src/net/quic/quic_address_mismatch.cc

   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
  18   int sample;
  19   if (first_address.address() != second_address.address()) {
  20     sample = QUIC_ADDRESS_MISMATCH_BASE;
  21   } else if (first_address.port() != second_address.port()) {
  22     sample = QUIC_PORT_MISMATCH_BASE;
  23   } else {
  24     sample = QUIC_ADDRESS_AND_PORT_MATCH_BASE;
  25   }
  26
  27   // Add an offset to |sample|:
  28   //   V4_V4: add 0
  29   //   V6_V6: add 1
  30   //   V4_V6: add 2
  31   //   V6_V4: add 3
  32   bool first_ipv4 = (first_address.address().size() == kIPv4AddressSize);
  33   bool second_ipv4 = (second_address.address().size() == kIPv4AddressSize);
  34   if (first_ipv4 != second_ipv4) {
  35     CHECK_EQ(sample, QUIC_ADDRESS_MISMATCH_BASE);
  36     sample += 2;
  37   }
  38   if (!first_ipv4) {
  39     sample += 1;
  40   }
  41   return sample;
  42 }
  43
  44 }  // namespace net