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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/quic/quic_address_mismatch.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "net/base/ip_endpoint.h" | |
| 9 | |
| 10 namespace net { | |
| 11 | |
| 12 int GetAddressMismatch(const IPEndPoint& first_address, | |
| 13 const IPEndPoint& second_address) { | |
| 14 if (first_address.address().empty() || second_address.address().empty()) { | |
| 15 return -1; | |
| 16 } | |
| 17 IPAddressNumber first_ip_address = first_address.address(); | |
| 18 if (IsIPv4Mapped(first_ip_address)) { | |
| 19 first_ip_address = ConvertIPv4MappedToIPv4(first_ip_address); | |
| 20 } | |
| 21 IPAddressNumber second_ip_address = second_address.address(); | |
| 22 if (IsIPv4Mapped(second_ip_address)) { | |
| 23 second_ip_address = ConvertIPv4MappedToIPv4(second_ip_address); | |
| 24 } | |
| 25 | |
| 26 int sample; | |
| 27 if (first_ip_address != second_ip_address) { | |
| 28 sample = QUIC_ADDRESS_MISMATCH_BASE; | |
| 29 } else if (first_address.port() != second_address.port()) { | |
| 30 sample = QUIC_PORT_MISMATCH_BASE; | |
| 31 } else { | |
| 32 sample = QUIC_ADDRESS_AND_PORT_MATCH_BASE; | |
| 33 } | |
| 34 | |
| 35 // Add an offset to |sample|: | |
| 36 // V4_V4: add 0 | |
| 37 // V6_V6: add 1 | |
| 38 // V4_V6: add 2 | |
| 39 // V6_V4: add 3 | |
| 40 bool first_ipv4 = (first_ip_address.size() == kIPv4AddressSize); | |
| 41 bool second_ipv4 = (second_ip_address.size() == kIPv4AddressSize); | |
| 42 if (first_ipv4 != second_ipv4) { | |
| 43 CHECK_EQ(sample, QUIC_ADDRESS_MISMATCH_BASE); | |
| 44 sample += 2; | |
| 45 } | |
| 46 if (!first_ipv4) { | |
| 47 sample += 1; | |
| 48 } | |
| 49 return sample; | |
| 50 } | |
| 51 | |
| 52 } // namespace net | |
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