datadunia
b5c9b180dc
- Rewrite wg-policy-lib.sh: replace ipset functions with nft helpers, add backup_nftables() - Rewrite wg-policy-engine.sh: generate nft ruleset file, atomic load via nft -f, rollback support - Simplify wg-policy-cleanup.sh: single nft delete table inet wg_policy - Update wg-policy-ctl: nft commands for rules/ipset/stats/backup - Rebuild install.sh: nftables dependency, WireGuard pre-check, PostUp/PostDown auto-integration - Update build.sh/build.bat: match install.sh changes - Update README.md: nftables prerequisites and references
326 lines
8.9 KiB
Bash
326 lines
8.9 KiB
Bash
#!/bin/bash
|
|
# wg-policy-lib.sh — Shared functions for WireGuard Policy Firewall
|
|
# Source this file; do not execute directly.
|
|
|
|
set -euo pipefail
|
|
|
|
# ============================================================
|
|
# CONFIGURATION
|
|
# ============================================================
|
|
readonly WG_IF="${WG_IF:-wg0}"
|
|
readonly NFT_TABLE="wg_policy"
|
|
readonly NFT_TABLE_FULL="inet wg_policy"
|
|
readonly NFT_SET_V4="wg_allowed_v4"
|
|
readonly NFT_SET_V6="wg_allowed_v6"
|
|
readonly POLICY_FILE="/etc/wireguard/policy.json"
|
|
readonly WG_CONF="/etc/wireguard/wg0.conf"
|
|
readonly LOCK_FILE="/var/lock/wg-policy.lock"
|
|
readonly BACKUP_DIR="/etc/wireguard/backups"
|
|
readonly LOG_PREFIX="WG_DROP"
|
|
readonly LOG_RATE="10/minute"
|
|
readonly MAX_RETRY=3
|
|
readonly RETRY_DELAY=2
|
|
readonly DEBOUNCE_SEC=2
|
|
|
|
# ============================================================
|
|
# LOGGING
|
|
# ============================================================
|
|
log_info() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [INFO] $*"; }
|
|
log_warn() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [WARN] $*" >&2; }
|
|
log_error() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [ERROR] $*" >&2; }
|
|
|
|
# ============================================================
|
|
# VALIDATION
|
|
# ============================================================
|
|
|
|
validate_ipv4() {
|
|
local ip="$1"
|
|
if [[ ! "$ip" =~ ^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$ ]]; then
|
|
return 1
|
|
fi
|
|
local IFS='.'
|
|
read -ra octets <<< "$ip"
|
|
for octet in "${octets[@]}"; do
|
|
if [[ "$octet" =~ ^0[0-9] ]]; then
|
|
return 1
|
|
fi
|
|
if (( octet < 0 || octet > 255 )); then
|
|
return 1
|
|
fi
|
|
done
|
|
return 0
|
|
}
|
|
|
|
validate_ipv4_cidr() {
|
|
local cidr="$1"
|
|
local ip prefix
|
|
|
|
if [[ "$cidr" == *"/"* ]]; then
|
|
ip="${cidr%%/*}"
|
|
prefix="${cidr##*/}"
|
|
else
|
|
ip="$cidr"
|
|
prefix="32"
|
|
fi
|
|
|
|
if ! validate_ipv4 "$ip"; then
|
|
return 1
|
|
fi
|
|
|
|
if [[ ! "$prefix" =~ ^[0-9]+$ ]] || (( prefix < 0 || prefix > 32 )); then
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
validate_ipv6() {
|
|
local ip="$1"
|
|
if [[ "$ip" =~ ^([0-9a-fA-F]{0,4}:){2,7}[0-9a-fA-F]{0,4}$ ]] || \
|
|
[[ "$ip" =~ ^::([0-9a-fA-F]{0,4}:){0,5}[0-9a-fA-F]{0,4}$ ]] || \
|
|
[[ "$ip" =~ ^([0-9a-fA-F]{0,4}:){1,7}:$ ]] || \
|
|
[[ "$ip" == "::" ]] || \
|
|
[[ "$ip" == "::1" ]]; then
|
|
return 0
|
|
fi
|
|
return 1
|
|
}
|
|
|
|
validate_ipv6_cidr() {
|
|
local cidr="$1"
|
|
local ip prefix
|
|
|
|
if [[ "$cidr" == *"/"* ]]; then
|
|
ip="${cidr%%/*}"
|
|
prefix="${cidr##*/}"
|
|
else
|
|
ip="$cidr"
|
|
prefix="128"
|
|
fi
|
|
|
|
if ! validate_ipv6 "$ip"; then
|
|
return 1
|
|
fi
|
|
|
|
if [[ ! "$prefix" =~ ^[0-9]+$ ]] || (( prefix < 0 || prefix > 128 )); then
|
|
return 1
|
|
fi
|
|
return 0
|
|
}
|
|
|
|
validate_cidr() {
|
|
local cidr="$1"
|
|
if [[ "$cidr" == *":"* ]]; then
|
|
validate_ipv6_cidr "$cidr"
|
|
else
|
|
validate_ipv4_cidr "$cidr"
|
|
fi
|
|
}
|
|
|
|
# ============================================================
|
|
# NFTABLES HELPERS
|
|
# ============================================================
|
|
|
|
has_nft() {
|
|
command -v nft &>/dev/null
|
|
}
|
|
|
|
# ============================================================
|
|
# RETRY MECHANISM
|
|
# ============================================================
|
|
|
|
retry() {
|
|
local max_attempts="${MAX_RETRY}"
|
|
local delay="${RETRY_DELAY}"
|
|
local attempt=1
|
|
local exit_code=0
|
|
|
|
while (( attempt <= max_attempts )); do
|
|
if "$@"; then
|
|
return 0
|
|
fi
|
|
exit_code=$?
