[gentoo-ppc-dev] Suggestions for net rc scripts

[Wendell Thomas Duncan]

If these patch suggestions look good, could a developer forward these
patch ideas for the net.eth0 rc-scripts to the right person.


  I just got a new 802.11g base station.  I could not see a good way to
get the iwconfig commands executed as part of the /ete/init.d/net.eth1
scripts.  Maybe I missed a good tool somewhere, but it makes a lot of
sense to do this stuff in the net.eth0 rc-scripts.  These scripts are
part of the baselayout ebuild.

I don't know if the mail-list takes attachments, so I'm putting the
stuff in-line.  There are sections of two files following.

First: Changes to the /etc/conf.d/net configuration file -- new options
there.  Sample file follows.

=======================================================================
=======================================================================

# /etc/conf.d/net:
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/conf.d/net,v 1.7
2002/11/18 19:39:22 azarah Exp $

# Global config file for net.* rc-scripts

# This is basically the ifconfig argument without the ifconfig $iface
#
iface_eth0="192.168.0.107 broadcast 192.168.0.255 netmask 255.255.255.0"
#iface_eth1="207.170.82.202 broadcast 207.0.255.255 netmask 255.255.0.0"

# For DHCP set iface_eth? to "dhcp"
# For passing options to dhcpcd use dhcpcd_eth?
#
#iface_eth0="dhcp"
iface_eth1="dhcp"
#dhcpcd_eth0="..."

# For adding aliases to a interface
#
alias_eth0="192.168.0.108 192.168.0.109"

# NB:  The next is only used for aliases.
#
# To add a custom netmask/broadcast address to created aliases,
# uncomment and change accordingly.  Leave commented to assign
# defaults for that interface.
#
#broadcast_eth0="192.168.0.255 192.168.0.255"
#netmask_eth0="255.255.255.0 255.255.255.0"


# For setting the default gateway
#
#gateway="eth0/192.168.0.1"
gateway="eth0/192.168.0.1"

# For setting up a wireless connection with iwconfig fill in
# the following fields.  To get dhcpcd with WEP encryption 
# normally need essid and a key.  For dhcpcd usually only 
# need essid set.  Other fields are usually optional.
# Remember to set dhcp or the ifconfig argument for the 
# interface being used (see previous statements in file).
wireless_eth1="yes"
wirelessessid_eth1="CTI"
wirelesskey_eth1="???????????????????"
#wirelessnwid_eth1=""
#wirelessfreq_eth1=""
#wirelesschannel_eth1=""
#wirelesssens_eth1=""
#wirelessmode_eth1=""
#wirelessap_eth1=""
#wirelessnick_eth1=""
#wirelessrate_eth1=""
#wirelessrts_eth1=""
#wirelessfrag_eth1=""
#wirelesstxpower_eth1=""
#wirelessenc_eth1=""
#wirelesspower_eth1=""
#wirelessretry_eth1=""

=====================================================================
=====================================================================

Next is the /etc/init.d/net.eth0 modifications.  I did not include
the entire file.  The file was unmodified after what I appended.


=====================================================================
=====================================================================

#!/sbin/runscript
# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /home/cvsroot/gentoo-src/rc-scripts/init.d/net.eth0,v 1.31
2003/09/08 00:11:54 azarah Exp $

#NB: Config is in /etc/conf.d/net


# For pcmcia users. note that pcmcia must be added to the same
# runlevel as the net.* script that needs it.
depend() {
use hotplug pcmcia
}

checkconfig() {
if [ -z "${iface_IFACE}" ]
then
eerror "Please make sure that /etc/conf.d/net has \$iface_$IFACE set"
return 1
fi
if [ -n "${vlans}" -a \! -x /sbin/vconfig ]
then
eerror "For VLAN (802.1q) support, emerge net-misc/vconfig"
return 1
fi

