Add two scripts for vnet jails
One for if_bridge(4) back-end, another for ng_bridge(4) back-end Sponsored by: FIS Global, Inc.
This commit is contained in:
Devin Teske
Executable
+367
@@ -0,0 +1,367 @@
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#!/bin/sh
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#-
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# Copyright (c) 2016 Devin Teske
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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############################################################ IDENT(1)
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#
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# $Title: if_bridge(4) management script for vnet jails $
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#
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############################################################ INFORMATION
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#
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# Use this tool with jail.conf(5) (or rc.conf(5) ``legacy'' configuration) to
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# manage `vnet' interfaces. In jail.conf(5) format:
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#
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# ### BEGIN EXCERPT ###
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#
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# xxx {
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# host.hostname = "xxx.yyy";
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# path = "/vm/xxx";
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#
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# #
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# # NB: Below 2-lines required
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# # NB: The number of eNb_xxx interfaces should match the number of
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# # arguments given to `jib addm xxx' in exec.prestart value.
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# #
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# vnet;
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# vnet.interface = "e0b_xxx e1b_xxx ...";
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#
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# exec.clean;
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# exec.system_user = "root";
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# exec.jail_user = "root";
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#
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# #
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# # NB: Below 2-lines required
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# # NB: The number of arguments after `jib addm xxx' should match
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# # the number of eNb_xxx arguments in vnet.interface value.
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# #
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# exec.prestart += "jib addm xxx em0 em1 ...";
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# exec.poststop += "jib destroy xxx";
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#
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# # Standard recipe
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# exec.start += "/bin/sh /etc/rc";
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# exec.stop = "/bin/sh /etc/rc.shutdown";
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# exec.consolelog = "/var/log/jail_xxx_console.log";
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# mount.devfs;
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#
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# # Optional (default off)
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# #allow.mount;
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# #allow.set_hostname = 1;
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# #allow.sysvipc = 1;
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# #devfs_ruleset = "11"; # rule to unhide bpf for DHCP
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# }
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#
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# ### END EXCERPT ###
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#
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# In rc.conf(5) ``legacy'' format (used when /etc/jail.conf does not exist):
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#
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# ### BEGIN EXCERPT ###
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#
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# jail_enable="YES"
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# jail_list="xxx"
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#
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# #
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# # Global presets for all jails
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# #
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# jail_devfs_enable="YES" # mount devfs
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#
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# #
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# # Global options (default off)
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# #
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# #jail_mount_enable="YES" # mount /etc/fstab.{name}
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# #jail_set_hostname_allow="YES" # Allow hostname to change
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# #jail_sysvipc_allow="YES" # Allow SysV Interprocess Comm.
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#
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# # xxx
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# jail_xxx_hostname="xxx.shxd.cx" # hostname
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# jail_xxx_rootdir="/vm/xxx" # root directory
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# jail_xxx_vnet_interfaces="e0b_xxx e1bxxx ..." # vnet interface(s)
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# jail_xxx_exec_prestart0="jib addm xxx em0 em1 ..." # bridge interface(s)
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# jail_xxx_exec_poststop0="jib destroy xxx" # destroy interface(s)
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# #jail_xxx_mount_enable="YES" # mount /etc/fstab.xxx
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# #jail_xxx_devfs_ruleset="11" # rule to unhide bpf for DHCP
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#
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# ### END EXCERPT ###
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#
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# Note that the legacy rc.conf(5) format is converted to
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# /var/run/jail.{name}.conf by /etc/rc.d/jail if jail.conf(5) is missing.
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#
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# ASIDE: dhclient(8) inside a vnet jail...
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#
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# To allow dhclient(8) to work inside a vnet jail, make sure the following
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# appears in /etc/devfs.rules (which should be created if it doesn't exist):
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#
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# [devfsrules_jail=11]
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# add include $devfsrules_hide_all
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# add include $devfsrules_unhide_basic
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# add include $devfsrules_unhide_login
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# add include $devfsrules_unhide_bpf
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#
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# And set ether devfs.ruleset="11" (jail.conf(5)) or
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# jail_{name}_devfs_ruleset="11" (rc.conf(5)).
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#
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# NB: While this tool can't create every type of desirable topology, it should
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# handle most setups, minus some which considered exotic or purpose-built.
