litespeed-quic/tests/test_ver_nego.c

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/* Copyright (c) 2017 - 2022 LiteSpeed Technologies Inc. See LICENSE. */
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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/queue.h>
#ifndef WIN32
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#include <sys/time.h>
#endif
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#include "lsquic.h"
#include "lsquic_types.h"
#include "lsquic_packet_common.h"
#include "lsquic_parse.h"
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#include "lsquic_parse_common.h"
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#include "lsquic_mm.h"
#include "lsquic_packet_in.h"
#include "lsquic_engine_public.h"
#include "lsquic_version.h"
/* The struct is used to test both generation and parsing of version
* negotiation packet.
*/
struct gen_ver_nego_test {
int gvnt_lineno;
/* Generate: inputs; parse: outputs */
enum lsquic_version
gvnt_gen_ver;
uint64_t gvnt_cid;
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unsigned gvnt_versions;
size_t gvnt_bufsz;
/* Generate: outputs; parse: inputs */
int gvnt_len; /* Retval */
char gvnt_buf[0x40]; /* Contents */
};
static const struct gen_ver_nego_test tests[] = {
{ .gvnt_lineno = __LINE__,
.gvnt_cid = 0x0102030405060708UL,
.gvnt_versions = (1 << LSQVER_043),
.gvnt_gen_ver = LSQVER_043,
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.gvnt_bufsz = 12,
.gvnt_len = -1, /* Buffer size is too small */
},
{ .gvnt_lineno = __LINE__,
.gvnt_cid = 0x0102030405060708UL,
.gvnt_versions = (1 << LSQVER_043) | (1 << N_LSQVER),
.gvnt_gen_ver = LSQVER_043,
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.gvnt_bufsz = 20,
.gvnt_len = -1, /* Invalid version specified in the bitmask */
},
{ .gvnt_lineno = __LINE__,
.gvnt_cid = 0x0102030405060708UL,
.gvnt_versions = (1 << LSQVER_043) | (1 << LSQVER_046),
.gvnt_gen_ver = LSQVER_043,
.gvnt_bufsz = 17,
.gvnt_len = 17,
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.gvnt_buf = {
PACKET_PUBLIC_FLAGS_VERSION|
PACKET_PUBLIC_FLAGS_8BYTE_CONNECTION_ID,
0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, /* Connection ID */
'Q', '0', '4', '3',
'Q', '0', '4', '6',
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},
},
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};
static void
test_parsing_ver_nego (const struct gen_ver_nego_test *gvnt)
{
int s;
lsquic_packet_in_t *packet_in;
struct lsquic_mm mm;
struct ver_iter vi;
lsquic_ver_tag_t ver_tag;
enum lsquic_version version;
struct packin_parse_state ppstate;
unsigned version_bitmask = gvnt->gvnt_versions;
lsquic_mm_init(&mm);
packet_in = lsquic_mm_get_packet_in(&mm);
packet_in->pi_data = lsquic_mm_get_packet_in_buf(&mm, 1370);
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packet_in->pi_flags |= PI_OWN_DATA;
memcpy(packet_in->pi_data, gvnt->gvnt_buf, gvnt->gvnt_len);
s = lsquic_parse_packet_in_begin(packet_in, gvnt->gvnt_len, 0, GQUIC_CID_LEN, &ppstate);
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assert(s == 0);
for (s = lsquic_packet_in_ver_first(packet_in, &vi, &ver_tag); s;
s = lsquic_packet_in_ver_next(&vi, &ver_tag))
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{
version = lsquic_tag2ver(ver_tag);
assert(version < N_LSQVER);
assert(version_bitmask & (1 << version));
version_bitmask &= ~(1 << version);
}
assert(0 == version_bitmask);
lsquic_mm_put_packet_in(&mm, packet_in);
lsquic_mm_cleanup(&mm);
}
static void
run_gvnt (int i)
{
const struct gen_ver_nego_test *const gvnt = &tests[i];
lsquic_cid_t scid, dcid;
int len;
memset(&dcid, 0, sizeof(dcid));
dcid.len = sizeof(gvnt->gvnt_cid);
memcpy(dcid.idbuf, &gvnt->gvnt_cid, sizeof(gvnt->gvnt_cid));
unsigned char out[0x40];
assert(sizeof(out) <= sizeof(gvnt->gvnt_buf)); /* Internal sanity check */
if ((1 << gvnt->gvnt_gen_ver) & LSQUIC_GQUIC_HEADER_VERSIONS)
len = lsquic_gquic_gen_ver_nego_pkt(out, gvnt->gvnt_bufsz, &dcid,
gvnt->gvnt_versions);
else
{
/* XXX this is never executed, as there is no test case for this */
scid = (lsquic_cid_t) { .len = 0, };
len = lsquic_Q046_gen_ver_nego_pkt(out, gvnt->gvnt_bufsz, &dcid,
&scid, gvnt->gvnt_versions, ((unsigned char) rand()) & 0xF);
}
assert(("Packet length is correct", len == gvnt->gvnt_len));
if (gvnt->gvnt_len > 0)
{
if ((1 << gvnt->gvnt_gen_ver) & LSQUIC_GQUIC_HEADER_VERSIONS)
assert(("Packet contents are correct",
0 == memcmp(out, gvnt->gvnt_buf, gvnt->gvnt_len)));
else
{
assert(("Packet contents are correct",
0 == memcmp(out + 1, gvnt->gvnt_buf + 1, gvnt->gvnt_len - 1)));
assert(out[0] & 0x80); /* Other 7 bits are random */
}
test_parsing_ver_nego(gvnt);
}
}
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int
main (void)
{
unsigned i;
for (i = 0; i < sizeof(tests) / sizeof(tests[0]); ++i)
run_gvnt(i);
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return 0;
}