freebsd-dev/usr.sbin/ppp/tty.c
Brian Somers f5a99677a3 Correct the way ppp transfers links on the server side in MP
mode by padding out the ``struct device'' to the maximum
device size.
Bump the ppp version number to indicate the transfer format
change.

This should make MP over tty and udp devices functional again.
1999-06-05 21:36:00 +00:00

460 lines
12 KiB
C

/*-
* Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id: tty.c,v 1.8 1999/05/27 08:42:49 brian Exp $
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <sys/un.h>
#if defined(__OpenBSD__) || defined(__NetBSD__)
#include <sys/ioctl.h>
#include <util.h>
#else
#include <libutil.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <termios.h>
#include <unistd.h>
#include "layer.h"
#include "defs.h"
#include "mbuf.h"
#include "log.h"
#include "id.h"
#include "sync.h"
#include "timer.h"
#include "lqr.h"
#include "hdlc.h"
#include "throughput.h"
#include "fsm.h"
#include "lcp.h"
#include "ccp.h"
#include "link.h"
#include "async.h"
#include "slcompress.h"
#include "iplist.h"
#include "ipcp.h"
#include "filter.h"
#include "descriptor.h"
#include "physical.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "chat.h"
#include "command.h"
#include "bundle.h"
#include "prompt.h"
#include "auth.h"
#include "chap.h"
#include "cbcp.h"
#include "datalink.h"
#include "main.h"
#include "tty.h"
#define Online(dev) ((dev)->mbits & TIOCM_CD)
struct ttydevice {
struct device dev; /* What struct physical knows about */
struct pppTimer Timer; /* CD checks */
int mbits; /* Current DCD status */
struct termios ios; /* To be able to reset from raw mode */
};
#define device2tty(d) ((d)->type == TTY_DEVICE ? (struct ttydevice *)d : NULL)
int
tty_DeviceSize(void)
{
return sizeof(struct ttydevice);
}
/*
* tty_Timeout() watches the DCD signal and mentions it if it's status
* changes.
*/
static void
tty_Timeout(void *data)
{
struct physical *p = data;
struct ttydevice *dev = device2tty(p->handler);
int ombits, change;
timer_Stop(&dev->Timer);
dev->Timer.load = SECTICKS; /* Once a second please */
timer_Start(&dev->Timer);
ombits = dev->mbits;
if (p->fd >= 0) {
if (ioctl(p->fd, TIOCMGET, &dev->mbits) < 0) {
log_Printf(LogPHASE, "%s: ioctl error (%s)!\n", p->link.name,
strerror(errno));
datalink_Down(p->dl, CLOSE_NORMAL);
timer_Stop(&dev->Timer);
return;
}
} else
dev->mbits = 0;
if (ombits == -1) {
/* First time looking for carrier */
if (Online(dev))
log_Printf(LogDEBUG, "%s: %s: CD detected\n", p->link.name, p->name.full);
else if (p->cfg.cd.required) {
log_Printf(LogPHASE, "%s: %s: Required CD not detected\n",
p->link.name, p->name.full);
datalink_Down(p->dl, CLOSE_NORMAL);
} else {
log_Printf(LogPHASE, "%s: %s doesn't support CD\n",
p->link.name, p->name.full);
timer_Stop(&dev->Timer);
dev->mbits = TIOCM_CD;
}
} else {
change = ombits ^ dev->mbits;
if (change & TIOCM_CD) {
if (dev->mbits & TIOCM_CD)
log_Printf(LogDEBUG, "%s: offline -> online\n", p->link.name);
else {
log_Printf(LogDEBUG, "%s: online -> offline\n", p->link.name);
log_Printf(LogPHASE, "%s: Carrier lost\n", p->link.name);
datalink_Down(p->dl, CLOSE_NORMAL);
timer_Stop(&dev->Timer);
}
} else
log_Printf(LogDEBUG, "%s: Still %sline\n", p->link.name,
