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freebsd-skq/usr.sbin/ppp/modem.c
brian e0d5cac898 Implement Reset{Req,Ack} properly, as per rfc 1962. 
(I completely mis-read the rfc last time 'round!)

This means:
  o Better CCP/WARN Reset diagnostics.
  o After we've sent a REQ and before we've received an ACK, we drop
    incoming compressed data and send another REQ.
  o Before sending an ACK, re-sequence all pending PRI_NORMAL data in
    the modem queue so that pending packets won't get to the peer
    *after* the ResetAck.
  o Send ACKs with the `identifier' from the REQ frame.
  o After we've received a correct ACK, duplicate ACKs are ok (and will
    reset our history).
  o Incorrect ACKs (not matching the last REQ) are moaned about and dropped.

Also,

  o Calculate the correct FCS after compressing a packet.  DEFLATE
    *may* produce an mbuf with more than a single link in the chain,
    but HdlcOutput didn't know how to calculate the FCS :-(
  o Make `struct fsm'::reqid a u_char, not an int.
    This fix will prevent us from sending id `255' 2,000,000,000 times
    before wrapping to `0' for another 2,000,000,000 sends :-/
  o Bump the version number a little.

The end result:  DEFLATE now works over an unreliable link layer.
                 I can txfr a 1.5Mb kernel over a (rather bad) null-modem
                 cable at an average of 21679 bytes per second using rcp.
Repeat after me: Don't test compression using a loopback ppp/tcp setup as
                 we never lose packets and therefore never have to reset!
1998-01-10 01:55:11 +00:00

