From 149d014441d13220e47ac5e637ca87b9334fa682 Mon Sep 17 00:00:00 2001
From: bert hubert <bert.hubert@netherlabs.nl>
Date: Tue, 26 Apr 2016 13:39:08 +0200
Subject: [PATCH] setTCPNoDelay() for dnsdist console. Yak.

---
 pdns/misc.cc | 12 ++++++++++++
 pdns/misc.hh |  1 +
 2 files changed, 13 insertions(+)

diff --git a/pdns/misc.cc b/pdns/misc.cc
index 1b7a545b13..3b2c6670d6 100644
--- a/pdns/misc.cc
+++ b/pdns/misc.cc
@@ -46,6 +46,7 @@
 #include <boost/optional.hpp>
 #include <poll.h>
 #include <iomanip>
+#include <netinet/tcp.h>
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -1047,6 +1048,17 @@ bool setSocketTimestamps(int fd)
   return true; // we pretend this happened.
 }
 
+void setTCPNoDelay(int sock)
+{
+  int flag = 1;
+  setsockopt(sock,            /* socket affected */
+             IPPROTO_TCP,     /* set option at TCP level */
+             TCP_NODELAY,     /* name of option */
+             (char *) &flag,  /* the cast is historical cruft */
+             sizeof(flag));    /* length of option value */
+}
+
+
 bool setNonBlocking(int sock)
 {
   int flags=fcntl(sock,F_GETFL,0);
diff --git a/pdns/misc.hh b/pdns/misc.hh
index 7b2713fbf5..a0ea680a92 100644
--- a/pdns/misc.hh
+++ b/pdns/misc.hh
@@ -600,6 +600,7 @@ bool setBlocking( int sock );
 
 //! Sets the socket into non-blocking mode.
 bool setNonBlocking( int sock );
+void setTCPNoDelay(int sock);
 bool isNonBlocking(int sock);
 int closesocket(int fd);
 bool setCloseOnExec(int sock);
-- 
2.47.2