src/modules/m_xmlsocket.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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
  16 /* $ModDesc: Provides XMLSocket support for clients */
  17
  18 class ModuleXMLSocket : public Module
  19 {
  20         ConfigReader* Conf;
  21         std::vector<int> listenports;
  22
  23  public:
  24
  25         ModuleXMLSocket(InspIRCd* Me)
  26                 : Module(Me)
  27         {
  28                 OnRehash(NULL,"");
  29                 Implementation eventlist[] = { I_OnUnloadModule, I_OnRawSocketRead, I_OnRawSocketWrite, I_OnRehash };
  30                 ServerInstance->Modules->Attach(eventlist, this, 4);
  31         }
  32
  33         virtual void OnRehash(User* user, const std::string &param)
  34         {
  35
  36                 Conf = new ConfigReader(ServerInstance);
  37
  38                 for (unsigned int i = 0; i < listenports.size(); i++)
  39                 {
  40                         ServerInstance->Config->DelIOHook(listenports[i]);
  41                 }
  42
  43                 listenports.clear();
  44
  45                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
  46                 {
  47                         // For each <bind> tag
  48                         std::string x = Conf->ReadValue("bind", "type", i);
  49                         if (((x.empty()) || (x == "clients")) && (Conf->ReadFlag("bind", "xmlsocket", i)))
  50                         {
  51                                 // Get the port we're meant to be listening on with SSL
  52                                 std::string port = Conf->ReadValue("bind", "port", i);
  53                                 irc::portparser portrange(port, false);
  54                                 long portno = -1;
  55                                 while ((portno = portrange.GetToken()))
  56                                 {
  57                                         try
  58                                         {
  59                                                 if (ServerInstance->Config->AddIOHook(portno, this))
  60                                                 {
  61                                                         listenports.push_back(portno);
  62                                                                 for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)
  63                                                                 if (ServerInstance->Config->ports[j]->GetPort() == portno)
  64                                                                         ServerInstance->Config->ports[j]->SetDescription("xml");
  65                                                 }
  66                                                 else
  67                                                 {
  68                                                         ServerInstance->Logs->Log("m_xmlsocket",DEFAULT, "m_xmlsocket.so: FAILED to enable XMLSocket on port %d, maybe you have another similar module loaded?", portno);
  69                                                 }
  70                                         }
  71                                         catch (ModuleException &e)
  72                                         {
  73                                                 ServerInstance->Logs->Log("m_xmlsocket",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());
  74                                         }
  75                                 }
  76                         }
  77                 }
  78
  79                 delete Conf;
  80         }
  81
  82         virtual ~ModuleXMLSocket()
  83         {
  84         }
  85
  86         virtual void OnUnloadModule(Module* mod, const std::string &name)
  87         {
  88                 if (mod == this)
  89                 {
  90                         for(unsigned int i = 0; i < listenports.size(); i++)
  91                         {
  92                                 ServerInstance->Config->DelIOHook(listenports[i]);
  93                                 for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)
  94                                         if (ServerInstance->Config->ports[j]->GetPort() == listenports[i])
  95                                                 ServerInstance->Config->ports[j]->SetDescription("plaintext");
  96                         }
  97                 }
  98         }
  99
 100         virtual Version GetVersion()
 101         {
 102                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 103         }
 104
 105
 106         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 107         {
 108                 User* user = dynamic_cast<User*>(ServerInstance->FindDescriptor(fd));
 109
 110                 if (user == NULL)
 111                         return -1;
 112
 113                 int result = user->ReadData(buffer, count);
 114
 115                 if ((result == -1) && (errno == EAGAIN))
 116                         return -1;
 117                 else if (result < 1)
 118                         return 0;
 119
 120                 /* XXX: The core is more than happy to split lines purely on an \n
 121                  * rather than a \r\n. This is good for us as it means that the size
 122                  * of data we are receiving is exactly the same as the size of data
 123                  * we asked for, and we dont need to re-implement our own socket
 124                  * buffering (See below)
 125                  */
 126                 for (int n = 0; n < result; n++)
 127                         if (buffer[n] == 0)
 128                                 buffer[n] = '\n';
 129
 130                 readresult = result;
 131                 return result;
 132         }
 133
 134         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 135         {
 136                 User* user = dynamic_cast<User*>(ServerInstance->FindDescriptor(fd));
 137
 138                 if (user == NULL)
 139                         return -1;
 140
 141                 /* We want to alter the buffer, so we have to make a copy */
 142                 char * tmpbuffer = new char[count + 1];
 143                 memcpy(tmpbuffer, buffer, count);
 144
 145                 /* XXX: This will actually generate lines "looking\0\0like\0\0this"
 146                  * rather than lines "looking\0like\0this". This shouldnt be a problem
 147                  * to the client, but it saves us a TON of processing and the need
 148                  * to re-implement socket buffering, as the data we are sending is
 149                  * exactly the same length as the data we are receiving.
 150                  */
 151                 for (int n = 0; n < count; n++)
 152                         if ((tmpbuffer[n] == '\r') || (tmpbuffer[n] == '\n'))
 153                                 tmpbuffer[n] = 0;
 154
 155                 user->AddWriteBuf(std::string(tmpbuffer,count));
 156                 delete [] tmpbuffer;
 157
 158                 return 1;
 159         }
 160
 161 };
 162
 163 MODULE_INIT(ModuleXMLSocket)
 164