Line data Source code
1 : /*
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:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
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.
14 : */
15 : /*
16 : * osi.h: OSI definitions
17 : *
18 : * Copyright (c) 2008 Eliot Dresselhaus
19 : *
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:
27 : *
28 : * The above copyright notice and this permission notice shall be
29 : * included in all copies or substantial portions of the Software.
30 : *
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.
38 : */
39 :
40 : #ifndef included_osi_h
41 : #define included_osi_h
42 :
43 : #include <vnet/vnet.h>
44 :
45 : #define foreach_osi_protocol \
46 : _ (null, 0x0) \
47 : _ (x_29, 0x01) \
48 : _ (x_633, 0x03) \
49 : _ (q_931, 0x08) \
50 : _ (q_933, 0x08) \
51 : _ (q_2931, 0x09) \
52 : _ (q_2119, 0x0c) \
53 : _ (snap, 0x80) \
54 : _ (clnp, 0x81) \
55 : _ (esis, 0x82) \
56 : _ (isis, 0x83) \
57 : _ (idrp, 0x85) \
58 : _ (x25_esis, 0x8a) \
59 : _ (iso10030, 0x8c) \
60 : _ (iso11577, 0x8d) \
61 : _ (ip6, 0x8e) \
62 : _ (compressed, 0xb0) \
63 : _ (sndcf, 0xc1) \
64 : _ (ip4, 0xcc) \
65 : _ (ppp, 0xcf)
66 :
67 : typedef enum
68 : {
69 : #define _(f,n) OSI_PROTOCOL_##f = n,
70 : foreach_osi_protocol
71 : #undef _
72 : } osi_protocol_t;
73 :
74 : typedef struct
75 : {
76 : u8 protocol;
77 :
78 : u8 payload[0];
79 : } osi_header_t;
80 :
81 : typedef struct
82 : {
83 : /* Name (a c string). */
84 : char *name;
85 :
86 : /* OSI protocol (SAP type). */
87 : osi_protocol_t protocol;
88 :
89 : /* Node which handles this type. */
90 : u32 node_index;
91 :
92 : /* Next index for this type. */
93 : u32 next_index;
94 : } osi_protocol_info_t;
95 :
96 : #define foreach_osi_error \
97 : _ (NONE, "no error") \
98 : _ (UNKNOWN_PROTOCOL, "unknown osi protocol")
99 :
100 : typedef enum
101 : {
102 : #define _(f,s) OSI_ERROR_##f,
103 : foreach_osi_error
104 : #undef _
105 : OSI_N_ERROR,
106 : } osi_error_t;
107 :
108 : typedef struct
109 : {
110 : vlib_main_t *vlib_main;
111 :
112 : osi_protocol_info_t *protocol_infos;
113 :
114 : /* Hash tables mapping name/protocol to protocol info index. */
115 : uword *protocol_info_by_name, *protocol_info_by_protocol;
116 :
117 : /* osi-input next index indexed by protocol. */
118 : u8 input_next_by_protocol[256];
119 : } osi_main_t;
120 :
121 : always_inline osi_protocol_info_t *
122 0 : osi_get_protocol_info (osi_main_t * m, osi_protocol_t protocol)
123 : {
124 0 : uword *p = hash_get (m->protocol_info_by_protocol, protocol);
125 0 : return p ? vec_elt_at_index (m->protocol_infos, p[0]) : 0;
126 : }
127 :
128 : extern osi_main_t osi_main;
129 :
130 : /* Register given node index to take input for given osi type. */
131 : void osi_register_input_protocol (osi_protocol_t protocol, u32 node_index);
132 :
133 : format_function_t format_osi_protocol;
134 : format_function_t format_osi_header;
135 : format_function_t format_osi_header_with_length;
136 :
137 : /* Parse osi protocol as 0xXXXX or protocol name. */
138 : unformat_function_t unformat_osi_protocol;
139 :
140 : /* Parse osi header. */
141 : unformat_function_t unformat_osi_header;
142 : unformat_function_t unformat_pg_osi_header;
143 :
144 : void osi_register_input_protocol (osi_protocol_t protocol, u32 node_index);
145 :
146 : format_function_t format_osi_header;
147 :
148 : #endif /* included_osi_h */
149 :
150 : /*
151 : * fd.io coding-style-patch-verification: ON
152 : *
153 : * Local Variables:
154 : * eval: (c-set-style "gnu")
155 : * End:
156 : */
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