4 * Copyright (c) 2013 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/plugin/plugin.h>
21 #include <vnet/gre/gre.h>
22 #include <vnet/vxlan/vxlan.h>
23 #include <vnet/vxlan-gpe/vxlan_gpe.h>
24 #include <vnet/l2/l2_classify.h>
25 #include <vnet/adj/adj.h>
26 #include <vpp/app/version.h>
30 /* Uses network order's class and type to register */
32 nsh_md2_register_option (u16 class,
35 int add_options (u8 * opt,
37 int options (vlib_buffer_t * b,
38 nsh_tlv_header_t * opt),
39 int swap_options (vlib_buffer_t * b,
40 nsh_tlv_header_t * old_opt,
41 nsh_tlv_header_t * new_opt),
42 int pop_options (vlib_buffer_t * b,
43 nsh_tlv_header_t * opt),
44 u8 * trace (u8 * s, nsh_tlv_header_t * opt))
46 nsh_main_t *nm = &nsh_main;
47 nsh_option_map_by_key_t key, *key_copy;
49 nsh_option_map_t *nsh_option;
55 p = hash_get_mem (nm->nsh_option_map_by_key, &key);
56 /* Already registered */
62 pool_get_aligned (nm->nsh_option_mappings, nsh_option,
63 CLIB_CACHE_LINE_BYTES);
64 clib_memset (nsh_option, 0, sizeof (*nsh_option));
65 nsh_option->option_id = nsh_option - nm->nsh_option_mappings;
67 key_copy = clib_mem_alloc (sizeof (*key_copy));
68 clib_memcpy (key_copy, &key, sizeof (*key_copy));
69 hash_set_mem (nm->nsh_option_map_by_key, key_copy,
70 nsh_option - nm->nsh_option_mappings);
72 if (option_size > (MAX_NSH_OPTION_LEN + sizeof (nsh_tlv_header_t)))
76 nm->options_size[nsh_option->option_id] = option_size;
77 nm->add_options[nsh_option->option_id] = add_options;
78 nm->options[nsh_option->option_id] = options;
79 nm->swap_options[nsh_option->option_id] = swap_options;
80 nm->pop_options[nsh_option->option_id] = pop_options;
81 nm->trace[nsh_option->option_id] = trace;
86 /* Uses network order's class and type to lookup */
88 nsh_md2_lookup_option (u16 class, u8 type)
90 nsh_main_t *nm = &nsh_main;
91 nsh_option_map_by_key_t key;
98 p = hash_get_mem (nm->nsh_option_map_by_key, &key);
105 return pool_elt_at_index (nm->nsh_option_mappings, p[0]);
109 /* Uses network order's class and type to unregister */
111 nsh_md2_unregister_option (u16 class,
113 int options (vlib_buffer_t * b,
114 nsh_tlv_header_t * opt),
115 u8 * trace (u8 * s, nsh_tlv_header_t * opt))
117 nsh_main_t *nm = &nsh_main;
118 nsh_option_map_by_key_t key, *key_copy;
121 nsh_option_map_t *nsh_option;
127 p = hash_get_mem (nm->nsh_option_map_by_key, &key);
134 nsh_option = pool_elt_at_index (nm->nsh_option_mappings, p[0]);
135 nm->options[nsh_option->option_id] = NULL;
136 nm->add_options[nsh_option->option_id] = NULL;
137 nm->pop_options[nsh_option->option_id] = NULL;
138 nm->trace[nsh_option->option_id] = NULL;
140 hp = hash_get_pair (nm->nsh_option_map_by_key, &key);
141 key_copy = (void *) (hp->key);
142 hash_unset_mem (nm->nsh_option_map_by_key, &key_copy);
143 clib_mem_free (key_copy);
145 pool_put (nm->nsh_option_mappings, nsh_option);
151 * @brief Formatting function for tracing VXLAN GPE with length
160 format_nsh_tunnel_with_length (u8 * s, va_list * args)
162 u32 dev_instance = va_arg (*args, u32);
163 s = format (s, "unimplemented dev %u", dev_instance);
168 VNET_HW_INTERFACE_CLASS (nsh_hw_class) = {
170 .format_header = format_nsh_tunnel_with_length,
171 .build_rewrite = default_build_rewrite,
172 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
