Adding upstream version 0.12.1+dfsg.upstream/0.12.1+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 821 insertions, 0 deletions

diff --git a/lib/ngtcp2_log.c b/lib/ngtcp2_log.c
new file mode 100644
index 0000000..28f3c93
--- /dev/null
+++ b/lib/ngtcp2_log.c
@@ -0,0 +1,821 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2018 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "ngtcp2_log.h"
+
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+#include <assert.h>
+#include <string.h>
+
+#include "ngtcp2_str.h"
+#include "ngtcp2_vec.h"
+#include "ngtcp2_macro.h"
+#include "ngtcp2_conv.h"
+#include "ngtcp2_unreachable.h"
+#include "ngtcp2_net.h"
+
+void ngtcp2_log_init(ngtcp2_log *log, const ngtcp2_cid *scid,
+                     ngtcp2_printf log_printf, ngtcp2_tstamp ts,
+                     void *user_data) {
+  if (scid) {
+    ngtcp2_encode_hex(log->scid, scid->data, scid->datalen);
+  } else {
+    log->scid[0] = '\0';
+  }
+  log->log_printf = log_printf;
+  log->ts = log->last_ts = ts;
+  log->user_data = user_data;
+}
+
+/*
+ * # Log header
+ *
+ * <LEVEL><TIMESTAMP> <SCID> <EVENT>
+ *
+ * <LEVEL>:
+ *   Log level.  I=Info, W=Warning, E=Error
+ *
+ * <TIMESTAMP>:
+ *   Timestamp relative to ngtcp2_log.ts field in milliseconds
+ *   resolution.
+ *
+ * <SCID>:
+ *   Source Connection ID in hex string.
+ *
+ * <EVENT>:
+ *   Event.  pkt=packet, frm=frame, rcv=recovery, cry=crypto,
+ *   con=connection(catch all)
+ *
+ * # Frame event
+ *
+ * <DIR> <PKN> <PKTNAME> <FRAMENAME>(<FRAMETYPE>)
+ *
+ * <DIR>:
+ *   Flow direction.  tx=transmission, rx=reception
+ *
+ * <PKN>:
+ *   Packet number.
+ *
+ * <PKTNAME>:
+ *   Packet name.  (e.g., Initial, Handshake, 1RTT)
+ *
+ * <FRAMENAME>:
+ *   Frame name.  (e.g., STREAM, ACK, PING)
+ *
+ * <FRAMETYPE>:
+ *   Frame type in hex string.
+ */
+
+#define NGTCP2_LOG_BUFLEN 4096
+
+/* TODO Split second and remaining fraction with comma */
+#define NGTCP2_LOG_HD "I%08" PRIu64 " 0x%s %s"
+#define NGTCP2_LOG_PKT NGTCP2_LOG_HD " %s %" PRId64 " %s"
+#define NGTCP2_LOG_TP NGTCP2_LOG_HD " remote transport_parameters"
+
+#define NGTCP2_LOG_FRM_HD_FIELDS(DIR)                                          \
+  timestamp_cast(log->last_ts - log->ts), (const char *)log->scid, "frm",      \
+      (DIR), hd->pkt_num, strpkttype(hd)
+
+#define NGTCP2_LOG_PKT_HD_FIELDS(DIR)                                          \
+  timestamp_cast(log->last_ts - log->ts), (const char *)log->scid, "pkt",      \
+      (DIR), hd->pkt_num, strpkttype(hd)
+
+#define NGTCP2_LOG_TP_HD_FIELDS                                                \
+  timestamp_cast(log->last_ts - log->ts), (const char *)log->scid, "cry"
+
+static const char *strerrorcode(uint64_t error_code) {
+  switch (error_code) {
+  case NGTCP2_NO_ERROR:
+    return "NO_ERROR";
+  case NGTCP2_INTERNAL_ERROR:
+    return "INTERNAL_ERROR";
+  case NGTCP2_CONNECTION_REFUSED:
+    return "CONNECTION_REFUSED";
+  case NGTCP2_FLOW_CONTROL_ERROR:
+    return "FLOW_CONTROL_ERROR";
+  case NGTCP2_STREAM_LIMIT_ERROR:
+    return "STREAM_LIMIT_ERROR";
+  case NGTCP2_STREAM_STATE_ERROR:
+    return "STREAM_STATE_ERROR";
+  case NGTCP2_FINAL_SIZE_ERROR:
+    return "FINAL_SIZE_ERROR";
+  case NGTCP2_FRAME_ENCODING_ERROR:
+    return "FRAME_ENCODING_ERROR";
+  case NGTCP2_TRANSPORT_PARAMETER_ERROR:
+    return "TRANSPORT_PARAMETER_ERROR";
+  case NGTCP2_CONNECTION_ID_LIMIT_ERROR:
+    return "CONNECTION_ID_LIMIT_ERROR";
+  case NGTCP2_PROTOCOL_VIOLATION:
+    return "PROTOCOL_VIOLATION";
+  case NGTCP2_INVALID_TOKEN:
+    return "INVALID_TOKEN";
+  case NGTCP2_APPLICATION_ERROR:
+    return "APPLICATION_ERROR";
+  case NGTCP2_CRYPTO_BUFFER_EXCEEDED:
+    return "CRYPTO_BUFFER_EXCEEDED";
