| accf_http.9 (68795) | accf_http.9 (68853) |
|---|---|
| 1.\" 2.\" Copyright (c) 2000 Alfred Perlstein 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" | 1.\" 2.\" Copyright (c) 2000 Alfred Perlstein 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/share/man/man9/accf_http.9 68795 2000-11-15 22:46:21Z alfred $ | 26.\" $FreeBSD: head/share/man/man9/accf_http.9 68853 2000-11-17 09:16:29Z ben $ |
| 27.\" " 28.Dd November 15, 2000 29.Os FreeBSD 30.Dt accf_http 9 31.Sh NAME 32.Nm accf_http 33.Nd buffer incoming connections until a certain complete HTTP requests arrive 34.Sh SYNOPSIS 35.Nm options INET 36.Nm options ACCEPT_FILTER_HTTP 37.Nm kldload accf_http 38.Sh DESCRIPTION 39This is a filter to be placed on an socket that will be using 40.Fn accept | 27.\" " 28.Dd November 15, 2000 29.Os FreeBSD 30.Dt accf_http 9 31.Sh NAME 32.Nm accf_http 33.Nd buffer incoming connections until a certain complete HTTP requests arrive 34.Sh SYNOPSIS 35.Nm options INET 36.Nm options ACCEPT_FILTER_HTTP 37.Nm kldload accf_http 38.Sh DESCRIPTION 39This is a filter to be placed on an socket that will be using 40.Fn accept |
| 41to recieve incomming HTTP connections. | 41to receive incoming HTTP connections. |
| 42.Pp | 42.Pp |
| 43It prevents the application from recieving the a connected descriptor via | 43It prevents the application from receiving the connected descriptor via |
| 44.Fn accept 45until either a full HTTP/1.0 or HTTP/1.1 HEAD or GET request has 46been buffered by the kernel. 47.Pp 48If something other than a HTTP/1.0 or | 44.Fn accept 45until either a full HTTP/1.0 or HTTP/1.1 HEAD or GET request has 46been buffered by the kernel. 47.Pp 48If something other than a HTTP/1.0 or |
| 49HTTP/1.1 HEAD or GET request is recieved the kernel will 50allow the application to recieve the connection descriptor | 49HTTP/1.1 HEAD or GET request is received the kernel will 50allow the application to receive the connection descriptor |
| 51via 52.Fn accept . 53.Pp 54The utlity of 55.Xr accf_http 9 56is such that a server will not have to context switch several times 57before performing the initial parsing of the request. 58This effectively reduces the amount of required CPU utilization --- 39 unchanged lines hidden --- | 51via 52.Fn accept . 53.Pp 54The utlity of 55.Xr accf_http 9 56is such that a server will not have to context switch several times 57before performing the initial parsing of the request. 58This effectively reduces the amount of required CPU utilization --- 39 unchanged lines hidden --- |