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Vector Packet Processing
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interface.c
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1 /*
2  * interface.c: mpls interfaces
3  *
4  * Copyright (c) 2012 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #include <vnet/vnet.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/mpls/mpls.h>
21 #include <vnet/fib/mpls_fib.h>
22 #include <vnet/fib/ip4_fib.h>
23 #include <vnet/adj/adj_midchain.h>
24 #include <vnet/dpo/classify_dpo.h>
25 
26 
27 u8
29 {
30  mpls_main_t * mm = &mpls_main;
31 
32  if (vec_len(mm->mpls_enabled_by_sw_if_index) < sw_if_index)
33  return (0);
34 
35  return (mm->mpls_enabled_by_sw_if_index[sw_if_index]);
36 }
37 
38 void
40  u32 sw_if_index,
41  u8 is_enable)
42 {
43  fib_node_index_t lfib_index;
44 
46 
47  /*
48  * enable/disable only on the 1<->0 transition
49  */
50  if (is_enable)
51  {
52  if (1 != ++mm->mpls_enabled_by_sw_if_index[sw_if_index])
53  return;
54 
58  mm->fib_index_by_sw_if_index[sw_if_index] = lfib_index;
59  }
60  else
61  {
62  ASSERT(mm->mpls_enabled_by_sw_if_index[sw_if_index] > 0);
63  if (0 != --mm->mpls_enabled_by_sw_if_index[sw_if_index])
64  return;
65 
68  }
69 
70  vnet_feature_enable_disable ("mpls-input", "mpls-not-enabled",
71  sw_if_index, !is_enable, 0, 0);
72 
73 }
74 
75 static clib_error_t *
77  unformat_input_t * input,
78  vlib_cli_command_t * cmd)
79 {
80  vnet_main_t * vnm = vnet_get_main();
81  clib_error_t * error = 0;
82  u32 sw_if_index, enable;
83 
84  sw_if_index = ~0;
85 
86  if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
87  {
88  error = clib_error_return (0, "unknown interface `%U'",
89  format_unformat_error, input);
90  goto done;
91  }
92 
93  if (unformat (input, "enable"))
94  enable = 1;
95  else if (unformat (input, "disable"))
96  enable = 0;
97  else
98  {
99  error = clib_error_return (0, "expected 'enable' or 'disable'",
100  format_unformat_error, input);
101  goto done;
102  }
103 
104  mpls_sw_interface_enable_disable(&mpls_main, sw_if_index, enable);
105 
106  done:
107  return error;
108 }
109 
110 /*?
111  * This command enables an interface to accpet MPLS packets
112  *
113  * @cliexpar
114  * @cliexstart{set interface mpls}
115  * set interface mpls GigEthernet0/8/0 enable
116  * @cliexend
117  ?*/
118 VLIB_CLI_COMMAND (set_interface_ip_table_command, static) = {
119  .path = "set interface mpls",
120  .function = mpls_interface_enable_disable,
121  .short_help = "Enable/Disable an interface for MPLS forwarding",
122 };
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:436
void mpls_sw_interface_enable_disable(mpls_main_t *mm, u32 sw_if_index, u8 is_enable)
Definition: interface.c:39
static clib_error_t * mpls_interface_enable_disable(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:76
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
u32 * fib_index_by_sw_if_index
Definition: mpls.h:42
u8 mpls_sw_interface_is_enabled(u32 sw_if_index)
Definition: interface.c:28
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:983
unformat_function_t unformat_vnet_sw_interface
u8 * mpls_enabled_by_sw_if_index
Definition: mpls.h:58
#define clib_error_return(e, args...)
Definition: error.h:99
void fib_table_unlock(u32 fib_index, fib_protocol_t proto)
Take a reference counting lock on the table.
Definition: fib_table.c:1145
struct _unformat_input_t unformat_input_t
#define MPLS_FIB_DEFAULT_TABLE_ID
Definition: mpls_fib.h:28
mpls_main_t mpls_main
Definition: mpls.c:25
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:28
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
u32 fib_table_find_or_create_and_lock(fib_protocol_t proto, u32 table_id)
Get the index of the FIB for a Table-ID.
Definition: fib_table.c:1041
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:485
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
int vnet_feature_enable_disable(const char *arc_name, const char *node_name, u32 sw_if_index, int enable_disable, void *feature_config, u32 n_feature_config_bytes)
Definition: feature.c:225