src/libs/ec/cpp/ECTag.h

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2004-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 //
   6 // Any parts of this program derived from the xMule, lMule or eMule project,
   7 // or contributed by third-party developers are copyrighted by their
   8 // respective authors.
   9 //
  10 // This program is free software; you can redistribute it and/or modify
  11 // it under the terms of the GNU General Public License as published by
  12 // the Free Software Foundation; either version 2 of the License, or
  13 // (at your option) any later version.
  14 //
  15 // This program is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License
  21 // along with this program; if not, write to the Free Software
  22 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  23 //
  24
  25 #ifndef ECTAG_H
  26 #define ECTAG_H
  27
  28 #include <iostream>
  29 #include <sstream>
  30
  31 // Must be first!
  32 #ifdef USE_WX_EXTENSIONS
  33 #include <wx/string.h> // Do_not_auto_remove
  34 #include <common/StringFunctions.h>
  35
  36 #define EC_ASSERT(x)    wxASSERT(x)
  37 #else
  38 #define EC_ASSERT(x)    assert(x)
  39 #endif
  40
  41 /* aMule/libcommon generic includes */
  42 #include "../../../MD4Hash.h"           // Needed for CMD4Hash
  43
  44 /* EC specific includes */
  45 #include "ECCodes.h"            // Needed for EC types
  46 #include "ECTagTypes.h" // Needed for TagTypes
  47
  48
  49 class CECSocket;
  50 class CValueMap;
  51
  52 /**
  53  * Class to hold IPv4 address.
  54  */
  55 class EC_IPv4_t {
  56         public:
  57                 EC_IPv4_t() { }
  58                 EC_IPv4_t(uint32 ip, uint16 port)
  59                 {
  60                         m_ip[0] = ip & 0xff;
  61                         m_ip[1] = (ip >> 8) & 0xff;
  62                         m_ip[2] = (ip >> 16) & 0xff;
  63                         m_ip[3] = (ip >> 24) & 0xff;
  64                         m_port = port;
  65                 }
  66
  67                 uint32 IP()
  68                 {
  69                         return m_ip[0] | (m_ip[1] << 8) | (m_ip[2] << 16) | (m_ip[3] << 24);
  70                 }
  71
  72                 std::string StringIPSTL(bool brackets = true)
  73                 {
  74                         std::ostringstream string_ip;
  75                         if (brackets) string_ip << "[";
  76                         string_ip << (int)m_ip[0] << "." << (int)m_ip[1] << "." << (int)m_ip[2] << "." << (int)m_ip[3] << ":" << m_port;
  77                         if (brackets) string_ip << "]";
  78                         return string_ip.str();
  79                 }
  80
  81                 #ifdef USE_WX_EXTENSIONS
  82                 wxString StringIP(bool brackets = true) {
  83                         return char2unicode(StringIPSTL(brackets).c_str());
  84                 }
  85                 #endif
  86
  87                 uint8 m_ip[4];
  88                 uint16 m_port;
  89 };
  90
  91
  92 /**
  93  * High level EC packet TAGs handler class
  94  */
  95
  96 class CECTag {
  97         public:
  98                 CECTag(ec_tagname_t name, unsigned int length, const void *data);
  99                 // tag for custom data: just init object, alloc buffer and return pointer
 100                 CECTag(ec_tagname_t name, unsigned int length, void **dataptr);
 101                 // Routines for special data types.
