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Vector Packet Processing
vxlan_api.c
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1 /*
2  *------------------------------------------------------------------
3  * vxlan_api.c - vxlan api
4  *
5  * Copyright (c) 2016 Cisco and/or its affiliates.
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at:
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  *------------------------------------------------------------------
18  */
19 
20 #include <vnet/vnet.h>
21 #include <vlibmemory/api.h>
22 
23 #include <vnet/interface.h>
24 #include <vnet/api_errno.h>
25 #include <vnet/feature/feature.h>
26 #include <vnet/vxlan/vxlan.h>
27 #include <vnet/fib/fib_table.h>
28 
29 #include <vnet/vnet_msg_enum.h>
30 
31 #define vl_typedefs /* define message structures */
32 #include <vnet/vnet_all_api_h.h>
33 #undef vl_typedefs
34 
35 #define vl_endianfun /* define message structures */
36 #include <vnet/vnet_all_api_h.h>
37 #undef vl_endianfun
38 
39 /* instantiate all the print functions we know about */
40 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
41 #define vl_printfun
42 #include <vnet/vnet_all_api_h.h>
43 #undef vl_printfun
44 
46 
47 #define foreach_vpe_api_msg \
48 _(SW_INTERFACE_SET_VXLAN_BYPASS, sw_interface_set_vxlan_bypass) \
49 _(VXLAN_ADD_DEL_TUNNEL, vxlan_add_del_tunnel) \
50 _(VXLAN_TUNNEL_DUMP, vxlan_tunnel_dump)
51 
52 static void
55 {
57  int rv = 0;
58  u32 sw_if_index = ntohl (mp->sw_if_index);
59 
61 
62  vnet_int_vxlan_bypass_mode (sw_if_index, mp->is_ipv6, mp->enable);
64 
65  REPLY_MACRO (VL_API_SW_INTERFACE_SET_VXLAN_BYPASS_REPLY);
66 }
67 
70 {
72  int rv = 0;
73  ip4_main_t *im = &ip4_main;
74 
75  uword *p = hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id));
76  if (!p)
77  {
78  rv = VNET_API_ERROR_NO_SUCH_FIB;
79  goto out;
80  }
81 
83  .is_add = mp->is_add,
84  .is_ip6 = mp->is_ipv6,
85  .mcast_sw_if_index = ntohl (mp->mcast_sw_if_index),
86  .encap_fib_index = p[0],
87  .decap_next_index = ntohl (mp->decap_next_index),
88  .vni = ntohl (mp->vni),
89  .dst = to_ip46 (mp->is_ipv6, mp->dst_address),
90  .src = to_ip46 (mp->is_ipv6, mp->src_address),
91  };
92 
93  /* Check src & dst are different */
94  if (ip46_address_cmp (&a.dst, &a.src) == 0)
95  {
96  rv = VNET_API_ERROR_SAME_SRC_DST;
97  goto out;
98  }
99  if (ip46_address_is_multicast (&a.dst) &&
101  {
102  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
103  goto out;
104  }
105 
106  u32 sw_if_index = ~0;
107  rv = vnet_vxlan_add_del_tunnel (&a, &sw_if_index);
108 
109 out:
110  /* *INDENT-OFF* */
111  REPLY_MACRO2(VL_API_VXLAN_ADD_DEL_TUNNEL_REPLY,
112  ({
113  rmp->sw_if_index = ntohl (sw_if_index);
114  }));
115  /* *INDENT-ON* */
116 }
117 
118 static void send_vxlan_tunnel_details
120 {
122  ip4_main_t *im4 = &ip4_main;
123  ip6_main_t *im6 = &ip6_main;
124  u8 is_ipv6 = !ip46_address_is_ip4 (&t->dst);
125 
126  rmp = vl_msg_api_alloc (sizeof (*rmp));
127  memset (rmp, 0, sizeof (*rmp));
128  rmp->_vl_msg_id = ntohs (VL_API_VXLAN_TUNNEL_DETAILS);
129  if (is_ipv6)
130  {
131  memcpy (rmp->src_address, t->src.ip6.as_u8, 16);
132  memcpy (rmp->dst_address, t->dst.ip6.as_u8, 16);
133  rmp->encap_vrf_id = htonl (im6->fibs[t->encap_fib_index].ft_table_id);
134  }
135  else
136  {
137  memcpy (rmp->src_address, t->src.ip4.as_u8, 4);
138  memcpy (rmp->dst_address, t->dst.ip4.as_u8, 4);
139  rmp->encap_vrf_id = htonl (im4->fibs[t->encap_fib_index].ft_table_id);
140  }
141  rmp->mcast_sw_if_index = htonl (t->mcast_sw_if_index);
142  rmp->vni = htonl (t->vni);
143  rmp->decap_next_index = htonl (t->decap_next_index);
144  rmp->sw_if_index = htonl (t->sw_if_index);
145  rmp->is_ipv6 = is_ipv6;
146  rmp->context = context;
147 
148  vl_msg_api_send_shmem (q, (u8 *) & rmp);
149 }
150 
153 {
155  vxlan_main_t *vxm = &vxlan_main;
156  vxlan_tunnel_t *t;
157  u32 sw_if_index;
158 
160  if (q == 0)
161  {
162  return;
163  }
164 
165  sw_if_index = ntohl (mp->sw_if_index);
166 
167  if (~0 == sw_if_index)
168  {
169  /* *INDENT-OFF* */
170  pool_foreach (t, vxm->tunnels,
171  ({
172  send_vxlan_tunnel_details(t, q, mp->context);
173  }));
174  /* *INDENT-ON* */
175  }
176  else
177  {
178  if ((sw_if_index >= vec_len (vxm->tunnel_index_by_sw_if_index)) ||
179  (~0 == vxm->tunnel_index_by_sw_if_index[sw_if_index]))
180  {
181  return;
182  }
183  t = &vxm->tunnels[vxm->tunnel_index_by_sw_if_index[sw_if_index]];
185  }
186 }
187 
188 /*
189  * vpe_api_hookup
190  * Add vpe's API message handlers to the table.