+  case NGTCP2_KEY_UPDATE_ERROR:
+    return "KEY_UPDATE_ERROR";
+  case NGTCP2_VERSION_NEGOTIATION_ERROR_DRAFT:
+    return "VERSION_NEGOTIATION_ERROR";
+  default:
+    if (0x100u <= error_code && error_code <= 0x1ffu) {
+      return "CRYPTO_ERROR";
+    }
+    return "(unknown)";
+  }
+}
+
+static const char *strapperrorcode(uint64_t app_error_code) {
+  (void)app_error_code;
+  return "(unknown)";
+}
+
+static const char *strpkttype_long(uint8_t type) {
+  switch (type) {
+  case NGTCP2_PKT_INITIAL:
+    return "Initial";
+  case NGTCP2_PKT_RETRY:
+    return "Retry";
+  case NGTCP2_PKT_HANDSHAKE:
+    return "Handshake";
+  case NGTCP2_PKT_0RTT:
+    return "0RTT";
+  default:
+    return "(unknown)";
+  }
+}
+
+static const char *strpkttype(const ngtcp2_pkt_hd *hd) {
+  if (hd->flags & NGTCP2_PKT_FLAG_LONG_FORM) {
+    return strpkttype_long(hd->type);
+  }
+
+  switch (hd->type) {
+  case NGTCP2_PKT_VERSION_NEGOTIATION:
+    return "VN";
+  case NGTCP2_PKT_STATELESS_RESET:
+    return "SR";
+  case NGTCP2_PKT_1RTT:
+    return "1RTT";
+  default:
+    return "(unknown)";
+  }
+}
+
+static const char *strpkttype_type_flags(uint8_t type, uint8_t flags) {
+  ngtcp2_pkt_hd hd = {0};
+
+  hd.type = type;
+  hd.flags = flags;
+
+  return strpkttype(&hd);
+}
+
+static const char *strevent(ngtcp2_log_event ev) {
+  switch (ev) {
+  case NGTCP2_LOG_EVENT_CON:
+    return "con";
+  case NGTCP2_LOG_EVENT_PKT:
+    return "pkt";
+  case NGTCP2_LOG_EVENT_FRM:
+    return "frm";
+  case NGTCP2_LOG_EVENT_RCV:
+    return "rcv";
+  case NGTCP2_LOG_EVENT_CRY:
+    return "cry";
+  case NGTCP2_LOG_EVENT_PTV:
+    return "ptv";
+  case NGTCP2_LOG_EVENT_NONE:
+  default:
+    return "non";
+  }
+}
+
+static uint64_t timestamp_cast(uint64_t ns) { return ns / NGTCP2_MILLISECONDS; }
+
+static void log_fr_stream(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                          const ngtcp2_stream *fr, const char *dir) {
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_PKT " STREAM(0x%02x) id=0x%" PRIx64 " fin=%d offset=%" PRIu64
+                      " len=%" PRIu64 " uni=%d"),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type | fr->flags, fr->stream_id,
+      fr->fin, fr->offset, ngtcp2_vec_len(fr->data, fr->datacnt),
+      (fr->stream_id & 0x2) != 0);
+}
+
+static void log_fr_ack(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                       const ngtcp2_ack *fr, const char *dir) {
+  int64_t largest_ack, min_ack;
+  size_t i;
+
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " ACK(0x%02x) largest_ack=%" PRId64
+                                  " ack_delay=%" PRIu64 "(%" PRIu64
+                                  ") ack_range_count=%zu"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->largest_ack,
+                  fr->ack_delay_unscaled / NGTCP2_MILLISECONDS, fr->ack_delay,
+                  fr->rangecnt);
+
+  largest_ack = fr->largest_ack;
+  min_ack = fr->largest_ack - (int64_t)fr->first_ack_range;
+
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " ACK(0x%02x) range=[%" PRId64 "..%" PRId64
+                                  "] len=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, largest_ack, min_ack,
+                  fr->first_ack_range);
+
+  for (i = 0; i < fr->rangecnt; ++i) {
+    const ngtcp2_ack_range *range = &fr->ranges[i];
+    largest_ack = min_ack - (int64_t)range->gap - 2;
+    min_ack = largest_ack - (int64_t)range->len;
+    log->log_printf(log->user_data,
+                    (NGTCP2_LOG_PKT " ACK(0x%02x) range=[%" PRId64 "..%" PRId64
+                                    "] gap=%" PRIu64 " len=%" PRIu64),
+                    NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, largest_ack,
