FD.io VPP  v18.04-17-g3a0d853
Vector Packet Processing
jvpp_common.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #define _GNU_SOURCE /* for strcasestr(3) */
16 
17 #include <vnet/api_errno.h>
18 #include "jvpp_common.h"
19 
20 #ifndef JVPP_DEBUG
21 #define JVPP_DEBUG 0
22 #endif
23 
24 #if JVPP_DEBUG == 1
25 #define DEBUG_LOG(...) clib_warning(__VA_ARGS__)
26 #else
27 #define DEBUG_LOG(...)
28 #endif
29 
30 #define _(error,errorCode,msg) \
31 if (errorCode == code) \
32  message = msg; \
33 else
34 
35 #define get_error_message(errno) \
36 int code = errno; \
37 foreach_vnet_api_error \
38  message = "Reason unknown";
39 
40 /* shared jvpp main structure */
41 jvpp_main_t jvpp_main __attribute__((aligned (64)));
42 
43 void call_on_error(const char* callName, int contextId, int retval,
44  jclass callbackClass, jobject callbackObject,
45  jclass callbackExceptionClass) {
46  DEBUG_LOG("\nCallOnError : callback=%s, retval=%d, context=%d\n", callName,
47  clib_net_to_host_u32(retval), clib_net_to_host_u32(context));
48  JNIEnv *env = jvpp_main.jenv;
49  if (!callbackClass) {
50  DEBUG_LOG("CallOnError : jm->callbackClass is null!\n");
51  return;
52  }
53  jmethodID excConstructor = (*env)->GetMethodID(env, callbackExceptionClass,
54  "<init>", "(Ljava/lang/String;Ljava/lang/String;II)V");
55  if (!excConstructor) {
56  DEBUG_LOG("CallOnError : excConstructor is null!\n");
57  return;
58  }
59  jmethodID callbackExcMethod = (*env)->GetMethodID(env, callbackClass,
60  "onError", "(Lio/fd/vpp/jvpp/VppCallbackException;)V");
61  if (!callbackExcMethod) {
62  DEBUG_LOG("CallOnError : callbackExcMethod is null!\n");
63  return;
64  }
65 
66  char *message;
67  get_error_message(clib_net_to_host_u32(retval));
68  jobject excObject = (*env)->NewObject(env, callbackExceptionClass,
69  excConstructor, (*env)->NewStringUTF(env, callName),
70  (*env)->NewStringUTF(env, message),
71  clib_net_to_host_u32(contextId), clib_net_to_host_u32(retval));
72  if (!excObject) {
73  DEBUG_LOG("CallOnError : excObject is null!\n");
74  return;
75  }
76 
77  (*env)->CallVoidMethod(env, callbackObject, callbackExcMethod, excObject);
78  DEBUG_LOG("CallOnError : Response sent\n");
79 }
80 #undef _
81 
82 u32 get_message_id(JNIEnv *env, const char *key) {
84  if (!p) {
85  jclass exClass = (*env)->FindClass(env, "java/lang/IllegalStateException");
86  char *msgBuf = clib_mem_alloc(strlen(key) + 70);
87  strcpy(msgBuf, "API mismatch detected: ");
88  strcat(msgBuf, key);
89  strcat(msgBuf, " is missing in global name_crc hash table.");
90  DEBUG_LOG("%s", msgBuf);
91  DEBUG_LOG("Possible reasons:");
92  DEBUG_LOG("1) incompatible VPP version used");
93  DEBUG_LOG("2) message present in JSON file but not in global name_crc table");
94  (*env)->ThrowNew(env, exClass, msgBuf);
95  clib_mem_free(msgBuf);
96  return 0;
97  }
98  return (u32) p[0];
99 }
#define get_error_message(errno)
Definition: jvpp_common.c:35
u32 get_message_id(JNIEnv *env, const char *key)
Retrieves message id based on message name and crc (key format: name_crc).
Definition: jvpp_common.c:82
#define hash_get(h, key)
Definition: hash.h:248
jvpp_main_t jvpp_main
Definition: jvpp_common.c:41
JNIEnv * jenv
Definition: jvpp_common.h:32
unsigned int u32
Definition: types.h:88
static void clib_mem_free(void *p)
Definition: mem.h:179
static void * clib_mem_alloc(uword size)
Definition: mem.h:112
u64 uword
Definition: types.h:112
uword * messages_hash
Definition: jvpp_common.h:40
void call_on_error(const char *callName, int contextId, int retval, jclass callbackClass, jobject callbackObject, jclass callbackExceptionClass)
Calls onError callback on callbackObject reference.
Definition: jvpp_common.c:43
#define DEBUG_LOG(...)
Definition: jvpp_common.c:27