From 673e4407700b90c5ecbbcec5e06fec07fc1149b1 Mon Sep 17 00:00:00 2001
From: Rafael Zalamena <rzalamena@opensourcerouting.org>
Date: Mon, 21 Feb 2022 06:28:11 -0500
Subject: [PATCH] lib: tweak northbound gRPC default timeout

Don't let open sockets hang for too long. This will fix an issue where a
improperly coded client (e.g. socat) could exaust the amount of open
file descriptors.

Documentation:
https://grpc.github.io/grpc/cpp/md_doc_keepalive.html

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
---
 lib/northbound_grpc.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/northbound_grpc.cpp b/lib/northbound_grpc.cpp
index e227d0385c..ecab732e92 100644
--- a/lib/northbound_grpc.cpp
+++ b/lib/northbound_grpc.cpp
@@ -1264,6 +1264,8 @@ static void *grpc_pthread_start(void *arg)
 	builder.AddListeningPort(server_address.str(),
 				 grpc::InsecureServerCredentials());
 	builder.RegisterService(service);
+	builder.AddChannelArgument(
+		GRPC_ARG_HTTP2_MIN_RECV_PING_INTERVAL_WITHOUT_DATA_MS, 5000);
 	auto cq = builder.AddCompletionQueue();
 	s_cq = cq.get();
 	s_server = builder.BuildAndStart();