|
|
log_warn "Attempt $attempt/$max_attempts failed (exit=$exit_code), retrying in ${delay}s..."
|
|
sleep "$delay"
|
|
(( attempt++ ))
|
|
(( delay *= 2 ))
|
|
done
|
|
|
|
log_error "All $max_attempts attempts failed for: $*"
|
|
return "$exit_code"
|
|
}
|
|
|
|
# ============================================================
|
|
# LOCK MANAGEMENT
|
|
# ============================================================
|
|
|
|
acquire_lock() {
|
|
local lock_fd=200
|
|
eval "exec ${lock_fd}>\"${LOCK_FILE}\""
|
|
if ! flock -x -w 10 "$lock_fd"; then
|
|
log_error "Failed to acquire lock: ${LOCK_FILE} (timeout 10s)"
|
|
return 1
|
|
fi
|
|
log_info "Lock acquired: ${LOCK_FILE}"
|
|
}
|
|
|
|
release_lock() {
|
|
rm -f "$LOCK_FILE" 2>/dev/null || true
|
|
}
|
|
|
|
# ============================================================
|
|
# BACKUP
|
|
# ============================================================
|
|
|
|
backup_policy() {
|
|
mkdir -p "$BACKUP_DIR"
|
|
local timestamp
|
|
timestamp="$(date '+%Y%m%d_%H%M%S')"
|
|
|
|
if [[ -f "$POLICY_FILE" ]]; then
|
|
cp "$POLICY_FILE" "${BACKUP_DIR}/policy_${timestamp}.json"
|
|
log_info "Backup created: ${BACKUP_DIR}/policy_${timestamp}.json"
|
|
fi
|
|
|
|
local count
|
|
count=$(find "$BACKUP_DIR" -name 'policy_*.json' -type f | wc -l)
|
|
if (( count > 50 )); then
|
|
find "$BACKUP_DIR" -name 'policy_*.json' -type f -printf '%T@ %p\n' \
|
|
| sort -n \
|
|
| head -n $(( count - 50 )) \
|
|
| awk '{print $2}' \
|
|
| xargs rm -f
|
|
log_info "Pruned old backups (kept 50)"
|
|
fi
|
|
}
|
|
|
|
backup_nftables() {
|
|
mkdir -p "$BACKUP_DIR"
|
|
local timestamp
|
|
timestamp="$(date '+%Y%m%d_%H%M%S')"
|
|
|
|
if nft list ruleset > "${BACKUP_DIR}/nftables_${timestamp}.rules" 2>/dev/null; then
|
|
log_info "nftables backup: ${BACKUP_DIR}/nftables_${timestamp}.rules"
|
|
fi
|
|
|
|
local count
|
|
count=$(find "$BACKUP_DIR" -name 'nftables_*.rules' -type f | wc -l)
|
|
if (( count > 20 )); then
|
|
find "$BACKUP_DIR" -name 'nftables_*.rules' -type f -printf '%T@ %p\n' \
|
|
| sort -n \
|
|
| head -n $(( count - 20 )) \
|
|
| awk '{print $2}' \
|
|
| xargs rm -f
|
|
fi
|
|
}
|
|
|
|
# ============================================================
|
|
# DETECTION HELPERS
|
|
# ============================================================
|
|
|
|
detect_lan_subnets() {
|
|
ip -o -4 route show scope link \
|
|
| awk '{print $1}' \
|
|
| grep -E '^(10\.|172\.(1[6-9]|2[0-9]|3[01])\.|192\.168\.)' \
|
|
| sort -u
|
|
}
|
|
|
|
detect_wg_subnet() {
|
|
local family="${1:-inet}"
|
|
if [[ "$family" == "inet6" ]]; then
|
|
ip -o -6 addr show "$WG_IF" 2>/dev/null \
|
|
| awk '{print $4; exit}'
|
|
else
|
|
ip -o -4 addr show "$WG_IF" 2>/dev/null \
|
|
| awk '{print $4; exit}'
|
|
fi
|
