Slattach ported from 1.1.5 plus Bruce Evans suggested fix (close
FDs and fork before redialing) to prevent dialer from hanging with newer sio.c. Also moved history from the source to the cvs log (here) per David G's suggestion. This compiles but needs testing now... Rich /* * Hacks to support "-a|c|n" flags on the command line which enable VJ * header compresion and disable ICMP. * If this is good all rights go to B & L Jolitz, otherwise send your * comments to Reagan (/dev/null). * * nerd@percival.rain.com (Michael Galassi) 92.09.03 * * Hacked to change from sgtty to POSIX termio style serial line control * and added flag to enable cts/rts style flow control. * * blymn@awadi.com.au (Brett Lymn) 93.04.04 * * Put slattach in it's own process group so it can't be killed * accidentally. Close the connection on SIGHUP and SIGINT. Write a * syslog entry upon opening and closing the connection. Rich Murphey * and Brad Huntting. * * Add '-r command' option: runs 'command' upon recieving SIGHUP * resulting from loss of carrier. Log any errors after forking. * Rich 8/13/93 * * This version of slattach includes many changes by David Greenman, Brian * Smith, Chris Bradley, and me (Michael Galassi). None of them are * represented as functional anywhere outside of RAINet though they do work * for us. Documentation is limited to the usage message for now. If you * make improovments please pass them back. * * Added '-u UCMD' which runs 'UCMD <old> <new>' whenever the slip * unit number changes where <old> and <new> are the old and new unit * numbers, respectively. Also added the '-z' option which forces * invocation of the redial command (-r CMD) upon startup regardless * of whether the com driver claims (sometimes mistakenly) that * carrier is present. Also added '-e ECMD' which runs ECMD before * exiting. * * marc@escargot.rain.com (Marc Frajola) 93/09/10 * * Minor fixes to allow passive SLIP links to work (connections with * modem control that do not have an associated dial command). Added * code to re-check for carrier after dial command has been executed. * Added SIGTERM handler to properly handle normal kill signals. Fixed * bug in logic that caused message about no -u command to be logged * even when -u was specified and the sl number changes. Tried to get * rid of redundant syslog()'s to minimize console log output. Improved * logging of improper command line options or number of command * arguments. Removed spurious newline characters from syslog() calls. * * gjung@gjbsd.franken.de * * sighup_handler changed to set CLOCAL before running redial_cmd. * added flag exiting, so exit_handler is not run twice. Fork * before reopening tty. */
This commit is contained in:
Rich Murphey
parent
d091793974
commit
76a4cb22c6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=2235
@ -1,7 +1,10 @@
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# @(#)Makefile 8.1 (Berkeley) 6/5/93
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# from: @(#)Makefile 5.4 (Berkeley) 5/11/90
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# $Id: Makefile,v 1.6 1993/10/13 07:16:38 rgrimes Exp $
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PROG= slattach
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MAN8= slattach.8
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MLINKS= slattach.8 slip.8
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LDADD= -lutil
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DPADD= ${LIBUTIL}
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.include <bsd.prog.mk>
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@ -1,5 +1,5 @@
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.\" Copyright (c) 1986, 1991, 1993
|
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.\" The Regents of the University of California. All rights reserved.
|
||||
.\" Copyright (c) 1986, 1991 The Regents of the University of California.
|
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.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
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@ -29,17 +29,30 @@
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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.\" SUCH DAMAGE.
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||||
.\"
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.\" @(#)slattach.8 8.2 (Berkeley) 4/1/94
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.\" from: @(#)slattach.8 6.4 (Berkeley) 3/16/91
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.\"
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.Dd April 1, 1994
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.\" $Id: slattach.8,v 1.7 1993/10/13 07:16:39 rgrimes Exp $
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.\"
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.Dd April 4, 1993
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.Dt SLATTACH 8
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.Os BSD 4.3
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.Sh NAME
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.Nm slattach
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.Nd attach serial lines as network interfaces
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.Sh SYNOPSIS
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.Sh SYOPNSIS
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.Nm Slattach
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.Ar ttyname Op Ar baudrate
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.Op \-a
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.Op \-c
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.Op \-e exit-command
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.Op \-f
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.Op \-h
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.Op \-l
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.Op \-n
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.Op \-r redial-command
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.Op \-s baudrate
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.Op \-u unit-command
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.Op \-z
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.Ar ttyname
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.Sh DESCRIPTION
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.Nm Slattach
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is used to assign a tty line to a network interface,
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@ -47,16 +60,53 @@ and to define the network source and destination addresses.
