1 files changed, 298 insertions, 0 deletions
diff --git a/examples/debug.cc b/examples/debug.cc
new file mode 100644
index 0000000..98561fb
--- /dev/null
+++ b/examples/debug.cc
@@ -0,0 +1,298 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2017 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 "debug.h"
+
+#include <cassert>
+#include <random>
+#include <iostream>
+
+#include "util.h"
+
+using namespace std::literals;
+
+namespace ngtcp2 {
+
+namespace debug {
+
+namespace {
+auto randgen = util::make_mt19937();
+} // namespace
+
+namespace {
+auto *outfile = stderr;
+} // namespace
+
+int handshake_completed(ngtcp2_conn *conn, void *user_data) {
+  fprintf(outfile, "QUIC handshake has completed\n");
+  return 0;
+}
+
+int handshake_confirmed(ngtcp2_conn *conn, void *user_data) {
+  fprintf(outfile, "QUIC handshake has been confirmed\n");
+  return 0;
+}
+
+bool packet_lost(double prob) {
+  auto p = std::uniform_real_distribution<>(0, 1)(randgen);
+  return p < prob;
+}
+
+void print_crypto_data(ngtcp2_crypto_level crypto_level, const uint8_t *data,
+                       size_t datalen) {
+  const char *crypto_level_str;
+  switch (crypto_level) {
+  case NGTCP2_CRYPTO_LEVEL_INITIAL:
+    crypto_level_str = "Initial";
+    break;
+  case NGTCP2_CRYPTO_LEVEL_HANDSHAKE:
+    crypto_level_str = "Handshake";
+    break;
+  case NGTCP2_CRYPTO_LEVEL_APPLICATION:
+    crypto_level_str = "Application";
+    break;
+  default:
+    assert(0);
+    abort();
+  }
+  fprintf(outfile, "Ordered CRYPTO data in %s crypto level\n",
+          crypto_level_str);
+  util::hexdump(outfile, data, datalen);
+}
+
+void print_stream_data(int64_t stream_id, const uint8_t *data, size_t datalen) {
+  fprintf(outfile, "Ordered STREAM data stream_id=0x%" PRIx64 "\n", stream_id);
+  util::hexdump(outfile, data, datalen);
+}
+
+void print_initial_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "initial_secret=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_client_in_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "client_in_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_server_in_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "server_in_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_handshake_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "handshake_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_client_hs_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "client_hs_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_server_hs_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "server_hs_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_client_0rtt_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "client_0rtt_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_client_1rtt_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "client_1rtt_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_server_1rtt_secret(const uint8_t *data, size_t len) {
+  fprintf(outfile, "server_1rtt_secret=%s\n",
+          util::format_hex(data, len).c_str());
+}
+
+void print_client_pp_key(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ client_pp_key=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_server_pp_key(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ server_pp_key=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_client_pp_iv(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ client_pp_iv=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_server_pp_iv(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ server_pp_iv=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_client_pp_hp(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ client_pp_hp=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_server_pp_hp(const uint8_t *data, size_t len) {
+  fprintf(outfile, "+ server_pp_hp=%s\n", util::format_hex(data, len).c_str());
+}
+
+void print_secrets(const uint8_t *secret, size_t secretlen, const uint8_t *key,
+                   size_t keylen, const uint8_t *iv, size_t ivlen,
+                   const uint8_t *hp, size_t hplen) {
+  std::cerr << "+ secret=" << util::format_hex(secret, secretlen) << "\n"
+            << "+ key=" << util::format_hex(key, keylen) << "\n"
+            << "+ iv=" << util::format_hex(iv, ivlen) << "\n"
+            << "+ hp=" << util::format_hex(hp, hplen) << std::endl;
+}
+
+void print_secrets(const uint8_t *secret, size_t secretlen, const uint8_t *key,
