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Add ng_ip_input. A new netgraph node for queuing IP packets into the

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main IP input processing code.
This commit is contained in:
Brooks Davis 2001-09-27 21:54:27 +00:00
parent bfa939da71
commit c2eed10556
8 changed files with 330 additions and 0 deletions
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1
share/man/man4/Makefile
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@ -93,6 +93,7 @@ MAN= aac.4 \
ng_gif.4 \
ng_hole.4 \
ng_iface.4 \
ng_ip_input.4 \
ng_ksocket.4 \
ng_lmi.4 \
ng_mppc.4 \

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share/man/man4/ng_ip_input.4 Normal file
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@ -0,0 +1,102 @@
.\" Copyright 2001 The Aerospace Corporation. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions, and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions, and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. The name of The Aerospace Corporation may not be used to endorse or
.\" promote products derived from this software.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" Copyright (c) 1996-1999 Whistle Communications, Inc.
.\" All rights reserved.
.\"
.\" Subject to the following obligations and disclaimer of warranty, use and
.\" redistribution of this software, in source or object code forms, with or
.\" without modifications are expressly permitted by Whistle Communications;
.\" provided, however, that:
.\" 1. Any and all reproductions of the source or object code must include the
.\" copyright notice above and the following disclaimer of warranties; and
.\" 2. No rights are granted, in any manner or form, to use Whistle
.\" Communications, Inc. trademarks, including the mark "WHISTLE
.\" COMMUNICATIONS" on advertising, endorsements, or otherwise except as
.\" such appears in the above copyright notice or in the software.
.\"
.\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
.\" TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
.\" REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
.\" INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
.\" WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
.\" REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
.\" SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
.\" IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
.\" RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
.\" WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
.\" PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
.\" SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
.\" OF SUCH DAMAGE.
.\"
.\" Author: Brooks Davis <brooks@FreeBSD.org>
.\" Derived from: ng_hole.4
.\"
.\" $FreeBSD$
.\"
.Dd September 27, 2001
.Dt NG_IP_INPUT 4
.Os
.Sh NAME
.Nm ng_ip_input
.Nd netgraph IP input node type
.Sh SYNOPSIS
.Fd #include <netgraph/ng_ip_input.h>
.Sh DESCRIPTION
The
.Nm ip_input
node type takes all recieved packets and queues them into the IP in
input processing subsystem.
.Sh HOOKS
A
.Nm
node accepts any request to connect, regardless of the hook name,
as long as the name is unique.
.Sh CONTROL MESSAGES
This node type supports only the generic control messages.
Other control messages are silently discarded.
.Sh SHUTDOWN
This node shuts down upon receipt of a
.Dv NGM_SHUTDOWN
control message, or when all hooks have been disconnected.
.Sh SEE ALSO
.Xr netgraph 4 ,
.Xr ngctl 8
.Sh HISTORY
The
.Nm
node type was implemented in
.Fx 5.0 .
.Sh AUTHORS
.An Brooks Davis Aq brooks@FreeBSD.org
.Sh BUGS
The
.Nm
node type should probably keep some sort of statistics.

1
sys/conf/files
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@ -1033,6 +1033,7 @@ netgraph/ng_gif.c optional netgraph_gif
netgraph/ng_gif_demux.c optional netgraph_gif_demux
netgraph/ng_hole.c optional netgraph_hole
netgraph/ng_iface.c optional netgraph_iface
netgraph/ng_ip_input.c optional netgraph_ip_input
netgraph/ng_ksocket.c optional netgraph_ksocket
netgraph/ng_lmi.c optional netgraph_lmi
netgraph/ng_mppc.c optional netgraph_mppc_compression

1
sys/conf/options
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@ -315,6 +315,7 @@ NETGRAPH_GIF opt_netgraph.h
NETGRAPH_GIF_DEMUX opt_netgraph.h
NETGRAPH_HOLE opt_netgraph.h
NETGRAPH_IFACE opt_netgraph.h
NETGRAPH_IP_INPUT opt_netgraph.h
NETGRAPH_KSOCKET opt_netgraph.h
NETGRAPH_LMI opt_netgraph.h
# MPPC compression requires proprietary files (not included)

1
sys/modules/netgraph/Makefile
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@ -13,6 +13,7 @@ SUBDIR= async \
gif_demux \
hole \
iface \
ip_input \
ksocket \
lmi \
netgraph \

7
sys/modules/netgraph/ip_input/Makefile Normal file
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@ -0,0 +1,7 @@
# $FreeBSD$
KMOD= ng_ip_input
SRCS= ng_ip_input.c
NOMAN=
.include <bsd.kmod.mk>

142
sys/netgraph/ng_ip_input.c Normal file
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@ -0,0 +1,142 @@
/*
* ng_ip_input.c
*
* Copyright 2001 The Aerospace Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions, and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of The Aerospace Corporation may not be used to endorse or
* promote products derived from this software.
*
* THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Brooks Davis <brooks@FreeBSD.org>
* Derived from: ng_hole.c
*
* $FreeBSD$
*/
/*
* This node simply takes IP packets and calls ip_input on them
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <net/netisr.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_ip_input.h>
/* Netgraph methods */
static ng_constructor_t ngipi_cons;
static ng_rcvdata_t ngipi_rcvdata;
static ng_disconnect_t ngipi_disconnect;
static struct ng_type typestruct = {
NG_ABI_VERSION,
NG_IP_INPUT_NODE_TYPE,
NULL, /* modeventhand_t */
ngipi_cons, /* ng_constructor_t */
NULL, /* ng_rcvmsg_t */
NULL, /* ng_shutdown_t */
NULL, /* ng_newhook_t */
NULL, /* ng_findhook_t */
NULL, /* ng_connect_t */
ngipi_rcvdata, /* ng_rcvdata_t */
ngipi_disconnect, /* ng_disconnect_t */
NULL /* ng_cmdlist */
};
NETGRAPH_INIT(ip_input, &typestruct);
/*
* Be obliging. but no work to do.
*/
static int
ngipi_cons(node_p node)
{
return(0);
}
/*
* Receive data
*/
static int
ngipi_rcvdata(hook_p hook, item_p item)
{
struct mbuf *m;
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
schednetisr(NETISR_IP);
(void) IF_HANDOFF(&ipintrq, m, NULL);
return 0;
}
/*
* Hook disconnection
*/
static int
ngipi_disconnect(hook_p hook)
{
if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
}

75
sys/netgraph/ng_ip_input.h Normal file
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@ -0,0 +1,75 @@
/*
* ng_ip_input.h
*
* Copyright 2001 The Aerospace Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions, and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of The Aerospace Corporation may not be used to endorse or
* promote products derived from this software.
*
* THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Brooks Davis <brooks@FreeBSD.org>
* Derived from: ng_hole.h
*
* $FreeBSD$
*/
#ifndef _NETGRAPH_IP_INPUT_H_
#define _NETGRAPH_IP_INPUT_H_
/* Node type name and magic cookie */
#define NG_IP_INPUT_NODE_TYPE "ip_input"
#define NGM_IP_INPUT_COOKIE 994874907
#endif /* _NETGRAPH_IP_INPUT_H_ */