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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  * 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 {
55 
56 static inline void
58 {
61  srp.as_u16,
62  7, 1);
64  srp.as_u16,
65  4, 3);
67  srp.as_u16,
68  1, 3);
70  srp.as_u16,
71  0, 1);
72  pg_edit_init (&e->type, srp_and_ethernet_header_t, ethernet.type);
73  pg_edit_init (&e->src_address, srp_and_ethernet_header_t, ethernet.src_address);
74  pg_edit_init (&e->dst_address, srp_and_ethernet_header_t, ethernet.dst_address);
75 }
76 
77 uword
78 unformat_pg_srp_header (unformat_input_t * input, va_list * args)
79 {
80  pg_stream_t * s = va_arg (*args, pg_stream_t *);
81  pg_srp_header_t * e;
82  u32 error, group_index;
83 
84  e = pg_create_edit_group (s, sizeof (e[0]), sizeof (srp_header_t),
85  &group_index);
87 
88  error = 1;
89  if (! unformat (input, "%U: %U -> %U",
96  goto done;
97 
98  {
99  srp_header_t h;
100 
101  h.as_u16 = 0;
102  h.mode = SRP_MODE_data;
103  h.ttl = 255;
104  h.parity = count_set_bits (h.as_u16) ^ 1;
105 
106  pg_edit_set_fixed (&e->mode, h.mode);
107  pg_edit_set_fixed (&e->ttl, h.ttl);
108  pg_edit_set_fixed (&e->is_inner_ring, h.is_inner_ring);
109  pg_edit_set_fixed (&e->priority, h.priority);
110  pg_edit_set_fixed (&e->parity, h.parity);
111  }
112 
113  error = 0;
115  {
116  if (unformat (input, "mode %U",
118  unformat_pg_number, &e->mode))
119  ;
120  else if (unformat (input, "ttl %U",
122  unformat_pg_number, &e->ttl))
123  ;
124  else if (unformat (input, "priority %U",
127  ;
128  else
129  break;
130  }
131 
132  {
134  ethernet_type_info_t * ti = 0;
135  pg_node_t * pg_node = 0;
136 
137  if (e->type.type == PG_EDIT_FIXED)
138  {
139  u16 t = *(u16 *) e->type.values[PG_EDIT_LO];
140  ti = ethernet_get_type_info (em, clib_net_to_host_u16 (t));
141  if (ti && ti->node_index != ~0)
142  pg_node = pg_get_node (ti->node_index);
143  }
144 
145  if (pg_node && pg_node->unformat_edit
146  && unformat_user (input, pg_node->unformat_edit, s))
147  ;
148  else if (! unformat_user (input, unformat_pg_payload, s))
149  goto done;
150  }
151 
152  done:
153  if (error)
154  pg_free_edit_group (s);
155  return error == 0;
156 }
157 
Definition: edit.h:64
uword unformat_ethernet_type_net_byte_order(unformat_input_t *input, va_list *args)
Definition: format.c:265
pg_edit_t is_inner_ring
Definition: pg.c:47
#define PG_EDIT_LO
Definition: edit.h:83
uword unformat_pg_srp_header(unformat_input_t *input, va_list *args)
Definition: pg.c:78
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:153
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
pg_edit_t dst_address
Definition: pg.c:53
static pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:350
pg_edit_t mode
Definition: pg.c:48
ethernet_main_t ethernet_main
Definition: ethernet.h:273
uword unformat_pg_payload(unformat_input_t *input, va_list *args)
Definition: edit.c:127
pg_edit_type_t type
Definition: edit.h:66
#define pg_edit_init(e, type, field)
Definition: edit.h:116
pg_edit_t src_address
Definition: pg.c:52
static void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:225
u8 * values[2]
Definition: edit.h:82
static ethernet_type_info_t * ethernet_get_type_info(ethernet_main_t *em, ethernet_type_t type)
Definition: ethernet.h:276
struct _unformat_input_t unformat_input_t
#define pg_edit_init_bitfield(e, type, field, field_offset, field_n_bits)
Definition: edit.h:98
pg_edit_t parity
Definition: pg.c:50
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
unformat_function_t * unformat_edit
Definition: pg.h:307
pg_edit_t type
Definition: pg.c:51
uword unformat_ethernet_address(unformat_input_t *input, va_list *args)
Definition: format.c:227
unsigned int u32
Definition: types.h:88
static void pg_srp_header_init(pg_srp_header_t *e)
Definition: pg.c:57
static void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:278
pg_edit_t ttl
Definition: pg.c:46
Definition: pg.h:96
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
u16 as_u16
Definition: packet.h:68
uword unformat_pg_number(unformat_input_t *input, va_list *args)
Definition: edit.c:85
static uword count_set_bits(uword x)
Definition: bitops.h:45
pg_edit_t priority
Definition: pg.c:49
Definition: pg.h:304
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169