+                    min_ack, range->gap, range->len);
+  }
+
+  if (fr->type == NGTCP2_FRAME_ACK_ECN) {
+    log->log_printf(log->user_data,
+                    (NGTCP2_LOG_PKT " ACK(0x%02x) ect0=%" PRIu64
+                                    " ect1=%" PRIu64 " ce=%" PRIu64),
+                    NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->ecn.ect0,
+                    fr->ecn.ect1, fr->ecn.ce);
+  }
+}
+
+static void log_fr_padding(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                           const ngtcp2_padding *fr, const char *dir) {
+  log->log_printf(log->user_data, (NGTCP2_LOG_PKT " PADDING(0x%02x) len=%zu"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->len);
+}
+
+static void log_fr_reset_stream(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                const ngtcp2_reset_stream *fr,
+                                const char *dir) {
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_PKT " RESET_STREAM(0x%02x) id=0x%" PRIx64
+                      " app_error_code=%s(0x%" PRIx64 ") final_size=%" PRIu64),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->stream_id,
+      strapperrorcode(fr->app_error_code), fr->app_error_code, fr->final_size);
+}
+
+static void log_fr_connection_close(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                    const ngtcp2_connection_close *fr,
+                                    const char *dir) {
+  char reason[256];
+  size_t reasonlen = ngtcp2_min(sizeof(reason) - 1, fr->reasonlen);
+
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT
+                   " CONNECTION_CLOSE(0x%02x) error_code=%s(0x%" PRIx64 ") "
+                   "frame_type=%" PRIx64 " reason_len=%zu reason=[%s]"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type,
+                  fr->type == NGTCP2_FRAME_CONNECTION_CLOSE
+                      ? strerrorcode(fr->error_code)
+                      : strapperrorcode(fr->error_code),
+                  fr->error_code, fr->frame_type, fr->reasonlen,
+                  ngtcp2_encode_printable_ascii(reason, fr->reason, reasonlen));
+}
+
+static void log_fr_max_data(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                            const ngtcp2_max_data *fr, const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " MAX_DATA(0x%02x) max_data=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->max_data);
+}
+
+static void log_fr_max_stream_data(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                   const ngtcp2_max_stream_data *fr,
+                                   const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " MAX_STREAM_DATA(0x%02x) id=0x%" PRIx64
+                                  " max_stream_data=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->stream_id,
+                  fr->max_stream_data);
+}
+
+static void log_fr_max_streams(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                               const ngtcp2_max_streams *fr, const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " MAX_STREAMS(0x%02x) max_streams=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->max_streams);
+}
+
+static void log_fr_ping(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                        const ngtcp2_ping *fr, const char *dir) {
+  log->log_printf(log->user_data, (NGTCP2_LOG_PKT " PING(0x%02x)"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type);
+}
+
+static void log_fr_data_blocked(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                const ngtcp2_data_blocked *fr,
+                                const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " DATA_BLOCKED(0x%02x) offset=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->offset);