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The following operands are supported by
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.Nm slattach :
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.Bl -tag -width Ar
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.It Ar \-a
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Autoenable the VJ header compression option, if the other end of the link
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is capable of VJ header compression then it will be used otherwise normal
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headers will be used.
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.It Ar \-c
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Enables the VJ header compression option. Note that both ends of the link
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must be able to use VJ header compression for this to work.
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.It Ar \-e exit-command
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Specifies a command to be invoked within a shell (sh -c exit-command)
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before slattach exits.
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.It Ar \-f
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Disables the invocation of daemon() to run slattach in the background.
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.It Ar \-h
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Turn on cts/rts style flow control on the slip port, by default no flow
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control is done.
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.It Ar \-l
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disable modem control (CLOCAL) and ignore carrier detect on the slip
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port. By default the redial-command is invoked upon carrier drop and
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slattach aborts if no redial-command is specified.
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.It Ar \-n
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Throw away ICMP packets. The slip interface will ignore ICMP packets
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to prevent slow lines being saturated by ICMP responses.
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.It Ar \-r redial-command
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Specifies a command to be invoked within a shell (sh -c
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redial-command) whenever carrier is lost on the line.
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.It Ar \-s baudrate
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Specifies the speed of the connection. If not specified, the
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default of 9600 is used.
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.It Ar \-u unit-command
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When the line is switched to slip discipline, run
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.Ql sh \-c unit-command <last> <current>
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where <last> and <current> are the slip unit numbers when the line was
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last opened and the unit number of the current slip connection
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respecitvely. The unit number can change after redialing if you are
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using more than one slip line. Slattach will abort if the unit number
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changes and
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.Ql \-u unit-command
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was not specified.
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.It Ar \-z
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forces redial
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redial-cmd upon startup irrespective of carrier.
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.It Ar ttyname
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Specifies the name of the tty device.
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.Ar Ttyname
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should be a string of the form
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.Ql ttyXX ,
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or
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.Ql /dev/ttyXX .
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.It Ar baudrate
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Specifies the speed of the connection. If not specified, the
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default of 9600 is used.
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should be a string of the form
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.Ql ttyXX or
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.Ql /dev/ttyXX.
|
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.El
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.Pp
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Only the super-user may attach a network interface.
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@ -65,19 +115,58 @@ To detach the interface, use
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.Dq Li ifconfig interface-name down
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after killing off the
|
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.Nm slattach
|
||||
process.
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||||
process using
|
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.Ql kill -INT .
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.Ar Interface-name
|
||||
is the name that is shown by
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.Xr netstat 1
|
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.Pp
|
||||
To setup slattach to redial the phone when carrier is lost, use the
|
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.Ql \-r redial-cmd
|
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option to specify a script or executable that will reconnect the
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serial line to the slip server. For example, the script could redial
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the server and log in, etc.
|
||||
.Pp
|
||||
To reconfigure the network interface in case the slip unit number
|
||||
changes, use the
|
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.Ql \-u unit-cmd
|
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option to specify a script or executable that will be invoked as
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.Ql sh \-c unit-cmd old new,
|
||||
where old and new are the slip unit numbers before and after
|
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reconnecting the line. The unit number can change if you have more
|
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than one line disconnect at the same time. The first to succeed in
|
||||
reconnecting will get the lowest unit number.
|
||||
.Pp
|
||||
To kill slattach use
|
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.Ql kill -INT
|
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(SIGINT) which causes it to close the tty and exit.
|
||||
.Pp
|
||||
To force a redial, use
|
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.Ql kill -HUP
|
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(SIGHUP) which causes slattach to think carrier was lost and thus invoke
|
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.Ql sh -c redial-command
|
||||
to reconnect to the server.
