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Vector Packet Processing
api_helper_macros.h
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1 /*
2  *------------------------------------------------------------------
3  * api_helper_macros.h - message handler helper macros
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 #ifndef __api_helper_macros_h__
21 #define __api_helper_macros_h__
22 
23 #define f64_endian(a)
24 #define f64_print(a,b)
25 
26 #ifndef REPLY_MSG_ID_BASE
27 #define REPLY_MSG_ID_BASE 0
28 #endif
29 
30 #define REPLY_MACRO(t) \
31 do { \
32  vl_api_registration_t *rp; \
33  rv = vl_msg_api_pd_handler (mp, rv); \
34  rp = vl_api_client_index_to_registration (mp->client_index); \
35  if (rp == 0) \
36  return; \
37  \
38  rmp = vl_msg_api_alloc (sizeof (*rmp)); \
39  rmp->_vl_msg_id = htons((t)+(REPLY_MSG_ID_BASE)); \
40  rmp->context = mp->context; \
41  rmp->retval = ntohl(rv); \
42  \
43  vl_api_send_msg (rp, (u8 *)rmp); \
44 } while(0);
45 
46 #define REPLY_MACRO2(t, body) \
47 do { \
48  vl_api_registration_t *rp; \
49  rv = vl_msg_api_pd_handler (mp, rv); \
50  rp = vl_api_client_index_to_registration (mp->client_index); \
51  if (rp == 0) \
52  return; \
53  \
54  rmp = vl_msg_api_alloc (sizeof (*rmp)); \
55  rmp->_vl_msg_id = htons((t)+(REPLY_MSG_ID_BASE)); \
56  rmp->context = mp->context; \
57  rmp->retval = ntohl(rv); \
58  do {body;} while (0); \
59  vl_api_send_msg (rp, (u8 *)rmp); \
60 } while(0);
61 
62 #define REPLY_MACRO3(t, n, body) \
63 do { \
64  vl_api_registration_t *rp; \
65  rv = vl_msg_api_pd_handler (mp, rv); \
66  rp = vl_api_client_index_to_registration (mp->client_index); \
67  if (rp == 0) \
68  return; \
69  \
70  rmp = vl_msg_api_alloc (sizeof (*rmp) + n); \
71  rmp->_vl_msg_id = htons((t)+(REPLY_MSG_ID_BASE)); \
72  rmp->context = mp->context; \
73  rmp->retval = ntohl(rv); \
74  do {body;} while (0); \
75  vl_api_send_msg (rp, (u8 *)rmp); \
76 } while(0);
77 
78 #define REPLY_MACRO4(t, n, body) \
79 do { \
80  vl_api_registration_t *rp; \
81  u8 is_error = 0; \
82  rv = vl_msg_api_pd_handler (mp, rv); \
83  \
84  rp = vl_api_client_index_to_registration (mp->client_index); \
85  if (rp == 0) \
86  return; \
87  \
88  rmp = vl_msg_api_alloc_or_null (sizeof (*rmp) + n); \
89  if (!rmp) \
90  { \
91  /* if there isn't enough memory, try to allocate */ \
92  /* some at least for returning an error */ \
93  rmp = vl_msg_api_alloc (sizeof (*rmp)); \
94  if (!rmp) \
95  return; \
96  \
97  memset (rmp, 0, sizeof (*rmp)); \
98  rv = VNET_API_ERROR_TABLE_TOO_BIG; \
99  is_error = 1; \
100  } \
101  rmp->_vl_msg_id = htons((t)+(REPLY_MSG_ID_BASE)); \
102  rmp->context = mp->context; \
103  rmp->retval = ntohl(rv); \
104  if (!is_error) \
105  do {body;} while (0); \
106  vl_api_send_msg (rp, (u8 *)rmp); \
107 } while(0);
108 
109 /* "trust, but verify" */
110 
111 static inline uword
112 vnet_sw_if_index_is_api_valid (u32 sw_if_index)
113 {
114  return vnet_sw_interface_is_api_valid (vnet_get_main (), sw_if_index);
115 }
116 
117 #define VALIDATE_SW_IF_INDEX(mp) \