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#
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############################################################ GLOBALS
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pgm="${0##*/}" # Program basename
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#
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# Global exit status
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#
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SUCCESS=0
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FAILURE=1
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############################################################ FUNCTIONS
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usage()
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{
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local action usage descr
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exec >&2
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echo "Usage: $pgm action [arguments]"
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echo "Actions:"
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for action in \
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addm \
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show \
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show1 \
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destroy \
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; do
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eval usage=\"\$jib_${action}_usage\"
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[ "$usage" ] || continue
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eval descr=\"\$jib_${action}_descr\"
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printf "\t%s\n\t\t%s\n" "$usage" "$descr"
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done
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exit $FAILURE
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}
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action_usage()
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{
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local usage action="$1"
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eval usage=\"\$jib_${action}_usage\"
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echo "Usage: $pgm $usage" >&2
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exit $FAILURE
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}
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mustberoot_to_continue()
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{
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if [ "$( id -u )" -ne 0 ]; then
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echo "Must run as root!" >&2
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exit $FAILURE
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fi
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}
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jib_addm_usage="addm [-b BRIDGE_NAME] NAME interface0 [interface1 ...]"
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jib_addm_descr="Creates e0b_NAME [e1b_NAME ...]"
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jib_addm()
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{
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local OPTIND=1 OPTARG flag bridge=bridge
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while getopts b: flag; do
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case "$flag" in
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b) bridge="${OPTARG:-bridge}" ;;
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*) action_usage addm # NOTREACHED
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esac
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done
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shift $(( $OPTIND - 1 ))
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local name="$1"
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[ "${name:-x}" = "${name#*[!0-9a-zA-Z_]}" -a $# -gt 1 ] ||
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action_usage addm # NOTREACHED
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shift 1 # name
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mustberoot_to_continue
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local iface iface_devid eiface_devid_a eiface_devid_b
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local new num quad i=0
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for iface in $*; do
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# 1. Make sure the interface doesn't exist already
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ifconfig "e${i}a_$name" > /dev/null 2>&1 && continue
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# 2. Bring the interface up
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ifconfig $iface up || return
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# 3. Make sure the interface has been bridged
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if ! ifconfig "$iface$bridge" > /dev/null 2>&1; then
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new=$( ifconfig bridge create ) || return
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ifconfig $new addm $iface || return
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ifconfig $new name "$iface$bridge" || return
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fi
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# 4. Create a new interface to the bridge
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new=$( ifconfig epair create ) || return
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ifconfig "$iface$bridge" addm $new || return
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# 5. Rename the new interface
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ifconfig $new name "e${i}a_$name" || return
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ifconfig ${new%a}b name "e${i}b_$name" || return
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#
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# 6. Set the MAC address of the new interface using a sensible
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# algorithm to prevent conflicts on the network.
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#
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# The formula I'm using is ``SP:SS:SI:II:II:II'' where:
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# + S denotes 16 bits of sum(1) data, split because P (below).
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# + P denotes the special nibble whose value, if one of
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# 2, 6, A, or E (but usually 2) denotes a privately
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# administered MAC address (while remaining routable).
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# + I denotes bits that are inherited from parent interface.
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#
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# The S bits are a CRC-16 checksum of NAME, allowing the jail
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# to change the epair(4) generation order without affecting the
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# MAC address. Meanwhile, if the jail NAME changes (e.g., it
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# was duplicated and given a new name with no other changes),
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# the underlying network interface changes, or the jail is
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# moved to another host, the MAC address will be recalculated
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# to a new, similarly unique value preventing conflict.
