mirror of
https://github.com/firehol/firehol.git
synced 2024-06-30 19:02:21 +00:00
![Philip Whineray](/assets/img/avatar_default.png)
Make it read-all so non-root use in update-ipsets is OK Make the source test for readability so we do not get an error if not
2199 lines
51 KiB
Bash
Executable File
2199 lines
51 KiB
Bash
Executable File
#!/bin/bash
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#
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# Link Balancer - Policy Based Routing for humans...
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#
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# Copyright
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#
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# Copyright (C) 2015 Costa Tsaousis <costa@tsaousis.gr>
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# Copyright (C) 2015 Phil Whineray <phil@sanewall.org>
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#
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# License
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# See the file COPYING for details.
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#
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if [ $(( ${BASH_VERSINFO[0]} )) -lt 4 ]
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then
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echo >&2
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echo >&2 "LinkBalancer requires BASH version 4 or later."
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echo >&2 "You are running version: ${BASH_VERSION}"
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echo >&2 "Please upgrade."
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echo >&2
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exit 1
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fi
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# make sure sbin is included in the path
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# it seems that pppd ip-up.d script need this
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export PATH="$PATH:/sbin:/usr/sbin:/usr/local/sbin"
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PROGRAM_FILE="${0}"
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get_version() {
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GIT_REF='$Format:%d,commit-%h$'
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local IFS=":(), "
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set -- "$GIT_REF"
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ver='$Id$'
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for i in $@
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do
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case "$i" in
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*[0-9].[0-9]*)
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echo "$i" | $SED_CMD -e 's/^v//'
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return 0
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;;
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commit-[0-9a-zA-Z]*)
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ver="$i"
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;;
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esac
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done
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echo "$ver"
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return 0
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}
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# Make sure only root can run us.
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if [ ! "${UID}" = 0 ]
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then
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echo >&2
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echo >&2
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echo >&2 "Only user root can run Link Balancer."
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echo >&2
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exit 1
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fi
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if [ "@AUTOCONF_RUN@" = "Y" ]
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then
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FIREHOL_CONFIG_DIR="@FIREHOL_CONFIG_DIR@"
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else
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FIREHOL_CONFIG_DIR="/etc/firehol"
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fi
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declare -a LB_ORIGINAL_ARGS=("${@}")
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LB_DEFAULT_WORKING_DIRECTORY="${PWD}"
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if [ "$LB_DEBUGGING" ]; then set -v; set -x; fi
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# Make sure we don't get localized results
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export LC_ALL=C
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# Make sure our generated files cannot be accessed by anyone else.
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umask 077
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# link-balancer temporary directory.
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# every instance of link-balancer creates a random directory
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# within this one.
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LB_RUN_DIR="/var/run/link-balancer"
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# If this is set to 1, no checks will be made if the gateways are available.
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# All gateways will be assumed active, if their interfaces are found
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# operational.
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# WHY: When we have a multi-ppp environment the default gateway of the system
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# will be composed my multiple 'nexthop' routes. When a ppp device fails
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# the kernel will remove the entire default gateway, not just the 'nexthop'
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# that is not available any more.
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# By calling link-balancer with option '-f' will enable this option.
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# This option will make link-balancer restore the default gateway as soon
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# as possible.
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# 'link-balancer -f' should thus by called by ppp/ip-down scripts.
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FORCE_ALWAYSON=0
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# If set to 1, link-balancer will not change anything. It will just show
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# what it will execute if run without it.
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DRY_RUN=0
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# If set to 1, link-balancer will output to standard-error all temporary files
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# it generates during its execution.
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DEBUG_ALL_DATA=0
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# The step which increments the priority of the rules for each rule statement
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# in the configuration file.
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LB_RULE_STEP=100
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# Keeps a list of all tables that have been altered during its run.
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declare -A LB_ALTERED=()
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# Where is the link-balancer configuration files?
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LB_CONFIG_DIR="${FIREHOL_CONFIG_DIR}"
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# Link-balancer main configuration file.
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LB_CONFIG="${LB_CONFIG_DIR}/link-balancer.conf"
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# takes either 4 or 6 to switch the functions in ipv4 or ipv6
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LB_DEFAULT_IPV=4
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marksreset() { :; }
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markdef() { :; }
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if [ -r "${FIREHOL_CONFIG_DIR}/firehol-defaults.conf" ]
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then
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source "${FIREHOL_CONFIG_DIR}/firehol-defaults.conf" || exit 1
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fi
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# temporary variable (default LB_DEFAULT_IPV=4)
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LB_IPV=
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# Load commands link-balancer will need.
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which_cmd() {
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local name="$1"
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shift
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if [ "$1" = ":" ]
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then
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eval $name=":"
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return 0
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fi
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unalias $1 >/dev/null 2>&1
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local cmd=
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IFS= read cmd <<-EOF
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$(which $1 2> /dev/null)
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EOF
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if [ $? -gt 0 -o ! -x "${cmd}" ]
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then
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return 1
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fi
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shift
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if [ $# -eq 0 ]
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then
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eval $name="'${cmd}'"
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else
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eval $name="'${cmd} ${@}'"
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fi
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return 0
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}
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require_cmd() {
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local var= val= block=1
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if [ "$1" = "-n" ]
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then
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block=0
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shift
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fi
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var="$1"
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shift
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eval val=\$\{${var}\}
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if [ "${val}" ]
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then
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local cmd="${val/ */}"
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if [ ! -x "$cmd" ]
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then
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echo >&2
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if [ $block -eq 0 ]
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then
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echo >&2 "WARNING: optional command does not exist or is not executable ($cmd)"
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echo >&2 "please add or correct $var in firehol-defaults.conf"
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val=""
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else
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echo >&2 "ERROR: required command does not exist or is not executable ($cmd)"
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echo >&2 "please add or correct $var in firehol-defaults.conf"
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exit 1
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fi
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fi
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# link-balancer calls itself; export our findings so
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# we do not repeat all of the lookups
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eval export "$var"
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return 0
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elif [ $block -eq 0 ]
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then
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eval set -- "$@"
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for cmd in "$@"
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do
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eval "NEED_${var}"="\$NEED_${var}' ${cmd/ */}'"
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done
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return 0
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fi
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if [ $# -eq 0 ]
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then
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eval set -- "\$NEED_${var}"
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fi
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echo >&2
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echo >&2 "ERROR: LINK-BALANCER REQUIRES ONE OF THESE COMMANDS:"
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echo >&2
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echo >&2 " ${@}"
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echo >&2
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echo >&2 " You have requested the use of a link-balancer"
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echo >&2 " feature that requires certain external programs"
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echo >&2 " to be installed in the running system."
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echo >&2
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echo >&2 " Please consult your Linux distribution manual to"
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echo >&2 " install the package(s) that provide these external"
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echo >&2 " programs and retry."
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echo >&2
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echo >&2 " Note that you need an operational 'which' command"
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echo >&2 " for link-balancer to find all the external programs it"
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echo >&2 " needs. Check it yourself. Run:"
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echo >&2
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for x in "${@}"
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do
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echo >&2 " which $x"
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done
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exit 1
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}
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which_all() {
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local cmd_var="$1"
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eval set -- "$2"
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for cmd in "$@"
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do
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which_cmd $cmd_var $cmd && break
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done
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}
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# Where required = Y, if a command is not found, FireHOL will refuse to run.
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# Where required = N, the command only required when it is actually used
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#
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# If a command is specified in /etc/firehol/firehol-defaults.conf it will
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# be used. Otherwise, if the script has been configured with ./configure
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# the detected versions will be used. If the script has not been configured
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# then the list of possible commands is autodetected.
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while IFS="|" read required cmd_var autoconf possibles
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do
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if [ "@AUTOCONF_RUN@" = "Y" ]
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then
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case "$autoconf" in
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"@"*) autoconf=""; ;;
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esac
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fi
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eval set_in_defaults=\"\$$cmd_var\"
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if [ "$set_in_defaults" ]
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then
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:
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elif [ "@AUTOCONF_RUN@" = "Y" -a ! -z "$autoconf" ]
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then
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eval $cmd_var=\"$autoconf\"
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else
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dirname="${0%/*}"
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if [ "$dirname" = "$0" ]; then dirname="."; fi
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PATH="/bin:/usr/bin:/sbin:/usr/sbin:$PATH:$dirname" which_all $cmd_var "$possibles"
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fi
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if [ "$required" = "Y" ]
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then
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require_cmd $cmd_var $possibles
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else
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require_cmd -n $cmd_var $possibles
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fi
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done <<-!
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Y|IP_CMD|@IP@|ip
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Y|DIFF_CMD|@DIFF@|diff
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Y|FLOCK_CMD|@FLOCK@|flock
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Y|GREP_CMD|@GREP@|grep
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Y|EGREP_CMD|@EGREP@|egrep 'grep -E'
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Y|CUT_CMD|@CUT@|cut
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Y|CAT_CMD|@CAT@|cat
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Y|SED_CMD|@SED@|sed
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Y|TR_CMD|@TR@|tr
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Y|LN_CMD|@LN@|ln
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Y|LS_CMD|@LS@|ls
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Y|SLEEP_CMD|@SLEEP@|sleep
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Y|TOUCH_CMD|@TOUCH@|touch
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Y|LOGGER_CMD|@LOGGER@|logger
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Y|MKDIR_CMD|@MKDIR@|mkdir
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Y|CHOWN_CMD|@CHOWN@|chown
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Y|CHMOD_CMD|@CHMOD@|chmod
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Y|RM_CMD|@RM@|rm
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Y|PING_CMD|@PING@|ping
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Y|PING6_CMD|@PING6@|ping6
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Y|TRACEROUTE_CMD|@TRACEROUTE@|traceroute
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Y|SORT_CMD|@SORT@|sort
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Y|MKTEMP_CMD|@MKTEMP@|mktemp
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Y|ENV_CMD|@ENV@|env
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N|WHOIS_CMD|@WHOIS@|whois
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N|JQ_CMD|@JQ@|jq
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N|HEAD_CMD|@HEAD@|head
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N|TPUT_CMD|@TPUT@|tput
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N|WGET_CMD|@WGET@|wget
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N|SCREEN_CMD|@SCREEN@|screen
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Y|IPRANGE_CMD|@IPRANGE@|iprange
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!
