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Release 2.16.1 

- [FEATURE] Use "no-progress timeout" after which connection is closed.
- [BUGFIX] Select new SCID when current SCID is retired.
- [BUGFIX] Don't warn about dropped Initial packet sequence gaps during
  mini/full handoff.
- [BUGFIX] Send correct conn error when HTTP/3 frame is truncated.
- [BUGFIX] Mini conn: consider amplification when deciding to return
  TICK_SEND.
- [BUGFIX] Don't double-count tag length in amplification logic.
- [BUGFIX] Don't squeeze out lone path challenges.
- [BUGFIX] Log messages dealing with scheduled packet queue squeezing.
- [BUGFIX] don't wipe current path if no path challenge responses
  come back.
- [BUGFIX] When path is reset, don't lose path_id which is used for
  logging.
- Downgrade flow control violations to info log level from warnings.
- Fix connection cap extra check, avoid checks in nested calls.
- Fix some unit tests when extra checks are enabled.
- Use ls-hpack 2.2.1.
- Turn off unconditional extra checks for IETF clients.
- Extra checks: don't verify sent size of hello packets.  Client
  changes DCID length and this check will fail.
This commit is contained in:
Dmitri Tikhonov 2020-06-09 11:55:56 -04:00
parent 6bca16f0d2
commit 8ae5ecb45e
22 changed files with 369 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
CHANGELOG
View File

@ -1,3 +1,27 @@
2020-06-09
- 2.16.1
- [FEATURE] Use "no-progress timeout" after which connection is closed.
- [BUGFIX] Select new SCID when current SCID is retired.
- [BUGFIX] Don't warn about dropped Initial packet sequence gaps during
mini/full handoff.
- [BUGFIX] Send correct conn error when HTTP/3 frame is truncated.
- [BUGFIX] Mini conn: consider amplification when deciding to return
TICK_SEND.
- [BUGFIX] Don't double-count tag length in amplification logic.
- [BUGFIX] Don't squeeze out lone path challenges.
- [BUGFIX] Log messages dealing with scheduled packet queue squeezing.
- [BUGFIX] don't wipe current path if no path challenge responses
come back.
- [BUGFIX] When path is reset, don't lose path_id which is used for
logging.
- Downgrade flow control violations to info log level from warnings.
- Fix connection cap extra check, avoid checks in nested calls.
- Fix some unit tests when extra checks are enabled.
- Use ls-hpack 2.2.1.
- Turn off unconditional extra checks for IETF clients.
- Extra checks: don't verify sent size of hello packets. Client
changes DCID length and this check will fail.
2020-06-03
- 2.16.0
- [API] Use lsxpack_header v206.

5
bin/test_common.c
View File

@ -1939,6 +1939,11 @@ set_engine_option (struct lsquic_engine_settings *settings,
settings->es_qpack_dec_max_size = atoi(val);
return 0;
}
if (0 == strncmp(name, "noprogress_timeout", 18))
{
settings->es_noprogress_timeout = atoi(val);
return 0;
}
break;
case 20:
if (0 == strncmp(name, "max_header_list_size", 20))

31
docs/apiref.rst
View File

@ -46,13 +46,13 @@ developed by the IETF. Both types are included in a single enum:
Google QUIC version Q050
.. member:: LSQVER_ID25
IETF QUIC version ID (Internet-Draft) 25
.. member:: LSQVER_ID27
IETF QUIC version ID 27
IETF QUIC version ID (Internet-Draft) 27
.. member:: LSQVER_ID28
IETF QUIC version ID 28
.. member:: N_LSQVER
@ -703,6 +703,19 @@ settings structure:
Default value is :macro:`LSQUIC_DF_MAX_UDP_PAYLOAD_SIZE_RX`
.. member:: unsigned es_noprogress_timeout
No progress timeout.
If connection does not make progress for this number of seconds, the
connection is dropped. Here, progress is defined as user streams
being written to or read from.
If this value is zero, this timeout is disabled.
Default value is :macro:`LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER` in server
mode and :macro:`LSQUIC_DF_NOPROGRESS_TIMEOUT_CLIENT` in client mode.
To initialize the settings structure to library defaults, use the following
convenience function:
@ -881,6 +894,14 @@ out of date. Please check your :file:`lsquic.h` for actual values.*
By default, incoming packet size is not limited.
.. macro:: LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER
By default, drop no-progress connections after 60 seconds on the server.
.. macro:: LSQUIC_DF_NOPROGRESS_TIMEOUT_CLIENT
By default, do not use no-progress timeout on the client.
Receiving Packets
-----------------

2
docs/conf.py
View File

@ -26,7 +26,7 @@ author = u'LiteSpeed Technologies'
# The short X.Y version
version = u'2.16'
# The full version, including alpha/beta/rc tags
release = u'2.16.0'
release = u'2.16.1'
# -- General configuration ---------------------------------------------------