+}
+
+static void log_fr_stream_data_blocked(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                       const ngtcp2_stream_data_blocked *fr,
+                                       const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " STREAM_DATA_BLOCKED(0x%02x) id=0x%" PRIx64
+                                  " offset=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->stream_id,
+                  fr->offset);
+}
+
+static void log_fr_streams_blocked(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                   const ngtcp2_streams_blocked *fr,
+                                   const char *dir) {
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_PKT " STREAMS_BLOCKED(0x%02x) max_streams=%" PRIu64),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->max_streams);
+}
+
+static void log_fr_new_connection_id(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                     const ngtcp2_new_connection_id *fr,
+                                     const char *dir) {
+  uint8_t buf[sizeof(fr->stateless_reset_token) * 2 + 1];
+  uint8_t cid[sizeof(fr->cid.data) * 2 + 1];
+
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_PKT " NEW_CONNECTION_ID(0x%02x) seq=%" PRIu64
+                      " cid=0x%s retire_prior_to=%" PRIu64
+                      " stateless_reset_token=0x%s"),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->seq,
+      (const char *)ngtcp2_encode_hex(cid, fr->cid.data, fr->cid.datalen),
+      fr->retire_prior_to,
+      (const char *)ngtcp2_encode_hex(buf, fr->stateless_reset_token,
+                                      sizeof(fr->stateless_reset_token)));
+}
+
+static void log_fr_stop_sending(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                const ngtcp2_stop_sending *fr,
+                                const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " STOP_SENDING(0x%02x) id=0x%" PRIx64
+                                  " app_error_code=%s(0x%" PRIx64 ")"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->stream_id,
+                  strapperrorcode(fr->app_error_code), fr->app_error_code);
+}
+
+static void log_fr_path_challenge(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                  const ngtcp2_path_challenge *fr,
+                                  const char *dir) {
+  uint8_t buf[sizeof(fr->data) * 2 + 1];
+
+  log->log_printf(
+      log->user_data, (NGTCP2_LOG_PKT " PATH_CHALLENGE(0x%02x) data=0x%s"),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type,
+      (const char *)ngtcp2_encode_hex(buf, fr->data, sizeof(fr->data)));
+}
+
+static void log_fr_path_response(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                 const ngtcp2_path_response *fr,
+                                 const char *dir) {
+  uint8_t buf[sizeof(fr->data) * 2 + 1];
+
+  log->log_printf(
+      log->user_data, (NGTCP2_LOG_PKT " PATH_RESPONSE(0x%02x) data=0x%s"),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type,
+      (const char *)ngtcp2_encode_hex(buf, fr->data, sizeof(fr->data)));
+}
+
+static void log_fr_crypto(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                          const ngtcp2_crypto *fr, const char *dir) {
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_PKT " CRYPTO(0x%02x) offset=%" PRIu64 " len=%" PRIu64),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->offset,
+      ngtcp2_vec_len(fr->data, fr->datacnt));
+}
+
+static void log_fr_new_token(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                             const ngtcp2_new_token *fr, const char *dir) {
