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litespeed-quic/src/liblsquic/lsquic_trans_params.c

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/* Copyright (c) 2017 - 2022 LiteSpeed Technologies Inc. See LICENSE. */
/*
* lsquic_trans_params.c
*/
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#ifndef WIN32
#include <arpa/inet.h>
#include <sys/socket.h>
#else
#include "vc_compat.h"
#include "Ws2tcpip.h"
#endif
#include "lsquic.h"
#include "lsquic_byteswap.h"
#include "lsquic_int_types.h"
#include "lsquic_types.h"
#include "lsquic_version.h"
#include "lsquic_sizes.h"
#include "lsquic_trans_params.h"
#include "lsquic_util.h"
#include "lsquic_varint.h"
#define LSQUIC_LOGGER_MODULE LSQLM_TRAPA
#include "lsquic_logger.h"
static enum transport_param_id
tpi_val_2_enum (uint64_t tpi_val)
{
switch (tpi_val)
{
case 0: return TPI_ORIGINAL_DEST_CID;
case 1: return TPI_MAX_IDLE_TIMEOUT;
case 2: return TPI_STATELESS_RESET_TOKEN;
case 3: return TPI_MAX_UDP_PAYLOAD_SIZE;
case 4: return TPI_INIT_MAX_DATA;
case 5: return TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL;
case 6: return TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE;
case 7: return TPI_INIT_MAX_STREAM_DATA_UNI;
case 8: return TPI_INIT_MAX_STREAMS_BIDI;
case 9: return TPI_INIT_MAX_STREAMS_UNI;
case 10: return TPI_ACK_DELAY_EXPONENT;
case 11: return TPI_MAX_ACK_DELAY;
case 12: return TPI_DISABLE_ACTIVE_MIGRATION;
case 13: return TPI_PREFERRED_ADDRESS;
case 14: return TPI_ACTIVE_CONNECTION_ID_LIMIT;
case 15: return TPI_INITIAL_SOURCE_CID;
case 16: return TPI_RETRY_SOURCE_CID;
case 17: return TPI_VERSION_INFORMATION;
case 0x20: return TPI_MAX_DATAGRAM_FRAME_SIZE;
#if LSQUIC_TEST_QUANTUM_READINESS
case 0xC37: return TPI_QUANTUM_READINESS;
#endif
case 0x1057: return TPI_LOSS_BITS;
case 0x2AB2: return TPI_GREASE_QUIC_BIT;
case 0xDE1A: return TPI_MIN_ACK_DELAY;
case 0xFF02DE1A:return TPI_MIN_ACK_DELAY_02;
case 0x7158: return TPI_TIMESTAMPS;
default: return INT_MAX;
}
}
static const unsigned enum_2_tpi_val[LAST_TPI + 1] =
{
[TPI_ORIGINAL_DEST_CID] = 0x0,
[TPI_MAX_IDLE_TIMEOUT] = 0x1,
[TPI_STATELESS_RESET_TOKEN] = 0x2,
[TPI_MAX_UDP_PAYLOAD_SIZE] = 0x3,
[TPI_INIT_MAX_DATA] = 0x4,
[TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL] = 0x5,
[TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE] = 0x6,
[TPI_INIT_MAX_STREAM_DATA_UNI] = 0x7,
[TPI_INIT_MAX_STREAMS_BIDI] = 0x8,
[TPI_INIT_MAX_STREAMS_UNI] = 0x9,
[TPI_ACK_DELAY_EXPONENT] = 0xA,
[TPI_MAX_ACK_DELAY] = 0xB,
[TPI_DISABLE_ACTIVE_MIGRATION] = 0xC,
[TPI_PREFERRED_ADDRESS] = 0xD,
[TPI_ACTIVE_CONNECTION_ID_LIMIT] = 0xE,
[TPI_INITIAL_SOURCE_CID] = 0xF,
[TPI_RETRY_SOURCE_CID] = 0x10,
[TPI_VERSION_INFORMATION] = 0x11,
[TPI_MAX_DATAGRAM_FRAME_SIZE] = 0x20,
#if LSQUIC_TEST_QUANTUM_READINESS
[TPI_QUANTUM_READINESS] = 0xC37,
#endif
[TPI_LOSS_BITS] = 0x1057,
[TPI_MIN_ACK_DELAY] = 0xDE1A,
[TPI_MIN_ACK_DELAY_02] = 0xFF02DE1A,
[TPI_TIMESTAMPS] = 0x7158,
[TPI_GREASE_QUIC_BIT] = 0x2AB2,
};
const char * const lsquic_tpi2str[LAST_TPI + 1] =
{
[TPI_ORIGINAL_DEST_CID] = "original_destination_connection_id",
[TPI_MAX_IDLE_TIMEOUT] = "max_idle_timeout",
[TPI_STATELESS_RESET_TOKEN] = "stateless_reset_token",
[TPI_MAX_UDP_PAYLOAD_SIZE] = "max_udp_payload_size",
[TPI_INIT_MAX_DATA] = "init_max_data",
[TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL] = "init_max_stream_data_bidi_local",
[TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE] = "init_max_stream_data_bidi_remote",
[TPI_INIT_MAX_STREAM_DATA_UNI] = "init_max_stream_data_uni",
[TPI_INIT_MAX_STREAMS_BIDI] = "init_max_streams_bidi",
[TPI_INIT_MAX_STREAMS_UNI] = "init_max_streams_uni",
[TPI_ACK_DELAY_EXPONENT] = "ack_delay_exponent",
[TPI_MAX_ACK_DELAY] = "max_ack_delay",
[TPI_DISABLE_ACTIVE_MIGRATION] = "disable_active_migration",
[TPI_PREFERRED_ADDRESS] = "preferred_address",
[TPI_ACTIVE_CONNECTION_ID_LIMIT] = "active_connection_id_limit",
[TPI_INITIAL_SOURCE_CID] = "initial_source_connection_id",
[TPI_RETRY_SOURCE_CID] = "retry_source_connection_id",
[TPI_MAX_DATAGRAM_FRAME_SIZE] = "max_datagram_frame_size",
#if LSQUIC_TEST_QUANTUM_READINESS
[TPI_QUANTUM_READINESS] = "quantum_readiness",
#endif
[TPI_LOSS_BITS] = "loss_bits",
[TPI_MIN_ACK_DELAY] = "min_ack_delay",
[TPI_MIN_ACK_DELAY_02] = "min_ack_delay_02",
[TPI_TIMESTAMPS] = "timestamps",
[TPI_GREASE_QUIC_BIT] = "grease_quic_bit",
};
#define tpi2str lsquic_tpi2str
static const uint64_t def_vals[MAX_NUM_WITH_DEF_TPI + 1] =
{
[TPI_MAX_UDP_PAYLOAD_SIZE] = TP_DEF_MAX_UDP_PAYLOAD_SIZE,
[TPI_ACK_DELAY_EXPONENT] = TP_DEF_ACK_DELAY_EXP,
[TPI_INIT_MAX_STREAMS_UNI] = TP_DEF_INIT_MAX_STREAMS_UNI,
[TPI_INIT_MAX_STREAMS_BIDI] = TP_DEF_INIT_MAX_STREAMS_BIDI,
[TPI_INIT_MAX_DATA] = TP_DEF_INIT_MAX_DATA,
[TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL] = TP_DEF_INIT_MAX_STREAM_DATA_BIDI_LOCAL,
[TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE] = TP_DEF_INIT_MAX_STREAM_DATA_BIDI_REMOTE,
[TPI_INIT_MAX_STREAM_DATA_UNI] = TP_DEF_INIT_MAX_STREAM_DATA_UNI,
[TPI_MAX_IDLE_TIMEOUT] = TP_DEF_MAX_IDLE_TIMEOUT,
[TPI_MAX_ACK_DELAY] = TP_DEF_MAX_ACK_DELAY,
[TPI_ACTIVE_CONNECTION_ID_LIMIT] = TP_DEF_ACTIVE_CONNECTION_ID_LIMIT,
};
static const uint64_t max_vals[MAX_NUMERIC_TPI + 1] =
{
/* We don't enforce the maximum practical UDP payload value of 65527, as
* it is not required by the spec and is not necessary.