|
||||
.Pp
|
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If you use a hard-wired connection rather than a modem, invoke
|
||||
slattach with the
|
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.Ql \-l
|
||||
option in order to ignore carrier on the slip line.
|
||||
.Sh EXAMPLES
|
||||
.Bd -literal -offset indent -compact
|
||||
slattach ttyh8
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slattach /dev/tty01 4800
|
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slattach \-s 4800 /dev/tty01
|
||||
slattach \-c \-s 38400 /dev/sio01
|
||||
slattach \-r 'kermit -y dial.script >kermit.log 2>&1'
|
||||
.Ed
|
||||
.Sh DIAGNOSTICS
|
||||
Look for error messages in /var/log/messages (slattach is a daemon).
|
||||
Messages indicating the specified interface does not exit, the
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requested address is unknown, the user is not privileged and
|
||||
tried to alter an interface's configuration.
|
||||
requested address is unknown, the user is not privileged and tried to
|
||||
alter an interface's configuration are logged there. Slattach also
|
||||
logs failure to set the controlling terminal or failure to install
|
||||
signal handlers. Upon connection and redial the ttyname and baud rate
|
||||
are logged and on shutdown the ttyname is logged.
|
||||
.Pp
|
||||
.Sh SEE ALSO
|
||||
.Xr netstat 1 ,
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.Xr netintro 4 ,
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
/*
|
||||
* Copyright (c) 1988, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
* Copyright (c) 1988 Regents of the University of California.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* Rick Adams.
|
||||
@ -34,140 +34,439 @@
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Hacks to support "-a|c|n" flags on the command line which enable VJ
|
||||
* header compresion and disable ICMP.
|
||||
* If this is good all rights go to B & L Jolitz, otherwise send your
|
||||
* comments to Reagan (/dev/null).
|
||||
*
|
||||
* nerd@percival.rain.com (Michael Galassi) 92.09.03
|
||||
*
|
||||
* Hacked to change from sgtty to POSIX termio style serial line control
|
||||
* and added flag to enable cts/rts style flow control.
|
||||
*
|
||||
* blymn@awadi.com.au (Brett Lymn) 93.04.04
|
||||
*
|
||||
* Put slattach in it's own process group so it can't be killed
|
||||
* accidentally. Close the connection on SIGHUP and SIGINT. Write a
|
||||
* syslog entry upon opening and closing the connection. Rich Murphey
|
||||
* and Brad Huntting.
|
||||
*
|
||||
* Add '-r command' option: runs 'command' upon recieving SIGHUP
|
||||
* resulting from loss of carrier. Log any errors after forking.
|
||||
* Rich 8/13/93
|
||||
*
|
||||
* This version of slattach includes many changes by David Greenman, Brian
|
||||
* Smith, Chris Bradley, and me (Michael Galassi). None of them are
|
||||
* represented as functional anywhere outside of RAINet though they do work
|
||||
* for us. Documentation is limited to the usage message for now. If you
|
||||
* make improovments please pass them back.
|
||||
*
|
||||
* Added '-u UCMD' which runs 'UCMD <old> <new>' whenever the slip
|
||||
* unit number changes where <old> and <new> are the old and new unit
|
||||
* numbers, respectively. Also added the '-z' option which forces
|
||||
* invocation of the redial command (-r CMD) upon startup regardless
|
||||
* of whether the com driver claims (sometimes mistakenly) that
|
||||
* carrier is present. Also added '-e ECMD' which runs ECMD before
|
||||
* exiting.
|
||||
*
|
||||
* marc@escargot.rain.com (Marc Frajola) 93/09/10
|
||||
*
|
||||
* Minor fixes to allow passive SLIP links to work (connections with
|
||||
* modem control that do not have an associated dial command). Added
|
||||
* code to re-check for carrier after dial command has been executed.
