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Vector Packet Processing
vxlan_gpe_api.c
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1 /*
2  *------------------------------------------------------------------
3  * vxlan_gpe_api.c - vxlan_gpe 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>
26 #include <vnet/fib/fib_table.h>
27 
28 #include <vnet/vnet_msg_enum.h>
29 
30 #define vl_typedefs /* define message structures */
31 #include <vnet/vnet_all_api_h.h>
32 #undef vl_typedefs
33 
34 #define vl_endianfun /* define message structures */
35 #include <vnet/vnet_all_api_h.h>
36 #undef vl_endianfun
37 
38 /* instantiate all the print functions we know about */
39 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
40 #define vl_printfun
41 #include <vnet/vnet_all_api_h.h>
42 #undef vl_printfun
43 
45 
46 #define foreach_vpe_api_msg \
47 _(VXLAN_GPE_ADD_DEL_TUNNEL, vxlan_gpe_add_del_tunnel) \
48 _(VXLAN_GPE_TUNNEL_DUMP, vxlan_gpe_tunnel_dump) \
49 
50 static void
53 {
55  int rv = 0;
57  u32 encap_fib_index, decap_fib_index;
58  u8 protocol;
59  uword *p;
60  ip4_main_t *im = &ip4_main;
61  u32 sw_if_index = ~0;
62 
63 
64  p = hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id));
65  if (!p)
66  {
67  rv = VNET_API_ERROR_NO_SUCH_FIB;
68  goto out;
69  }
70  encap_fib_index = p[0];
71 
72  protocol = mp->protocol;
73 
74  /* Interpret decap_vrf_id as an opaque if sending to other-than-ip4-input */
75  if (protocol == VXLAN_GPE_INPUT_NEXT_IP4_INPUT)
76  {
77  p = hash_get (im->fib_index_by_table_id, ntohl (mp->decap_vrf_id));
78  if (!p)
79  {
80  rv = VNET_API_ERROR_NO_SUCH_INNER_FIB;
81  goto out;
82  }
83  decap_fib_index = p[0];
84  }
85  else
86  {
87  decap_fib_index = ntohl (mp->decap_vrf_id);
88  }
89 
90  /* Check src & dst are different */
91  if ((mp->is_ipv6 && memcmp (mp->local, mp->remote, 16) == 0) ||
92  (!mp->is_ipv6 && memcmp (mp->local, mp->remote, 4) == 0))
93  {
94  rv = VNET_API_ERROR_SAME_SRC_DST;
95  goto out;
96  }
97  memset (a, 0, sizeof (*a));
98 
99  a->is_add = mp->is_add;
100  a->is_ip6 = mp->is_ipv6;
101  /* ip addresses sent in network byte order */
102  if (a->is_ip6)
103  {
104  clib_memcpy (&(a->local.ip6), mp->local, 16);
105  clib_memcpy (&(a->remote.ip6), mp->remote, 16);
106  }
107  else
108  {
109  clib_memcpy (&(a->local.ip4), mp->local, 4);
110  clib_memcpy (&(a->remote.ip4), mp->remote, 4);
111  }
112  a->encap_fib_index = encap_fib_index;
113  a->decap_fib_index = decap_fib_index;
114  a->protocol = protocol;
115  a->vni = ntohl (mp->vni);
116  rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index);
117 
118 out:
119  /* *INDENT-OFF* */
120  REPLY_MACRO2(VL_API_VXLAN_GPE_ADD_DEL_TUNNEL_REPLY,
121  ({
122  rmp->sw_if_index = ntohl (sw_if_index);
123  }));
124  /* *INDENT-ON* */
125 }
126 
129 {
131  ip4_main_t *im4 = &ip4_main;
132  ip6_main_t *im6 = &ip6_main;
133  u8 is_ipv6 = !(t->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
134 
135  rmp = vl_msg_api_alloc (sizeof (*rmp));
136  memset (rmp, 0, sizeof (*rmp));
137  rmp->_vl_msg_id = ntohs (VL_API_VXLAN_GPE_TUNNEL_DETAILS);
138  if (is_ipv6)
139  {
140  memcpy (rmp->local, &(t->local.ip6), 16);
141  memcpy (rmp->remote, &(t->remote.ip6), 16);
142  rmp->encap_vrf_id = htonl (im6->fibs[t->encap_fib_index].ft_table_id);
143  rmp->decap_vrf_id = htonl (im6->fibs[t->decap_fib_index].ft_table_id);
144  }
145  else
146  {
147  memcpy (rmp->local, &(t->local.ip4), 4);
148  memcpy (rmp->remote, &(t->remote.ip4), 4);
149  rmp->encap_vrf_id = htonl (im4->fibs[t->encap_fib_index].ft_table_id);
150  rmp->decap_vrf_id = htonl (im4->fibs[t->decap_fib_index].ft_table_id);
151  }
152  rmp->vni = htonl (t->vni);
153  rmp->protocol = t->protocol;
154  rmp->sw_if_index = htonl (t->sw_if_index);
155  rmp->is_ipv6 = is_ipv6;
156  rmp->context = context;
157 
158  vl_msg_api_send_shmem (q, (u8 *) & rmp);
159 }
160 
163 {
167  u32 sw_if_index;
168 
170  if (q == 0)
171  {
172  return;
173  }
174 
175  sw_if_index = ntohl (mp->sw_if_index);
176 
177  if (~0 == sw_if_index)
178  {
179  /* *INDENT-OFF* */
180  pool_foreach (t, vgm->tunnels,
181  ({
182  send_vxlan_gpe_tunnel_details(t, q, mp->context);
183  }));
184  /* *INDENT-ON* */
185  }
186  else
187  {
188  if ((sw_if_index >= vec_len (vgm->tunnel_index_by_sw_if_index)) ||
189  (~0 == vgm->tunnel_index_by_sw_if_index[sw_if_index]))
190  {
191  return;
192  }
193  t = &vgm->tunnels[vgm->tunnel_index_by_sw_if_index[sw_if_index]];
195  }
196 }
197 
198 
199 /*
200  * vpe_api_hookup
201  * Add vpe's API message handlers to the table.
