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CanbiZ 2024-11-28 15:44:31 +01:00 committed by GitHub
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commit 44f1c7bd7a
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3 changed files with 0 additions and 196 deletions

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CIDR_LIST=(
192.168.0.0/16
100.64.0.0/10
10.0.0.0/8
)
LOOP_INTERVAL=60
FW_NET_INTERFACE_CHECK_INTERVAL=60
LXC_STATUS_CHECK_INTERVAL=-1
FORCE_UPDATE_INTERVAL=1800

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#!/bin/bash
# =============== CONFIGURATION =============== #
CIDR_LIST=(
192.168.0.0/16
100.64.0.0/10
10.0.0.0/8
)
LOOP_INTERVAL=60
FW_NET_INTERFACE_CHECK_INTERVAL=60
LXC_STATUS_CHECK_INTERVAL=-1
FORCE_UPDATE_INTERVAL=1800
if [ -f "/usr/local/etc/iptag.conf" ]; then
source /usr/local/etc/iptag.conf
fi
# =============== UTIL_FUNCTION =============== #
# Convert IP to integer for comparison
ip_to_int() {
local ip="${1}"
local a b c d
IFS=. read -r a b c d <<< "${ip}"
echo "$((a << 24 | b << 16 | c << 8 | d))"
}
# Check if IP is in CIDR
ip_in_cidr() {
local ip="${1}"
local cidr="${2}"
ip_int=$(ip_to_int "${ip}")
netmask_int=$(ip_to_int "$(ipcalc -b "${cidr}" | grep Broadcast | awk '{print $2}')")
masked_ip_int=$(( "${ip_int}" & "${netmask_int}" ))
[[ ${ip_int} -eq ${masked_ip_int} ]] && return 0 || return 1
}
# Check if IP is in any CIDRs
ip_in_cidrs() {
local ip="${1}"
local cidrs=()
mapfile -t cidrs < <(echo "${2}" | tr ' ' '\n')
for cidr in "${cidrs[@]}"; do
ip_in_cidr "${ip}" "${cidr}" && return 0
done
return 1
}
# Check if IP is valid
is_valid_ipv4() {
local ip=$1
local regex="^([0-9]{1,3}\.){3}[0-9]{1,3}$"
if [[ $ip =~ $regex ]]; then
IFS='.' read -r -a parts <<< "$ip"
for part in "${parts[@]}"; do
if ! [[ $part =~ ^[0-9]+$ ]] || ((part < 0 || part > 255)); then
return 1
fi
done
return 0
else
return 1
fi
}
lxc_status_changed() {
current_lxc_status=$(pct list 2>/dev/null)
if [ "${last_lxc_status}" == "${current_lxc_status}" ]; then
return 1
else
last_lxc_status="${current_lxc_status}"
return 0
fi
}
fw_net_interface_changed() {
current_net_interface=$(ifconfig | grep "^fw")
if [ "${last_net_interface}" == "${current_net_interface}" ]; then
return 1
else
last_net_interface="${current_net_interface}"
return 0
fi
}
# =============== MAIN =============== #
update_lxc_iptags() {
vmid_list=$(pct list 2>/dev/null | grep -v VMID | awk '{print $1}')
for vmid in ${vmid_list}; do
last_tagged_ips=()
current_valid_ips=()
next_tags=()
# Parse current tags
mapfile -t current_tags < <(pct config "${vmid}" | grep tags | awk '{print $2}' | sed 's/;/\n/g')
for current_tag in "${current_tags[@]}"; do
if is_valid_ipv4 "${current_tag}"; then
last_tagged_ips+=("${current_tag}")
continue
fi
next_tags+=("${current_tag}")
done
# Get current IPs
current_ips_full=$(lxc-info -n "${vmid}" -i | awk '{print $2}')
for ip in ${current_ips_full}; do
if is_valid_ipv4 "${ip}" && ip_in_cidrs "${ip}" "${CIDR_LIST[*]}"; then
current_valid_ips+=("${ip}")
next_tags+=("${ip}")
fi
done
# Skip if no ip change
if [[ "$(echo "${last_tagged_ips[@]}" | tr ' ' '\n' | sort -u)" == "$(echo "${current_valid_ips[@]}" | tr ' ' '\n' | sort -u)" ]]; then
echo "Skipping ${vmid} cause ip no changes"
continue
fi
# Set tags
echo "Setting ${vmid} tags from ${current_tags[*]} to ${next_tags[*]}"
pct set "${vmid}" -tags "$(IFS=';'; echo "${next_tags[*]}")"
done
}
check() {
current_time=$(date +%s)
time_since_last_lxc_status_check=$((current_time - last_lxc_status_check_time))
if [[ "${LXC_STATUS_CHECK_INTERVAL}" -gt 0 ]] \
&& [[ "${time_since_last_lxc_status_check}" -ge "${STATUS_CHECK_INTERVAL}" ]]; then
echo "Checking lxc status..."
last_lxc_status_check_time=${current_time}
if lxc_status_changed; then
update_lxc_iptags
last_update_time=${current_time}
return
fi
fi
time_since_last_fw_net_interface_check=$((current_time - last_fw_net_interface_check_time))
if [[ "${FW_NET_INTERFACE_CHECK_INTERVAL}" -gt 0 ]] \
&& [[ "${time_since_last_fw_net_interface_check}" -ge "${FW_NET_INTERFACE_CHECK_INTERVAL}" ]]; then
echo "Checking fw net interface..."
last_fw_net_interface_check_time=${current_time}
if fw_net_interface_changed; then
update_lxc_iptags
last_update_time=${current_time}
return
fi
fi
time_since_last_update=$((current_time - last_update_time))
if [ ${time_since_last_update} -ge ${FORCE_UPDATE_INTERVAL} ]; then
echo "Force updating lxc iptags..."
update_lxc_iptags
last_update_time=${current_time}
return
fi
}
# main: Set the IP tags for all LXC containers
main() {
while true; do
check
sleep "${LOOP_INTERVAL}"
done
}
main

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[Unit]
Description=LXC IP-Tag service
After=network.target
[Service]
Type=simple
ExecStart=/usr/local/bin/iptag
Restart=always
[Install]
WantedBy=multi-user.target