From ab2f22f03786995406fd5b894addccfa9e5aff53 Mon Sep 17 00:00:00 2001
From: Saravanakumar Gandhi <sargandh@CentOS.(none)>
Date: Fri, 15 Mar 2013 18:21:10 +0530
Subject: [PATCH] Modified set_rand_dhcp_xid() to generate random DHCP xid if
 the dhtest is called multiple times within a second

---
 dhtest.c    | 1 +
 functions.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/dhtest.c b/dhtest.c
index a1f9471..08981e2 100644
--- a/dhtest.c
+++ b/dhtest.c
@@ -7,6 +7,7 @@
 #include<stdio.h>
 #include<string.h>
 #include<sys/types.h>
+#include<unistd.h>
 #include<sys/socket.h>
 #include<net/if.h>
 #include<linux/if_packet.h>
diff --git a/functions.c b/functions.c
index 67c773f..d55f365 100644
--- a/functions.c
+++ b/functions.c
@@ -328,7 +328,7 @@ int reset_dhopt_size()
 int set_rand_dhcp_xid()
 {
     if(dhcp_xid == 0) {
-	srand(time(NULL));
+	srand(time(NULL) ^ (getpid() << 16));
 	dhcp_xid = rand() % 0xffffffff;
     }
     return 0;