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VERSION=$(get_version)
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RUNNING_ON_TERMINAL=0
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if [ "z$1" = "z-nc" ]
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then
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shift
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elif [ ! -z "$TPUT_CMD" ]
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then
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test -t 2 && RUNNING_ON_TERMINAL=1
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if [ -t 2 -a $[$($TPUT_CMD colors 2>/dev/null)] -ge 8 ]
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then
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# Enable colors
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COLOR_RESET="\e[0m"
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COLOR_BLACK="\e[30m"
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COLOR_RED="\e[31m"
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COLOR_GREEN="\e[32m"
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COLOR_YELLOW="\e[33m"
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COLOR_BLUE="\e[34m"
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COLOR_PURPLE="\e[35m"
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COLOR_CYAN="\e[36m"
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COLOR_WHITE="\e[37m"
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COLOR_BGBLACK="\e[40m"
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COLOR_BGRED="\e[41m"
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COLOR_BGGREEN="\e[42m"
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COLOR_BGYELLOW="\e[43m"
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COLOR_BGBLUE="\e[44m"
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COLOR_BGPURPLE="\e[45m"
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COLOR_BGCYAN="\e[46m"
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COLOR_BGWHITE="\e[47m"
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COLOR_BOLD="\e[1m"
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COLOR_DIM="\e[2m"
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COLOR_UNDERLINED="\e[4m"
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COLOR_BLINK="\e[5m"
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COLOR_INVERTED="\e[7m"
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fi
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fi
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# if called with the parameter 'boot', create a new screen that
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# will run forever.
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if [ "$1" = "boot" ]
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then
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shift
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require_cmd SCREEN_CMD
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$SCREEN_CMD -S 'link-balancer' -d -m "$0" loop "${@}"
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exit 0
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fi
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# if called with the parameter 'loop', run forever.
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if [ "$1" = "loop" ]
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then
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shift
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secs="${1}"
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secs=$[ secs + 1 - 1 ]
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test "${secs}" = "0" && secs=300
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shift
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while [ 1 ]
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do
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$0 "${@}"
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echo "Waiting for $secs secs..."
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$SLEEP_CMD $secs
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done
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exit 0
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fi
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if [ ! -d "${LB_RUN_DIR}" ]
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then
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$MKDIR_CMD -p "${LB_RUN_DIR}" || exit 1
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$CHOWN_CMD root:root "${LB_RUN_DIR}" || exit 1
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$CHMOD_CMD 700 "${LB_RUN_DIR}" || exit 1
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fi
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# get an exclusive lock or wait for it to be available
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LOCKFILE="${LB_RUN_DIR}/link-balancer.lock"
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[ "${FLOCKER}" != "${LOCKFILE}" ] && exec $ENV_CMD FLOCKER="${LOCKFILE}" $FLOCK_CMD -e "${LOCKFILE}" "$0" "$@" || :
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cd "${LB_RUN_DIR}" || exit 1
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LB_DIR="`$MKTEMP_CMD -d "${LB_RUN_DIR}/temp-XXXXXXXXXX"`" || exit 1
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# -----------------------------------------------------------------------------
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# Default FireHOL marks
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declare -A MARKS_BITS='([connmark]="6" [usermark]="7" )'
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declare -A MARKS_MASKS='([connmark]="0x0000003f" [usermark]="0x00001fc0" )'
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declare -A MARKS_MAX='([connmark]="63" [usermark]="127" )'
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declare -A MARKS_SHIFT='([connmark]="0" [usermark]="6" )'
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FIREHOL_SPOOL_DIR="${FIREHOL_SPOOL_DIR-/var/spool/firehol}"
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if [ -f "${FIREHOL_SPOOL_DIR}/marks.conf" ]
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then
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source "${FIREHOL_SPOOL_DIR}/marks.conf" || exit 1
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fi
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mark_value() {
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local name="${1}"; shift
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local x=
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if [ -z "${name}" ]
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then
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error "Cannot find the value of mark with name '${name}'."
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return 1
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fi
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if [ -z "${1}" ]
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then
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error "Empty mark value given for mark ${name}."
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return 1
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fi
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if [ -z "${MARKS_MASKS[$name]}" ]
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then
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error "Mark $name does not exist."
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return 1
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fi
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for x in ${@//,/ }
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do
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local x=$[ x + 1 - 1 ]
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if [ $x -gt ${MARKS_MAX[$name]} -o $x -lt 0 ]
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then
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error "Cannot get mark $name of value $x. Mark $name is configured to get values from 0 to ${MARKS_MAX[$name]}. Change firehol-defaults.conf to add more."
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return 1
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fi
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#echo "$[ x << ${MARKS_SHIFT[$name]} ]/${MARKS_MASKS[$name]}"
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printf "0x%08x/${MARKS_MASKS[$name]}\n" "$[ x << ${MARKS_SHIFT[$name]} ]"
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done
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return 0
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}
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# -----------------------------------------------------------------------------
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# Find in the BASH execution stack, the line and the source file that has called us.
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# Before first use the variable PROGRAM_FILE should be set to the file to be excluded.
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# It also sets the variable LAST_CONFIG_LINE on each run.
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FORCE_CONFIG_LINEID=
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LAST_CONFIG_LINE=
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config_line() {
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if [ ! -z "${FORCE_CONFIG_LINEID}" ]
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then
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LAST_CONFIG_LINE="${FORCE_CONFIG_LINEID}"
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else
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# find the config line in the BASH stack
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# start from 2
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# 0 is this line
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# 1 is the caller - our line for sure
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# 2 is the caller's caller - possibly a config file line
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local i= all=${#BASH_SOURCE}
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for (( i = 2; i < $all; i++ ))
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do
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[ ! "${BASH_SOURCE[$i]}" = "${PROGRAM_FILE}" ] && break
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done
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LAST_CONFIG_LINE="${BASH_LINENO[$[i-1]]}@${BASH_SOURCE[$i]}: ${FUNCNAME[$[i-1]]}:"
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fi
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test ! "z$1" = "z-ne" && echo "${LAST_CONFIG_LINE}"
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}
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LB_RESULT_CODE=1
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lb_exit() {
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cd /tmp
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|
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if [ ${DEBUG_ALL_DATA} -eq 1 ]
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then
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echo >&2
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echo >&2
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echo >&2 "---------------------------------------------------------------------"
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echo >&2 "Temporary folder contents:"
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$LS_CMD -l "${LB_DIR}/" >&2
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for x in "${LB_DIR}"/*
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do
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echo >&2
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echo >&2
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echo >&2 "---------------------------------------------------------------------"
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echo >&2 "${x}"
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echo >&2
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$CAT_CMD >&2 "${x}"
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done
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fi
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if [ ! -z "${LB_DIR}" -a -d "${LB_DIR}" ]
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then
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$RM_CMD -rf "${LB_DIR}"
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fi
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enable trap
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enable exit
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trap exit EXIT
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exit ${LB_RESULT_CODE}
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}
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|
|
trap lb_exit EXIT
|
|
trap lb_exit SIGHUP
|
|
trap lb_exit INT
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# COMMON FUNCTIONS
|
|
|
|
syslog() {
|
|
if [ ${DRY_RUN} -eq 0 ]
|
|
then
|
|
$LOGGER_CMD -p daemon.info -t "LinkBalancer" "${*}"
|
|
fi
|
|
}
|
|
|
|
last_debug_depth=0
|
|
DEBUGCMDNNL() {
|
|
local prefix="${1}"; shift
|
|
local name="${1}"; shift
|
|
local depth="${1}"; shift
|
|
|
|
test "$depth" = "" && local depth=$last_debug_depth
|
|
last_debug_depth=$depth
|
|
|
|
# printf >&2 "`date`"
|
|
printf >&2 "% $((depth))s ${prefix} %s " " " "${name}"
|
|
printf >&2 " ${*} "
|
|
}
|
|
|
|
DEBUGCMD() {
|
|
DEBUGCMDNNL "-" "${@}"
|
|
printf >&2 "\n"
|
|
}
|
|
|
|
warning() {
|
|
local line="$(config_line)"
|
|
syslog "WARNING ${line} ${@}"
|
|
|
|
echo >&2
|
|
echo >&2 -e "${COLOR_YELLOW}${COLOR_BOLD}WARNING ${line} $@ ${COLOR_RESET}"
|
|
echo >&2
|
|
|
|
return 0
|
|
}
|
|
|
|
error() {
|
|
local line="$(config_line)"
|
|
syslog "ERROR ${line} ${@}"
|
|
|
|
echo >&2
|
|
echo >&2 -e "${COLOR_RED}${COLOR_BOLD}ERROR ${line} $@ ${COLOR_RESET}"
|
|
echo >&2
|
|
|
|
exit 1
|
|
}
|
|
|
|
run() {
|
|
printf >&2 "${COLOR_BOLD}"
|
|
DEBUGCMDNNL "#" "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}" " ... "
|
|
|
|
local tmp="`$MKTEMP_CMD "${LB_DIR}/run-$$-${RANDOM}-XXXXXXXXXX"`"
|
|
"${@}" >"$tmp" 2>"$tmp.err"
|
|
local ret=$?