118  do { u32 __sw_if_index = ntohl(mp->sw_if_index); \
119  if (!vnet_sw_if_index_is_api_valid(__sw_if_index)) { \
120  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
121  goto bad_sw_if_index; \
122  } \
123 } while(0);
124 
125 #define BAD_SW_IF_INDEX_LABEL \
126 do { \
127 bad_sw_if_index: \
128  ; \
129 } while (0);
130 
131 #define VALIDATE_RX_SW_IF_INDEX(mp) \
132  do { u32 __rx_sw_if_index = ntohl(mp->rx_sw_if_index); \
133  if (!vnet_sw_if_index_is_api_valid(__rx_sw_if_index)) { \
134  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
135  goto bad_rx_sw_if_index; \
136  } \
137 } while(0);
138 
139 #define BAD_RX_SW_IF_INDEX_LABEL \
140 do { \
141 bad_rx_sw_if_index: \
142  ; \
143 } while (0);
144 
145 #define VALIDATE_TX_SW_IF_INDEX(mp) \
146  do { u32 __tx_sw_if_index = ntohl(mp->tx_sw_if_index); \
147  if (!vnet_sw_if_index_is_api_valid(__tx_sw_if_index)) { \
148  rv = VNET_API_ERROR_INVALID_SW_IF_INDEX; \
149  goto bad_tx_sw_if_index; \
150  } \
151 } while(0);
152 
153 #define BAD_TX_SW_IF_INDEX_LABEL \
154 do { \
155 bad_tx_sw_if_index: \
156  ; \
157 } while (0);
158 
159 #define VALIDATE_BD_ID(mp) \
160  do { u32 __rx_bd_id = ntohl(mp->bd_id); \
161  if (__rx_bd_id > L2_BD_ID_MAX) { \
162  rv = VNET_API_ERROR_BD_ID_EXCEED_MAX; \
163  goto bad_bd_id; \
164  } \
165 } while(0);
166 
167 #define BAD_BD_ID_LABEL \
168 do { \
169 bad_bd_id: \
170  ; \
171 } while (0);
172 
173 #define pub_sub_handler(lca,UCA) \
174 static void vl_api_want_##lca##_t_handler ( \
175  vl_api_want_##lca##_t *mp) \
176 { \
177  vpe_api_main_t *vam = &vpe_api_main; \
178  vpe_client_registration_t *rp; \
179  vl_api_want_##lca##_reply_t *rmp; \
180  uword *p; \
181  i32 rv = 0; \
182  \
183  p = hash_get (vam->lca##_registration_hash, mp->client_index); \
184  if (p) { \
185  if (mp->enable_disable) { \
186  clib_warning ("pid %d: already enabled...", mp->pid); \
187  rv = VNET_API_ERROR_INVALID_REGISTRATION; \
188  goto reply; \
189  } else { \
190  rp = pool_elt_at_index (vam->lca##_registrations, p[0]); \
191  pool_put (vam->lca##_registrations, rp); \
192  hash_unset (vam->lca##_registration_hash, \
193  mp->client_index); \
194  goto reply; \
195  } \
196  } \
197  if (mp->enable_disable == 0) { \
198  clib_warning ("pid %d: already disabled...", mp->pid); \
199  rv = VNET_API_ERROR_INVALID_REGISTRATION; \
200  goto reply; \
201  } \
202  pool_get (vam->lca##_registrations, rp); \
203  rp->client_index = mp->client_index; \
204  rp->client_pid = mp->pid; \
205  hash_set (vam->lca##_registration_hash, rp->client_index, \
206  rp - vam->lca##_registrations); \
207  \
208 reply: \
209  REPLY_MACRO (VL_API_WANT_##UCA##_REPLY); \
210 } \
211  \
212 static clib_error_t * vl_api_want_##lca##_t_reaper (u32 client_index) \
213 { \
214  vpe_api_main_t *vam = &vpe_api_main; \
215  vpe_client_registration_t *rp; \
216  uword *p; \
217  \
218  p = hash_get (vam->lca##_registration_hash, client_index); \
219  if (p) \
220  { \
221  rp = pool_elt_at_index (vam->lca##_registrations, p[0]); \