+  /* Show at most first 64 bytes of token.  If token is longer than 64
+     bytes, log first 64 bytes and then append "*" */
+  uint8_t buf[128 + 1 + 1];
+  uint8_t *p;
+
+  if (fr->token.len > 64) {
+    p = ngtcp2_encode_hex(buf, fr->token.base, 64);
+    p[128] = '*';
+    p[129] = '\0';
+  } else {
+    p = ngtcp2_encode_hex(buf, fr->token.base, fr->token.len);
+  }
+  log->log_printf(
+      log->user_data, (NGTCP2_LOG_PKT " NEW_TOKEN(0x%02x) token=0x%s len=%zu"),
+      NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, (const char *)p, fr->token.len);
+}
+
+static void log_fr_retire_connection_id(ngtcp2_log *log,
+                                        const ngtcp2_pkt_hd *hd,
+                                        const ngtcp2_retire_connection_id *fr,
+                                        const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " RETIRE_CONNECTION_ID(0x%02x) seq=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type, fr->seq);
+}
+
+static void log_fr_handshake_done(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                                  const ngtcp2_handshake_done *fr,
+                                  const char *dir) {
+  log->log_printf(log->user_data, (NGTCP2_LOG_PKT " HANDSHAKE_DONE(0x%02x)"),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type);
+}
+
+static void log_fr_datagram(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                            const ngtcp2_datagram *fr, const char *dir) {
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_PKT " DATAGRAM(0x%02x) len=%" PRIu64),
+                  NGTCP2_LOG_FRM_HD_FIELDS(dir), fr->type,
+                  ngtcp2_vec_len(fr->data, fr->datacnt));
+}
+
+static void log_fr(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                   const ngtcp2_frame *fr, const char *dir) {
+  switch (fr->type) {
+  case NGTCP2_FRAME_STREAM:
+    log_fr_stream(log, hd, &fr->stream, dir);
+    break;
+  case NGTCP2_FRAME_ACK:
+  case NGTCP2_FRAME_ACK_ECN:
+    log_fr_ack(log, hd, &fr->ack, dir);
+    break;
+  case NGTCP2_FRAME_PADDING:
+    log_fr_padding(log, hd, &fr->padding, dir);
+    break;
+  case NGTCP2_FRAME_RESET_STREAM:
+    log_fr_reset_stream(log, hd, &fr->reset_stream, dir);
+    break;
+  case NGTCP2_FRAME_CONNECTION_CLOSE:
+  case NGTCP2_FRAME_CONNECTION_CLOSE_APP:
+    log_fr_connection_close(log, hd, &fr->connection_close, dir);
+    break;
+  case NGTCP2_FRAME_MAX_DATA:
+    log_fr_max_data(log, hd, &fr->max_data, dir);
+    break;
+  case NGTCP2_FRAME_MAX_STREAM_DATA:
+    log_fr_max_stream_data(log, hd, &fr->max_stream_data, dir);
+    break;
+  case NGTCP2_FRAME_MAX_STREAMS_BIDI:
+  case NGTCP2_FRAME_MAX_STREAMS_UNI:
+    log_fr_max_streams(log, hd, &fr->max_streams, dir);
+    break;
+  case NGTCP2_FRAME_PING:
+    log_fr_ping(log, hd, &fr->ping, dir);
+    break;
+  case NGTCP2_FRAME_DATA_BLOCKED:
+    log_fr_data_blocked(log, hd, &fr->data_blocked, dir);
+    break;
+  case NGTCP2_FRAME_STREAM_DATA_BLOCKED:
+    log_fr_stream_data_blocked(log, hd, &fr->stream_data_blocked, dir);
+    break;
+  case NGTCP2_FRAME_STREAMS_BLOCKED_BIDI:
+  case NGTCP2_FRAME_STREAMS_BLOCKED_UNI:
+    log_fr_streams_blocked(log, hd, &fr->streams_blocked, dir);
+    break;
+  case NGTCP2_FRAME_NEW_CONNECTION_ID:
+    log_fr_new_connection_id(log, hd, &fr->new_connection_id, dir);
+    break;
+  case NGTCP2_FRAME_STOP_SENDING:
+    log_fr_stop_sending(log, hd, &fr->stop_sending, dir);
+    break;
+  case NGTCP2_FRAME_PATH_CHALLENGE:
+    log_fr_path_challenge(log, hd, &fr->path_challenge, dir);
+    break;
+  case NGTCP2_FRAME_PATH_RESPONSE:
+    log_fr_path_response(log, hd, &fr->path_response, dir);
+    break;
