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-rw-r--r--net.Linux/bridge.sh113
1 files changed, 113 insertions, 0 deletions
diff --git a/net.Linux/bridge.sh b/net.Linux/bridge.sh
new file mode 100644
index 00000000..89d5687e
--- /dev/null
+++ b/net.Linux/bridge.sh
@@ -0,0 +1,113 @@
+# Copyright 2004-2007 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+bridge_depend() {
+ before interface macnet
+ program /sbin/brctl
+}
+
+_config_vars="$_config_vars bridge bridge_add brctl"
+
+_is_bridge() {
+ brctl show 2>/dev/null | grep -q "^${IFACE}[[:space:]]"
+}
+
+bridge_pre_start() {
+ local ports= brif= opts= iface="${IFACE}" e= x=
+ eval $(_get_array "bridge_${IFVAR}")
+ ports="$@"
+ eval brif=\$bridge_add_${IFVAR}
+ eval $(_get_array "brctl_${IFVAR}")
+ opts="$@"
+ [ -z "${ports}" -a -z "${brif}" -a -z "${opts}" ] && return 0
+
+ [ -n "${ports}" ] && bridge_post_stop
+
+ (
+ if [ -z "${ports}" -a -n "${brif}" ] ; then
+ ports="${IFACE}"
+ IFACE="${brif}"
+ else
+ ports="${ports}"
+ metric=1000
+ fi
+
+ if ! _is_bridge ; then
+ ebegin "Creating bridge ${IFACE}"
+ if ! brctl addbr "${IFACE}" ; then
+ eend 1
+ return 1
+ fi
+
+ eval set -- ${opts}
+ for x in "$@" ; do
+ case " ${x} " in
+ *" ${IFACE} "*) ;;
+ *) x="${x} ${IFACE}" ;;
+ esac
+ brctl ${x}
+ done
+ fi
+
+ if [ -n "${ports}" ] ; then
+ einfo "Adding ports to ${IFACE}"
+ eindent
+
+ eval set -- ${ports}
+ for x in "$@" ; do
+ ebegin "${x}"
+ if ! ifconfig "${x}" promisc up && brctl addif "${IFACE}" "${x}" ; then
+ ifconfig "${x}" -promisc 2>/dev/null
+ eend 1
+ return 1
+ fi
+ eend 0
+ done
+ eoutdent
+ fi
+ )
+}
+
+bridge_post_stop() {
+ local port= ports= delete=false extra=
+
+ if _is_bridge ; then
+ ebegin "Destroying bridge ${IFACE}"
+ _down
+ ports="$( brctl show 2>/dev/null | \
+ sed -n -e '/^'"${IFACE}"'[[:space:]]/,/^\S/ { /^\('"${IFACE}"'[[:space:]]\|\t\)/s/^.*\t//p }')"
+ delete=true
+ iface=${IFACE}
+ eindent
+ else
+ # Work out if we're added to a bridge for removal or not
+ eval set -- $(brctl show 2>/dev/null | sed -e "s/'/'\\\\''/g" -e "s/$/'/g" -e "s/^/'/g")
+ local line=
+ for line in "$@" ; do
+ set -- ${line}
+ if [ "$3" = "${IFACE}" ] ; then
+ iface=$1
+ break
+ fi
+ done
+ [ -z "${iface}" ] && return 0
+ extra=" from ${iface}"
+ fi
+
+ for port in ${ports} ; do
+ ebegin "Removing port ${port}${extra}"
+ ifconfig "${port}" -promisc
+ brctl delif "${iface}" "${port}"
+ eend $?
+ done
+
+ if ${delete} ; then
+ eoutdent
+ brctl delbr "${iface}"
+ eend $?
+ fi
+
+ return 0
+}
+
+# vim: set ts=4 :