Vidalia 0.2.10
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00001 /* 00002 ** This file is part of Vidalia, and is subject to the license terms in the 00003 ** LICENSE file, found in the top level directory of this distribution. If you 00004 ** did not receive the LICENSE file with this file, you may obtain it from the 00005 ** Vidalia source package distributed by the Vidalia Project at 00006 ** http://www.vidalia-project.net/. No part of Vidalia, including this file, 00007 ** may be copied, modified, propagated, or distributed except according to the 00008 ** terms described in the LICENSE file. 00009 */ 00010 00011 /* 00012 ** \file AddressMap.cpp 00013 ** \version $Id: bandwidthevent.h 1563 2006-12-26 06:06:04Z edmanm $ 00014 ** \brief Stores a list of address mappings and their expiration times 00015 */ 00016 00017 #include "tcglobal.h" 00018 #include "AddressMap.h" 00019 00020 #include <QStringList> 00021 00022 00023 /** Format of expiry times in address map events. */ 00024 #define DATE_FMT "\"yyyy-MM-dd HH:mm:ss\"" 00025 00026 00027 /** Adds a new address mapping from the address <b>from</b> to the address 00028 * <b>to</b>, that expires at <b>expires</b>. */ 00029 void 00030 AddressMap::add(const QString &from, const QString &to, 00031 const QDateTime &expires) 00032 { 00033 tc::debug("New address mapping: %1 -> %2 (expires %3)").arg(from) 00034 .arg(to) 00035 .arg(expires.isValid() ? expires.toString(DATE_FMT) 00036 : "never"); 00037 insert(from, AddressMapEntry(to, expires)); 00038 } 00039 00040 /** Adds a new address mapping by parsing the fields in <b>mapping</b>, which 00041 * should be formatted as follows: 00042 * 00043 * Address SP Address SP Expiry 00044 * Expiry = DQUOTE ISOTime DQUOTE / "NEVER" 00045 */ 00046 void 00047 AddressMap::add(const QString &mapping) 00048 { 00049 QStringList parts = mapping.split(" "); 00050 if (parts.size() >= 2) { 00051 QDateTime expires; 00052 if (parts.size() >= 4 && parts.at(2) != "NEVER") { 00053 expires = QDateTime::fromString(parts.at(2) + " " + parts.at(3), 00054 DATE_FMT); 00055 00056 /* Tor gives us the expiry time in UTC, but we will do subsequent 00057 * comparisons based on local time. So do the proper conversion now. */ 00058 expires.setTimeSpec(Qt::UTC); 00059 expires = expires.toLocalTime(); 00060 } 00061 add(parts.at(0), parts.at(1), expires); 00062 } 00063 } 00064 00065 /** Returns true if <b>entry</b> is expired; false otherwise. */ 00066 bool 00067 AddressMap::isExpired(const AddressMapEntry &entry) const 00068 { 00069 if (entry.second.isValid()) 00070 return (entry.second < QDateTime::currentDateTime()); 00071 return false; /* No expiry time == valid forever */ 00072 } 00073 00074 /** Returns true if there exists a mapping for <b>addr</b> and that mapping is 00075 * not expired. */ 00076 bool 00077 AddressMap::isMapped(const QString &addr) const 00078 { 00079 return (contains(addr) && !isExpired(value(addr))); 00080 } 00081 00082 /** Returns the address to which <b>addr</b> is currently mapped. If there is 00083 * no mapping for <b>addr</b> (or the mapping is expired), then an empty 00084 * string is returned. */ 00085 QString 00086 AddressMap::mappedTo(const QString &addr) const 00087 { 00088 AddressMapEntry entry = value(addr); 00089 return (isExpired(entry) ? QString() : entry.first); 00090 } 00091 00092 /** Returns the reverse of this address map by swapping each address in the 00093 * address map with its mapped address. The expiration times are unaltered. */ 00094 AddressMap 00095 AddressMap::reverse() const 00096 { 00097 AddressMap reverseMap; 00098 foreach (QString from, keys()) { 00099 /* Flip the "from" and the "to" addresses and retain the expiry time. */ 00100 AddressMapEntry entry = value(from); 00101 reverseMap.add(entry.first, from, entry.second); 00102 } 00103 return reverseMap; 00104 } 00105