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#!/bin/bash
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# Fix any potential localisation problems
# Note that LC_ALL trumps LC_anything_else according to locale(7)
vconfig() {
LC_ALL=C /sbin/vconfig "$@"
}
# void vlan_depend(void)
#
# Sets up the dependancies for the module
vlan_depend() {
after interface
before dhcp
functions iface_start iface_stop
variables vlans
}
# bool vlan_check_installed(void)
#
# Returns 0 if vconfig is installed, otherwise 1
vlan_check_installed() {
[[ -x /sbin/vconfig ]] && return 0
${1:-false} && eerror "For VLAN (802.1q) support, emerge net-misc/vconfig"
return 1
}
# bool vlan_exists(char *interface)
#
# Returns 0 if the interface is a vlan, otherwise 1
vlan_exists() {
[[ ! -d /proc/net/vlan ]] && return 1
egrep -q "^$1[[:space:]]+" /proc/net/vlan/config
}
# char* vlan_get_vlans(char *interface)
#
# Fetch the configured vlans for an interface. Outputs a space
# separated list on stdout. For example "eth0.1 eth0.2 eth0.3"
vlan_get_vlans() {
sed -n -e 's/^\(.*[0-9]\) \(.* \) .*'"$1"'$/\1/p' \
/proc/net/vlan/config 2>/dev/null
}
# bool vlan_check_kernel(void)
#
# Checks to see if the 802.1q module is present - if not try and load it
# Returns 1 if there is a problem
vlan_check_kernel() {
[[ -d /proc/net/vlan ]] && return 0
/sbin/modprobe 8021q &>/dev/null
[[ -d /proc/net/vlan ]] && return 0
eerror "VLAN (802.1q) support is not present in this kernel"
return 1
}
#bool vlan_pre_start(char *iface)
#
# Setup vconfig
vlan_pre_start() {
local iface="$1" opts i x e ifvar="$(bash_variable "$1")"
opts="vconfig_${ifvar}[@]"
[[ -z ${!opts} ]] && return 0
opts=( "${!opts}" )
vlan_check_kernel || return 1
interface_exists "${iface}" || return 1
for (( i=0; i<${#opts[@]}; i++ )) ; do
if [[ ${opts[i]} == "set_name_type "* ]]; then
x="${opts[i]}"
else
x="${opts[i]/ / ${iface} }"
[[ ${x} == "${opts[i]}" ]] && x="${x} ${iface}"
fi
e="$(vconfig ${x} 2>&1 1>/dev/null)"
[[ -z ${e} ]] && continue
eerror "vconfig ${x}"
eerror "${e}"
return 1
done
return 0
}
# bool vlan_post_start(char *iface)
#
# Starts VLANs for a given interface
#
# Always returns 0 (true)
vlan_post_start() {
local iface="$1" vlan vlans vlans_old e ifname ifvar="$(bash_variable "$1")"
vlans="vlans_${ifvar}[@]"
# BACKWARD COMPATIBILITY: check for old vlan variable name
vlans_old="iface_${ifvar}_vlans"
[[ -n ${!vlans_old} && -z ${!vlans} ]] && vlans="vlans_old"
[[ -z ${!vlans} ]] && return 0
vlan_check_kernel || return 1
interface_exists "${iface}" true || return 1
# Start vlans for this interface
for vlan in ${!vlans} ; do
einfo "Adding VLAN ${vlan} to ${iface}"
e="$(vconfig add "${iface}" "${vlan}" 2>&1 1>/dev/null)"
if [[ -n ${e} ]] ; then
eend 1 "${e}"
continue
fi
eend 0
# We need to work out the interface name of our new vlan id
ifname="$( \
sed -n -e 's/^\([^ \t]*\) *| '"${vlan}"' *| .*'"${iface}"'$/\1/p' \
/proc/net/vlan/config
)"
iface_start "${ifname}"
done
return 0
}
# bool vlan_stop(char *iface)
#
# Stops VLANs for a given interface
#
# Always returns 0 (true)
vlan_stop() {
local iface="$1" vlan
vlan_check_installed || return 0
for vlan in $(vlan_get_vlans "${iface}"); do
einfo "Removing VLAN ${vlan##*.} from ${iface}"
iface_stop "${vlan}"
vconfig rem "${vlan}" >/dev/null
done
return 0
}
# vim:ts=4
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