344 lines
No EOL
9.9 KiB
Bash
344 lines
No EOL
9.9 KiB
Bash
#!/usr/bin/env bash
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# ============================================
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# Lifecycle
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# ============================================
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function cmd::watch::on_load() {
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flag::register --type
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flag::register --name
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flag::register --peers
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flag::register --blocked
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flag::register --restricted
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flag::register --allowed
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}
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# ============================================
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# Help
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# ============================================
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function cmd::watch::help() {
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cat <<EOF
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Usage: wgctl watch [options]
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Live monitor of WireGuard activity.
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Shows handshakes from active clients and connection attempts from blocked clients.
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Options:
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--type <type> Filter by device type
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--name <name> Filter by client name
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--peers <list> Filter by comma-separated peer names (used by group watch)
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--allowed Show only allowed client handshakes
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--restricted Show only restricted client events
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--blocked Show only blocked client attempts
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Examples:
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wgctl watch
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wgctl watch --blocked
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wgctl watch --allowed
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wgctl watch --type phone
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wgctl watch --name phone-nuno
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EOF
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}
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# ============================================
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# Helpers
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# ============================================
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function cmd::watch::format_event() {
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local ts="${1:-}" source="${2:-}" client="${3:-}"
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local dest="${4:-}" event="${5:-}" status="${6:-}"
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local event_color
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case "$event" in
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attempt|drop) event_color="\033[1;31m" ;;
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handshake) event_color="\033[1;32m" ;;
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*) event_color="\033[0;37m" ;;
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esac
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local status_color=""
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case "$status" in
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blocked) status_color="\033[1;31m" ;;
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allowed) status_color="\033[1;32m" ;;
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esac
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printf " %-20s %-8s %-22s %-28s ${event_color}%-14s\033[0m ${status_color}%s\033[0m\n" \
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"$ts" "$source" "$client" "${dest:-—}" "$event" "$status"
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}
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function cmd::watch::header() {
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log::section "wgctl — Live Monitor (Ctrl+C to stop)"
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printf "\n %-20s %-8s %-22s %-28s %-14s %s\n" \
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"TIME" "SOURCE" "CLIENT" "DESTINATION/ENDPOINT" "EVENT" "STATUS"
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printf " %s\n\n" "$(printf '─%.0s' {1..105})"
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}
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function cmd::watch::_peer_in_filter() {
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local peer="$1"
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shift
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local peer_set=("$@")
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[[ ${#peer_set[@]} -eq 0 ]] && return 0 # no filter = all pass
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for p in "${peer_set[@]}"; do
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[[ "$p" == "$peer" ]] && return 0
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done
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return 1
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}
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# ============================================
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# Handshake Poller
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# ============================================
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function cmd::watch::poll_handshakes() {
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local filter_name="${1:-}" filter_type="${2:-}"
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local allowed_only="${3:-false}"
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local filter_peers="${4:-}"
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local peer_set=()
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[[ -n "$filter_peers" ]] && IFS=',' read -ra peer_set <<< "$filter_peers"
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while IFS= read -r line; do
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local public_key ts
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public_key=$(echo "$line" | awk '{print $1}')
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ts=$(echo "$line" | awk '{print $2}')
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[[ -z "$ts" || "$ts" == "0" ]] && continue
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# Find client by public key
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local client_name=""
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for conf in "$(ctx::clients)"/*.conf; do
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[[ -f "$conf" ]] || continue
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local name
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name=$(basename "$conf" .conf)
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local key
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key=$(keys::public "$name" 2>/dev/null || echo "")
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if [[ "$key" == "$public_key" ]]; then
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client_name="$name"
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break
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fi
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done
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[[ -z "$client_name" ]] && continue
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# Apply filters
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[[ -n "$filter_name" && "$client_name" != "$filter_name" ]] && continue
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cmd::watch::_peer_in_filter "$client_name" "${peer_set[@]}" || continue
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if [[ -n "$filter_type" ]]; then
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local ip
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ip=$(grep "^Address" "$(ctx::clients)/${client_name}.conf" \
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| awk '{print $3}' | cut -d'/' -f1)
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local subnet
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subnet=$(config::subnet_for "$filter_type")
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string::starts_with "$ip" "$subnet" || continue
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fi
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# Only emit if handshake is new
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local safe_key
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safe_key=$(echo "$public_key" | md5sum | cut -d' ' -f1)
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local prev_ts_file="/tmp/wgctl_hs_${safe_key}"
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local prev_ts="0"
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[[ -f "$prev_ts_file" ]] && prev_ts=$(cat "$prev_ts_file")
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if [[ "$ts" != "$prev_ts" ]]; then
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echo "$ts" > "$prev_ts_file"
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local formatted_ts
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formatted_ts=$(fmt::datetime "$ts")
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local endpoint
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endpoint=$(monitor::endpoint_for_key "$public_key")
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cmd::watch::format_event \
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"$formatted_ts" "wg" "$client_name" "${endpoint:-—}" "handshake" "allowed"
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fi
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done < <(wg show "$(config::interface)" latest-handshakes 2>/dev/null)
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}
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# ============================================
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# Event Tailer
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# ============================================
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function cmd::watch::tail_events() {
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local filter_name="${1:-}" filter_type="${2:-}"
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local blocked_only="${3:-false}" restricted_only="${4:-false}"
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local allowed_only="${5:-false}" filter_peers="${6:-}"
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local peer_set=()
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[[ -n "$filter_peers" ]] && IFS=',' read -ra peer_set <<< "$filter_peers"
