Date: Fri, 12 Jul 1996 09:54:39 +1000 From: Bruce Evans <bde@zeta.org.au> To: freebsd-hardware@FreeBSD.ORG, freebsd-isp@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG, stefan@islandia.is Subject: Re: Problems with PPP and cyclades (fwd) Message-ID: <199607112354.JAA20628@godzilla.zeta.org.au>
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>I'm trying to get ppp-iij using the tun device to work. I can connect to it
>and everything seems fine until I hangup, the ppp daemon doesn't terminate
>and just holds the device open. This happens only when using Cyclades 16-Ye
>DB25-DB25 device with 16 modems connected (from dmesg: cy0 irq 5 maddr
>0xd4000 msize 8192 on isa). But when using sio everything
>works fine and ppp terminates. I'm using the same modem on both devices.
>...
>Currently I'm using sliplogin.dynamic with the Cy-16 with the external
>connector box, and there are no trouble with that setup. But some of my
>users want to use ppp to connect to my server.
ppp polls DCD while slattach waits for a SIGHUP. ppp's method is much
easier to get right for both the daemon and the driver, but there seems
to be a problem with it.
I use the following program to poll the modem state for all sio and cy
lines. The DCD state should be `-DCD' when nothing is connected and
change to '+DCD' when something is connected and raises DCD and change
to `-DCD' on hangup. This works with a Cyclaydes 8Yo. Perhaps there
is a timing problem in the ppp daemon. You should probably use kernel
ppp if there is more that one ppp session at a time.
---
comstate.c
---
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
static void try(char *prefix);
int main()
{
try("ttyd");
try("cuaa");
try("ttyc");
try("cuac");
return 0;
}
static void try(char *prefix)
{
int bit;
char dev_name[32];
int dev_nr;
int fd;
int comstate;
int stat;
static char *statenames[] = {
"LE",
"DTR",
"RTS",
"ST",
"SR",
"CTS",
"DCD",
"RI",
"DSR",
};
for (dev_nr = 0; dev_nr < 32; ++dev_nr) {
sprintf(dev_name, "/dev/%s%c", prefix,
dev_nr < 10 ? '0' + dev_nr : 'a' + (dev_nr - 10));
fd = open(dev_name, O_RDWR | O_NONBLOCK);
if (fd >= 0) {
comstate = 0xdeadbeef;
stat = ioctl(fd, TIOCMGET, &comstate);
printf("%s: ioctl returned %d:", dev_name, stat);
for (bit = 0; bit < 9; ++bit)
printf(" %c%s",
comstate & (1 << bit) ? '+' : '-',
statenames[bit]);
printf("\n");
close(fd);
}
}
}
>stty -f /dev/ttyd0
>speed 9600 baud;
>lflags: -icanon -isig -iexten -echo
>iflags: -icrnl -ixon -ixany -imaxbel -brkint
>oflags: -opost -onlcr -oxtabs
>cflags: cs8 -parenb
> ^^^^^^ No crtscts ? Is that normal ?
It is the default.
Bruce
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