From: John Lo <loj@cisco.com>
Date: Thu, 7 Jun 2018 00:12:46 +0000 (-0400)
Subject: Allow arp-input node to learn IPv4 neighbors from GARP packets
X-Git-Tag: v18.07-rc1~219
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=d018870d1b02109fc8b328446f15312fdd2fcd11;hp=d0e812f2d49cf241f80ac020b6e697cd408f216b;p=vpp.git

Allow arp-input node to learn IPv4 neighbors from GARP packets

Change-Id: I86019f4ff9b0c8c633638fa23341d8ce49099ba6
Signed-off-by: John Lo <loj@cisco.com>
---

diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c
index 682bc2a2c92..203f6f7f01a 100644
--- a/src/vnet/ethernet/arp.c
+++ b/src/vnet/ethernet/arp.c
@@ -1163,6 +1163,11 @@ arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
 		   clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) &&
 		   (dst_is_local0 == 0))
 	    {
+	      /* learn from GARP packet */
+	      if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
+		  arp0->ip4_over_ethernet[1].ip4.as_u32)
+		error0 = arp_learn (vnm, am, sw_if_index0,
+				    &arp0->ip4_over_ethernet[0]);
 	      goto drop1;
 	    }