}

setup_env() {
# No reason to check these multiple times in the file
iface="${1/\./_}"
iface_IFACE="$(eval echo \$\{iface_${iface}\})"
dhcpcd_IFACE="$(eval echo \$\{dhcpcd_${iface}\})"
inet6_IFACE="$(eval echo \$\{inet6_${iface}\})"
alias_IFACE="$(eval echo \$\{alias_${iface}\})"
status_IFACE="$(ifconfig | gawk -v IFACE="${iface}" '/Link/ { if ($1 ==
IFACE) print "up" }')"
vlans="$(eval echo \$\{iface_${IFACE}_vlans\})"
wireless_IFACE="$(eval echo \$\{wireless_${iface}\})"
wirelessessid_IFACE="$(eval echo \$\{wirelessessid_${iface}\})"
wirelessnwid_IFACE="$(eval echo \$\{wirelessnwid_${iface}\})"
wirelessfreq_IFACE="$(eval echo \$\{wirelessfreq_${iface}\})"
wirelesschannel_IFACE="$(eval echo \$\{wirelesschannel_${iface}\})"
wirelesssens_IFACE="$(eval echo \$\{wirelesssens_${iface}\})"
wirelessmode_IFACE="$(eval echo \$\{wirelessmode_${iface}\})"
wirelessap_IFACE="$(eval echo \$\{wirelessap_${iface}\})"
wirelessnick_IFACE="$(eval echo \$\{wirelessnick_${iface}\})"
wirelessrate_IFACE="$(eval echo \$\{wirelessrate_${iface}\})"
wirelessrts_IFACE="$(eval echo \$\{wirelessrts_${iface}\})"
wirelessfrag_IFACE="$(eval echo \$\{wirelessfrag_${iface}\})"
wirelesstxpower_IFACE="$(eval echo \$\{wirelesstxpower_${iface}\})"
wirelessenc_IFACE="$(eval echo \$\{wirelessenc_${iface}\})"
wirelesskey_IFACE="$(eval echo \$\{wirelesskey_${iface}\})"
wirelesspower_IFACE="$(eval echo \$\{wirelesspower_${iface}\})"
wirelessretry_IFACE="$(eval echo \$\{wirelessretry_${iface}\})"
}

iface_start() {
local retval=0

setup_env ${1}
checkconfig || return 1

local IFACE="${1}"
ebegin "Bringing ${IFACE} up"

if [ "${wireless_IFACE}" = "yes" ]
then
if [ -n "${wirelessessid_IFACE}" ]
then
iwconfig="${iwconfig} essid ${wirelessessid_IFACE}"
fi

if [ -n "${wirelesskey_IFACE}" ]
then
iwconfig="${iwconfig} key ${wirelesskey_IFACE}"
fi

if [ -n "${wirelessnwid_IFACE}" ]
then
iwconfig="${iwconfig} nwid ${wirelessnwid_IFACE}"
fi

if [ -n "${wirelessfreq_IFACE}" ]
then
iwconfig="${iwconfig} freq ${wirelessfreq_IFACE}"
fi

if [ -n "${wirelesschannel_IFACE}" ]
then
iwconfig="${iwconfig} channel ${wirelesschannel_IFACE}"
fi

if [ -n "${wirelesssens_IFACE}" ]
then
iwconfig="${iwconfig} sens ${wirelesssens_IFACE}"
fi

if [ -n "${wirelessmode_IFACE}" ]
then
iwconfig="${iwconfig} mode ${wirelessmode_IFACE}"
fi

if [ -n "${wirelessap_IFACE}" ]
then
iwconfig="${iwconfig} ap ${wirelessap_IFACE}"
fi

if [ -n "${wirelessnick_IFACE}" ]
then
iwconfig="${iwconfig} nick ${wirelessnick_IFACE}"
fi

if [ -n "${wirelessrate_IFACE}" ]
then
iwconfig="${iwconfig} rate ${wirelessrate_IFACE}"
fi

if [ -n "${wirelessrts_IFACE}" ]
then
iwconfig="${iwconfig} rts ${wirelessrts_IFACE}"
fi

if [ -n "${wirelessfrag_IFACE}" ]
then
iwconfig="${iwconfig} frag ${wirelessfrag_IFACE}"
fi

if [ -n "${wirelesstxpower_IFACE}" ]
then
iwconfig="${iwconfig} txpower ${wirelesstxpower_IFACE}"
fi

if [ -n "${wirelessenc_IFACE}" ]
then
iwconfig="${iwconfig} enc ${wirelessenc_IFACE}"
fi

if [ -n "${wirelesspower_IFACE}" ]
then
iwconfig="${iwconfig} power ${wirelesspower_IFACE}"
fi

if [ -n "${wirelessretry_IFACE}" ]
then
iwconfig="${iwconfig} retry ${wirelessretry_IFACE}"
fi

/usr/sbin/iwconfig ${IFACE} ${iwconfig} >/dev/null || {
retval=$?
eend ${retval} "Failed to execute iwconfig on ${IFACE}"
}
fi


========================================================================
========================================================================

  A better shell programmer might put all my [ -n "${wireless???}" ]
statements in a loop.


-- 
Wendell Thomas Duncan <wendell@××××××××.com>

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