FreeBSD-5.3/usr.sbin/ppp/i4b.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.
*
* $FreeBSD: src/usr.sbin/ppp/i4b.c,v 1.14 2002/05/14 12:55:38 brian Exp $
*/
#include <sys/param.h>
#include <sys/un.h>
#if defined(__OpenBSD__) || defined(__NetBSD__)
#include <sys/ioctl.h>
#endif
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#ifdef __FreeBSD__
#include <machine/i4b_ioctl.h>
#include <machine/i4b_rbch_ioctl.h>
#else
#ifdef __NetBSD__
#include <netisdn/i4b_ioctl.h>
#include <netisdn/i4b_rbch_ioctl.h>
#else
#include <i4b/i4b_ioctl.h>
#include <i4b/i4b_rbch_ioctl.h>
#endif
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/uio.h>
#include <termios.h>
#include <unistd.h>
#include "layer.h"
#include "defs.h"
#include "mbuf.h"
#include "log.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 "descriptor.h"
#include "physical.h"
#include "mp.h"
#include "chat.h"
#include "auth.h"
#include "chap.h"
#include "cbcp.h"
#include "datalink.h"
#include "main.h"
#include "i4b.h"
#define Online(dev) ((dev)->mbits & TIOCM_CD)
struct i4bdevice {
struct device dev; /* What struct physical knows about */
struct pppTimer Timer; /* CD checks */
int mbits; /* Current DCD status */
int carrier_seconds; /* seconds before CD is *required* */
};
#define device2i4b(d) ((d)->type == I4B_DEVICE ? (struct i4bdevice *)d : NULL)
int
i4b_DeviceSize(void)
{
return sizeof(struct i4bdevice);
}
/*
* i4b_Timeout() watches the DCD signal and mentions it if it's status
* changes.
*/
static void
i4b_Timeout(void *data)
{
struct physical *p = data;
struct i4bdevice *dev = device2i4b(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(LogPHASE, "%s: %s: CD detected\n", p->link.name, p->name.full);
else if (++dev->carrier_seconds >= dev->dev.cd.delay) {
log_Printf(LogPHASE, "%s: %s: No carrier"
" (increase ``set cd'' from %d ?)\n",
p->link.name, p->name.full, dev->dev.cd.delay);
timer_Stop(&dev->Timer);
/* i4b_AwaitCarrier() will notice */
} else {
/* Keep waiting */
log_Printf(LogDEBUG, "%s: %s: Still no carrier (%d/%d)\n",
p->link.name, p->name.full, dev->carrier_seconds,
dev->dev.cd.delay);
dev->mbits = -1;
}
} 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
i4b_StartTimer(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
timer_Stop(&dev->Timer);
dev->Timer.load = SECTICKS;
dev->Timer.func = i4b_Timeout;
dev->Timer.name = "i4b CD";
dev->Timer.arg = p;
log_Printf(LogDEBUG, "%s: Using i4b_Timeout [%p]\n",
p->link.name, i4b_Timeout);
timer_Start(&dev->Timer);
}
static int
i4b_AwaitCarrier(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
if (dev->mbits == -1) {
if (dev->Timer.state == TIMER_STOPPED) {
dev->carrier_seconds = 0;
i4b_StartTimer(p);
}
return CARRIER_PENDING; /* Not yet ! */
}
return Online(dev) ? CARRIER_OK : CARRIER_LOST;
}
static int
i4b_Raw(struct physical *p)
{
int oldflag;
log_Printf(LogDEBUG, "%s: Entering i4b_Raw\n", p->link.name);
oldflag = fcntl(p->fd, F_GETFL, 0);
if (oldflag < 0)
return 0;
fcntl(p->fd, F_SETFL, oldflag | O_NONBLOCK);
return 1;
}
static void
i4b_Offline(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
if (p->fd >= 0) {
timer_Stop(&dev->Timer);
if (Online(dev)) {
int dummy;
dummy = 1;
ioctl(p->fd, TIOCCDTR, &dummy);
}
}
}
static void
i4b_Cooked(struct physical *p)
{
int oldflag;
i4b_Offline(p); /* In case of emergency close()s */
if ((oldflag = fcntl(p->fd, F_GETFL, 0)) != -1)
fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
}
static void
