feat: add DeleteById function

iptables/iptables.go

@@ -241,6 +241,24 @@ func (ipt *IPTables) DeleteIfExists(table, chain string, rulespec ...string) err
 	return err
 }
 
+// DeleteById deletes the rule with the specified ID in the given table and chain.
+func (ipt *IPTables) DeleteById(table, chain string, id int) (string, error) {
+	rules, err := ipt.List(table, chain)
+	if err != nil {
+		return "", err
+	}
+
+	for _, rule := range rules {
+			args := []string{"-t", table, "-D", chain, strconv.Itoa(id)}
+			_, err := ipt.executeList(args)
+			if err != nil {
+				return "", fmt.Errorf("rule with ID %d not found: %v", id, err)
+			}
+	}
+
+	return "Rule deleted successfully", nil
+}
+
 // List rules in specified table/chain
 func (ipt *IPTables) ListById(table, chain string, id int) (string, error) {
 	args := []string{"-t", table, "-S", chain, strconv.Itoa(id)}