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declare -A _WATCH_LAST_ATTEMPT=()
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# Build ip->name map for fw events
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declare -A ip_to_name=()
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local conf_file
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while IFS= read -r conf_file; do
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local name
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name=$(basename "$conf_file" .conf)
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local ip
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ip=$(grep "^Address" "$conf_file" 2>/dev/null | awk '{print $3}' | cut -d'/' -f1)
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[[ -n "$ip" && -n "$name" ]] && ip_to_name["$ip"]="$name"
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done < <(find "$(ctx::clients)" -name "*.conf" 2>/dev/null)
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# Source tracker via temp file (persists across subshell iterations)
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local source_file
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source_file=$(mktemp)
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echo "wg" > "$source_file"
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# Cleanup temp file on exit
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trap "rm -f '$source_file'" EXIT
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tail -f "$(ctx::events_log)" "$(ctx::fw_events_log)" 2>/dev/null \
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[[ -z "$line" ]] && continue
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# Handle tail -f file headers
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if [[ "$line" == "==> "* ]]; then
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if [[ "$line" == *"fw_events"* ]]; then
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echo "fw" > "$source_file"
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else
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echo "wg" > "$source_file"
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fi
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continue
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fi
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local source
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source=$(cat "$source_file")
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if [[ "$source" == "wg" ]]; then
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$allowed_only && continue # wg events are attempts/blocked
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local event_data
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event_data=$(json::parse_event "$line")
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[[ -z "$event_data" ]] && continue
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local ts client endpoint event
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IFS="|" read -r ts client endpoint event <<< "$event_data"
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[[ -n "$filter_name" && "$client" != "$filter_name" ]] && continue
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cmd::watch::_peer_in_filter "$client" "${peer_set[@]}" || continue
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if [[ -n "$filter_type" ]]; then
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local conf
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conf="$(ctx::clients)/${client}.conf"
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[[ -f "$conf" ]] || continue
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local ip
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ip=$(grep "^Address" "$conf" 2>/dev/null | awk '{print $3}' | cut -d'/' -f1)
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local subnet
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subnet=$(config::subnet_for "$filter_type")
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string::starts_with "$ip" "$subnet" || continue
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fi
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$restricted_only && { cmd::list::is_restricted "$client" || continue; }
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# Dedup
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local now
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now=$(date +%s)
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local safe_client="${client//[-.]/_}"
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local last="${_WATCH_LAST_ATTEMPT[$safe_client]:-0}"
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(( now - last < 30 )) && continue
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_WATCH_LAST_ATTEMPT[$safe_client]="$now"
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local formatted_ts
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formatted_ts=$(fmt::datetime_iso "$ts")
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cmd::watch::format_event \
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"$formatted_ts" "wg" "$client" "${endpoint:-—}" "$event" "blocked"
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else
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# FW event
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$allowed_only && continue
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$blocked_only && continue # fw drops aren't "blocked peers" per se
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local fw_data
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fw_data=$(json::parse_fw_event "$line")
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[[ -z "$fw_data" ]] && continue
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local ts src_ip dst_ip dst_port proto
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IFS="|" read -r ts src_ip dst_ip dst_port proto <<< "$fw_data"
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[[ -z "$src_ip" ]] && continue
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local client="${ip_to_name[$src_ip]:-$src_ip}"
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[[ -n "$filter_name" && "$client" != "$filter_name" ]] && continue
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cmd::watch::_peer_in_filter "$client" "${peer_set[@]}" || continue
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if [[ -n "$filter_type" ]]; then
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local peer_client="${ip_to_name[$src_ip]:-}"
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[[ -z "$peer_client" ]] && continue
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local conf
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conf="$(ctx::clients)/${peer_client}.conf"
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[[ -f "$conf" ]] || continue
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local ip
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ip=$(grep "^Address" "$conf" 2>/dev/null | awk '{print $3}' | cut -d'/' -f1)
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local subnet
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subnet=$(config::subnet_for "$filter_type")
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string::starts_with "$ip" "$subnet" || continue
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fi
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local dst_str="${dst_ip:-—}"
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[[ -n "$dst_port" ]] && dst_str="${dst_ip}:${dst_port}/${proto}"
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local formatted_ts
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formatted_ts=$(fmt::datetime_iso "$ts")
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cmd::watch::format_event \
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"$formatted_ts" "fw" "$client" "$dst_str" "drop" "blocked"
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fi
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done
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rm -f "$source_file"
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}
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# ============================================
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# Run
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# ============================================
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function cmd::watch::run() {
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local filter_name="" filter_type="" filter_peers=""
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local blocked_only=false allowed_only=false restricted_only=false
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rm -f /tmp/wgctl_hs_* /tmp/wgctl_attempt_* 2>/dev/null || true
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--name) filter_name="$2"; shift 2 ;;
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--type) filter_type="$2"; shift 2 ;;
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--peers) filter_peers="$2"; shift 2 ;;
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--blocked) blocked_only=true; shift ;;
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--allowed) allowed_only=true; shift ;;
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--restricted) restricted_only=true; shift ;;
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--help) cmd::watch::help; return ;;
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*)
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log::error "Unknown flag: $1"
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cmd::watch::help
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return 1
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;;
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esac
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done
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cmd::watch::header
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if ! $blocked_only && ! $restricted_only; then
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(
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while true; do
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cmd::watch::poll_handshakes \
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"$filter_name" "$filter_type" "$allowed_only" "$filter_peers"
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sleep 5
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done
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) &
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local poller_pid=$!
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fi
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cmd::watch::tail_events \
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"$filter_name" "$filter_type" \
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"$blocked_only" "$restricted_only" \
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"$allowed_only" "$filter_peers" &
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local tailer_pid=$!
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trap "kill $tailer_pid ${poller_pid:-} 2>/dev/null; \
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rm -f /tmp/wgctl_hs_* /tmp/wgctl_attempt_*; echo ''; exit 0" INT TERM
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wait
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} |