+  case NGTCP2_FRAME_CRYPTO:
+    log_fr_crypto(log, hd, &fr->crypto, dir);
+    break;
+  case NGTCP2_FRAME_NEW_TOKEN:
+    log_fr_new_token(log, hd, &fr->new_token, dir);
+    break;
+  case NGTCP2_FRAME_RETIRE_CONNECTION_ID:
+    log_fr_retire_connection_id(log, hd, &fr->retire_connection_id, dir);
+    break;
+  case NGTCP2_FRAME_HANDSHAKE_DONE:
+    log_fr_handshake_done(log, hd, &fr->handshake_done, dir);
+    break;
+  case NGTCP2_FRAME_DATAGRAM:
+  case NGTCP2_FRAME_DATAGRAM_LEN:
+    log_fr_datagram(log, hd, &fr->datagram, dir);
+    break;
+  default:
+    ngtcp2_unreachable();
+  }
+}
+
+void ngtcp2_log_rx_fr(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                      const ngtcp2_frame *fr) {
+  if (!log->log_printf) {
+    return;
+  }
+
+  log_fr(log, hd, fr, "rx");
+}
+
+void ngtcp2_log_tx_fr(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                      const ngtcp2_frame *fr) {
+  if (!log->log_printf) {
+    return;
+  }
+
+  log_fr(log, hd, fr, "tx");
+}
+
+void ngtcp2_log_rx_vn(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                      const uint32_t *sv, size_t nsv) {
+  size_t i;
+
+  if (!log->log_printf) {
+    return;
+  }
+
+  for (i = 0; i < nsv; ++i) {
+    log->log_printf(log->user_data, (NGTCP2_LOG_PKT " v=0x%08x"),
+                    NGTCP2_LOG_PKT_HD_FIELDS("rx"), sv[i]);
+  }
+}
+
+void ngtcp2_log_rx_sr(ngtcp2_log *log, const ngtcp2_pkt_stateless_reset *sr) {
+  uint8_t buf[sizeof(sr->stateless_reset_token) * 2 + 1];
+  ngtcp2_pkt_hd shd;
+  ngtcp2_pkt_hd *hd = &shd;
+
+  if (!log->log_printf) {
+    return;
+  }
+
+  memset(&shd, 0, sizeof(shd));
+
+  shd.type = NGTCP2_PKT_STATELESS_RESET;
+
+  log->log_printf(
+      log->user_data, (NGTCP2_LOG_PKT " token=0x%s randlen=%zu"),
+      NGTCP2_LOG_PKT_HD_FIELDS("rx"),
+      (const char *)ngtcp2_encode_hex(buf, sr->stateless_reset_token,
+                                      sizeof(sr->stateless_reset_token)),
+      sr->randlen);
+}
+
+void ngtcp2_log_remote_tp(ngtcp2_log *log, uint8_t exttype,
+                          const ngtcp2_transport_params *params) {
+  uint8_t token[NGTCP2_STATELESS_RESET_TOKENLEN * 2 + 1];
+  uint8_t addr[16 * 2 + 7 + 1];
+  uint8_t cid[NGTCP2_MAX_CIDLEN * 2 + 1];
+  size_t i;
+  const ngtcp2_sockaddr_in *sa_in;
+  const ngtcp2_sockaddr_in6 *sa_in6;
+  const uint8_t *p;
+  uint32_t version;
+
+  if (!log->log_printf) {
+    return;
+  }
+
+  if (exttype == NGTCP2_TRANSPORT_PARAMS_TYPE_ENCRYPTED_EXTENSIONS) {
+    if (params->stateless_reset_token_present) {
+      log->log_printf(log->user_data,
+                      (NGTCP2_LOG_TP " stateless_reset_token=0x%s"),
+                      NGTCP2_LOG_TP_HD_FIELDS,
+                      (const char *)ngtcp2_encode_hex(
+                          token, params->stateless_reset_token,
+                          sizeof(params->stateless_reset_token)));
+    }
+
+    if (params->preferred_address_present) {
+      if (params->preferred_address.ipv4_present) {
+        sa_in = &params->preferred_address.ipv4;
+
+        log->log_printf(log->user_data,
+                        (NGTCP2_LOG_TP " preferred_address.ipv4_addr=%s"),
+                        NGTCP2_LOG_TP_HD_FIELDS,
+                        (const char *)ngtcp2_encode_ipv4(
+                            addr, (const uint8_t *)&sa_in->sin_addr));
+        log->log_printf(log->user_data,
+                        (NGTCP2_LOG_TP " preferred_address.ipv4_port=%u"),
+                        NGTCP2_LOG_TP_HD_FIELDS, ngtcp2_ntohs(sa_in->sin_port));
+      }
+
+      if (params->preferred_address.ipv6_present) {
+        sa_in6 = &params->preferred_address.ipv6;
+
+        log->log_printf(log->user_data,