|
|
|
|
if [ $ret -eq 0 ]
|
|
then
|
|
printf >&2 "${COLOR_RESET}${COLOR_BGGREEN}${COLOR_BLACK}${COLOR_BOLD} OK ${COLOR_RESET}\n"
|
|
else
|
|
printf >&2 "${COLOR_RESET}${COLOR_BGRED}${COLOR_WHITE}${COLOR_BOLD}${COLOR_BLINK} FAILED ${COLOR_RESET}\n"
|
|
fi
|
|
$CAT_CMD >&2 "$tmp.err"
|
|
$CAT_CMD "$tmp"
|
|
$RM_CMD "$tmp" "$tmp.err"
|
|
return $ret
|
|
}
|
|
|
|
action() {
|
|
if [ ${DRY_RUN} -eq 0 ]
|
|
then
|
|
printf >&2 "${COLOR_YELLOW}"
|
|
run "${@}"
|
|
local ret=$?
|
|
|
|
if [ $ret -ne 0 ]
|
|
then
|
|
warning "Command: '${@}' exited with code $ret."
|
|
else
|
|
syslog "Successfuly run: '${@}'."
|
|
fi
|
|
|
|
return $ret
|
|
fi
|
|
|
|
DEBUGCMDNNL "#" "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}" " ... "
|
|
printf >&2 "DEFERRED\n"
|
|
return 0
|
|
}
|
|
|
|
trim_spaces() {
|
|
$SED_CMD -e "s/[\t\\ ]\+/ /g" -e "s/ \+$//g" -e "s/^ \+//g"
|
|
}
|
|
|
|
loadfile() {
|
|
local file="$1"; shift
|
|
|
|
cd "${LB_CONFIG_DIR}"
|
|
test ! -f "${file}" && syslog "WARNING: file '${file}' does not exist."
|
|
$CAT_CMD "${file}" | $SED_CMD -e "s/#.*$//g" | trim_spaces | $TR_CMD '\n' ' '
|
|
local ret=$?
|
|
cd "${LB_RUN_DIR}"
|
|
|
|
return $ret
|
|
}
|
|
|
|
ipv4() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
local cmd="${1}"; shift
|
|
|
|
case "${cmd}" in
|
|
gateway|table|rules|mark|fwmark|connmark|src|dst|from|to|tos|not)
|
|
"${cmd}" ipv4 "${@}"
|
|
return $?
|
|
;;
|
|
|
|
default)
|
|
error "Command '${cmd}' inherits IP version from its parent. Do not give ${FUNCNAME} for '${cmd}'."
|
|
exit 1
|
|
;;
|
|
|
|
*)
|
|
error "Command '${cmd}' cannot change IP version."
|
|
exit 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
ipv6() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
local cmd="${1}"; shift
|
|
|
|
case "${cmd}" in
|
|
gateway|table|rules|mark|fwmark|connmark|src|dst|from|to|tos|not)
|
|
"${cmd}" ipv6 "${@}"
|
|
return $?
|
|
;;
|
|
|
|
default)
|
|
error "Command '${cmd}' inherits IP version from its parent. Do not give ${FUNCNAME} for '${cmd}'."
|
|
exit 1
|
|
;;
|
|
|
|
*)
|
|
error "Command '${cmd}' cannot change IP version."
|
|
exit 1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# gateway section
|
|
|
|
get_interface_ips() {
|
|
|
|
local ipv="4"
|
|
test "${LB_IPV}" = "6" && local ipv="6"
|
|
|
|
local inet="inet"
|
|
test "${LB_IPV}" = "6" && local inet="inet6"
|
|
|
|
|
|
run $IP_CMD -${ipv} addr show dev "$1" |\
|
|
trim_spaces |\
|
|
$GREP_CMD "${inet} " |\
|
|
$CUT_CMD -d ' ' -f 2 |\
|
|
$CUT_CMD -d '/' -f 1 |\
|
|
$TR_CMD '\n' ' '
|
|
}
|
|
|
|
get_interface_routes() {
|
|
local dev="${1}"; shift
|
|
|
|
local ipv=4
|
|
test "${LB_IPV}" = "6" && local ipv=6
|
|
|
|
local hostnet="/32"
|
|
test "${LB_IPV}" = "6" && local hostnet="/128"
|
|
|
|
local i=
|
|
for i in ${@}
|
|
do
|
|
run $IP_CMD -${ipv} route show dev "${dev}" scope link src "${i}" |\
|
|
trim_spaces |\
|
|
$CUT_CMD -d ' ' -f 1 |\
|
|
$SED_CMD "s|/${hostnet}||g" |\
|
|
$GREP_CMD -v "/" |\
|
|
$TR_CMD '\n' ' '
|
|
done
|
|
}
|
|
|
|
CHECK_PING_COUNT=3
|
|
CHECK_PING_WAIT=10
|
|
check_ping() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
local dev="$1"
|
|
local src="$2"
|
|
local dst="$3"
|
|
|
|
local cmd="$PING_CMD"
|
|
test "${LB_IPV}" = "6" && local cmd="$PING6_CMD"
|
|
|
|
run $cmd -I ${src} -c ${CHECK_PING_COUNT} -w ${CHECK_PING_WAIT} ${dst} >/dev/null
|
|
return $?
|
|
}
|
|
|
|
CHECK_TRACEROUTE_PORT=80
|
|
CHECK_TRACEROUTE_WAIT=2
|
|
check_traceroute() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
local dev="$1"
|
|
local src="$2"
|
|
local dst="$3"
|
|
|
|
local cmd="$TRACEROUTE_CMD -4"
|
|
test "${LB_IPV}" = "6" && local cmd="$TRACEROUTE_CMD -6"
|
|
|
|
local found="`run $cmd -i "${dev}" -r -s ${src} -w ${CHECK_TRACEROUTE_WAIT} -Tn -p ${CHECK_TRACEROUTE_PORT} ${dst} | $GREP_CMD ${dst}`"
|
|
test ! -z "${found}" && return 0
|
|
return 1
|
|
}
|
|
|
|
check_alwayson() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
local dev="$1"
|
|
local src="$2"
|
|
local dst="$3"
|
|
|
|
return 0
|
|
}
|
|
|
|
# this array has one entry per gateway.
|
|
# - the array index is the gateway name
|
|
# - the array value is the number of distinct gateways alive
|
|
declare -A LB_GATEWAYS=()
|
|
|
|
# keep track of the gateways IP version
|
|
declare -A LB_GATEWAYS_IPV=()
|
|
|
|
gateway4() { gateway ipv4 "${@}"; }
|
|
gateway6() { gateway ipv6 "${@}"; }
|
|
gateway() {
|
|
printf >&2 "\n-------------------------------------------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
LB_IPV=${LB_DEFAULT_IPV}
|
|
|
|
if [ ! -z "${work_route}" ]
|
|
then
|
|
local name="${work_route}"
|
|
else
|
|
local name="${1}"
|
|
shift
|
|
fi
|
|
|
|
local gw=
|
|
local dev=
|
|
local src=
|
|
local dst="gateway"
|
|
local check="ping"
|
|
|
|
while [ ! -z "${1}" ]
|
|
do
|
|
case "${1}" in
|
|
ipv4)
|
|
LB_IPV=4
|
|
;;
|
|
|
|
ipv6)
|
|
LB_IPV=6
|
|
;;
|
|
|
|
on|dev)
|
|
local dev="${2}"
|
|
shift
|
|
;;
|
|
|
|
gateway|gw|via)
|
|
local gw="${2//,/ }"
|
|
shift
|
|
;;
|
|
|
|
src|from)
|
|
local src="${2//,/ }"
|
|
shift
|
|
;;
|
|
|
|
check)
|
|
local check="${2}"
|
|
local dst="${3//,/ }"
|
|
shift 2
|
|
;;
|
|
|
|
*)
|
|
error "${FUNCNAME} '${name}': cannot understand parameter '${1}'."
|
|
return 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
LB_GATEWAYS[$name]=0
|
|
LB_GATEWAYS_IPV[$name]=${LB_IPV}
|
|
|
|
# if we don't have source IPs, find them from the interface
|
|
if [ -z "${src}" -o "${src}" = "auto" ]
|
|
then
|
|
local src="`get_interface_ips "${dev}" | $SORT_CMD -u`"
|
|
fi
|
|
|
|
# if we don't have source IPs, cannot proceed
|
|
if [ -z "${src}" ]
|
|
then
|
|
warning "Cannot find gateway ${name} IPs."
|
|
return 1
|
|
fi
|
|
|
|
# if we don't have a gateway, cannot proceed
|
|
if [ -z "${dev}" ]
|
|
then
|
|
error "${FUNCNAME} '${name}': cannot add a gateway without a device."
|
|
return 2
|
|
fi
|
|
|
|
# if we don't have gateway IPs, find them from the interface
|
|
test -z "${gw}" -o "${gw}" = "auto" -o "${gw}" = "detect" && local gw="`get_interface_routes "${dev}" ${src}`"
|
|
|
|
# if we don't have a gateway, cannot proceed
|
|
if [ -z "${gw}" ]
|
|
then
|
|
warning "Cannot find ${name} gateway IPs."
|
|
return 3
|
|
fi
|
|
|
|
# if we don't have a destination, use the gateway
|
|
test -z "${dst}" -o "${dst}" = "auto" -o "${dst}" = "detect" -o "${dst}" = "gateway" && local dst="${gw}"
|
|
test $FORCE_ALWAYSON -eq 1 && local check="alwayson"
|
|
|
|
$CAT_CMD <<EOF_GW
|
|
|
|
--- GATEWAY CONFIGURATION ----
|
|
Gateway : ${name}
|
|
Via IP : ${gw}
|
|
Source IPs: ${src}
|
|
Check : ${check} ${dst}
|
|
IP VERSION: ${LB_IPV}
|
|
|
|
EOF_GW
|
|
|
|
echo "${src}" >"${LB_DIR}/gateway.${name}.source-ips"
|
|
|
|
# -------------------------------------------------------------------------
|
|
# Check if the gateway is alive
|
|
|
|
echo " CHECKING IF GATEWAY ${name} IS ALIVE"
|
|
|
|
local alive=0
|
|
local s=
|
|
for s in ${src}
|
|
do
|
|
local d=
|
|
for d in ${dst}
|
|
do
|
|
test $alive -ne 0 && break
|
|
|
|
check_${check} ${dev} ${s} ${d}
|
|
test $? -eq 0 && local alive=1
|
|
done
|
|
done
|
|
|
|
if [ ${alive} -eq 0 ]
|
|
then
|
|
echo
|
|
echo " Gateway ${name} is not alive."