*/
[TPI_MAX_UDP_PAYLOAD_SIZE] = VINT_MAX_VALUE,
[TPI_ACK_DELAY_EXPONENT] = TP_MAX_ACK_DELAY_EXP,
[TPI_INIT_MAX_STREAMS_UNI] = 1ull << 60,
[TPI_INIT_MAX_STREAMS_BIDI] = 1ull << 60,
[TPI_INIT_MAX_DATA] = VINT_MAX_VALUE,
[TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL] = VINT_MAX_VALUE,
[TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE] = VINT_MAX_VALUE,
[TPI_INIT_MAX_STREAM_DATA_UNI] = VINT_MAX_VALUE,
[TPI_MAX_IDLE_TIMEOUT] = VINT_MAX_VALUE,
[TPI_MAX_ACK_DELAY] = TP_MAX_MAX_ACK_DELAY,
[TPI_ACTIVE_CONNECTION_ID_LIMIT] = VINT_MAX_VALUE,
[TPI_LOSS_BITS] = 1,
[TPI_MIN_ACK_DELAY] = (1u << 24) - 1u,
[TPI_MIN_ACK_DELAY_02] = (1u << 24) - 1u,
[TPI_TIMESTAMPS] = TS_WANT_THEM|TS_GENERATE_THEM,
[TPI_MAX_DATAGRAM_FRAME_SIZE] = VINT_MAX_VALUE,
};
static const uint64_t min_vals[MAX_NUMERIC_TPI + 1] =
{
/* On the other hand, we do enforce the lower bound. */
[TPI_MAX_UDP_PAYLOAD_SIZE] = 1200,
[TPI_MIN_ACK_DELAY] = 1,
[TPI_MIN_ACK_DELAY_02] = 1,
[TPI_ACTIVE_CONNECTION_ID_LIMIT] = 2,
[TPI_TIMESTAMPS] = TS_WANT_THEM,
};
static size_t
preferred_address_size (const struct transport_params *params)
{
return sizeof(params->tp_preferred_address.ipv4_addr)
+ sizeof(params->tp_preferred_address.ipv4_port)
+ sizeof(params->tp_preferred_address.ipv6_addr)
+ sizeof(params->tp_preferred_address.ipv6_port)
+ 1 + params->tp_preferred_address.cid.len
+ sizeof(params->tp_preferred_address.srst)
;
}
int
lsquic_tp_has_pref_ipv4 (const struct transport_params *params)
{
return (params->tp_set & (1 << TPI_PREFERRED_ADDRESS))
&& params->tp_preferred_address.ipv4_port
&& !lsquic_is_zero(params->tp_preferred_address.ipv4_addr,
sizeof(params->tp_preferred_address.ipv4_addr));
}
int
lsquic_tp_has_pref_ipv6 (const struct transport_params *params)
{
return (params->tp_set & (1 << TPI_PREFERRED_ADDRESS))
&& params->tp_preferred_address.ipv6_port
&& !lsquic_is_zero(params->tp_preferred_address.ipv6_addr,
sizeof(params->tp_preferred_address.ipv6_addr));
}
#if LSQUIC_TEST_QUANTUM_READINESS
#include <stdlib.h>
size_t
lsquic_tp_get_quantum_sz (void)
{
const char *str;
str = getenv("LSQUIC_QUANTUM_SZ");
if (str)
return atoi(str);
else
/* https://github.com/quicwg/base-drafts/wiki/Quantum-Readiness-test */
return 1200;
}
#endif
static size_t
update_cid_bits (unsigned bits[][3], enum transport_param_id tpi,
const lsquic_cid_t *cid)
{
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
#if __GNUC__
#pragma GCC diagnostic ignored "-Wunknown-pragmas"
#if __clang__
#pragma GCC diagnostic ignored "-Wtautological-constant-out-of-range-compare"
#else
#pragma GCC diagnostic ignored "-Wtype-limits"
#endif
#endif
bits[tpi][1] = vint_val2bits(cid->len);
#if __GNUC__
#pragma GCC diagnostic pop
#pragma GCC diagnostic pop
#endif
return (1u << bits[tpi][0]) + (1u << bits[tpi][1]) + cid->len;
}
int
lsquic_tp_encode (const struct transport_params *params, int is_server,
unsigned char *const buf, size_t bufsz)
{
unsigned char *p;
size_t need;
uint16_t u16;
enum transport_param_id tpi;
unsigned set;
unsigned bits[LAST_TPI + 1][3 /* ID, length, value */];
#if LSQUIC_TEST_QUANTUM_READINESS
const size_t quantum_sz = lsquic_tp_get_quantum_sz();
#endif
lsquic_ver_tag_t tag;
int i;
need = 0;
set = params->tp_set; /* Will turn bits off for default values */
if (set & (1 << TPI_INITIAL_SOURCE_CID))
need += update_cid_bits(bits, TPI_INITIAL_SOURCE_CID,
&params->tp_initial_source_cid);
if (is_server)
{
if (set & (1 << TPI_ORIGINAL_DEST_CID))
need += update_cid_bits(bits, TPI_ORIGINAL_DEST_CID,
&params->tp_original_dest_cid);
if (set & (1 << TPI_RETRY_SOURCE_CID))
need += update_cid_bits(bits, TPI_RETRY_SOURCE_CID,
&params->tp_retry_source_cid);
if (set & (1 << TPI_STATELESS_RESET_TOKEN))
{
bits[TPI_STATELESS_RESET_TOKEN][0]
= vint_val2bits(enum_2_tpi_val[TPI_STATELESS_RESET_TOKEN]);
bits[TPI_STATELESS_RESET_TOKEN][1]
= vint_val2bits(sizeof(params->tp_stateless_reset_token));
need += (1 << bits[TPI_STATELESS_RESET_TOKEN][0])
+ (1 << bits[TPI_STATELESS_RESET_TOKEN][1])
+ sizeof(params->tp_stateless_reset_token);
}
if (set & (1 << TPI_PREFERRED_ADDRESS))
{
bits[TPI_PREFERRED_ADDRESS][0]
= vint_val2bits(enum_2_tpi_val[TPI_PREFERRED_ADDRESS]);
bits[TPI_PREFERRED_ADDRESS][1] = vint_val2bits(
preferred_address_size(params));
need += (1 << bits[TPI_PREFERRED_ADDRESS][0])
+ (1 << bits[TPI_PREFERRED_ADDRESS][1])
+ preferred_address_size(params);
}
}
#if LSQUIC_TEST_QUANTUM_READINESS
if (set & (1 << TPI_QUANTUM_READINESS))
{
bits[TPI_QUANTUM_READINESS][0]
= vint_val2bits(enum_2_tpi_val[TPI_QUANTUM_READINESS]);