22
include/lsquic.h
View File

@ -25,7 +25,7 @@ extern "C" {
#define LSQUIC_MAJOR_VERSION 2
#define LSQUIC_MINOR_VERSION 16
#define LSQUIC_PATCH_VERSION 0
#define LSQUIC_PATCH_VERSION 1
/**
* Engine flags:
@ -343,6 +343,12 @@ typedef struct ssl_ctx_st * (*lsquic_lookup_cert_f)(
/** By default, incoming packet size is not limited. */
#define LSQUIC_DF_MAX_UDP_PAYLOAD_SIZE_RX 0
/** By default, drop no-progress connections after 60 seconds on the server */
#define LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER 60
/** By default, do not use no-progress timeout on the client */
#define LSQUIC_DF_NOPROGRESS_TIMEOUT_CLIENT 0
struct lsquic_engine_settings {
/**
* This is a bit mask wherein each bit corresponds to a value in
@ -752,6 +758,20 @@ struct lsquic_engine_settings {
* Default value is @ref LSQUIC_DF_MAX_UDP_PAYLOAD_SIZE_RX
*/
unsigned short es_max_udp_payload_size_rx;
/**
* No progress timeout.
*
* If connection does not make progress for this number of seconds, the
* connection is dropped. Here, progress is defined as user streams
* being written to or read from.
*
* If this value is zero, this timeout is disabled.
*
* Default value is @ref LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER in server
* mode and @ref LSQUIC_DF_NOPROGRESS_TIMEOUT_CLIENT in client mode.
*/
unsigned es_noprogress_timeout;
};
/* Initialize `settings' to default values */

2
src/liblsquic/lsquic_cfcw.c
View File

@ -99,7 +99,7 @@ lsquic_cfcw_incr_max_recv_off (struct lsquic_cfcw *fc, uint64_t incr)
}
else
{
LSQ_WARN("flow control violation: received at offset %"PRIu64", while "
LSQ_INFO("flow control violation: received at offset %"PRIu64", while "
"flow control receive offset is %"PRIu64,
fc->cf_max_recv_off + incr, fc->cf_recv_off);
return 0;

3
src/liblsquic/lsquic_conn_public.h
View File

@ -56,12 +56,15 @@ struct lsquic_conn_public {
const struct network_path *path;
#if LSQUIC_EXTRA_CHECKS
unsigned long stream_frame_bytes;
unsigned wtp_level; /* wtp: Write To Packets */
#endif
/* "unsigned" is wide enough: these values are only used for amplification
* limit before initial path is validated.
*/
unsigned bytes_in; /* successfully processed */
unsigned bytes_out;
/* Used for no-progress timeout */
lsquic_time_t last_tick, last_prog;
};
#endif

7
src/liblsquic/lsquic_engine.c
View File

@ -295,6 +295,8 @@ lsquic_engine_init_settings (struct lsquic_engine_settings *settings,
settings->es_init_max_streams_uni
= LSQUIC_DF_INIT_MAX_STREAMS_UNI_SERVER;
settings->es_ping_period = 0;
settings->es_noprogress_timeout
= LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER;
}
else
{
@ -311,6 +313,8 @@ lsquic_engine_init_settings (struct lsquic_engine_settings *settings,
settings->es_init_max_streams_uni
= LSQUIC_DF_INIT_MAX_STREAMS_UNI_CLIENT;
settings->es_ping_period = LSQUIC_DF_PING_PERIOD;
settings->es_noprogress_timeout
= LSQUIC_DF_NOPROGRESS_TIMEOUT_CLIENT;
}
settings->es_max_streams_in = LSQUIC_DF_MAX_STREAMS_IN;
settings->es_idle_conn_to = LSQUIC_DF_IDLE_CONN_TO;
@ -601,6 +605,9 @@ lsquic_engine_new (unsigned flags,
if (!engine->pub.enp_tokgen)
return NULL;
engine->pub.enp_crand = &engine->crand;
if (engine->pub.enp_settings.es_noprogress_timeout)
engine->pub.enp_noprog_timeout
= engine->pub.enp_settings.es_noprogress_timeout * 1000000;
if (flags & ENG_SERVER)
{
engine->pr_queue = lsquic_prq_create(

2
src/liblsquic/lsquic_engine_public.h
View File

@ -66,6 +66,8 @@ struct lsquic_engine_public {
struct crand *enp_crand;
struct evp_aead_ctx_st *enp_retry_aead_ctx;
unsigned char *enp_alpn; /* May be set if not HTTP */
/* es_noprogress_timeout converted to microseconds for speed */
lsquic_time_t enp_noprog_timeout;
};
/* Put connection onto the Tickable Queue if it is not already on it. If

