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_local.h>
20 #include <vnet/ethernet/ethernet.h>
21 #include <lisp/lisp-gpe/lisp_gpe_packet.h>
23 #include <nsh/nsh_packet.h>
24 #include <nsh/nsh-md2-ioam/nsh_md2_ioam.h>
25 #include <nsh/nsh-md2-ioam/nsh_md2_ioam_util.h>
26 #include <vnet/fib/ip6_fib.h>
27 #include <vnet/fib/ip4_fib.h>
28 #include <vnet/fib/fib_entry.h>
30 /* Statistics (not really errors) */
31 #define foreach_nsh_md2_ioam_encap_transit_error \
32 _(ENCAPSULATED, "good packets encapsulated")
34 static char *nsh_md2_ioam_encap_transit_error_strings[] = {
35 #define _(sym,string) string,
36 foreach_nsh_md2_ioam_encap_transit_error
42 #define _(sym,str) NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_ERROR_##sym,
43 foreach_nsh_md2_ioam_encap_transit_error
45 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_ERROR,
46 } nsh_md2_ioam_encap_transit_error_t;
50 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT,
51 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP,
52 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT
53 } nsh_md2_ioam_encap_transit_next_t;
57 VNET_FEATURE_INIT (nsh_md2_ioam_encap_transit, static) =
59 .arc_name = "ip4-output",
60 .node_name = "nsh-md2-ioam-encap-transit",
66 nsh_md2_ioam_encap_transit (vlib_main_t * vm,
67 vlib_node_runtime_t * node,
68 vlib_frame_t * from_frame)
70 u32 n_left_from, next_index, *from, *to_next;
72 from = vlib_frame_vector_args (from_frame);
73 n_left_from = from_frame->n_vectors;
75 next_index = node->cached_next_index;
77 while (n_left_from > 0)
81 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
84 while (n_left_from > 0 && n_left_to_next > 0)
88 u32 next0 = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT;
99 b0 = vlib_get_buffer (vm, bi0);
100 iph_offset = vnet_buffer (b0)->ip.save_rewrite_length;
101 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0)
104 /* just forward non ipv4 packets */
106 ((ip0->ip_version_and_header_length & 0xF0) == 0x40))
109 udp_header_t *udp_hdr0 = (udp_header_t *) (ip0 + 1);
111 ((ip0->protocol == IP_PROTOCOL_UDP) &&
112 (clib_net_to_host_u16 (udp_hdr0->dst_port) ==
113 UDP_DST_PORT_lisp_gpe)))
116 /* Check the iOAM header */
117 lisp_gpe_header_t *lisp_gpe_hdr0 =
118 (lisp_gpe_header_t *) (udp_hdr0 + 1);
119 nsh_base_header_t *nsh_hdr =
120 (nsh_base_header_t *) (lisp_gpe_hdr0 + 1);
123 (lisp_gpe_hdr0->next_protocol ==
124 LISP_GPE_NEXT_PROTO_NSH) && (nsh_hdr->md_type == 2))
127 nsh_md2_ioam_main_t *hm = &nsh_md2_ioam_main;
129 clib_memset (&key4, 0, sizeof (key4));
130 key4.fp_proto = FIB_PROTOCOL_IP4;
131 key4.fp_addr.ip4.as_u32 = ip0->dst_address.as_u32;
132 t = hash_get_mem (hm->dst_by_ip4, &key4);
135 vlib_buffer_advance (b0,
137 (ethernet_header_t)));
138 nsh_md2_ioam_encap_decap_ioam_v4_one_inline (vm,
142 NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP,
146 vlib_buffer_advance (b0,
148 (ethernet_header_t)));
154 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
155 n_left_to_next, bi0, next0);
158 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
161 return from_frame->n_vectors;
164 extern u8 *format_nsh_node_map_trace (u8 * s, va_list * args);
166 VLIB_REGISTER_NODE (nsh_md2_ioam_encap_transit_node) = {
167 .function = nsh_md2_ioam_encap_transit,
168 .name = "nsh-md2-ioam-encap-transit",
169 .vector_size = sizeof (u32),
170 .format_trace = format_nsh_node_map_trace,
171 .type = VLIB_NODE_TYPE_INTERNAL,
173 .n_errors = ARRAY_LEN(nsh_md2_ioam_encap_transit_error_strings),
174 .error_strings = nsh_md2_ioam_encap_transit_error_strings,
176 .n_next_nodes = NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_N_NEXT,
179 [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_OUTPUT] = "interface-output",
180 [NSH_MD2_IOAM_ENCAP_TRANSIT_IOAM_NEXT_DROP] = "error-drop",
188 * fd.io coding-style-patch-verification: ON
191 * eval: (c-set-style "gnu")