bits[TPI_QUANTUM_READINESS][1] = vint_val2bits(quantum_sz);
need += (1 << bits[TPI_QUANTUM_READINESS][0])
+ (1 << bits[TPI_QUANTUM_READINESS][1])
+ quantum_sz;
}
#endif
for (tpi = 0; tpi <= MAX_NUMERIC_TPI; ++tpi)
if (set & (1 << tpi))
{
if (tpi > MAX_NUM_WITH_DEF_TPI
|| params->tp_numerics[tpi] != def_vals[tpi])
{
if (params->tp_numerics[tpi] >= min_vals[tpi]
&& params->tp_numerics[tpi] <= max_vals[tpi])
{
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
bits[tpi][2] = vint_val2bits(params->tp_numerics[tpi]);
bits[tpi][1] = vint_val2bits(bits[tpi][2]);
need += (1 << bits[tpi][0])
+ (1 << bits[tpi][1])
+ (1 << bits[tpi][2]);
}
else if (params->tp_numerics[tpi] > max_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too large (%"PRIu64" vs "
"maximum of %"PRIu64")", tpi2str[tpi],
params->tp_numerics[tpi], max_vals[tpi]);
return -1;
}
else
{
LSQ_DEBUG("numeric value of %s is too small (%"PRIu64" vs "
"minimum " "of %"PRIu64")",
tpi2str[tpi], params->tp_numerics[tpi], min_vals[tpi]);
return -1;
}
}
else
set &= ~(1 << tpi); /* Don't write default value */
}
for (; tpi <= MAX_EMPTY_TPI; ++tpi)
if (set & (1 << tpi))
{
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
need += (1 << bits[tpi][0]) + 1 /* Zero length byte */;
}
if (set & (1 << TPI_VERSION_INFORMATION))
{
tpi = TPI_VERSION_INFORMATION;
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
bits[tpi][1] = vint_val2bits(params->tp_version_cnt << 2);
need += (1 << bits[tpi][0])
+ (1 << bits[tpi][1])
+ (params->tp_version_cnt << 2);
}
if (need > bufsz || need > UINT16_MAX)
{
errno = ENOBUFS;
return -1;
}
p = buf;
#define WRITE_TO_P(src, len) do { \
memcpy(p, src, len); \
p += len; \
} while (0)
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define WRITE_UINT_TO_P(val, width) do { \
u##width = bswap_##width(val); \
WRITE_TO_P(&u##width, sizeof(u##width)); \
} while (0)
#else
#define WRITE_UINT_TO_P(val, width) do { \
u##width = val; \
WRITE_TO_P(&u##width, sizeof(u##width)); \
} while (0)
#endif
for (tpi = 0; tpi <= LAST_TPI; ++tpi)
if (set & (1 << tpi))
{
vint_write(p, enum_2_tpi_val[tpi], bits[tpi][0],
1 << bits[tpi][0]);
p += 1 << bits[tpi][0];
switch (tpi)
{
case TPI_MAX_IDLE_TIMEOUT:
case TPI_MAX_UDP_PAYLOAD_SIZE:
case TPI_INIT_MAX_DATA:
case TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL:
case TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE:
case TPI_INIT_MAX_STREAM_DATA_UNI:
case TPI_INIT_MAX_STREAMS_BIDI:
case TPI_INIT_MAX_STREAMS_UNI:
case TPI_ACK_DELAY_EXPONENT:
case TPI_MAX_ACK_DELAY:
case TPI_ACTIVE_CONNECTION_ID_LIMIT:
case TPI_LOSS_BITS:
case TPI_MIN_ACK_DELAY:
case TPI_MIN_ACK_DELAY_02:
case TPI_TIMESTAMPS:
case TPI_MAX_DATAGRAM_FRAME_SIZE:
vint_write(p, 1 << bits[tpi][2], bits[tpi][1],
1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
vint_write(p, params->tp_numerics[tpi], bits[tpi][2],
1 << bits[tpi][2]);
p += 1 << bits[tpi][2];
break;
case TPI_ORIGINAL_DEST_CID:
case TPI_INITIAL_SOURCE_CID:
case TPI_RETRY_SOURCE_CID:
vint_write(p, params->tp_cids[TP_CID_IDX(tpi)].len, bits[tpi][1],
1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(params->tp_cids[TP_CID_IDX(tpi)].idbuf,
params->tp_cids[TP_CID_IDX(tpi)].len);
break;
case TPI_STATELESS_RESET_TOKEN:
vint_write(p, sizeof(params->tp_stateless_reset_token),
bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(params->tp_stateless_reset_token,
sizeof(params->tp_stateless_reset_token));
break;
case TPI_PREFERRED_ADDRESS:
vint_write(p, preferred_address_size(params),
bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(&params->tp_preferred_address.ipv4_addr,
sizeof(params->tp_preferred_address.ipv4_addr));
WRITE_UINT_TO_P(params->tp_preferred_address.ipv4_port, 16);
WRITE_TO_P(&params->tp_preferred_address.ipv6_addr,
sizeof(params->tp_preferred_address.ipv6_addr));
WRITE_UINT_TO_P(params->tp_preferred_address.ipv6_port, 16);
*p++ = params->tp_preferred_address.cid.len;
WRITE_TO_P(params->tp_preferred_address.cid.idbuf,
params->tp_preferred_address.cid.len);
WRITE_TO_P(params->tp_preferred_address.srst,
sizeof(params->tp_preferred_address.srst));
break;
case TPI_DISABLE_ACTIVE_MIGRATION:
case TPI_GREASE_QUIC_BIT:
*p++ = 0;
break;
#if LSQUIC_TEST_QUANTUM_READINESS
case TPI_QUANTUM_READINESS:
LSQ_DEBUG("encoded %zd bytes of quantum readiness", quantum_sz);
vint_write(p, quantum_sz, bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
memset(p, 'Q', quantum_sz);
p += quantum_sz;
break;
#endif
case TPI_VERSION_INFORMATION:
//FIXME: generate supported version info.
