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Unified Diff: net/quic/quic_utils.cc

Issue 2193073003: Move shared files in net/quic/ into net/quic/core/ (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: io_thread_unittest.cc Created 4 years, 5 months ago
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Index: net/quic/quic_utils.cc
diff --git a/net/quic/quic_utils.cc b/net/quic/quic_utils.cc
deleted file mode 100644
index 9c0ca0c1c69a39205962e21ac8f3d110e8ac6760..0000000000000000000000000000000000000000
--- a/net/quic/quic_utils.cc
+++ /dev/null
@@ -1,573 +0,0 @@
-// 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 <ctype.h>
-#include <stdint.h>
-
-#include <algorithm>
-#include <vector>
-
-#include "base/containers/adapters.h"
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "base/strings/stringprintf.h"
-#include "net/base/ip_address.h"
-#include "net/quic/quic_flags.h"
-#include "net/quic/quic_write_blocked_list.h"
-
-using base::StringPiece;
-using std::string;
-
-namespace net {
-namespace {
-
-// We know that >= GCC 4.8 and Clang have a __uint128_t intrinsic. Other
-// compilers don't necessarily, notably MSVC.
-#if defined(__x86_64__) && \
- ((defined(__GNUC__) && \
- (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))) || \
- defined(__clang__))
-#define QUIC_UTIL_HAS_UINT128 1
-#endif
-
-#ifdef QUIC_UTIL_HAS_UINT128
-uint128 IncrementalHashFast(uint128 uhash, const char* data, size_t len) {
- // This code ends up faster than the naive implementation for 2 reasons:
- // 1. uint128 from base/int128.h is sufficiently complicated that the compiler
- // cannot transform the multiplication by kPrime into a shift-multiply-add;
- // it has go through all of the instructions for a 128-bit multiply.
- // 2. Because there are so fewer instructions (around 13), the hot loop fits
- // nicely in the instruction queue of many Intel CPUs.
- // kPrime = 309485009821345068724781371
- static const __uint128_t kPrime =
- (static_cast<__uint128_t>(16777216) << 64) + 315;
- __uint128_t xhash = (static_cast<__uint128_t>(Uint128High64(uhash)) << 64) +
- Uint128Low64(uhash);
- const uint8_t* octets = reinterpret_cast<const uint8_t*>(data);
- for (size_t i = 0; i < len; ++i) {
- xhash = (xhash ^ octets[i]) * kPrime;
- }
- return uint128(static_cast<uint64_t>(xhash >> 64),
- static_cast<uint64_t>(xhash & UINT64_C(0xFFFFFFFFFFFFFFFF)));
-}
-#endif
-
-#ifndef QUIC_UTIL_HAS_UINT128
-// Slow implementation of IncrementalHash. In practice, only used by Chromium.
-uint128 IncrementalHashSlow(uint128 hash, const char* data, size_t len) {
- // kPrime = 309485009821345068724781371
- static const uint128 kPrime(16777216, 315);
- const uint8_t* octets = reinterpret_cast<const uint8_t*>(data);
- for (size_t i = 0; i < len; ++i) {
- hash = hash ^ uint128(0, octets[i]);
- hash = hash * kPrime;
- }
- return hash;
-}
-#endif
-
-uint128 IncrementalHash(uint128 hash, const char* data, size_t len) {
-#ifdef QUIC_UTIL_HAS_UINT128
- return IncrementalHashFast(hash, data, len);
-#else
- return IncrementalHashSlow(hash, data, len);
-#endif
-}
-
-bool IsInitializedIPEndPoint(const IPEndPoint& address) {
- return address.address().IsValid();
-}
-
-} // namespace
-
-// static
-uint64_t QuicUtils::FNV1a_64_Hash(const char* data, int len) {
- static const uint64_t kOffset = UINT64_C(14695981039346656037);
- static const uint64_t kPrime = UINT64_C(1099511628211);
-
- const uint8_t* octets = reinterpret_cast<const uint8_t*>(data);
-
- uint64_t hash = kOffset;
-
- for (int i = 0; i < len; ++i) {
- hash = hash ^ octets[i];
- hash = hash * kPrime;
- }
-
- return hash;
-}
-
-// static
-uint128 QuicUtils::FNV1a_128_Hash(const char* data, int len) {
- return FNV1a_128_Hash_Two(data, len, nullptr, 0);
-}
-
-// static
-uint128 QuicUtils::FNV1a_128_Hash_Two(const char* data1,
- int len1,
- const char* data2,
- int len2) {
- // The two constants are defined as part of the hash algorithm.