202  * vlib has alread mapped shared memory and
203  * added the client registration handlers.
204  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
205  */
206 #define vl_msg_name_crc_list
207 #include <vnet/vnet_all_api_h.h>
208 #undef vl_msg_name_crc_list
209 
210 static void
212 {
213 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
214  foreach_vl_msg_name_crc_vxlan_gpe;
215 #undef _
216 }
217 
218 static clib_error_t *
220 {
221  api_main_t *am = &api_main;
222 
223 #define _(N,n) \
224  vl_msg_api_set_handlers(VL_API_##N, #n, \
225  vl_api_##n##_t_handler, \
226  vl_noop_handler, \
227  vl_api_##n##_t_endian, \
228  vl_api_##n##_t_print, \
229  sizeof(vl_api_##n##_t), 1);
231 #undef _
232 
233  /*
234  * Set up the (msg_name, crc, message-id) table
235  */
237 
238  return 0;
239 }
240 
242 
243 /*
244  * fd.io coding-style-patch-verification: ON
245  *
246  * Local Variables:
247  * eval: (c-set-style "gnu")
248  * End:
249  */
u32 flags
flags
Definition: vxlan_gpe.h:116
a
Definition: bitmap.h:516
void vl_msg_api_send_shmem(unix_shared_memory_queue_t *q, u8 *elem)
#define REPLY_MACRO2(t, body)
u32 * tunnel_index_by_sw_if_index
Mapping from sw_if_index to tunnel index.
Definition: vxlan_gpe.h:165
VXLAN GPE definitions.
unix_shared_memory_queue_t * vl_api_client_index_to_input_queue(u32 index)
int vnet_vxlan_gpe_add_del_tunnel(vnet_vxlan_gpe_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Add or Del a VXLAN GPE tunnel.
Definition: vxlan_gpe.c:292
api_main_t api_main
Definition: api_shared.c:35
static void vl_api_vxlan_gpe_add_del_tunnel_t_handler(vl_api_vxlan_gpe_add_del_tunnel_t *mp)
Definition: vxlan_gpe_api.c:52
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:376
ip46_address_t local
tunnel local address
Definition: vxlan_gpe.h:98
#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
Struct for VXLAN GPE tunnel.
Definition: vxlan_gpe.h:90
vxlan_gpe_main_t vxlan_gpe_main
Definition: vxlan_gpe.c:24
u8 protocol
encapsulated protocol
Definition: vxlan_gpe.h:95
ip46_address_t remote
tunnel remote address
Definition: vxlan_gpe.h:100
u32 vni
VXLAN GPE VNI in HOST byte order, shifted left 8 bits.
Definition: vxlan_gpe.h:108
Struct for VXLAN GPE add/del args.
Definition: vxlan_gpe.h:185
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
#define clib_memcpy(a, b, c)
Definition: string.h:69
static clib_error_t * vxlan_gpe_api_hookup(vlib_main_t *vm)
static void setup_message_id_table(api_main_t *am)
unsigned int u32
Definition: types.h:88
ip6_main_t ip6_main
Definition: ip6_forward.c:2846
Struct for VXLAN GPE node state.
Definition: vxlan_gpe.h:152
IPv4 main type.
Definition: ip4.h:107
vxlan_gpe_tunnel_t * tunnels
vector of encap tunnel instances
Definition: vxlan_gpe.h:154
u64 uword
Definition: types.h:112
u32 decap_fib_index
FIB indices - inner IP packet lookup here.
Definition: vxlan_gpe.h:105
VLIB_API_INIT_FUNCTION(vxlan_gpe_api_hookup)
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
static void vl_api_vxlan_gpe_tunnel_dump_t_handler(vl_api_vxlan_gpe_tunnel_dump_t *mp)
static void send_vxlan_gpe_tunnel_details(vxlan_gpe_tunnel_t *t, unix_shared_memory_queue_t *q, u32 context)
u32 encap_fib_index
FIB indices - tunnel partner lookup here.
Definition: vxlan_gpe.h:103
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1117
u32 sw_if_index
vnet intfc sw_if_index
Definition: vxlan_gpe.h:113
struct fib_table_t_ * fibs
Vector of FIBs.
Definition: ip4.h:112
#define VXLAN_GPE_TUNNEL_IS_IPV4
Flags for vxlan_gpe_tunnel_t.
Definition: vxlan_gpe.h:126
struct fib_table_t_ * fibs
Definition: ip6.h:154
#define foreach_vpe_api_msg
Definition: vxlan_gpe_api.c:46
struct _unix_shared_memory_queue unix_shared_memory_queue_t