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VPP-303 vnet/vnet/sr docs

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Change-Id: I66eff733dff5e7eb2fa429dcdbb2b6b82423d25c
Signed-off-by: Keith Burns (alagalah) <alagalah@gmail.com>
This commit is contained in:
Keith Burns (alagalah)
2016-08-06 08:55:57 -07:00
committed by Keith Burns
parent 06c5ffd625
commit ff07b87773
2 changed files with 60 additions and 2 deletions
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25
vnet/vnet/sr/dir.dox Normal file
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@ -0,0 +1,25 @@
/*
*
* Copyright (c) 2013 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
@dir
@brief Segment Routing code
An implementation of Segment Routing as per:
draft-previdi-6man-segment-routing-header-05
See file: rfc_draft_05.txt
*/

37
vnet/vnet/sr/sr_replicate.c
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@ -14,6 +14,15 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* @brief Functions for replicating packets across SR tunnels.
*
* Leverages rte_pktmbuf_clone() so there is no memcpy for
* invariant parts of the packet.
*
* @note Currently requires DPDK
*/
#if DPDK > 0 /* Cannot run replicate without DPDK */
#include <vlib/vlib.h>
@ -28,6 +37,10 @@
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
/**
* @brief sr_replicate state.
*
*/
typedef struct
{
/* convenience */
@ -37,7 +50,10 @@ typedef struct
sr_replicate_main_t sr_replicate_main;
/**
* @brief Information to display in packet trace.
*
*/
typedef struct
{
ip6_address_t src, dst;
@ -47,7 +63,13 @@ typedef struct
u8 sr[256];
} sr_replicate_trace_t;
/* packet trace format function */
/**
* @brief packet trace format function.
*
* @param *s u8 used for string output
* @param *args va_list structured input to va_arg to output @ref sr_replicate_trace_t
* @return *s u8 - formatted trace output
*/
static u8 *
format_sr_replicate_trace (u8 * s, va_list * args)
{
@ -97,12 +119,23 @@ static char *sr_replicate_error_strings[] = {
#undef _
};
/**
* @brief Defines next-nodes for packet processing.
*
*/
typedef enum
{
SR_REPLICATE_NEXT_IP6_LOOKUP,
SR_REPLICATE_N_NEXT,
} sr_replicate_next_t;
/**
* @brief Single loop packet replicator.
*
* @node sr-replicate
* @param vm vlib_main_t
* @return frame->n_vectors uword
*/
static uword
sr_replicate_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)