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From: nerd@percival.rain.com (Michael Galassi)
Newsgroups: comp.unix.bsd
Subject: [386bsd] slattach.c w/ support for vj compression
Keywords: slattach
Message-ID: <BupIK1.9Go@percy.rain.com>
Date: 17 Sep 92 05:14:23 GMT
Article-I.D.: percy.BupIK1.9Go
Sender: news@percy.rain.com (News maintainer)
Organization: Percy's mach, Portland, OR
Lines: 243
Nntp-Posting-Host: percival.rain.com
Here is a modified version of slattach, it takes command line options
in the getopt style to manipulate the flags for an interface. I did
not update the man page so the source is your only documentation, if
you don't like this I don't care.
There is probably a .signature at the end of this posting.
--- 8< --- cut here --- 8< ---
/*
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Adams.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
/*
** Hacks to support "-a|c|n" flags on the command line which enalbe VJ
** header compresion and disable ICMP. I use getopt to deal witht that
** stuff because I'm a lazy sob, I can't spell, and that's OK.
**
** If this is good all rights go to B & L Joliz, otherwise send your
** comments to Reagan (/dev/null).
**
** nerd@percival.rain.com (Michael Galassi) 92.09.03
*/
#ifndef lint
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 4.6 (Berkeley(nerd)) 6/1/90(92.09.03)";
#endif /* not lint */
#include <sys/param.h>
#include <sgtty.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 <stdio.h>
#include <paths.h>
#define DEFAULT_BAUD 9600
static char usage_str[] = "\
usage: %s [-a ][-c ][-n ][-s <speed> ]<device>\n\
-a -- autoenable VJ compression\n\
-c -- enable VJ compression\n\
-n -- throw out ICMP packets\n\
-s -- baud rate (default 9600)\n";
int main(int argc, char **argv)
{
struct sgttyb sgtty;
int option;
int fd;
char devname[32];
char *dev = (char *)0;
int slipdisc = SLIPDISC;
int speed = DEFAULT_BAUD;
int slflags = 0;
extern char *optarg;
extern int optind;
while ((option = getopt(argc, argv, "acns:")) != EOF) {
switch (option) {
case 'a':
slflags |= SC_AUTOCOMP;
slflags &= ~SC_COMPRESS;
break;
case 'c':
slflags |= SC_COMPRESS;
slflags &= ~SC_AUTOCOMP;
break;
case 'n':
slflags |= SC_NOICMP;
break;
case 's':
speed = atoi(optarg);
break;
case '?':
default:
fprintf(stderr, usage_str, argv[0]);
exit(1);
}
}
if (optind == argc - 1)
dev = argv[optind];
if (dev == (char *)0) {
fprintf(stderr, usage_str, argv[0]);
exit(2);
}
if ((speed = findspeed(speed)) == 0) {
fprintf(stderr, "unknown speed");
exit(1);
}
if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
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)");
close(fd);
exit(1);
}
if (ioctl(fd, TIOCSETD, &slipdisc) < 0) {
perror("ioctl(TIOCSETD)");
close(fd);
exit(1);
}
if (ioctl(fd, SLIOCSFLAGS, &slflags) < 0) {
perror("ioctl(SLIOCSFLAGS)");
close(fd);
exit(1);
}
if (fork() > 0)
exit(0);
for (;;)
sigpause(0L);
}
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 }
};
int findspeed(int speed)
{
struct sg_spds *sp = spds;
while ((sp->sp_val != 0) && (sp->sp_val != speed))
sp++;
return (sp->sp_name);
}
--
Michael Galassi -- nerd@percival.rain.com