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0c3d484307e412e8f425b516ad7341077da39166
hackacad/usr/local/share/bastille/network.sh
tschettervictor 0c3d484307 Implement -m switch for optional static MAC
2025-01-01 21:15:53 -07:00

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#!/bin/sh
#
# Copyright (c) 2018-2024, Christer Edwards <christer.edwards@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# * 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.
#
# * Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
. /usr/local/share/bastille/common.sh
. /usr/local/etc/bastille/bastille.conf
usage() {
error_notify "Usage: bastille network [option(s)] TARGET [remove|add] INTERFACE [IP_ADDRESS]"
cat << EOF
Options:
-b | --bridge Add a bridged VNET interface to an existing jail.
-f | --force Stop the jail if it is running.
-m | --static-mac Generate a static MAC address for the interface.
-s | --start Start jail on completion.
-v | --vnet Add a VNET interface to an existing jail.
EOF
exit 1
}
# Handle options.
BRIDGE_VNET_JAIL=0
FORCE=0
STATIC_MAC=0
START=0
VNET_JAIL=0
while [ "$#" -gt 0 ]; do
case "${1}" in
-h|--help|help)
usage
;;
-b|-B|--bridge)
BRIDGE_VNET_JAIL=1
shift
;;
-f|--force)
FORCE=1
shift
;;
-m|--static-mac)
STATIC_MAC=1
shift
;;
-s|--start)
START=1
shift
;;
-v|-V|--vnet)
VNET_JAIL=1
shift
;;
-*)
for _o in $(echo ${1} | sed 's/-//g' | fold -w1); do
case ${_o} in
b|B) BRIDGE_VNET_JAIL=1 ;;
f) FORCE=1 ;;
m) STATIC_MAC=1 ;;
s) START=1 ;;
v|V) VNET_JAIL=1 ;;
*) error_exit "Unknown Option: \"${1}\"" ;;
esac
done
shift
;;
*)
break
;;
esac
done
TARGET="${1}"
ACTION="${2}"
INTERFACE="${3}"
IP="${4}"
if [ "${ACTION}" = "add" ]; then
if [ "${VNET_JAIL}" -eq 1 ] && [ "${BRIDGE_VNET_JAIL}" -eq 1 ]; then
error_notify "Error: [-v|-V|--vnet] and [-b|-B|--bridge] cannot both be set."
usage
elif [ "${VNET_JAIL}" -eq 0 ] && [ "${BRIDGE_VNET_JAIL}" -eq 0 ]; then
error_notify "Error: [-v|-V|--vnet] or [-b|-B|--bridge] must be set."
usage
fi
fi
if [ "$#" -lt 2 ] || [ "$#" -gt 4 ]; then
usage
fi
bastille_root_check
set_target_single "${TARGET}"
check_target_is_stopped "${TARGET}" || if [ "${FORCE}" -eq 1 ]; then
bastille stop "${TARGET}"
else
error_notify "Jail is running."
error_exit "Use [-f|--force] to force stop the jail."
fi
validate_ip() {
local ip="${1}"
local ip6="$( echo "${ip}" 2>/dev/null | grep -E '^(([a-fA-F0-9:]+$)|([a-fA-F0-9:]+\/[0-9]{1,3}$)|SLAAC)' )"
if [ -n "${ip6}" ]; then
info "Valid: (${ip6})."
else
local IFS
if echo "${ip}" 2>/dev/null | grep -Eq '^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\/([0-9]|[1-2][0-9]|3[0-2]))?$'; then
TEST_IP=$(echo "${ip}" | cut -d / -f1)
IFS=.
set ${TEST_IP}
for quad in 1 2 3 4; do
if eval [ \$$quad -gt 255 ]; then
error_exit "Invalid: (${TEST_IP})"
fi
done
info "Valid: (${ip})."
else
error_exit "Invalid: (${ip})."