|
|
return 99
|
|
fi
|
|
|
|
local count=0
|
|
local g=
|
|
for g in ${gw}
|
|
do
|
|
local count=$[count + 1]
|
|
echo "via ${g} dev ${dev}" >>"${LB_DIR}/gateway.${name}.paths"
|
|
done
|
|
|
|
LB_GATEWAYS[$name]="${count}"
|
|
|
|
echo >&2
|
|
echo >&2 -e " ${COLOR_GREEN}${COLOR_BOLD}IPv${LB_IPV} gateway '${name}' is alive, having ${count} active path(s).${COLOR_RESET}"
|
|
return 0
|
|
}
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# table section
|
|
|
|
# this array has one entry per table.
|
|
# - the array index is the table name
|
|
# - the array value is the number of default gateways available
|
|
declare -A LB_TABLES=()
|
|
declare -A LB_TABLES_FALLBACK=()
|
|
|
|
# keep track of the IP version per table
|
|
# if a table is used by both IPv4 and IPv6, '46' should be stored
|
|
declare -A LB_TABLES_IPV=()
|
|
|
|
# keep track of all origin tables
|
|
# if a table is used by both IPv4 and IPv6, '46' should be stored
|
|
declare -A LB_ORIGIN_TABLES=()
|
|
|
|
get_existing_routing_table() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
local table="${1}"
|
|
|
|
if [ "${LB_IPV}" = "6" ]
|
|
then
|
|
run $IP_CMD -6 -o route show table "${table}" |\
|
|
trim_spaces |\
|
|
$SORT_CMD
|
|
else
|
|
run $IP_CMD -4 -o route show table "${table}" |\
|
|
$GREP_CMD -v " via 127.0.0.1 dev lo" |\
|
|
trim_spaces |\
|
|
$SORT_CMD
|
|
fi
|
|
}
|
|
|
|
work_table=
|
|
work_ipv=
|
|
table4() { table ipv4 "${@}"; }
|
|
table6() { table ipv6 "${@}"; }
|
|
table() {
|
|
printf >&2 "\n-------------------------------------------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
LB_IPV=${LB_DEFAULT_IPV}
|
|
|
|
local table="$1"; shift
|
|
|
|
if [ -z "${table}" ]
|
|
then
|
|
error "${FUNCNAME} needs a name."
|
|
return 1
|
|
fi
|
|
|
|
local origin="main"
|
|
local copy_default=1
|
|
while [ ! -z "${1}" ]
|
|
do
|
|
case "${1}" in
|
|
ipv4)
|
|
LB_IPV=4
|
|
;;
|
|
|
|
ipv6)
|
|
LB_IPV=6
|
|
;;
|
|
|
|
from|copy|duplicate)
|
|
local origin="${2}"
|
|
shift
|
|
;;
|
|
|
|
nodefault|keepdefault|nodef)
|
|
local copy_default=0
|
|
;;
|
|
|
|
*)
|
|
error "${FUNCNAME} '${table}': Cannot understand option '${1}'."
|
|
return 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
# set LB_TABLES_IPV
|
|
if [ -z "${LB_TABLES_IPV[$table]}" ]
|
|
then
|
|
LB_TABLES_IPV[$table]="${LB_IPV}"
|
|
elif [ "${LB_TABLES_IPV[$table]}" = "${LB_IPV}" ]
|
|
then
|
|
error "${FUNCNAME}: table ${table} already exists in IPv${LB_IPV}."
|
|
exit 1
|
|
else
|
|
LB_TABLES_IPV[$table]="46"
|
|
fi
|
|
|
|
if [ "${table}" = "${origin}" -o -z "${origin}" -o "${origin}" = "none" ]
|
|
then
|
|
local origin="none"
|
|
fi
|
|
|
|
# give a summary to the user
|
|
$CAT_CMD <<EOF_TABLE
|
|
|
|
--- TABLE CONFIGURATION ---
|
|
Table : ${table}
|
|
Copy from : ${origin}
|
|
IP VERSION : ${LB_IPV}
|
|
|
|
EOF_TABLE
|
|
|
|
if [ ! "${origin}" = "none" ]
|
|
then
|
|
# just link it
|
|
# The source file may not exist yet. This is OK.
|
|
# Later, at finizize_tables() we will check the links to find
|
|
# the dependencies between the tables so that they will be
|
|
# activated in the correct order, so that in one pass all
|
|
# tables will get the final routes.
|
|
# We will also check if the user requested a circular
|
|
# dependency, and stop processing in this case.
|
|
$LN_CMD -s "${LB_DIR}/table.${origin}.routes.${LB_IPV}" "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}"
|
|
test $copy_default -eq 1 && $LN_CMD -s "${LB_DIR}/table.${origin}.default.${LB_IPV}" "${LB_DIR}/table.${table}.origin_default.${LB_IPV}"
|
|
fi
|
|
|
|
work_table="${table}"
|
|
work_ipv="${LB_IPV}"
|
|
LB_TABLES[$table]=0
|
|
LB_TABLES_FALLBACK[$table]=0
|
|
|
|
if [ ! "${origin}" = "none" ]
|
|
then
|
|
# set LB_ORIGIN_TABLES
|
|
if [ -z "${LB_ORIGIN_TABLES[$origin]}" ]
|
|
then
|
|
LB_ORIGIN_TABLES[$origin]="${LB_IPV}"
|
|
elif [ ! "${LB_ORIGIN_TABLES[$origin]}" = "${LB_IPV}" ]
|
|
then
|
|
LB_ORIGIN_TABLES[$origin]="46"
|
|
fi
|
|
fi
|
|
|
|
# instruct the finalizer to run IPvX tables
|
|
$TOUCH_CMD "${LB_DIR}/tables.${LB_IPV}"
|
|
}
|
|
|
|
fallback() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
default "${@}" weight 0
|
|
}
|
|
|
|
default() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
if [ -z "${work_table}" ]
|
|
then
|
|
error "Statement 'default' should appear after a 'table'."
|
|
exit 1
|
|
fi
|
|
|
|
# check IPvX is as it should
|
|
LB_IPV=${work_ipv}
|
|
if [ ! "${LB_TABLES_IPV[${work_table}]}" = "${LB_IPV}" -a ! "${LB_TABLES_IPV[${work_table}]}" = "46" ]
|
|
then
|
|
error "${FUNCNAME} INTERNAL ERROR: Inheritted IPv${LB_IPV} but table is IPv${LB_TABLES_IPV[${work_table}]}."
|
|
exit 1
|
|
fi
|
|
|
|
local gw=
|
|
local weight=100
|
|
while [ ! -z "${1}" ]
|
|
do
|
|
case "${1}" in
|
|
via|gateway|gw)
|
|
gw="${2}"
|
|
shift
|
|
;;
|
|
|
|
weight)
|
|
local weight="${2}"
|
|
shift
|
|
;;
|
|
|
|
*)
|
|
error "${FUNCNAME} on '${work_table}': Cannot understand option '${1}'."
|
|
return 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ -z "${gw}" ]
|
|
then
|
|
error "${FUNCNAME} on '${work_table}': Cannot work without a gateway."
|
|
return 1
|
|
fi
|
|
|
|
if [ -z "${LB_GATEWAYS[$gw]}" ]
|
|
then
|
|
warning "'${gw}' on '${work_table}': Unknown gateway '${gw}' requested."
|
|
return 1
|
|
fi
|
|
|
|
if [ ! "${LB_GATEWAYS_IPV[$gw]}" = "${LB_IPV}" ]
|
|
then
|
|
error "${FUNCNAME} '${gw}' on '${work_table}': Cannot assign an IPv${LB_GATEWAYS_IPV[$gw]} gateway to an IPv${LB_IPV} table."
|
|
exit 1
|
|
fi
|
|
|
|
if [ "${LB_GATEWAYS[$gw]}" = "0" ]
|
|
then
|
|
warning "'${gw}' on '${work_table}': Ignoring gateway '${gw}', it is not alive."
|
|
return 1
|
|
fi
|
|
|
|
if [ ! -s "${LB_DIR}/gateway.${gw}.paths" ]
|
|
then
|
|
warning "'${gw}' on '${work_table}': Gateway '${gw}' does not have any routes."
|
|
return 1
|
|
fi
|
|
|
|
local context="default"
|
|
if [ "${weight}" = "0" ]
|
|
then
|
|
local context="fallback"
|
|
local weight="100"
|
|
local count=${LB_TABLES_FALLBACK[${work_table}]}
|
|
else
|
|
local count=${LB_TABLES[${work_table}]}
|
|
fi
|
|
|
|
while read
|
|
do
|
|
count=$[count + 1]
|
|
echo "nexthop ${REPLY} weight ${weight}" >>"${LB_DIR}/table.${work_table}.${context}.${LB_IPV}"
|
|
done <"${LB_DIR}/gateway.${gw}.paths"
|
|
|
|
if [ "${context}" = "default" ]
|
|
then
|
|
LB_TABLES[${work_table}]=$count
|
|
else
|
|
LB_TABLES_FALLBACK[${work_table}]=$count
|
|
fi
|
|
}
|
|
|
|
lb_diff_route() {
|
|
local cmd="$1"; shift
|
|
local table="$1"; shift
|
|
|
|
case "${cmd}" in
|
|
add)
|
|
action $IP_CMD -${LB_IPV} route add table ${table} "${@}" || action $IP_CMD -${LB_IPV} route append table ${table} "${@}"
|
|
return $?
|
|
;;
|
|
|
|
delete)
|
|
action $IP_CMD -${LB_IPV} route del table ${table} "${@}"
|
|
return $?