|
||||
* Added SIGTERM handler to properly handle normal kill signals. Fixed
|
||||
* bug in logic that caused message about no -u command to be logged
|
||||
* even when -u was specified and the sl number changes. Tried to get
|
||||
* rid of redundant syslog()'s to minimize console log output. Improved
|
||||
* logging of improper command line options or number of command
|
||||
* arguments. Removed spurious newline characters from syslog() calls.
|
||||
*
|
||||
* gjung@gjbsd.franken.de
|
||||
*
|
||||
* sighup_handler changed to set CLOCAL before running redial_cmd.
|
||||
* added flag exiting, so exit_handler is not run twice.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef lint
|
||||
static char copyright[] =
|
||||
"@(#) Copyright (c) 1988, 1993\n\
|
||||
The Regents of the University of California. All rights reserved.\n";
|
||||
char copyright[] =
|
||||
"@(#) Copyright (c) 1988 Regents of the University of California.\n\
|
||||
All rights reserved.\n";
|
||||
#endif /* not lint */
|
||||
|
||||
#ifndef lint
|
||||
static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94";
|
||||
/*static char sccsid[] = "from: @(#)slattach.c 4.6 (Berkeley) 6/1/90";*/
|
||||
static char rcsid[] = "$Id";
|
||||
#endif /* not lint */
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sgtty.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <termios.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <net/if.h>
|
||||
#include <net/if_slvar.h>
|
||||
#include <netdb.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
#include <paths.h>
|
||||
#include <syslog.h>
|
||||
#include <signal.h>
|
||||
#include <strings.h>
|
||||
|
||||
extern int errno;
|
||||
extern char *sys_errlist[];
|
||||
|
||||
#define DEFAULT_BAUD 9600
|
||||
|
||||
void sighup_handler(); /* SIGHUP handler */
|
||||
void sigint_handler(); /* SIGINT handler */
|
||||
void sigterm_handler(); /* SIGTERM handler */
|
||||
void exit_handler(int ret); /* run exit_cmd iff specified upon exit. */
|
||||
void setup_line(); /* configure slip line */
|
||||
void attach_line(); /* switch to slip line discipline */
|
||||
|
||||
int fd = -1;
|
||||
char *dev = (char *)0;
|
||||
int slipdisc = SLIPDISC;
|
||||
int ttydisc = TTYDISC;
|
||||
int flow_control = 0; /* non-zero to enable hardware flow control. */
|
||||
int modem_control = 0; /* non-zero iff we watch carrier. */
|
||||
int comstate; /* TIOCMGET current state of serial driver */
|
||||
int redial_on_startup = 0; /* iff non-zero execute redial_cmd on startup */
|
||||
int speed = DEFAULT_BAUD;
|
||||
int slflags = 0; /* compression flags */
|
||||
int unit = -1; /* slip device unit number */
|
||||
int foreground = 0;
|
||||
int exiting = 0; /* allready running exit_handler */
|
||||
FILE *console;
|
||||
|
||||
struct termios tty;
|
||||
struct termios tty_orig; /* For saving original tty state */
|
||||
|
||||
char devname[32];
|
||||
char hostname[MAXHOSTNAMELEN];
|
||||
char *redial_cmd = 0; /* command to exec upon shutdown. */
|
||||
char *config_cmd = 0; /* command to exec if slip unit changes. */
|
||||
char *exit_cmd = 0; /* command to exec before exiting. */
|
||||
char string[100];
|
||||
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
static char usage_str[] = "\
|
||||
