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litespeed-quic/tests/test_ackparse_gquic_be.c
Dmitri Tikhonov 06b2a2363e Release 2.27.1 
- [API] New knob to set outgoing packet batch size.
- Aborted connection now become tickable immediately.
- Abort connection when HTTP/3 frame cannot be opened (can only happen
  when malloc fails).
2021-01-06 09:00:05 -05:00

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/* Copyright (c) 2017 - 2021 LiteSpeed Technologies Inc. See LICENSE. */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/queue.h>
#ifndef WIN32
#include <sys/time.h>
#else
#include "vc_compat.h"
#endif
#include "lsquic_types.h"
#include "lsquic_parse.h"
#include "lsquic_rechist.h"
#include "lsquic_util.h"
#include "lsquic.h"
#include "lsquic_hash.h"
#include "lsquic_conn.h"
static struct lsquic_conn lconn = LSCONN_INITIALIZER_CIDLEN(lconn, 0);
static const struct parse_funcs *const pf = select_pf_by_ver(LSQVER_043);
static lsquic_packno_t
n_acked (const struct ack_info *acki)
{
lsquic_packno_t n = 0;
unsigned i;
for (i = 0; i < acki->n_ranges; ++i)
n += acki->ranges[i].high - acki->ranges[i].low + 1;
return n;
}
static void
test1 (void)
{
/* Test taken from quic_framer_test.cc -- NewAckFrameOneAckBlock */
unsigned char ack_buf[] = {
0x45,
0x12, 0x34, /* Largest acked */
0x00, 0x00, /* Delta time */
0x12, 0x34, /* Block length */
0x00, /* Number of timestamps */
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct (8)", len == sizeof(ack_buf)));
assert(("Number of ranges is 1", acki.n_ranges == 1));
assert(("Largest acked is 0x1234", acki.ranges[0].high == 0x1234));
assert(("Lowest acked is 1", acki.ranges[0].low == 1));
unsigned n = n_acked(&acki);
assert(("Number of acked packets is 0x1234", n == 0x1234));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
static void
test2 (void)
{
/* Test taken from quic_framer_test.cc -- NewAckFrameOneAckBlock */
unsigned char ack_buf[] = {
0x65,
0x12, 0x34, /* Largest acked */
0x00, 0x00, /* Zero delta time. */
0x04, /* Num ack blocks ranges. */
0x00, 0x01, /* First ack block length. */
0x01, /* Gap to next block. */
0x0e, 0xaf, /* Ack block length. */
0xff, /* Gap to next block. */
0x00, 0x00, /* Ack block length. */
0x91, /* Gap to next block. */
0x01, 0xea, /* Ack block length. */
0x05, /* Gap to next block. */
0x00, 0x04, /* Ack block length. */
0x02, /* Number of timestamps. */
0x01, /* Delta from largest observed. */
0x10, 0x32, 0x54, 0x76, /* Delta time. */ /* XXX do we use this at all? */
0x02, /* Delta from largest observed. */
0x10, 0x32, /* Delta time. */
};
/* We should get the following array of ranges:
* high low
* 0x1234 0x1234
* 0x1232 0x384
* 0x1F3 0xA
* 0x4 0x1
*/
static const struct { unsigned high, low; } ranges[] = {
{ 0x1234, 0x1234 },
{ 0x1232, 0x384 },
{ 0x1F3, 0xA },
{ 0x4, 0x1 },
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct (29)", len == sizeof(ack_buf)));
assert(("Number of ranges is 4", acki.n_ranges == 4));
assert(("Largest acked is 0x1234", acki.ranges[0].high == 0x1234));
unsigned n = n_acked(&acki);
assert(("Number of acked packets is 4254", n == 4254));
for (n = 0; n < 4; ++n)
assert(("Range checks out", ranges[n].high == acki.ranges[n].high
&& ranges[n].low == acki.ranges[n].low));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
static void
test3 (void)
{
/* Generated by our own code, but failed to parse... */
unsigned char ack_buf[] = {
0x60, /* More than one ack block, 1 byte largest observed, 1 byte block length */
0x06, /* Largest ACKed */
0x00, 0x00, /* Delta time */
0x01, /* Num ACK block ranges */
