Add QuicFramer and friends.

net/quic/quic_utils.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/quic_utils.h"
+
+#include "base/logging.h"
+
+namespace net {
+
+// static
+int QuicUtils::StreamFragmentPacketOverhead(int num_fragments) {
+  // TODO(jar): Use sizeof(some name).
+  return kPacketHeaderSize +
+         1 +   // fragment count
+         (1 +  // 8 bit type
+          2 +  // 16 bit length
+          kMinStreamFragmentLength) * num_fragments;
+}
+
+// TODO(jar): put into an anonymous namespage.
+// The following two constants are defined as part of the hash algorithm.
+// 309485009821345068724781371
+static uint128 kPrime(16777216, 315);
+// 14406626329776981559649562966706236762
+static uint128 kOffset(780984778246553632, 4400696054689967450);
+
+uint128 QuicUtils::FNV1a_128_Hash(const char* data, int len) {
+  const uint8* octets = reinterpret_cast<const uint8*>(data);
+
+  uint128 hash = kOffset;
+
+  for (int i = 0; i < len; ++i) {
+    hash  = hash ^ uint128(0, octets[i]);
+    hash = hash * kPrime;
+  }
+
+  return hash;
+}
+
+#define RETURN_STRING_LITERAL(x) \
+case x: \
+return #x;
+
+const char* QuicUtils::ErrorToString(QuicErrorCode error) {
+  switch (error) {
+    RETURN_STRING_LITERAL(QUIC_NO_ERROR);
+    RETURN_STRING_LITERAL(QUIC_STREAM_DATA_AFTER_TERMINATION);
+    RETURN_STRING_LITERAL(QUIC_SERVER_ERROR_PROCESSING_STREAM);
+    RETURN_STRING_LITERAL(QUIC_MULTIPLE_TERMINATION_OFFSETS);
+    RETURN_STRING_LITERAL(QUIC_BAD_APPLICATION_PAYLOAD);
+    RETURN_STRING_LITERAL(QUIC_INVALID_PACKET_HEADER);
+    RETURN_STRING_LITERAL(QUIC_INVALID_FRAGMENT_DATA);
+    RETURN_STRING_LITERAL(QUIC_INVALID_FEC_DATA);
+    RETURN_STRING_LITERAL(QUIC_INVALID_RST_STREAM_DATA);
+    RETURN_STRING_LITERAL(QUIC_INVALID_CONNECTION_CLOSE_DATA);
+    RETURN_STRING_LITERAL(QUIC_INVALID_ACK_DATA);
+    RETURN_STRING_LITERAL(QUIC_DECRYPTION_FAILURE);
+    RETURN_STRING_LITERAL(QUIC_ENCRYPTION_FAILURE);
+    RETURN_STRING_LITERAL(QUIC_PACKET_TOO_LARGE);
+    RETURN_STRING_LITERAL(QUIC_PACKET_FOR_NONEXISTENT_STREAM);
+    RETURN_STRING_LITERAL(QUIC_CLIENT_GOING_AWAY);
+    RETURN_STRING_LITERAL(QUIC_SERVER_GOING_AWAY);
+    RETURN_STRING_LITERAL(QUIC_CRYPTO_TAGS_OUT_OF_ORDER);
+    RETURN_STRING_LITERAL(QUIC_CRYPTO_TOO_MANY_ENTRIES);
+    RETURN_STRING_LITERAL(QUIC_CRYPTO_INVALID_VALUE_LENGTH)
+    RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE);
+    RETURN_STRING_LITERAL(QUIC_INVALID_CRYPTO_MESSAGE_TYPE);
+    RETURN_STRING_LITERAL(QUIC_INVALID_STREAM_ID);
+    RETURN_STRING_LITERAL(QUIC_TOO_MANY_OPEN_STREAMS);
+    RETURN_STRING_LITERAL(QUIC_CONNECTION_TIMED_OUT);
+    // Intentionally have no default case, so we'll break the build
+    // if we add errors and don't put them here.
+  }
+  return "";
+}
+
+}  // namespace net