 102                 CECTag(ec_tagname_t name, bool data);
 103                 CECTag(ec_tagname_t name, uint8_t data);
 104                 CECTag(ec_tagname_t name, uint16_t data);
 105                 CECTag(ec_tagname_t name, uint32_t data);
 106                 CECTag(ec_tagname_t name, uint64_t data);
 107                 CECTag(ec_tagname_t name, double data);
 108                 CECTag(ec_tagname_t name, const std::string& data);
 109                 CECTag(ec_tagname_t name, const EC_IPv4_t& data);
 110                 CECTag(ec_tagname_t name, const CMD4Hash& data);
 111                 #ifdef USE_WX_EXTENSIONS
 112                 CECTag(ec_tagname_t name, const wxString& data);
 113                 CECTag(ec_tagname_t name, const wxChar* data);
 114                 #endif
 115                 CECTag(ec_tagname_t name, const char* data) { ConstructStringTag(name, data); }
 116                 CECTag();
 117                 CECTag(const CECTag& tag);
 118                 ~CECTag(void);
 119
 120                 CECTag&         operator=(const CECTag& rhs);
 121                 bool            operator==(const CECTag& tag) const;
 122                 bool            operator!=(const CECTag& tag) const     { return !(*this == tag); }
 123                 bool            AddTag(const CECTag& tag, CValueMap* valuemap = NULL);
 124                 void            AddTag(ec_tagname_t name, uint64_t data, CValueMap* valuemap = NULL);
 125                 void            AddTag(ec_tagname_t name, const CMD4Hash& data, CValueMap* valuemap);
 126                 #ifdef USE_WX_EXTENSIONS
 127                 void            AddTag(ec_tagname_t name, const wxString& data, CValueMap* valuemap = NULL);
 128                 #endif
 129
 130                 const CECTag*   GetFirstTagSafe() const { return m_tagList.empty() ? &s_theNullTag : & *m_tagList.begin(); }
 131
 132                 const CECTag*   GetTagByName(ec_tagname_t name) const;
 133                 CECTag*                 GetTagByName(ec_tagname_t name);
 134                 const CECTag*   GetTagByNameSafe(ec_tagname_t name) const;
 135
 136                 size_t                  GetTagCount() const { return m_tagList.size(); }
 137                 bool                    HasChildTags() const { return !m_tagList.empty(); }
 138                 const void *    GetTagData() const {
 139                         EC_ASSERT(m_dataType == EC_TAGTYPE_CUSTOM);
 140                         return m_tagData;
 141                 }
 142                 uint16_t                GetTagDataLen() const { return m_dataLen; }
 143                 uint32_t                GetTagLen() const;
 144                 ec_tagname_t            GetTagName() const { return m_tagName; }
 145
 146                 // Retrieving special data types
 147                 uint64_t                GetInt() const;
 148                 bool                    IsInt() const { return m_dataType >= EC_TAGTYPE_UINT8 && m_dataType <= EC_TAGTYPE_UINT64; }
 149                 double                  GetDoubleData() const;
 150                 std::string             GetStringDataSTL() const;
 151                 bool                    IsString() const { return m_dataType == EC_TAGTYPE_STRING; }
 152
 153                 #ifdef USE_WX_EXTENSIONS
 154                 wxString GetStringData() const;
 155                 void SetStringData(const wxString& s);
 156                 #endif
 157
 158                 EC_IPv4_t       GetIPv4Data() const;
 159                 CMD4Hash        GetMD4Data() const;
 160
 161                 void            DebugPrint(int level, bool print_empty) const;
 162                 void            swap(CECTag & t);
 163
 164                 // If tag exists, return its value and store it in target (if target != NULL)
 165                 // Else return safe value and don't touch target
 166                 // Allows for one function for old and new style.