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#
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iface_devid=$( ifconfig $iface ether | awk '/ether/,$0=$2' )
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eiface_devid_a=${iface_devid#??:??:?}
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eiface_devid_b=${iface_devid#??:??:?}
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num=$( set -- `echo -n $name | sum` && echo $1 )
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quad=$(( $num & 15 ))
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case "$quad" in
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10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
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13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
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esac
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eiface_devid_a=:$quad$eiface_devid_a
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eiface_devid_b=:$quad$eiface_devid_b
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num=$(( $num >> 4 ))
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quad=$(( $num & 15 ))
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case "$quad" in
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10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
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13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
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esac
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eiface_devid_a=$quad$eiface_devid_a
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eiface_devid_b=$quad$eiface_devid_b
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num=$(( $num >> 4 ))
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quad=$(( $num & 15 ))
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case "$quad" in
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10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
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13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
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esac
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eiface_devid_a=2:$quad$eiface_devid_a
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eiface_devid_b=6:$quad$eiface_devid_b
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num=$(( $num >> 4 ))
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quad=$(( $num & 15 ))
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case "$quad" in
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10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
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13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
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esac
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eiface_devid_a=$quad$eiface_devid_a
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eiface_devid_b=$quad$eiface_devid_b
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ifconfig "e${i}a_$name" ether $eiface_devid_a > /dev/null 2>&1
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ifconfig "e${i}b_$name" ether $eiface_devid_b > /dev/null 2>&1
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i=$(( $i + 1 )) # on to next ng{i}_name
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done # for iface
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}
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jib_show_usage="show"
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jib_show_descr="List possible NAME values for \`show NAME'"
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jib_show1_usage="show NAME"
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jib_show1_descr="Lists ng0_NAME [ng1_NAME ...]"
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jib_show2_usage="show [NAME]"
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jib_show()
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{
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local OPTIND=1 OPTARG flag
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while getopts "" flag; do
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case "$flag" in
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*) action_usage show2 # NOTREACHED
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esac
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done
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shift $(( $OPTIND - 1 ))
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if [ $# -eq 0 ]; then
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ifconfig | awk '
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/^[^:[:space:]]+:/ {
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iface = $1
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sub(/:.*/, "", iface)
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next
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}
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$1 == "groups:" {
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for (n = split($0, group); n > 1; n--) {
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if (group[n] != "bridge") continue
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print iface
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next
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}
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}' |
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xargs -rn1 ifconfig |
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awk '$1 == "member:" &&
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sub(/^e[[:digit:]]+a_/, "", $2), $0 = $2' |
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sort -u
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return
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fi
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ifconfig | awk -v name="$1" '
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match($0, /^e[[:digit:]]+a_/) && sub(/:.*/, "") &&
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substr($1, RSTART + RLENGTH) == name
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' | sort
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}
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jib_destroy_usage="destroy NAME"
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jib_destroy_descr="Destroy e0b_NAME [e1b_NAME ...]"
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jib_destroy()
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{
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local OPTIND=1 OPTARG flag
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while getopts "" flag; do
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case "$flag" in
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*) action_usage destroy # NOTREACHED
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esac
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done
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shift $(( $OPTIND -1 ))
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local name="$1"
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[ "${name:-x}" = "${name#*[!0-9a-zA-Z_]}" -a $# -eq 1 ] ||
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action_usage destroy # NOTREACHED
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mustberoot_to_continue
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jib_show "$name" | xargs -rn1 -I eiface ifconfig eiface destroy
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}
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############################################################ MAIN
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#
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# Command-line arguments
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#
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action="$1"
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[ "$action" ] || usage # NOTREACHED
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#
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# Validate action argument
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#
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if [ "$BASH_VERSION" ]; then
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type="$( type -t "jib_$action" )" || usage # NOTREACHED
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else
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type="$( type "jib_$action" 2> /dev/null )" || usage # NOTREACHED
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fi
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case "$type" in
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*function)
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shift 1 # action
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eval "jib_$action" \"\$@\"
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;;
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*) usage # NOTREACHED
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esac
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################################################################################
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# END
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################################################################################