- // see http://www.isthe.com/chongo/tech/comp/fnv/
- // kOffset = 144066263297769815596495629667062367629
- const uint128 kOffset(UINT64_C(7809847782465536322),
- UINT64_C(7113472399480571277));
-
- uint128 hash = IncrementalHash(kOffset, data1, len1);
- if (data2 == nullptr) {
- return hash;
- }
- return IncrementalHash(hash, data2, len2);
-}
-
-// static
-bool QuicUtils::FindMutualTag(const QuicTagVector& our_tags_vector,
- const QuicTag* their_tags,
- size_t num_their_tags,
- Priority priority,
- QuicTag* out_result,
- size_t* out_index) {
- if (our_tags_vector.empty()) {
- return false;
- }
- const size_t num_our_tags = our_tags_vector.size();
- const QuicTag* our_tags = &our_tags_vector[0];
-
- size_t num_priority_tags, num_inferior_tags;
- const QuicTag* priority_tags;
- const QuicTag* inferior_tags;
- if (priority == LOCAL_PRIORITY) {
- num_priority_tags = num_our_tags;
- priority_tags = our_tags;
- num_inferior_tags = num_their_tags;
- inferior_tags = their_tags;
- } else {
- num_priority_tags = num_their_tags;
- priority_tags = their_tags;
- num_inferior_tags = num_our_tags;
- inferior_tags = our_tags;
- }
-
- for (size_t i = 0; i < num_priority_tags; i++) {
- for (size_t j = 0; j < num_inferior_tags; j++) {
- if (priority_tags[i] == inferior_tags[j]) {
- *out_result = priority_tags[i];
- if (out_index) {
- if (priority == LOCAL_PRIORITY) {
- *out_index = j;
- } else {
- *out_index = i;
- }
- }
- return true;
- }
- }
- }
-
- return false;
-}
-
-// static
-void QuicUtils::SerializeUint128Short(uint128 v, uint8_t* out) {
- const uint64_t lo = Uint128Low64(v);
- const uint64_t hi = Uint128High64(v);
- // This assumes that the system is little-endian.
- memcpy(out, &lo, sizeof(lo));
- memcpy(out + sizeof(lo), &hi, sizeof(hi) / 2);
-}
-
-#define RETURN_STRING_LITERAL(x) \
- case x: \
- return #x;
-
-// static
-const char* QuicUtils::StreamErrorToString(QuicRstStreamErrorCode error) {
- switch (error) {
- RETURN_STRING_LITERAL(QUIC_STREAM_NO_ERROR);
- RETURN_STRING_LITERAL(QUIC_STREAM_CONNECTION_ERROR);
- RETURN_STRING_LITERAL(QUIC_ERROR_PROCESSING_STREAM);
- RETURN_STRING_LITERAL(QUIC_MULTIPLE_TERMINATION_OFFSETS);
- RETURN_STRING_LITERAL(QUIC_BAD_APPLICATION_PAYLOAD);
- RETURN_STRING_LITERAL(QUIC_STREAM_PEER_GOING_AWAY);
- RETURN_STRING_LITERAL(QUIC_STREAM_CANCELLED);
- RETURN_STRING_LITERAL(QUIC_RST_ACKNOWLEDGEMENT);
- RETURN_STRING_LITERAL(QUIC_REFUSED_STREAM);
- RETURN_STRING_LITERAL(QUIC_STREAM_LAST_ERROR);
- RETURN_STRING_LITERAL(QUIC_INVALID_PROMISE_URL);
- RETURN_STRING_LITERAL(QUIC_UNAUTHORIZED_PROMISE_URL);
- RETURN_STRING_LITERAL(QUIC_DUPLICATE_PROMISE_URL);
- RETURN_STRING_LITERAL(QUIC_PROMISE_VARY_MISMATCH);
- RETURN_STRING_LITERAL(QUIC_INVALID_PROMISE_METHOD);
- }
- // Return a default value so that we return this when |error| doesn't match
- // any of the QuicRstStreamErrorCodes. This can happen when the RstStream
- // frame sent by the peer (attacker) has invalid error code.
