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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "socketengine_iocp.h"
#include <mswsock.h>
IOCPEngine::IOCPEngine(InspIRCd * Instance) : SocketEngine(Instance)
{
/* Create completion port */
m_completionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, (ULONG_PTR)0, 0);
/* Null variables out. */
CurrentSetSize = 0;
EngineHandle = 0;
memset(ref, 0, sizeof(EventHandler*) * MAX_DESCRIPTORS);
}
IOCPEngine::~IOCPEngine()
{
CloseHandle(m_completionPort);
}
bool IOCPEngine::AddFd(EventHandler* eh)
{
int fake_fd = GenerateFd(eh->GetFd());
int is_accept = 0;
int opt_len = sizeof(int);
if(fake_fd < 0)
return false;
/* are we a listen socket? */
getsockopt(eh->GetFd(), SOL_SOCKET, SO_ACCEPTCONN, (char*)&is_accept, &opt_len);
/* set up the read event so the socket can actually receive data :P */
eh->m_internalFd = fake_fd;
eh->m_writeEvent = 0;
eh->m_acceptEvent = 0;
unsigned long completion_key = (ULONG_PTR)eh->m_internalFd;
/* assign the socket to the completion port */
if(!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, completion_key, 0))
return false;
/* set up binding, increase set size */
ref[fake_fd] = eh;
++CurrentSetSize;
/* setup initial events */
if(is_accept)
PostAcceptEvent(eh);
else
PostReadEvent(eh);
/* log message */
ServerInstance->Log(DEBUG, "New fake fd: %u, real fd: %u, address 0x%p", fake_fd, eh->GetFd(), eh);
/* post a write event if there is data to be written */
if(eh->Writeable())
WantWrite(eh);
/* we're all good =) */
try
{
m_binding.insert( map<int, EventHandler*>::value_type( eh->GetFd(), eh ) );
}
catch (...)
{
/* Ohshi-, map::insert failed :/ */
return false;
}
return true;
}
bool IOCPEngine::DelFd(EventHandler* eh, bool force /* = false */)
{
int fake_fd = eh->m_internalFd;
int fd = eh->GetFd();
if(ref[fake_fd] == 0)
return false;
ServerInstance->Log(DEBUG, "Removing fake fd %u, real fd %u, address 0x%p", fake_fd, eh->GetFd(), eh);
/* Cancel pending i/o operations. */
if (CancelIo((HANDLE)fd) == FALSE)
return false;
/* Free the buffer, and delete the event. */
if(eh->m_readEvent != 0)
{
if(((Overlapped*)eh->m_readEvent)->m_params != 0)
delete ((udp_overlap*)((Overlapped*)eh->m_readEvent)->m_params);
delete ((Overlapped*)eh->m_readEvent);
}
if(eh->m_writeEvent != 0)
delete ((Overlapped*)eh->m_writeEvent);
if(eh->m_acceptEvent != 0)
{
delete ((accept_overlap*)((Overlapped*)eh->m_acceptEvent)->m_params);
delete ((Overlapped*)eh->m_acceptEvent);
}
/* Clear binding */
ref[fake_fd] = 0;
m_binding.erase(eh->GetFd());
/* decrement set size */
--CurrentSetSize;
/* success */
return true;
}
void IOCPEngine::WantWrite(EventHandler* eh)
{
/* Post event - write begin */
if(!eh->m_writeEvent)
{
ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);
eh->m_writeEvent = (void*)ov;
PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
}
}
bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)
{
Overlapped * ov = new Overlapped(type, param);
ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
return PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
}
void IOCPEngine::PostReadEvent(EventHandler * eh)
{
Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_READ_READY, 0);
DWORD flags = 0;
DWORD r_length = 0;
WSABUF buf;
/* by passing a null buffer pointer, we can have this working in the same way as epoll..
* its slower, but it saves modifying all network code.
*/
buf.buf = 0;
buf.len = 0;
/* determine socket type. */
DWORD sock_type;
int sock_len = sizeof(DWORD);
if(getsockopt(eh->GetFd(), SOL_SOCKET, SO_TYPE, (char*)&sock_type, &sock_len) == -1)
{
/* wtfhax? */
PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
delete ov;
return;
}
switch(sock_type)
{
case SOCK_DGRAM: /* UDP Socket */
{
udp_overlap * uv = new udp_overlap;
uv->udp_sockaddr_len = sizeof(sockaddr);
buf.buf = (char*)uv->udp_buffer;
buf.len = sizeof(uv->udp_buffer);
ov->m_params = (unsigned long)uv;
if(WSARecvFrom(eh->GetFd(), &buf, 1, &uv->udp_len, &flags, uv->udp_sockaddr, (LPINT)&uv->udp_sockaddr_len, &ov->m_overlap, 0))
{
int err = WSAGetLastError();
if(err != WSA_IO_PENDING)
{
delete ov;
PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
return;
}
}
}
break;
case SOCK_STREAM: /* TCP Socket */
{
if(WSARecv(eh->GetFd(), &buf, 1, &r_length, &flags, &ov->m_overlap, 0) == SOCKET_ERROR)
{
if(WSAGetLastError() != WSA_IO_PENDING)
{
delete ov;
PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
return;
}
}
}
break;
default:
{
printf("unknwon socket type: %u\n", sock_type);
return;
}
break;
}
eh->m_readEvent = (void*)ov;
}
int IOCPEngine::DispatchEvents()
{
DWORD len;
LPOVERLAPPED overlap;
Overlapped * ov;
EventHandler * eh;
ULONG_PTR intfd;
int ret;
unsigned long bytes_recv;
while(GetQueuedCompletionStatus(m_completionPort, &len, &intfd, &overlap, 1000))
{
// woot, we got an event on a socket :P
eh = ref[intfd];
ov = CONTAINING_RECORD(overlap, Overlapped, m_overlap);
if(eh == 0) continue;
switch(ov->m_event)
{
case SOCKET_IO_EVENT_WRITE_READY:
{
eh->m_writeEvent = 0;
eh->HandleEvent(EVENT_WRITE, 0);
}
break;
case SOCKET_IO_EVENT_READ_READY:
{
if(ov->m_params)
{
// if we had params, it means we are a udp socket with a udp_overlap pointer in this long.