usage: %s [-acfhlnz] [-e command] [-r command] [-s speed] [-u command] device\n\
|
||||
-a -- autoenable VJ compression\n\
|
||||
-c -- enable VJ compression\n\
|
||||
-e ECMD -- run ECMD before exiting\n\
|
||||
-f -- run in foreground (don't detach from controlling tty)\n\
|
||||
-h -- turn on cts/rts style flow control\n\
|
||||
-l -- disable modem control (CLOCAL) and ignore carrier detect\n\
|
||||
-n -- throw out ICMP packets\n\
|
||||
-r RCMD -- run RCMD upon loss of carrier\n\
|
||||
-s # -- set baud rate (default 9600)\n\
|
||||
-u UCMD -- run 'UCMD <old sl#> <new sl#>' before switch to slip discipline\n\
|
||||
-z -- run RCMD upon startup irrespective of carrier\n";
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
register int fd;
|
||||
register char *dev = argv[1];
|
||||
struct sgttyb sgtty;
|
||||
int speed;
|
||||
int option;
|
||||
char name[32];
|
||||
extern char *optarg;
|
||||
extern int optind;
|
||||
|
||||
if (argc < 2 || argc > 3) {
|
||||
fprintf(stderr, "usage: %s ttyname [baudrate]\n", argv[0]);
|
||||
exit(1);
|
||||
while ((option = getopt(argc, argv, "ace:fhlnr:s:u:z")) != EOF) {
|
||||
switch (option) {
|
||||
case 'a':
|
||||
slflags |= SC_AUTOCOMP;
|
||||
slflags &= ~SC_COMPRESS;
|
||||
break;
|
||||
case 'c':
|
||||
slflags |= SC_COMPRESS;
|
||||
slflags &= ~SC_AUTOCOMP;
|
||||
break;
|
||||
case 'e':
|
||||
exit_cmd = (char*) strdup (optarg);
|
||||
break;
|
||||
case 'f':
|
||||
foreground = 1;
|
||||
break;
|
||||
case 'h':
|
||||
flow_control |= CRTSCTS;
|
||||
break;
|
||||
case 'l':
|
||||
modem_control |= CLOCAL;
|
||||
break;
|
||||
case 'n':
|
||||
slflags |= SC_NOICMP;
|
||||
break;
|
||||
case 'r':
|
||||
redial_cmd = (char*) strdup (optarg);
|
||||
break;
|
||||
case 's':
|
||||
speed = atoi(optarg);
|
||||
break;
|
||||
case 'u':
|
||||
config_cmd = (char*) strdup (optarg);
|
||||
break;
|
||||
case 'z':
|
||||
redial_on_startup = 1;
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "%s: Invalid option -- '%c'\n",
|
||||
option);
|
||||
case '?':
|
||||
fprintf(stderr, usage_str, argv[0]);
|
||||
exit_handler(1);
|
||||
}
|
||||
}
|
||||
speed = argc == 3 ? findspeed(atoi(argv[2])) : findspeed(DEFAULT_BAUD);
|
||||
if (speed == 0) {
|
||||
fprintf(stderr, "unknown speed %s", argv[2]);
|
||||
exit(1);
|
||||
|
||||
if (optind == argc - 1)
|
||||
dev = argv[optind];
|
||||
|
||||
if (optind < (argc - 1)) {
|
||||
fprintf(stderr, "%s: Too many args, first='%s'\n",
|
||||
argv[0], argv[optind]);
|
||||
}
|
||||
if (optind > (argc - 1)) {
|
||||
fprintf(stderr, "%s: Not enough args\n", argv[0]);
|
||||
}
|
||||
if (dev == (char *)0) {
|
||||
fprintf(stderr, usage_str, argv[0]);
|
||||
exit_handler(2);
|
||||
}
|
||||
if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
|
||||
(void)snprintf(devname, sizeof(devname),
|
||||
"%s%s", _PATH_DEV, dev);
|
||||
strcpy(devname, _PATH_DEV);
|
||||
strcat(devname, "/");
|
||||
strncat(devname, dev, 10);
|
||||
dev = devname;
|
||||
}
|
||||
if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) {
|
||||
perror(dev);
|
||||
exit(1);
|
||||
}
|
||||
sgtty.sg_flags = RAW | ANYP;
|
||||
sgtty.sg_ispeed = sgtty.sg_ospeed = speed;
|
||||
if (ioctl(fd, TIOCSETP, &sgtty) < 0) {
|
||||
perror("ioctl(TIOCSETP)");
|
||||
exit(1);
|
||||
}
|
||||
if (ioctl(fd, TIOCSETD, &slipdisc) < 0) {
|
||||