|
}
|
|
|
|
detect_default_if() {
|
|
local def_if
|
|
def_if=$(ip -4 route ls 2>/dev/null | grep default | grep -Po '(?<=dev )(\S+)' | head -1 || true)
|
|
if [[ -z "$def_if" ]]; then
|
|
echo "eth0"
|
|
else
|
|
echo "$def_if"
|
|
fi
|
|
}
|
|
|
|
# ============================================================
|
|
# HEALTH CHECK
|
|
# ============================================================
|
|
|
|
health_check() {
|
|
local status=0
|
|
local report=""
|
|
|
|
# 1. Check interface exists
|
|
if ip link show "$WG_IF" &>/dev/null; then
|
|
report+="[OK] Interface $WG_IF is UP\n"
|
|
else
|
|
report+="[FAIL] Interface $WG_IF not found\n"
|
|
status=1
|
|
fi
|
|
|
|
# 2. Check policy.json exists and is valid
|
|
if [[ -f "$POLICY_FILE" ]] && jq empty "$POLICY_FILE" 2>/dev/null; then
|
|
local client_count
|
|
client_count=$(jq '(.clients // {}) | length' "$POLICY_FILE")
|
|
report+="[OK] policy.json valid ($client_count clients)\n"
|
|
else
|
|
report+="[FAIL] policy.json missing or corrupt\n"
|
|
status=1
|
|
fi
|
|
|
|
# 3. Check nftables table exists
|
|
if nft list table "$NFT_TABLE_FULL" &>/dev/null; then
|
|
local rule_count
|
|
rule_count=$(nft list chain "$NFT_TABLE_FULL" forward 2>/dev/null | grep -c '^\s*' || echo 0)
|
|
report+="[OK] Table $NFT_TABLE active ($rule_count rules)\n"
|
|
else
|
|
report+="[WARN] Table $NFT_TABLE not found\n"
|
|
status=1
|
|
fi
|
|
|
|
# 4. Check forward chain exists in table
|
|
if nft list chain "$NFT_TABLE_FULL" forward &>/dev/null; then
|
|
report+="[OK] Forward chain exists in $NFT_TABLE\n"
|
|
else
|
|
report+="[WARN] Forward chain not found in $NFT_TABLE\n"
|
|
status=1
|
|
fi
|
|
|
|
# 5. Check nftables sets
|
|
for set_name in "$NFT_SET_V4" "$NFT_SET_V6"; do
|
|
if nft list set "$NFT_TABLE_FULL" "$set_name" &>/dev/null; then
|
|
local entry_count
|
|
entry_count=$(nft list set "$NFT_TABLE_FULL" "$set_name" 2>/dev/null | grep -c '^\s*' || echo 0)
|
|
report+="[OK] Set $set_name active ($entry_count entries)\n"
|
|
else
|
|
report+="[INFO] Set $set_name not created (may not be needed)\n"
|
|
fi
|
|
done
|
|
|
|
# 6. Check watcher service
|
|
if systemctl is-active --quiet wg-policy.service 2>/dev/null; then
|
|
report+="[OK] wg-policy.service is running\n"
|
|
else
|
|
report+="[INFO] wg-policy.service not running\n"
|
|
fi
|
|
|
|
# 7. Check lock file not stale
|
|
if [[ -f "$LOCK_FILE" ]]; then
|
|
local lock_age
|
|
lock_age=$(( $(date +%s) - $(stat -c %Y "$LOCK_FILE" 2>/dev/null || echo 0) ))
|
|
if (( lock_age > 300 )); then
|
|
report+="[WARN] Stale lock file (${lock_age}s old)\n"
|
|
else
|
|
report+="[OK] Lock file age: ${lock_age}s\n"
|
|
fi
|
|
else
|
|
report+="[OK] No stale lock file\n"
|
|
fi
|
|
|
|
echo -e "$report"
|
|
return $status
|
|
}
|