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DHCP fuzzer: add comments

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This commit is contained in:
Guido Vranken 2017-08-09 16:23:48 +02:00
parent 0123fb3f7d
commit 519fbf338b
1 changed files with 7 additions and 0 deletions
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7
src/openvpn/fuzzer-dhcp.c
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@ -6,21 +6,28 @@ int LLVMFuzzerInitialize(int *argc, char ***argv)
{
return 1;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct gc_arena gc;
struct buffer ipbuf;
in_addr_t ret;
/* Encapsulate raw input buffer in a struct buffer */
ipbuf = alloc_buf(size);
if ( buf_write(&ipbuf, data, size) == false ) {
goto cleanup;
}
/* Change internal buffer state to test whether dhcp_extract_router_msg
* depends on a certain state */
fuzzer_alter_buffer(&ipbuf);
ret = dhcp_extract_router_msg(&ipbuf);
#ifdef MSAN
test_undefined_memory(&ret, sizeof(ret));
#endif
cleanup:
free_buf(&ipbuf);