udp_overlap * uv = (udp_overlap*)ov->m_params;
uv->udp_len = len;
this->udp_ov = uv;
eh->m_readEvent = 0;
eh->HandleEvent(EVENT_READ, 0);
this->udp_ov = 0;
delete uv;
PostReadEvent(eh);
}
else
{
ret = ioctlsocket(eh->GetFd(), FIONREAD, &bytes_recv);
eh->m_readEvent = 0;
if(ret != 0 || bytes_recv == 0)
{
/* end of file */
PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, EIO); /* Old macdonald had an error, EIEIO. */
}
else
{
eh->HandleEvent(EVENT_READ, 0);
PostReadEvent(eh);
}
}
}
break;
case SOCKET_IO_EVENT_ACCEPT:
{
/* this is kinda messy.. :/ */
eh->HandleEvent(EVENT_READ, ov->m_params);
delete ((accept_overlap*)ov->m_params);
eh->m_acceptEvent = 0;
PostAcceptEvent(eh);
}
break;
case SOCKET_IO_EVENT_ERROR:
{
eh->HandleEvent(EVENT_ERROR, ov->m_params);
}
break;
}
delete ov;
}
return 0;
}
void IOCPEngine::PostAcceptEvent(EventHandler * eh)
{
int fd = WSASocket(AF_INET, SOCK_STREAM, 0, 0, 0, WSA_FLAG_OVERLAPPED);
int len = sizeof(sockaddr_in) + 16;
DWORD dwBytes;
accept_overlap* ao = new accept_overlap;
memset(ao->buf, 0, 1024);
ao->socket = fd;
Overlapped* ov = new Overlapped(SOCKET_IO_EVENT_ACCEPT, (int)ao);
eh->m_acceptEvent = (void*)ov;
if(AcceptEx(eh->GetFd(), fd, ao->buf, 0, len, len, &dwBytes, &ov->m_overlap) == FALSE)
{
int err = WSAGetLastError();
if(err != WSA_IO_PENDING)
{
printf("PostAcceptEvent err: %d\n", err);
}
}
}
std::string IOCPEngine::GetName()
{
return "iocp";
}
int __accept_socket(SOCKET s, sockaddr * addr, int * addrlen, void * acceptevent)
{
Overlapped* ovl = (Overlapped*)acceptevent;
accept_overlap* ov = (accept_overlap*)ovl->m_params;
sockaddr_in* server_address = (sockaddr_in*)&ov->buf[10];
sockaddr_in* client_address = (sockaddr_in*)&ov->buf[38];
memcpy(addr, client_address, sizeof(sockaddr_in));
*addrlen = sizeof(sockaddr_in);
return ov->socket;
}
int __getsockname(SOCKET s, sockaddr * name, int * namelen, void * acceptevent)
{
Overlapped* ovl = (Overlapped*)acceptevent;
accept_overlap* ov = (accept_overlap*)ovl->m_params;
sockaddr_in* server_address = (sockaddr_in*)&ov->buf[10];
sockaddr_in* client_address = (sockaddr_in*)&ov->buf[38];
memcpy(name, server_address, sizeof(sockaddr_in));
*namelen = sizeof(sockaddr_in);
return 0;
}
int __recvfrom(SOCKET s, char * buf, int len, int flags, struct sockaddr * from, int * fromlen, udp_overlap * ov)
{
memcpy(buf, ov->udp_buffer, ov->udp_len);
memcpy(from, ov->udp_sockaddr, *fromlen);
return ov->udp_len;
}
EventHandler * IOCPEngine::GetRef(int fd)
{
map<int, EventHandler*>::iterator itr = m_binding.find(fd);
return (itr == m_binding.end()) ? 0 : itr->second;
}
bool IOCPEngine::HasFd(int fd)
{
return (GetRef(fd) != 0);
}
EventHandler * IOCPEngine::GetIntRef(int fd)
{
if(fd < 0 || fd > MAX_DESCRIPTORS)
return 0;
return ref[fd];
}
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