191  * vlib has alread mapped shared memory and
192  * added the client registration handlers.
193  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
194  */
195 #define vl_msg_name_crc_list
196 #include <vnet/vnet_all_api_h.h>
197 #undef vl_msg_name_crc_list
198 
199 static void
201 {
202 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
203  foreach_vl_msg_name_crc_vxlan;
204 #undef _
205 }
206 
207 static clib_error_t *
209 {
210  api_main_t *am = &api_main;
211 
212 #define _(N,n) \
213  vl_msg_api_set_handlers(VL_API_##N, #n, \
214  vl_api_##n##_t_handler, \
215  vl_noop_handler, \
216  vl_api_##n##_t_endian, \
217  vl_api_##n##_t_print, \
218  sizeof(vl_api_##n##_t), 1);
220 #undef _
221 
222  am->api_trace_cfg[VL_API_VXLAN_ADD_DEL_TUNNEL].size += 16 * sizeof (u32);
223 
224  /*
225  * Set up the (msg_name, crc, message-id) table
226  */
228 
229  return 0;
230 }
231 
233 
234 /*
235  * fd.io coding-style-patch-verification: ON
236  *
237  * Local Variables:
238  * eval: (c-set-style "gnu")
239  * End:
240  */
static void vl_api_sw_interface_set_vxlan_bypass_t_handler(vl_api_sw_interface_set_vxlan_bypass_t *mp)
Definition: vxlan_api.c:54
a
Definition: bitmap.h:516
static uword ip46_address_is_multicast(ip46_address_t *a)
Definition: ip6_packet.h:151
void vl_msg_api_send_shmem(unix_shared_memory_queue_t *q, u8 *elem)
int size
Definition: api.h:71
#define REPLY_MACRO2(t, body)
Interface set vxlan-bypass request.
Definition: vxlan.api:64
ip46_address_t dst
Definition: vxlan.h:80
#define foreach_vpe_api_msg
Definition: vxlan_api.c:47
unix_shared_memory_queue_t * vl_api_client_index_to_input_queue(u32 index)
static void setup_message_id_table(api_main_t *am)
Definition: vxlan_api.c:200
#define ip46_address_cmp(ip46_1, ip46_2)
Definition: ip6_packet.h:80
trace_cfg_t * api_trace_cfg
Definition: api.h:140
api_main_t api_main
Definition: api_shared.c:35
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:376
VLIB_API_INIT_FUNCTION(vxlan_api_hookup)
static void vl_api_vxlan_add_del_tunnel_t_handler(vl_api_vxlan_add_del_tunnel_t *mp)
Definition: vxlan_api.c:69
static clib_error_t * vxlan_api_hookup(vlib_main_t *vm)
Definition: vxlan_api.c:208
#define hash_get(h, key)
Definition: hash.h:248
uword * fib_index_by_table_id
Hash table mapping table id to fib index.
Definition: ip4.h:130
vxlan_main_t vxlan_main
Definition: vxlan.c:41
#define REPLY_MACRO(t)
#define ip46_address_is_ip4(ip46)
Definition: ip6_packet.h:76
#define BAD_SW_IF_INDEX_LABEL
int vnet_vxlan_add_del_tunnel(vnet_vxlan_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: vxlan.c:363
static uword vnet_sw_if_index_is_api_valid(u32 sw_if_index)
void * vl_msg_api_alloc(int nbytes)
u32 ft_table_id
Table ID (hash key) for this FIB.
Definition: fib_table.h:56
vlib_main_t * vm
Definition: buffer.c:276
u32 mcast_sw_if_index
Definition: vxlan.h:83
u32 decap_next_index
Definition: vxlan.h:86
static ip46_address_t to_ip46(u32 is_ipv6, u8 *buf)
Definition: ip6_packet.h:86
unsigned int u32
Definition: types.h:88
ip6_main_t ip6_main
Definition: ip6_forward.c:2846
IPv4 main type.
Definition: ip4.h:107
u32 sw_if_index
Definition: vxlan.h:92
u64 uword
Definition: types.h:112
void vnet_int_vxlan_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: vxlan.c:911
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
u32 encap_fib_index
Definition: vxlan.h:89
u32 * tunnel_index_by_sw_if_index
Definition: vxlan.h:154
static void vl_api_vxlan_tunnel_dump_t_handler(vl_api_vxlan_tunnel_dump_t *mp)
Definition: vxlan_api.c:152
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1117
struct fib_table_t_ * fibs
Vector of FIBs.
Definition: ip4.h:112
Interface set vxlan-bypass response.
Definition: vxlan.api:77
struct fib_table_t_ * fibs
Definition: ip6.h:154
static void send_vxlan_tunnel_details(vxlan_tunnel_t *t, unix_shared_memory_queue_t *q, u32 context)
Definition: vxlan_api.c:119
vxlan_tunnel_t * tunnels
Definition: vxlan.h:136
ip46_address_t src
Definition: vxlan.h:79
#define VALIDATE_SW_IF_INDEX(mp)
struct _unix_shared_memory_queue unix_shared_memory_queue_t