1 /* <!-- copyright */ 2 /* 3 * aria2 - The high speed download utility 4 * 5 * Copyright (C) 2006 Tatsuhiro Tsujikawa 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 * 21 * In addition, as a special exception, the copyright holders give 22 * permission to link the code of portions of this program with the 23 * OpenSSL library under certain conditions as described in each 24 * individual source file, and distribute linked combinations 25 * including the two. 26 * You must obey the GNU General Public License in all respects 27 * for all of the code used other than OpenSSL. If you modify 28 * file(s) with this exception, you may extend this exception to your 29 * version of the file(s), but you are not obligated to do so. If you 30 * do not wish to do so, delete this exception statement from your 31 * version. If you delete this exception statement from all source 32 * files in the program, then also delete it here. 33 */ 34 /* copyright --> */ 35 #ifndef D_ASYNC_NAME_RESOLVER_H 36 #define D_ASYNC_NAME_RESOLVER_H 37 38 #include "common.h" 39 40 #include <string> 41 #include <vector> 42 43 #include <ares.h> 44 45 #include "a2netcompat.h" 46 47 namespace aria2 { 48 49 class AsyncNameResolver { 50 friend void callback(void* arg, int status, int timeouts, 51 struct hostent* host); 52 53 public: 54 enum STATUS { 55 STATUS_READY, 56 STATUS_QUERYING, 57 STATUS_SUCCESS, 58 STATUS_ERROR, 59 }; 60 61 private: 62 STATUS status_; 63 int family_; 64 ares_channel channel_; 65 66 std::vector<std::string> resolvedAddresses_; 67 std::string error_; 68 std::string hostname_; 69 70 public: 71 AsyncNameResolver(int family 72 #ifdef HAVE_ARES_ADDR_NODE 73 , 74 ares_addr_node* servers 75 #endif // HAVE_ARES_ADDR_NODE 76 ); 77 78 ~AsyncNameResolver(); 79 80 void resolve(const std::string& name); 81 getResolvedAddresses()82 const std::vector<std::string>& getResolvedAddresses() const 83 { 84 return resolvedAddresses_; 85 } 86 getError()87 const std::string& getError() const { return error_; } 88 getStatus()89 STATUS getStatus() const { return status_; } 90 91 int getFds(fd_set* rfdsPtr, fd_set* wfdsPtr) const; 92 93 void process(fd_set* rfdsPtr, fd_set* wfdsPtr); 94 getFamily()95 int getFamily() const { return family_; } 96 #ifdef HAVE_LIBCARES 97 98 int getsock(sock_t* sockets) const; 99 100 void process(ares_socket_t readfd, ares_socket_t writefd); 101 102 #endif // HAVE_LIBCARES 103 104 bool operator==(const AsyncNameResolver& resolver) const; 105 106 void setAddr(const std::string& addrString); 107 108 void reset(); 109 getHostname()110 const std::string& getHostname() const { return hostname_; } 111 }; 112 113 #ifdef HAVE_ARES_ADDR_NODE 114 115 ares_addr_node* parseAsyncDNSServers(const std::string& serversOpt); 116 117 #endif // HAVE_ARES_ADDR_NODE 118 119 } // namespace aria2 120 121 #endif // D_ASYNC_NAME_RESOLVER_H 122