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 : * srp/pg.c: packet generator srp interface
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 : #include <vlib/vlib.h>
41 : #include <vnet/pg/pg.h>
42 : #include <vnet/srp/srp.h>
43 : #include <vnet/ethernet/ethernet.h>
44 :
45 : typedef struct {
46 : pg_edit_t ttl;
47 : pg_edit_t is_inner_ring;
48 : pg_edit_t mode;
49 : pg_edit_t priority;
50 : pg_edit_t parity;
51 : pg_edit_t type;
52 : pg_edit_t src_address;
53 : pg_edit_t dst_address;
54 : } pg_srp_header_t;
55 :
56 : static inline void
57 0 : pg_srp_header_init (pg_srp_header_t * e)
58 : {
59 0 : pg_edit_init (&e->ttl, srp_and_ethernet_header_t, srp.ttl);
60 0 : pg_edit_init_bitfield (&e->is_inner_ring, srp_and_ethernet_header_t,
61 : srp.as_u16,
62 : 7, 1);
63 0 : pg_edit_init_bitfield (&e->mode, srp_and_ethernet_header_t,
64 : srp.as_u16,
65 : 4, 3);
66 0 : pg_edit_init_bitfield (&e->priority, srp_and_ethernet_header_t,
67 : srp.as_u16,
68 : 1, 3);
69 0 : pg_edit_init_bitfield (&e->parity, srp_and_ethernet_header_t,
70 : srp.as_u16,
71 : 0, 1);
72 0 : pg_edit_init (&e->type, srp_and_ethernet_header_t, ethernet.type);
73 0 : pg_edit_init (&e->src_address, srp_and_ethernet_header_t, ethernet.src_address);
74 0 : pg_edit_init (&e->dst_address, srp_and_ethernet_header_t, ethernet.dst_address);
75 0 : }
76 :
77 : uword
78 0 : unformat_pg_srp_header (unformat_input_t * input, va_list * args)
79 : {
80 0 : pg_stream_t * s = va_arg (*args, pg_stream_t *);
81 : pg_srp_header_t * e;
82 : u32 error, group_index;
83 :
84 0 : e = pg_create_edit_group (s, sizeof (e[0]), sizeof (srp_header_t),
85 : &group_index);
86 0 : pg_srp_header_init (e);
87 :
88 0 : error = 1;
89 0 : if (! unformat (input, "%U: %U -> %U",
90 : unformat_pg_edit,
91 : unformat_ethernet_type_net_byte_order, &e->type,
92 : unformat_pg_edit,
93 : unformat_ethernet_address, &e->src_address,
94 : unformat_pg_edit,
95 : unformat_ethernet_address, &e->dst_address))
96 0 : goto done;
97 :
98 : {
99 : srp_header_t h;
100 :
101 0 : h.as_u16 = 0;
102 0 : h.mode = SRP_MODE_data;
103 0 : h.ttl = 255;
104 0 : h.parity = count_set_bits (h.as_u16) ^ 1;
105 :
106 0 : pg_edit_set_fixed (&e->mode, h.mode);
107 0 : pg_edit_set_fixed (&e->ttl, h.ttl);
108 0 : pg_edit_set_fixed (&e->is_inner_ring, h.is_inner_ring);
109 0 : pg_edit_set_fixed (&e->priority, h.priority);
110 0 : pg_edit_set_fixed (&e->parity, h.parity);
111 : }
112 :
113 0 : error = 0;
114 0 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
115 : {
116 0 : if (unformat (input, "mode %U",
117 : unformat_pg_edit,
118 : unformat_pg_number, &e->mode))
119 : ;
120 0 : else if (unformat (input, "ttl %U",
121 : unformat_pg_edit,
122 : unformat_pg_number, &e->ttl))
123 : ;
124 0 : else if (unformat (input, "priority %U",
125 : unformat_pg_edit,
126 : unformat_pg_number, &e->priority))
127 : ;
128 : else
129 0 : break;
130 : }
131 :
132 : {
133 0 : ethernet_main_t * em = ðernet_main;
134 0 : ethernet_type_info_t * ti = 0;
135 0 : pg_node_t * pg_node = 0;
136 :
137 0 : if (e->type.type == PG_EDIT_FIXED)
138 : {
139 0 : u16 t = *(u16 *) e->type.values[PG_EDIT_LO];
140 0 : ti = ethernet_get_type_info (em, clib_net_to_host_u16 (t));
141 0 : if (ti && ti->node_index != ~0)
142 0 : pg_node = pg_get_node (ti->node_index);
143 : }
144 :
145 0 : if (pg_node && pg_node->unformat_edit
146 0 : && unformat_user (input, pg_node->unformat_edit, s))
147 : ;
148 0 : else if (! unformat_user (input, unformat_pg_payload, s))
149 0 : goto done;
150 : }
151 :
152 0 : done:
153 0 : if (error)
154 0 : pg_free_edit_group (s);
155 0 : return error == 0;
156 : }
157 :
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