From d313f9e6f7c6d50aac189668a67bf13b86dd791c Mon Sep 17 00:00:00 2001 From: Hongjun Ni Date: Mon, 27 Aug 2018 20:27:43 +0800 Subject: Port NSH plugin to VPP Please refer to https://wiki.fd.io/view/NSH_SFC Change-Id: Iba7e33e4dbb064c1527aaddbe8dce4b6b63a627a Signed-off-by: Hongjun Ni Signed-off-by: Keith Burns (alagalah) --- src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h | 122 +++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h (limited to 'src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h') diff --git a/src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h b/src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h new file mode 100644 index 00000000000..8fbb3b7aaf7 --- /dev/null +++ b/src/plugins/nsh/nsh-md2-ioam/nsh_md2_ioam_util.h @@ -0,0 +1,122 @@ +/* + * Copyright (c) 2017 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. + */ +#ifndef __included_nsh_md2_ioam_util_h__ +#define __included_nsh_md2_ioam_util_h__ + +#include +#include +#include +#include +#include +#include + + +extern nsh_option_map_t *nsh_md2_lookup_option (u16 class, u8 type); + + +typedef struct +{ + u8 trace_data[256]; +} nsh_transit_trace_t; + +always_inline void +nsh_md2_ioam_encap_decap_ioam_v4_one_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_buffer_t * b0, + u32 * next0, u32 drop_node_val, + u8 use_adj) +{ + ip4_header_t *ip0; + udp_header_t *udp_hdr0; + lisp_gpe_header_t *lisp_gpe_hdr0; + nsh_base_header_t *nsh_hdr; + nsh_tlv_header_t *opt0; + nsh_tlv_header_t *limit0; + nsh_main_t *hm = &nsh_main; + nsh_option_map_t *nsh_option; + + /* Populate the iOAM header */ + ip0 = vlib_buffer_get_current (b0); + udp_hdr0 = (udp_header_t *) (ip0 + 1); + lisp_gpe_hdr0 = (lisp_gpe_header_t *) (udp_hdr0 + 1); + nsh_hdr = (nsh_base_header_t *) (lisp_gpe_hdr0 + 1); + opt0 = (nsh_tlv_header_t *) (nsh_hdr + 1); + limit0 = + (nsh_tlv_header_t *) ((u8 *) opt0 + (nsh_hdr->length * 4) - + sizeof (nsh_base_header_t)); + + /* + * Basic validity checks + */ + if ((nsh_hdr->length * 4) > clib_net_to_host_u16 (ip0->length)) + { + *next0 = drop_node_val; + return; + } + + if (nsh_hdr->md_type != 2) + { + *next0 = drop_node_val; + return; + } + + /* Scan the set of h-b-h options, process ones that we understand */ + while (opt0 < limit0) + { + u8 type0; + type0 = opt0->type; + switch (type0) + { + case 0: /* Pad1 */ + opt0 = (nsh_tlv_header_t *) ((u8 *) opt0) + 1; + continue; + case 1: /* PadN */ + break; + default: + nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type); + if ((nsh_option != NULL) && (hm->options[nsh_option->option_id])) + { + if ((*hm->options[nsh_option->option_id]) (b0, opt0) < 0) + { + *next0 = drop_node_val; + return; + } + } + break; + } + opt0 = + (nsh_tlv_header_t *) (((u8 *) opt0) + opt0->length + + sizeof (nsh_tlv_header_t)); + } + + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + nsh_transit_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); + clib_memcpy (&(tr->trace_data), nsh_hdr, (nsh_hdr->length * 4)); + } + return; +} + + +#endif + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg