74 lines
1.6 KiB
Bash
Executable File
74 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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# convert:
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# dhcptype=5
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# serverid=172.16.42.102
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# lease=97200
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# interface=eth0
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# ip=172.16.42.177
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# subnet=255.255.255.0
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# mask=24
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# broadcast=172.16.22.255
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# router=172.16.42.98
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# dns=10.34.32.125 10.32.63.5 10.34.255.7 10.11.255.27
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# domain=lab.example.com example.com
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# ntpsrv=10.34.32.125 10.34.255.7
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# into:
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#let cfg=cfg+1
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#if[$cfg]=...; ip[$cfg]=...; ipmask[$cfg]=.../...; gw[$cfg]=...; net[$cfg]=... dns[$cfg]=...
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#exec >/dev/null
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#exec >"$0.out" # debug
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exec 2>&1
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test "$interface" || exit 1
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test "$ip" || exit 1
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# some servers do not return subnet option.
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# guess it for standard private networks.
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if ! test "$mask"; then
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case "$ip" in
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10.*)
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echo "mask assumed 8 for ip=$ip"
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mask=8;;
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#172.16-31.x.x
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172.1[6789].*)
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echo "mask assumed 12 for ip=$ip"
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mask=12;;
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172.2[0123456789].*)
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echo "mask assumed 12 for ip=$ip"
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mask=12;;
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172.3[01].*)
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echo "mask assumed 12 for ip=$ip"
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mask=12;;
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192.168.*)
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echo "mask assumed 16 for ip=$ip"
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mask=16;;
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esac
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fi
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# some servers do not return router option.
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# assume DHCP server is the router.
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if ! test "$router"; then
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if test "$serverid"; then
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router="$serverid"
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echo "No 'router' from the server, assuming 'serverid' is the router: $serverid"
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fi
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fi
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{
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echo "let cfg=cfg+1"
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test "$interface" && echo "if[\$cfg]='$interface'"
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test "$ip" && echo "ip[\$cfg]='$ip'"
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test "$ip" && test "$mask" \
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&& echo "ipmask[\$cfg]='$ip/$mask'"
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test "$router" && echo "gw[\$cfg]='$router'"
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test "$dns" && echo "dns[\$cfg]='$dns'"
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# TODO: I never saw a dhcp server which correctly announces
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# which subnet(s) is/are available thru advertised router
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# Assume 0/0
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echo "net[\$cfg]='0/0'"
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} >"$1"
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