65
src/liblsquic/lsquic_full_conn.c
View File

@ -112,6 +112,7 @@ enum full_conn_flags {
FC_ABORT_COMPLAINED
= (1 <<23),
FC_GOT_SREJ = (1 <<24), /* Don't schedule ACK alarm */
FC_NOPROG_TIMEOUT = (1 <<25),
};
#define FC_IMMEDIATE_CLOSE_FLAGS \
@ -686,6 +687,8 @@ new_conn_common (lsquic_cid_t cid, struct lsquic_engine_public *enpub,
if (conn->fc_settings->es_support_push)
conn->fc_flags |= FC_SUPPORT_PUSH;
conn->fc_conn.cn_n_cces = sizeof(conn->fc_cces) / sizeof(conn->fc_cces[0]);
if (conn->fc_settings->es_noprogress_timeout)
conn->fc_flags |= FC_NOPROG_TIMEOUT;
return conn;
cleanup_on_error:
@ -2481,9 +2484,22 @@ idle_alarm_expired (enum alarm_id al_id, void *ctx, lsquic_time_t expiry,
lsquic_time_t now)
{
struct full_conn *conn = ctx;
LSQ_DEBUG("connection timed out");
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out");
conn->fc_flags |= FC_TIMED_OUT;
if ((conn->fc_flags & FC_NOPROG_TIMEOUT)
&& conn->fc_pub.last_prog + conn->fc_enpub->enp_noprog_timeout < now)
{
LSQ_DEBUG("connection timed out due to lack of progress");
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out due to "
"lack of progress");
/* Different flag so that CONNECTION_CLOSE frame is sent */
conn->fc_flags |= FC_ABORTED;
}
else
{
LSQ_DEBUG("connection timed out");
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out");
conn->fc_flags |= FC_TIMED_OUT;
}
}
@ -3242,6 +3258,31 @@ full_conn_ci_can_write_ack (struct lsquic_conn *lconn)
}
/* This should be called before lsquic_alarmset_ring_expired() */
static void
maybe_set_noprogress_alarm (struct full_conn *conn, lsquic_time_t now)
{
lsquic_time_t exp;
if (conn->fc_flags & FC_NOPROG_TIMEOUT)
{
if (conn->fc_pub.last_tick)
{
exp = conn->fc_pub.last_prog + conn->fc_enpub->enp_noprog_timeout;
if (!lsquic_alarmset_is_set(&conn->fc_alset, AL_IDLE)
|| exp < conn->fc_alset.as_expiry[AL_IDLE])
lsquic_alarmset_set(&conn->fc_alset, AL_IDLE, exp);
conn->fc_pub.last_tick = now;
}
else
{
conn->fc_pub.last_tick = now;
conn->fc_pub.last_prog = now;
}
}
}
static enum tick_st
full_conn_ci_tick (lsquic_conn_t *lconn, lsquic_time_t now)
{
@ -3296,6 +3337,8 @@ full_conn_ci_tick (lsquic_conn_t *lconn, lsquic_time_t now)
conn->fc_flags &= ~FC_HAVE_SAVED_ACK;
}
maybe_set_noprogress_alarm(conn, now);
lsquic_send_ctl_tick_in(&conn->fc_send_ctl, now);
lsquic_send_ctl_set_buffer_stream_packets(&conn->fc_send_ctl, 1);
CLOSE_IF_NECESSARY();
@ -3520,6 +3563,20 @@ full_conn_ci_tick (lsquic_conn_t *lconn, lsquic_time_t now)
}
static void
set_earliest_idle_alarm (struct full_conn *conn, lsquic_time_t idle_conn_to)
{
lsquic_time_t exp;
if (conn->fc_pub.last_prog
&& (assert(conn->fc_flags & FC_NOPROG_TIMEOUT),
exp = conn->fc_pub.last_prog + conn->fc_enpub->enp_noprog_timeout,
exp < idle_conn_to))
idle_conn_to = exp;
lsquic_alarmset_set(&conn->fc_alset, AL_IDLE, idle_conn_to);
}
static void
full_conn_ci_packet_in (lsquic_conn_t *lconn, lsquic_packet_in_t *packet_in)
{
@ -3528,7 +3585,7 @@ full_conn_ci_packet_in (lsquic_conn_t *lconn, lsquic_packet_in_t *packet_in)
#if LSQUIC_CONN_STATS
conn->fc_stats.in.bytes += packet_in->pi_data_sz;
#endif
lsquic_alarmset_set(&conn->fc_alset, AL_IDLE,
set_earliest_idle_alarm(conn,
packet_in->pi_received + conn->fc_settings->es_idle_conn_to);
if (0 == (conn->fc_flags & FC_ERROR))
if (0 != process_incoming_packet(conn, packet_in))