vint_write(p, params->tp_version_cnt << 2,
bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
for(i = 0; i < params->tp_version_cnt; ++i)
{
tag = lsquic_ver2tag(params->tp_version_info[i]);
WRITE_TO_P(&tag, 4);
}
break;
}
}
assert(buf + need == p);
return (int) (p - buf);
#undef WRITE_TO_P
#undef WRITE_UINT_TO_P
}
int
lsquic_tp_decode (const unsigned char *const buf, size_t bufsz,
int is_server,
struct transport_params *params)
{
const unsigned char *p, *end, *q;
uint64_t len, param_id;
uint16_t tlen;
enum transport_param_id tpi;
unsigned set_of_ids;
int s;
lsquic_ver_tag_t tag;
p = buf;
end = buf + bufsz;
*params = TP_INITIALIZER();
#define EXPECT_LEN(expected_len) do { \
if (expected_len != len) \
return -1; \
} while (0)
#define EXPECT_AT_LEAST(expected_len) do { \
if ((expected_len) > (uintptr_t) (p + len - q)) \
return -1; \
} while (0)
set_of_ids = 0;
while (p < end)
{
s = vint_read(p, end, &param_id);
if (s < 0)
return -1;
LSQ_DEBUG("read TP 0x%"PRIX64, param_id);
p += s;
s = vint_read(p, end, &len);
if (s < 0)
return -1;
p += s;
if ((ptrdiff_t) len > end - p)
return -1;
tpi = tpi_val_2_enum(param_id);
if (tpi <= LAST_TPI)
{
if (set_of_ids & (1 << tpi))
return -1;
set_of_ids |= 1 << tpi;
}
switch (tpi)
{
case TPI_MAX_IDLE_TIMEOUT:
case TPI_MAX_UDP_PAYLOAD_SIZE:
case TPI_INIT_MAX_DATA:
case TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL:
case TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE:
case TPI_INIT_MAX_STREAM_DATA_UNI:
case TPI_INIT_MAX_STREAMS_BIDI:
case TPI_INIT_MAX_STREAMS_UNI:
case TPI_ACK_DELAY_EXPONENT:
case TPI_MAX_ACK_DELAY:
case TPI_ACTIVE_CONNECTION_ID_LIMIT:
case TPI_LOSS_BITS:
case TPI_MIN_ACK_DELAY:
case TPI_MIN_ACK_DELAY_02:
case TPI_TIMESTAMPS:
case TPI_MAX_DATAGRAM_FRAME_SIZE:
switch (len)
{
case 1:
case 2:
case 4:
case 8:
s = vint_read(p, p + len, &params->tp_numerics[tpi]);
if (s == (int) len)
{
if (params->tp_numerics[tpi] > max_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too large "
"(%"PRIu64" vs maximum of %"PRIu64, tpi2str[tpi],
params->tp_numerics[tpi], max_vals[tpi]);
return -1;
}
else if (params->tp_numerics[tpi] < min_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too small "
"(%"PRIu64" vs minimum of %"PRIu64, tpi2str[tpi],
params->tp_numerics[tpi], min_vals[tpi]);
return -1;
}
break;
}
else
{
LSQ_DEBUG("cannot read the value of numeric transport "
"param %s of length %"PRIu64, tpi2str[tpi], len);
return -1;
}
default:
LSQ_DEBUG("invalid length=%"PRIu64" for numeric transport "
"parameter %s", len, tpi2str[tpi]);
return -1;
}
break;
case TPI_DISABLE_ACTIVE_MIGRATION:
case TPI_GREASE_QUIC_BIT:
EXPECT_LEN(0);
break;
case TPI_STATELESS_RESET_TOKEN:
/* Client MUST not include reset token,
* see [draft-ietf-quic-transport-11], Section 6.4.1
*/
if (!is_server)
return -1;
EXPECT_LEN(sizeof(params->tp_stateless_reset_token));
memcpy(params->tp_stateless_reset_token, p,
sizeof(params->tp_stateless_reset_token));
break;
case TPI_ORIGINAL_DEST_CID:
case TPI_RETRY_SOURCE_CID:
/* [draft-ietf-quic-transport-28] Section 18.2:
" A client MUST NOT include any server-only transport parameter:
" original_destination_connection_id, preferred_address,
" retry_source_connection_id, or stateless_reset_token.
