src/socketengines/socketengine_ports.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 #include "exitcodes.h"
  16 #include <port.h>
  17 #include "socketengines/socketengine_ports.h"
  18 #include <ulimit.h>
  19
  20 PortsEngine::PortsEngine(InspIRCd* Instance) : SocketEngine(Instance)
  21 {
  22         EngineHandle = port_create();
  23
  24         if (EngineHandle == -1)
  25         {
  26                 ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: Could not initialize socket engine: %s", strerror(errno));
  27                 ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: This is a fatal error, exiting now.");
  28                 printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
  29                 printf("ERROR: This is a fatal error, exiting now.\n");
  30                 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
  31         }
  32         CurrentSetSize = 0;
  33
  34         ref = new EventHandler* [GetMaxFds()];
  35         events = new port_event_t[GetMaxFds()];
  36         memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
  37 }
  38
  39 PortsEngine::~PortsEngine()
  40 {
  41         this->Close(EngineHandle);
  42         delete[] ref;
  43         delete[] events;
  44 }
  45
  46 bool PortsEngine::AddFd(EventHandler* eh)
  47 {
  48         int fd = eh->GetFd();
  49         if ((fd < 0) || (fd > GetMaxFds() - 1))
  50                 return false;
  51
  52         if (GetRemainingFds() <= 1)
  53                 return false;
  54
  55         if (ref[fd])
  56                 return false;
  57
  58         ref[fd] = eh;
  59         port_associate(EngineHandle, PORT_SOURCE_FD, fd, eh->Readable() ? POLLRDNORM : POLLWRNORM, eh);
  60
  61         ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
  62         CurrentSetSize++;
  63         return true;
  64 }
  65
  66 void PortsEngine::WantWrite(EventHandler* eh)
  67 {
  68         port_associate(EngineHandle, PORT_SOURCE_FD, eh->GetFd(), POLLWRNORM, eh);
  69 }
  70
  71 bool PortsEngine::DelFd(EventHandler* eh, bool force)
  72 {
  73         int fd = eh->GetFd();
  74         if ((fd < 0) || (fd > GetMaxFds() - 1))
  75                 return false;
  76
  77         port_dissociate(EngineHandle, PORT_SOURCE_FD, fd);
  78
  79         CurrentSetSize--;
  80         ref[fd] = NULL;
  81
  82         ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
  83         return true;
  84 }
  85
  86 int PortsEngine::GetMaxFds()
  87 {
  88         if (MAX_DESCRIPTORS)
  89                 return MAX_DESCRIPTORS;
  90
  91         int max = ulimit(4, 0);
  92         if (max > 0)
  93         {
  94                 MAX_DESCRIPTORS = max;
  95                 return max;
  96         }
  97         else
  98         {
  99                 ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
 100                 printf("ERROR: Can't determine maximum number of open sockets!\n");
 101                 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
 102         }
 103 #include <ulimit.h>
 104 }
 105
 106 int PortsEngine::GetRemainingFds()
 107 {
 108         return GetMaxFds() - CurrentSetSize;
 109 }
 110
 111 int PortsEngine::DispatchEvents()
 112 {
 113         struct timespec poll_time;
 114
 115         poll_time.tv_sec = 1;
 116         poll_time.tv_nsec = 0;
 117
 118         unsigned int nget = 1; // used to denote a retrieve request.
 119         int i = port_getn(EngineHandle, this->events, GetMaxFds() - 1, &nget, &poll_time);
 120
 121         // first handle an error condition
 122         if (i == -1)
 123                 return i;
 124
 125         TotalEvents += nget;
 126
 127         for (i = 0; i < nget; i++)
 128         {
 129                 switch (this->events[i].portev_source)
 130                 {
 131                         case PORT_SOURCE_FD:
 132                         {
 133                                 int fd = this->events[i].portev_object;
 134                                 if (ref[fd])
 135                                 {
 136                                         // reinsert port for next time around
 137                                         port_associate(EngineHandle, PORT_SOURCE_FD, fd, POLLRDNORM, ref[fd]);
 138                                         if ((this->events[i].portev_events & POLLRDNORM))
 139                                                 ReadEvents++;
 140                                         else
 141                                                 WriteEvents++;
 142                                         ref[fd]->HandleEvent((this->events[i].portev_events & POLLRDNORM) ? EVENT_READ : EVENT_WRITE);
 143                                 }
 144                         }
 145                         default:
 146                         break;
 147                 }
 148         }
 149
 150         return i;
 151 }
 152
 153 std::string PortsEngine::GetName()
 154 {
 155         return "ports";
 156 }
 157