0x01, /* First ACK block length */
0x02, /* Gap to next block */
0x03, /* Ack block length */
0x00 /* Number of timestamps */
};
/* We should get the following array of ranges:
* high low
* 6 6
* 3 1
*/
static const struct { unsigned high, low; } ranges[] = {
{ 6, 6, },
{ 3, 1, },
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct (9)", len == sizeof(ack_buf)));
assert(("Number of ranges is 2", acki.n_ranges == 2));
assert(("Largest acked is 6", acki.ranges[0].high == 6));
unsigned n = n_acked(&acki);
assert(("Number of acked packets is 4", n == 4));
for (n = 0; n < 2; ++n)
assert(("Range checks out", ranges[n].high == acki.ranges[n].high
&& ranges[n].low == acki.ranges[n].low));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
static void
test4 (void)
{
unsigned char ack_buf[] = {
0x60, /* More than one ack block, 1 byte largest observed, 1 byte block length */
0x03, /* Largest ACKed */
0x23, 0x00, /* Delta time */
0x01, /* Num ACK block ranges */
0x01, /* First ack block length */
0x01, /* Gap */
0x01, /* Ack block length */
0x00, /* Number of timestamps */
};
/* We should get the following array of ranges:
* high low
* 6 6
* 3 1
*/
static const struct { unsigned high, low; } ranges[] = {
{ 3, 3, },
{ 1, 1, },
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct (9)", len == sizeof(ack_buf)));
assert(("Number of ranges is 2", acki.n_ranges == 2));
assert(("Largest acked is 3", acki.ranges[0].high == 3));
unsigned n = n_acked(&acki);
assert(("Number of acked packets is 2", n == 2));
for (n = 0; n < 2; ++n)
assert(("Range checks out", ranges[n].high == acki.ranges[n].high
&& ranges[n].low == acki.ranges[n].low));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
/* Four-byte packet numbers */
static void
test5 (void)
{
unsigned char ack_buf[] = {
0x60
| (2 << 2) /* Four-byte largest acked */
| (2 << 0) /* Four-byte ACK block length */
,
0x23, 0x45, 0x67, 0x89,
0x00, 0x00, /* Zero delta time. */
0x01, /* Num ack blocks ranges. */
0x00, 0x00, 0x00, 0x01, /* First ack block length. */
33 - 1, /* Gap to next block. */
0x23, 0x45, 0x67, 0x68, /* Ack block length. */
0x00, /* Number of timestamps. */
};
/* We should get the following array of ranges:
* high low
* 6 6
* 3 1
*/
static const struct { unsigned high, low; } ranges[] = {
{ 0x23456789, 0x23456789, },
{ 0x23456768, 1, },
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct (9)", len == sizeof(ack_buf)));
assert(("Number of ranges is 2", acki.n_ranges == 2));
assert(("Largest acked is 0x23456789", acki.ranges[0].high == 0x23456789));
lsquic_packno_t n = n_acked(&acki);
assert(("Number of acked packets is correct", n == 0x23456768 + 1));
for (n = 0; n < 2; ++n)
assert(("Range checks out", ranges[n].high == acki.ranges[n].high
&& ranges[n].low == acki.ranges[n].low));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
/* Six-byte packet numbers */
static void
test6 (void)
{
unsigned char ack_buf[] = {
0x60
| (3 << 2) /* Six-byte largest acked */
| (3 << 0) /* Six-byte ACK block length */
,
0xAB, 0xCD, 0x23, 0x45, 0x67, 0x89,
0x00, 0x00, /* Zero delta time. */
0x01, /* Num ack blocks ranges. */
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, /* First ack block length. */
33 - 1, /* Gap to next block. */
0xAB, 0xCD, 0x23, 0x45, 0x67, 0x68, /* Ack block length. */
0x00, /* Number of timestamps. */
};
static const struct { lsquic_packno_t high, low; } ranges[] = {
{ 0xABCD23456789, 0xABCD23456789, },
{ 0xABCD23456768, 1, },
};
struct ack_info acki;
memset(&acki, 0xF1, sizeof(acki));
int len = pf->pf_parse_ack_frame(ack_buf, sizeof(ack_buf), &acki, 0);