177 nsh_md2_set_next_ioam_export_override (uword next)
179 nsh_main_t *hm = &nsh_main;
180 hm->decap_v4_next_override = next;
185 nsh_init (vlib_main_t * vm)
188 nsh_main_t *nm = &nsh_main;
189 clib_error_t *error = 0;
192 /* Init the main structures from VPP */
194 nm->vnet_main = vnet_get_main ();
196 /* Various state maintenance mappings */
197 nm->nsh_mapping_by_key = hash_create_mem (0, sizeof (u32), sizeof (uword));
199 nm->nsh_mapping_by_mapped_key
200 = hash_create_mem (0, sizeof (u32), sizeof (uword));
202 nm->nsh_entry_by_key = hash_create_mem (0, sizeof (u32), sizeof (uword));
204 nm->nsh_proxy_session_by_key
206 hash_create_mem (0, sizeof (nsh_proxy_session_by_key_t), sizeof (uword));
208 nm->nsh_option_map_by_key
209 = hash_create_mem (0, sizeof (nsh_option_map_by_key_t), sizeof (uword));
211 error = nsh_api_init (vm, nm);
215 node = vlib_get_node_by_name (vm, (u8 *) "nsh-input");
216 nm->nsh_input_node_index = node->index;
218 node = vlib_get_node_by_name (vm, (u8 *) "nsh-proxy");
219 nm->nsh_proxy_node_index = node->index;
221 node = vlib_get_node_by_name (vm, (u8 *) "nsh-classifier");
222 nm->nsh_classifier_node_index = node->index;
224 /* Add dispositions to nodes that feed nsh-input */
225 //alagalah - validate we don't really need to use the node value
227 vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
228 nm->nsh_input_node_index);
229 vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
230 nm->nsh_proxy_node_index);
231 vlib_node_add_next (vm, vxlan4_gpe_input_node.index,
232 nsh_aware_vnf_proxy_node.index);
233 vxlan_gpe_register_decap_protocol (VXLAN_GPE_PROTOCOL_NSH, next_node);
235 vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
236 nm->nsh_input_node_index);
237 vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
238 nm->nsh_proxy_node_index);
239 vlib_node_add_next (vm, vxlan6_gpe_input_node.index,
240 nsh_aware_vnf_proxy_node.index);
242 vlib_node_add_next (vm, gre4_input_node.index, nm->nsh_input_node_index);
243 vlib_node_add_next (vm, gre4_input_node.index, nm->nsh_proxy_node_index);
244 vlib_node_add_next (vm, gre4_input_node.index,
245 nsh_aware_vnf_proxy_node.index);
247 vlib_node_add_next (vm, gre6_input_node.index, nm->nsh_input_node_index);
248 vlib_node_add_next (vm, gre6_input_node.index, nm->nsh_proxy_node_index);
249 vlib_node_add_next (vm, gre6_input_node.index,
250 nsh_aware_vnf_proxy_node.index);
252 /* Add NSH-Proxy support */
253 vlib_node_add_next (vm, vxlan4_input_node.index, nm->nsh_proxy_node_index);
254 vlib_node_add_next (vm, vxlan6_input_node.index, nm->nsh_proxy_node_index);
256 /* Add NSH-Classifier support */
257 vlib_node_add_next (vm, ip4_classify_node.index,
258 nm->nsh_classifier_node_index);
259 vlib_node_add_next (vm, ip6_classify_node.index,
260 nm->nsh_classifier_node_index);
261 vlib_node_add_next (vm, l2_input_classify_node.index,
262 nm->nsh_classifier_node_index);
264 /* Add Ethernet+NSH support */
265 ethernet_register_input_type (vm, ETHERNET_TYPE_NSH,
266 nm->nsh_input_node_index);
271 VLIB_INIT_FUNCTION (nsh_init);
274 VLIB_PLUGIN_REGISTER () = {
275 .version = VPP_BUILD_VER,
276 .description = "Network Service Header (NSH)",
281 * fd.io coding-style-patch-verification: ON
284 * eval: (c-set-style "gnu")