feat: optional label on a forward rule

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/server/db.go

@@ -106,6 +106,7 @@ CREATE TABLE IF NOT EXISTS forward_rules (
 		`ALTER TABLE agents ADD COLUMN run_user TEXT NOT NULL DEFAULT ''`,
 		`ALTER TABLE agents ADD COLUMN login_user TEXT NOT NULL DEFAULT ''`,
 		`ALTER TABLE forward_rules ADD COLUMN no_ufw INTEGER NOT NULL DEFAULT 0`,
+		`ALTER TABLE forward_rules ADD COLUMN label TEXT NOT NULL DEFAULT ''`,
 	} {
 		if _, err := db.sql.Exec(alter); err != nil && !strings.Contains(err.Error(), "duplicate column") {
 			return err
@@ -330,6 +331,7 @@ type ForwardRule struct {
 	ListenAddr string
 	Proto      string
 	NoUfw      bool   // the panel opens no ufw rule for this forward
+	Label      string // optional note shown next to the rule
 }
 
 func (db *DB) CreateForwardRule(r ForwardRule) (int64, error) {
@@ -337,9 +339,9 @@ func (db *DB) CreateForwardRule(r ForwardRule) (int64, error) {
 		r.Proto = "http"
 	}
 	res, err := db.sql.Exec(
-		`INSERT INTO forward_rules(agent_id, client_port, host_port, listen_addr, proto, no_ufw, created_at)
+		`INSERT INTO forward_rules(agent_id, client_port, host_port, listen_addr, proto, no_ufw, label, created_at)
-		 VALUES(?, ?, ?, ?, ?, ?, ?)`,
+		 VALUES(?, ?, ?, ?, ?, ?, ?, ?)`,
-		r.AgentID, r.ClientPort, r.HostPort, r.ListenAddr, r.Proto, r.NoUfw, time.Now().Unix())
+		r.AgentID, r.ClientPort, r.HostPort, r.ListenAddr, r.Proto, r.NoUfw, r.Label, time.Now().Unix())
 	if err != nil {
 		return 0, err
 	}
@@ -348,7 +350,7 @@ func (db *DB) CreateForwardRule(r ForwardRule) (int64, error) {
 
 func (db *DB) ListForwardRules() ([]ForwardRule, error) {
 	rows, err := db.sql.Query(
-		`SELECT id, agent_id, client_port, host_port, listen_addr, proto, no_ufw FROM forward_rules ORDER BY id`)
+		`SELECT id, agent_id, client_port, host_port, listen_addr, proto, no_ufw, label FROM forward_rules ORDER BY id`)
 	if err != nil {
 		return nil, err
 	}
@@ -356,7 +358,7 @@ func (db *DB) ListForwardRules() ([]ForwardRule, error) {
 	var out []ForwardRule
 	for rows.Next() {
 		var r ForwardRule
-		if err := rows.Scan(&r.ID, &r.AgentID, &r.ClientPort, &r.HostPort, &r.ListenAddr, &r.Proto, &r.NoUfw); err != nil {
+		if err := rows.Scan(&r.ID, &r.AgentID, &r.ClientPort, &r.HostPort, &r.ListenAddr, &r.Proto, &r.NoUfw, &r.Label); err != nil {
 			return nil, err
 		}
 		out = append(out, r)
@@ -381,8 +383,8 @@ func (db *DB) ListForwardRulesByAgent(agentID string) ([]ForwardRule, error) {
 func (db *DB) GetForwardRule(id int64) (*ForwardRule, error) {
 	r := &ForwardRule{}
 	err := db.sql.QueryRow(
-		`SELECT id, agent_id, client_port, host_port, listen_addr, proto, no_ufw FROM forward_rules WHERE id = ?`, id).
+		`SELECT id, agent_id, client_port, host_port, listen_addr, proto, no_ufw, label FROM forward_rules WHERE id = ?`, id).
-		Scan(&r.ID, &r.AgentID, &r.ClientPort, &r.HostPort, &r.ListenAddr, &r.Proto, &r.NoUfw)
+		Scan(&r.ID, &r.AgentID, &r.ClientPort, &r.HostPort, &r.ListenAddr, &r.Proto, &r.NoUfw, &r.Label)
 	if err == sql.ErrNoRows {
 		return nil, nil
 	}

internal/server/handlers_panel_fwd.go

@@ -87,7 +87,7 @@ func (s *Server) handleForwardAdd(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	rule := ForwardRule{AgentID: id, ClientPort: clientPort, HostPort: hostPort, ListenAddr: listenAddr, Proto: protoKind,
-		NoUfw: r.FormValue("no_ufw") != ""}
+		NoUfw: r.FormValue("no_ufw") != "", Label: forwardLabel(r.FormValue("label"))}
 	ruleID, err := s.db.CreateForwardRule(rule)
 	if err != nil {
 		http.Redirect(w, r, "/agents/"+id+"/forwards?err=db", http.StatusSeeOther)
@@ -130,3 +130,15 @@ func (s *Server) removeForward(rid int64) {
 	_ = s.db.DeleteForwardRule(rid)
 	s.ufw.revokeForRule(rid)
 }
+
+// forwardLabelMax bounds a rule's label, in characters.
+const forwardLabelMax = 80
+
+// forwardLabel tidies the optional note of a rule: one line, bounded length.
+func forwardLabel(v string) string {
+	v = strings.Join(strings.Fields(v), " ")
+	if r := []rune(v); len(r) > forwardLabelMax {
+		v = string(r[:forwardLabelMax])
+	}
+	return v
+}

internal/server/web/templates/forwards.html

@@ -40,7 +40,7 @@
     <h2>Правила</h2>
     {{if .Rules}}
     <table>
-      <thead><tr><th>Тип</th><th>Хост (порт)</th><th>→ Клиент (порт)</th><th>Слушать на</th><th></th></tr></thead>
+      <thead><tr><th>Тип</th><th>Хост (порт)</th><th>→ Клиент (порт)</th><th>Слушать на</th><th>Метка</th><th></th></tr></thead>
       <tbody>
       {{range .Rules}}
         <tr>
@@ -48,6 +48,7 @@
           <td class="muted">:{{.HostPort}}</td>
           <td class="muted">127.0.0.1:{{.ClientPort}}</td>
           <td class="muted">{{.ListenAddr}}{{if and .NoUfw $.UfwEnabled}} · без ufw{{end}}</td>
+          <td>{{.Label}}</td>
           <td style="text-align:right">
             <form method="post" action="/forwards/{{.ID}}/delete" style="display:inline"
                   onsubmit="return confirm('Удалить правило?')">
@@ -89,6 +90,10 @@
           <label>Слушать на хосте</label>
           <input type="text" name="listen_addr" value="0.0.0.0" style="max-width:160px">
         </div>
+        <div class="fld" style="flex:1; min-width:200px">
+          <label>Метка (необязательно)</label>
+          <input type="text" name="label" maxlength="80" placeholder="для чего это правило">
+        </div>
         <button type="submit">Создать</button>
       </div>
       {{if .UfwEnabled}}