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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>
25 #include <vnet/feature/feature.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_GPE_BYPASS, sw_interface_set_vxlan_gpe_bypass) \
49 _(VXLAN_GPE_ADD_DEL_TUNNEL, vxlan_gpe_add_del_tunnel) \
50 _(VXLAN_GPE_TUNNEL_DUMP, vxlan_gpe_tunnel_dump)
51 
52 static void
55 {
56  vl_api_sw_interface_set_vxlan_gpe_bypass_reply_t *rmp;
57  int rv = 0;
58  u32 sw_if_index = ntohl (mp->sw_if_index);
59 
61 
62  vnet_int_vxlan_gpe_bypass_mode (sw_if_index, mp->is_ipv6, mp->enable);
64 
65  REPLY_MACRO (VL_API_SW_INTERFACE_SET_VXLAN_GPE_BYPASS_REPLY);
66 }
67 
68 static void
71 {
73  int rv = 0;
75  u32 encap_fib_index, decap_fib_index;
76  u8 protocol;
77  uword *p;
78  ip4_main_t *im = &ip4_main;
79  u32 sw_if_index = ~0;
80 
81 
82  p = hash_get (im->fib_index_by_table_id, ntohl (mp->encap_vrf_id));
83  if (!p)
84  {
85  rv = VNET_API_ERROR_NO_SUCH_FIB;
86  goto out;
87  }
88  encap_fib_index = p[0];
89 
90  protocol = mp->protocol;
91 
92  /* Interpret decap_vrf_id as an opaque if sending to other-than-ip4-input */
93  if (protocol == VXLAN_GPE_INPUT_NEXT_IP4_INPUT)
94  {
95  p = hash_get (im->fib_index_by_table_id, ntohl (mp->decap_vrf_id));
96  if (!p)
97  {
98  rv = VNET_API_ERROR_NO_SUCH_INNER_FIB;
99  goto out;
100  }
101  decap_fib_index = p[0];
102  }
103  else
104  {
105  decap_fib_index = ntohl (mp->decap_vrf_id);
106  }
107 
108  /* Check src & dst are different */
109  if ((mp->is_ipv6 && memcmp (mp->local, mp->remote, 16) == 0) ||
110  (!mp->is_ipv6 && memcmp (mp->local, mp->remote, 4) == 0))
111  {
112  rv = VNET_API_ERROR_SAME_SRC_DST;
113  goto out;
114  }
115  memset (a, 0, sizeof (*a));
116 
117  a->is_add = mp->is_add;
118  a->is_ip6 = mp->is_ipv6;
119  /* ip addresses sent in network byte order */
120  if (a->is_ip6)
121  {
122  clib_memcpy (&(a->local.ip6), mp->local, 16);
123  clib_memcpy (&(a->remote.ip6), mp->remote, 16);
124  }
125  else
126  {
127  clib_memcpy (&(a->local.ip4), mp->local, 4);
128  clib_memcpy (&(a->remote.ip4), mp->remote, 4);
129  }
130  a->mcast_sw_if_index = ntohl (mp->mcast_sw_if_index);
131  a->encap_fib_index = encap_fib_index;
132  a->decap_fib_index = decap_fib_index;
133  a->protocol = protocol;
134  a->vni = ntohl (mp->vni);
135  rv = vnet_vxlan_gpe_add_del_tunnel (a, &sw_if_index);
136 
137 out:
138  /* *INDENT-OFF* */
139  REPLY_MACRO2(VL_API_VXLAN_GPE_ADD_DEL_TUNNEL_REPLY,
140  ({
141  rmp->sw_if_index = ntohl (sw_if_index);
142  }));
143  /* *INDENT-ON* */
144 }
145 
148 {
150  ip4_main_t *im4 = &ip4_main;
151  ip6_main_t *im6 = &ip6_main;
152  u8 is_ipv6 = !(t->flags & VXLAN_GPE_TUNNEL_IS_IPV4);
153 
154  rmp = vl_msg_api_alloc (sizeof (*rmp));
155  memset (rmp, 0, sizeof (*rmp));
156  rmp->_vl_msg_id = ntohs (VL_API_VXLAN_GPE_TUNNEL_DETAILS);
157  if (is_ipv6)
158  {
159  memcpy (rmp->local, &(t->local.ip6.as_u8), 16);
160  memcpy (rmp->remote, &(t->remote.ip6.as_u8), 16);
161  rmp->encap_vrf_id = htonl (im6->fibs[t->encap_fib_index].ft_table_id);
162  rmp->decap_vrf_id = htonl (im6->fibs[t->decap_fib_index].ft_table_id);
163  }
164  else
165  {
166  memcpy (rmp->local, &(t->local.ip4.as_u8), 4);
167  memcpy (rmp->remote, &(t->remote.ip4.as_u8), 4);
168  rmp->encap_vrf_id = htonl (im4->fibs[t->encap_fib_index].ft_table_id);
169  rmp->decap_vrf_id = htonl (im4->fibs[t->decap_fib_index].ft_table_id);
170  }
171  rmp->mcast_sw_if_index = htonl (t->mcast_sw_if_index);
172  rmp->vni = htonl (t->vni);
173  rmp->protocol = t->protocol;
174  rmp->sw_if_index = htonl (t->sw_if_index);
175  rmp->is_ipv6 = is_ipv6;
176  rmp->context = context;
177 
178  vl_msg_api_send_shmem (q, (u8 *) & rmp);
179 }
180 
183 {
187  u32 sw_if_index;
188 
190  if (q == 0)
191  {
192  return;
193  }
194 
195  sw_if_index = ntohl (mp->sw_if_index);
196 
197  if (~0 == sw_if_index)
198  {
199  /* *INDENT-OFF* */
200  pool_foreach (t, vgm->tunnels,
201  ({
202  send_vxlan_gpe_tunnel_details(t, q, mp->context);
203  }));
204  /* *INDENT-ON* */
205  }
206  else
207  {
208  if ((sw_if_index >= vec_len (vgm->tunnel_index_by_sw_if_index)) ||
209  (~0 == vgm->tunnel_index_by_sw_if_index[sw_if_index]))
210  {
211  return;
212  }
213  t = &vgm->tunnels[vgm->tunnel_index_by_sw_if_index[sw_if_index]];
215  }
216 }
217 
218 
219 /*
220  * vpe_api_hookup
221  * Add vpe's API message handlers to the table.
