00001 /**************************************************************** 00002 * Vidalia is distributed under the following license: 00003 * 00004 * Copyright (C) 2007, Matt Edman, Justin Hipple 00005 * 00006 * This program is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU General Public License 00008 * as published by the Free Software Foundation; either version 2 00009 * of the License, or (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 00019 * Boston, MA 02110-1301, USA. 00020 ****************************************************************/ 00021 00022 /** 00023 * \file addressmap.cpp 00024 * \version $Id: bandwidthevent.h 1563 2006-12-26 06:06:04Z edmanm $ 00025 * \brief Stores a list of address mappings and their expiration times 00026 */ 00027 00028 #include <QStringList> 00029 #include <vidalia.h> 00030 00031 #include "addressmap.h" 00032 00033 /** Format of expiry times in address map events. */ 00034 #define DATE_FMT "\"yyyy-MM-dd HH:mm:ss\"" 00035 00036 00037 /** Adds a new address mapping from the address <b>from</b> to the address 00038 * <b>to</b>, that expires at <b>expires</b>. */ 00039 void 00040 AddressMap::add(QString from, QString to, QDateTime expires) 00041 { 00042 vInfo("New address mapping: %1 -> %2 (expires %3)") 00043 .arg(from).arg(to) 00044 .arg(expires.isValid() ? expires.toString(DATE_FMT) : "never"); 00045 insert(from, addr_map_entry_t(to, expires)); 00046 } 00047 00048 /** Adds a new address mapping by parsing the fields in <b>mapping</b>, which 00049 * should be formatted as follows: 00050 * 00051 * Address SP Address SP Expiry 00052 * Expiry = DQUOTE ISOTime DQUOTE / "NEVER" 00053 */ 00054 void 00055 AddressMap::add(QString mapping) 00056 { 00057 QStringList parts = mapping.split(" "); 00058 if (parts.size() >= 2) { 00059 QDateTime expires; 00060 if (parts.size() >= 4 && parts.at(2) != "NEVER") 00061 expires = QDateTime::fromString(parts.at(2) + " " + parts.at(3), 00062 DATE_FMT); 00063 add(parts.at(0), parts.at(1), expires); 00064 } 00065 } 00066 00067 /** Returns true if <b>entry</b> is expired; false otherwise. */ 00068 bool 00069 AddressMap::isExpired(addr_map_entry_t entry) const 00070 { 00071 if (entry.second.isValid()) 00072 return (entry.second < QDateTime::currentDateTime()); 00073 return false; /* No expiry time == valid forever */ 00074 } 00075 00076 /** Returns true if there exists a mapping for <b>addr</b> and that mapping is 00077 * not expired. */ 00078 bool 00079 AddressMap::isMapped(QString addr) const 00080 { 00081 return (contains(addr) && !isExpired(value(addr))); 00082 } 00083 00084 /** Returns the address to which <b>addr</b> is currently mapped. If there is 00085 * no mapping for <b>addr</b> (or the mapping is expired), then an empty 00086 * string is returned. */ 00087 QString 00088 AddressMap::mappedTo(QString addr) const 00089 { 00090 addr_map_entry_t entry = value(addr); 00091 return (isExpired(entry) ? QString() : entry.first); 00092 } 00093 00094 /** Returns the reverse of this address map by swapping each address in the 00095 * address map with its mapped address. The expiration times are unaltered. */ 00096 AddressMap 00097 AddressMap::reverse() const 00098 { 00099 AddressMap reverseMap; 00100 foreach (QString from, keys()) { 00101 /* Flip the "from" and the "to" addresses and retain the expiry time. */ 00102 addr_map_entry_t entry = value(from); 00103 reverseMap.add(entry.first, from, entry.second); 00104 } 00105 return reverseMap; 00106 } 00107