litespeed-quic/tests/test_frame_chop.c

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/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc. See LICENSE. */
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/*
* Write several things to HEADERS stream and check the results. What
* varies is the amount of bytes that are written to stream every time.
* This will exercise buffering in frame writer and verify that contents
* are written out correctly no matter where frab writing leaves off
* and picks up.
*/
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef WIN32
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#include <unistd.h>
#else
#include <getopt.h>
#endif
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#include <sys/queue.h>
#include "lsquic.h"
#include "lshpack.h"
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#include "lsquic_logger.h"
#include "lsquic_mm.h"
#include "lsquic_frame_common.h"
#include "lsquic_frame_writer.h"
#include "lsquic_frame_reader.h"
#if LSQUIC_CONN_STATS
#include "lsquic_int_types.h"
#include "lsquic_hash.h"
#include "lsquic_conn.h"
#endif
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struct lsquic_stream
{
size_t sm_write_off,
sm_buf_sz; /* Number of bytes allocated */
size_t sm_max_write;
size_t sm_read_off;
unsigned char *sm_buf;
};
static struct lsquic_stream *
stream_new (size_t max_write)
{
struct lsquic_stream *stream = calloc(1, sizeof(*stream));
stream->sm_max_write = max_write;
return stream;
}
static void
stream_destroy (struct lsquic_stream *stream)
{
free(stream->sm_buf);
free(stream);
}
#define reset_output(max_) do { \
output.sz = 0; \
if (max_) \
output.max = max_; \
else \
output.max = sizeof(output.buf);\
} while (0)
static ssize_t
stream_write (struct lsquic_stream *stream, struct lsquic_reader *reader)
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{
size_t sz;
sz = reader->lsqr_size(reader->lsqr_ctx);
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if (sz > stream->sm_max_write)
sz = stream->sm_max_write;
if (stream->sm_write_off + sz > stream->sm_buf_sz)
{
if (stream->sm_write_off + sz < stream->sm_buf_sz * 2)
stream->sm_buf_sz *= 2;
else
stream->sm_buf_sz = stream->sm_write_off + sz;
stream->sm_buf = realloc(stream->sm_buf, stream->sm_buf_sz);
}
sz = reader->lsqr_read(reader->lsqr_ctx,
stream->sm_buf + stream->sm_write_off, sz);
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stream->sm_write_off += sz;
return sz;
}
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#define XHDR(name_, value_) .buf = name_ value_, .name_offset = 0, .name_len = sizeof(name_) - 1, .val_offset = sizeof(name_) - 1, .val_len = sizeof(value_) - 1,
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static void
test_chop (unsigned max_write_sz)
{
struct lsquic_frame_writer *fw;
struct lsquic_stream *stream;
struct lsquic_mm mm;
struct lshpack_enc henc;
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int s;
#if LSQUIC_CONN_STATS
struct conn_stats conn_stats;
memset(&conn_stats, 0, sizeof(conn_stats));
#endif
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lsquic_mm_init(&mm);
lshpack_enc_init(&henc);
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stream = stream_new(max_write_sz);
fw = lsquic_frame_writer_new(&mm, stream, 0, &henc, stream_write,
#if LSQUIC_CONN_STATS
&conn_stats,
#endif
0);
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struct lsxpack_header header_arr[] =
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{
{ XHDR(":status", "302") },
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};
struct lsquic_http_headers headers = {
.count = 1,
.headers = header_arr,
};
s = lsquic_frame_writer_write_headers(fw, 12345, &headers, 0, 100);
assert(0 == s);
struct lsquic_http2_setting settings[] = { { 1, 2, }, { 3, 4, } };
s = lsquic_frame_writer_write_settings(fw, settings, 2);
assert(0 == s);
/* TODO: server must not send priority frames, add a check for that
* error condition.
*/
s = lsquic_frame_writer_write_priority(fw, 3, 0, 1, 256);
assert(0 == s);
while (lsquic_frame_writer_have_leftovers(fw))
{
s = lsquic_frame_writer_flush(fw);
assert(0 == s);
}
const unsigned char expected_buf[] = {
/* Length: */ 0x00, 0x00, 0x09,
/* Type: */ HTTP_FRAME_HEADERS,
/* Flags: */ HFHF_END_HEADERS|HFHF_PRIORITY,
/* Stream Id: */ 0x00, 0x00, 0x30, 0x39,
/* Dep stream id: */0x00, 0x00, 0x00, 0x00,
/* Weight: */ 100 - 1,
/* Block fragment: */
0x48, 0x82, 0x64, 0x02,
/* Length: */ 0x00, 0x00, 0x0C,
/* Type: */ HTTP_FRAME_SETTINGS,
/* Flags: */ 0x00,
/* Stream Id: */ 0x00, 0x00, 0x00, 0x00,
/* Payload: */ 0x00, 0x01, 0x00, 0x00, 0x00, 0x02,
0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
/* Length: */ 0x00, 0x00, 5,
/* Type: */ HTTP_FRAME_PRIORITY,
/* Flags: */ 0x00,
/* Stream Id: */ 0x00, 0x00, 0x00, 0x03,
/* Dep stream Id: */0x00, 0x00, 0x00, 0x01,
/* Weight: */ 0xFF,
};
assert(stream->sm_write_off == sizeof(expected_buf));
assert(0 == memcmp(stream->sm_buf, expected_buf, sizeof(expected_buf)));
lsquic_frame_writer_destroy(fw);
stream_destroy(stream);
lshpack_enc_cleanup(&henc);
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lsquic_mm_cleanup(&mm);
}
int
main (int argc, char **argv)
{
const unsigned write_sizes[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20,
30, 100, 200, 255, 0xFFF, 0x1000, 0x100D,
UINT_MAX, };
unsigned i;
int opt, max_write_sz = -1;
while (-1 != (opt = getopt(argc, argv, "l:s:")))
{
switch (opt)
{
case 'l':
lsquic_log_to_fstream(stderr, LLTS_NONE);
lsquic_logger_lopt(optarg);
break;
case 's':
max_write_sz = atoi(optarg);
break;
default:
exit(1);
}
}
if (-1 == max_write_sz)
for (i = 0; i < sizeof(write_sizes) / sizeof(write_sizes[0]); ++i)
test_chop(write_sizes[i]);
else
test_chop(max_write_sz);
return 0;
}