|
|
;;
|
|
|
|
same)
|
|
return 0
|
|
;;
|
|
esac
|
|
return 1
|
|
}
|
|
|
|
update_table() {
|
|
printf >&2 "\n -----------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
LB_IPV="${1}"; shift
|
|
local table="${1}"; shift
|
|
|
|
# check IPvX is as it should
|
|
if [ ! "${LB_TABLES_IPV[${table}]}" = "${LB_IPV}" -a ! "${LB_TABLES_IPV[${table}]}" = "46" ]
|
|
then
|
|
error "${FUNCNAME} INTERNAL ERROR: Inheritted IPv${LB_IPV} but table is IPv${LB_TABLES_IPV[${work_table}]}."
|
|
exit 1
|
|
fi
|
|
|
|
# ---------------------------------------------------------------------
|
|
# unit testing - make sure it works right
|
|
|
|
if [ -h "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}" -a ! -f "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}" ]
|
|
then
|
|
error "INTERNAL ERROR: table.${table}.origin_routes.${LB_IPV} is an unresolvable link!"
|
|
exit 1
|
|
fi
|
|
|
|
if [ -h "${LB_DIR}/table.${table}.origin_default.${LB_IPV}" -a ! -f "${LB_DIR}/table.${table}.origin_default.${LB_IPV}" ]
|
|
then
|
|
error "INTERNAL ERROR: table.${table}.origin_default.${LB_IPV} is an unresolvable link!"
|
|
exit 1
|
|
fi
|
|
|
|
|
|
# ---------------------------------------------------------------------
|
|
# decide what will be done for this table
|
|
|
|
# 1. if 'table.${table}.origin_routes' exists, we copy the routing table
|
|
# 2. if 'table.${table}.default' or 'table.${table}.origin_default' exist, we set the default gateway
|
|
# 3. if none of the above is present, we do nothing
|
|
|
|
local routing_filter_cmd="$CAT_CMD"
|
|
if [ -f "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}" -a \( -f "${LB_DIR}/table.${table}.default.${LB_IPV}" -o -f "${LB_DIR}/table.${table}.fallback.${LB_IPV}" -o -f "${LB_DIR}/table.${table}.origin_default.${LB_IPV}" \) ]
|
|
then
|
|
# we do both routes copy and set default gateway
|
|
routing_filter_cmd="$CAT_CMD"
|
|
|
|
elif [ -f "${LB_DIR}/table.${table}.default.${LB_IPV}" -o -f "${LB_DIR}/table.${table}.origin_default.${LB_IPV}" ]
|
|
then
|
|
# we should only process default gateway
|
|
routing_filter_cmd="$GREP_CMD ^default"
|
|
|
|
elif [ -f "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}" ]
|
|
then
|
|
# we should only copy the routing table without the default gateway
|
|
routing_filter_cmd="$GREP_CMD -v ^default"
|
|
|
|
else
|
|
# process both routes and default gateway
|
|
routing_filter_cmd="$CAT_CMD"
|
|
|
|
# commented due to issue 78
|
|
# nothing to be done - just return
|
|
#echo >&2 -e " ${COLOR_GREEN}${COLOR_BOLD}Nothing to be done for table ${table}${COLOR_RESET}"
|
|
#return 0
|
|
fi
|
|
|
|
|
|
# ---------------------------------------------------------------------
|
|
# get the existing routing table
|
|
|
|
get_existing_routing_table "${table}" >"${LB_DIR}/table.${table}.existing_routing_table.${LB_IPV}"
|
|
|
|
# if we don't have origin, assume the existing is the origin
|
|
if [ ! -f "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}" ]
|
|
then
|
|
$CAT_CMD "${LB_DIR}/table.${table}.existing_routing_table.${LB_IPV}" |\
|
|
$GREP_CMD -v ^default >"${LB_DIR}/table.${table}.origin_routes.${LB_IPV}"
|
|
fi
|
|
|
|
if [ ! -f "${LB_DIR}/table.${table}.origin_default.${LB_IPV}" ]
|
|
then
|
|
$CAT_CMD "${LB_DIR}/table.${table}.existing_routing_table.${LB_IPV}" |\
|
|
$GREP_CMD -v ^default >"${LB_DIR}/table.${table}.origin_default.${LB_IPV}"
|
|
fi
|
|
|
|
$CAT_CMD "${LB_DIR}/table.${table}.existing_routing_table.${LB_IPV}" |\
|
|
${routing_filter_cmd} >"${LB_DIR}/table.${table}.existing_routes.${LB_IPV}"
|
|
|
|
|
|
# ---------------------------------------------------------------------
|
|
# generate the new routing table
|
|
|
|
local context="default"
|
|
local gateways=${LB_TABLES[${table}]}
|
|
if [ ${gateways} -eq 0 ]
|
|
then
|
|
# there are no active gateways
|
|
# do we have a fallback?
|
|
if [ ${LB_TABLES_FALLBACK[${table}]} -gt 0 ]
|
|
then
|
|
# we have a fallback
|
|
local gateways=${LB_TABLES_FALLBACK[${table}]}
|
|
local context="fallback"
|
|
|
|
echo >&2 " USING fallback gateways!"
|
|
syslog "Using fallback gateways for table ${table}."
|
|
fi
|
|
fi
|
|
|
|
(
|
|
$CAT_CMD "${LB_DIR}/table.${table}.origin_routes.${LB_IPV}"
|
|
|
|
if [ ${gateways} -eq 0 ]
|
|
then
|
|
# we don't have a gateway alive
|
|
# copy the origin default gateway, if we have to
|
|
$CAT_CMD "${LB_DIR}/table.${table}.origin_default.${LB_IPV}"
|
|
|
|
elif [ ${gateways} -eq 1 ]
|
|
then
|
|
# we only have one gateway alive
|
|
|
|
printf "default "
|
|
$CAT_CMD "${LB_DIR}/table.${table}.${context}.${LB_IPV}" |\
|
|
$SED_CMD -e "s/nexthop //g" -e "s/ weight [0-9]\+//g"
|
|
|
|
else
|
|
# we have many (2+) gateways alive
|
|
|
|
printf "default "
|
|
$CAT_CMD "${LB_DIR}/table.${table}.${context}.${LB_IPV}" |\
|
|
$TR_CMD '\n' ' '
|
|
|
|
fi
|
|
) | trim_spaces |\
|
|
$SORT_CMD -u >"${LB_DIR}/table.${table}.new_routing_table.${LB_IPV}"
|
|
|
|
# keep the new routes of our dependands
|
|
$CAT_CMD "${LB_DIR}/table.${table}.new_routing_table.${LB_IPV}" |\
|
|
$GREP_CMD -v ^default >"${LB_DIR}/table.${table}.routes.${LB_IPV}"
|
|
|
|
$CAT_CMD "${LB_DIR}/table.${table}.new_routing_table.${LB_IPV}" |\
|
|
$GREP_CMD ^default >"${LB_DIR}/table.${table}.default.${LB_IPV}"
|
|
|
|
# generate the new routing table for diff
|
|
$CAT_CMD "${LB_DIR}/table.${table}.new_routing_table.${LB_IPV}" |\
|
|
${routing_filter_cmd} >"${LB_DIR}/table.${table}.new_routes.${LB_IPV}"
|
|
|
|
# ---------------------------------------------------------------------
|
|
# diff magic...
|
|
# generate a script to process the diffs of the two files
|
|
|
|
#echo "EXISTING"
|
|
#cat "${LB_DIR}/table.${table}.existing_routes.${LB_IPV}"
|
|
#echo "NEW filter: ${routing_filter_cmd}"
|
|
#cat "${LB_DIR}/table.${table}.new_routes.${LB_IPV}"
|
|
|
|
$DIFF_CMD >"${LB_DIR}/table.${table}.script.${LB_IPV}" \
|
|
--old-line-format="lb_diff_route delete ${table} %L" \
|
|
--new-line-format="lb_diff_route add ${table} %L" \
|
|
--unchanged-line-format="lb_diff_route same ${table} %L" \
|
|
"${LB_DIR}/table.${table}.existing_routes.${LB_IPV}" \
|
|
"${LB_DIR}/table.${table}.new_routes.${LB_IPV}"
|
|
|
|
if [ $? -eq 1 ]
|
|
then
|
|
source "${LB_DIR}/table.${table}.script.${LB_IPV}"
|
|
LB_ALTERED[table.${table}]=1
|
|
|
|
local def=0
|
|
test ! -z "`$GREP_CMD " default " "${LB_DIR}/table.${table}.script.${LB_IPV}"`" && def=1
|
|
|
|
echo >&2
|
|
echo >&2 -e " ${COLOR_YELLOW}${COLOR_BOLD}Updated routing table ${table}!${COLOR_RESET}"
|
|
|
|
updated_routes "${table}" "${def}"
|
|
else
|
|
echo >&2
|
|
echo >&2 -e " ${COLOR_GREEN}${COLOR_BOLD}Table's ${table} routing is already as it should.${COLOR_RESET}"
|
|
echo >&2
|
|
fi
|
|
}
|
|
|
|
finalize_tables() {
|
|
printf >&2 "\n-------------------------------------------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
LB_IPV="${1}"
|
|
if [ -z "${LB_IPV}" ]
|
|
then
|
|
error "INTERNAL ERROR: Detected empty LB_IPV."
