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.c: osi support
17 : *
18 : * Copyright (c) 2010 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 : #include <vnet/vnet.h>
41 : #include <vnet/osi/osi.h>
42 :
43 : /* Global main structure. */
44 : osi_main_t osi_main;
45 :
46 : u8 *
47 0 : format_osi_protocol (u8 * s, va_list * args)
48 : {
49 0 : osi_protocol_t p = va_arg (*args, u32);
50 0 : osi_main_t *pm = &osi_main;
51 0 : osi_protocol_info_t *pi = osi_get_protocol_info (pm, p);
52 :
53 0 : if (pi)
54 0 : s = format (s, "%s", pi->name);
55 : else
56 0 : s = format (s, "0x%02x", p);
57 :
58 0 : return s;
59 : }
60 :
61 : u8 *
62 0 : format_osi_header_with_length (u8 * s, va_list * args)
63 : {
64 0 : osi_main_t *pm = &osi_main;
65 0 : osi_header_t *h = va_arg (*args, osi_header_t *);
66 0 : u32 max_header_bytes = va_arg (*args, u32);
67 0 : osi_protocol_t p = h->protocol;
68 : u32 indent, header_bytes;
69 :
70 0 : header_bytes = sizeof (h[0]);
71 0 : if (max_header_bytes != 0 && header_bytes > max_header_bytes)
72 0 : return format (s, "osi header truncated");
73 :
74 0 : indent = format_get_indent (s);
75 :
76 0 : s = format (s, "OSI %U", format_osi_protocol, p);
77 :
78 0 : if (max_header_bytes != 0 && header_bytes > max_header_bytes)
79 : {
80 0 : osi_protocol_info_t *pi = osi_get_protocol_info (pm, p);
81 0 : vlib_node_t *node = vlib_get_node (pm->vlib_main, pi->node_index);
82 0 : if (node->format_buffer)
83 0 : s = format (s, "\n%U%U",
84 : format_white_space, indent,
85 0 : node->format_buffer, (void *) (h + 1),
86 : max_header_bytes - header_bytes);
87 : }
88 :
89 0 : return s;
90 : }
91 :
92 : u8 *
93 0 : format_osi_header (u8 * s, va_list * args)
94 : {
95 0 : osi_header_t *h = va_arg (*args, osi_header_t *);
96 0 : return format (s, "%U", format_osi_header_with_length, h, 0);
97 : }
98 :
99 : /* Returns osi protocol as an int in host byte order. */
100 : uword
101 0 : unformat_osi_protocol (unformat_input_t * input, va_list * args)
102 : {
103 0 : u8 *result = va_arg (*args, u8 *);
104 0 : osi_main_t *pm = &osi_main;
105 : int p, i;
106 :
107 : /* Numeric type. */
108 0 : if (unformat (input, "0x%x", &p) || unformat (input, "%d", &p))
109 : {
110 0 : if (p >= (1 << 8))
111 0 : return 0;
112 0 : *result = p;
113 0 : return 1;
114 : }
115 :
116 : /* Named type. */
117 0 : if (unformat_user (input, unformat_vlib_number_by_name,
118 : pm->protocol_info_by_name, &i))
119 : {
120 0 : osi_protocol_info_t *pi = vec_elt_at_index (pm->protocol_infos, i);
121 0 : *result = pi->protocol;
122 0 : return 1;
123 : }
124 :
125 0 : return 0;
126 : }
127 :
128 : uword
129 0 : unformat_osi_header (unformat_input_t * input, va_list * args)
130 : {
131 0 : u8 **result = va_arg (*args, u8 **);
132 0 : osi_header_t _h, *h = &_h;
133 : u8 p;
134 :
135 0 : if (!unformat (input, "%U", unformat_osi_protocol, &p))
136 0 : return 0;
137 :
138 0 : h->protocol = p;
139 :
140 : /* Add header to result. */
141 : {
142 : void *p;
143 0 : u32 n_bytes = sizeof (h[0]);
144 :
145 0 : vec_add2 (*result, p, n_bytes);
146 0 : clib_memcpy (p, h, n_bytes);
147 : }
148 :
149 0 : return 1;
150 : }
151 :
152 : static void
153 11500 : add_protocol (osi_main_t * pm, osi_protocol_t protocol, char *protocol_name)
154 : {
155 : osi_protocol_info_t *pi;
156 : u32 i;
157 :
158 11500 : vec_add2 (pm->protocol_infos, pi, 1);
159 11500 : i = pi - pm->protocol_infos;
160 :
161 11500 : pi->name = protocol_name;
162 11500 : pi->protocol = protocol;
163 11500 : pi->next_index = pi->node_index = ~0;
164 :
165 11500 : hash_set (pm->protocol_info_by_protocol, protocol, i);
166 23000 : hash_set_mem (pm->protocol_info_by_name, pi->name, i);
167 11500 : }
168 :
169 : static clib_error_t *
170 575 : osi_init (vlib_main_t * vm)
171 : {
172 575 : clib_error_t *error = 0;
173 575 : osi_main_t *pm = &osi_main;
174 :
175 : /* init order dependency: llc_init -> osi_init */
176 575 : if ((error = vlib_call_init_function (vm, llc_init)))
177 0 : return error;
178 :
179 575 : clib_memset (pm, 0, sizeof (pm[0]));
180 575 : pm->vlib_main = vm;
181 :
182 575 : pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
183 575 : pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
184 :
185 : #define _(f,n) add_protocol (pm, OSI_PROTOCOL_##f, #f);
186 575 : foreach_osi_protocol;
187 : #undef _
188 :
189 575 : return vlib_call_init_function (vm, osi_input_init);
190 : }
191 :
192 57599 : VLIB_INIT_FUNCTION (osi_init);
193 :
194 :
195 : /*
196 : * fd.io coding-style-patch-verification: ON
197 : *
198 : * Local Variables:
199 : * eval: (c-set-style "gnu")
200 : * End:
201 : */
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