[9fans] etherconf

[9fans] etherconf

[James A. Robinson]

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I'm probably doing something wrong with /lib/ndb/local, but I can't get
ipconfig to pick up the proper arguments from the file.  So I wrote
a hackish script to set the ethernet device. In case anyone else is
interested...



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#!/bin/rc
#
# etherconf
# 	call ipconfig with information obtained via ndb/query
#	on the ethernet addresses in /net/ether*/addr
#
if (~ $1 -d) {
	debug=1
}
if not debug=0

for (device in `{ls -d /net/ether*|sort -nr}) {
	addr=`{cat $device/addr}
	ip=`{ndb/query ether $addr ip}
	ipgw=''
	ipmask=''
	networks=(`{awk -v 'ip='^$ip 'BEGIN {
		OFS=".";
		if (split(ip, oct, ".") != 4) {
			exit;
		}
		print oct[1],oct[2],oct[3],0;
		print oct[1],oct[2],0,0;
		print oct[1],0,0,0;
	}'})
	for (net in $networks) {
		if (~ $ipgw '') {
			ipgw=`{ndb/query ip $net ipgw}
		}
		if (~ $ipmask '') {
			ipmask=`{ndb/query ip $net ipmask}
		}
	}
	# why no if/else in rc?
	if (~ $ipgw '') {
		echo etherconf: skipping $ip: no ipgw >[1=2]
	}
	if (~ $ipmask '') {
		echo etherconf: skipping $ip: no ipmask >[1=2]
	}
	if (! ~ $ipgw '' && ! ~ $ipmask '') {
		val=($ip $ipgw $ipmask);
		echo -n 'etherconf: '
		if (! ~ $debug 1) {
			echo set $device: $val
			ip/ipconfig ether $device add $val
		}
		if not echo would set $device to $val
	}
}