125
src/liblsquic/lsquic_full_conn_ietf.c
View File

@ -141,6 +141,7 @@ enum ifull_conn_flags
enum more_flags
{
MF_VALIDATE_PATH = 1 << 0,
MF_NOPROG_TIMEOUT = 1 << 1,
};
@ -476,6 +477,9 @@ static int
insert_new_dcid (struct ietf_full_conn *, uint64_t seqno,
const lsquic_cid_t *, const unsigned char *token, int update_cur_dcid);
static struct conn_cid_elem *
find_cce_by_cid (struct ietf_full_conn *, const lsquic_cid_t *);
static unsigned
highest_bit_set (unsigned sz)
{
@ -533,9 +537,22 @@ idle_alarm_expired (enum alarm_id al_id, void *ctx, lsquic_time_t expiry,
lsquic_time_t now)
{
struct ietf_full_conn *const conn = (struct ietf_full_conn *) ctx;
LSQ_DEBUG("connection timed out");
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out");
conn->ifc_flags |= IFC_TIMED_OUT;
if ((conn->ifc_mflags & MF_NOPROG_TIMEOUT)
&& conn->ifc_pub.last_prog + conn->ifc_enpub->enp_noprog_timeout < now)
{
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out due to "
"lack of progress");
/* Different flag so that CONNECTION_CLOSE frame is sent */
ABORT_QUIETLY(0, TEC_APPLICATION_ERROR,
"connection timed out due to lack of progress");
}
else
{
LSQ_DEBUG("connection timed out");
EV_LOG_CONN_EVENT(LSQUIC_LOG_CONN_ID, "connection timed out");
conn->ifc_flags |= IFC_TIMED_OUT;
}
}
@ -564,6 +581,14 @@ cid_throt_alarm_expired (enum alarm_id al_id, void *ctx,
}
static void
wipe_path (struct ietf_full_conn *conn, unsigned path_id)
{
memset(&conn->ifc_paths[path_id], 0, sizeof(conn->ifc_paths[0]));
conn->ifc_paths[path_id].cop_path.np_path_id = path_id;
}
static void
path_chal_alarm_expired (enum alarm_id al_id, void *ctx,
lsquic_time_t expiry, lsquic_time_t now, unsigned path_id)
@ -577,12 +602,15 @@ path_chal_alarm_expired (enum alarm_id al_id, void *ctx,
LSQ_DEBUG("path #%u challenge expired, schedule another one", path_id);
conn->ifc_send_flags |= SF_SEND_PATH_CHAL << path_id;
}
else
else if (conn->ifc_cur_path_id != path_id)
{
LSQ_INFO("migration to path #%u failed after none of %u path "
"challenges received responses", path_id, copath->cop_n_chals);
memset(copath, 0, sizeof(*copath));
wipe_path(conn, path_id);
}
else
LSQ_INFO("no path challenge responses on current path %u, stop "
"sending path challenges", path_id);
}
@ -1132,6 +1160,8 @@ ietf_full_conn_init (struct ietf_full_conn *conn,
conn->ifc_ping_unretx_thresh = 20;
conn->ifc_max_retx_since_last_ack = MAX_RETR_PACKETS_SINCE_LAST_ACK;
maybe_enable_spin(conn);
if (conn->ifc_settings->es_noprogress_timeout)
conn->ifc_mflags |= MF_NOPROG_TIMEOUT;
return 0;
}
@ -1422,14 +1452,21 @@ lsquic_ietf_full_conn_server_new (struct lsquic_engine_public *enpub,
*/
have_outgoing_ack = 0;
next_packno = ~0ULL;
/* mini conn may drop Init packets, making gaps; don't warn about them: */
conn->ifc_send_ctl.sc_senhist.sh_flags |= SH_GAP_OK;
while ((packet_out = TAILQ_FIRST(&imc->imc_packets_out)))
{
TAILQ_REMOVE(&imc->imc_packets_out, packet_out, po_next);
/* Holes in the sequence signify ACKed or lost packets */
/* Holes in the sequence signify no-longer-relevant Initial packets or
* ACKed or lost packets.
*/
++next_packno;
for ( ; next_packno < packet_out->po_packno; ++next_packno)
{
lsquic_senhist_add(&conn->ifc_send_ctl.sc_senhist, next_packno);
conn->ifc_send_ctl.sc_senhist.sh_warn_thresh = next_packno;
}
packet_out->po_path = CUR_NPATH(conn);
if (imc->imc_sent_packnos & (1ULL << packet_out->po_packno))
@ -1453,6 +1490,11 @@ lsquic_ietf_full_conn_server_new (struct lsquic_engine_public *enpub,
(1 << QUIC_FRAME_ACK);
}
}
conn->ifc_send_ctl.sc_senhist.sh_flags &= ~SH_GAP_OK;
