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/* Simulate IO errors after each byte in a stream.
* Verifies proper error propagation.
*/
#include <stdio.h>
#include <pb_decode.h>
#include <pb_encode.h>
#include "alltypes.pb.h"
#include "test_helpers.h"
typedef struct
{
uint8_t *buffer;
size_t fail_after;
} faulty_stream_t;
bool read_callback(pb_istream_t *stream, uint8_t *buf, size_t count)
{
faulty_stream_t *state = stream->state;
while (count--)
{
if (state->fail_after == 0)
PB_RETURN_ERROR(stream, "simulated");
state->fail_after--;
*buf++ = *state->buffer++;
}
return true;
}
bool write_callback(pb_ostream_t *stream, const uint8_t *buf, size_t count)
{
faulty_stream_t *state = stream->state;
while (count--)
{
if (state->fail_after == 0)
PB_RETURN_ERROR(stream, "simulated");
state->fail_after--;
*state->buffer++ = *buf++;
}
return true;
}
int main()
{
uint8_t buffer[2048];
size_t msglen;
AllTypes msg = AllTypes_init_zero;
/* Get some base data to run the tests with */
SET_BINARY_MODE(stdin);
msglen = fread(buffer, 1, sizeof(buffer), stdin);
/* Test IO errors on decoding */
{
bool status;
pb_istream_t stream = {&read_callback, NULL, SIZE_MAX};
faulty_stream_t fs;
size_t i;
for (i = 0; i < msglen; i++)
{
stream.bytes_left = msglen;
stream.state = &fs;
fs.buffer = buffer;
fs.fail_after = i;
status = pb_decode(&stream, AllTypes_fields, &msg);
if (status != false)
{
fprintf(stderr, "Unexpected success in decode\n");
return 2;
}
else if (strcmp(stream.errmsg, "simulated") != 0)
{
fprintf(stderr, "Wrong error in decode: %s\n", stream.errmsg);
return 3;
}
}
stream.bytes_left = msglen;
stream.state = &fs;
fs.buffer = buffer;
fs.fail_after = msglen;
status = pb_decode(&stream, AllTypes_fields, &msg);
if (!status)
{
fprintf(stderr, "Decoding failed: %s\n", stream.errmsg);
return 4;
}
}
/* Test IO errors on encoding */
{
bool status;
pb_ostream_t stream = {&write_callback, NULL, SIZE_MAX, 0};
faulty_stream_t fs;
size_t i;
for (i = 0; i < msglen; i++)
{
stream.max_size = msglen;
stream.bytes_written = 0;
stream.state = &fs;
fs.buffer = buffer;
fs.fail_after = i;
status = pb_encode(&stream, AllTypes_fields, &msg);
if (status != false)
{
fprintf(stderr, "Unexpected success in encode\n");
return 5;
}
else if (strcmp(stream.errmsg, "simulated") != 0)
{
fprintf(stderr, "Wrong error in encode: %s\n", stream.errmsg);
return 6;
}
}
stream.max_size = msglen;
stream.bytes_written = 0;
stream.state = &fs;
fs.buffer = buffer;
fs.fail_after = msglen;
status = pb_encode(&stream, AllTypes_fields, &msg);
if (!status)
{
fprintf(stderr, "Encoding failed: %s\n", stream.errmsg);
return 7;
}
}
return 0;
}
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