fi
fi
}
validate_netif() {
local _interface="${1}"
if ifconfig -l | grep -qwo ${_interface}; then
info "Valid: (${_interface})."
else
error_exit "Invalid: (${_interface})."
fi
}
validate_netconf() {
if [ -n "${bastille_network_loopback}" ] && [ -n "${bastille_network_shared}" ]; then
error_exit "Invalid network configuration."
fi
}
check_interface_added() {
local _jailname="${1}"
local _if="${2}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
if grep -o "${_if}" "${_jail_config}"; then
return 0
else
return 1
fi
}
add_vnet_interface_block() {
local _jailname="${1}"
local _if="${2}"
local _ip="${3}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_count="$(grep -Eo 'bastille[0-9]+' ${bastille_jailsdir}/*/jail.conf | sort -u | wc -l | awk '{print $1}')"
local _if_vnet_count="$(grep -Eo 'vnet[1-9]+' ${_jail_rc_config} | sort -u | wc -l | awk '{print $1}')"
local _if_vnet="vnet$((_if_vnet_count + 1))"
local num_range=$((_if_count + 1))
for _num in $(seq 0 "${num_range}"); do
if ! grep -Eq "bastille${_num}" "${bastille_jailsdir}"/*/jail.conf; then
local uniq_epair="bastille${_num}"
break
fi
done
generate_static_mac "${_jailname}" "${_if}"
sed -i '' "s|}||" "${_jail_config}"
## generate config
cat << EOF >> "${_jail_config}"
## ${uniq_epair} interface
vnet.interface += e0b_${uniq_epair};
exec.prestart += "jib addm ${uniq_epair} ${_if}";
exec.prestart += "ifconfig e0a_${uniq_epair} description \"vnet host interface for Bastille jail ${_jailname}\"";
exec.poststop += "jib destroy ${uniq_epair}";
}
EOF
# add config to /etc/rc.conf
sysrc -f "${_jail_rc_config}" ifconfig_e0b_${uniq_epair}_name="${_if_vnet}"
# If 0.0.0.0 set DHCP, else set static IP address
if [ "${_ip}" = "0.0.0.0" ]; then
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}="SYNCDHCP"
else
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}=" inet ${_ip} "
fi
info "[${_jailname}]:"
echo "Added interface: \"${_if}\""
}
add_vnet_interface_block_static_mac() {
local _jailname="${1}"
local _if="${2}"
local _ip="${3}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_count="$(grep -Eo 'bastille[0-9]+' ${bastille_jailsdir}/*/jail.conf | sort -u | wc -l | awk '{print $1}')"
local _if_vnet_count="$(grep -Eo 'vnet[1-9]+' ${_jail_rc_config} | sort -u | wc -l | awk '{print $1}')"
local _if_vnet="vnet$((_if_vnet_count + 1))"
local num_range=$((_if_count + 1))
for _num in $(seq 0 "${num_range}"); do
if ! grep -Eq "bastille${_num}" "${bastille_jailsdir}"/*/jail.conf; then
local uniq_epair="bastille${_num}"
break
fi
done
generate_static_mac "${_jailname}" "${_if}"
sed -i '' "s|}||" "${_jail_config}"
## generate config
cat << EOF >> "${_jail_config}"
## ${uniq_epair} interface
vnet.interface += e0b_${uniq_epair};
exec.prestart += "jib addm ${uniq_epair} ${_if}";
exec.prestart += "ifconfig e0a_${uniq_epair} ether ${macaddr}a";
exec.prestart += "ifconfig e0b_${uniq_epair} ether ${macaddr}b";
exec.prestart += "ifconfig e0a_${uniq_epair} description \"vnet host interface for Bastille jail ${_jailname}\"";
exec.poststop += "jib destroy ${uniq_epair}";
}
EOF
