Iptables generator funciton bugfix followup: allow host network ports

src/functions/backend/setup/setup-wireguard-host.ts

@@ -5,7 +5,6 @@ import type {
 } from "@/db/types/db";
 import grabDirNames from "@/src/utils/grab-dir-names";
 import { execSync } from "node:child_process";
-import grabHostNetworkInterface from "./grab-host-network-interface";
 import type { APIResponseObject } from "@moduletrace/bunext/types";
 import BunSQLite from "@moduletrace/bun-sqlite";
 import type { TableType, User } from "@/src/types";
@@ -92,8 +91,31 @@ export default async function setupWireguardHost({
         rules_by_client_id.set(rule.client_id, existing_rules);
     }
 
-    const TARGET_INTERFACE =
-        host?.interface || (await grabHostNetworkInterface());
+    const sibling_hosts_res = await BunSQLite.select<
+        BUN_SQLITE_WGUI_HOSTS,
+        TableType
+    >({
+        table: "hosts",
+    });
+
+    const sibling_subnets = [
+        ...new Set(
+            (sibling_hosts_res.payload || [])
+                .filter(
+                    (host_row) =>
+                        host_row.id != HOST_ID &&
+                        typeof host_row.wg_ip_address == "string" &&
+                        host_row.wg_ip_address.trim() != "",
+                )
+                .map((host_row) => {
+                    const parts = String(host_row.wg_ip_address)
+                        .trim()
+                        .split(".");
+                    return `${parts.slice(0, 3).join(".")}.0/24`;
+                }),
+        ),
+    ];
+
     const HOST_WG_IP = host?.wg_ip_address || wg_subnet_ip;
 
     if (!HOST_WG_IP) {
@@ -178,8 +200,8 @@ export default async function setupWireguardHost({
         const iptables_scripts = buildHostIptablesScripts({
             host_id: Number(HOST_ID),
             interface_name: INTERFACE_NAME,
-            target_interface: TARGET_INTERFACE || "eth0",
             host_subnet: HOST_SUBNET,
+            sibling_subnets,
             clients: clients.map((client) => ({
                 id: client.id,
                 wg_ip_address: client.wg_ip_address,