- return "INVALID_RST_STREAM_ERROR_CODE";
-}
-
-// static
-const char* QuicUtils::ErrorToString(QuicErrorCode error) {
- switch (error) {
- RETURN_STRING_LITERAL(QUIC_NO_ERROR);
- RETURN_STRING_LITERAL(QUIC_INTERNAL_ERROR);
- RETURN_STRING_LITERAL(QUIC_STREAM_DATA_AFTER_TERMINATION);
- RETURN_STRING_LITERAL(QUIC_INVALID_PACKET_HEADER);
- RETURN_STRING_LITERAL(QUIC_INVALID_FRAME_DATA);
- RETURN_STRING_LITERAL(QUIC_MISSING_PAYLOAD);
- RETURN_STRING_LITERAL(QUIC_INVALID_FEC_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_OVERLAPPING_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_UNENCRYPTED_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_RST_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_CONNECTION_CLOSE_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_GOAWAY_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_WINDOW_UPDATE_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_BLOCKED_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_STOP_WAITING_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_PATH_CLOSE_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_ACK_DATA);
- RETURN_STRING_LITERAL(QUIC_INVALID_VERSION_NEGOTIATION_PACKET);
- RETURN_STRING_LITERAL(QUIC_INVALID_PUBLIC_RST_PACKET);
- RETURN_STRING_LITERAL(QUIC_DECRYPTION_FAILURE);
- RETURN_STRING_LITERAL(QUIC_ENCRYPTION_FAILURE);
- RETURN_STRING_LITERAL(QUIC_PACKET_TOO_LARGE);
- RETURN_STRING_LITERAL(QUIC_PEER_GOING_AWAY);
- RETURN_STRING_LITERAL(QUIC_HANDSHAKE_FAILED);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_TAGS_OUT_OF_ORDER);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_TOO_MANY_ENTRIES);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_TOO_MANY_REJECTS);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_INVALID_VALUE_LENGTH)
- RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_INTERNAL_ERROR);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_VERSION_NOT_SUPPORTED);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_NO_SUPPORT);
- RETURN_STRING_LITERAL(QUIC_INVALID_CRYPTO_MESSAGE_TYPE);
- RETURN_STRING_LITERAL(QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_PARAMETER_NO_OVERLAP);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_INDEX_NOT_FOUND);
- RETURN_STRING_LITERAL(QUIC_INVALID_STREAM_ID);
- RETURN_STRING_LITERAL(QUIC_INVALID_PRIORITY);
- RETURN_STRING_LITERAL(QUIC_TOO_MANY_OPEN_STREAMS);
- RETURN_STRING_LITERAL(QUIC_PUBLIC_RESET);
- RETURN_STRING_LITERAL(QUIC_INVALID_VERSION);
- RETURN_STRING_LITERAL(QUIC_INVALID_HEADER_ID);
- RETURN_STRING_LITERAL(QUIC_INVALID_NEGOTIATED_VALUE);
- RETURN_STRING_LITERAL(QUIC_DECOMPRESSION_FAILURE);
- RETURN_STRING_LITERAL(QUIC_NETWORK_IDLE_TIMEOUT);
- RETURN_STRING_LITERAL(QUIC_HANDSHAKE_TIMEOUT);
- RETURN_STRING_LITERAL(QUIC_ERROR_MIGRATING_ADDRESS);
- RETURN_STRING_LITERAL(QUIC_ERROR_MIGRATING_PORT);
- RETURN_STRING_LITERAL(QUIC_PACKET_WRITE_ERROR);
- RETURN_STRING_LITERAL(QUIC_PACKET_READ_ERROR);
- RETURN_STRING_LITERAL(QUIC_EMPTY_STREAM_FRAME_NO_FIN);
- RETURN_STRING_LITERAL(QUIC_INVALID_HEADERS_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_FLOW_CONTROL_RECEIVED_TOO_MUCH_DATA);
- RETURN_STRING_LITERAL(QUIC_FLOW_CONTROL_SENT_TOO_MUCH_DATA);
- RETURN_STRING_LITERAL(QUIC_FLOW_CONTROL_INVALID_WINDOW);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_IP_POOLED);
- RETURN_STRING_LITERAL(QUIC_PROOF_INVALID);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_DUPLICATE_TAG);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_ENCRYPTION_LEVEL_INCORRECT);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_SERVER_CONFIG_EXPIRED);
