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// 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.
#ifndef NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
#define NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
#include <stdint.h>
#include "base/logging.h"
#include "base/macros.h"
namespace net {
// Status flags for SSLInfo::connection_status.
enum {
// The lower 16 bits are reserved for the TLS ciphersuite id.
SSL_CONNECTION_CIPHERSUITE_MASK = 0xffff,
// The next two bits are reserved for the compression used.
SSL_CONNECTION_COMPRESSION_SHIFT = 16,
SSL_CONNECTION_COMPRESSION_MASK = 3,
// We fell back to an older protocol version for this connection.
SSL_CONNECTION_VERSION_FALLBACK = 1 << 18,
// The server doesn't support the renegotiation_info extension. If this bit
// is not set then either the extension isn't supported, or we don't have any
// knowledge either way. (The latter case will occur when we use an SSL
// library that doesn't report it, like SChannel.)
SSL_CONNECTION_NO_RENEGOTIATION_EXTENSION = 1 << 19,
// The next three bits are reserved for the SSL version.
SSL_CONNECTION_VERSION_SHIFT = 20,
SSL_CONNECTION_VERSION_MASK = 7,
// 1 << 31 (the sign bit) is reserved so that the SSL connection status will
// never be negative.
};
// NOTE: the SSL version enum constants must be between 0 and
// SSL_CONNECTION_VERSION_MASK, inclusive. These values are persisted to disk
// and used in UMA, so they must remain stable.
enum {
SSL_CONNECTION_VERSION_UNKNOWN = 0, // Unknown SSL version.
SSL_CONNECTION_VERSION_SSL2 = 1,
SSL_CONNECTION_VERSION_SSL3 = 2,
SSL_CONNECTION_VERSION_TLS1 = 3,
SSL_CONNECTION_VERSION_TLS1_1 = 4,
SSL_CONNECTION_VERSION_TLS1_2 = 5,
// Reserve 6 for TLS 1.3.
SSL_CONNECTION_VERSION_QUIC = 7,
SSL_CONNECTION_VERSION_MAX,
};
static_assert(SSL_CONNECTION_VERSION_MAX - 1 <= SSL_CONNECTION_VERSION_MASK,
"SSL_CONNECTION_VERSION_MASK too small");
inline uint16_t SSLConnectionStatusToCipherSuite(int connection_status) {
return static_cast<uint16_t>(connection_status);
}
inline int SSLConnectionStatusToVersion(int connection_status) {
return (connection_status >> SSL_CONNECTION_VERSION_SHIFT) &
SSL_CONNECTION_VERSION_MASK;
}
inline void SSLConnectionStatusSetCipherSuite(uint16_t cipher_suite,
int* connection_status) {
// Clear out the old ciphersuite.
*connection_status &= ~SSL_CONNECTION_CIPHERSUITE_MASK;
// Set the new ciphersuite.
*connection_status |= cipher_suite;
}
inline void SSLConnectionStatusSetVersion(int version, int* connection_status) {
DCHECK_GT(version, 0);
DCHECK_LT(version, SSL_CONNECTION_VERSION_MAX);
// Clear out the old version.
*connection_status &=
~(SSL_CONNECTION_VERSION_MASK << SSL_CONNECTION_VERSION_SHIFT);
// Set the new version.
*connection_status |=
((version & SSL_CONNECTION_VERSION_MASK) << SSL_CONNECTION_VERSION_SHIFT);
}
} // namespace net
#endif // NET_SSL_SSL_CONNECTION_STATUS_FLAGS_H_
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