assert(("Parsed length is correct", len == sizeof(ack_buf)));
assert(("Number of ranges is 2", acki.n_ranges == 2));
assert(("Largest acked is 0xABCD23456789", acki.ranges[0].high == 0xABCD23456789));
lsquic_packno_t n = n_acked(&acki);
assert(("Number of acked packets is correct", n == 0xABCD23456768 + 1));
for (n = 0; n < 2; ++n)
assert(("Range checks out", ranges[n].high == acki.ranges[n].high
&& ranges[n].low == acki.ranges[n].low));
{
size_t sz;
for (sz = 1; sz < sizeof(ack_buf); ++sz)
{
len = pf->pf_parse_ack_frame(ack_buf, sz, &acki, 0);
assert(("Parsing truncated frame failed", len < 0));
}
}
}
static void
test_max_ack (void)
{
lsquic_rechist_t rechist;
lsquic_time_t now;
unsigned i;
int has_missing, sz[2];
const struct lsquic_packno_range *range;
unsigned char buf[1500];
struct ack_info acki;
lsquic_rechist_init(&rechist, 0, 0);
now = lsquic_time_now();
for (i = 1; i <= 300; ++i)
{
lsquic_rechist_received(&rechist, i * 10, now);
now += i * 1000;
}
memset(buf, 0xAA, sizeof(buf));
lsquic_packno_t largest = 0;
sz[0] = pf->pf_gen_ack_frame(buf, sizeof(buf),
(gaf_rechist_first_f) lsquic_rechist_first,
(gaf_rechist_next_f) lsquic_rechist_next,
(gaf_rechist_largest_recv_f) lsquic_rechist_largest_recv,
&rechist, now, &has_missing, &largest, NULL);
assert(sz[0] > 0);
assert(sz[0] <= (int) sizeof(buf));
assert(has_missing);
assert(0 == buf[ sz[0] - 1 ]); /* Number of timestamps */
assert(0xAA == buf[ sz[0] ]);
sz[1] = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0);
assert(sz[1] == sz[0]);
assert(256 == acki.n_ranges);
for (range = lsquic_rechist_first(&rechist), i = 0;
range && i < acki.n_ranges;
range = lsquic_rechist_next(&rechist), ++i)
{
assert(range->high == acki.ranges[i].high);
assert(range->low == acki.ranges[i].low);
}
assert(i == 256);
lsquic_rechist_cleanup(&rechist);
}
static void
test_ack_truncation (void)
{
lsquic_rechist_t rechist;
lsquic_time_t now;
unsigned i;
int has_missing, sz[2];
const struct lsquic_packno_range *range;
unsigned char buf[1500];
struct ack_info acki;
size_t bufsz;
lsquic_rechist_init(&rechist, 0, 0);
now = lsquic_time_now();
for (i = 1; i <= 300; ++i)
{
lsquic_rechist_received(&rechist, i * 10, now);
now += i * 1000;
}
for (bufsz = 200; bufsz < 210; ++bufsz)
{
memset(buf, 0xAA, sizeof(buf));
lsquic_packno_t largest = 0;
sz[0] = pf->pf_gen_ack_frame(buf, bufsz,
(gaf_rechist_first_f) lsquic_rechist_first,
(gaf_rechist_next_f) lsquic_rechist_next,
(gaf_rechist_largest_recv_f) lsquic_rechist_largest_recv,
&rechist, now, &has_missing, &largest, NULL);
assert(sz[0] > 0);
assert(sz[0] <= (int) bufsz);
assert(has_missing);
assert(0 == buf[ sz[0] - 1 ]); /* Number of timestamps */
assert(0xAA == buf[ sz[0] ]);
sz[1] = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0);
assert(sz[1] == sz[0]);
assert(acki.n_ranges < 256);
for (range = lsquic_rechist_first(&rechist), i = 0;
range && i < acki.n_ranges;
range = lsquic_rechist_next(&rechist), ++i)
{
assert(range->high == acki.ranges[i].high);
assert(range->low == acki.ranges[i].low);
}
}
lsquic_rechist_cleanup(&rechist);
}
static void
test_empty_ack (void)
{
int len;
unsigned char buf[] = { 0x40, 0x00, 0xFF, 0xFF, 0x00, 0x00,
/* fluff: */ 0x12, 0x23, 0x34, 0x45, };
struct ack_info acki;
len = pf->pf_parse_ack_frame(buf, sizeof(buf), &acki, 0);
assert(6 == len);
assert(empty_ack_frame(&acki));
}
int
main (void)
{
lsquic_global_init(LSQUIC_GLOBAL_SERVER);
test1();
test2();
test3();
test4();
test5();
test6();
test_max_ack();
test_ack_truncation();
test_empty_ack();
return 0;
}
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