From 09b2671759791e2c57ef38ad530c3f6b58979dbf Mon Sep 17 00:00:00 2001
From: Owen <owen@txv.io>
Date: Mon, 1 Jun 2026 13:57:54 -0700
Subject: [PATCH] Send hp error to olm

---
 server/routers/olm/error.ts                    | 8 ++++++++
 server/routers/olm/handleOlmRegisterMessage.ts | 1 +
 2 files changed, 9 insertions(+)

diff --git a/server/routers/olm/error.ts b/server/routers/olm/error.ts
index 6ea209cea..15047b94c 100644
--- a/server/routers/olm/error.ts
+++ b/server/routers/olm/error.ts
@@ -1,4 +1,8 @@
 import { sendToClient } from "#dynamic/routers/ws";
+import config from "@server/lib/config";
+
+const udpPort = config.getRawConfig().gerbil.clients_start_port;
+
 // Error codes for registration failures
 export const OlmErrorCodes = {
     OLM_NOT_FOUND: {
@@ -86,6 +90,10 @@ export const OlmErrorCodes = {
     TERMINATED_BLOCKED: {
         code: "TERMINATED_BLOCKED",
         message: "This session was terminated because access was blocked."
+    },
+    HOLEPUNCH_MISSING: {
+        code: "HOLEPUNCH_MISSING",
+        message: `Hole punch information is missing. Please ensure your client can reach the server on UDP port ${udpPort} and try registering again.`
     }
 } as const;
 
diff --git a/server/routers/olm/handleOlmRegisterMessage.ts b/server/routers/olm/handleOlmRegisterMessage.ts
index 7735e4d30..747770bff 100644
--- a/server/routers/olm/handleOlmRegisterMessage.ts
+++ b/server/routers/olm/handleOlmRegisterMessage.ts
@@ -327,6 +327,7 @@ export const handleOlmRegisterMessage: MessageHandler = async (context) => {
             `[handleOlmRegisterMessage] Client last hole punch is too old and we have sites to send; skipping this register. The client is failing to hole punch and identify its network address with the server. Can the client reach the server on UDP port ${config.getRawConfig().gerbil.clients_start_port}?`,
             { orgId: client.orgId, clientId: client.clientId }
         );
+        sendOlmError(OlmErrorCodes.HOLEPUNCH_MISSING, olm.olmId);
         return;
     }