# add config to /etc/rc.conf
sysrc -f "${_jail_rc_config}" ifconfig_e0b_${uniq_epair}_name="${_if_vnet}"
# If 0.0.0.0 set DHCP, else set static IP address
if [ "${_ip}" = "0.0.0.0" ]; then
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}="SYNCDHCP"
else
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}=" inet ${_ip} "
fi
info "[${_jailname}]:"
echo "Added interface: \"${_if}\""
}
add_bridge_interface_block() {
local _jailname="${1}"
local _if="${2}"
local _ip="${3}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_count="$(grep -Eo 'epair[0-9]+' ${bastille_jailsdir}/*/jail.conf | sort -u | wc -l | awk '{print $1}')"
local _if_vnet_count="$(grep -Eo 'vnet[1-9]+' ${_jail_rc_config} | sort -u | wc -l | awk '{print $1}')"
local _if_vnet=vnet$((_if_vnet_count + 1))
local num_range=$((_if_count + 1))
for _num in $(seq 0 "${num_range}"); do
if ! grep -Eq "epair${_num}" "${bastille_jailsdir}"/*/jail.conf; then
local uniq_epair="${_num}"
break
fi
done
generate_static_mac "${_jailname}" "${_if}"
sed -i '' "s|}||" "${_jail_config}"
## generate config
cat << EOF >> "${_jail_config}"
## epair${uniq_epair} interface
vnet.interface += e${uniq_epair}b_${_jailname};
exec.prestart += "ifconfig epair${uniq_epair} create";
exec.prestart += "ifconfig ${_if} addm epair${uniq_epair}a";
exec.prestart += "ifconfig epair${uniq_epair}a up name e${uniq_epair}a_${_jailname}";
exec.prestart += "ifconfig epair${uniq_epair}b up name e${uniq_epair}b_${_jailname}";
exec.poststop += "ifconfig ${_if} deletem e${uniq_epair}a_${_jailname}";
exec.poststop += "ifconfig e${uniq_epair}a_${_jailname} destroy";
}
EOF
# Add config to /etc/rc.conf
sysrc -f "${_jail_rc_config}" ifconfig_e${uniq_epair}b_${_jailname}_name="${_if_vnet}"
# If 0.0.0.0 set DHCP, else set static IP address
if [ "${_ip}" = "0.0.0.0" ]; then
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}="SYNCDHCP"
else
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}=" inet ${_ip} "
fi
info "[${_jailname}]:"
echo "Added interface: \"${_if}\""
}
add_bridge_interface_block_static_mac() {
local _jailname="${1}"
local _if="${2}"
local _ip="${3}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_count="$(grep -Eo 'epair[0-9]+' ${bastille_jailsdir}/*/jail.conf | sort -u | wc -l | awk '{print $1}')"
local _if_vnet_count="$(grep -Eo 'vnet[1-9]+' ${_jail_rc_config} | sort -u | wc -l | awk '{print $1}')"
local _if_vnet=vnet$((_if_vnet_count + 1))
local num_range=$((_if_count + 1))
for _num in $(seq 0 "${num_range}"); do
if ! grep -Eq "epair${_num}" "${bastille_jailsdir}"/*/jail.conf; then
local uniq_epair="${_num}"
break
fi
done
generate_static_mac "${_jailname}" "${_if}"
sed -i '' "s|}||" "${_jail_config}"
## generate config
cat << EOF >> "${_jail_config}"
## epair${uniq_epair} interface
vnet.interface += e${uniq_epair}b_${_jailname};
exec.prestart += "ifconfig epair${uniq_epair} create";
exec.prestart += "ifconfig ${_if} addm epair${uniq_epair}a";
exec.prestart += "ifconfig epair${uniq_epair}a up name e${uniq_epair}a_${_jailname}";
exec.prestart += "ifconfig epair${uniq_epair}b up name e${uniq_epair}b_${_jailname}";