*/
if (!is_server)
return -1;
/* fallthru */
case TPI_INITIAL_SOURCE_CID:
if (len > MAX_CID_LEN)
return -1;
memcpy(params->tp_cids[TP_CID_IDX(tpi)].idbuf, p, len);
params->tp_cids[TP_CID_IDX(tpi)].len = len;
break;
case TPI_PREFERRED_ADDRESS:
/* Client MUST not include preferred address,
* see [draft-ietf-quic-transport-12], Section 6.4.1
*/
if (!is_server)
return -1;
q = p;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv4_addr));
memcpy(params->tp_preferred_address.ipv4_addr, q,
sizeof(params->tp_preferred_address.ipv4_addr));
q += sizeof(params->tp_preferred_address.ipv4_addr);
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv4_port));
READ_UINT(params->tp_preferred_address.ipv4_port, 16, q, 2);
q += 2;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv6_addr));
memcpy(params->tp_preferred_address.ipv6_addr, q,
sizeof(params->tp_preferred_address.ipv6_addr));
q += sizeof(params->tp_preferred_address.ipv6_addr);
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv6_port));
READ_UINT(params->tp_preferred_address.ipv6_port, 16, q, 2);
q += 2;
EXPECT_AT_LEAST(1);
tlen = *q;
q += 1;
if (tlen > MAX_CID_LEN)
{
LSQ_DEBUG("preferred server address contains invalid "
"CID length of %"PRIu16" bytes", tlen);
return -1;
}
EXPECT_AT_LEAST(tlen);
memcpy(params->tp_preferred_address.cid.idbuf, q, tlen);
params->tp_preferred_address.cid.len = tlen;
q += tlen;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.srst));
memcpy(params->tp_preferred_address.srst, q,
sizeof(params->tp_preferred_address.srst));
q += sizeof(params->tp_preferred_address.srst);
if (q != p + len)
return -1;
break;
case TPI_VERSION_INFORMATION:
if (len & 0x3)
return -1;
q = p;
while(q < p + len)
{
memmove(&tag, q, 4);
if (tag == 0)
return -1;
int ver = lsquic_tag2ver(tag);
if (ver != -1)
{
if (params->tp_version_cnt > 0)
params->tp_versions |= 1 << ver;
if (params->tp_version_cnt < sizeof(params->tp_version_info))
params->tp_version_info[params->tp_version_cnt++] = ver;
}
else if (params->tp_version_cnt == 0)
return -1;
q += 4;
}
if (!is_server && (params->tp_versions
& (1 << params->tp_chosen_version)) == 0)
return -1;
break;
default:
/* Do nothing: skip this transport parameter */
break;
}
p += len;
if (tpi <= LAST_TPI)
{
params->tp_set |= 1 << tpi;
params->tp_decoded |= 1 << tpi;
}
}
if (p != end)
return -1;
if ((params->tp_set & (1 << TPI_MIN_ACK_DELAY))
&& params->tp_numerics[TPI_MIN_ACK_DELAY]
> params->tp_numerics[TPI_MAX_ACK_DELAY] * 1000)
{
LSQ_DEBUG("min_ack_delay (%"PRIu64" usec) is larger than "
"max_ack_delay (%"PRIu64" ms)",
params->tp_numerics[TPI_MIN_ACK_DELAY],
params->tp_numerics[TPI_MAX_ACK_DELAY]);
return -1;
}
if ((params->tp_set & (1 << TPI_MIN_ACK_DELAY_02))
&& params->tp_numerics[TPI_MIN_ACK_DELAY_02]
> params->tp_numerics[TPI_MAX_ACK_DELAY] * 1000)
{
LSQ_DEBUG("min_ack_delay_02 (%"PRIu64" usec) is larger than "
"max_ack_delay (%"PRIu64" ms)",
params->tp_numerics[TPI_MIN_ACK_DELAY_02],
params->tp_numerics[TPI_MAX_ACK_DELAY]);
return -1;
}
return (int) (end - buf);
#undef EXPECT_LEN
}
void
lsquic_tp_to_str (const struct transport_params *params, char *buf, size_t sz)
{
char *const end = buf + sz;
int nw;
enum transport_param_id tpi;
char tok_str[sizeof(params->tp_stateless_reset_token) * 2 + 1];
char addr_str[INET6_ADDRSTRLEN];
int i;
for (tpi = 0; tpi <= MAX_NUMERIC_TPI; ++tpi)
if (params->tp_set & (1 << tpi))
{
nw = snprintf(buf, end - buf, "%.*s%s: %"PRIu64,
(buf + sz > end) << 1, "; ", tpi2str[tpi],
params->tp_numerics[tpi]);
buf += nw;
if (buf >= end)
return;
}
for (; tpi <= MAX_EMPTY_TPI; ++tpi)
if (params->tp_set & (1 << tpi))
{
nw = snprintf(buf, end - buf, "%.*s%s",
(buf + sz > end) << 1, "; ", tpi2str[tpi]);
buf += nw;
if (buf >= end)
return;
}
#if LSQUIC_TEST_QUANTUM_READINESS
if (params->tp_set & (1 << TPI_QUANTUM_READINESS))
{
nw = snprintf(buf, end - buf, "%.*s%s",
(buf + sz > end) << 1, "; ", tpi2str[TPI_QUANTUM_READINESS]);
buf += nw;
if (buf >= end)
return;
}
#endif
if (params->tp_set & (1 << TPI_STATELESS_RESET_TOKEN))
{
lsquic_hexstr(params->tp_stateless_reset_token,
sizeof(params->tp_stateless_reset_token), tok_str, sizeof(tok_str));
nw = snprintf(buf, end - buf, "; stateless_reset_token: %s", tok_str);
buf += nw;
if (buf >= end)
return;
}
for (tpi = FIRST_TP_CID; tpi <= LAST_TP_CID; ++tpi)
if (params->tp_set & (1 << tpi))
{
char cidbuf_[MAX_CID_LEN * 2 + 1];
nw = snprintf(buf, end - buf, "; %s: %"CID_FMT, tpi2str[tpi],
CID_BITS(&params->tp_cids[TP_CID_IDX(tpi)]));
buf += nw;
if (buf >= end)
return;
}
if (lsquic_tp_has_pref_ipv4(params))
{
if (inet_ntop(AF_INET, params->tp_preferred_address.ipv4_addr,
addr_str, sizeof(addr_str)))
{
nw = snprintf(buf, end - buf, "; IPv4 preferred address: %s:%u",
