Allow IP migration.

net/quic/core/quic_protocol.h

 // 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_QUIC_QUIC_PROTOCOL_H_
 #define NET_QUIC_QUIC_PROTOCOL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1163 matching lines @@
   NUM_ENCRYPTION_LEVELS,
 };
 
 enum PeerAddressChangeType {
   // IP address and port remain unchanged.
   NO_CHANGE,
   // Port changed, but IP address remains unchanged.
   PORT_CHANGE,
   // IPv4 address changed, but within the /24 subnet (port may have changed.)
   IPV4_SUBNET_CHANGE,
+  // IPv4 address changed, excluding /24 subnet change (port may have changed.)
+  IPV4_TO_IPV4_CHANGE,
   // IP address change from an IPv4 to an IPv6 address (port may have changed.)
   IPV4_TO_IPV6_CHANGE,
   // IP address change from an IPv6 to an IPv4 address (port may have changed.)
   IPV6_TO_IPV4_CHANGE,
   // IP address change from an IPv6 to an IPv6 address (port may have changed.)
   IPV6_TO_IPV6_CHANGE,
-  // All other peer address changes.
-  UNSPECIFIED_CHANGE,
 };
 
 struct NET_EXPORT_PRIVATE QuicFrame {
   QuicFrame();
   explicit QuicFrame(QuicPaddingFrame padding_frame);
   explicit QuicFrame(QuicMtuDiscoveryFrame frame);
   explicit QuicFrame(QuicPingFrame frame);
 
   explicit QuicFrame(QuicStreamFrame* stream_frame);
   explicit QuicFrame(QuicAckFrame* frame);
@@ skipping 328 matching lines @@
       : iov(iov), iov_count(iov_count), total_length(total_length) {}
 
   const struct iovec* iov;
   const int iov_count;
   const size_t total_length;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PROTOCOL_H_