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Executable
+416
@@ -0,0 +1,416 @@
|
||||
#!/bin/sh
|
||||
#-
|
||||
# Copyright (c) 2016 Devin Teske
|
||||
# All rights reserved.
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
############################################################ IDENT(1)
|
||||
#
|
||||
# $Title: netgraph(4) management script for vnet jails $
|
||||
#
|
||||
############################################################ INFORMATION
|
||||
#
|
||||
# Use this tool with jail.conf(5) (or rc.conf(5) ``legacy'' configuration) to
|
||||
# manage `vnet' interfaces. In jail.conf(5) format:
|
||||
#
|
||||
# ### BEGIN EXCERPT ###
|
||||
#
|
||||
# xxx {
|
||||
# host.hostname = "xxx.yyy";
|
||||
# path = "/vm/xxx";
|
||||
#
|
||||
# #
|
||||
# # NB: Below 2-lines required
|
||||
# # NB: The number of ngN_xxx interfaces should match the number of
|
||||
# # arguments given to `jng bridge xxx' in exec.prestart value.
|
||||
# #
|
||||
# vnet;
|
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# vnet.interface = "ng0_xxx ng1_xxx ...";
|
||||
#
|
||||
# exec.clean;
|
||||
# exec.system_user = "root";
|
||||
# exec.jail_user = "root";
|
||||
#
|
||||
# #
|
||||
# # NB: Below 2-lines required
|
||||
# # NB: The number of arguments after `jng bridge xxx' should match
|
||||
# # the number of ngN_xxx arguments in vnet.interface value.
|
||||
# #
|
||||
# exec.prestart += "jng bridge xxx em0 em1 ...";
|
||||
# exec.poststop += "jng shutdown xxx";
|
||||
#
|
||||
# # Standard recipe
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||||
# exec.start += "/bin/sh /etc/rc";
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||||
# exec.stop = "/bin/sh /etc/rc.shutdown";
|
||||
# exec.consolelog = "/var/log/jail_xxx_console.log";
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||||
# mount.devfs;
|
||||
#
|
||||
# # Optional (default off)
|
||||
# #allow.mount;
|
||||
# #allow.set_hostname = 1;
|
||||
# #allow.sysvipc = 1;
|
||||
# #devfs_ruleset = "11"; # rule to unhide bpf for DHCP
|
||||
# }
|
||||
#
|
||||
# ### END EXCERPT ###
|
||||
#
|
||||
# In rc.conf(5) ``legacy'' format (used when /etc/jail.conf does not exist):
|
||||
#
|
||||
# ### BEGIN EXCERPT ###
|
||||
#
|
||||
# jail_enable="YES"
|
||||
# jail_list="xxx"
|
||||
#
|
||||
# #
|
||||
# # Global presets for all jails
|
||||
# #
|
||||
# jail_devfs_enable="YES" # mount devfs
|
||||
#
|
||||
# #
|
||||
# # Global options (default off)
|
||||
# #
|
||||
# #jail_mount_enable="YES" # mount /etc/fstab.{name}
|
||||
# #jail_set_hostname_allow="YES" # Allow hostname to change
|
||||
# #jail_sysvipc_allow="YES" # Allow SysV Interprocess Comm.
|
||||
#
|
||||
# # xxx
|
||||
# jail_xxx_hostname="xxx.shxd.cx" # hostname
|
||||
# jail_xxx_rootdir="/vm/xxx" # root directory
|
||||
# jail_xxx_vnet_interfaces="ng0_xxx ng1xxx ..." # vnet interface(s)
|
||||
# jail_xxx_exec_prestart0="jng bridge xxx em0 em1 ..." # bridge interface(s)
|
||||
# jail_xxx_exec_poststop0="jng shutdown xxx" # destroy interface(s)
|
||||
# #jail_xxx_mount_enable="YES" # mount /etc/fstab.xxx
|
||||
# #jail_xxx_devfs_ruleset="11" # rule to unhide bpf for DHCP
|
||||
#
|
||||
# ### END EXCERPT ###
|
||||
#
|
||||
# Note that the legacy rc.conf(5) format is converted to
|
||||
# /var/run/jail.{name}.conf by /etc/rc.d/jail if jail.conf(5) is missing.
|
||||
#
|
||||
# ASIDE: dhclient(8) inside a vnet jail...
|
||||
#
|
||||
# To allow dhclient(8) to work inside a vnet jail, make sure the following
|
||||
# appears in /etc/devfs.rules (which should be created if it doesn't exist):
|
||||
#
|
||||
# [devfsrules_jail=11]
|
||||
# add include $devfsrules_hide_all
|
||||