perror("ioctl(TIOCSETD)");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (fork() > 0)
|
||||
exit(0);
|
||||
for (;;)
|
||||
sigpause(0L);
|
||||
if (!foreground)
|
||||
daemon(0,0); /* fork, setsid, chdir /, and close std*. */
|
||||
|
||||
/* Note: daemon() closes stderr, so log errors from here on. */
|
||||
(void)sprintf(name,"slattach[%d]", getpid());
|
||||
openlog(name,LOG_CONS,LOG_DAEMON);
|
||||
|
||||
if ((fd = open(dev, O_RDWR | O_NONBLOCK)) < 0) {
|
||||
syslog(LOG_ERR, "open(%s): %m", dev);
|
||||
exit_handler(1);
|
||||
}
|
||||
/* acquire the serial line as a controling terminal. */
|
||||
if (ioctl(fd, TIOCSCTTY, 0) < 0)
|
||||
syslog(LOG_NOTICE,"ioctl(TIOCSCTTY) failed: %s: %m");
|
||||
/* Make us the foreground process group associated with the
|
||||
slip line which is our controlling terminal. */
|
||||
if (tcsetpgrp(fd, getpid()) < 0)
|
||||
syslog(LOG_NOTICE,"tcsetpgrp failed: %s: %m");
|
||||
/* upon INT log a timestamp and exit. */
|
||||
if ((int)signal(SIGINT,sigint_handler) < 0)
|
||||
syslog(LOG_NOTICE,"cannot install SIGINT handler: %s: %m");
|
||||
/* upon TERM log a timestamp and exit. */
|
||||
if ((int)signal(SIGTERM,sigterm_handler) < 0)
|
||||
syslog(LOG_NOTICE,"cannot install SIGTERM handler: %s: %m");
|
||||
/* upon HUP redial and reconnect. */
|
||||
if ((int)signal(SIGHUP,sighup_handler) < 0)
|
||||
syslog(LOG_NOTICE,"cannot install SIGHUP handler: %s: %m");
|
||||
/* Keep track of our original terminal values for redialing */
|
||||
if (tcgetattr(fd, &tty_orig) < 0) {
|
||||
syslog(LOG_ERR, "tcgetattr: %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
|
||||
|
||||
setup_line();
|
||||
|
||||
if (redial_on_startup)
|
||||
sighup_handler();
|
||||
else
|
||||
attach_line();
|
||||
if (!(modem_control & CLOCAL)) {
|
||||
ioctl(fd, TIOCMGET, &comstate);
|
||||
if (!(comstate & TIOCM_CD)) { /* check for carrier */
|
||||
/* force a redial if no carrier */
|
||||
kill (getpid(), SIGHUP);
|
||||
}
|
||||
}
|
||||
for (;;) {
|
||||
sigset_t mask = 0;
|
||||
sigsuspend(&mask);
|
||||
}
|
||||
}
|
||||
|
||||
struct sg_spds {
|
||||
int sp_val, sp_name;
|
||||
} spds[] = {
|
||||
#ifdef B50
|
||||
{ 50, B50 },
|
||||
#endif
|
||||
#ifdef B75
|
||||
{ 75, B75 },
|
||||
#endif
|
||||
#ifdef B110
|
||||
{ 110, B110 },
|
||||
#endif
|
||||
#ifdef B150
|
||||
{ 150, B150 },
|
||||
#endif
|
||||
#ifdef B200
|
||||
{ 200, B200 },
|
||||
#endif
|
||||
#ifdef B300
|
||||
{ 300, B300 },
|
||||
#endif
|
||||
#ifdef B600
|
||||
{ 600, B600 },
|
||||
#endif
|
||||
#ifdef B1200
|
||||
{ 1200, B1200 },
|
||||
#endif
|
||||
#ifdef B1800
|
||||
{ 1800, B1800 },
|
||||
#endif
|
||||
#ifdef B2000
|
||||
{ 2000, B2000 },
|
||||
#endif
|
||||
#ifdef B2400
|
||||
{ 2400, B2400 },
|
||||
#endif
|
||||
#ifdef B3600
|
||||
{ 3600, B3600 },
|
||||
#endif
|
||||
#ifdef B4800
|
||||
{ 4800, B4800 },
|
||||
#endif
|
||||
#ifdef B7200
|
||||
{ 7200, B7200 },
|
||||
#endif
|
||||
#ifdef B9600
|
||||
{ 9600, B9600 },
|
||||
#endif
|
||||
#ifdef EXTA
|
||||
{ 19200, EXTA },
|
||||
#endif
|
||||
#ifdef EXTB
|
||||
{ 38400, EXTB },
|
||||
#endif
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
findspeed(speed)
|
||||
register int speed;
|
||||
void setup_line()
|
||||
{
|
||||
register struct sg_spds *sp;
|
||||
|
||||
sp = spds;
|
||||
