src/modules/m_xmlsocket.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "hashcomp.h"
  19
  20 /* $ModDesc: Provides XMLSocket support for clients */
  21
  22 class ModuleXMLSocket : public Module
  23 {
  24         ConfigReader* Conf;
  25         std::vector<int> listenports;
  26
  27  public:
  28
  29         ModuleXMLSocket(InspIRCd* Me)
  30                 : Module(Me)
  31         {
  32                 OnRehash(NULL,"");
  33         }
  34
  35         virtual void OnRehash(userrec* user, const std::string &param)
  36         {
  37
  38                 Conf = new ConfigReader(ServerInstance);
  39
  40                 for (unsigned int i = 0; i < listenports.size(); i++)
  41                 {
  42                         ServerInstance->Config->DelIOHook(listenports[i]);
  43                 }
  44
  45                 listenports.clear();
  46
  47                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
  48                 {
  49                         // For each <bind> tag
  50                         std::string x = Conf->ReadValue("bind", "type", i);
  51                         if (((x.empty()) || (x == "clients")) && (Conf->ReadFlag("bind", "xmlsocket", i)))
  52                         {
  53                                 // Get the port we're meant to be listening on with SSL
  54                                 std::string port = Conf->ReadValue("bind", "port", i);
  55                                 irc::portparser portrange(port, false);
  56                                 long portno = -1;
  57                                 while ((portno = portrange.GetToken()))
  58                                 {
  59                                         try
  60                                         {
  61                                                 if (ServerInstance->Config->AddIOHook(portno, this))
  62                                                 {
  63                                                         listenports.push_back(portno);
  64                                                                 for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++)
  65                                                                 if (ServerInstance->Config->ports[i]->GetPort() == portno)
  66                                                                         ServerInstance->Config->ports[i]->SetDescription("xml");
  67                                                 }
  68                                                 else
  69                                                 {
  70                                                         ServerInstance->Log(DEFAULT, "m_xmlsocket.so: FAILED to enable XMLSocket on port %d, maybe you have another similar module loaded?", portno);
  71                                                 }
  72                                         }
  73                                         catch (ModuleException &e)
  74                                         {
  75                                                 ServerInstance->Log(DEFAULT, "m_xmlsocket.so: FAILED to enable XMLSocket on port %d: %s. Maybe it's already hooked by the same port on a different IP, or you have another similar module loaded?", portno, e.GetReason());
  76                                         }
  77                                 }
  78                         }
  79                 }
  80
  81                 DELETE(Conf);
  82         }
  83
  84         virtual ~ModuleXMLSocket()
  85         {
  86         }
  87
  88         virtual void OnUnloadModule(Module* mod, const std::string &name)
  89         {
  90                 if (mod == this)
  91                 {
  92                         for(unsigned int i = 0; i < listenports.size(); i++)
  93                         {
  94                                 ServerInstance->Config->DelIOHook(listenports[i]);
  95                                 for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)
  96                                         if (ServerInstance->Config->ports[j]->GetPort() == listenports[i])
  97                                                 ServerInstance->Config->ports[j]->SetDescription("plaintext");
  98                         }
  99                 }
 100         }
 101
 102         virtual Version GetVersion()
 103         {
 104                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 105         }
 106
 107         void Implements(char* List)
 108         {
 109                 List[I_OnUnloadModule] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnRehash] = 1;
 110         }
 111
 112         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 113         {
 114                 userrec* user = dynamic_cast<userrec*>(ServerInstance->FindDescriptor(fd));
 115
 116                 if (user == NULL)
 117                         return -1;
 118
 119                 int result = user->ReadData(buffer, count);
 120
 121                 if ((result == -1) && (errno == EAGAIN))
 122                         return -1;
 123                 else if (result < 1)
 124                         return 0;
 125
 126                 /* XXX: The core is more than happy to split lines purely on an \n
 127                  * rather than a \r\n. This is good for us as it means that the size
 128                  * of data we are receiving is exactly the same as the size of data
 129                  * we asked for, and we dont need to re-implement our own socket
 130                  * buffering (See below)
 131                  */
 132                 for (int n = 0; n < result; n++)
 133                         if (buffer[n] == 0)
 134                                 buffer[n] = '\n';
 135
 136                 readresult = result;
 137                 return result;
 138         }
 139
 140         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 141         {
 142                 userrec* user = dynamic_cast<userrec*>(ServerInstance->FindDescriptor(fd));
 143
 144                 if (user == NULL)
 145                         return -1;
 146
 147                 /* We want to alter the buffer, so we have to make a copy */
 148                 char * tmpbuffer = new char[count + 1];
 149                 memcpy(tmpbuffer, buffer, count);
 150
 151                 /* XXX: This will actually generate lines "looking\0\0like\0\0this"
 152                  * rather than lines "looking\0like\0this". This shouldnt be a problem
 153                  * to the client, but it saves us a TON of processing and the need
 154                  * to re-implement socket buffering, as the data we are sending is
 155                  * exactly the same length as the data we are receiving.
 156                  */
 157                 for (int n = 0; n < count; n++)
 158                         if ((tmpbuffer[n] == '\r') || (tmpbuffer[n] == '\n'))
 159                                 tmpbuffer[n] = 0;
 160
 161                 user->AddWriteBuf(std::string(tmpbuffer,count));
 162                 delete [] tmpbuffer;
 163
 164                 return 1;
 165         }
 166
 167 };
 168
 169 MODULE_INIT(ModuleXMLSocket);
 170