From 20557e8ce482fbb31aab890950b6bb058fcfec9c Mon Sep 17 00:00:00 2001
From: Cory McWilliams <cory@unprompted.com>
Date: Thu, 17 Aug 2023 16:54:33 +0000
Subject: [PATCH] Respond better when somebody disconnects from us with a
 tunnel.  Trying to robustify tunnels.  This is largely untested.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4407 ed5197a5-7fde-0310-b194-c3ffbd925b24
---
 src/ssb.rpc.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/ssb.rpc.c b/src/ssb.rpc.c
index 55f64264..9fd3995f 100644
--- a/src/ssb.rpc.c
+++ b/src/ssb.rpc.c
@@ -281,7 +281,23 @@ typedef struct tunnel_t
 void _tf_ssb_rpc_tunnel_callback(tf_ssb_connection_t* connection, uint8_t flags, int32_t request_number, JSValue args, const uint8_t* message, size_t size, void* user_data)
 {
 	tunnel_t* tun = user_data;
-	tf_ssb_connection_rpc_send(tun->connection, flags, tun->request_number, message, size, NULL, NULL, NULL);
+	if (flags & k_ssb_rpc_flag_end_error)
+	{
+		tf_ssb_connection_rpc_send(
+			connection,
+			flags,
+			-request_number,
+			(const uint8_t*)"false",
+			strlen("false"),
+			NULL,
+			NULL,
+			NULL);
+		tf_ssb_connection_close(tun->connection);
+	}
+	else
+	{
+		tf_ssb_connection_rpc_send(tun->connection, flags, tun->request_number, message, size, NULL, NULL, NULL);
+	}
 }
 
 void _tf_ssb_rpc_tunnel_cleanup(tf_ssb_t* ssb, void* user_data)