Mauro Rosero P.
e9211614c3
🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
136 lines
3.4 KiB
Bash
Executable file
136 lines
3.4 KiB
Bash
Executable file
#!/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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# Modified: 2025-03-11
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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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# Validate and split an IP address into components
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# Args: $1 - IP address, $2 - Array name to store components
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function split_ipaddr() {
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# Validate basic format
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if [ ${1:-X} = X ] || [ "${1}" != ${1//[^.0-9]/} ] || [ "${1//[0-9]/}" != "..." ]; then
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return 1
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fi
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local rval=0
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local t
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local -a T=([1]="" [2]="" [3]="" [4]="")
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# Split the IP address
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T[1]=${1%%.*}
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T[2]=${1#*.}; T[2]=${T[2]%%.*}
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T[3]=${1#*.*.}; T[3]=${T[3]%%.*}
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T[4]=${1#*.*.*.}
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# Validate each octet
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[ ${T[1]} = 0 ] && rval=1
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for t in 1 2 3 4; 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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# Constants and configuration
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VERSION="1.0"
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AUTHOR="Karl McMurdo"
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YEAR="2015"
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# Usage and help messages
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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 ${VERSION} Copyright (c) ${YEAR} ${AUTHOR}
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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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# DHCP configuration strings
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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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# Error messages
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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: ${2}" && exit 4'
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# Default settings
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VERBOSE=false
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EXTRAVERBOSE=false
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# Process command line options
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while [ "${1:0:1}" = "-" ]; do
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case "${1}" in
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"-v")
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$VERBOSE && EXTRAVERBOSE=true
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VERBOSE=true
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;;
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"-h")
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echo "${INFO}"
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eval "${USAGE}"
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;;
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*)
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eval "${USAGE}"
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;;
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esac
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shift
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done
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# Check if we have enough arguments
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[ ${#} -lt 2 ] && eval "${USAGE}"
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OUT=""
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# Process routes
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while [ ${#} -ge 2 ]; do
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# Parse target network
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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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# Validate bits
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if [ ${BITS:-X} = X ] || [ "${BITS}" != ${BITS//[^0-9]/} ]; then
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eval "${BADBITS}"
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fi
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if [ ${BITS} -gt 32 ] || [ ${BITS} -lt 1 ]; then
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eval "${BADBITS}"
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fi
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# Handle optional "gw" keyword
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[ ${1:-X} = gw ] && shift
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# Parse gateway
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split_ipaddr ${1:-X} GW || eval "${BADGW}"
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shift
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# Build output in hex format
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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" ${GW[@]} )
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done
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# Output results
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$EXTRAVERBOSE && echo "${DHCPHDR}"
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if $VERBOSE; 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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