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Vector Packet Processing
pg.c
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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 {
50 
51 static inline void
53 {
54  pg_edit_init (&e->type, ethernet_header_t, type);
55  pg_edit_init (&e->src_address, ethernet_header_t, src_address);
56  pg_edit_init (&e->dst_address, ethernet_header_t, dst_address);
57 }
58 
59 typedef struct
60 {
66 
67 static inline void
69 {
70  ASSERT (vlan_index < ARRAY_LEN (((ethernet_max_header_t *) 0)->vlan));
71  pg_edit_init (&v->type, ethernet_max_header_t, vlan[vlan_index].type);
72 
74  vlan[vlan_index].priority_cfi_and_id, 0, 12);
76  vlan[vlan_index].priority_cfi_and_id, 12, 1);
78  vlan[vlan_index].priority_cfi_and_id, 13, 3);
79 }
80 
81 uword
83 {
84  pg_stream_t *s = va_arg (*args, pg_stream_t *);
87  pg_edit_t *ether_type_edit;
88  u32 n_vlan, error, group_index;
89 
90  e = pg_create_edit_group (s, sizeof (e[0]), sizeof (ethernet_header_t),
91  &group_index);
93  error = 1;
94 
95  if (!unformat (input, "%U: %U -> %U",
102  goto done;
103 
104  n_vlan = 0;
105  while (unformat (input, "vlan"))
106  {
107  v = pg_add_edits (s, sizeof (v[0]), sizeof (ethernet_vlan_header_t),
108  group_index);
109  pg_ethernet_vlan_header_init (v, n_vlan);
110 
111  if (!unformat_user (input, unformat_pg_edit,
112  unformat_pg_number, &v->id))
113  goto done;
114 
115  if (!unformat (input, "priority %U", unformat_pg_edit,
117  pg_edit_set_fixed (&v->priority, 0);
118 
119  if (!unformat (input, "cfi %U", unformat_pg_edit,
120  unformat_pg_number, &v->cfi))
121  pg_edit_set_fixed (&v->cfi, 0);
122 
123  /* Too many vlans given. */
124  if (n_vlan >= 2)
125  goto done;
126 
127  n_vlan++;
128  }
129 
130  /* Address of e may have changed due to vlan edits being added */
131  e = pg_get_edit_group (s, group_index);
132  v = (void *) (e + 1);
133 
134  /* Correct types for vlan packets. */
135  ether_type_edit = &e->type;
136  if (n_vlan > 0)
137  {
138  int i;
139 
140  ether_type_edit = &v[n_vlan - 1].type;
141  pg_edit_copy_type_and_values (ether_type_edit, &e->type);
142  pg_edit_set_fixed (&e->type, ETHERNET_TYPE_VLAN);
143 
144  for (i = 0; i < n_vlan - 1; i++)
145  pg_edit_set_fixed (&v[i].type, ETHERNET_TYPE_VLAN);
146  }
147 
148  {
150  ethernet_type_info_t *ti = 0;
151  pg_node_t *pg_node = 0;
152 
153  if (ether_type_edit->type == PG_EDIT_FIXED)
154  {
155  u16 t = *(u16 *) ether_type_edit->values[PG_EDIT_LO];
156  ti = ethernet_get_type_info (em, clib_net_to_host_u16 (t));
157  if (ti && ti->node_index != ~0)
158  pg_node = pg_get_node (ti->node_index);
159  }
160 
161  if (pg_node && pg_node->unformat_edit
162  && unformat_user (input, pg_node->unformat_edit, s))
163  ;
164  else if (!unformat_user (input, unformat_pg_payload, s))
165  goto done;
166  }
167 
168  error = 0;
169 
170 done:
171  if (error)
172  pg_free_edit_group (s);
173  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  */
Definition: edit.h:64
uword unformat_ethernet_type_net_byte_order(unformat_input_t *input, va_list *args)
Definition: format.c:265
#define PG_EDIT_LO
Definition: edit.h:83
uword unformat_pg_ethernet_header(unformat_input_t *input, va_list *args)
Definition: pg.c:82
static void * pg_get_edit_group(pg_stream_t *s, u32 group_index)
Definition: pg.h:265
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:153
pg_edit_t dst_address
Definition: pg.c:48
int i
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
uword unformat_pg_edit(unformat_input_t *input, va_list *args)
Definition: edit.c:106
static void pg_edit_copy_type_and_values(pg_edit_t *dst, pg_edit_t *src)
Definition: edit.h:160
static void pg_ethernet_header_init(pg_ethernet_header_t *e)
Definition: pg.c:52
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:356
pg_edit_t id
Definition: pg.c:62
ethernet_main_t ethernet_main
Definition: init.c:45
static void * pg_add_edits(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 group_index)
Definition: pg.h:251
uword unformat_pg_payload(unformat_input_t *input, va_list *args)
Definition: edit.c:127
pg_edit_type_t type
Definition: edit.h:66
unsigned int u32
Definition: types.h:88
#define pg_edit_init(e, type, field)
Definition: edit.h:116
static void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:231
pg_edit_t type
Definition: pg.c:46
u8 * values[2]
Definition: edit.h:82
static void pg_ethernet_vlan_header_init(pg_ethernet_vlan_header_t *v, int vlan_index)
Definition: pg.c:68
static ethernet_type_info_t * ethernet_get_type_info(ethernet_main_t *em, ethernet_type_t type)
Definition: ethernet.h:311
#define v
Definition: acl.c:491
struct _unformat_input_t unformat_input_t
unsigned short u16
Definition: types.h:57
#define pg_edit_init_bitfield(e, type, field, field_offset, field_n_bits)
Definition: edit.h:98
pg_edit_t type
Definition: pg.c:61
unformat_function_t * unformat_edit
Definition: pg.h:313
#define ARRAY_LEN(x)
Definition: clib.h:59
pg_edit_t priority
Definition: pg.c:64
uword unformat_ethernet_address(unformat_input_t *input, va_list *args)
Definition: format.c:227
#define ASSERT(truth)
static void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:284
Definition: pg.h:96
pg_edit_t cfi
Definition: pg.c:63
u64 uword
Definition: types.h:112
pg_edit_t src_address
Definition: pg.c:47
uword unformat_pg_number(unformat_input_t *input, va_list *args)
Definition: edit.c:85
Definition: pg.h:310
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972