222  * vlib has alread mapped shared memory and
223  * added the client registration handlers.
224  * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
225  */
226 #define vl_msg_name_crc_list
227 #include <vnet/vnet_all_api_h.h>
228 #undef vl_msg_name_crc_list
229 
230 static void
232 {
233 #define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
234  foreach_vl_msg_name_crc_vxlan_gpe;
235 #undef _
236 }
237 
238 static clib_error_t *
240 {
241  api_main_t *am = &api_main;
242 
243 #define _(N,n) \
244  vl_msg_api_set_handlers(VL_API_##N, #n, \
245  vl_api_##n##_t_handler, \
246  vl_noop_handler, \
247  vl_api_##n##_t_endian, \
248  vl_api_##n##_t_print, \
249  sizeof(vl_api_##n##_t), 1);
251 #undef _
252 
253  am->api_trace_cfg[VL_API_VXLAN_GPE_ADD_DEL_TUNNEL].size +=
254  17 * sizeof (u32);
255 
256  /*
257  * Set up the (msg_name, crc, message-id) table
258  */
260 
261  return 0;
262 }
263 
265 
266 /*
267  * fd.io coding-style-patch-verification: ON
268  *
269  * Local Variables:
270  * eval: (c-set-style "gnu")
271  * End:
272  */
static void vl_api_sw_interface_set_vxlan_gpe_bypass_t_handler(vl_api_sw_interface_set_vxlan_gpe_bypass_t *mp)
Definition: vxlan_gpe_api.c:54
u32 flags
flags
Definition: vxlan_gpe.h:125
a
Definition: bitmap.h:516
#define REPLY_MACRO2(t, body)
u32 * tunnel_index_by_sw_if_index
Mapping from sw_if_index to tunnel index.
Definition: vxlan_gpe.h:201
VXLAN GPE definitions.
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:480
trace_cfg_t * api_trace_cfg
Definition: api_common.h:185
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:70
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:376
ip46_address_t local
tunnel local address
Definition: vxlan_gpe.h:104
void * vl_msg_api_alloc(int nbytes)
void vnet_int_vxlan_gpe_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: vxlan_gpe.c:1030
#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:109
Struct for VXLAN GPE tunnel.
Definition: vxlan_gpe.h:94
vxlan_gpe_main_t vxlan_gpe_main
Definition: vxlan_gpe.c:45
#define REPLY_MACRO(t)
u8 protocol
encapsulated protocol
Definition: vxlan_gpe.h:99
ip46_address_t remote
tunnel remote address
Definition: vxlan_gpe.h:106
u32 vni
VXLAN GPE VNI in HOST byte order, shifted left 8 bits.
Definition: vxlan_gpe.h:117
#define BAD_SW_IF_INDEX_LABEL
Struct for VXLAN GPE add/del args.
Definition: vxlan_gpe.h:221
api_main_t api_main
Definition: api_shared.c:35
u32 ft_table_id
Table ID (hash key) for this FIB.
Definition: fib_table.h:44
#define clib_memcpy(a, b, c)
Definition: string.h:69
unix_shared_memory_queue_t * vl_api_client_index_to_input_queue(u32 index)
static clib_error_t * vxlan_gpe_api_hookup(vlib_main_t *vm)
static void setup_message_id_table(api_main_t *am)
void vl_msg_api_send_shmem(unix_shared_memory_queue_t *q, u8 *elem)
unsigned int u32
Definition: types.h:88
Interface set vxlan-gpe-bypass request.
Definition: vxlan_gpe.api:66
ip6_main_t ip6_main
Definition: ip6_forward.c:2926
Struct for VXLAN GPE node state.
Definition: vxlan_gpe.h:182
IPv4 main type.
Definition: ip4.h:83
vxlan_gpe_tunnel_t * tunnels
vector of encap tunnel instances
Definition: vxlan_gpe.h:184
u64 uword
Definition: types.h:112
u32 decap_fib_index
FIB indices - inner IP packet lookup here.
Definition: vxlan_gpe.h:114
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:112
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1168
u32 sw_if_index
vnet intfc sw_if_index
Definition: vxlan_gpe.h:122
struct fib_table_t_ * fibs
Vector of FIBs.
Definition: ip4.h:88
#define VXLAN_GPE_TUNNEL_IS_IPV4
Flags for vxlan_gpe_tunnel_t.
Definition: vxlan_gpe.h:156
struct fib_table_t_ * fibs
Definition: ip6.h:151
#define foreach_vpe_api_msg
Definition: vxlan_gpe_api.c:47
#define VALIDATE_SW_IF_INDEX(mp)
struct _unix_shared_memory_queue unix_shared_memory_queue_t