|
|
exit 1
|
|
fi
|
|
|
|
# put all the tables in this variable
|
|
local -A all=()
|
|
local x=
|
|
for x in "${!LB_ORIGIN_TABLES[@]}"
|
|
do
|
|
test "${LB_ORIGIN_TABLES[$x]}" = "${LB_IPV}" -o "${LB_ORIGIN_TABLES[$x]}" = "46" && all[$x]=1
|
|
done
|
|
for x in "${!LB_TABLES[@]}"
|
|
do
|
|
test "${LB_TABLES_IPV[$x]}" = "${LB_IPV}" -o "${LB_TABLES_IPV[$x]}" = "46" && all[$x]=1
|
|
done
|
|
|
|
# execute the tables with circular dependency check
|
|
while [ "${#all[@]}" -ne 0 ]
|
|
do
|
|
local found=0
|
|
for x in "${!all[@]}"
|
|
do
|
|
printf >&2 "\n > Checking dependency for IPv${LB_IPV} table ${x}... "
|
|
|
|
if [ ! -h "${LB_DIR}/table.${x}.origin_routes.${LB_IPV}" -o -f "${LB_DIR}/table.${x}.origin_routes.${LB_IPV}" ]
|
|
then
|
|
if [ ! -z "${LB_TABLES[$x]}" ]
|
|
then
|
|
printf >&2 "READY!\n"
|
|
update_table "${LB_IPV}" "${x}"
|
|
else
|
|
printf >&2 "ORIGIN ONLY\n"
|
|
|
|
get_existing_routing_table "${x}" >"${LB_DIR}/table.${x}.existing_routing_table.${LB_IPV}" || exit 1
|
|
|
|
$CAT_CMD "${LB_DIR}/table.${x}.existing_routing_table" |\
|
|
$GREP_CMD -v ^default >"${LB_DIR}/table.${x}.routes.${LB_IPV}"
|
|
|
|
$CAT_CMD "${LB_DIR}/table.${x}.existing_routing_table" |\
|
|
$GREP_CMD ^default >"${LB_DIR}/table.${x}.default.${LB_IPV}"
|
|
fi
|
|
|
|
unset all[$x]
|
|
local found=1
|
|
break
|
|
else
|
|
printf >&2 "NOT READY\n"
|
|
fi
|
|
done
|
|
|
|
if [ $found -eq 0 ]
|
|
then
|
|
error "CIRCULAR DEPENDENCY among the tables detected."
|
|
exit 1
|
|
fi
|
|
done
|
|
}
|
|
|
|
# this is to overwritten by the caller
|
|
# it is called only when routing rules are updated (added/removed)
|
|
updated_routes() {
|
|
local table="${1}"
|
|
local def="${2}" # if this is 1, the default route has been updated
|
|
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# policy based routing - rules section
|
|
|
|
LB_DO_RULES_IPV4=0
|
|
LB_DO_RULES_IPV6=0
|
|
LB_RULES_DEFAULT_IPV=${LB_DEFAULT_IPV}
|
|
|
|
policy4() { policy ipv4 "${@}"; }
|
|
policy6() { policy ipv6 "${@}"; }
|
|
policy() {
|
|
printf >&2 "\n-------------------------------------------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
LB_RULES_DEFAULT_IPV=${LB_DEFAULT_IPV}
|
|
|
|
while [ ! -z "${1}" ]
|
|
do
|
|
case "${1}" in
|
|
ipv4)
|
|
LB_RULES_DEFAULT_IPV=4
|
|
;;
|
|
|
|
ipv6)
|
|
LB_RULES_DEFAULT_IPV=6
|
|
;;
|
|
|
|
*)
|
|
error "${FUNCNAME}: Cannot understand option '${1}'."
|
|
exit 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
if [ "${LB_RULES_DEFAULT_IPV}" = "6" ]
|
|
then
|
|
LB_DO_RULES_IPV6=1
|
|
else
|
|
LB_DO_RULES_IPV4=1
|
|
fi
|
|
$TOUCH_CMD "${LB_DIR}/rules.${LB_RULES_DEFAULT_IPV}"
|
|
}
|
|
|
|
LB_RULE_BASE4=1000
|
|
LB_RULE_BASE6=1000
|
|
|
|
rules4() { rules ipv4 "${@}"; }
|
|
rules6() { rules ipv6 "${@}"; }
|
|
rules() {
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
LB_IPV=${LB_RULES_DEFAULT_IPV}
|
|
|
|
local -a tos=()
|
|
local -a mark=()
|
|
local -a src=()
|
|
local -a dst=()
|
|
local -a inface=()
|
|
|
|
local marktype=
|
|
|
|
local action=
|
|
local table=
|
|
local not=
|
|
local cmd=
|
|
while [ ! -z "${1}" ]
|
|
do
|
|
case "${1}" in
|
|
ipv4)
|
|
LB_IPV=4
|
|
LB_DO_RULES_IPV4=1
|
|
$TOUCH_CMD "${LB_DIR}/rules.${LB_IPV}"
|
|
;;
|
|
|
|
ipv6)
|
|
LB_IPV=6
|
|
LB_DO_RULES_IPV6=1
|
|
$TOUCH_CMD "${LB_DIR}/rules.${LB_IPV}"
|
|
;;
|
|
|
|
at|lookup|table)
|
|
local action="lookup ${2}"
|
|
local table="${2}"
|
|
shift
|
|
;;
|
|
|
|
# nat) # this converts the rule to 'masquerade' and gives a warning it is deprecated
|
|
|
|
prohibit|unreachable) # 'reject' gives: Error: argument "reject" is wrong: Failed to parse rule type
|
|
local action="${1}"
|
|
;;
|
|
|
|
rawmark)
|
|
local marktype=
|
|
local cmd="mark"
|
|
;;
|
|
|
|
mark)
|
|
local marktype="usermark"
|
|
local cmd="mark"
|
|
;;
|
|
|
|
custommark)
|
|
local marktype="${2}"; shift
|
|
local cmd="mark"
|
|
if [ -z "${MARKS_MASKS[$marktype]}" ]
|
|
then
|
|
error "Mark type '${marktype}' is not defined."
|
|
exit 1
|
|
fi
|
|
;;
|
|
|
|
connmark)
|
|
local marktype="connmark"
|
|
local cmd="mark"
|
|
;;
|
|
|
|
src|from)
|
|
local cmd="src"
|
|
;;
|
|
|
|
inface|iif)
|
|
local cmd="inface"
|
|
;;
|
|
|
|
dst|to)
|
|
local cmd="dst"
|
|
;;
|
|
|
|
tos)
|
|
local cmd="tos"
|
|
;;
|
|
|
|
not)
|
|
local not="not"
|
|
;;
|
|
|
|
gw-src-ips)
|
|
local x=${2}; shift
|
|
if [ -z "${LB_GATEWAYS[$x]}" ]
|
|
then
|
|
error "Cannot find gateway '${x}'."
|
|
exit 1
|
|
fi
|
|
if [ ! "${LB_GATEWAYS_IPV[$x]}" = "${LB_IPV}" ]
|
|
then
|
|
error "Cannot add IPv${LB_GATEWAYS_IPV[$x]} gateway source IPs to IPv${LB_IPV} rules."
|
|
exit 1
|
|
fi
|
|
if [ "${LB_GATEWAYS[$x]}" -eq 0 ]
|
|
then
|
|
warning "Ignoring rules for gateway '${x}'. Gateway '${x}' is not alive."
|
|
else
|
|
src+=(`loadfile "${LB_DIR}/gateway.${x}.source-ips"`)
|
|
fi
|
|
;;
|
|
|
|
loadfile)
|
|
case "${cmd}" in
|
|
src) src+=(`loadfile "${2}"`);;
|
|
dst) dst+=(`loadfile "${2}"`);;
|
|
esac
|
|
shift
|
|
;;
|
|
|
|
*)
|
|
case "${cmd}" in
|
|
mark)
|
|
if [ -z "${marktype}" ]
|
|
then
|
|
mark+=( ${1//,/ } )
|
|
else
|
|
mark+=( $(mark_value $marktype ${1//,/ }) )
|
|
fi
|
|
;;
|
|
|
|
tos) tos+=( ${1//,/ } );;
|
|
src) src+=( ${1//,/ } );;
|
|
dst) dst+=( ${1//,/ } );;
|
|
inface) inface+=( ${1//,/ } );;
|
|
esac
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
local base=
|
|
if [ "${LB_IPV}" = "6" ]
|
|
then
|
|
local base=${LB_RULE_BASE6}
|
|
LB_DO_RULES_IPV6=1
|
|
else
|
|
local base=${LB_RULE_BASE4}
|
|
LB_DO_RULES_IPV4=1
|
|
fi
|
|
$TOUCH_CMD "${LB_DIR}/rules.${LB_IPV}"
|
|
|
|
# give some space between rules
|
|
base=$[ ( (base + LB_RULE_STEP) / LB_RULE_STEP ) * LB_RULE_STEP ]
|
|
|
|
# put it back, in case we return before the end
|
|
if [ "${LB_IPV}" = "6" ]
|
|
then
|
|
LB_RULE_BASE6=${base}
|
|
else
|
|
LB_RULE_BASE4=${base}
|
|
fi
|
|
|
|
if [ "${#mark[*]}${#tos[*]}${#src[*]}${#dst[*]}${#inface[*]}" = "00000" ]
|
|
then
|
|
warning "No rules generated."
|
|
return 0
|
|
fi
|
|
|
|
if [ ! -z "${table}" ]
|
|
then
|
|
if [ -z "${LB_TABLES[$table]}" ]
|
|
then
|
|
error "${FUNCNAME}: table $table does not exist."
