From af9b7156c8fd16c671ce9332613faaf864b075b3 Mon Sep 17 00:00:00 2001
From: qinyang <qiny@yusur.tech>
Date: Tue, 27 Jun 2023 01:11:53 -0700
Subject: vcl: ldp support SO_ORIGINAL_DST

Type: improvement

Support SO_ORIGINAL_DST socket option to get original dst_ip4 and dst_port if nat44 rule enabled.

Change-Id: If00e00d03e48f3b78a23a68f1b078954d79dd0f7
Signed-off-by: qinyang <qiny@yusur.tech>
---
 src/vcl/ldp.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/vcl/ldp.c')

diff --git a/src/vcl/ldp.c b/src/vcl/ldp.c
index 2256a2b9061..a8062b4ca8d 100644
--- a/src/vcl/ldp.c
+++ b/src/vcl/ldp.c
@@ -67,6 +67,10 @@
 #define UDP_SEGMENT 103
 #endif
 
+#ifndef SO_ORIGINAL_DST
+/* from <linux/netfilter_ipv4.h> */
+#define SO_ORIGINAL_DST 80
+#endif
 typedef struct ldp_worker_ctx_
 {
   u8 *io_buffer;
@@ -2043,6 +2047,21 @@ getsockopt (int fd, int level, int optname,
 	      break;
 	    }
 	  break;
+	case SOL_IP:
+	  switch (optname)
+	    {
+	    case SO_ORIGINAL_DST:
+	      rv =
+		vls_attr (vlsh, VPPCOM_ATTR_GET_ORIGINAL_DST, optval, optlen);
+	      break;
+	    default:
+	      LDBG (0,
+		    "ERROR: fd %d: getsockopt SOL_IP: vlsh %u "
+		    "optname %d unsupported!",
+		    fd, vlsh, optname);
+	      break;
+	    }
+	  break;
 	case SOL_IPV6:
 	  switch (optname)
 	    {
-- 
cgit 1.2.3-korg