/* ...Yes, that's a bunch of little annoying steps to suppress the gap
* warnings, but it would have been even more annoying (and expensive)
* to add packet renumbering logic to the mini conn.
*/
for (pns = 0; pns < N_PNS; ++pns)
for (i = 0; i < 4; ++i)
@ -4307,10 +4349,7 @@ switch_path_to (struct ietf_full_conn *conn, unsigned char path_id)
conn->ifc_send_flags &= ~(SF_SEND_PATH_RESP << old_path_id);
lsquic_alarmset_unset(&conn->ifc_alset, AL_PATH_CHAL + old_path_id);
if (conn->ifc_flags & IFC_SERVER)
{
memset(&conn->ifc_paths[old_path_id], 0, sizeof(conn->ifc_paths[0]));
conn->ifc_paths[old_path_id].cop_path.np_path_id = old_path_id;
}
wipe_path(conn, old_path_id);
}
@ -5417,6 +5456,24 @@ process_retire_connection_id_frame (struct ietf_full_conn *conn,
return 0;
}
retire_cid(conn, cce, packet_in->pi_received);
if (lconn->cn_cur_cce_idx == cce - lconn->cn_cces)
{
cce = find_cce_by_cid(conn, &packet_in->pi_dcid);
if (cce)
{
LSQ_DEBUGC("current SCID was retired; set current SCID to "
"%"CID_FMT" based on DCID in incoming packet",
CID_BITS(&packet_in->pi_dcid));
cce->cce_flags |= CCE_USED;
lconn->cn_cur_cce_idx = cce - lconn->cn_cces;
}
else
LSQ_WARN("current SCID was retired; no new SCID candidate");
/* This could theoretically happen when zero-length CIDs were
* used. Currently, there should be no way lsquic could get
* into this situation.
*/
}
}
else
LSQ_DEBUG("cannot retire CID seqno=%"PRIu64": not found", seqno);
@ -6521,15 +6578,29 @@ process_incoming_packet_fast (struct ietf_full_conn *conn,
}
static void
set_earliest_idle_alarm (struct ietf_full_conn *conn, lsquic_time_t idle_conn_to)
{
lsquic_time_t exp;
if (conn->ifc_pub.last_prog
&& (assert(conn->ifc_mflags & MF_NOPROG_TIMEOUT),
exp = conn->ifc_pub.last_prog + conn->ifc_enpub->enp_noprog_timeout,
exp < idle_conn_to))
idle_conn_to = exp;
if (idle_conn_to)
lsquic_alarmset_set(&conn->ifc_alset, AL_IDLE, idle_conn_to);
}
static void
ietf_full_conn_ci_packet_in (struct lsquic_conn *lconn,
struct lsquic_packet_in *packet_in)
{
struct ietf_full_conn *conn = (struct ietf_full_conn *) lconn;
if (conn->ifc_idle_to)
lsquic_alarmset_set(&conn->ifc_alset, AL_IDLE,
packet_in->pi_received + conn->ifc_idle_to);
set_earliest_idle_alarm(conn, conn->ifc_idle_to
? packet_in->pi_received + conn->ifc_idle_to : 0);
if (0 == (conn->ifc_flags & IFC_IMMEDIATE_CLOSE_FLAGS))
if (0 != conn->ifc_process_incoming_packet(conn, packet_in))
conn->ifc_flags |= IFC_ERROR;
@ -6646,6 +6717,32 @@ static void (*const send_funcs[N_SEND])(
|SF_SEND_ACK_FREQUENCY\
|SF_SEND_STOP_SENDING)
/* This should be called before lsquic_alarmset_ring_expired() */
static void
maybe_set_noprogress_alarm (struct ietf_full_conn *conn, lsquic_time_t now)
{
lsquic_time_t exp;
if (conn->ifc_mflags & MF_NOPROG_TIMEOUT)
{
if (conn->ifc_pub.last_tick)
{
exp = conn->ifc_pub.last_prog + conn->ifc_enpub->enp_noprog_timeout;
if (!lsquic_alarmset_is_set(&conn->ifc_alset, AL_IDLE)
|| exp < conn->ifc_alset.as_expiry[AL_IDLE])
lsquic_alarmset_set(&conn->ifc_alset, AL_IDLE, exp);
conn->ifc_pub.last_tick = now;
}
else
{
conn->ifc_pub.last_tick = now;
conn->ifc_pub.last_prog = now;
}
}
}
static enum tick_st
ietf_full_conn_ci_tick (struct lsquic_conn *lconn, lsquic_time_t now)
{
@ -6688,6 +6785,8 @@ ietf_full_conn_ci_tick (struct lsquic_conn *lconn, lsquic_time_t now)
conn->ifc_flags &= ~IFC_HAVE_SAVED_ACK;
}
maybe_set_noprogress_alarm(conn, now);
lsquic_send_ctl_tick_in(&conn->ifc_send_ctl, now);
lsquic_send_ctl_set_buffer_stream_packets(&conn->ifc_send_ctl, 1);
CLOSE_IF_NECESSARY();