+                        (NGTCP2_LOG_TP " preferred_address.ipv6_addr=%s"),
+                        NGTCP2_LOG_TP_HD_FIELDS,
+                        (const char *)ngtcp2_encode_ipv6(
+                            addr, (const uint8_t *)&sa_in6->sin6_addr));
+        log->log_printf(
+            log->user_data, (NGTCP2_LOG_TP " preferred_address.ipv6_port=%u"),
+            NGTCP2_LOG_TP_HD_FIELDS, ngtcp2_ntohs(sa_in6->sin6_port));
+      }
+
+      log->log_printf(log->user_data,
+                      (NGTCP2_LOG_TP " preferred_address.cid=0x%s"),
+                      NGTCP2_LOG_TP_HD_FIELDS,
+                      (const char *)ngtcp2_encode_hex(
+                          cid, params->preferred_address.cid.data,
+                          params->preferred_address.cid.datalen));
+      log->log_printf(
+          log->user_data,
+          (NGTCP2_LOG_TP " preferred_address.stateless_reset_token=0x%s"),
+          NGTCP2_LOG_TP_HD_FIELDS,
+          (const char *)ngtcp2_encode_hex(
+              token, params->preferred_address.stateless_reset_token,
+              sizeof(params->preferred_address.stateless_reset_token)));
+    }
+
+    log->log_printf(
+        log->user_data,
+        (NGTCP2_LOG_TP " original_destination_connection_id=0x%s"),
+        NGTCP2_LOG_TP_HD_FIELDS,
+        (const char *)ngtcp2_encode_hex(cid, params->original_dcid.data,
+                                        params->original_dcid.datalen));
+
+    if (params->retry_scid_present) {
+      log->log_printf(
+          log->user_data, (NGTCP2_LOG_TP " retry_source_connection_id=0x%s"),
+          NGTCP2_LOG_TP_HD_FIELDS,
+          (const char *)ngtcp2_encode_hex(cid, params->retry_scid.data,
+                                          params->retry_scid.datalen));
+    }
+  }
+
+  log->log_printf(
+      log->user_data, (NGTCP2_LOG_TP " initial_source_connection_id=0x%s"),
+      NGTCP2_LOG_TP_HD_FIELDS,
+      (const char *)ngtcp2_encode_hex(cid, params->initial_scid.data,
+                                      params->initial_scid.datalen));
+
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_TP " initial_max_stream_data_bidi_local=%" PRIu64),
+      NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_stream_data_bidi_local);
+  log->log_printf(
+      log->user_data,
+      (NGTCP2_LOG_TP " initial_max_stream_data_bidi_remote=%" PRIu64),
+      NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_stream_data_bidi_remote);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " initial_max_stream_data_uni=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_stream_data_uni);
+  log->log_printf(log->user_data, (NGTCP2_LOG_TP " initial_max_data=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_data);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " initial_max_streams_bidi=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_streams_bidi);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " initial_max_streams_uni=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->initial_max_streams_uni);
+  log->log_printf(log->user_data, (NGTCP2_LOG_TP " max_idle_timeout=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS,
+                  params->max_idle_timeout / NGTCP2_MILLISECONDS);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " max_udp_payload_size=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->max_udp_payload_size);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " ack_delay_exponent=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->ack_delay_exponent);
+  log->log_printf(log->user_data, (NGTCP2_LOG_TP " max_ack_delay=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS,
