patch-2.3.14 linux/net/khttpd/accept.c

• Lines: 138
• Date: Wed Aug 18 09:45:10 1999
• Orig file: v2.3.13/linux/net/khttpd/accept.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.13/linux/net/khttpd/accept.c linux/net/khttpd/accept.c
@@ -0,0 +1,137 @@
+/*
+
+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)
+	*/
+	lock_sock(Socket->sk);
+   	if (Socket->sk->tp_pinfo.af_tcp.syn_wait_queue==NULL)
+	{
+	  	release_sock(Socket->sk);
+		return 0;
+	}
+	release_sock(Socket->sk);
+	
+	error = 0;	
+	while (error>=0)
+	{
+		NewSock = sock_alloc();
+		if (NewSock==NULL)
+			break;
+			
+		lock_kernel(); 	/* Required for the TCPIP-stack in 2.3.13 */
+				/* This is actually bogus, since accept() releases
+				   it immediatly again. This will be fixed
+				   eventually though. */
+			
+			
+		NewSock->type = Socket->type;
+		(void)Socket->ops->dup(NewSock,Socket);
+		
+		
+		error = Socket->ops->accept(Socket,NewSock,O_NONBLOCK);
+		
+		unlock_kernel();
+
+		if ((error<0)&&(NewSock!=NULL))
+		{
+			sock_release(NewSock);
+			break;
+		}
+		
+			
+		if (NewSock==NULL)
+			break;
+		
+		
+		
+		/* 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);
+			error = -1;
+			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;
+}