222  pool_put (vam->lca##_registrations, rp); \
223  hash_unset (vam->lca##_registration_hash, client_index); \
224  } \
225  return (NULL); \
226 } \
227  \
228 VL_MSG_API_REAPER_FUNCTION (vl_api_want_##lca##_t_reaper); \
229 
230 #define foreach_registration_hash \
231 _(interface_events) \
232 _(to_netconf_server) \
233 _(from_netconf_server) \
234 _(to_netconf_client) \
235 _(from_netconf_client) \
236 _(oam_events) \
237 _(bfd_events) \
238 _(wc_ip6_nd_events) \
239 _(wc_ip4_arp_events) \
240 _(ip6_ra_events) \
241 _(dhcp6_pd_reply_events) \
242 _(dhcp6_reply_events)
243 
244 typedef struct
245 {
246  u32 client_index; /* in memclnt registration pool */
247  u32 client_pid;
248 } vpe_client_registration_t;
249 
250 struct _vl_api_ip4_arp_event;
251 struct _vl_api_ip6_nd_event;
252 
253 typedef struct
254 {
255 #define _(a) uword *a##_registration_hash; \
256  vpe_client_registration_t * a##_registrations;
257  foreach_registration_hash
258 #undef _
259  /* notifications happen really early in the game */
260  u8 link_state_process_up;
261 
262  /* ip4 arp event registration pool */
263  struct _vl_api_ip4_arp_event *arp_events;
264 
265  /* ip6 nd event registration pool */
266  struct _vl_api_ip6_nd_event *nd_events;
267 
268  /* convenience */
269  vlib_main_t *vlib_main;
270  vnet_main_t *vnet_main;
271 } vpe_api_main_t;
272 
273 extern vpe_api_main_t vpe_api_main;
274 
275 #endif /* __api_helper_macros_h__ */
276 
277 /*
278  * fd.io coding-style-patch-verification: ON
279  *
280  * Local Variables:
281  * eval: (c-set-style "gnu")
282  * End:
283  */
vpe_api_main_t::vnet_main
vnet_main_t * vnet_main
Definition: api_helper_macros.h:270
vpe_api_main_t
Definition: api_helper_macros.h:253
vnet_get_main
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
vpe_api_main_t::vlib_main
vlib_main_t * vlib_main
Definition: api_helper_macros.h:269
u8
unsigned char u8
Definition: types.h:56
vpe_api_main_t::arp_events
struct _vl_api_ip4_arp_event * arp_events
Definition: api_helper_macros.h:263
u32
unsigned int u32
Definition: types.h:88
vpe_client_registration_t::client_pid
u32 client_pid
Definition: api_helper_macros.h:247
vpe_api_main_t::nd_events
struct _vl_api_ip6_nd_event * nd_events
Definition: api_helper_macros.h:266
vnet_sw_if_index_is_api_valid
static uword vnet_sw_if_index_is_api_valid(u32 sw_if_index)
Definition: api_helper_macros.h:112
vnet_main_t
Definition: vnet.h:51
vpe_api_main_t::link_state_process_up
foreach_registration_hash u8 link_state_process_up
Definition: api_helper_macros.h:260
vpe_client_registration_t
Definition: api_helper_macros.h:244
vnet_sw_interface_is_api_valid
static uword vnet_sw_interface_is_api_valid(vnet_main_t *vnm, u32 sw_if_index)
Definition: interface_funcs.h:252
vlib_main_t
Definition: main.h:59
uword
u64 uword
Definition: types.h:112
vpe_client_registration_t::client_index
u32 client_index
Definition: api_helper_macros.h:246
vpe_api_main
vpe_api_main_t vpe_api_main
Definition: interface_api.c:49
foreach_registration_hash
#define foreach_registration_hash
Definition: api_helper_macros.h:230