101 lines
2.5 KiB
Text
101 lines
2.5 KiB
Text
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#!/bin/bash
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######################################################################
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#
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# hexroute - Convert human readable routes to dhcpd static route info
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# for Windows(r) clients
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#
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# Copyright (c) 2005-2015 Karl McMurdo
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#
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# Freely distributable, but please keep header intact
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#
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# Update: May 10, 2007 Change Max Quad to 255
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#
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######################################################################
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function split_ipaddr() {
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[ ${1:-X} = X -o "${1}" != ${1//[^.0-9]/} -o ${1:-X} = X \
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-o "${1//[0-9]/}" != "..." ] && return 1
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local rval=0
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local t
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local T[1]
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local T[2]
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local T[3]
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local T[4]
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T[1]=${1%%.*}
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T[2]=${1#*.}
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T[2]=${T[2]%%.*}
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T[3]=${1#*.*.}
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T[3]=${T[3]%%.*}
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T[4]=${1#*.*.*.}
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[ ${T[1]} = 0 ] && rval=1
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for t in 1 2 3 4
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do
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[ ${T[${t}]:-999} -gt 255 ] && rval=1
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eval "${2}[${t}]=${T[${t}]}"
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done
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return ${rval}
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}
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USAGE='echo -e "Usage: ${0//*\/} [-v|-h] target/bits [gw] gateway [target/bits [gw] gateway ...]\n\n\tie: ${0} 172.16.0.0/16 gw 192.168.1.1\n" && exit 1'
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INFO="HexRoute 1.0 Copyright (c) 2015 Karl McMurdo
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Converts human readable route information to a dhcpd hex string
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-v Once prints full dhcpd.conf line for route(s)
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Twice also prints option definiton lines for dhcpd.conf
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-h Prints this message
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"
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DHCPHDR="# New Option Type for Windows Client Static Routes
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option new-static-routes code 249 = string;"
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DHCPS="option new-static-routes "
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DHCPE=";"
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BADTARG='echo -e "Invalid target network: ${1}" && exit 2'
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BADBITS='echo -e "Invalid Network bit value: ${1}" && exit 3'
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BADGW='echo -e "Invalid Gateway: ${2}" && exit 4'
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VERBOSE=false
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EXTRAVERBOSE=false
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while [ "${1:0:1}" = "-" ]
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do
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if [ "${1}" = "-v" ]
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then
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$VERBOSE && EXTRAVERBOSE=true
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VERBOSE=true
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elif [ "${1}" = "-h" ]
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then
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echo "${INFO}"
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eval "${USAGE}"
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else
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eval "${USAGE}"
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fi
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shift
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done
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[ ${#} -lt 2 ] && eval "${USAGE}"
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OUT=""
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while [ ${#} -ge 2 ]
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do
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split_ipaddr ${1/\/*/} TARG || eval "${BADTARG}"
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BITS=${1/*\//}
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shift
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[ ${BITS:-X} = X -o "${BITS}" != ${BITS//[^0-9]/} ] && eval "${BADBITS}"
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[ ${BITS} -gt 32 -o ${BITS} -lt 1 ] && eval "${BADBITS}"
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[ ${1:-X} = gw ] && shift
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split_ipaddr ${1:-X} GW || eval "${BADGW}"
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shift
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OUT=${OUT}$( printf ":%02x:%02x" ${BITS} ${TARG[1]} )
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[ ${BITS} -gt 8 ] && OUT=${OUT}$( printf ":%02x" ${TARG[2]} )
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[ ${BITS} -gt 16 ] && OUT=${OUT}$( printf ":%02x" ${TARG[3]} )
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[ ${BITS} -gt 24 ] && OUT=${OUT}$( printf ":%02x" ${TARG[4]} )
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OUT=${OUT}$( printf ":%02x:%02x:%02x:%02x" ${GW[@]} )
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done
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$EXTRAVERBOSE && echo "${DHCPHDR}"
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if $VERBOSE
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then
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echo ${DHCPS}${OUT/:/}${DHCPE}
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else
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echo ${OUT/:/}
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fi
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