1 files changed, 79 insertions, 0 deletions
diff --git a/chromium/net/dns/dns_hosts.h b/chromium/net/dns/dns_hosts.h
new file mode 100644
index 00000000000..c2b290907ad
--- /dev/null
+++ b/chromium/net/dns/dns_hosts.h
@@ -0,0 +1,79 @@
+// 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_DNS_DNS_HOSTS_H_
+#define NET_DNS_DNS_HOSTS_H_
+
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/containers/hash_tables.h"
+#include "base/files/file_path.h"
+#include "net/base/address_family.h"
+#include "net/base/net_export.h"
+#include "net/base/net_util.h"  // can't forward-declare IPAddressNumber
+
+namespace net {
+  typedef std::pair<std::string, AddressFamily> DnsHostsKey;
+};
+
+namespace BASE_HASH_NAMESPACE {
+#if defined(COMPILER_GCC)
+
+template<>
+struct hash<net::DnsHostsKey> {
+  std::size_t operator()(const net::DnsHostsKey& key) const {
+    hash<base::StringPiece> string_piece_hash;
+    return string_piece_hash(key.first) + key.second;
+  }
+};
+
+#elif defined(COMPILER_MSVC)
+
+inline size_t hash_value(const net::DnsHostsKey& key) {
+  return hash_value(key.first) + key.second;
+}
+
+#endif  // COMPILER
+
+}  // namespace BASE_HASH_NAMESPACE
+
+namespace net {
+
+// Parsed results of a Hosts file.
+//
+// Although Hosts files map IP address to a list of domain names, for name
+// resolution the desired mapping direction is: domain name to IP address.
+// When parsing Hosts, we apply the "first hit" rule as Windows and glibc do.
+// With a Hosts file of:
+// 300.300.300.300 localhost # bad ip
+// 127.0.0.1 localhost
+// 10.0.0.1 localhost
+// The expected resolution of localhost is 127.0.0.1.
+#if !defined(OS_ANDROID)
+typedef base::hash_map<DnsHostsKey, IPAddressNumber> DnsHosts;
+#else
+// Android's hash_map doesn't support ==, so fall back to map.  (Chromium on
+// Android doesn't use the built-in DNS resolver anyway, so it's irrelevant.)
+typedef std::map<DnsHostsKey, IPAddressNumber> DnsHosts;
+#endif
+
+// Parses |contents| (as read from /etc/hosts or equivalent) and stores results
+// in |dns_hosts|. Invalid lines are ignored (as in most implementations).
+void NET_EXPORT_PRIVATE ParseHosts(const std::string& contents,
+                                   DnsHosts* dns_hosts);
+
+// As above but reads the file pointed to by |path|.
+bool NET_EXPORT_PRIVATE ParseHostsFile(const base::FilePath& path,
+                                       DnsHosts* dns_hosts);
+
+
+
+}  // namespace net
+
+#endif  // NET_DNS_DNS_HOSTS_H_
+