| // 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_ |
| |