=`echo $VPN | cut -d"/" -f1`
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LEN=`echo $VPN | cut -d"/" -f2`
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# Expand bitlength to netmask
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MSK=""; len=$LEN
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for cnt in 1 1 1 0; do
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if [ $len -ge 8 ]; then
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msk=8
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else
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msk=$len
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fi
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MSK="$MSK$((255 & (255 << (8 - msk))))"
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[ $cnt -ne 0 ] && MSK="$MSK."
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len=$((len-msk))
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done
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# Network & broadcast addresses
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BRD=`ipcalc --broadcast $ADR $MSK | cut -d"=" -f2`
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NET=`ipcalc --network $ADR $MSK | cut -d"=" -f2`
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BRD=$(ipcalc --broadcast $ADR $MSK | cut -d"=" -f2)
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NET=$(ipcalc --network $ADR $MSK | cut -d"=" -f2)
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# MAC address
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MAC=`printf "fe:fd:%0.2x:%0.2x:%0.2x:%0.2x" $(echo $ADR | sed 's/\./ /g')`
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# echo "TAP $TAP NUM $NUM ADR $ADR LEN $LEN MSK $MSK BRD $BRD NET $NET MAC $MAC" >&2
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MAC=$(printf "fe:fd:%0.2x:%0.2x:%0.2x:%0.2x" $(echo $ADR | { IFS=. ; read a b c d; echo $a $b $c $d }))
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# debugging
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# echo >&2
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# echo "VPN $VPN TAP $TAP NUM $NUM MAC $MAC IFM $IFM" >&2
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# echo "ADR $ADR MSK $MSK NET $NET BRD $BRD" >&2
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return 0
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}
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@ -117,8 +197,8 @@ vpn_load () {
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# $1 ... VPN to start
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vpn_start () {
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vpn_load $1 || { echo "**tinc: could not vpn_load $1" >&2; return 1; }
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MSG=""; ERR=""
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vpn_load $1 || return 1
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# create device file
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if [ ! -c $DEV ]; then
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@ -127,24 +207,24 @@ vpn_start () {
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fi
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# load device module
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{ insmod ethertap --name="ethertap$NUM" unit="$NUM" 2>&1 || \
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{ echo "**tinc: cannot insmod ethertap$NUM" >&2; return 2; }
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} | grep -v '^Us'
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ERR="$(insmod ethertap -o "ethertap$NUM" unit="$NUM" 2>&1 1> /dev/null)" ||
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{ MSG="could not insmod ethertap as unit $NUM!"; return 2 }
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# configure the interface
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ip link set $TAP address $MAC
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ip link set $TAP up
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ip addr flush dev $TAP 2>&1 | grep -v -x '^Nothing to flush.'
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ip addr add $VPN brd $BRD dev $TAP
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ERR="$(ip link set $TAP address $MAC 2>&1)" ||
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{ MSG="could not set address for device $TAP!"; return 3 }
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ERR="$(ip link set $TAP up 2>&1)" ||
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{ MSG="could not bring up device $TAP!"; return 3 }
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ERR="$(ip addr add $VPN brd $BRD dev $TAP 2>&1)" ||
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{ MSG="could not set IP address for device $TAP!"; return 3 }
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# start tincd
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$TINCD --net="$1" $DEBUG || \
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{ echo "**tinc: could not start $TINCD" >&2; return 3; }
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{ MSG="could not start daemon for network $1"; return 3 }
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# default interface route
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# ip route add $NET/$LEN dev $TAP
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# setup routes
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# setup custom static routes
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/etc/sysconfig/network-scripts/ifup-routes $TAP
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return 0
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@ -157,12 +237,9 @@ vpn_start () {
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# $1 ... VPN to stop
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vpn_stop () {
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MSG=""; ERR=""
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vpn_load $1 || return 1
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# flush the routing table
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# ip route flush dev $TAP &> /dev/null
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# kill the tincd daemon
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PID="$TPIDS/tinc.$1.pid"
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if [ -f $PID ]; then
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@ -173,14 +250,16 @@ vpn_stop () {
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dly=0
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while [ $dly -le 5 ]; do
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[ -f $PID ] || break
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sleep 1; dly=$((dly+1))
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sleep 1; dly=$((dly + 1))
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done
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fi
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# remove stale PID file
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[ -f $PID ] && rm -f $PID
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fi
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# bring the interface down
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ip addr flush dev $TAP &> /dev/null
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ip link set $TAP down &> /dev/null
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# remove ethertap module
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@ -190,21 +269,44 @@ vpn_stop () {
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} # vpn_stop
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# Check if there is anything to start
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if [ ! -z "$1" -a "$1" != "status" -a -z "$NETS" ]; then
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echo "**tinc: no networks found in $NETSFILE!" >&2
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exit
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fi
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# See how we were called.
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case "$1" in
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start)
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for vpn in `ls -1 $TCONF`; do
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echo -n "Bringing up VPN $vpn: "
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vpn_start $vpn && action "" /bin/true
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for vpn in $NETS; do
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echo -n "Bringing up TINC network $vpn: "
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vpn_start $vpn && \
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success "startup of network $vpn" || \
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failure "startup of network $vpn"
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echo
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if [ ! -z "$MSG" ]; then
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[ ! -z "$ERR" ] && echo "$ERR" >&2
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echo "**tinc: $MSG" >&2
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fi
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done
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touch /var/lock/subsys/tinc
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;;
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stop)
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for vpn in `ls -1 $TCONF`; do
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echo -n "Shutting down VPN $vpn: "
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vpn_stop $vpn && action "" /bin/true
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for vpn in $NETS; do
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echo -n "Shutting down TINC network $vpn: "
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vpn_stop $vpn && \
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success "shutdown of network $vpn" || \
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failure "shutdown of network $vpn"
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echo
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if [ ! -z "$MSG" ]; then
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[ ! -z "$ERR" ] && echo "$ERR" >&2
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echo "**tinc: $MSG" >&2
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fi
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done
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rm -f /var/lock/subsys/tinc
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@ -212,15 +314,12 @@ case "$1" in
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status)
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echo -n "Configured VPNs: "
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for vpn in `ls -1 $TCONF`; do
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for vpn in $NETS; do
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PID="$TPIDS/tinc.$vpn.pid"
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echo -n "$vpn:"
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if [ -f $PID -a `ps ax | grep "^ *$(cat $PID)" | wc -l` -eq 1 ]
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then
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echo -n "OK "
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else
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echo -n "DEAD "
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fi
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[ -f $PID ] && PID="$(cat $PID)" || PID="-dead-"
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ps ax | grep "^[[:space:]]*$PID" && STS="OK" || STS="DEAD"
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echo -n "$vpn:$STS "
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done
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echo
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;;
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