From 05202707336dea740cb0cfaaaaef0dd7ecf2992e Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Tue, 24 Jun 2014 08:22:12 -0600
Subject: [PATCH] Net PKT: Suppress ARP requests for packet socket transfers

---
 include/net/if.h    |  1 +
 net/arp/arp_inout.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/net/if.h b/include/net/if.h
index 9c1f2a55174..eae6bcb3fc3 100644
--- a/include/net/if.h
+++ b/include/net/if.h
@@ -55,6 +55,7 @@
 #define IFF_DOWN        (1 << 0)
 #define IFF_UP          (1 << 1)
 #define IFF_RUNNING     (1 << 2)
+#define IFF_NOARP       (1 << 7)
 
 
 /*******************************************************************************************
diff --git a/net/arp/arp_inout.c b/net/arp/arp_inout.c
index 78bebae6d0f..18a1483cad9 100644
--- a/net/arp/arp_inout.c
+++ b/net/arp/arp_inout.c
@@ -327,6 +327,17 @@ void arp_out(struct uip_driver_s *dev)
   in_addr_t               ipaddr;
   in_addr_t               destipaddr;
 
+#ifdef CONFIG_NET_PKT
+  /* Skip sending ARP requests when the frame to be transmitted was
+   * written into a packet socket.
+   */
+
+  if ((dev->d_flags & IFF_NOARP) == IFF_NOARP)
+    {
+      return;
+    }
+#endif
+
   /* Find the destination IP address in the ARP table and construct
    * the Ethernet header. If the destination IP address isn't on the
    * local network, we use the default router's IP address instead.