Add autodetection of "intranet" redirection, for ISPs etc. that send typos an...

net/base/host_resolver_proc.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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_BASE_HOST_RESOLVER_PROC_H_
 #define NET_BASE_HOST_RESOLVER_PROC_H_
 
 #include <string>
 
 #include "base/ref_counted.h"
 #include "net/base/address_family.h"
@@ skipping 28 matching lines @@
   // Asks the fallback procedure (if set) to do the resolve.
   int ResolveUsingPrevious(const std::string& host,
                            AddressFamily address_family,
                            AddressList* addrlist);
 
  private:
   friend class HostResolverImpl;
   friend class MockHostResolverBase;
   friend class ScopedDefaultHostResolverProc;
 
-  // Sets the previous procedure in the chain.
-  void set_previous_proc(HostResolverProc* proc) {
-    previous_proc_ = proc;
-  }
+  // Sets the previous procedure in the chain.  Aborts if this would result in a
+  // cycle.
+  void SetPreviousProc(HostResolverProc* proc);
+
+  // Sets the last procedure in the chain, i.e. appends |proc| to the end of the
+  // current chain.  Aborts if this would result in a cycle.
+  void SetLastProc(HostResolverProc* proc);
+
+  // Returns the last procedure in the chain starting at |proc|.  Will return
+  // NULL iff |proc| is NULL.
+  static HostResolverProc* GetLastProc(HostResolverProc* proc);
 
   // Sets the default host resolver procedure that is used by HostResolverImpl.
   // This can be used through ScopedDefaultHostResolverProc to set a catch-all
   // DNS block in unit-tests (individual tests should use MockHostResolver to
   // prevent hitting the network).
   static HostResolverProc* SetDefault(HostResolverProc* proc);
   static HostResolverProc* GetDefault();
 
- private:
   scoped_refptr<HostResolverProc> previous_proc_;
   static HostResolverProc* default_proc_;
 
   DISALLOW_COPY_AND_ASSIGN(HostResolverProc);
 };
 
 // Resolves |host| to an address list, using the system's default host resolver.
 // (i.e. this calls out to getaddrinfo()). If successful returns OK and fills
 // |addrlist| with a list of socket addresses. Otherwise returns a
 // network error code.
 int SystemHostResolverProc(const std::string& host,
                            AddressFamily address_family,
                            AddressList* addrlist);
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_RESOLVER_PROC_H_