From 9f12988b908768447998d46480a156b46e2797df Mon Sep 17 00:00:00 2001
From: Johannes Hofmann <Johannes.Hofmann@gmx.de>
Date: Wed, 13 Jan 2010 11:49:21 +0100
Subject: use TCP_NODELAY for DPI communication

---
 dpid/dpid.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'dpid')

diff --git a/dpid/dpid.c b/dpid/dpid.c
index b5e53d7e..33c6c31c 100644
--- a/dpid/dpid.c
+++ b/dpid/dpid.c
@@ -25,6 +25,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <sys/socket.h>
+#include <netinet/tcp.h>
 
 #include <unistd.h>
 #include "dpid_common.h"
@@ -519,10 +520,13 @@ int fill_services_list(struct dp *attlist, int numdpis, Dlist **services_list)
  */
 static int make_socket_fd()
 {
-   int ret;
+   int ret, one = 1;
 
    if ((ret = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
       ERRMSG("make_socket_fd", "socket", errno);
+   } else {
+      /* avoid delays when sending small pieces of data */
+      setsockopt(ret, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));
    }
 
    /* set some buffering to increase the transfer's speed */
-- 
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