23
src/liblsquic/lsquic_mini_conn_ietf.c
View File

@ -635,7 +635,7 @@ ietf_mini_conn_ci_is_tickable (struct lsquic_conn *lconn)
if (!(packet_out->po_flags & PO_SENT))
{
packet_size = lsquic_packet_out_total_sz(lconn, packet_out);
return imico_can_send(conn, packet_size + IQUIC_TAG_LEN);
return imico_can_send(conn, packet_size);
}
return 0;
@ -665,15 +665,15 @@ ietf_mini_conn_ci_next_packet_to_send (struct lsquic_conn *lconn, size_t size)
packet_size = lsquic_packet_out_total_sz(lconn, packet_out);
if (size == 0 || packet_size + size <= conn->imc_path.np_pack_size)
{
if (!imico_can_send(conn, packet_size + IQUIC_TAG_LEN))
if (!imico_can_send(conn, packet_size))
{
LSQ_DEBUG("cannot send packet %"PRIu64" of size %zu: client "
"address has not been validated", packet_out->po_packno,
packet_size + IQUIC_TAG_LEN);
packet_size);
return NULL;
}
packet_out->po_flags |= PO_SENT;
conn->imc_bytes_out += packet_size + IQUIC_TAG_LEN;
conn->imc_bytes_out += packet_size;
if (size == 0)
LSQ_DEBUG("packet_to_send: %"PRIu64, packet_out->po_packno);
else
@ -1310,7 +1310,7 @@ ietf_mini_conn_ci_packet_not_sent (struct lsquic_conn *lconn,
packet_out->po_flags &= ~PO_SENT;
packet_size = lsquic_packet_out_total_sz(lconn, packet_out);
conn->imc_bytes_out -= packet_size + IQUIC_TAG_LEN;
conn->imc_bytes_out -= packet_size;
LSQ_DEBUG("%s: packet %"PRIu64" not sent", __func__, packet_out->po_packno);
}
@ -1356,9 +1356,11 @@ imico_handle_losses_and_have_unsent (struct ietf_mini_conn *conn,
{
TAILQ_HEAD(, lsquic_packet_out) lost_packets =
TAILQ_HEAD_INITIALIZER(lost_packets);
const struct lsquic_conn *const lconn = &conn->imc_conn;
lsquic_packet_out_t *packet_out, *next;
lsquic_time_t retx_to = 0;
unsigned n_to_send = 0;
size_t packet_size;
for (packet_out = TAILQ_FIRST(&conn->imc_packets_out); packet_out;
packet_out = next)
@ -1376,8 +1378,11 @@ imico_handle_losses_and_have_unsent (struct ietf_mini_conn *conn,
TAILQ_INSERT_TAIL(&lost_packets, packet_out, po_next);
}
}
else
else if (packet_size = lsquic_packet_out_total_sz(lconn, packet_out),
imico_can_send(conn, packet_size))
++n_to_send;
else
break;
}
conn->imc_hsk_count += !TAILQ_EMPTY(&lost_packets);
@ -1387,7 +1392,11 @@ imico_handle_losses_and_have_unsent (struct ietf_mini_conn *conn,
TAILQ_REMOVE(&lost_packets, packet_out, po_next);
if ((packet_out->po_frame_types & IQUIC_FRAME_RETX_MASK)
&& 0 == imico_repackage_packet(conn, packet_out))
++n_to_send;
{
packet_size = lsquic_packet_out_total_sz(lconn, packet_out);
if (imico_can_send(conn, packet_size))
++n_to_send;
}
else
imico_destroy_packet(conn, packet_out);
}

3
src/liblsquic/lsquic_packet_out.h
View File

@ -220,7 +220,8 @@ typedef struct lsquic_packet_out
#if LSQUIC_EXTRA_CHECKS
#define lsquic_packet_out_sent_sz(lconn, p) ( \
__builtin_expect(((p)->po_flags & PO_SENT_SZ), 1) ? \
(assert((p)->po_sent_sz == lsquic_packet_out_total_sz(lconn, p)), \
(assert(((p)->po_flags & PO_HELLO /* Avoid client DCID change */) \
|| (p)->po_sent_sz == lsquic_packet_out_total_sz(lconn, p)), \
(p)->po_sent_sz) : lsquic_packet_out_total_sz(lconn, p))
# else
#define lsquic_packet_out_sent_sz(lconn, p) ( \

12
src/liblsquic/lsquic_send_ctl.c
View File

@ -363,10 +363,7 @@ lsquic_send_ctl_init (lsquic_send_ctl_t *ctl, struct lsquic_alarmset *alset,
ctl->sc_cached_bpt.stream_id = UINT64_MAX;
#if LSQUIC_EXTRA_CHECKS
ctl->sc_flags |= SC_SANITY_CHECK;
#else
if ((ctl->sc_conn_pub->lconn->cn_flags & (LSCONN_IETF|LSCONN_SERVER))
== LSCONN_IETF)
ctl->sc_flags |= SC_SANITY_CHECK;
LSQ_DEBUG("sanity checks enabled");
#endif
ctl->sc_gap = UINT64_MAX - 1 /* Can't have +1 == 0 */;
if ((ctl->sc_conn_pub->lconn->cn_flags & (LSCONN_IETF|LSCONN_SERVER))
@ -2227,7 +2224,8 @@ lsquic_send_ctl_squeeze_sched (lsquic_send_ctl_t *ctl)
packet_out = next)
{
next = TAILQ_NEXT(packet_out, po_next);
if (packet_out->po_regen_sz < packet_out->po_data_sz)
if (packet_out->po_regen_sz < packet_out->po_data_sz
|| packet_out->po_frame_types == QUIC_FTBIT_PATH_CHALLENGE)
{
if (packet_out->po_flags & PO_ENCRYPTED)
send_ctl_return_enc_data(ctl, packet_out);
@ -2238,7 +2236,7 @@ lsquic_send_ctl_squeeze_sched (lsquic_send_ctl_t *ctl)
/* Log the whole list before we squeeze for the first time */
if (!pre_squeeze_logged++)
LOG_PACKET_Q(&ctl->sc_scheduled_packets,
"unacked packets before squeezing");
"scheduled packets before squeezing");
#endif
send_ctl_sched_remove(ctl, packet_out);
LSQ_DEBUG("Dropping packet %"PRIu64" from scheduled queue",
@ -2255,7 +2253,7 @@ lsquic_send_ctl_squeeze_sched (lsquic_send_ctl_t *ctl)
#ifndef NDEBUG
if (pre_squeeze_logged)
LOG_PACKET_Q(&ctl->sc_scheduled_packets,
"unacked packets after squeezing");
"scheduled packets after squeezing");
else if (ctl->sc_n_scheduled > 0)
LOG_PACKET_Q(&ctl->sc_scheduled_packets, "delayed packets");
#endif

