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// Copyright 2014 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_address_mismatch.h"
#include "base/logging.h"
#include "net/base/ip_address.h"
#include "net/base/ip_endpoint.h"
namespace net {
int GetAddressMismatch(const IPEndPoint& first_address,
const IPEndPoint& second_address) {
if (first_address.address().empty() || second_address.address().empty()) {
return -1;
}
IPAddress first_ip_address = first_address.address();
if (first_ip_address.IsIPv4MappedIPv6()) {
first_ip_address = ConvertIPv4MappedIPv6ToIPv4(first_ip_address);
}
IPAddress second_ip_address = second_address.address();
if (second_ip_address.IsIPv4MappedIPv6()) {
second_ip_address = ConvertIPv4MappedIPv6ToIPv4(second_ip_address);
}
int sample;
if (first_ip_address != second_ip_address) {
sample = QUIC_ADDRESS_MISMATCH_BASE;
} else if (first_address.port() != second_address.port()) {
sample = QUIC_PORT_MISMATCH_BASE;
} else {
sample = QUIC_ADDRESS_AND_PORT_MATCH_BASE;
}
// Add an offset to |sample|:
// V4_V4: add 0
// V6_V6: add 1
// V4_V6: add 2
// V6_V4: add 3
bool first_ipv4 = first_ip_address.IsIPv4();
if (first_ipv4 != second_ip_address.IsIPv4()) {
CHECK_EQ(sample, QUIC_ADDRESS_MISMATCH_BASE);
sample += 2;
}
if (!first_ipv4) {
sample += 1;
}
return sample;
}
} // namespace net
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