- RETURN_STRING_LITERAL(QUIC_INVALID_CHANNEL_ID_SIGNATURE);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_SYMMETRIC_KEY_SETUP_FAILED);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_MESSAGE_WHILE_VALIDATING_CLIENT_HELLO);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_UPDATE_BEFORE_HANDSHAKE_COMPLETE);
- RETURN_STRING_LITERAL(QUIC_VERSION_NEGOTIATION_MISMATCH);
- RETURN_STRING_LITERAL(QUIC_TOO_MANY_OUTSTANDING_SENT_PACKETS);
- RETURN_STRING_LITERAL(QUIC_TOO_MANY_OUTSTANDING_RECEIVED_PACKETS);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_CANCELLED);
- RETURN_STRING_LITERAL(QUIC_BAD_PACKET_LOSS_RATE);
- RETURN_STRING_LITERAL(QUIC_PUBLIC_RESETS_POST_HANDSHAKE);
- RETURN_STRING_LITERAL(QUIC_TIMEOUTS_WITH_OPEN_STREAMS);
- RETURN_STRING_LITERAL(QUIC_FAILED_TO_SERIALIZE_PACKET);
- RETURN_STRING_LITERAL(QUIC_TOO_MANY_AVAILABLE_STREAMS);
- RETURN_STRING_LITERAL(QUIC_UNENCRYPTED_FEC_DATA);
- RETURN_STRING_LITERAL(QUIC_BAD_MULTIPATH_FLAG);
- RETURN_STRING_LITERAL(QUIC_IP_ADDRESS_CHANGED);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NO_MIGRATABLE_STREAMS);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_TOO_MANY_CHANGES);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NO_NEW_NETWORK);
- RETURN_STRING_LITERAL(QUIC_CONNECTION_MIGRATION_NON_MIGRATABLE_STREAM);
- RETURN_STRING_LITERAL(QUIC_TOO_MANY_RTOS);
- RETURN_STRING_LITERAL(QUIC_ATTEMPT_TO_SEND_UNENCRYPTED_STREAM_DATA);
- RETURN_STRING_LITERAL(QUIC_MAYBE_CORRUPTED_MEMORY);
- RETURN_STRING_LITERAL(QUIC_CRYPTO_CHLO_TOO_LARGE);
- RETURN_STRING_LITERAL(QUIC_MULTIPATH_PATH_DOES_NOT_EXIST);
- RETURN_STRING_LITERAL(QUIC_MULTIPATH_PATH_NOT_ACTIVE);
- RETURN_STRING_LITERAL(QUIC_LAST_ERROR);
- // Intentionally have no default case, so we'll break the build
- // if we add errors and don't put them here.
- }
- // Return a default value so that we return this when |error| doesn't match
- // any of the QuicErrorCodes. This can happen when the ConnectionClose
- // frame sent by the peer (attacker) has invalid error code.
- return "INVALID_ERROR_CODE";
-}
-
-// static
-const char* QuicUtils::EncryptionLevelToString(EncryptionLevel level) {
- switch (level) {
- RETURN_STRING_LITERAL(ENCRYPTION_NONE);
- RETURN_STRING_LITERAL(ENCRYPTION_INITIAL);
- RETURN_STRING_LITERAL(ENCRYPTION_FORWARD_SECURE);
- RETURN_STRING_LITERAL(NUM_ENCRYPTION_LEVELS);
- }
- return "INVALID_ENCRYPTION_LEVEL";
-}
-
-// static
-const char* QuicUtils::TransmissionTypeToString(TransmissionType type) {
- switch (type) {
- RETURN_STRING_LITERAL(NOT_RETRANSMISSION);
- RETURN_STRING_LITERAL(HANDSHAKE_RETRANSMISSION);
- RETURN_STRING_LITERAL(LOSS_RETRANSMISSION);
- RETURN_STRING_LITERAL(ALL_UNACKED_RETRANSMISSION);
- RETURN_STRING_LITERAL(ALL_INITIAL_RETRANSMISSION);
- RETURN_STRING_LITERAL(RTO_RETRANSMISSION);
- RETURN_STRING_LITERAL(TLP_RETRANSMISSION);
- }
- return "INVALID_TRANSMISSION_TYPE";
-}
-
-// static
-string QuicUtils::TagToString(QuicTag tag) {
- char chars[sizeof tag];
- bool ascii = true;
- const QuicTag orig_tag = tag;
-
- for (size_t i = 0; i < arraysize(chars); i++) {
- chars[i] = static_cast<char>(tag);
- if ((chars[i] == 0 || chars[i] == '\xff') && i == arraysize(chars) - 1) {
- chars[i] = ' ';
- }
- if (!isprint(static_cast<unsigned char>(chars[i]))) {
- ascii = false;
- break;
- }
- tag >>= 8;
- }
-
- if (ascii) {
- return string(chars, sizeof(chars));
- }
-
- return base::UintToString(orig_tag);
-}
-
-// static
-QuicTagVector QuicUtils::ParseQuicConnectionOptions(
- const std::string& connection_options) {
- QuicTagVector options;
- // Tokens are expected to be no more than 4 characters long, but we
- // handle overflow gracefully.
