src/socketengines/socketengine_ports.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/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         MAX_DESCRIPTORS = 0;
  23         EngineHandle = port_create();
  24
  25         if (EngineHandle == -1)
  26         {
  27                 ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: Could not initialize socket engine: %s", strerror(errno));
  28                 ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: This is a fatal error, exiting now.");
  29                 printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
  30                 printf("ERROR: This is a fatal error, exiting now.\n");
  31                 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
  32         }
  33         CurrentSetSize = 0;
  34
  35         ref = new EventHandler* [GetMaxFds()];
  36         events = new port_event_t[GetMaxFds()];
  37         memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
  38 }
  39
  40 PortsEngine::~PortsEngine()
  41 {
  42         this->Close(EngineHandle);
  43         delete[] ref;
  44         delete[] events;
  45 }
  46
  47 bool PortsEngine::AddFd(EventHandler* eh)
  48 {
  49         int fd = eh->GetFd();
  50         if ((fd < 0) || (fd > GetMaxFds() - 1))
  51                 return false;
  52
  53         if (GetRemainingFds() <= 1)
  54                 return false;
  55
  56         if (ref[fd])
  57                 return false;
  58
  59         ref[fd] = eh;
  60         port_associate(EngineHandle, PORT_SOURCE_FD, fd, eh->Readable() ? POLLRDNORM : POLLWRNORM, eh);
  61
  62         ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
  63         CurrentSetSize++;
  64         return true;
  65 }
  66
  67 void PortsEngine::WantWrite(EventHandler* eh)
  68 {
  69         port_associate(EngineHandle, PORT_SOURCE_FD, eh->GetFd(), POLLRDNORM | POLLWRNORM, eh);
  70 }
  71
  72 bool PortsEngine::DelFd(EventHandler* eh, bool force)
  73 {
  74         int fd = eh->GetFd();
  75         if ((fd < 0) || (fd > GetMaxFds() - 1))
  76                 return false;
  77
  78         port_dissociate(EngineHandle, PORT_SOURCE_FD, fd);
  79
  80         CurrentSetSize--;
  81         ref[fd] = NULL;
  82
  83         ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
  84         return true;
  85 }
  86
  87 int PortsEngine::GetMaxFds()
  88 {
  89         if (MAX_DESCRIPTORS)
  90                 return MAX_DESCRIPTORS;
  91
  92         int max = ulimit(4, 0);
  93         if (max > 0)
  94         {
  95                 MAX_DESCRIPTORS = max;
  96                 return max;
  97         }
  98         else
  99         {
 100                 ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
 101                 printf("ERROR: Can't determine maximum number of open sockets!\n");
 102                 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
 103         }
 104 #include <ulimit.h>
 105 }
 106
 107 int PortsEngine::GetRemainingFds()
 108 {
 109         return GetMaxFds() - CurrentSetSize;
 110 }
 111
 112 int PortsEngine::DispatchEvents()
 113 {
 114         struct timespec poll_time;
 115
 116         poll_time.tv_sec = 1;
 117         poll_time.tv_nsec = 0;
 118
 119         unsigned int nget = 1; // used to denote a retrieve request.
 120         int i = port_getn(EngineHandle, this->events, GetMaxFds() - 1, &nget, &poll_time);
 121
 122         // first handle an error condition
 123         if (i == -1)
 124                 return i;
 125
 126         TotalEvents += nget;
 127
 128         for (i = 0; i < nget; i++)
 129         {
 130                 switch (this->events[i].portev_source)
 131                 {
 132                         case PORT_SOURCE_FD:
 133                         {
 134                                 int fd = this->events[i].portev_object;
 135                                 if (ref[fd])
 136                                 {
 137                                         // reinsert port for next time around
 138                                         port_associate(EngineHandle, PORT_SOURCE_FD, fd, POLLRDNORM, ref[fd]);
 139                                         if ((this->events[i].portev_events & POLLRDNORM))
 140                                                 ReadEvents++;
 141                                         else
 142                                                 WriteEvents++;
 143                                         ref[fd]->HandleEvent((this->events[i].portev_events & POLLRDNORM) ? EVENT_READ : EVENT_WRITE);
 144                                 }
 145                         }
 146                         default:
 147                         break;
 148                 }
 149         }
 150
 151         return i;
 152 }
 153
 154 std::string PortsEngine::GetName()
 155 {
 156         return "ports";
 157 }
 158