FD.io VPP  v16.06
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  * ppp_pg.c: packet generator ppp 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/ppp/ppp.h>
43 
44 typedef struct {
49 
50 static inline void
52 {
53  pg_edit_init (&e->address, ppp_header_t, address);
54  pg_edit_init (&e->control, ppp_header_t, control);
55  pg_edit_init (&e->protocol, ppp_header_t, protocol);
56 }
57 
58 uword
59 unformat_pg_ppp_header (unformat_input_t * input, va_list * args)
60 {
61  pg_stream_t * s = va_arg (*args, pg_stream_t *);
62  pg_ppp_header_t * h;
63  u32 group_index, error;
64 
65  h = pg_create_edit_group (s, sizeof (h[0]), sizeof (ppp_header_t),
66  &group_index);
68 
69  pg_edit_set_fixed (&h->address, 0xff);
70  pg_edit_set_fixed (&h->control, 0x03);
71 
72  error = 1;
73  if (! unformat (input, "%U",
76  goto done;
77 
78  {
79  ppp_main_t * pm = &ppp_main;
80  ppp_protocol_info_t * pi = 0;
81  pg_node_t * pg_node = 0;
82 
83  if (h->protocol.type == PG_EDIT_FIXED)
84  {
85  u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO];
86  pi = ppp_get_protocol_info (pm, clib_net_to_host_u16 (t));
87  if (pi && pi->node_index != ~0)
88  pg_node = pg_get_node (pi->node_index);
89  }
90 
91  if (pg_node && pg_node->unformat_edit
92  && unformat_user (input, pg_node->unformat_edit, s))
93  ;
94 
95  else if (! unformat_user (input, unformat_pg_payload, s))
96  goto done;
97  }
98 
99  error = 0;
100  done:
101  if (error)
102  pg_free_edit_group (s);
103  return error == 0;
104 }
105 
Definition: edit.h:63
pg_edit_t address
Definition: pg.c:45
#define PG_EDIT_LO
Definition: edit.h:81
uword unformat(unformat_input_t *i, char *fmt,...)
Definition: unformat.c:942
always_inline pg_node_t * pg_get_node(uword node_index)
Definition: pg.h:335
static void pg_edit_set_fixed(pg_edit_t *e, u64 value)
Definition: edit.h:149
always_inline ppp_protocol_info_t * ppp_get_protocol_info(ppp_main_t *em, ppp_protocol_t protocol)
Definition: ppp.h:80
uword unformat_pg_edit(unformat_input_t *input, va_list *args)
Definition: edit.c:106
pg_edit_t control
Definition: pg.c:46
uword unformat_pg_payload(unformat_input_t *input, va_list *args)
Definition: edit.c:127
pg_edit_type_t type
Definition: edit.h:64
unformat_function_t unformat_ppp_protocol_net_byte_order
Definition: ppp.h:105
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:953
#define pg_edit_init(e, type, field)
Definition: edit.h:114
static void pg_ppp_header_init(pg_ppp_header_t *e)
Definition: pg.c:51
u8 * values[2]
Definition: edit.h:80
ppp_main_t ppp_main
Definition: ppp.c:44
always_inline void * pg_create_edit_group(pg_stream_t *s, int n_edit_bytes, int n_packet_bytes, u32 *group_index)
Definition: pg.h:214
u32 node_index
Definition: ppp.h:64
unformat_function_t * unformat_edit
Definition: pg.h:290
Definition: ppp.h:70
unsigned int u32
Definition: types.h:88
Definition: pg.h:91
u64 uword
Definition: types.h:112
unsigned short u16
Definition: types.h:57
pg_edit_t protocol
Definition: pg.c:47
struct _unformat_input_t unformat_input_t
always_inline void pg_free_edit_group(pg_stream_t *s)
Definition: pg.h:269
Definition: pg.h:288
uword unformat_pg_ppp_header(unformat_input_t *input, va_list *args)
Definition: pg.c:59