# add include $devfsrules_unhide_basic
|
||||
# add include $devfsrules_unhide_login
|
||||
# add include $devfsrules_unhide_bpf
|
||||
#
|
||||
# And set ether devfs.ruleset="11" (jail.conf(5)) or
|
||||
# jail_{name}_devfs_ruleset="11" (rc.conf(5)).
|
||||
#
|
||||
# NB: While this tool can't create every type of desirable topology, it should
|
||||
# handle most setups, minus some which considered exotic or purpose-built.
|
||||
#
|
||||
############################################################ GLOBALS
|
||||
|
||||
pgm="${0##*/}" # Program basename
|
||||
|
||||
#
|
||||
# Global exit status
|
||||
#
|
||||
SUCCESS=0
|
||||
FAILURE=1
|
||||
|
||||
############################################################ FUNCTIONS
|
||||
|
||||
usage()
|
||||
{
|
||||
local action usage descr
|
||||
exec >&2
|
||||
echo "Usage: $pgm action [arguments]"
|
||||
echo "Actions:"
|
||||
for action in \
|
||||
bridge \
|
||||
graph \
|
||||
show \
|
||||
show1 \
|
||||
shutdown \
|
||||
; do
|
||||
eval usage=\"\$jng_${action}_usage\"
|
||||
[ "$usage" ] || continue
|
||||
eval descr=\"\$jng_${action}_descr\"
|
||||
printf "\t%s\n\t\t%s\n" "$usage" "$descr"
|
||||
done
|
||||
exit $FAILURE
|
||||
}
|
||||
|
||||
action_usage()
|
||||
{
|
||||
local usage action="$1"
|
||||
eval usage=\"\$jng_${action}_usage\"
|
||||
echo "Usage: $pgm $usage" >&2
|
||||
exit $FAILURE
|
||||
}
|
||||
|
||||
mustberoot_to_continue()
|
||||
{
|
||||
if [ "$( id -u )" -ne 0 ]; then
|
||||
echo "Must run as root!" >&2
|
||||
exit $FAILURE
|
||||
fi
|
||||
}
|
||||
|
||||
jng_bridge_usage="bridge [-b BRIDGE_NAME] NAME interface0 [interface1 ...]"
|
||||
jng_bridge_descr="Create ng0_NAME [ng1_NAME ...]"
|
||||
jng_bridge()
|
||||
{
|
||||
local OPTIND=1 OPTARG flag bridge=bridge
|
||||
while getopts b: flag; do
|
||||
case "$flag" in
|
||||
b) bridge="$OPTARG"
|
||||
[ "$bridge" ] || action_usage bridge ;; # NOTREACHED
|
||||
*) action_usage bridge # NOTREACHED
|
||||
esac
|
||||
done
|
||||
shift $(( $OPTIND - 1 ))
|
||||
|
||||
local name="$1"
|
||||
[ "${name:-x}" = "${name#*[!0-9a-zA-Z_]}" -a $# -gt 1 ] ||
|
||||
action_usage bridge # NOTREACHED
|
||||
shift 1 # name
|
||||
|
||||
mustberoot_to_continue
|
||||
|
||||
local iface iface_devid eiface eiface_devid
|
||||
local new num quad i=0
|
||||
for iface in $*; do
|
||||
|
||||
# 0. Make sure the interface doesn't exist already
|
||||
eiface=ng${i}_$name
|
||||
ngctl msg "$eiface:" getifname > /dev/null 2>&1 && continue
|
||||
|
||||
# 1. Bring the interface up
|
||||
ifconfig $iface up || return
|
||||
|
||||
# 2. Set promiscuous mode and don't overwrite src addr
|
||||
ngctl msg $iface: setpromisc 1 || return
|
||||
ngctl msg $iface: setautosrc 0 || return
|
||||
|
||||
# 3. Make sure the interface has been bridged
|
||||
if ! ngctl info ${iface}bridge: > /dev/null 2>&1; then
|
||||
ngctl mkpeer $iface: bridge lower link0 || return
|
||||
ngctl connect $iface: $iface:lower upper link1 ||
|
||||
return
|
||||
ngctl name $iface:lower ${iface}bridge || return
|
||||
fi
|
||||
|
||||
# 3.5. Optionally create a secondary bridge
|
||||
if [ "$bridge" != "bridge" ] &&
|
||||
! ngctl info "$iface$bridge:" > /dev/null 2>&1
|
||||
then
|
||||
num=2
|
||||
while ngctl msg ${iface}bridge: getstats $num \
|
||||
> /dev/null 2>&1
|
||||
do
|
||||
num=$(( $num + 1 ))
|
||||
done
|
||||
ngctl mkpeer $iface:lower bridge link$num link1 ||
|
||||
return
|
||||
ngctl name ${iface}bridge:link$num "$iface$bridge" ||
|
||||
return
|
||||
fi
|
||||
|
||||
# 4. Create a new interface to the bridge
|
||||
num=2
|
||||
while ngctl msg "$iface$bridge:" getstats $num > /dev/null 2>&1
|
||||
do
|
||||
num=$(( $num + 1 ))