while (sp->sp_val && sp->sp_val != speed)
|
||||
sp++;
|
||||
return (sp->sp_name);
|
||||
tty.c_lflag = tty.c_iflag = tty.c_oflag = 0;
|
||||
tty.c_cflag = CREAD | CS8 | flow_control | modem_control;
|
||||
tty.c_ispeed = tty.c_ospeed = speed;
|
||||
/* set the line speed and flow control */
|
||||
if (tcsetattr(fd, TCSAFLUSH, &tty) < 0) {
|
||||
syslog(LOG_ERR, "tcsetattr(TCSAFLUSH): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
/* set data terminal ready */
|
||||
if (ioctl(fd, TIOCSDTR) < 0) {
|
||||
syslog(LOG_ERR, "ioctl(TIOCSDTR): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
/* Switch to slip line discipline. */
|
||||
if (ioctl(fd, TIOCSETD, &slipdisc) < 0) {
|
||||
syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
/* Assert any compression or no-icmp flags. */
|
||||
if (ioctl(fd, SLIOCSFLAGS, &slflags) < 0) {
|
||||
syslog(LOG_ERR, "ioctl(SLIOCSFLAGS): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
}
|
||||
|
||||
/* switch to slip line discipline and configure the network. */
|
||||
void attach_line()
|
||||
{
|
||||
int new_unit;
|
||||
|
||||
/* find out what unit number we were assigned */
|
||||
if (ioctl(fd, SLIOCGUNIT, (caddr_t)&new_unit) < 0) {
|
||||
syslog(LOG_ERR, "ioctl(SLIOCGUNIT): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
/* don't compare unit numbers if this is the first time to attach. */
|
||||
if (unit < 0)
|
||||
unit = new_unit;
|
||||
/* iff the unit number changes either invoke config_cmd or punt. */
|
||||
if (config_cmd) {
|
||||
char *s;
|
||||
s = (char*) malloc(strlen(config_cmd) + 32);
|
||||
sprintf (s, "%s %d %d", config_cmd, unit, new_unit);
|
||||
syslog(LOG_NOTICE, "Configuring %s (sl%d):", dev, unit);
|
||||
syslog(LOG_NOTICE, " '%s'", s);
|
||||
system(s);
|
||||
free (s);
|
||||
unit = new_unit;
|
||||
} else {
|
||||
if (new_unit != unit) {
|
||||
syslog(LOG_ERR, "slip unit changed from sl%d to sl%d, but no -u CMD was specified!");
|
||||
exit_handler(1);
|
||||
}
|
||||
syslog(LOG_NOTICE,"sl%d connected to %s at %d baud",unit,dev,speed);
|
||||
}
|
||||
}
|
||||
|
||||
/* Signal handler for SIGHUP when carrier is dropped. */
|
||||
void sighup_handler()
|
||||
{
|
||||
if(exiting) return;
|
||||
again:
|
||||
/* reset discipline */
|
||||
if (ioctl(fd, TIOCSETD, &ttydisc) < 0) {
|
||||
syslog(LOG_ERR, "ioctl(TIOCSETD): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
/* invoke a shell for redial_cmd or punt. */
|
||||
if (redial_cmd) {
|
||||
syslog(LOG_NOTICE,"SIGHUP on %s (sl%d); running %s",
|
||||
dev,unit,redial_cmd);
|
||||
if (!(modem_control & CLOCAL)) {
|
||||
tty_orig.c_cflag |= CLOCAL;
|
||||
if (tcsetattr(fd, TCSAFLUSH, &tty_orig) < 0) {
|
||||
syslog(LOG_ERR, "tcsetattr(TCSAFLUSH): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
}
|
||||
system(redial_cmd);
|
||||
/* Now check again for carrier (dial command is done): */
|
||||
if (!(modem_control & CLOCAL)) {
|
||||
tty.c_cflag &= ~CLOCAL;
|
||||
if (tcsetattr(fd, TCSAFLUSH, &tty) < 0) {
|
||||
syslog(LOG_ERR, "tcsetattr(TCSAFLUSH): %m");
|
||||
exit_handler(1);
|
||||
}
|
||||
ioctl(fd, TIOCMGET, &comstate);
|
||||
if (!(comstate & TIOCM_CD)) { /* check for carrier */
|
||||
/* force a redial if no carrier */
|
||||
goto again;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
* No redial command.
