datadunia
133 lines
3.8 KiB
Bash
133 lines
3.8 KiB
Bash
#!/bin/bash
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# wg-sync-policy.sh — Reads wg0.conf, validates, generates policy.json atomically
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# Fixed: IP validation, atomic write, proper locking, error handling
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "${SCRIPT_DIR}/wg-policy-lib.sh"
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# ============================================================
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# MAIN
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# ============================================================
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main() {
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log_info "Starting policy sync..."
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# Validate prerequisites
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if [[ ! -f "$WG_CONF" ]]; then
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log_error "WireGuard config not found: $WG_CONF"
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exit 1
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fi
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if ! command -v jq &>/dev/null; then
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log_error "jq is required but not installed"
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exit 1
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fi
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# Acquire lock
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acquire_lock
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trap 'release_lock' EXIT
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# Backup current policy
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backup_policy
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# Temporary file for atomic write
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local tmp_policy
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tmp_policy="$(mktemp /tmp/wg-policy.XXXXXX)"
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trap 'rm -f "$tmp_policy" 2>/dev/null; release_lock' EXIT
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echo '{"clients":{}}' > "$tmp_policy"
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# Parse peers from wg0.conf
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# AWK extracts IP and #Access comment per [Peer] block
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local parse_errors=0
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awk '
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BEGIN { RS="\n\\[Peer\\]\n"; FS="\n" }
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NR>1 {
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ip=""; access=""
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for(i=1;i<=NF;i++){
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if($i ~ /^AllowedIPs/) {
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split($i,a," = ")
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gsub(/ /,"",a[2])
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split(a[2],b,",")
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split(b[1],c,"/")
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ip=c[1]
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}
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if($i ~ /^#Access/) {
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sub(/^#Access[ \t]+/, "", $i)
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access=$i
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}
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}
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if(ip!="" && ip!="0.0.0.0" && ip!="::") {
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printf "%s|%s\n", ip, access
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}
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}
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' "$WG_CONF" | while IFS="|" read -r ip access_string; do
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# === VALIDATE CLIENT IP ===
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if ! validate_cidr "$ip"; then
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log_warn "Invalid client IP skipped: '$ip'"
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(( parse_errors++ )) || true
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continue
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fi
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# === PARSE AND VALIDATE ACCESS TARGETS ===
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local ACCESS_JSON="[]"
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if [[ -n "$access_string" ]]; then
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# Split by ; and , then validate each entry
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local valid_targets=()
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local IFS_OLD="$IFS"
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IFS=';,'
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read -ra targets <<< "$access_string"
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IFS="$IFS_OLD"
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for target in "${targets[@]}"; do
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# Trim whitespace
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target="$(echo "$target" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
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[[ -z "$target" ]] && continue
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if validate_cidr "$target"; then
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valid_targets+=("$target")
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else
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log_warn "Invalid access target skipped for $ip: '$target'"
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(( parse_errors++ )) || true
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fi
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done
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if (( ${#valid_targets[@]} > 0 )); then
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ACCESS_JSON=$(printf '%s\n' "${valid_targets[@]}" | jq -R . | jq -s .)
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fi
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fi
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# Write to temp policy
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jq --arg ip "$ip" --argjson access "$ACCESS_JSON" \
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'.clients[$ip] = {"name": $ip, "access": $access}' \
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"$tmp_policy" > "${tmp_policy}.tmp" && mv "${tmp_policy}.tmp" "$tmp_policy"
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done
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# Validate JSON before atomic move
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if ! jq empty "$tmp_policy" 2>/dev/null; then
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log_error "Generated JSON is invalid, aborting. Check $tmp_policy"
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exit 1
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fi
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# Atomic move (same filesystem = atomic rename)
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mv -f "$tmp_policy" "$POLICY_FILE"
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log_info "policy.json updated successfully"
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if (( parse_errors > 0 )); then
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log_warn "$parse_errors validation errors encountered (see warnings above)"
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fi
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local client_count
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client_count=$(jq '(.clients // {}) | length' "$POLICY_FILE")
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log_info "Total clients in policy: $client_count"
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}
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main "$@"
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