- for (const base::StringPiece& token :
- base::SplitStringPiece(connection_options, ",", base::TRIM_WHITESPACE,
- base::SPLIT_WANT_ALL)) {
- uint32_t option = 0;
- for (char token_char : base::Reversed(token)) {
- option <<= 8;
- option |= static_cast<unsigned char>(token_char);
- }
- options.push_back(option);
- }
- return options;
-}
-
-string QuicUtils::PeerAddressChangeTypeToString(PeerAddressChangeType type) {
- switch (type) {
- RETURN_STRING_LITERAL(NO_CHANGE);
- RETURN_STRING_LITERAL(PORT_CHANGE);
- RETURN_STRING_LITERAL(IPV4_SUBNET_CHANGE);
- RETURN_STRING_LITERAL(IPV4_TO_IPV6_CHANGE);
- RETURN_STRING_LITERAL(IPV6_TO_IPV4_CHANGE);
- RETURN_STRING_LITERAL(IPV6_TO_IPV6_CHANGE);
- RETURN_STRING_LITERAL(UNSPECIFIED_CHANGE);
- }
- return "INVALID_PEER_ADDRESS_CHANGE_TYPE";
-}
-
-// static
-void QuicUtils::DeleteFrames(QuicFrames* frames) {
- for (QuicFrame& frame : *frames) {
- switch (frame.type) {
- // Frames smaller than a pointer are inlined, so don't need to be deleted.
- case PADDING_FRAME:
- case MTU_DISCOVERY_FRAME:
- case PING_FRAME:
- break;
- case STREAM_FRAME:
- delete frame.stream_frame;
- break;
- case ACK_FRAME:
- delete frame.ack_frame;
- break;
- case STOP_WAITING_FRAME:
- delete frame.stop_waiting_frame;
- break;
- case RST_STREAM_FRAME:
- delete frame.rst_stream_frame;
- break;
- case CONNECTION_CLOSE_FRAME:
- delete frame.connection_close_frame;
- break;
- case GOAWAY_FRAME:
- delete frame.goaway_frame;
- break;
- case BLOCKED_FRAME:
- delete frame.blocked_frame;
- break;
- case WINDOW_UPDATE_FRAME:
- delete frame.window_update_frame;
- break;
- case PATH_CLOSE_FRAME:
- delete frame.path_close_frame;
- break;
- case NUM_FRAME_TYPES:
- DCHECK(false) << "Cannot delete type: " << frame.type;
- }
- }
- frames->clear();
-}
-
-// static
-void QuicUtils::RemoveFramesForStream(QuicFrames* frames,
- QuicStreamId stream_id) {
- QuicFrames::iterator it = frames->begin();
- while (it != frames->end()) {
- if (it->type != STREAM_FRAME || it->stream_frame->stream_id != stream_id) {
- ++it;
- continue;
- }
- delete it->stream_frame;
- it = frames->erase(it);
- }
-}
-
-// static
-void QuicUtils::ClearSerializedPacket(SerializedPacket* serialized_packet) {
- if (!serialized_packet->retransmittable_frames.empty()) {
- DeleteFrames(&serialized_packet->retransmittable_frames);
- }
- serialized_packet->encrypted_buffer = nullptr;
- serialized_packet->encrypted_length = 0;
-}
-
-// static
-uint64_t QuicUtils::PackPathIdAndPacketNumber(QuicPathId path_id,
- QuicPacketNumber packet_number) {
- // Setting the nonce below relies on QuicPathId and QuicPacketNumber being
- // specific sizes.
