39 lines
726 B
Bash
Executable file
39 lines
726 B
Bash
Executable file
#!/bin/sh
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. /etc/nvram.sh
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alias debug=${DEBUG:-:}
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# valid interface?
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if_valid () (
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ifconfig "$1" >&- 2>&- ||
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[ "${1%%[0-9]}" = "br" ] ||
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{ debug "# missing interface '$1' ignored"; false; }
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)
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hotplug_dev() {
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env -i ACTION=$1 INTERFACE=$2 /sbin/hotplug net
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}
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bitcount () {
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local c=$1
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echo $((
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c=((c>> 1)&0x55555555)+(c&0x55555555),
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c=((c>> 2)&0x33333333)+(c&0x33333333),
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c=((c>> 4)&0x0f0f0f0f)+(c&0x0f0f0f0f),
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c=((c>> 8)&0x00ff00ff)+(c&0x00ff00ff),
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c=((c>>16)&0x0000ffff)+(c&0x0000ffff)
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))
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}
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valid_netmask () {
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return $((-($1)&~$1))
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}
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ip2int () (
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set $(echo $1 | tr '\.' ' ')
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echo $(($1<<24|$2<<16|$3<<8|$4))
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)
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int2ip () {
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echo $(($1>>24&255)).$(($1>>16&255)).$(($1>>8&255)).$(($1&255))
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}
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