|
||||
done
|
||||
ngctl mkpeer "$iface$bridge:" eiface link$num ether || return
|
||||
|
||||
# 5. Rename the new interface
|
||||
while [ ${#eiface} -gt 15 ]; do # OS limitation
|
||||
eiface=${eiface%?}
|
||||
done
|
||||
new=$( set -- `ngctl show -n "$iface$bridge:link$num"` &&
|
||||
echo $2 ) || return
|
||||
ngctl name "$iface$bridge:link$num" $eiface || return
|
||||
ifconfig $new name $eiface || return
|
||||
|
||||
#
|
||||
# 6. Set the MAC address of the new interface using a sensible
|
||||
# algorithm to prevent conflicts on the network.
|
||||
#
|
||||
# The formula I'm using is ``SP:SS:SI:II:II:II'' where:
|
||||
# + S denotes 16 bits of sum(1) data, split because P (below).
|
||||
# + P denotes the special nibble whose value, if one of
|
||||
# 2, 6, A, or E (but usually 2) denotes a privately
|
||||
# administered MAC address (while remaining routable).
|
||||
# + I denotes bits that are inherited from parent interface.
|
||||
#
|
||||
# The S bits are a CRC-16 checksum of NAME, allowing the jail
|
||||
# to change link numbers in ng_bridge(4) without affecting the
|
||||
# MAC address. Meanwhile, if the jail NAME changes (e.g., it
|
||||
# was duplicated and given a new name with no other changes),
|
||||
# the underlying network interface changes, or the jail is
|
||||
# moved to another host, the MAC address will be recalculated
|
||||
# to a new, similarly unique value preventing conflict.
|
||||
#
|
||||
iface_devid=$( ifconfig $iface ether | awk '/ether/,$0=$2' )
|
||||
eiface_devid=${iface_devid#??:??:?}
|
||||
num=$( set -- `echo -n $name | sum` && echo $1 )
|
||||
quad=$(( $num & 15 ))
|
||||
case "$quad" in
|
||||
10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
|
||||
13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
|
||||
esac
|
||||
eiface_devid=:$quad$eiface_devid
|
||||
num=$(( $num >> 4 ))
|
||||
quad=$(( $num & 15 ))
|
||||
case "$quad" in
|
||||
10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
|
||||
13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
|
||||
esac
|
||||
eiface_devid=$quad$eiface_devid
|
||||
num=$(( $num >> 4 ))
|
||||
quad=$(( $num & 15 ))
|
||||
case "$quad" in
|
||||
10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
|
||||
13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
|
||||
esac
|
||||
eiface_devid=2:$quad$eiface_devid
|
||||
num=$(( $num >> 4 ))
|
||||
quad=$(( $num & 15 ))
|
||||
case "$quad" in
|
||||
10) quad=a ;; 11) quad=b ;; 12) quad=c ;;
|
||||
13) quad=d ;; 14) quad=e ;; 15) quad=f ;;
|
||||
esac
|
||||
eiface_devid=$quad$eiface_devid
|
||||
ifconfig $eiface ether $eiface_devid > /dev/null 2>&1
|
||||
|
||||
i=$(( $i + 1 )) # on to next ng{i}_name
|
||||
done # for iface
|
||||
}
|
||||
|
||||
jng_graph_usage="graph [-f] [-T type] [-o output]"
|
||||
jng_graph_descr="Generate network graph (default output is \`jng.svg')"
|
||||
jng_graph()
|
||||
{
|
||||
local OPTIND=1 OPTARG flag
|
||||
local output=jng.svg output_type= force=
|
||||
while getopts fo:T: flag; do
|
||||
case "$flag" in