11
src/liblsquic/lsquic_senhist.h
View File

@ -16,11 +16,14 @@
typedef struct lsquic_senhist {
lsquic_packno_t sh_last_sent;
lsquic_packno_t sh_warn_thresh;
enum {
#if !LSQUIC_SENHIST_FATAL
SH_WARNED = 1 << 0, /* Warn once */
#endif
SH_GAP_OK = 1 << 1, /* Before connection is just about to close */
SH_GAP_OK = 1 << 1, /* Before connection is just about to close or
* during mini/full packet handoff.
*/
} sh_flags;
} lsquic_senhist_t;
@ -35,7 +38,8 @@ typedef struct lsquic_senhist {
#if LSQUIC_SENHIST_FATAL
#define lsquic_senhist_add(hist, packno) do { \
if (!((hist)->sh_flags & SH_GAP_OK)) \
if (!((hist)->sh_flags & SH_GAP_OK) \
&& (packno) > (hist)->sh_warn_thresh) \
assert((hist)->sh_last_sent == packno - 1); \
if ((int64_t) (packno) > (int64_t) (hist)->sh_last_sent) \
(hist)->sh_last_sent = packno; \
@ -44,7 +48,8 @@ typedef struct lsquic_senhist {
#define lsquic_senhist_add(hist, packno) do { \
if ((hist)->sh_last_sent != packno - 1) \
{ \
if (!((hist)->sh_flags & (SH_WARNED|SH_GAP_OK))) \
if (!((hist)->sh_flags & (SH_WARNED|SH_GAP_OK)) \
&& (packno) > (hist)->sh_warn_thresh) \
{ \
LSQ_WARN("send history gap %"PRIu64" - %"PRIu64, \
(hist)->sh_last_sent, packno); \

2
src/liblsquic/lsquic_sfcw.c
View File

@ -137,7 +137,7 @@ lsquic_sfcw_set_max_recv_off (struct lsquic_sfcw *fc, uint64_t max_recv_off)
}
else
{
LSQ_WARN("flow control violation: received at offset %"PRIu64", "
LSQ_INFO("flow control violation: received at offset %"PRIu64", "
"while flow control receive offset is %"PRIu64,
max_recv_off, fc->sf_recv_off);
return 0;