addr_str, params->tp_preferred_address.ipv4_port);
buf += nw;
if (buf >= end)
return;
}
}
if (lsquic_tp_has_pref_ipv6(params))
{
if (inet_ntop(AF_INET6, params->tp_preferred_address.ipv6_addr,
addr_str, sizeof(addr_str)))
{
nw = snprintf(buf, end - buf, "; IPv6 preferred address: %s:%u",
addr_str, params->tp_preferred_address.ipv6_port);
buf += nw;
if (buf >= end)
return;
}
}
if (params->tp_set & (1 << TPI_VERSION_INFORMATION))
{
nw = snprintf(buf, end - buf, "; version information: chosen: %s, available:",
lsquic_ver2str[params->tp_chosen_version]);
buf += nw;
if (buf >= end)
return;
for(i = 1; i < params->tp_version_cnt; ++i)
{
nw = snprintf(buf, end - buf, " %s",
lsquic_ver2str[params->tp_version_info[i]]);
buf += nw;
if (buf >= end)
return;
}
}
}
int
lsquic_tp_encode_27 (const struct transport_params *params, int is_server,
unsigned char *const buf, size_t bufsz)
{
unsigned char *p;
size_t need;
uint16_t u16;
enum transport_param_id tpi;
unsigned set;
unsigned bits[LAST_TPI + 1][3 /* ID, length, value */];
#if LSQUIC_TEST_QUANTUM_READINESS
const size_t quantum_sz = lsquic_tp_get_quantum_sz();
#endif
need = 0;
set = params->tp_set; /* Will turn bits off for default values */
if (is_server)
{
if (set & (1 << TPI_ORIGINAL_DEST_CID))
{
bits[TPI_ORIGINAL_DEST_CID][0]
= vint_val2bits(enum_2_tpi_val[TPI_ORIGINAL_DEST_CID]);
#if __GNUC__
#pragma GCC diagnostic ignored "-Wunknown-pragmas"
#if __clang__
#pragma GCC diagnostic ignored "-Wtautological-constant-out-of-range-compare"
#else
#pragma GCC diagnostic ignored "-Wtype-limits"
#endif
#endif
bits[TPI_ORIGINAL_DEST_CID][1]
= vint_val2bits(params->tp_original_dest_cid.len);
#if __GNUC__
#pragma GCC diagnostic pop
#pragma GCC diagnostic pop
#endif
need += (1 << bits[TPI_ORIGINAL_DEST_CID][0])
+ (1 << bits[TPI_ORIGINAL_DEST_CID][1])
+ params->tp_original_dest_cid.len;
}
if (set & (1 << TPI_STATELESS_RESET_TOKEN))
{
bits[TPI_STATELESS_RESET_TOKEN][0]
= vint_val2bits(enum_2_tpi_val[TPI_STATELESS_RESET_TOKEN]);
bits[TPI_STATELESS_RESET_TOKEN][1]
= vint_val2bits(sizeof(params->tp_stateless_reset_token));
need += (1 << bits[TPI_STATELESS_RESET_TOKEN][0])
+ (1 << bits[TPI_STATELESS_RESET_TOKEN][1])
+ sizeof(params->tp_stateless_reset_token);
}
if (set & (1 << TPI_PREFERRED_ADDRESS))
{
bits[TPI_PREFERRED_ADDRESS][0]
= vint_val2bits(enum_2_tpi_val[TPI_PREFERRED_ADDRESS]);
bits[TPI_PREFERRED_ADDRESS][1] = vint_val2bits(
preferred_address_size(params));
need += (1 << bits[TPI_PREFERRED_ADDRESS][0])
+ (1 << bits[TPI_PREFERRED_ADDRESS][1])
+ preferred_address_size(params);
}
}
#if LSQUIC_TEST_QUANTUM_READINESS
else if (set & (1 << TPI_QUANTUM_READINESS))
{
bits[TPI_QUANTUM_READINESS][0]
= vint_val2bits(enum_2_tpi_val[TPI_QUANTUM_READINESS]);
bits[TPI_QUANTUM_READINESS][1] = vint_val2bits(quantum_sz);
need += (1 << bits[TPI_QUANTUM_READINESS][0])
+ (1 << bits[TPI_QUANTUM_READINESS][1])
+ quantum_sz;
}
#endif
for (tpi = 0; tpi <= MAX_NUMERIC_TPI; ++tpi)
if (set & (1 << tpi))
{
if (tpi > MAX_NUM_WITH_DEF_TPI
|| params->tp_numerics[tpi] != def_vals[tpi])
{
if (params->tp_numerics[tpi] >= min_vals[tpi]
&& params->tp_numerics[tpi] <= max_vals[tpi])
{
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
bits[tpi][2] = vint_val2bits(params->tp_numerics[tpi]);
bits[tpi][1] = vint_val2bits(bits[tpi][2]);
need += (1 << bits[tpi][0])
+ (1 << bits[tpi][1])
+ (1 << bits[tpi][2]);
}
else if (params->tp_numerics[tpi] > max_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too large (%"PRIu64" vs "
"maximum of %"PRIu64")", tpi2str[tpi],
params->tp_numerics[tpi], max_vals[tpi]);
return -1;
}
else
{
LSQ_DEBUG("numeric value of %s is too small (%"PRIu64" vs "
"minimum " "of %"PRIu64")",
tpi2str[tpi], params->tp_numerics[tpi], min_vals[tpi]);
return -1;
}
}
else
set &= ~(1 << tpi); /* Don't write default value */
}
for (; tpi <= MAX_EMPTY_TPI; ++tpi)
if (set & (1 << tpi))
{
bits[tpi][0] = vint_val2bits(enum_2_tpi_val[tpi]);
need += (1 << bits[tpi][0]) + 1 /* Zero length byte */;
}
if (need > bufsz || need > UINT16_MAX)
{
errno = ENOBUFS;
return -1;
}
p = buf;
#define WRITE_TO_P(src, len) do { \
memcpy(p, src, len); \
p += len; \
} while (0)
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define WRITE_UINT_TO_P(val, width) do { \
u##width = bswap_##width(val); \
WRITE_TO_P(&u##width, sizeof(u##width)); \
} while (0)
#else
#define WRITE_UINT_TO_P(val, width) do { \
u##width = val; \
WRITE_TO_P(&u##width, sizeof(u##width)); \
} while (0)
#endif
for (tpi = 0; tpi <= LAST_TPI; ++tpi)
if (set & (1 << tpi))
{
vint_write(p, enum_2_tpi_val[tpi], bits[tpi][0],
1 << bits[tpi][0]);
p += 1 << bits[tpi][0];
switch (tpi)
{
case TPI_MAX_IDLE_TIMEOUT:
case TPI_MAX_UDP_PAYLOAD_SIZE:
case TPI_INIT_MAX_DATA:
case TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL:
case TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE:
case TPI_INIT_MAX_STREAM_DATA_UNI:
case TPI_INIT_MAX_STREAMS_BIDI:
case TPI_INIT_MAX_STREAMS_UNI:
case TPI_ACK_DELAY_EXPONENT:
case TPI_MAX_ACK_DELAY:
case TPI_ACTIVE_CONNECTION_ID_LIMIT:
case TPI_LOSS_BITS:
case TPI_MIN_ACK_DELAY:
case TPI_MIN_ACK_DELAY_02:
case TPI_TIMESTAMPS:
case TPI_MAX_DATAGRAM_FRAME_SIZE:
vint_write(p, 1 << bits[tpi][2], bits[tpi][1],
1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
vint_write(p, params->tp_numerics[tpi], bits[tpi][2],
1 << bits[tpi][2]);
p += 1 << bits[tpi][2];
break;
case TPI_INITIAL_SOURCE_CID:
case TPI_RETRY_SOURCE_CID:
assert(0);
return -1;
case TPI_ORIGINAL_DEST_CID:
vint_write(p, params->tp_original_dest_cid.len, bits[tpi][1],
1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(params->tp_original_dest_cid.idbuf,
params->tp_original_dest_cid.len);
break;
case TPI_STATELESS_RESET_TOKEN:
vint_write(p, sizeof(params->tp_stateless_reset_token),
bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(params->tp_stateless_reset_token,
sizeof(params->tp_stateless_reset_token));
break;
case TPI_PREFERRED_ADDRESS:
vint_write(p, preferred_address_size(params),
bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
WRITE_TO_P(&params->tp_preferred_address.ipv4_addr,
sizeof(params->tp_preferred_address.ipv4_addr));
WRITE_UINT_TO_P(params->tp_preferred_address.ipv4_port, 16);
WRITE_TO_P(&params->tp_preferred_address.ipv6_addr,
sizeof(params->tp_preferred_address.ipv6_addr));
WRITE_UINT_TO_P(params->tp_preferred_address.ipv6_port, 16);
*p++ = params->tp_preferred_address.cid.len;
WRITE_TO_P(params->tp_preferred_address.cid.idbuf,
params->tp_preferred_address.cid.len);
WRITE_TO_P(params->tp_preferred_address.srst,
sizeof(params->tp_preferred_address.srst));
break;
case TPI_DISABLE_ACTIVE_MIGRATION:
case TPI_GREASE_QUIC_BIT:
*p++ = 0;
break;
#if LSQUIC_TEST_QUANTUM_READINESS
case TPI_QUANTUM_READINESS:
LSQ_DEBUG("encoded %zd bytes of quantum readiness", quantum_sz);
vint_write(p, quantum_sz, bits[tpi][1], 1 << bits[tpi][1]);
p += 1 << bits[tpi][1];
memset(p, 'Q', quantum_sz);
p += quantum_sz;
break;
#endif
case TPI_VERSION_INFORMATION:
break;
}
}
assert(buf + need == p);
return (int) (p - buf);
#undef WRITE_TO_P
#undef WRITE_UINT_TO_P
}
int
lsquic_tp_decode_27 (const unsigned char *const buf, size_t bufsz,
int is_server,
struct transport_params *params)
{
const unsigned char *p, *end, *q;
uint64_t len, param_id;
uint16_t tlen;
enum transport_param_id tpi;
unsigned set_of_ids;
int s;
p = buf;
end = buf + bufsz;
*params = TP_INITIALIZER();
#define EXPECT_LEN(expected_len) do { \
if (expected_len != len) \
return -1; \
} while (0)
#define EXPECT_AT_LEAST(expected_len) do { \
if ((expected_len) > (uintptr_t) (p + len - q)) \
return -1; \
} while (0)
set_of_ids = 0;
while (p < end)
{
s = vint_read(p, end, &param_id);
if (s < 0)
return -1;
p += s;
s = vint_read(p, end, &len);
if (s < 0)
return -1;
p += s;
if ((ptrdiff_t) len > end - p)
return -1;
tpi = tpi_val_2_enum(param_id);
if (tpi <= LAST_TPI)
{
if (set_of_ids & (1 << tpi))
return -1;
set_of_ids |= 1 << tpi;
}
switch (tpi)
{
case TPI_MAX_IDLE_TIMEOUT:
case TPI_MAX_UDP_PAYLOAD_SIZE:
case TPI_INIT_MAX_DATA:
case TPI_INIT_MAX_STREAM_DATA_BIDI_LOCAL:
case TPI_INIT_MAX_STREAM_DATA_BIDI_REMOTE:
case TPI_INIT_MAX_STREAM_DATA_UNI:
case TPI_INIT_MAX_STREAMS_BIDI:
case TPI_INIT_MAX_STREAMS_UNI:
case TPI_ACK_DELAY_EXPONENT:
case TPI_MAX_ACK_DELAY:
case TPI_ACTIVE_CONNECTION_ID_LIMIT:
case TPI_LOSS_BITS:
case TPI_MIN_ACK_DELAY:
case TPI_MIN_ACK_DELAY_02:
case TPI_TIMESTAMPS:
case TPI_MAX_DATAGRAM_FRAME_SIZE:
switch (len)
{
case 1:
case 2:
case 4:
case 8:
s = vint_read(p, p + len, &params->tp_numerics[tpi]);
if (s == (int) len)
{
if (params->tp_numerics[tpi] > max_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too large "
"(%"PRIu64" vs maximum of %"PRIu64, tpi2str[tpi],
params->tp_numerics[tpi], max_vals[tpi]);
return -1;
}
else if (params->tp_numerics[tpi] < min_vals[tpi])
{
LSQ_DEBUG("numeric value of %s is too small "
"(%"PRIu64" vs minimum of %"PRIu64, tpi2str[tpi],
params->tp_numerics[tpi], min_vals[tpi]);
return -1;
}
break;
}
else
{
LSQ_DEBUG("cannot read the value of numeric transport "
"param %s of length %"PRIu64, tpi2str[tpi], len);
return -1;
}
default:
LSQ_DEBUG("invalid length=%"PRIu64" for numeric transport "
"parameter %s", len, tpi2str[tpi]);
return -1;
}
break;
case TPI_DISABLE_ACTIVE_MIGRATION:
EXPECT_LEN(0);
break;
case TPI_STATELESS_RESET_TOKEN:
/* Client MUST not include reset token,
* see [draft-ietf-quic-transport-11], Section 6.4.1
*/
if (!is_server)
return -1;
EXPECT_LEN(sizeof(params->tp_stateless_reset_token));
memcpy(params->tp_stateless_reset_token, p,
