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/*
kHTTPd -- the next generation
Accept connections
*/
/****************************************************************
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
****************************************************************/
#include "structure.h"
#include "prototypes.h"
#include "sysctl.h"
#include <linux/smp_lock.h>
/*
Purpose:
AcceptConnections puts all "accepted" connections in the
"WaitForHeader" queue.
Return value:
The number of accepted connections
*/
int AcceptConnections(const int CPUNR, struct socket *Socket)
{
struct http_request *NewRequest;
struct socket *NewSock;
int count = 0;
int error;
EnterFunction("AcceptConnections");
if (atomic_read(&ConnectCount)>sysctl_khttpd_maxconnect)
{
LeaveFunction("AcceptConnections - to many active connections");
return 0;
}
if (Socket==NULL) return 0;
/*
Quick test to see if there are connections on the queue.
This is cheaper than accept() itself because this saves us
the allocation of a new socket. (Which doesn't seem to be
used anyway)
*/
if (Socket->sk->tp_pinfo.af_tcp.accept_queue==NULL)
{
return 0;
}
error = 0;
while (error>=0)
{
NewSock = sock_alloc();
if (NewSock==NULL)
break;
NewSock->type = Socket->type;
NewSock->ops = Socket->ops;
error = Socket->ops->accept(Socket,NewSock,O_NONBLOCK);
if (error<0)
{
sock_release(NewSock);
break;
}
if (NewSock->sk->state==TCP_CLOSE)
{
sock_release(NewSock);
continue;
}
/* Allocate a request-entry for the connection */
NewRequest = kmalloc(sizeof(struct http_request),(int)GFP_KERNEL);
if (NewRequest == NULL)
{
Send50x(NewSock); /* Service not available. Try again later */
sock_release(NewSock);
break;
}
memset(NewRequest,0,sizeof(struct http_request));
NewRequest->sock = NewSock;
NewRequest->Next = threadinfo[CPUNR].WaitForHeaderQueue;
init_waitqueue_entry(&NewRequest->sleep,current);
add_wait_queue(NewSock->sk->sleep,&(NewRequest->sleep));
threadinfo[CPUNR].WaitForHeaderQueue = NewRequest;
atomic_inc(&ConnectCount);
count++;
}
LeaveFunction("AcceptConnections");
return count;
}
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