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_config.h"
  15 #include "configreader.h"
  16 #include "users.h"
  17 #include "channels.h"
  18 #include "modules.h"
  19 #include "hashcomp.h"
  20 #include "inspircd.h"
  21
  22 /* $ModDesc: Provides XMLSocket support for clients */
  23
  24 class ModuleXMLSocket : public Module
  25 {
  26         ConfigReader* Conf;
  27         std::vector<int> listenports;
  28
  29  public:
  30
  31         ModuleXMLSocket(InspIRCd* Me)
  32                 : Module::Module(Me)
  33         {
  34                 OnRehash(NULL,"");
  35         }
  36
  37         virtual void OnRehash(userrec* user, const std::string &param)
  38         {
  39
  40                 Conf = new ConfigReader(ServerInstance);
  41
  42                 for (unsigned int i = 0; i < listenports.size(); i++)
  43                 {
  44                         ServerInstance->Config->DelIOHook(listenports[i]);
  45                 }
  46
  47                 listenports.clear();
  48
  49                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
  50                 {
  51                         // For each <bind> tag
  52                         if (((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadFlag("bind", "xmlsocket", i)))
  53                         {
  54                                 // Get the port we're meant to be listening on with SSL
  55                                 std::string port = Conf->ReadValue("bind", "port", i);
  56                                 irc::portparser portrange(port, false);
  57                                 long portno = -1;
  58                                 while ((portno = portrange.GetToken()))
  59                                 {
  60                                         try
  61                                         {
  62                                                 if (ServerInstance->Config->AddIOHook(portno, this))
  63                                                 {
  64                                                         listenports.push_back(portno);
  65                                                                 for (unsigned int i = 0; i < ServerInstance->stats->BoundPortCount; i++)
  66                                                                 if (ServerInstance->Config->ports[i] == portno)
  67                                                                         ServerInstance->Config->openSockfd[i]->SetDescription("xml");
  68                                                 }
  69                                                 else
  70                                                 {
  71                                                         ServerInstance->Log(DEFAULT, "m_xmlsocket.so: FAILED to enable XMLSocket on port %d, maybe you have another similar module loaded?", portno);
  72                                                 }
  73                                         }
  74                                         catch (ModuleException &e)
  75                                         {
  76                                                 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());
  77                                         }
  78                                 }
  79                         }
  80                 }
  81
  82                 DELETE(Conf);
  83         }
  84
  85         virtual ~ModuleXMLSocket()
  86         {
  87         }
  88
  89         virtual void OnUnloadModule(Module* mod, const std::string &name)
  90         {
  91                 if (mod == this)
  92                 {
  93                         for(unsigned int i = 0; i < listenports.size(); i++)
  94                         {
  95                                 ServerInstance->Config->DelIOHook(listenports[i]);
  96                                 for (unsigned int j = 0; j < ServerInstance->stats->BoundPortCount; j++)
  97                                         if (ServerInstance->Config->ports[j] == listenports[i])
  98                                                 if (ServerInstance->Config->openSockfd[j])
  99                                                         ServerInstance->Config->openSockfd[j]->SetDescription("plaintext");
 100                         }
 101                 }
 102         }
 103
 104         virtual Version GetVersion()
 105         {
 106                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 107         }
 108
 109         void Implements(char* List)
 110         {
 111                 List[I_OnUnloadModule] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnRehash] = 1;
 112         }
 113
 114         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 115         {
 116                 userrec* user = dynamic_cast<userrec*>(ServerInstance->FindDescriptor(fd));
 117
 118                 if (user == NULL)
 119                         return -1;
 120
 121                 int result = user->ReadData(buffer, count);
 122
 123                 if ((result == -1) && (errno == EAGAIN))
 124                         return -1;
 125                 else if (result < 1)
 126                         return 0;
 127
 128                 /* XXX: The core is more than happy to split lines purely on an \n
 129                  * rather than a \r\n. This is good for us as it means that the size
 130                  * of data we are receiving is exactly the same as the size of data
 131                  * we asked for, and we dont need to re-implement our own socket
 132                  * buffering (See below)
 133                  */
 134                 for (int n = 0; n < result; n++)
 135                         if (buffer[n] == 0)
 136                                 buffer[n] = '\n';
 137
 138                 readresult = result;
 139                 return result;
 140         }
 141
 142         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 143         {
 144                 userrec* user = dynamic_cast<userrec*>(ServerInstance->FindDescriptor(fd));
 145
 146                 if (user == NULL)
 147                         return -1;
 148
 149                 /* We want to alter the buffer, so we have to make a copy */
 150                 char tmpbuffer[count+1];
 151                 memcpy(tmpbuffer, buffer, count);
 152
 153                 /* XXX: This will actually generate lines "looking\0\0like\0\0this"
 154                  * rather than lines "looking\0like\0this". This shouldnt be a problem
 155                  * to the client, but it saves us a TON of processing and the need
 156                  * to re-implement socket buffering, as the data we are sending is
 157                  * exactly the same length as the data we are receiving.
 158                  */
 159                 for (int n = 0; n < count; n++)
 160                         if ((tmpbuffer[n] == '\r') || (tmpbuffer[n] == '\n'))
 161                                 tmpbuffer[n] = 0;
 162
 163                 user->AddWriteBuf(std::string(tmpbuffer,count));
 164
 165                 return 1;
 166         }
 167
 168 };
 169
 170 class ModuleXMLSocketFactory : public ModuleFactory
 171 {
 172  public:
 173         ModuleXMLSocketFactory()
 174         {
 175         }
 176
 177         ~ModuleXMLSocketFactory()
 178         {
 179         }
 180
 181         virtual Module * CreateModule(InspIRCd* Me)
 182         {
 183                 return new ModuleXMLSocket(Me);
 184         }
 185 };
 186
 187
 188 extern "C" void * init_module( void )
 189 {
 190         return new ModuleXMLSocketFactory;
 191 }