sizeof(params->tp_stateless_reset_token));
break;
case TPI_ORIGINAL_DEST_CID:
/* Client MUST not original connecti ID,
* see [draft-ietf-quic-transport-15], Section 6.6.1
*/
if (!is_server)
return -1;
if (len > MAX_CID_LEN)
return -1;
memcpy(params->tp_original_dest_cid.idbuf, p, len);
params->tp_original_dest_cid.len = len;
break;
case TPI_PREFERRED_ADDRESS:
/* Client MUST not include preferred address,
* see [draft-ietf-quic-transport-12], Section 6.4.1
*/
if (!is_server)
return -1;
q = p;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv4_addr));
memcpy(params->tp_preferred_address.ipv4_addr, q,
sizeof(params->tp_preferred_address.ipv4_addr));
q += sizeof(params->tp_preferred_address.ipv4_addr);
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv4_port));
READ_UINT(params->tp_preferred_address.ipv4_port, 16, q, 2);
q += 2;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv6_addr));
memcpy(params->tp_preferred_address.ipv6_addr, q,
sizeof(params->tp_preferred_address.ipv6_addr));
q += sizeof(params->tp_preferred_address.ipv6_addr);
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.ipv6_port));
READ_UINT(params->tp_preferred_address.ipv6_port, 16, q, 2);
q += 2;
EXPECT_AT_LEAST(1);
tlen = *q;
q += 1;
if (tlen > MAX_CID_LEN)
{
LSQ_DEBUG("preferred server address contains invalid "
"CID length of %"PRIu16" bytes", tlen);
return -1;
}
EXPECT_AT_LEAST(tlen);
memcpy(params->tp_preferred_address.cid.idbuf, q, tlen);
params->tp_preferred_address.cid.len = tlen;
q += tlen;
EXPECT_AT_LEAST(sizeof(params->tp_preferred_address.srst));
memcpy(params->tp_preferred_address.srst, q,
sizeof(params->tp_preferred_address.srst));
q += sizeof(params->tp_preferred_address.srst);
if (q != p + len)
return -1;
break;
default:
/* Do nothing: skip this transport parameter */
break;
}
p += len;
if (tpi <= LAST_TPI)
{
params->tp_set |= 1 << tpi;
params->tp_decoded |= 1 << tpi;
}
}
if (p != end)
return -1;
if ((params->tp_set & (1 << TPI_MIN_ACK_DELAY))
&& params->tp_numerics[TPI_MIN_ACK_DELAY]
> params->tp_numerics[TPI_MAX_ACK_DELAY] * 1000)
{
LSQ_DEBUG("min_ack_delay (%"PRIu64" usec) is larger than "
"max_ack_delay (%"PRIu64" ms)",
params->tp_numerics[TPI_MIN_ACK_DELAY],
params->tp_numerics[TPI_MAX_ACK_DELAY]);
return -1;
}
if ((params->tp_set & (1 << TPI_MIN_ACK_DELAY_02))
&& params->tp_numerics[TPI_MIN_ACK_DELAY_02]
> params->tp_numerics[TPI_MAX_ACK_DELAY] * 1000)
{
LSQ_DEBUG("min_ack_delay_02 (%"PRIu64" usec) is larger than "
"max_ack_delay (%"PRIu64" ms)",
params->tp_numerics[TPI_MIN_ACK_DELAY_02],
params->tp_numerics[TPI_MAX_ACK_DELAY]);
return -1;
}
return (int) (end - buf);
#undef EXPECT_LEN
}
void
lsquic_tp_to_str_27 (const struct transport_params *params, char *buf, size_t sz)
{
char *const end = buf + sz;
int nw;
enum transport_param_id tpi;
char tok_str[sizeof(params->tp_stateless_reset_token) * 2 + 1];
char addr_str[INET6_ADDRSTRLEN];
for (tpi = 0; tpi <= MAX_NUMERIC_TPI; ++tpi)
if (params->tp_set & (1 << tpi))
{
nw = snprintf(buf, end - buf, "%.*s%s: %"PRIu64,
(buf + sz > end) << 1, "; ", tpi2str[tpi],
params->tp_numerics[tpi]);
buf += nw;
if (buf >= end)
return;
}
for (; tpi <= MAX_EMPTY_TPI; ++tpi)
if (params->tp_set & (1 << tpi))
{
nw = snprintf(buf, end - buf, "%.*s%s",
(buf + sz > end) << 1, "; ", tpi2str[tpi]);
buf += nw;
if (buf >= end)
return;
}
#if LSQUIC_TEST_QUANTUM_READINESS
if (params->tp_set & (1 << TPI_QUANTUM_READINESS))
{
nw = snprintf(buf, end - buf, "%.*s%s",
(buf + sz > end) << 1, "; ", tpi2str[TPI_QUANTUM_READINESS]);
buf += nw;
if (buf >= end)
return;
}
#endif
if (params->tp_set & (1 << TPI_STATELESS_RESET_TOKEN))
{
lsquic_hexstr(params->tp_stateless_reset_token,
sizeof(params->tp_stateless_reset_token), tok_str, sizeof(tok_str));
nw = snprintf(buf, end - buf, "; stateless_reset_token: %s", tok_str);
buf += nw;
if (buf >= end)
return;
}
if (params->tp_set & (1 << TPI_ORIGINAL_DEST_CID))
{
char cidbuf_[MAX_CID_LEN * 2 + 1];
nw = snprintf(buf, end - buf, "; original DCID (ODCID): %"CID_FMT,
CID_BITS(&params->tp_original_dest_cid));
buf += nw;
if (buf >= end)
return;
}
if (lsquic_tp_has_pref_ipv4(params))
{
if (inet_ntop(AF_INET, params->tp_preferred_address.ipv4_addr,
addr_str, sizeof(addr_str)))
{
nw = snprintf(buf, end - buf, "; IPv4 preferred address: %s:%u",
addr_str, params->tp_preferred_address.ipv4_port);
buf += nw;
if (buf >= end)
return;
}
}
if (lsquic_tp_has_pref_ipv6(params))
{
if (inet_ntop(AF_INET6, params->tp_preferred_address.ipv6_addr,
addr_str, sizeof(addr_str)))
{
nw = snprintf(buf, end - buf, "; IPv6 preferred address: %s:%u",
addr_str, params->tp_preferred_address.ipv6_port);
buf += nw;
if (buf >= end)
return;
}
}
}
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