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
test ${#mark[@]} -eq 0 && mark=('any')
|
|
test ${#tos[@]} -eq 0 && tos=('any')
|
|
test ${#src[@]} -eq 0 && src=('any')
|
|
test ${#dst[@]} -eq 0 && dst=('any')
|
|
test ${#inface[@]} -eq 0 && inface=('any')
|
|
|
|
local m=
|
|
local t=
|
|
local s=
|
|
local d=
|
|
local i=
|
|
for m in ${mark[@]}
|
|
do
|
|
test "${m}" = "any" && local m=
|
|
test ! -z "${m}" && local m="fwmark ${m}"
|
|
|
|
for t in ${tos[@]}
|
|
do
|
|
test "${t}" = "any" && local t=
|
|
test ! -z "${t}" && local t="tos ${t}"
|
|
|
|
for i in ${inface[@]}
|
|
do
|
|
test "${i}" = "any" && local i=
|
|
test ! -z "${i}" && local d="iif ${i}"
|
|
|
|
for s in ${src[@]}
|
|
do
|
|
test "${s}" = "any" && local s="all"
|
|
test ! -z "${s}" && local s="from ${s}"
|
|
|
|
for d in ${dst[@]}
|
|
do
|
|
test "${d}" = "any" && local d=
|
|
test ! -z "${d}" && local d="to ${d}"
|
|
|
|
echo "priority ${base} ${not} ${s} ${d} ${t} ${m} ${i} ${action}" >>"${LB_DIR}/rules.${LB_IPV}"
|
|
base=$[base + 1]
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
|
|
# put the priority back to the global variable
|
|
if [ "${LB_IPV}" = "6" ]
|
|
then
|
|
LB_RULE_BASE6=${base}
|
|
else
|
|
LB_RULE_BASE4=${base}
|
|
fi
|
|
}
|
|
|
|
mark() { rules ${FUNCNAME} "${@}"; }
|
|
fwmark() { rules ${FUNCNAME} "${@}"; }
|
|
connmark() { rules ${FUNCNAME} "${@}"; }
|
|
custommark() { rules ${FUNCNAME} "${@}"; }
|
|
rawmark() { rules ${FUNCNAME} "${@}"; }
|
|
src() { rules ${FUNCNAME} "${@}"; }
|
|
dst() { rules ${FUNCNAME} "${@}"; }
|
|
from() { rules ${FUNCNAME} "${@}"; }
|
|
to() { rules ${FUNCNAME} "${@}"; }
|
|
tos() { rules ${FUNCNAME} "${@}"; }
|
|
not() { rules ${FUNCNAME} "${@}"; }
|
|
|
|
# function to be called by the diff generated script
|
|
lb_diff_rule() {
|
|
local cmd="$1"; shift
|
|
|
|
case "${cmd}" in
|
|
add)
|
|
action $IP_CMD -${LB_IPV} rule add "${@}"
|
|
return $?
|
|
;;
|
|
|
|
delete)
|
|
action $IP_CMD -${LB_IPV} rule del "${@}"
|
|
return $?
|
|
;;
|
|
|
|
same)
|
|
return 0
|
|
;;
|
|
esac
|
|
return 1
|
|
}
|
|
|
|
normalize_rules() {
|
|
$SED_CMD -e "s| fwmark 0x\([0-9a-fA-F]\)\([ /]\)| fwmark 0x0\1\2|g" \
|
|
-e "s| tos 0x\([0-9a-fA-F]\) | tos 0x0\1|g" \
|
|
-e "s| tos 0x02 | tos mincost |g" \
|
|
-e "s| tos 0x04 | tos reliability |g" \
|
|
-e "s| tos 0x08 | tos throughput |g" \
|
|
-e "s| tos 0x0a | tos lowdelay |g" \
|
|
-e "s| tos 2 | tos mincost |g" \
|
|
-e "s| tos 4 | tos reliability |g" \
|
|
-e "s| tos 8 | tos throughput |g" \
|
|
-e "s| tos 10 | tos lowdelay |g" \
|
|
-e "s|0x0\+|0x|g"
|
|
}
|
|
|
|
finalize_rules() {
|
|
printf >&2 "\n-------------------------------------------------------------------------------\n"
|
|
DEBUGCMD "${FUNCNAME}" "${#FUNCNAME[*]}" "${@}"
|
|
|
|
LB_IPV="${1}"
|
|
if [ -z "${LB_IPV}" ]
|
|
then
|
|
error "INTERNAL ERROR: Detected empty LB_IPV."
|
|
exit 1
|
|
fi
|
|
|
|
# copy the tables and remove 'main' from it
|
|
local string=$(declare -p LB_TABLES)
|
|
eval "local -A tables=${string#*=}"
|
|
unset tables[main]
|
|
|
|
# get all the rules for all the tables except 'main'
|
|
run $IP_CMD -${LB_IPV} rule show |\
|
|
trim_spaces |\
|
|
$EGREP_CMD -v "^(0|32766|32767)" |\
|
|
$SED_CMD "s/\(^[0-9]\+\): /priority \1 /g" |\
|
|
normalize_rules |\
|
|
$SORT_CMD >"${LB_DIR}/rules.existing.${LB_IPV}"
|
|
|
|
# fix the generated rules, from the rules()
|
|
$CAT_CMD "${LB_DIR}/rules.${LB_IPV}" |\
|
|
trim_spaces |\
|
|
normalize_rules |\
|
|
$SORT_CMD -u >"${LB_DIR}/rules.new.${LB_IPV}"
|
|
|
|
# diff magic...
|
|
# generate a script to process the diffs of the two files
|
|
$DIFF_CMD >"${LB_DIR}/rules.script.${LB_IPV}" \
|
|
--old-line-format="lb_diff_rule delete ${table} %L" \
|
|
--new-line-format="lb_diff_rule add ${table} %L" \
|
|
--unchanged-line-format="lb_diff_rule same ${table} %L" \
|
|
"${LB_DIR}/rules.existing.${LB_IPV}" \
|
|
"${LB_DIR}/rules.new.${LB_IPV}"
|
|
|
|
if [ $? -eq 1 ]
|
|
then
|
|
source "${LB_DIR}/rules.script.${LB_IPV}"
|
|
LB_ALTERED[routing.rules.ipv${LB_IPV}]=1
|
|
|
|
echo >&2
|
|
echo >&2 -e " ${COLOR_YELLOW}${COLOR_BOLD}Updated IPv${LB_IPV} routing rules!${COLOR_RESET}"
|
|
|
|
updated_rules
|
|
else
|
|
echo >&2
|
|
echo >&2 -e " ${COLOR_GREEN}${COLOR_BOLD}Nothing to be done for IPv${LB_IPV} routing rules.${COLOR_RESET}"
|
|
fi
|
|
}
|
|
|
|
# this is to overwritten by the caller
|
|
# it is called only when routing rules are updated (added/removed)
|
|
updated_rules() {
|
|
return 0
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# other functions
|
|
|
|
# this tries to find all the IPs of an Autonomous System (AS).
|
|
# 1. it requires an IP from the caller.
|
|
# 2. it queries whois for this IP to find its AS.
|
|
# 3. it queries RIPE to get all the IP address space for this AS.
|
|
asips() {
|
|
require_cmd WHOIS_CMD
|
|
require_cmd JQ_CMD
|
|
require_cmd HEAD_CMD
|
|
require_cmd WGET_CMD
|
|
|
|
local ip="${1}"
|
|
|
|
if [ -z "${ip}" ]
|
|
then
|
|
echo >&2 "${FUNCNAME} requires an IP address."
|
|
echo >&2 "Commands: 'whois' and 'jq' have to be installed for this to work."
|
|
return 1
|
|
fi
|
|
|
|
echo >&2
|
|
echo >&2 "Querying whois for IP ${ip}..."
|
|
local as="`$WHOIS_CMD "${1}" | $GREP_CMD "origin:" | trim_spaces | $CUT_CMD -d ' ' -f 2 | $GREP_CMD ^AS | $HEAD_CMD -n 1`"
|
|
if [ -z "${as}" ]
|
|
then
|
|
echo >&2 "Cannot find the Autonomous System of IP '${ip}'."
|
|
return 1
|
|
fi
|
|
echo >&2 "IP ${ip} is part of Autonomous System: ${as}."
|
|
|
|
echo >&2
|
|
echo >&2 "Querying RIPE for ${as}..."
|
|
$WGET_CMD -O - "https://stat.ripe.net/data/as-routing-consistency/data.json?resource=${as}" |\
|
|
$JQ_CMD .data.prefixes[].prefix |\
|
|
$SED_CMD -e 's| ||g' -e 's|"||g' |\
|
|
$EGREP_CMD "^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/[0-9]+" |\
|
|
$IPRANGE_CMD
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# help
|
|
|
|
emit_version() {
|
|
$CAT_CMD <<EOF
|
|
|
|
FireHOL LinkBalancer $VERSION
|
|
(C) Copyright 2015 Costa Tsaousis <costa@tsaousis.gr>
|
|
(C) Copyright 2015 Phil Whineray <phil@firehol.org>
|
|
FireHOL is distributed under the GPL v2+.
|
|
Home Page: http://firehol.org
|
|
|
|
-------------------------------------------------------------------------
|
|
Get notified of new FireHOL releases by subscribing to the mailing list:
|
|
http://lists.firehol.org/mailman/listinfo/firehol-support/
|
|
-------------------------------------------------------------------------
|
|
|
|
EOF
|
|
}
|
|
|
|
|
|
help() {
|
|
|
|
$CAT_CMD <<EOFHELP
|
|
Modes:
|
|
|
|
${PROGRAM_FILE} boot [seconds]
|
|
|
|
- default 'seconds' is 300 (run every 5 mins)
|
|
|
|
Runs LinkBalancer in a screen session in the background.
|
|
To see it running run: 'screen -r link-balancer'
|
|
To exit screen without stopping it, press: Control-a then d.
|
|
|
|
|
|
${PROGRAM_FILE} loop [seconds]
|
|
|
|
like above, but run in foreground, not in a screen session.
|
|
|
|
|
|
${PROGRAM_FILE} -h|--help
|
|
|
|
Present this help file.
|
|
|
|
|
|
${PROGRAM_FILE} [-t|--test] [-f|--fast] [-d|--debug]
|
|
|
|
-t or --test
|
|
|
|
Do not alter anything on the system.
|
|
Just show what would have been done.
|
|
|
|
-f or --fast
|
|
|
|
Assume all gateways are up, if their interfaces are up.
|
|
This should be run from '/etc/ppp/ip-down' to quickly
|
|
restore the default gateways of the system.