 167                 bool            AssignIfExist(ec_tagname_t tagname, bool *target) const;
 168                 uint8_t         AssignIfExist(ec_tagname_t tagname, uint8_t *target) const;
 169                 uint16_t        AssignIfExist(ec_tagname_t tagname, uint16_t *target) const;
 170                 uint32_t        AssignIfExist(ec_tagname_t tagname, uint32_t *target) const;
 171                 uint64_t        AssignIfExist(ec_tagname_t tagname, uint64_t *target) const;
 172                 time_t          AssignIfExist(ec_tagname_t tagname, time_t *target) const;
 173                 double          AssignIfExist(ec_tagname_t tagname, double *target) const;
 174                 float           AssignIfExist(ec_tagname_t tagname, float *target) const;
 175                 CMD4Hash        AssignIfExist(ec_tagname_t tagname, CMD4Hash *target) const;
 176                 std::string     AssignIfExist(ec_tagname_t tagname, std::string *target) const;
 177                 #ifdef USE_WX_EXTENSIONS
 178                 wxString        AssignIfExist(ec_tagname_t tagname, wxString *target) const;
 179                 #endif
 180
 181                 // If tag exists, return true and store it in target
 182                 // Else return false and don't touch target
 183                 bool            AssignIfExist(ec_tagname_t tagname, bool &target) const;
 184                 bool            AssignIfExist(ec_tagname_t tagname, uint8_t &target) const;
 185                 bool            AssignIfExist(ec_tagname_t tagname, uint16_t &target) const;
 186                 bool            AssignIfExist(ec_tagname_t tagname, uint32_t &target) const;
 187                 bool            AssignIfExist(ec_tagname_t tagname, uint64_t &target) const;
 188                 bool            AssignIfExist(ec_tagname_t tagname, time_t &target) const;
 189                 bool            AssignIfExist(ec_tagname_t tagname, double &target) const;
 190                 bool            AssignIfExist(ec_tagname_t tagname, float &target) const;
 191                 bool            AssignIfExist(ec_tagname_t tagname, CMD4Hash &target) const;
 192                 bool            AssignIfExist(ec_tagname_t tagname, std::string &target) const;
 193                 #ifdef USE_WX_EXTENSIONS
 194                 bool            AssignIfExist(ec_tagname_t tagname, wxString &target) const;
 195                 #endif
 196
 197         protected:
 198
 199                 uint8_t GetType() const { return m_dataType; }
 200
 201                 bool            ReadFromSocket(CECSocket& socket);
 202                 bool            WriteTag(CECSocket& socket) const;
 203                 bool            ReadChildren(CECSocket& socket);
 204                 bool            WriteChildren(CECSocket& socket) const;
 205
 206         private:
 207                 // To init. the automatic int data
 208                 void InitInt(uint64_t data);
 209
 210                 ec_tagname_t    m_tagName;
 211                 ec_tagtype_t    m_dataType;
 212                 ec_taglen_t             m_dataLen;
 213                 char *                  m_tagData;
 214                 void NewData()  { m_tagData = new char[m_dataLen]; }
 215
 216                 typedef std::list<CECTag> TagList;
 217                 TagList m_tagList;
 218
 219                 static const CECTag s_theNullTag;
 220
 221                 // To be used by the string constructors.
 222                 void ConstructStringTag(ec_tagname_t name, const std::string& data);
 223
 224         public:
 225                 // Iteration through child tags
 226                 typedef TagList::const_iterator const_iterator;
 227                 const_iterator begin()  const { return m_tagList.begin(); }
 228                 const_iterator end()    const { return m_tagList.end(); }
 229 };
 230
 231
 232 /**
 233  * An empty TAG
 234  *
 235  * Note, that an "empty" tag is empty because it contains no data, but it still
 236  * may contain children.
 237  */
 238 class CECEmptyTag : public CECTag {
 239         public:
 240                 CECEmptyTag(ec_tagname_t name = 0) : CECTag(name, 0, (const void *) NULL) {}
 241 };
 242
 243 /**
 244  * An integer TAG
 245  *
 246  * This is just to easily overcome ctor ambiguity. It's prettier to write
 247  *              CECIntTag(name, some_value)
 248  * instead of
 249  *              CECTag(name, (uint64)value)
 250  */
 251 class CECIntTag : public CECTag {
 252         public:
 253                 CECIntTag(ec_tagname_t name, uint64 data) : CECTag(name, data) {}
 254 };
 255
 256 #endif /* ECTAG_H */
 257 // File_checked_for_headers