Online(dev) ? "on" : "off");
}
}
static void
tty_StartTimer(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
timer_Stop(&dev->Timer);
dev->Timer.load = SECTICKS * p->cfg.cd.delay;
dev->Timer.func = tty_Timeout;
dev->Timer.name = "tty CD";
dev->Timer.arg = p;
log_Printf(LogDEBUG, "%s: Using tty_Timeout [%p]\n",
p->link.name, tty_Timeout);
dev->mbits = -1; /* So we know it's the first time */
timer_Start(&dev->Timer);
}
static int
tty_Raw(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
struct termios ios;
int oldflag;
if (physical_IsSync(p))
return 1;
log_Printf(LogDEBUG, "%s: Entering physical_Raw\n", p->link.name);
if (p->type != PHYS_DIRECT && p->fd >= 0 && !Online(dev))
log_Printf(LogDEBUG, "%s: Raw: descriptor = %d, mbits = %x\n",
p->link.name, p->fd, dev->mbits);
tcgetattr(p->fd, &ios);
cfmakeraw(&ios);
if (p->cfg.rts_cts)
ios.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
else
ios.c_cflag |= CLOCAL;
if (p->type != PHYS_DEDICATED)
ios.c_cflag |= HUPCL;
tcsetattr(p->fd, TCSANOW, &ios);
oldflag = fcntl(p->fd, F_GETFL, 0);
if (oldflag < 0)
return 0;
fcntl(p->fd, F_SETFL, oldflag | O_NONBLOCK);
if (ioctl(p->fd, TIOCMGET, &dev->mbits) == 0)
tty_StartTimer(p);
return 1;
}
static void
tty_Offline(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
if (p->fd >= 0) {
timer_Stop(&dev->Timer);
dev->mbits &= ~TIOCM_DTR;
if (Online(dev)) {
struct termios tio;
tcgetattr(p->fd, &tio);
if (cfsetspeed(&tio, B0) == -1)
log_Printf(LogWARN, "%s: Unable to set physical to speed 0\n",
p->link.name);
else
tcsetattr(p->fd, TCSANOW, &tio);
}
}
}
static void
tty_Cooked(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
int oldflag;
tty_Offline(p); /* In case of emergency close()s */
tcflush(p->fd, TCIOFLUSH);
if (!physical_IsSync(p)) {
tcsetattr(p->fd, TCSAFLUSH, &dev->ios);
oldflag = fcntl(p->fd, F_GETFL, 0);
if (oldflag == 0)
fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
}
}
static void
tty_StopTimer(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
timer_Stop(&dev->Timer);
}
static void
tty_Free(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
tty_Offline(p); /* In case of emergency close()s */
free(dev);
}
static int
tty_Speed(struct physical *p)
{
struct termios ios;
if (tcgetattr(p->fd, &ios) == -1)
return 0;
return SpeedToInt(cfgetispeed(&ios));
}
static const char *
tty_OpenInfo(struct physical *p)
{
struct ttydevice *dev = device2tty(p->handler);
static char buf[13];
if (Online(dev))
strcpy(buf, "with");
else
strcpy(buf, "no");
strcat(buf, " carrier");
return buf;
}
static void
tty_device2iov(struct device *d, struct iovec *iov, int *niov,
int maxiov, pid_t newpid)
{
struct ttydevice *dev = device2tty(d);
int sz = physical_MaxDeviceSize();
iov[*niov].iov_base = realloc(d, sz);
if (iov[*niov].iov_base == NULL) {
log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
AbortProgram(EX_OSERR);
}
iov[*niov].iov_len = sz;
(*niov)++;
if (dev->Timer.state != TIMER_STOPPED) {
timer_Stop(&dev->Timer);
dev->Timer.state = TIMER_RUNNING;
}
}
static struct device basettydevice = {
TTY_DEVICE,
"tty",
tty_Raw,
tty_Offline,
tty_Cooked,
tty_StopTimer,
tty_Free,
NULL,
NULL,
tty_device2iov,
tty_Speed,
