2 * Copyright (c) 2017 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vppinfra/error.h>
16 #include <vppinfra/hash.h>
17 #include <vnet/vnet.h>
18 #include <vnet/ip/ip.h>
19 #include <vnet/udp/udp.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <vnet/lisp-gpe/lisp_gpe.h>
22 #include <vnet/lisp-gpe/lisp_gpe_packet.h>
24 #include <nsh/nsh_packet.h>
25 #include <nsh/nsh-md2-ioam/nsh_md2_ioam.h>
26 #include <nsh/nsh-md2-ioam/nsh_md2_ioam_util.h>
27 #include <vnet/fib/ip6_fib.h>
28 #include <vnet/fib/ip4_fib.h>
29 #include <vnet/fib/fib_entry.h>
31 /* Statistics (not really errors) */
32 #define foreach_nsh_md2_ioam_encap_transit_error \
33 _(ENCAPSULATED, "good packets encapsulated")
35 static char *nsh_md2_ioam_encap_transit_error_strings[] = {
36 #define _(sym,string) string,
37 foreach_nsh_md2_ioam_encap_transit_error
43 #define _(sym,str) NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_ERROR_##sym,
44 foreach_nsh_md2_ioam_encap_transit_error
46 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_ERROR,
47 } nsh_md2_ioam_encap_transit_error_t;
51 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT,
52 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP,
53 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT
54 } nsh_md2_ioam_encap_transit_next_t;
58 VNET_FEATURE_INIT (nsh_md2_ioam_encap_transit, static) =
60 .arc_name = "ip4-output",
61 .node_name = "nsh-md2-ioam-encap-transit",
62 .runs_before = VNET_FEATURES ("adj-midchain-tx"),
68 nsh_md2_ioam_encap_transit (vlib_main_t * vm,
69 vlib_node_runtime_t * node,
70 vlib_frame_t * from_frame)
72 u32 n_left_from, next_index, *from, *to_next;
74 from = vlib_frame_vector_args (from_frame);
75 n_left_from = from_frame->n_vectors;
77 next_index = node->cached_next_index;
79 while (n_left_from > 0)
83 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
86 while (n_left_from > 0 && n_left_to_next > 0)
90 u32 next0 = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT;
101 b0 = vlib_get_buffer (vm, bi0);
102 iph_offset = vnet_buffer (b0)->ip.save_rewrite_length;
103 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0)
106 /* just forward non ipv4 packets */
108 ((ip0->ip_version_and_header_length & 0xF0) == 0x40))
111 udp_header_t *udp_hdr0 = (udp_header_t *) (ip0 + 1);
113 ((ip0->protocol == IP_PROTOCOL_UDP) &&
114 (clib_net_to_host_u16 (udp_hdr0->dst_port) ==
115 UDP_DST_PORT_lisp_gpe)))
118 /* Check the iOAM header */
119 lisp_gpe_header_t *lisp_gpe_hdr0 =
120 (lisp_gpe_header_t *) (udp_hdr0 + 1);
121 nsh_base_header_t *nsh_hdr =
122 (nsh_base_header_t *) (lisp_gpe_hdr0 + 1);
125 (lisp_gpe_hdr0->next_protocol ==
126 LISP_GPE_NEXT_PROTO_NSH) && (nsh_hdr->md_type == 2))
129 nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main;
131 clib_memset (&key4, 0, sizeof (key4));
132 key4.fp_proto = FIB_PROTOCOL_IP4;
133 key4.fp_addr.ip4.as_u32 = ip0->dst_address.as_u32;
134 t = hash_get_mem (hm->dst_by_ip4, &key4);
137 vlib_buffer_advance (b0,
139 (ethernet_header_t)));
140 nsh_md2_ioam_encap_decap_ioam_v4_one_inline (vm,
144 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP,
148 vlib_buffer_advance (b0,
150 (ethernet_header_t)));
156 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
157 n_left_to_next, bi0, next0);
160 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
163 return from_frame->n_vectors;
166 extern u8 *format_nsh_node_map_trace (u8 * s, va_list * args);
168 VLIB_REGISTER_NODE (nsh_md2_ioam_encap_transit_node) = {
169 .function = nsh_md2_ioam_encap_transit,
170 .name = "nsh-md2-ioam-encap-transit",
171 .vector_size = sizeof (u32),
172 .format_trace = format_nsh_node_map_trace,
173 .type = VLIB_NODE_TYPE_INTERNAL,
175 .n_errors = ARRAY_LEN(nsh_md2_ioam_encap_transit_error_strings),
176 .error_strings = nsh_md2_ioam_encap_transit_error_strings,
178 .n_next_nodes = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT,
181 [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT] = "interface-output",
182 [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP] = "error-drop",
190 * fd.io coding-style-patch-verification: ON
193 * eval: (c-set-style "gnu")