i4b_StopTimer(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
timer_Stop(&dev->Timer);
}
static void
i4b_Free(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
i4b_Offline(p); /* In case of emergency close()s */
free(dev);
}
static int
i4b_Speed(struct physical *p)
{
struct termios ios;
int ret;
if (tcgetattr(p->fd, &ios) == -1 ||
(ret = SpeedToInt(cfgetispeed(&ios))) == 0)
ret = 64000;
return ret;
}
static const char *
i4b_OpenInfo(struct physical *p)
{
struct i4bdevice *dev = device2i4b(p->handler);
static char buf[26];
if (Online(dev))
snprintf(buf, sizeof buf, "carrier took %ds", dev->carrier_seconds);
else
*buf = '\0';
return buf;
}
static int
i4b_Slot(struct physical *p)
{
struct stat st;
if (fstat(p->fd, &st) == 0)
return minor(st.st_rdev);
return -1;
}
static void
i4b_device2iov(struct device *d, struct iovec *iov, int *niov,
int maxiov, int *auxfd, int *nauxfd)
{
struct i4bdevice *dev = device2i4b(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 basei4bdevice = {
I4B_DEVICE,
"i4b",
0,
{ CD_REQUIRED, DEF_I4BCDDELAY },
i4b_AwaitCarrier,
NULL,
i4b_Raw,
i4b_Offline,
i4b_Cooked,
NULL,
i4b_StopTimer,
i4b_Free,
NULL,
NULL,
i4b_device2iov,
i4b_Speed,
i4b_OpenInfo,
i4b_Slot
};
struct device *
i4b_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
int maxiov, int *auxfd, int *nauxfd)
{
if (type == I4B_DEVICE) {
struct i4bdevice *dev = (struct i4bdevice *)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, &basei4bdevice, 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 */
i4b_StartTimer(p);
}
return &dev->dev;
}
return NULL;
}
struct device *
i4b_Create(struct physical *p)
{
struct i4bdevice *dev;
int oldflag, dial;
msg_vr_req_t req;
telno_t number;
if (p->fd < 0 || ioctl(p->fd, I4B_RBCH_VR_REQ, &req))
/* Don't want this */
return NULL;
/*
* We don't bother validating the version.... all versions of i4b that
* support I4B_RBCH_VR_REQ are fair game :-)
*/
if (*p->name.full == '\0') {
physical_SetDevice(p, ttyname(p->fd));
log_Printf(LogDEBUG, "%s: Input is an i4b version %d.%d.%d isdn "
"device (%s)\n", p->link.name, req.version, req.release,
req.step, p->name.full);
dial = 0;
} else {
log_Printf(LogDEBUG, "%s: Opened %s (i4b version %d.%d.%d)\n",
p->link.name, p->name.full, req.version, req.release, req.step);
dial = 1;
}
/* We're gonna return an i4bdevice (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, &basei4bdevice, sizeof dev->dev);
memset(&dev->Timer, '\0', sizeof dev->Timer);
dev->mbits = -1;
switch (p->cfg.cd.necessity) {
case CD_VARIABLE:
dev->dev.cd.delay = p->cfg.cd.delay;
break;
case CD_REQUIRED:
dev->dev.cd = p->cfg.cd;
break;
case CD_NOTREQUIRED:
log_Printf(LogWARN, "%s: Carrier must be set, using ``set cd %d!''\n",
p->link.name, dev->dev.cd.delay);
case CD_DEFAULT:
break;
}
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));
i4b_Cooked(p);
close(p->fd);
p->fd = -1;
free(dev);
return NULL;
} else
fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
if (dial) {
strncpy(number, datalink_ChoosePhoneNumber(p->dl), sizeof number - 1);
number[sizeof number - 1] = '\0';
if (number[0] == '\0')
dial = 0;
}
if (dial && ioctl(p->fd, I4B_RBCH_DIALOUT, number) == -1) {
/* Complete failure - parent doesn't continue trying to ``create'' */
log_Printf(LogWARN, "%s: ioctl(I4B_RBCH_DIALOUT): %s\n",
p->link.name, strerror(errno));
i4b_Cooked(p);
close(p->fd);
p->fd = -1;
free(dev);
return NULL;
}
physical_SetupStack(p, dev->dev.name, PHYSICAL_FORCE_SYNC);
return &dev->dev;
}