From 5c7bf0b3958ecbc95dabdbd64d7af80a4479e92e Mon Sep 17 00:00:00 2001
From: Ian Gulliver <flamingcow@gmail.com>
Date: Sun, 28 Feb 2016 22:50:26 -0800
Subject: [PATCH] If we get a write <-> write connection, don't waste space
 buffering data we won't use.

---
 adsbus/socket.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/adsbus/socket.c b/adsbus/socket.c
index 0dfaa57..b451e85 100644
--- a/adsbus/socket.c
+++ b/adsbus/socket.c
@@ -35,6 +35,10 @@ void socket_send_init(int fd) {
 	// Called by data flow code; NOT safe to assume that fd is a socket
 	int res = shutdown(fd, SHUT_RD);
 	assert(res == 0 || (res == -1 && errno == ENOTSOCK));
+
+	int optval = 128; // Lowest value that the kernel will accept
+	res = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &optval, sizeof(optval));
+	assert(res == 0 || (res == -1 && errno == ENOTSOCK));
 }
 
 void socket_receive_init(int fd) {