1 /*
2 * Copyright 2018 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 * This fuzzer exercises the agentx PDU parsing code.
17 */
18 #include <net-snmp/net-snmp-config.h>
19 #include <net-snmp/net-snmp-includes.h>
20 /* We build with the agent/mibgroup/agentx dir in an -I */
21 #include <protocol.h>
22 #include <stddef.h>
23 #include <stdint.h>
24 #include <stdlib.h>
25
LLVMFuzzerInitialize(int * argc,char *** argv)26 int LLVMFuzzerInitialize(int *argc, char ***argv) {
27 if (getenv("NETSNMP_DEBUGGING") != NULL) {
28 /*
29 * Turn on all debugging, to help understand what
30 * bits of the parser are running.
31 */
32 snmp_enable_stderrlog();
33 snmp_set_do_debugging(1);
34 debug_register_tokens("");
35 }
36 return 0;
37 }
38
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)39 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
40 netsnmp_pdu *pdu = SNMP_MALLOC_TYPEDEF(netsnmp_pdu);
41 netsnmp_session session;
42
43 session.version = AGENTX_VERSION_1;
44 agentx_parse(&session, pdu, (unsigned char *)data, size);
45 snmp_free_pdu(pdu);
46 return 0;
47 }
48