1.\" Copyright (c) 1996-1999 Whistle Communications, Inc. 2.\" All rights reserved. 3.\" 4.\" Subject to the following obligations and disclaimer of warranty, use and 5.\" redistribution of this software, in source or object code forms, with or 6.\" without modifications are expressly permitted by Whistle Communications; 7.\" provided, however, that: 8.\" 1. Any and all reproductions of the source or object code must include the 9.\" copyright notice above and the following disclaimer of warranties; and 10.\" 2. No rights are granted, in any manner or form, to use Whistle 11.\" Communications, Inc. trademarks, including the mark "WHISTLE 12.\" COMMUNICATIONS" on advertising, endorsements, or otherwise except as 13.\" such appears in the above copyright notice or in the software. 14.\" 15.\" THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 16.\" TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 17.\" REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 18.\" INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 19.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 20.\" WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 21.\" REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 22.\" SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 23.\" IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 24.\" RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 25.\" WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 26.\" PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 27.\" SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 31.\" OF SUCH DAMAGE. 32.\" 33.\" $FreeBSD$ 34.\" $Whistle: nghook.8,v 1.4 1999/01/20 03:19:45 archie Exp $ 35.\" 36.Dd January 19, 1999 37.Dt NGHOOK 8 38.Os 39.Sh NAME 40.Nm nghook 41.Nd connect to a 42.Xr netgraph 4 43node 44.Sh SYNOPSIS 45.Nm 46.Op Fl a 47.Op Fl d 48.Op Fl l 49.Op Fl n 50.Ar path 51.Op Ar hookname 52.Sh DESCRIPTION 53.Nm 54creates a 55.Xr ng_socket 4 56socket type node and connects it to hook 57.Ar hookname 58of the node found at 59.Ar path . 60If 61.Ar hookname 62is omitted, 63.Dq debug 64is assumed. 65.Pp 66At this point all data written to standard input is sent 67to the node and all data received from the node is relayed 68to standard output. 69.Nm 70exits when 71.Dv EOF 72is detected on standard input. 73.Pp 74The options are as follows: 75.Pp 76.Bl -tag -width indent 77.It Fl a 78Output each packet read in human-readable decoded 79.Tn ASCII 80form instead of raw binary. 81.It Fl d 82Increase the debugging verbosity level. 83.It Fl l 84Loops all received data back to the hook in addition to writing it 85to standard output. 86.It Fl n 87Don't attempt to read any data from standard input. 88.Nm 89will continue reading from the node until stopped by a signal. 90.El 91.Sh BUGS 92Although all input is read in unbuffered mode, 93there's no way to control the packetization of the input. 94.Sh SEE ALSO 95.Xr netgraph 3 , 96.Xr netgraph 4 , 97.Xr ngctl 8 98.Sh HISTORY 99The 100.Em netgraph 101system was designed and first implemented at Whistle Communications, Inc.\& 102in a version of 103.Fx 2.2 104customized for the Whistle InterJet. 105.Sh AUTHORS 106.An Archie Cobbs Aq archie@whistle.com 107