From: Florin Coras <fcoras@cisco.com>
Date: Tue, 18 Jun 2019 15:55:14 +0000 (-0700)
Subject: tcp: allow custom output next node
X-Git-Tag: v20.01-rc0~381
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=540a8dacbe0da88fde97a6c1201d6e1ba95c5cf6;p=vpp.git

tcp: allow custom output next node

Type: feature

Change-Id: If9804d3685d2a52efa06e412ae1ebb39c6a44b8b
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vnet/tcp/tcp.h b/src/vnet/tcp/tcp.h
index aeae57c6c6d..132ec13892d 100644
--- a/src/vnet/tcp/tcp.h
+++ b/src/vnet/tcp/tcp.h
@@ -323,6 +323,7 @@ typedef struct _tcp_connection
   u32 tx_fifo_size;	/**< Tx fifo size. Used to constrain cwnd */
 
   u32 psh_seq;		/**< Add psh header for seg that includes this */
+  u32 out_next_index;	/**< Can be used to control next node in output */
 } tcp_connection_t;
 
 /* *INDENT-OFF* */
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 77065cd5200..abd674d94be 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -2062,6 +2062,9 @@ tcp_output_handle_packet (tcp_connection_t * tc0, vlib_buffer_t * b0,
       return;
     }
 
+  /* If next_index is not drop use it */
+  *next0 = tc0->out_next_index ? tc0->out_next_index : *next0;
+
   vnet_buffer (b0)->sw_if_index[VLIB_TX] = tc0->c_fib_index;
   vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;