+                  params->max_ack_delay / NGTCP2_MILLISECONDS);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " active_connection_id_limit=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->active_connection_id_limit);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " disable_active_migration=%d"),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->disable_active_migration);
+  log->log_printf(log->user_data,
+                  (NGTCP2_LOG_TP " max_datagram_frame_size=%" PRIu64),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->max_datagram_frame_size);
+  log->log_printf(log->user_data, (NGTCP2_LOG_TP " grease_quic_bit=%d"),
+                  NGTCP2_LOG_TP_HD_FIELDS, params->grease_quic_bit);
+
+  if (params->version_info_present) {
+    log->log_printf(
+        log->user_data,
+        (NGTCP2_LOG_TP " version_information.chosen_version=0x%08x"),
+        NGTCP2_LOG_TP_HD_FIELDS, params->version_info.chosen_version);
+
+    assert(!(params->version_info.other_versionslen & 0x3));
+
+    for (i = 0, p = params->version_info.other_versions;
+         i < params->version_info.other_versionslen; i += sizeof(uint32_t)) {
+      p = ngtcp2_get_uint32(&version, p);
+
+      log->log_printf(
+          log->user_data,
+          (NGTCP2_LOG_TP " version_information.other_versions[%zu]=0x%08x"),
+          NGTCP2_LOG_TP_HD_FIELDS, i >> 2, version);
+    }
+  }
+}
+
+void ngtcp2_log_pkt_lost(ngtcp2_log *log, int64_t pkt_num, uint8_t type,
+                         uint8_t flags, ngtcp2_tstamp sent_ts) {
+  if (!log->log_printf) {
+    return;
+  }
+
+  ngtcp2_log_info(log, NGTCP2_LOG_EVENT_RCV,
+                  "pkn=%" PRId64 " lost type=%s sent_ts=%" PRIu64, pkt_num,
+                  strpkttype_type_flags(type, flags), sent_ts);
+}
+
+static void log_pkt_hd(ngtcp2_log *log, const ngtcp2_pkt_hd *hd,
+                       const char *dir) {
+  uint8_t dcid[sizeof(hd->dcid.data) * 2 + 1];
+  uint8_t scid[sizeof(hd->scid.data) * 2 + 1];
+
+  if (!log->log_printf) {
+    return;
+  }
+
+  if (hd->type == NGTCP2_PKT_1RTT) {
+    ngtcp2_log_info(
+        log, NGTCP2_LOG_EVENT_PKT, "%s pkn=%" PRId64 " dcid=0x%s type=%s k=%d",
+        dir, hd->pkt_num,
+        (const char *)ngtcp2_encode_hex(dcid, hd->dcid.data, hd->dcid.datalen),
+        strpkttype(hd), (hd->flags & NGTCP2_PKT_FLAG_KEY_PHASE) != 0);
+  } else {
+    ngtcp2_log_info(
+        log, NGTCP2_LOG_EVENT_PKT,
+        "%s pkn=%" PRId64 " dcid=0x%s scid=0x%s version=0x%08x type=%s len=%zu",
+        dir, hd->pkt_num,
+        (const char *)ngtcp2_encode_hex(dcid, hd->dcid.data, hd->dcid.datalen),
+        (const char *)ngtcp2_encode_hex(scid, hd->scid.data, hd->scid.datalen),
+        hd->version, strpkttype(hd), hd->len);
+  }
+}
+
+void ngtcp2_log_rx_pkt_hd(ngtcp2_log *log, const ngtcp2_pkt_hd *hd) {
+  log_pkt_hd(log, hd, "rx");
+}
+
+void ngtcp2_log_tx_pkt_hd(ngtcp2_log *log, const ngtcp2_pkt_hd *hd) {
+  log_pkt_hd(log, hd, "tx");
+}
+
+void ngtcp2_log_info(ngtcp2_log *log, ngtcp2_log_event ev, const char *fmt,
+                     ...) {
+  va_list ap;
+  int n;
+  char buf[NGTCP2_LOG_BUFLEN];
+
+  if (!log->log_printf) {
+    return;
+  }
+
+  va_start(ap, fmt);
+  n = vsnprintf(buf, sizeof(buf), fmt, ap);
+  va_end(ap);
+
+  if (n < 0 || (size_t)n >= sizeof(buf)) {
+    return;
+  }
+
+  log->log_printf(log->user_data, (NGTCP2_LOG_HD " %s"),
+                  timestamp_cast(log->last_ts - log->ts), log->scid,
+                  strevent(ev), buf);
+}
+
+void ngtcp2_log_tx_cancel(ngtcp2_log *log, const ngtcp2_pkt_hd *hd) {
+  ngtcp2_log_info(log, NGTCP2_LOG_EVENT_PKT,
+                  "cancel tx pkn=%" PRId64 " type=%s", hd->pkt_num,
+                  strpkttype(hd));
+}