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/*
* PPP Modem handling module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan, Inc. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: modem.c,v 1.73 1997/12/30 23:22:31 brian Exp $
*
* TODO:
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <utmp.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "id.h"
#include "timer.h"
#include "fsm.h"
#include "hdlc.h"
#include "lcp.h"
#include "ip.h"
#include "modem.h"
#include "loadalias.h"
#include "vars.h"
#include "main.h"
#include "chat.h"
#include "throughput.h"
#ifdef __OpenBSD__
#include <util.h>
#else
#include <libutil.h>
#endif
#ifndef O_NONBLOCK
#ifdef O_NDELAY
#define O_NONBLOCK O_NDELAY
#endif
#endif
static int mbits; /* Current DCD status */
static int connect_count;
static struct pppTimer ModemTimer;
#define Online (mbits & TIOCM_CD)
static struct mbuf *modemout;
static struct mqueue OutputQueues[PRI_LINK + 1];
static int dev_is_modem;
static struct pppThroughput throughput;
static void CloseLogicalModem(void);
void
Enqueue(struct mqueue * queue, struct mbuf * bp)
{
if (queue->last) {
queue->last->pnext = bp;
queue->last = bp;
} else
queue->last = queue->top = bp;
queue->qlen++;
LogPrintf(LogDEBUG, "Enqueue: len = %d\n", queue->qlen);
}
struct mbuf *
Dequeue(struct mqueue *queue)
{
struct mbuf *bp;
LogPrintf(LogDEBUG, "Dequeue: len = %d\n", queue->qlen);
bp = queue->top;
if (bp) {
queue->top = queue->top->pnext;
queue->qlen--;
if (queue->top == NULL) {
queue->last = queue->top;
if (queue->qlen)
LogPrintf(LogERROR, "Dequeue: Not zero (%d)!!!\n", queue->qlen);
}
}
return (bp);
}
void
SequenceQueues()
{
LogPrintf(LogDEBUG, "SequenceQueues\n");
while (OutputQueues[PRI_NORMAL].qlen)
Enqueue(OutputQueues + PRI_LINK, Dequeue(OutputQueues + PRI_NORMAL));
}
static struct speeds {
int nspeed;
speed_t speed;
} speeds[] = {
#ifdef B50
{ 50, B50, },
#endif
#ifdef B75
{ 75, B75, },
#endif
#ifdef B110
{ 110, B110, },
#endif
#ifdef B134
{ 134, B134, },
#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 B2400
{ 2400, B2400, },
#endif
#ifdef B4800
{ 4800, B4800, },
#endif
#ifdef B9600
{ 9600, B9600, },
#endif
#ifdef B19200
{ 19200, B19200, },
#endif
#ifdef B38400
{ 38400, B38400, },
#endif
#ifndef _POSIX_SOURCE
#ifdef B7200
{ 7200, B7200, },
#endif
#ifdef B14400
{ 14400, B14400, },
#endif
#ifdef B28800
{ 28800, B28800, },
#endif
#ifdef B57600
{ 57600, B57600, },
#endif
#ifdef B76800
{ 76800, B76800, },
#endif
#ifdef B115200
{ 115200, B115200, },
#endif
#ifdef B230400
{ 230400, B230400, },
#endif
#ifdef EXTA
{ 19200, EXTA, },
#endif
#ifdef EXTB
{ 38400, EXTB, },
#endif
#endif /* _POSIX_SOURCE */
{ 0, 0 }
};
static int
SpeedToInt(speed_t speed)
{
struct speeds *sp;
for (sp = speeds; sp->nspeed; sp++) {
if (sp->speed == speed) {
return (sp->nspeed);
}
}
return 0;
}
speed_t
IntToSpeed(int nspeed)
{
struct speeds *sp;
for (sp = speeds; sp->nspeed; sp++) {
if (sp->nspeed == nspeed) {
return (sp->speed);
}
}
return B0;
}
void
DownConnection()
{
LogPrintf(LogPHASE, "Disconnected!\n");
LcpDown();
}
/*
* ModemTimeout() watches DCD signal and notifies if it's status is changed.
*
*/
void
ModemTimeout(void *data)
{
int ombits = mbits;
int change;
StopTimer(&ModemTimer);
StartTimer(&ModemTimer);
if (dev_is_modem) {
if (modem >= 0) {
if (ioctl(modem, TIOCMGET, &mbits) < 0) {
LogPrintf(LogPHASE, "ioctl error (%s)!\n", strerror(errno));
DownConnection();
return;
}
} else
mbits = 0;
change = ombits ^ mbits;
if (change & TIOCM_CD) {
if (Online) {
LogPrintf(LogDEBUG, "ModemTimeout: offline -> online\n");
/*
* In dedicated mode, start packet mode immediate after we detected
* carrier.
*/
if (mode & MODE_DEDICATED)
PacketMode();
} else {
LogPrintf(LogDEBUG, "ModemTimeout: online -> offline\n");
reconnect(RECON_TRUE);
DownConnection();
}
}
else
LogPrintf(LogDEBUG, "ModemTimeout: Still %sline\n",
Online ? "on" : "off");
} else if (!Online) {
/* mbits was set to zero in OpenModem() */
mbits = TIOCM_CD;
}
}
static void
StartModemTimer(void)
{
StopTimer(&ModemTimer);
