mirror of https://github.com/grpc/grpc.git
The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
2.5 KiB
102 lines
2.5 KiB
8 years ago
|
/* Generates a random, valid protobuf message. Useful to seed
|
||
|
|
* external fuzzers such as afl-fuzz.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <pb_encode.h>
|
||
|
|
#include <pb_common.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <time.h>
|
||
|
|
#include "alltypes_static.pb.h"
|
||
|
|
|
||
|
|
static uint64_t random_seed;
|
||
|
|
|
||
|
|
/* Uses xorshift64 here instead of rand() for both speed and
|
||
|
|
* reproducibility across platforms. */
|
||
|
|
static uint32_t rand_word()
|
||
|
|
{
|
||
|
|
random_seed ^= random_seed >> 12;
|
||
|
|
random_seed ^= random_seed << 25;
|
||
|
|
random_seed ^= random_seed >> 27;
|
||
|
|
return random_seed * 2685821657736338717ULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Fills a buffer with random data. */
|
||
|
|
static void rand_fill(uint8_t *buf, size_t count)
|
||
|
|
{
|
||
|
|
while (count--)
|
||
|
|
{
|
||
|
|
*buf++ = rand_word() & 0xff;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check that size/count fields do not exceed their max size.
|
||
|
|
* Otherwise we would have to loop pretty long in generate_message().
|
||
|
|
* Note that there may still be a few encoding errors from submessages.
|
||
|
|
*/
|
||
|
|
static void limit_sizes(alltypes_static_AllTypes *msg)
|
||
|
|
{
|
||
|
|
pb_field_iter_t iter;
|
||
|
|
pb_field_iter_begin(&iter, alltypes_static_AllTypes_fields, msg);
|
||
|
|
while (pb_field_iter_next(&iter))
|
||
|
|
{
|
||
|
|
if (PB_LTYPE(iter.pos->type) == PB_LTYPE_BYTES)
|
||
|
|
{
|
||
|
|
((pb_bytes_array_t*)iter.pData)->size %= iter.pos->data_size - PB_BYTES_ARRAY_T_ALLOCSIZE(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PB_HTYPE(iter.pos->type) == PB_HTYPE_REPEATED)
|
||
|
|
{
|
||
|
|
*((pb_size_t*)iter.pSize) %= iter.pos->array_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PB_HTYPE(iter.pos->type) == PB_HTYPE_ONEOF)
|
||
|
|
{
|
||
|
|
/* Set the oneof to this message type with 50% chance. */
|
||
|
|
if (rand_word() & 1)
|
||
|
|
{
|
||
|
|
*((pb_size_t*)iter.pSize) = iter.pos->tag;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void generate_message()
|
||
|
|
{
|
||
|
|
alltypes_static_AllTypes msg;
|
||
|
|
uint8_t buf[8192];
|
||
|
|
pb_ostream_t stream = {0};
|
||
|
|
|
||
|
|
do {
|
||
|
|
if (stream.errmsg)
|
||
|
|
fprintf(stderr, "Encoder error: %s\n", stream.errmsg);
|
||
|
|
|
||
|
|
stream = pb_ostream_from_buffer(buf, sizeof(buf));
|
||
|
|
rand_fill((void*)&msg, sizeof(msg));
|
||
|
|
limit_sizes(&msg);
|
||
|
|
} while (!pb_encode(&stream, alltypes_static_AllTypes_fields, &msg));
|
||
|
|
|
||
|
|
fwrite(buf, 1, stream.bytes_written, stdout);
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
if (argc > 1)
|
||
|
|
{
|
||
|
|
random_seed = atol(argv[1]);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
random_seed = time(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "Random seed: %llu\n", (long long unsigned)random_seed);
|
||
|
|
|
||
|
|
generate_message();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|