|
||||
f) force=1 ;;
|
||||
o) output="$OPTARG" ;;
|
||||
T) output_type="$OPTARG" ;;
|
||||
*) action_usage graph # NOTREACHED
|
||||
esac
|
||||
done
|
||||
shift $(( $OPTIND - 1 ))
|
||||
[ $# -eq 0 -a "$output" ] || action_usage graph # NOTREACHED
|
||||
mustberoot_to_continue
|
||||
if [ -e "$output" -a ! "$force" ]; then
|
||||
echo "$output: Already exists (use \`-f' to overwrite)" >&2
|
||||
return $FAILURE
|
||||
fi
|
||||
if [ ! "$output_type" ]; then
|
||||
local valid suffix
|
||||
valid=$( dot -Txxx 2>&1 )
|
||||
for suffix in ${valid##*:}; do
|
||||
[ "$output" != "${output%.$suffix}" ] || continue
|
||||
output_type=$suffix
|
||||
break
|
||||
done
|
||||
fi
|
||||
ngctl dot | dot ${output_type:+-T "$output_type"} -o "$output"
|
||||
}
|
||||
|
||||
jng_show_usage="show"
|
||||
jng_show_descr="List possible NAME values for \`show NAME'"
|
||||
jng_show1_usage="show NAME"
|
||||
jng_show1_descr="Lists ng0_NAME [ng1_NAME ...]"
|
||||
jng_show2_usage="show [NAME]"
|
||||
jng_show()
|
||||
{
|
||||
local OPTIND=1 OPTARG flag
|
||||
while getopts "" flag; do
|
||||
case "$flag" in
|
||||
*) action_usage show2 # NOTREACHED
|
||||
esac
|
||||
done
|
||||
shift $(( $OPTIND - 1 ))
|
||||
mustberoot_to_continue
|
||||
if [ $# -eq 0 ]; then
|
||||
ngctl ls | awk '$4=="bridge",$0=$2' |
|
||||
xargs -rn1 -Ibridge ngctl show bridge: |
|
||||
awk 'sub(/^ng[[:digit:]]+_/, "", $2), $0 = $2' |
|
||||
sort -u
|
||||
return
|
||||
fi
|
||||
ngctl ls | awk -v name="$1" '
|
||||
match($2, /^ng[[:digit:]]+_/) &&
|
||||
substr($2, RSTART + RLENGTH) == name &&
|
||||
$4 == "eiface", $0 = $2
|
||||
' | sort
|
||||
}
|
||||
|
||||
jng_shutdown_usage="shutdown NAME"
|
||||
jng_shutdown_descr="Shutdown ng0_NAME [ng1_NAME ...]"
|
||||
jng_shutdown()
|
||||
{
|
||||
local OPTIND=1 OPTARG flag
|
||||
while getopts "" flag; do
|
||||
case "$flag" in
|
||||
*) action_usage shutdown # NOTREACHED
|
||||
esac
|
||||
done
|
||||
shift $(( $OPTIND -1 ))
|
||||
local name="$1"
|
||||
[ "${name:-x}" = "${name#*[!0-9a-zA-Z_]}" -a $# -eq 1 ] ||
|
||||
action_usage shutdown # NOTREACHED
|
||||
mustberoot_to_continue
|
||||
jng_show "$name" | xargs -rn1 -I eiface ngctl shutdown eiface:
|
||||
}
|
||||
|
||||
############################################################ MAIN
|
||||
|
||||
#
|
||||
# Command-line arguments
|
||||
#
|
||||
action="$1"
|
||||
[ "$action" ] || usage # NOTREACHED
|
||||
|
||||
#
|
||||
# Validate action argument
|
||||
#
|
||||
if [ "$BASH_VERSION" ]; then
|
||||
type="$( type -t "jng_$action" )" || usage # NOTREACHED
|
||||
else
|
||||
type="$( type "jng_$action" 2> /dev/null )" || usage # NOTREACHED
|
||||
fi
|
||||
case "$type" in
|
||||
*function)
|
||||
shift 1 # action
|
||||
eval "jng_$action" \"\$@\"
|
||||
;;
|
||||
*) usage # NOTREACHED
|
||||
esac
|
||||
|
||||
################################################################################
|
||||
# END
|
||||
################################################################################
|
||||
Reference in New Issue
Block a user