68
src/liblsquic/lsquic_stream.c
View File

@ -259,6 +259,26 @@ stream_inside_callback (const lsquic_stream_t *stream)
}
/* This is an approximation. If data is written or read outside of the
* event loop, last_prog will be somewhat out of date, but it's close
* enough for our purposes.
*/
static void
maybe_update_last_progress (struct lsquic_stream *stream)
{
if (stream->conn_pub && !lsquic_stream_is_critical(stream))
{
if (stream->conn_pub->last_prog != stream->conn_pub->last_tick)
LSQ_DEBUG("update last progress to %"PRIu64,
stream->conn_pub->last_tick);
stream->conn_pub->last_prog = stream->conn_pub->last_tick;
#ifndef NDEBUG
stream->sm_last_prog = stream->conn_pub->last_tick;
#endif
}
}
static void
maybe_conn_to_tickable (lsquic_stream_t *stream)
{
@ -1460,6 +1480,8 @@ ssize_t
lsquic_stream_readf (struct lsquic_stream *stream,
size_t (*readf)(void *, const unsigned char *, size_t, int), void *ctx)
{
ssize_t nread;
SM_HISTORY_APPEND(stream, SHE_USER_READ);
if (lsquic_stream_is_reset(stream))
@ -1485,7 +1507,11 @@ lsquic_stream_readf (struct lsquic_stream *stream,
return 0;
}
return stream_readf(stream, readf, ctx);
nread = stream_readf(stream, readf, ctx);
if (nread >= 0)
maybe_update_last_progress(stream);
return nread;
}
@ -2745,6 +2771,9 @@ verify_conn_cap (const struct lsquic_conn_public *conn_pub)
struct lsquic_hash_elem *el;
unsigned n_buffered;
if (conn_pub->wtp_level > 1)
return;
if (!conn_pub->all_streams)
/* TODO: enable this check for unit tests as well */
return;
@ -2760,6 +2789,7 @@ verify_conn_cap (const struct lsquic_conn_public *conn_pub)
assert(n_buffered + conn_pub->stream_frame_bytes
== conn_pub->conn_cap.cc_sent);
LSQ_DEBUG("%s: cc_sent: %"PRIu64, __func__, conn_pub->conn_cap.cc_sent);
}
@ -3056,6 +3086,10 @@ stream_write_to_packets (lsquic_stream_t *stream, struct lsquic_reader *reader,
.fgc_nread_from_reader = 0,
};
#if LSQUIC_EXTRA_CHECKS
if (stream->conn_pub)
++stream->conn_pub->wtp_level;
#endif
use_framing = (stream->sm_bflags & (SMBF_IETF|SMBF_USE_HEADERS))
== (SMBF_IETF|SMBF_USE_HEADERS);
if (use_framing)
@ -3079,7 +3113,10 @@ stream_write_to_packets (lsquic_stream_t *stream, struct lsquic_reader *reader,
{
case SWTP_OK:
if (!seen_ok++)
{
maybe_conn_to_tickable_if_writeable(stream, 0);
maybe_update_last_progress(stream);
}
if (fg_ctx.fgc_fin(&fg_ctx))
{
if (use_framing && seen_ok)
@ -3097,7 +3134,7 @@ stream_write_to_packets (lsquic_stream_t *stream, struct lsquic_reader *reader,
default:
abort_connection(stream);
stream->stream_flags &= ~STREAM_LAST_WRITE_OK;
return -1;
goto err;
}
}
@ -3113,7 +3150,7 @@ stream_write_to_packets (lsquic_stream_t *stream, struct lsquic_reader *reader,
{
nw = save_to_buffer(stream, reader, size);
if (nw < 0)
return -1;
goto err;
fg_ctx.fgc_nread_from_reader += nw; /* Make this cleaner? */
}
}
@ -3129,7 +3166,18 @@ stream_write_to_packets (lsquic_stream_t *stream, struct lsquic_reader *reader,
maybe_mark_as_blocked(stream);
end:
#if LSQUIC_EXTRA_CHECKS
if (stream->conn_pub)
--stream->conn_pub->wtp_level;
#endif
return fg_ctx.fgc_nread_from_reader;
err:
#if LSQUIC_EXTRA_CHECKS
if (stream->conn_pub)
--stream->conn_pub->wtp_level;
#endif
return -1;
}
@ -4056,6 +4104,7 @@ lsquic_stream_get_hset (struct lsquic_stream *stream)
stream->stream_flags |= STREAM_FIN_REACHED;
SM_HISTORY_APPEND(stream, SHE_REACH_FIN);
}
maybe_update_last_progress(stream);
LSQ_DEBUG("return header set");
return hset;
}
@ -4347,12 +4396,15 @@ hq_read (void *ctx, const unsigned char *buf, size_t sz, int fin)
LSQ_INFO("FIN at unexpected place in filter; state: %u",
filter->hqfi_state);
filter->hqfi_flags |= HQFI_FLAG_ERROR;
/* From [draft-ietf-quic-http-16] Section 3.1:
* When a stream terminates cleanly, if the last frame on
* the stream was truncated, this MUST be treated as a connection error
* (see HTTP_MALFORMED_FRAME in Section 8.1).
/* From [draft-ietf-quic-http-28] Section 7.1:
" When a stream terminates cleanly, if the last frame on the stream was
" truncated, this MUST be treated as a connection error (Section 8) of
" type H3_FRAME_ERROR. Streams which terminate abruptly may be reset
" at any point in a frame.
*/
abort_connection(stream);
lconn = stream->conn_pub->lconn;
lconn->cn_if->ci_abort_error(lconn, 1, HEC_FRAME_ERROR,
"last HTTP/3 frame on stream %"PRIu64" was truncated", stream->id);
}
return p - buf;

5
src/liblsquic/lsquic_stream.h
View File

@ -317,6 +317,11 @@ struct lsquic_stream
uint64_t sm_last_frame_off;
#ifndef NDEBUG
/* Last time stream made progress */
lsquic_time_t sm_last_prog;
#endif
/* Content length specified in incoming `content-length' header field.
* Used to verify size of DATA frames.
*/

2
src/lshpack

@ -1 +1 @@
Subproject commit b577d56964e443972adb38ec56706181846cc47f
Subproject commit bd5d58987e0e88d7c1b676f83624528926fb423a

1
tests/test_bw_sampler.c
View File

@ -79,6 +79,7 @@ sampler_test_send_packet (struct sampler_test *stest, lsquic_packno_t packno,
memset(packet_out, 0, sizeof(*packet_out));
packet_out->po_packno = packno;
packet_out->po_flags |= PO_SENT_SZ;
packet_out->po_flags |= PO_HELLO; /* Bypass sanity check */
packet_out->po_sent_sz = kRegularPacketSize;
packet_out->po_sent = stest->time;
if (retx)

6
tests/test_send_headers.c
View File

@ -143,11 +143,17 @@ get_network_path (struct lsquic_conn *lconn, const struct sockaddr *sa)
return &network_path;
}
static void
abort_error (struct lsquic_conn *lconn, int is_app,
unsigned error_code, const char *fmt, ...)
{
}
static const struct conn_iface our_conn_if =
{
.ci_can_write_ack = unit_test_doesnt_write_ack,
.ci_get_path = get_network_path,
.ci_abort_error = abort_error,
};

2
tests/test_senhist.c
View File

@ -14,7 +14,7 @@
int
main (void)
{
struct lsquic_senhist hist = { 0
struct lsquic_senhist hist = { 0, 0
#if !LSQUIC_SENHIST_FATAL
, 0
#endif