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.
18 * Copyright (c) 2010 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 #include <vnet/vnet.h>
41 #include <vnet/hdlc/hdlc.h>
43 /* Global main structure. */
44 hdlc_main_t hdlc_main;
46 u8 * format_hdlc_protocol (u8 * s, va_list * args)
48 hdlc_protocol_t p = va_arg (*args, u32);
49 hdlc_main_t * pm = &hdlc_main;
50 hdlc_protocol_info_t * pi = hdlc_get_protocol_info (pm, p);
53 s = format (s, "%s", pi->name);
55 s = format (s, "0x%04x", p);
60 u8 * format_hdlc_header_with_length (u8 * s, va_list * args)
62 hdlc_main_t * pm = &hdlc_main;
63 hdlc_header_t * h = va_arg (*args, hdlc_header_t *);
64 u32 max_header_bytes = va_arg (*args, u32);
65 hdlc_protocol_t p = clib_net_to_host_u16 (h->protocol);
66 u32 indent, header_bytes;
68 header_bytes = sizeof (h[0]);
69 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
70 return format (s, "hdlc header truncated");
72 indent = format_get_indent (s);
74 s = format (s, "HDLC %U", format_hdlc_protocol, p);
76 if (h->address != 0xff)
77 s = format (s, ", address 0x%02x", h->address);
78 if (h->control != 0x03)
79 s = format (s, ", control 0x%02x", h->control);
81 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
83 hdlc_protocol_info_t * pi = hdlc_get_protocol_info (pm, p);
84 vlib_node_t * node = vlib_get_node (pm->vlib_main, pi->node_index);
85 if (node->format_buffer)
86 s = format (s, "\n%U%U",
87 format_white_space, indent,
88 node->format_buffer, (void *) (h + 1),
89 max_header_bytes - header_bytes);
95 u8 * format_hdlc_header (u8 * s, va_list * args)
97 hdlc_header_t * h = va_arg (*args, hdlc_header_t *);
98 return format (s, "%U", format_hdlc_header_with_length, h, 0);
101 /* Returns hdlc protocol as an int in host byte order. */
103 unformat_hdlc_protocol_host_byte_order (unformat_input_t * input,
106 u16 * result = va_arg (*args, u16 *);
107 hdlc_main_t * pm = &hdlc_main;
111 if (unformat (input, "0x%x", &p)
112 || unformat (input, "%d", &p))
121 if (unformat_user (input, unformat_vlib_number_by_name,
122 pm->protocol_info_by_name, &i))
124 hdlc_protocol_info_t * pi = vec_elt_at_index (pm->protocol_infos, i);
125 *result = pi->protocol;
133 unformat_hdlc_protocol_net_byte_order (unformat_input_t * input,
136 u16 * result = va_arg (*args, u16 *);
137 if (! unformat_user (input, unformat_hdlc_protocol_host_byte_order, result))
139 *result = clib_host_to_net_u16 ((u16) *result);
144 unformat_hdlc_header (unformat_input_t * input, va_list * args)
146 u8 ** result = va_arg (*args, u8 **);
147 hdlc_header_t _h, * h = &_h;
150 if (! unformat (input, "%U",
151 unformat_hdlc_protocol_host_byte_order, &p))
156 h->protocol = clib_host_to_net_u16 (p);
158 /* Add header to result. */
161 u32 n_bytes = sizeof (h[0]);
163 vec_add2 (*result, p, n_bytes);
164 clib_memcpy (p, h, n_bytes);
171 hdlc_build_rewrite (vnet_main_t * vnm,
173 vnet_link_t link_type,
174 const void *dst_address)
178 hdlc_protocol_t protocol;
181 #define _(a,b) case VNET_LINK_##a: protocol = HDLC_PROTOCOL_##b; break
184 _ (MPLS, mpls_unicast);
190 vec_validate(rewrite, sizeof(*h)-1);
191 h = (hdlc_header_t *)rewrite;
194 h->protocol = clib_host_to_net_u16 (protocol);
199 VNET_HW_INTERFACE_CLASS (hdlc_hw_interface_class) = {
201 .format_header = format_hdlc_header_with_length,
202 .unformat_header = unformat_hdlc_header,
203 .build_rewrite = hdlc_build_rewrite,
204 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
207 static void add_protocol (hdlc_main_t * pm,
208 hdlc_protocol_t protocol,
209 char * protocol_name)
211 hdlc_protocol_info_t * pi;
214 vec_add2 (pm->protocol_infos, pi, 1);
215 i = pi - pm->protocol_infos;
217 pi->name = protocol_name;
218 pi->protocol = protocol;
219 pi->next_index = pi->node_index = ~0;
221 hash_set (pm->protocol_info_by_protocol, protocol, i);
222 hash_set_mem (pm->protocol_info_by_name, pi->name, i);
225 static clib_error_t * hdlc_init (vlib_main_t * vm)
227 hdlc_main_t * pm = &hdlc_main;
229 memset (pm, 0, sizeof (pm[0]));
232 pm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
233 pm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
235 #define _(n,s) add_protocol (pm, HDLC_PROTOCOL_##s, #s);
236 foreach_hdlc_protocol
239 return vlib_call_init_function (vm, hdlc_input_init);
242 VLIB_INIT_FUNCTION (hdlc_init);
244 hdlc_main_t * hdlc_get_main (vlib_main_t * vm)
246 vlib_call_init_function (vm, hdlc_init);