exec.prestart += "ifconfig e${uniq_epair}a_${_jailname} ether ${macaddr}a";
exec.prestart += "ifconfig e${uniq_epair}b_${_jailname} ether ${macaddr}b";
exec.poststop += "ifconfig ${_if} deletem e${uniq_epair}a_${_jailname}";
exec.poststop += "ifconfig e${uniq_epair}a_${_jailname} destroy";
}
EOF
# Add config to /etc/rc.conf
sysrc -f "${_jail_rc_config}" ifconfig_e${uniq_epair}b_${_jailname}_name="${_if_vnet}"
# If 0.0.0.0 set DHCP, else set static IP address
if [ "${_ip}" = "0.0.0.0" ]; then
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}="SYNCDHCP"
else
sysrc -f "${_jail_rc_config}" ifconfig_${_if_vnet}=" inet ${_ip} "
fi
info "[${_jailname}]:"
echo "Added interface: \"${_if}\""
}
remove_vnet_interface_block() {
local _jailname="${1}"
local _if="${2}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_jail="$(grep "${_if}" ${_jail_config} | grep -Eo 'bastille[0-9]+')"
if grep -o "${_if_jail}" ${_jail_rc_config}; then
local _if_vnet="$(grep "${_if_jail}" ${_jail_rc_config} | grep -Eo 'vnet[0-9]+')"
else
error_exit "Interface not found: ${_if_jail}"
fi
# Do not allow removing default vnet0 interface
if [ "${_if_vnet}" = "vnet0" ]; then
error_exit "Default interface cannot be removed."
fi
# Avoid removing entire file contents if variables aren't set for some reason
if [ -z "${_if_jail}" ]; then
error_exit "Error: Could not find specifed interfaces. Exiting..."
fi
# Remove interface from jail.conf
if [ -n "${_if_jail}" ]; then
sed -i '' "s|.*${_if_jail}.*||" "${_jail_config}"
sed -i '' '/^$/d' "${_jail_config}"
else
error_exit "Failed to remove interface from jail.conf"
fi
# Remove interface from /etc/rc.conf
if [ -n "${_if_vnet}" ] && echo ${_if_vnet} 2>/dev/null | grep -Eo 'vnet[0-9]+'; then
sed -i '' "s|.*${_if_vnet}.*||" "${_jail_rc_config}"
sed -i '' '/^$/d' "${_jail_rc_config}"
else
error_exit "Failed to remove interface from /etc/rc.conf"
fi
info "[${_jailname}]:"
echo "Removed interface: \"${_if}\""
}
remove_bridge_interface_block() {
local _jailname="${1}"
local _if="${2}"
local _jail_config="${bastille_jailsdir}/${_jailname}/jail.conf"
local _jail_rc_config="${bastille_jailsdir}/${_jailname}/root/etc/rc.conf"
local _if_epair="$(grep "${_if}" ${_jail_config} | grep -Eo 'epair[0-9]+')"
local _if_epaira_name="$(grep "${_if_epair}" ${_jail_config} | grep -Eo "e[0-9]+a_${_jailname}")"
local _if_epairb_name="$(grep "${_if_epair}" ${_jail_config} | grep -Eo "e[0-9]+b_${_jailname}")"
if grep -o "${_if_epairb_name}" ${_jail_rc_config}; then
local _if_vnet="$(grep "${_if_epairb_name}" ${_jail_rc_config} | grep -Eo 'vnet[0-9]+')"
else
error_exit "Interface not found: ${_if_epair_name}"
fi
# Do not allow removing default vnet0 interface
if [ "${_if_vnet}" = "vnet0" ]; then
error_exit "Default interface cannot be removed."
fi
# Avoid removing entire file contents if variables aren't set for some reason
if [ -z "${_if_epair}" ] || [ -z "${_if_epaira_name}" ] || [ -z "${_if_epairb_name}" ] || [ -z "${_if_vnet}" ]; then
error_exit "Error: Could not find specifed interfaces. Exiting..."