+                   size_t keylen, const uint8_t *iv, size_t ivlen) {
+  std::cerr << "+ secret=" << util::format_hex(secret, secretlen) << "\n"
+            << "+ key=" << util::format_hex(key, keylen) << "\n"
+            << "+ iv=" << util::format_hex(iv, ivlen) << std::endl;
+}
+
+void print_hp_mask(const uint8_t *mask, size_t masklen, const uint8_t *sample,
+                   size_t samplelen) {
+  fprintf(outfile, "mask=%s sample=%s\n",
+          util::format_hex(mask, masklen).c_str(),
+          util::format_hex(sample, samplelen).c_str());
+}
+
+void log_printf(void *user_data, const char *fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  vfprintf(stderr, fmt, ap);
+  va_end(ap);
+
+  fprintf(stderr, "\n");
+}
+
+void path_validation(const ngtcp2_path *path,
+                     ngtcp2_path_validation_result res) {
+  auto local_addr = util::straddr(
+      reinterpret_cast<sockaddr *>(path->local.addr), path->local.addrlen);
+  auto remote_addr = util::straddr(
+      reinterpret_cast<sockaddr *>(path->remote.addr), path->remote.addrlen);
+
+  std::cerr << "Path validation against path {local:" << local_addr
+            << ", remote:" << remote_addr << "} "
+            << (res == NGTCP2_PATH_VALIDATION_RESULT_SUCCESS ? "succeeded"
+                                                             : "failed")
+            << std::endl;
+}
+
+void print_http_begin_request_headers(int64_t stream_id) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " request headers started\n",
+          stream_id);
+}
+
+void print_http_begin_response_headers(int64_t stream_id) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " response headers started\n",
+          stream_id);
+}
+
+namespace {
+void print_header(const uint8_t *name, size_t namelen, const uint8_t *value,
+                  size_t valuelen, uint8_t flags) {
+  fprintf(outfile, "[%.*s: %.*s]%s\n", static_cast<int>(namelen), name,
+          static_cast<int>(valuelen), value,
+          (flags & NGHTTP3_NV_FLAG_NEVER_INDEX) ? "(sensitive)" : "");
+}
+} // namespace
+
+namespace {
+void print_header(const nghttp3_rcbuf *name, const nghttp3_rcbuf *value,
+                  uint8_t flags) {
+  auto namebuf = nghttp3_rcbuf_get_buf(name);
+  auto valuebuf = nghttp3_rcbuf_get_buf(value);
+  print_header(namebuf.base, namebuf.len, valuebuf.base, valuebuf.len, flags);
+}
+} // namespace
+
+namespace {
+void print_header(const nghttp3_nv &nv) {
+  print_header(nv.name, nv.namelen, nv.value, nv.valuelen, nv.flags);
+}
+} // namespace
+
+void print_http_header(int64_t stream_id, const nghttp3_rcbuf *name,
+                       const nghttp3_rcbuf *value, uint8_t flags) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " ", stream_id);
+  print_header(name, value, flags);
+}
+
+void print_http_end_headers(int64_t stream_id) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " headers ended\n", stream_id);
+}
+
+void print_http_data(int64_t stream_id, const uint8_t *data, size_t datalen) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " body %zu bytes\n", stream_id,
+          datalen);
+  util::hexdump(outfile, data, datalen);
+}
+
+void print_http_begin_trailers(int64_t stream_id) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " trailers started\n", stream_id);
+}
+
+void print_http_end_trailers(int64_t stream_id) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " trailers ended\n", stream_id);
+}
+
+void print_http_request_headers(int64_t stream_id, const nghttp3_nv *nva,
+                                size_t nvlen) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " submit request headers\n",
+          stream_id);
+  for (size_t i = 0; i < nvlen; ++i) {
+    auto &nv = nva[i];
+    print_header(nv);
+  }
+}
+
+void print_http_response_headers(int64_t stream_id, const nghttp3_nv *nva,
+                                 size_t nvlen) {
+  fprintf(outfile, "http: stream 0x%" PRIx64 " submit response headers\n",
+          stream_id);
+  for (size_t i = 0; i < nvlen; ++i) {
+    auto &nv = nva[i];
+    print_header(nv);
+  }
+}
+
+std::string_view secret_title(ngtcp2_crypto_level level) {
+  switch (level) {
+  case NGTCP2_CRYPTO_LEVEL_EARLY:
+    return "early_traffic"sv;
+  case NGTCP2_CRYPTO_LEVEL_HANDSHAKE:
+    return "handshake_traffic"sv;
+  case NGTCP2_CRYPTO_LEVEL_APPLICATION:
+    return "application_traffic"sv;
+  default:
+    assert(0);
+    abort();
+  }
+}
+
+} // namespace debug
+
+} // namespace ngtcp2