- static_assert(sizeof(path_id) == 1, "Size of QuicPathId changed.");
- static_assert(sizeof(packet_number) == 8,
- "Size of QuicPacketNumber changed.");
- // Use path_id and lower 7 bytes of packet_number as lower 8 bytes of nonce.
- uint64_t path_id_packet_number =
- (static_cast<uint64_t>(path_id) << 56) | packet_number;
- DCHECK(path_id != kDefaultPathId || path_id_packet_number == packet_number);
- return path_id_packet_number;
-}
-
-// static
-char* QuicUtils::CopyBuffer(const SerializedPacket& packet) {
- char* dst_buffer = new char[packet.encrypted_length];
- memcpy(dst_buffer, packet.encrypted_buffer, packet.encrypted_length);
- return dst_buffer;
-}
-
-// static
-PeerAddressChangeType QuicUtils::DetermineAddressChangeType(
- const IPEndPoint& old_address,
- const IPEndPoint& new_address) {
- if (!IsInitializedIPEndPoint(old_address) ||
- !IsInitializedIPEndPoint(new_address) || old_address == new_address) {
- return NO_CHANGE;
- }
-
- if (old_address.address() == new_address.address()) {
- return PORT_CHANGE;
- }
-
- bool old_ip_is_ipv4 = old_address.address().IsIPv4();
- bool migrating_ip_is_ipv4 = new_address.address().IsIPv4();
- if (old_ip_is_ipv4 && !migrating_ip_is_ipv4) {
- return IPV4_TO_IPV6_CHANGE;
- }
-
- if (!old_ip_is_ipv4) {
- return migrating_ip_is_ipv4 ? IPV6_TO_IPV4_CHANGE : IPV6_TO_IPV6_CHANGE;
- }
-
- if (IPAddressMatchesPrefix(old_address.address(), new_address.address(),
- 24)) {
- // Subnet part does not change (here, we use /24), which is considered to be
- // caused by NATs.
- return IPV4_SUBNET_CHANGE;
- }
-
- return UNSPECIFIED_CHANGE;
-}
-
-string QuicUtils::HexEncode(const char* data, size_t length) {
- return HexEncode(StringPiece(data, length));
-}
-
-string QuicUtils::HexEncode(StringPiece data) {
- return ::base::HexEncode(data.data(), data.size());
-}
-
-string QuicUtils::HexDecode(const char* data, size_t length) {
- return HexDecode(StringPiece(data, length));
-}
-
-string QuicUtils::HexDecode(StringPiece data) {
- if (data.empty())
- return "";
- std::vector<uint8_t> v;
- if (!base::HexStringToBytes(data.as_string(), &v))
- return "";
- string out;
- if (!v.empty())
- out.assign(reinterpret_cast<const char*>(&v[0]), v.size());
- return out;
-}
-
-string QuicUtils::HexDump(StringPiece binary_input) {
- int offset = 0;
- const int kBytesPerLine = 16; // Max bytes dumped per line
- const char* buf = binary_input.data();
- int bytes_remaining = binary_input.size();
- string s; // our output
- const char* p = buf;
- while (bytes_remaining > 0) {
- const int line_bytes = std::min(bytes_remaining, kBytesPerLine);
- base::StringAppendF(&s, "0x%04x: ", offset); // Do the line header
- for (int i = 0; i < kBytesPerLine; ++i) {
- if (i < line_bytes) {
- base::StringAppendF(&s, "%02x", static_cast<unsigned char>(p[i]));
- } else {
- s += " "; // two-space filler instead of two-space hex digits
- }
- if (i % 2)
- s += ' ';
- }
- s += ' ';
- for (int i = 0; i < line_bytes; ++i) { // Do the ASCII dump
- s += (p[i] > 32 && p[i] < 127) ? p[i] : '.';
- }
-
- bytes_remaining -= line_bytes;
- offset += line_bytes;
- p += line_bytes;
- s += '\n';
- }
- return s;
-}
-
-} // namespace net
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