|
||||
*
|
||||
* If modem control, just wait for carrier before
|
||||
* falling through to setup_line() and attach_line().
|
||||
* If no modem control, just fall through immediately.
|
||||
*/
|
||||
if (!(modem_control & CLOCAL)) {
|
||||
int carrier = 0;
|
||||
|
||||
syslog(LOG_NOTICE, "Waiting for carrier on %s (sl%d)",
|
||||
dev, unit);
|
||||
|
||||
/* Now wait for carrier before attaching line: */
|
||||
while (! carrier) {
|
||||
/*
|
||||
* Don't burn the CPU checking for carrier;
|
||||
* carrier must be polled since there is no
|
||||
* way to have a signal sent when carrier
|
||||
* goes high (SIGHUP can only be sent when
|
||||
* carrier is dropped); so add space between
|
||||
* checks for carrier:
|
||||
*/
|
||||
sleep(2);
|
||||
|
||||
/* Check for carrier present on tty port: */
|
||||
ioctl(fd, TIOCMGET, &comstate);
|
||||
if (comstate & TIOCM_CD) {
|
||||
carrier = 1;
|
||||
}
|
||||
}
|
||||
|
||||
syslog(LOG_NOTICE, "Carrier now present on %s (sl%d)",
|
||||
dev, unit);
|
||||
}
|
||||
}
|
||||
setup_line();
|
||||
attach_line();
|
||||
}
|
||||
/* Signal handler for SIGINT. We just log and exit. */
|
||||
void sigint_handler()
|
||||
{
|
||||
if(exiting) return;
|
||||
syslog(LOG_NOTICE,"sl%d on %s caught SIGINT, exiting.",unit,dev);
|
||||
exit_handler(0);
|
||||
}
|
||||
/* Signal handler for SIGTERM. We just log and exit. */
|
||||
void sigterm_handler()
|
||||
{
|
||||
if(exiting) return;
|
||||
syslog(LOG_NOTICE,"SIGTERM on %s (sl%d); exiting",dev,unit);
|
||||
exit_handler(0);
|
||||
}
|
||||
/* Run config_cmd if specified before exiting. */
|
||||
void exit_handler(int ret)
|
||||
{
|
||||
if(exiting) return;
|
||||
exiting = 1;
|
||||
/*
|
||||
* First close the slip line in case exit_cmd wants it (like to hang
|
||||
* up a modem or something).
|
||||
*/
|
||||
if (fd != -1)
|
||||
close(fd);
|
||||
/* invoke a shell for exit_cmd. */
|
||||
if (exit_cmd) {
|
||||
syslog(LOG_NOTICE,"exiting after running %s", exit_cmd);
|
||||
system(exit_cmd);
|
||||
}
|
||||
exit(ret);
|
||||
}
|
||||
|
||||
/* local variables: */
|
||||
/* c-indent-level: 8 */
|
||||
/* c-argdecl-indent: 0 */
|
||||
/* c-label-offset: -8 */
|
||||
/* c-continued-statement-offset: 8 */
|
||||
/* c-brace-offset: 0 */
|
||||
/* comment-column: 32 */
|
||||
/* end: */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user