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Diffstat (limited to 'net-scripts/net.modules.d/bridge.sh')
| -rw-r--r-- | net-scripts/net.modules.d/bridge.sh | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/net-scripts/net.modules.d/bridge.sh b/net-scripts/net.modules.d/bridge.sh new file mode 100644 index 0000000..ec1e2ff --- /dev/null +++ b/net-scripts/net.modules.d/bridge.sh @@ -0,0 +1,198 @@ +# Copyright (c) 2004-2006 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) +brctl() { + LC_ALL=C /sbin/brctl "$@" +} +# void bridge_depend(void) +# +# Sets up the dependancies for the module +bridge_depend() { + before interface macnet + functions interface_down interface_del_addresses interface_set_flag +} + +# void bridge_expose(void) +# +# Expose variables that can be configured +bridge_expose() { + variables bridge bridge_add brctl +} + +# bool bridge_check_installed(void) +# +# Returns 1 if bridge is installed, otherwise 0 +bridge_check_installed() { + [[ -x /sbin/brctl ]] && return 0 + ${1:-false} && eerror "For bridge support, emerge net-misc/bridge-utils" + return 1 +} + +# char* bridge_get_ports(char *interface) +# +# Returns the interfaces added to the given bridge +bridge_get_ports() { + brctl show 2>/dev/null \ + | sed -n -e '/^'"$1"'/,/^\S/ { /^\('"$1"'\|\t\)/s/^.*\t//p }' +} + +# char* bridge_get_bridge(char *interface) +# +# Returns the bridge interface of the given interface +bridge_get_bridge() { + local x="$( brctl show 2>/dev/null \ + | sed -e '1 {d}; /^[^ ]/ { N }; /.*'"$1"'.*/ {s/^\([^ \t]\+\).*/\1/p}; d')" + + local -a a=( ${x} ) + if [[ ${#a[@]} == "1" ]] ; then + echo "${x}" + elif [[ $1 == "${a[3]}" ]] ; then + echo "${a[0]}" + fi +} + +# bool bridge_exists(char *interface) +# +# Returns 0 if the bridge exists, otherwise 1 +bridge_exists() { + brctl show 2>/dev/null | grep -q "^$1" +} + +# bool bridge_create(char *interface) +# +# Creates the bridge - no ports are added here though +# Returns 0 on success otherwise 1 +bridge_create() { + local iface="$1" ifvar="$(bash_variable "$1")" x i opts + + ebegin "Creating bridge ${iface}" + x="$(brctl addbr "${iface}" 2>&1)" + if [[ -n ${x} ]] ; then + if [[ ${x//Package not installed/} != "${x}" ]] ; then + eend 1 "Bridging (802.1d) support is not present in this kernel" + else + eend 1 "${x}" + fi + return 1 + fi + + opts="brctl_${ifvar}[@]" + for i in "${!opts}" ; do + x="${i/ / ${iface} }" + [[ ${x} == "${i}" ]] && x="${x} ${iface}" + x="$(brctl ${x} 2>&1 1>/dev/null)" + [[ -n ${x} ]] && ewarn "${x}" + done + eend 0 +} + +# bool bridge_add_port(char *interface, char *port) +# +# Adds the port to the bridge +bridge_add_port() { + local iface="$1" port="$2" e + + interface_set_flag "${port}" promisc true + interface_up "${port}" + e="$(brctl addif "${iface}" "${port}" 2>&1)" + if [[ -n ${e} ]] ; then + interface_set_flag "${port}" promisc false + echo "${e}" >&2 + return 1 + fi + return 0 +} + +# bool bridge_delete_port(char *interface, char *port) +# +# Deletes a port from a bridge +bridge_delete_port() { + interface_set_flag "$2" promisc false + brctl delif "$1" "$2" +} + +# bool bridge_start(char *iface) +# +# set up bridge +# This can also be called by non-bridges so that the bridge can be created +# dynamically +bridge_pre_start() { + local iface="$1" ports briface i ifvar="$(bash_variable "$1")" opts + ports="bridge_${ifvar}[@]" + briface="bridge_add_${ifvar}" + opts="brctl_${ifvar}[@]" + + [[ -z ${!ports} && -z ${!briface} && -z ${!opts} ]] && return 0 + + # Destroy the bridge if it exists + [[ -n ${!ports} ]] && bridge_stop "${iface}" + + # Allow ourselves to add to the bridge + if [[ -z ${!ports} && -n ${!briface} ]] ; then + ports="${iface}" + iface="${!briface}" + else + ports="${!ports}" + fi + + # Create the bridge if needed + bridge_exists "${iface}" || bridge_create "${iface}" + + if [[ -n ${ports} ]] ; then + einfo "Adding ports to ${iface}" + eindent + + for i in ${ports} ; do + interface_exists "${i}" true || return 1 + done + + for i in ${ports} ; do + ebegin "${i}" + bridge_add_port "${iface}" "${i}" + eend $? || return 1 + done + eoutdent + fi + + return 0 +} + +# bool bridge_stop(char *iface) +# +# Removes the device +# returns 0 +bridge_stop() { + local iface="$1" ports i deletebridge=false extra="" + + if bridge_exists "${iface}" ; then + ebegin "Destroying bridge ${iface}" + interface_down "${iface}" + ports="$(bridge_get_ports "${iface}")" + deletebridge=true + eindent + else + # Work out if we're added to a bridge for removal or not + ports="${iface}" + iface="$(bridge_get_bridge "${iface}")" + [[ -z ${iface} ]] && return 0 + extra=" from ${iface}" + fi + + for i in ${ports} ; do + ebegin "Removing port ${i}${extra}" + bridge_delete_port "${iface}" "${i}" + eend $? + done + + if ${deletebridge} ; then + eoutdent + brctl delbr "${iface}" &>/dev/null + eend 0 + fi + return 0 +} + +# vim: set ft=sh ts=4 : |