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 : * ethernet_pg.c: packet generator ethernet 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/ethernet/ethernet.h>
43 :
44 : typedef struct
45 : {
46 : pg_edit_t type;
47 : pg_edit_t src_address;
48 : pg_edit_t dst_address;
49 : } pg_ethernet_header_t;
50 :
51 : static inline void
52 6 : pg_ethernet_header_init (pg_ethernet_header_t * e)
53 : {
54 6 : pg_edit_init (&e->type, ethernet_header_t, type);
55 6 : pg_edit_init (&e->src_address, ethernet_header_t, src_address);
56 6 : pg_edit_init (&e->dst_address, ethernet_header_t, dst_address);
57 6 : }
58 :
59 : typedef struct
60 : {
61 : pg_edit_t type;
62 : pg_edit_t id;
63 : pg_edit_t cfi;
64 : pg_edit_t priority;
65 : } pg_ethernet_vlan_header_t;
66 :
67 : static inline void
68 0 : pg_ethernet_vlan_header_init (pg_ethernet_vlan_header_t * v, int vlan_index)
69 : {
70 0 : ASSERT (vlan_index < ARRAY_LEN (((ethernet_max_header_t *) 0)->vlan));
71 0 : pg_edit_init (&v->type, ethernet_max_header_t, vlan[vlan_index].type);
72 :
73 0 : pg_edit_init_bitfield (&v->id, ethernet_max_header_t,
74 : vlan[vlan_index].priority_cfi_and_id, 0, 12);
75 0 : pg_edit_init_bitfield (&v->cfi, ethernet_max_header_t,
76 : vlan[vlan_index].priority_cfi_and_id, 12, 1);
77 0 : pg_edit_init_bitfield (&v->priority, ethernet_max_header_t,
78 : vlan[vlan_index].priority_cfi_and_id, 13, 3);
79 0 : }
80 :
81 : uword
82 6 : unformat_pg_ethernet_header (unformat_input_t * input, va_list * args)
83 : {
84 6 : pg_stream_t *s = va_arg (*args, pg_stream_t *);
85 : pg_ethernet_header_t *e;
86 : pg_ethernet_vlan_header_t *v;
87 : pg_edit_t *ether_type_edit;
88 : u32 n_vlan, error, group_index;
89 :
90 6 : e = pg_create_edit_group (s, sizeof (e[0]), sizeof (ethernet_header_t),
91 : &group_index);
92 6 : pg_ethernet_header_init (e);
93 6 : error = 1;
94 :
95 6 : if (!unformat (input, "%U: %U -> %U",
96 : unformat_pg_edit,
97 : unformat_ethernet_type_net_byte_order, &e->type,
98 : unformat_pg_edit,
99 : unformat_ethernet_address, &e->src_address,
100 : unformat_pg_edit,
101 : unformat_ethernet_address, &e->dst_address))
102 0 : goto done;
103 :
104 6 : n_vlan = 0;
105 6 : while (unformat (input, "vlan"))
106 : {
107 0 : v = pg_add_edits (s, sizeof (v[0]), sizeof (ethernet_vlan_header_t),
108 : group_index);
109 0 : pg_ethernet_vlan_header_init (v, n_vlan);
110 :
111 0 : if (!unformat_user (input, unformat_pg_edit,
112 : unformat_pg_number, &v->id))
113 0 : goto done;
114 :
115 0 : if (!unformat (input, "priority %U", unformat_pg_edit,
116 : unformat_pg_number, &v->priority))
117 0 : pg_edit_set_fixed (&v->priority, 0);
118 :
119 0 : if (!unformat (input, "cfi %U", unformat_pg_edit,
120 : unformat_pg_number, &v->cfi))
121 0 : pg_edit_set_fixed (&v->cfi, 0);
122 :
123 : /* Too many vlans given. */
124 0 : if (n_vlan >= 2)
125 0 : goto done;
126 :
127 0 : n_vlan++;
128 : }
129 :
130 : /* Address of e may have changed due to vlan edits being added */
131 6 : e = pg_get_edit_group (s, group_index);
132 6 : v = (void *) (e + 1);
133 :
134 : /* Correct types for vlan packets. */
135 6 : ether_type_edit = &e->type;
136 6 : if (n_vlan > 0)
137 : {
138 : int i;
139 :
140 0 : ether_type_edit = &v[n_vlan - 1].type;
141 0 : pg_edit_copy_type_and_values (ether_type_edit, &e->type);
142 0 : pg_edit_set_fixed (&e->type, ETHERNET_TYPE_VLAN);
143 :
144 0 : for (i = 0; i < n_vlan - 1; i++)
145 0 : pg_edit_set_fixed (&v[i].type, ETHERNET_TYPE_VLAN);
146 : }
147 :
148 : {
149 6 : ethernet_main_t *em = ðernet_main;
150 6 : ethernet_type_info_t *ti = 0;
151 6 : pg_node_t *pg_node = 0;
152 :
153 6 : if (ether_type_edit->type == PG_EDIT_FIXED)
154 : {
155 6 : u16 t = *(u16 *) ether_type_edit->values[PG_EDIT_LO];
156 6 : ti = ethernet_get_type_info (em, clib_net_to_host_u16 (t));
157 6 : if (ti && ti->node_index != ~0)
158 6 : pg_node = pg_get_node (ti->node_index);
159 : }
160 :
161 6 : if (pg_node && pg_node->unformat_edit
162 6 : && unformat_user (input, pg_node->unformat_edit, s))
163 : ;
164 0 : else if (!unformat_user (input, unformat_pg_payload, s))
165 0 : goto done;
166 : }
167 :
168 6 : error = 0;
169 :
170 6 : done:
171 6 : if (error)
172 0 : pg_free_edit_group (s);
173 6 : return error == 0;
174 : }
175 :
176 :
177 : /*
178 : * fd.io coding-style-patch-verification: ON
179 : *
180 : * Local Variables:
181 : * eval: (c-set-style "gnu")
182 : * End:
183 : */
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