fi
# Remove interface from jail.conf
if [ -n "${_if_epair}" ] && [ -n "${_if_epaira_name}" ] && [ -n "${_if_epairb_name}" ] && [ -n "${_if_vnet}" ]; then
sed -i '' "s|.*${_if_epair}.*||" "${_jail_config}"
sed -i '' "s|.*${_if_epaira_name}.*||" "${_jail_config}"
sed -i '' "s|.*${_if_epairb_name}.*||" "${_jail_config}"
sed -i '' '/^$/d' "${_jail_config}"
else
error_exit "Failed to remove interface from jail.conf"
fi
# Remove interface from /etc/rc.conf
if [ -n "${_if_vnet}" ] && echo ${_if_vnet} 2>/dev/null | grep -Eo 'vnet[0-9]+'; then
sed -i '' "s|ifconfig.*${_if_vnet}.*||" "${_jail_rc_config}"
sed -i '' '/^$/d' "${_jail_rc_config}"
else
error_exit "Failed to remove interface from /etc/rc.conf"
fi
info "[${_jailname}]:"
echo "Removed interface: \"${_if}\""
}
case "${ACTION}" in
add)
validate_netconf
validate_netif "${INTERFACE}"
if check_interface_added "${TARGET}" "${INTERFACE}"; then
error_exit "Interface is already added: \"${INTERFACE}\""
fi
if [ -z "${IP}" ] || [ "${IP}" = "0.0.0.0" ]; then
IP="SYNCDHCP"
else
validate_ip "${IP}"
fi
if [ "${VNET_JAIL}" -eq 1 ]; then
if ifconfig | grep "${INTERFACE}" | grep -q bridge; then
error_exit "\"${INTERFACE}\" is a bridge interface."
else
if [ "${STATIC_MAC}" -eq 1 ]; then
add_vnet_interface_block_static_mac "${TARGET}" "${INTERFACE}" "${IP}"
else
add_vnet_interface_block "${TARGET}" "${INTERFACE}" "${IP}"
fi
if [ "${START}" -eq 1 ]; then
bastille start "${TARGET}"
fi
fi
elif [ "${BRIDGE_VNET_JAIL}" -eq 1 ]; then
if ! ifconfig | grep "${INTERFACE}" | grep -q bridge; then
error_exit "\"${INTERFACE}\" is not a bridge interface."
else
if [ "${STATIC_MAC}" -eq 1 ]; then
add_bridge_interface_block_static_mac "${TARGET}" "${INTERFACE}" "${IP}"
else
add_bridge_interface_block "${TARGET}" "${INTERFACE}" "${IP}"
fi
if [ "${START}" -eq 1 ]; then
bastille start "${TARGET}"
fi
fi
fi
;;
remove|delete)
check_interface_added "${TARGET}" "${INTERFACE}" || error_exit "Interface not found in jail.conf: \"${INTERFACE}\""
validate_netif "${INTERFACE}"
if ! grep -q "${INTERFACE}" ${bastille_jailsdir}/${TARGET}/jail.conf; then
error_exit "Interface not found in jail.conf: \"${INTERFACE}\""
else
if grep "${INTERFACE}" ${bastille_jailsdir}/${TARGET}/jail.conf 2>/dev/null | grep -qE '[[:blank:]]bastille[0-9]+'; then
remove_vnet_interface_block "${TARGET}" "${INTERFACE}"
if [ "${START}" -eq 1 ]; then
bastille start "${TARGET}"
fi
elif grep "${INTERFACE}" ${bastille_jailsdir}/${TARGET}/jail.conf 2>/dev/null | grep -qE '[[:blank:]]epair[0-9]+'; then
remove_bridge_interface_block "${TARGET}" "${INTERFACE}"
if [ "${START}" -eq 1 ]; then
bastille start "${TARGET}"
fi
fi
fi
;;
*)
error_exit "Only [add|remove] are supported."
;;
esac
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