zrouter

h1. Boardinfo rcd script

Allow to fetch and preset some early items, like set MAC address.

D-Link DIR-632 example:

<pre>

#!/bin/sh

# BEFORE: ADAPTATION

# PROVIDE: boardinfo

. /etc/rc.subr

. /etc/network.subr

name="boardinfo"

start_cmd="boardinfo_start"

boardinfo_start()

{

	BASEMAC=`dd if=/dev/map/MAC bs=4 skip=1 count=5 2> /dev/null`

	BASEMACVNDR=`echo ${BASEMAC} | sed -E 's/\:.{2}\:.{2}\:.{2}$//'`

	BASEMACDEV=`echo ${BASEMAC} | sed -E 's/.{2}\:.{2}\:.{2}\://; s/\://g; s/^/0x/'`

	WANMACDEV=$((${BASEMACDEV} + 1))

	WLANMACDEV=$((${BASEMACDEV} + 2))

	WANMAC=`printf "${BASEMACVNDR}:%02x:%02x:%02x" $(( (${WANMACDEV} >> 16 ) & 0xff )) $(( (${WANMACDEV} >> 8 ) & 0xff )) $(( ${WANMACDEV} & 0xff ))`

	WLANMAC=`printf "${BASEMACVNDR}:%02x:%02x:%02x" $(( (${WLANMACDEV} >> 16 ) & 0xff )) $(( (${WLANMACDEV} >> 8 ) & 0xff )) $(( ${WLANMACDEV} & 0xff ))`

	kenv BASE_MAC_ADDR="${BASEMAC}"

	kenv LAN_MAC_ADDR="${BASEMAC}"

	kenv WAN_MAC_ADDR="${WANMAC}"

	kenv WLAN_MAC_ADDR="${WLANMAC}"

	echo "Using default board MAC address \"${BASEMAC}\""

}

load_rc_config $name

run_rc_command $*

</pre>

In this example, script read special block of flash (/dev/map/MAC), parse base MAC address from it, and calculate and introduce via kenv(1) MAC addresses for different purposes.