2 * Copyright (c) 2015 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.
16 * snap.h: SNAP definitions
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #ifndef included_snap_h
41 #define included_snap_h
43 #include <vnet/vnet.h>
44 #include <vnet/pg/pg.h>
46 #define foreach_ieee_oui \
47 _ (0x000000, ethernet) \
52 #define _(n,f) IEEE_OUI_##f = n,
57 #define foreach_snap_cisco_protocol \
59 _ (0x0104, port_aggregation_protocol) \
60 _ (0x0105, mls_hello) \
61 _ (0x010b, per_vlan_spanning_tree) \
62 _ (0x010c, vlan_bridge) \
63 _ (0x0111, unidirectional_link_detection) \
68 _ (0x200a, stp_uplink_fast)
72 #define _(n,f) SNAP_cisco_##f = n,
73 foreach_snap_cisco_protocol
75 } snap_cisco_protocol_t;
81 /* OUI: organization unique identifier. */
84 /* Per-OUI protocol. */
96 } snap_oui_and_protocol_t;
100 /* Name vector string. */
103 snap_oui_and_protocol_t oui_and_protocol;
105 /* Node which handles this type. */
108 /* snap-input next index for this type. */
110 } snap_protocol_info_t;
113 snap_header_set_protocol (snap_header_t * h, snap_oui_and_protocol_t * p)
115 u16 protocol = p->protocol;
117 h->protocol = clib_host_to_net_u16 (protocol);
118 h->oui[0] = (oui >> 16) & 0xff;
119 h->oui[1] = (oui >> 8) & 0xff;
120 h->oui[2] = (oui >> 0) & 0xff;
123 #define foreach_snap_error \
124 _ (NONE, "no error") \
125 _ (UNKNOWN_PROTOCOL, "unknown oui/snap protocol")
129 #define _(f,s) SNAP_ERROR_##f,
137 vlib_main_t *vlib_main;
139 /* Vector of known SNAP oui/protocol pairs. */
140 snap_protocol_info_t *protocols;
142 /* Hash table mapping oui/protocol to protocol index. */
143 mhash_t protocol_hash;
145 /* Hash table mapping protocol by name. */
146 uword *protocol_info_by_name;
150 snap_header_get_oui (snap_header_t * h)
152 return (h->oui[0] << 16) | (h->oui[1] << 8) | h->oui[2];
155 always_inline snap_protocol_info_t *
156 snap_get_protocol_info (snap_main_t * sm, snap_header_t * h)
158 snap_oui_and_protocol_t key;
161 key.oui = snap_header_get_oui (h);
162 key.protocol = h->protocol;
164 p = mhash_get (&sm->protocol_hash, &key);
165 return p ? vec_elt_at_index (sm->protocols, p[0]) : 0;
168 extern snap_main_t snap_main;
170 /* Register given node index to take input for given snap type. */
172 snap_register_input_protocol (vlib_main_t * vm,
174 u32 ieee_oui, u16 protocol, u32 node_index);
176 format_function_t format_snap_protocol;
177 format_function_t format_snap_header;
178 format_function_t format_snap_header_with_length;
180 /* Parse snap protocol as 0xXXXX or protocol name. */
181 unformat_function_t unformat_snap_protocol;
183 /* Parse snap header. */
184 unformat_function_t unformat_snap_header;
185 unformat_function_t unformat_pg_snap_header;
188 snap_setup_node (vlib_main_t * vm, u32 node_index)
190 vlib_node_t *n = vlib_get_node (vm, node_index);
191 pg_node_t *pn = pg_get_node (node_index);
193 n->format_buffer = format_snap_header_with_length;
194 n->unformat_buffer = unformat_snap_header;
195 pn->unformat_edit = unformat_pg_snap_header;
198 #endif /* included_snap_h */
201 * fd.io coding-style-patch-verification: ON
204 * eval: (c-set-style "gnu")