tty_OpenInfo
};
struct device *
tty_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
int maxiov)
{
if (type == TTY_DEVICE) {
struct ttydevice *dev = (struct ttydevice *)iov[(*niov)++].iov_base;
dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
if (dev == NULL) {
log_Printf(LogALERT, "Failed to allocate memory: %d\n",
(int)(sizeof *dev));
AbortProgram(EX_OSERR);
}
/* Refresh function pointers etc */
memcpy(&dev->dev, &basettydevice, sizeof dev->dev);
physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
if (dev->Timer.state != TIMER_STOPPED) {
dev->Timer.state = TIMER_STOPPED;
p->handler = &dev->dev; /* For the benefit of StartTimer */
tty_StartTimer(p);
}
return &dev->dev;
}
return NULL;
}
struct device *
tty_Create(struct physical *p)
{
struct ttydevice *dev;
struct termios ios;
int oldflag;
if (p->fd < 0 || !isatty(p->fd))
/* Don't want this */
return NULL;
if (*p->name.full == '\0') {
physical_SetDevice(p, ttyname(p->fd));
log_Printf(LogDEBUG, "%s: Input is a tty (%s)\n",
p->link.name, p->name.full);
} else
log_Printf(LogDEBUG, "%s: Opened %s\n", p->link.name, p->name.full);
/* We're gonna return a ttydevice (unless something goes horribly wrong) */
if ((dev = malloc(sizeof *dev)) == NULL) {
/* Complete failure - parent doesn't continue trying to ``create'' */
close(p->fd);
p->fd = -1;
return NULL;
}
memcpy(&dev->dev, &basettydevice, sizeof dev->dev);
memset(&dev->Timer, '\0', sizeof dev->Timer);
tcgetattr(p->fd, &ios);
dev->ios = ios;
log_Printf(LogDEBUG, "%s: tty_Create: physical (get): fd = %d,"
" iflag = %lx, oflag = %lx, cflag = %lx\n", p->link.name, p->fd,
(u_long)ios.c_iflag, (u_long)ios.c_oflag, (u_long)ios.c_cflag);
cfmakeraw(&ios);
if (p->cfg.rts_cts)
ios.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
else {
ios.c_cflag |= CLOCAL;
ios.c_iflag |= IXOFF;
}
ios.c_iflag |= IXON;
if (p->type != PHYS_DEDICATED)
ios.c_cflag |= HUPCL;
if (p->type != PHYS_DIRECT) {
/* Change tty speed when we're not in -direct mode */
ios.c_cflag &= ~(CSIZE | PARODD | PARENB);
ios.c_cflag |= p->cfg.parity;
if (cfsetspeed(&ios, IntToSpeed(p->cfg.speed)) == -1)
log_Printf(LogWARN, "%s: %s: Unable to set speed to %d\n",
p->link.name, p->name.full, p->cfg.speed);
}
tcsetattr(p->fd, TCSADRAIN, &ios);
log_Printf(LogDEBUG, "%s: physical (put): iflag = %lx, oflag = %lx, "
"cflag = %lx\n", p->link.name, (u_long)ios.c_iflag,
(u_long)ios.c_oflag, (u_long)ios.c_cflag);
if (ioctl(p->fd, TIOCMGET, &dev->mbits) == -1) {
if (p->type != PHYS_DIRECT) {
/* Complete failure - parent doesn't continue trying to ``create'' */
log_Printf(LogWARN, "%s: Open: Cannot get physical status: %s\n",
p->link.name, strerror(errno));
tty_Cooked(p);
close(p->fd);
p->fd = -1;
return NULL;
} else
dev->mbits = TIOCM_CD;
}
log_Printf(LogDEBUG, "%s: Open: physical control = %o\n",
p->link.name, dev->mbits);
oldflag = fcntl(p->fd, F_GETFL, 0);
if (oldflag < 0) {
/* Complete failure - parent doesn't continue trying to ``create'' */
log_Printf(LogWARN, "%s: Open: Cannot get physical flags: %s\n",
p->link.name, strerror(errno));
tty_Cooked(p);
close(p->fd);
p->fd = -1;
return NULL;
} else
fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
return &dev->dev;
}