nel/src/net/login_cookie.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License, or (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "stdnet.h"
  18
  19 #include "nel/net/login_cookie.h"
  20
  21 using namespace std;
  22 using namespace NLMISC;
  23
  24
  25 namespace NLNET {
  26
  27
  28 /*
  29  * Comparison == operator
  30  */
  31 bool operator== (const CLoginCookie &c1, const CLoginCookie &c2)
  32 {
  33         nlassert (c1._Valid && c2._Valid);
  34
  35         return c1._UserAddr==c2._UserAddr && c1._UserKey==c2._UserKey && c1._UserId==c2._UserId;
  36 }
  37
  38 /*
  39  * Comparison != operator
  40  */
  41 bool operator!= (const CLoginCookie &c1, const CLoginCookie &c2)
  42 {
  43         return !(c1 == c2);
  44 }
  45
  46 CLoginCookie::CLoginCookie (uint32 addr, uint32 id) : _Valid(true), _UserAddr(addr), _UserId(id)
  47 {
  48         // generates the key for this cookie
  49         _UserKey = generateKey();
  50 }
  51
  52 uint32 CLoginCookie::generateKey()
  53 {
  54         uint32 t = (uint32)time (NULL);
  55     srand (t);
  56
  57         uint32 r = rand ();
  58         static uint32 n = 0;
  59         n++;
  60
  61         // 12bits for the time (in second) => loop in 1 hour
  62         //  8bits for random => 256 case
  63         // 12bits for the inc number => can generate 4096 keys per second without any problem (if you generate more than this number, you could have 2 same keys)
  64         return (t&0xFFF)<<20 | (r&0xFF)<<12 | (n&0xFFF);
  65
  66         // 12bits for the time (in second) => loop in 1 hour
  67         // 20bits for the inc number => can generate more than 1 million keys per second without any problem (never exceed on my computer)
  68 //      return (t&0xFFF)<<20 | (n&0xFFFFF);
  69 }
  70
  71
  72 /* test key generation
  73 void main()
  74 {
  75         set<uint32> myset;
  76
  77         // generates the key for this cookie
  78         for(;;)
  79         {
  80                 uint32 val = (t&0xFFF)<<20 | (r&0xFF)<<12 | (n&0xFFF);
  81                 pair<set<uint32>::iterator,bool> p = myset.insert (val);
  82                 if (!p.second) printf("%10u 0x%x already inserted\n", val, val);
  83         }
  84 }
  85 */
  86
  87 } // NL.