From bacc5e421397e4b1112012c78cf55442dd0d152f Mon Sep 17 00:00:00 2001
From: Owen <owen@txv.io>
Date: Sun, 23 Feb 2025 20:18:03 -0500
Subject: [PATCH] Add relay message

---
 server/routers/messageHandlers.ts           |  5 +-
 server/routers/olm/handleOlmRelayMessage.ts | 81 +++++++++++++++++++++
 server/routers/olm/index.ts                 |  3 +-
 3 files changed, 86 insertions(+), 3 deletions(-)
 create mode 100644 server/routers/olm/handleOlmRelayMessage.ts

diff --git a/server/routers/messageHandlers.ts b/server/routers/messageHandlers.ts
index f23ea0a8..759a88ea 100644
--- a/server/routers/messageHandlers.ts
+++ b/server/routers/messageHandlers.ts
@@ -1,5 +1,5 @@
 import { handleNewtRegisterMessage, handleReceiveBandwidthMessage } from "./newt";
-import { handleOlmRegisterMessage } from "./olm";
+import { handleOlmRegisterMessage, handleOlmRelayMessage } from "./olm";
 import { handleGetConfigMessage } from "./newt/handleGetConfigMessage";
 import { MessageHandler } from "./ws";
 
@@ -7,5 +7,6 @@ export const messageHandlers: Record<string, MessageHandler> = {
     "newt/wg/register": handleNewtRegisterMessage,
     "olm/wg/register": handleOlmRegisterMessage,
     "newt/wg/get-config": handleGetConfigMessage,
-    "newt/receive-bandwidth": handleReceiveBandwidthMessage 
+    "newt/receive-bandwidth": handleReceiveBandwidthMessage,
+    "olm/wg/relay": handleOlmRelayMessage
 };
diff --git a/server/routers/olm/handleOlmRelayMessage.ts b/server/routers/olm/handleOlmRelayMessage.ts
new file mode 100644
index 00000000..9cf0ceb2
--- /dev/null
+++ b/server/routers/olm/handleOlmRelayMessage.ts
@@ -0,0 +1,81 @@
+import db from "@server/db";
+import { MessageHandler } from "../ws";
+import { clients, Olm, olms, sites } from "@server/db/schema";
+import { eq } from "drizzle-orm";
+import { addPeer, deletePeer } from "../newt/peers";
+import logger from "@server/logger";
+
+export const handleOlmRelayMessage: MessageHandler = async (context) => {
+    const { message, client: c, sendToClient } = context;
+    const olm = c as Olm;
+
+    logger.info("Handling relay olm message!");
+
+    if (!olm) {
+        logger.warn("Olm not found");
+        return;
+    }
+
+    if (!olm.clientId) {
+        logger.warn("Olm has no site!"); // TODO: Maybe we create the site here?
+        return;
+    }
+
+    const clientId = olm.clientId;
+
+    const [client] = await db
+        .select()
+        .from(clients)
+        .where(eq(clients.clientId, clientId))
+        .limit(1);
+
+    if (!client || !client.siteId) {
+        logger.warn("Site not found or does not have exit node");
+        return;
+    }
+
+    const [site] = await db
+        .select()
+        .from(sites)
+        .where(eq(sites.siteId, client.siteId))
+        .limit(1);
+
+    if (!client) {
+        logger.warn("Site not found or does not have exit node");
+        return;
+    }
+
+    // make sure we hand endpoints for both the site and the client and the lastHolePunch is not too old
+    if (!client.pubKey) {
+        logger.warn("Site or client has no endpoint or listen port");
+        return;
+    }
+
+    if (!site.subnet) {
+        logger.warn("Site has no subnet");
+        return;
+    }
+
+    await deletePeer(site.siteId, client.pubKey);
+
+    // add the peer to the exit node
+    await addPeer(site.siteId, {
+        publicKey: client.pubKey,
+        allowedIps: [client.subnet],
+        endpoint: "" 
+    });
+
+    return {
+        message: {
+            type: "olm/wg/connect",
+            data: {
+                endpoint: site.endpoint,
+                publicKey: site.publicKey,
+                serverIP: site.address!.split("/")[0],
+                tunnelIP: client.subnet
+            }
+        },
+        broadcast: false, // Send to all olms
+        excludeSender: false // Include sender in broadcast
+    };
+};
diff --git a/server/routers/olm/index.ts b/server/routers/olm/index.ts
index 616480cc..b7373961 100644
--- a/server/routers/olm/index.ts
+++ b/server/routers/olm/index.ts
@@ -1,3 +1,4 @@
 export * from "./handleOlmRegisterMessage";
 export * from "./getOlmToken";
-export * from "./createOlm";
\ No newline at end of file
+export * from "./createOlm";
+export * from "./handleOlmRelayMessage";
\ No newline at end of file