|
|
|
|
-d or --debug
|
|
|
|
At the end of the execution, output all temporary
|
|
files.
|
|
|
|
EOFHELP
|
|
|
|
$CAT_CMD >"${LB_CONFIG}.example" <<EOFCONFIG
|
|
# Link Balancer Configuration file
|
|
|
|
# default is IPv4.
|
|
# You can change the default to IPv6 by setting this to "6":
|
|
LB_DEFAULT_IPV="4"
|
|
|
|
# You can also specify IPv4 or IPv6 for gateways, tables and policy by
|
|
# using gateway4 gateway6 table4 table6 policy4 policy6
|
|
# If you use these without the number, the default above will be used.
|
|
# You can also run 'ipv4 gateway ...' or 'ipv4 gateway ...'
|
|
# for all these statements.
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# define all the gateways
|
|
|
|
# TEMPLATE:
|
|
#
|
|
# gateway GATEWAY_NAME dev DEVICE [gw "IPs"] [src "IPs"] [check METHOD "IPs" ]
|
|
#
|
|
# - DEVICE is the interface via which the gateway is accessible
|
|
# - gw IP is autodetected if not given
|
|
# - src IP is autodetected if not given
|
|
# - METHODs: ping traceroute alwayson (default is ping)
|
|
# - when check IPs is empty the gw IPs are used
|
|
#
|
|
# In general
|
|
# - for point to point PPP interfaces everything is autodetected
|
|
# - for point to lan PPP interfaces, you have to give gw IP and src IP
|
|
# - for eth devices you have to specify the gw IP
|
|
#
|
|
# Hint: If you use PPP devices, specify in the peers file of pppd the
|
|
# unit number you want it to use. This way, you will know that, for example,
|
|
# you office VPN is always at ppp14.
|
|
# Another way is to rename the ppp device in /etc/ppp/ip-up, so that
|
|
# instead of having 'ppp14', you will have the interface as 'work1'.
|
|
#
|
|
# examples:
|
|
|
|
# wan providers
|
|
gateway dsl1 dev ppp11
|
|
gateway dsl2 dev eth3 gw 2.2.2.2
|
|
gateway dsl3 dev eth4 gw 3.3.3.3
|
|
|
|
# dual path office VPN
|
|
gateway work1 dev ppp14 check 172.16.1.2
|
|
gateway work2 dev tun0 check 172.16.1.4
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# define all the routing tables
|
|
|
|
# Tables can be defined using numbers from 1 to 252.
|
|
# Do not use tables 0, 253, 254 and 255. They are system tables.
|
|
|
|
# You can give names to tables by editing /etc/iproute2/rt_tables
|
|
# If you give names, you can use them here.
|
|
|
|
# TEMPLATE:
|
|
#
|
|
# table NAME [from ORIGIN_TABLE_NAME] [nodefault]
|
|
#
|
|
# - NAME and ORIGIN_TABLE_NAME can either be IDs or names
|
|
# - The default ORIGIN_TABLE_NAME is: main
|
|
# - nodefault means in case the table is left without a default gateway,
|
|
# do not copy the default gateway of the ORIGIN_TABLE_NAME
|
|
#
|
|
# then for each table, define the default gateways you want:
|
|
#
|
|
# default via GATEWAY_NAME [weight 0-250]
|
|
#
|
|
# - GATEWAY_NAME is the name of the gateway as given in the gateways section.
|
|
# - default weight is 100. Weights can be given as 0 to 255.
|
|
# - weight 0 is special. It means don't use this unless there is no
|
|
# other gateway available.
|
|
#
|
|
# you can add as many default gateways per table, as you need.
|
|
#
|
|
# You should define one table per gateway and one for load-balancing the
|
|
# gateways. You need one table per gateway, so that if you receive requests
|
|
# from the gateways, you will respond to these requests via the same path.
|
|
#
|
|
# examples:
|
|
|
|
# one table per WAN gateway
|
|
table dsl1
|
|
default via dsl1
|
|
|
|
table dsl2
|
|
default via dsl2
|
|
|
|
table dsl3
|
|
default via dsl3
|
|
|
|
# this is the main system routing table
|
|
table main
|
|
default via dsl1 weigth 250
|
|
default via dsl2 weight 150
|
|
default via dsl3 weight 50
|
|
|
|
|
|
# one table per WORK gateway
|
|
table work1 from WORK # we copy WORK here, not 'main'
|
|
default via work1
|
|
|
|
table work2 from WORK # we copy WORK here, not 'main'
|
|
default via work2
|
|
|
|
# this is based on 'main'
|
|
# but we don't need its default gateway
|
|
table WORK nodefault
|
|
default via work1 weight 100
|
|
default via work2 weight 50
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# define rules for selecting tables
|
|
|
|
policy
|
|
|
|
# define a mark for each gateway table.
|
|
# this makes packets originated from them to be routed back to them
|
|
connmark 0x1 table dsl1
|
|
connmark 0x2 table dsl2
|
|
connmark 0x3 table dsl3
|
|
connmark 0x11 table work1
|
|
connmark 0x12 table work2
|
|
|
|
# You will have to add these connmark rules at the top of your firehol.conf:
|
|
# connmark 0x1 interface ppp11
|
|
# connmark 0x2 interface eth3
|
|
# connmark 0x3 interface eth4
|
|
# connmark 0x11 interface ppp14
|
|
# connmark 0x12 interface tun0
|
|
|
|
# Now you can add policy routing rules.
|
|
# TEMPLATE:
|
|
# rules [not] [from|src IPs] [to|dst IPs] [mark X] [tos X] table TABLE_NAME
|
|
#
|
|
# example:
|
|
|
|
# clients at 192.168.1.0 use only dsl1
|
|
rules src 192.168.1.0/24 table dsl1
|
|
|
|
# web server at 1.2.3.4 is routed only via dsl2
|
|
rules dst 1.2.3.4 table dsl2
|
|
|
|
# You can use LinkBalancer to find all the IP address space of your upstream
|
|
# providers:
|
|
# Run:
|
|
#
|
|
# ${PROGRAM_FILE} asips ONE_IP_OF_YOUR_PROVIDER
|
|
#
|
|
# LinkBalancer will query RIPE to find all the IPs of your provider.
|
|
# So you can add:
|
|
|
|
rules dst IPS_OF_PROVIDER_1 table dsl1
|
|
rules dst IPS_OF_PROVIDER_2 table dsl2
|
|
rules dst IPS_OF_PROVIDER_3 table dsl3
|
|
|
|
# You can also have all the IPs in separate files:
|
|
# Run:
|
|
#
|
|
# ${PROGRAM_FILE} asips ONE_IP_OF_YOUR_PROVIDER_1 >/etc/firehol/PROVIDER1_IPS
|
|
#
|
|
# Then:
|
|
rules dst loadfile PROVIDER1_IPS table dsl1
|
|
|
|
|
|
# Last, you may want to route local traffic to the proper table.
|
|
# This is not required through.
|
|
# It will only help if you run daemons that bind to specific IPs
|
|
# and you want them to be routed based on these IPs.
|
|
|
|
rules src gw-src-ips dsl1 table dsl1
|
|
rules src gw-src-ips dsl2 table dsl2
|
|
rules src gw-src-ips dsl3 table dsl3
|
|
rules src gw-src-ips work1 table work1
|
|
rules src gw-src-ips work2 table work2
|
|
|
|
|
|
EOFCONFIG
|
|
|
|
echo >&2 "Saved ${LB_CONFIG}.example for your convinience..."
|
|
|
|
}
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# options
|
|
|
|
emit_version
|
|
|
|
while [ ! -z "$1" ]
|
|
do
|
|
case "$1" in
|
|
-h|--help)
|
|
help
|
|
exit 0
|
|
;;
|
|
|
|
-t|--test)
|
|
DRY_RUN=1
|
|
;;
|
|
|
|
-f|--fast)
|
|
FORCE_ALWAYSON=1
|
|
;;
|
|
|
|
-d|--debug)
|
|
DEBUG_ALL_DATA=1
|
|
;;
|
|
|
|
asips)
|
|
shift
|
|
asips "${@}"
|
|
LB_RESULT_CODE=$?
|
|
exit ${LB_RESULT_CODE}
|
|
;;
|
|
|
|
*)
|
|
echo >&2 "Unknown option '$1'"
|
|
exit 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
syslog "Started"
|
|
|
|
if [ ! -f "${LB_CONFIG}" ]
|
|
then
|
|
echo >&2 "Cannot find config file '${LB_CONFIG}'"
|
|
exit 1
|
|
fi
|
|
|
|
printf >&2 "\n\n###############################################################################\n"
|
|
printf >&2 "PROCESSING CONFIGURATION\n"
|
|
|
|
# process the script
|
|
enable -n trap # Disable the trap buildin shell command.
|
|
{ source "${LB_CONFIG}"; }
|
|
ret=$?
|
|
enable trap
|
|
if [ $ret -ne 0 ]
|
|
then
|
|
error "Preprocessing of '${LB_CONFIG}' failed with code $ret. No changes made to your system."
|
|
exit 1
|
|
fi
|
|
|
|
# apply the changes
|
|
printf >&2 "\n\n###############################################################################\n"
|
|
printf >&2 "APPLYING CHANGES\n"
|
|
|
|
test -f "${LB_DIR}/tables.4" && finalize_tables 4
|
|
test -f "${LB_DIR}/tables.6" && finalize_tables 6
|
|
test ${LB_DO_RULES_IPV4} -eq 1 && finalize_rules 4
|
|
test ${LB_DO_RULES_IPV6} -eq 1 && finalize_rules 6
|
|
LB_RESULT_CODE=0
|
|
|
|
# all done!
|
|
echo >&2
|
|
test ! -z "${!LB_ALTERED[*]}" && warning "Altered: ${!LB_ALTERED[@]}"
|
|
|
|
# No need to cleanup
|
|
# The trap will cleanup the temporary directory
|