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
44typedef struct
45{
46  pg_edit_t address;
47  pg_edit_t control;
48  pg_edit_t protocol;
49} pg_ppp_header_t;
50
51static inline void
52pg_ppp_header_init (pg_ppp_header_t * e)
53{
54  pg_edit_init (&e->address, ppp_header_t, address);
55  pg_edit_init (&e->control, ppp_header_t, control);
56  pg_edit_init (&e->protocol, ppp_header_t, protocol);
57}
58
59uword
60unformat_pg_ppp_header (unformat_input_t * input, va_list * args)
61{
62  pg_stream_t *s = va_arg (*args, pg_stream_t *);
63  pg_ppp_header_t *h;
64  u32 group_index, error;
65
66  h = pg_create_edit_group (s, sizeof (h[0]), sizeof (ppp_header_t),
67			    &group_index);
68  pg_ppp_header_init (h);
69
70  pg_edit_set_fixed (&h->address, 0xff);
71  pg_edit_set_fixed (&h->control, 0x03);
72
73  error = 1;
74  if (!unformat (input, "%U",
75		 unformat_pg_edit,
76		 unformat_ppp_protocol_net_byte_order, &h->protocol))
77    goto done;
78
79  {
80    ppp_main_t *pm = &ppp_main;
81    ppp_protocol_info_t *pi = 0;
82    pg_node_t *pg_node = 0;
83
84    if (h->protocol.type == PG_EDIT_FIXED)
85      {
86	u16 t = *(u16 *) h->protocol.values[PG_EDIT_LO];
87	pi = ppp_get_protocol_info (pm, clib_net_to_host_u16 (t));
88	if (pi && pi->node_index != ~0)
89	  pg_node = pg_get_node (pi->node_index);
90      }
91
92    if (pg_node && pg_node->unformat_edit
93	&& unformat_user (input, pg_node->unformat_edit, s))
94      ;
95
96    else if (!unformat_user (input, unformat_pg_payload, s))
97      goto done;
98  }
99
100  error = 0;
101done:
102  if (error)
103    pg_free_edit_group (s);
104  return error == 0;
105}
106
107
108/*
109 * fd.io coding-style-patch-verification: ON
110 *
111 * Local Variables:
112 * eval: (c-set-style "gnu")
113 * End:
114 */
115