ModemTimer.state = TIMER_STOPPED;
ModemTimer.load = SECTICKS;
ModemTimer.func = ModemTimeout;
LogPrintf(LogDEBUG, "ModemTimer using ModemTimeout() - %p\n", ModemTimeout);
StartTimer(&ModemTimer);
}
struct parity {
const char *name;
const char *name1;
int set;
} validparity[] = {
{ "even", "P_EVEN", CS7 | PARENB },
{ "odd", "P_ODD", CS7 | PARENB | PARODD },
{ "none", "P_ZERO", CS8 },
{ NULL, 0 },
};
static int
GetParityValue(const char *str)
{
struct parity *pp;
for (pp = validparity; pp->name; pp++) {
if (strcasecmp(pp->name, str) == 0 ||
strcasecmp(pp->name1, str) == 0) {
return VarParity = pp->set;
}
}
return (-1);
}
int
ChangeParity(const char *str)
{
struct termios rstio;
int val;
val = GetParityValue(str);
if (val > 0) {
VarParity = val;
tcgetattr(modem, &rstio);
rstio.c_cflag &= ~(CSIZE | PARODD | PARENB);
rstio.c_cflag |= val;
tcsetattr(modem, TCSADRAIN, &rstio);
return 0;
}
LogPrintf(LogWARN, "ChangeParity: %s: Invalid parity\n", str);
return -1;
}
static int
OpenConnection(char *host, char *port)
{
struct sockaddr_in dest;
int sock;
struct hostent *hp;
struct servent *sp;
dest.sin_family = AF_INET;
dest.sin_addr.s_addr = inet_addr(host);
if (dest.sin_addr.s_addr == INADDR_NONE) {
hp = gethostbyname(host);
if (hp) {
memcpy(&dest.sin_addr.s_addr, hp->h_addr_list[0], 4);
} else {
LogPrintf(LogWARN, "OpenConnection: unknown host: %s\n", host);
return (-1);
}
}
dest.sin_port = htons(atoi(port));
if (dest.sin_port == 0) {
sp = getservbyname(port, "tcp");
if (sp) {
dest.sin_port = sp->s_port;
} else {
LogPrintf(LogWARN, "OpenConnection: unknown service: %s\n", port);
return (-1);
}
}
LogPrintf(LogPHASE, "Connecting to %s:%s\n", host, port);
sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock < 0) {
return (sock);
}
if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) {
LogPrintf(LogWARN, "OpenConnection: connection failed.\n");
return (-1);
}
LogPrintf(LogDEBUG, "OpenConnection: modem fd is %d.\n", sock);
return (sock);
}
static char fn[MAXPATHLEN];
static int
LockModem(void)
{
int res;
FILE *lockfile;
if (*VarDevice != '/')
return 0;
if (!(mode & MODE_DIRECT) && (res = ID0uu_lock(VarBaseDevice)) != UU_LOCK_OK) {
if (res == UU_LOCK_INUSE)
LogPrintf(LogPHASE, "Modem %s is in use\n", VarDevice);
else
LogPrintf(LogPHASE, "Modem %s is in use: uu_lock: %s\n",
VarDevice, uu_lockerr(res));
return (-1);
}
snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, VarBaseDevice);
lockfile = ID0fopen(fn, "w");
if (lockfile != NULL) {
fprintf(lockfile, "tun%d\n", tunno);
fclose(lockfile);
} else
LogPrintf(LogALERT, "Warning: Can't create %s: %s\n", fn, strerror(errno));
return 0;
}
static void
UnlockModem(void)
{
if (*VarDevice != '/')
return;
snprintf(fn, sizeof fn, "%s%s.if", _PATH_VARRUN, VarBaseDevice);
if (ID0unlink(fn) == -1)
LogPrintf(LogALERT, "Warning: Can't remove %s: %s\n", fn, strerror(errno));
if (!(mode & MODE_DIRECT) && ID0uu_unlock(VarBaseDevice) == -1)
LogPrintf(LogALERT, "Warning: Can't uu_unlock %s\n", fn);
}
static void
HaveModem(void)
{
throughput_start(&throughput);
connect_count++;
LogPrintf(LogPHASE, "Connected!\n");
}
static struct termios modemios;
int
OpenModem()
{
struct termios rstio;
int oldflag;
char *host, *port;
char *cp;
char tmpDeviceList[sizeof VarDeviceList];
char *tmpDevice;
if (modem >= 0)
LogPrintf(LogDEBUG, "OpenModem: Modem is already open!\n");
/* We're going back into "term" mode */
else if (mode & MODE_DIRECT) {
struct cmdargs arg;
arg.cmd = NULL;
arg.data = (const void *)VAR_DEVICE;
if (isatty(STDIN_FILENO)) {
LogPrintf(LogDEBUG, "OpenModem(direct): Modem is a tty\n");
cp = ttyname(STDIN_FILENO);
arg.argc = 1;
arg.argv = (char const *const *)&cp;
SetVariable(&arg);
if (LockModem() == -1) {
close(STDIN_FILENO);
return -1;
}
modem = STDIN_FILENO;
HaveModem();
} else {
LogPrintf(LogDEBUG, "OpenModem(direct): Modem is not a tty\n");
arg.argc = 0;
arg.argv = NULL;
SetVariable(&arg);
/* We don't call ModemTimeout() with this type of connection */
HaveModem();
return modem = STDIN_FILENO;
}
} else {
strncpy(tmpDeviceList, VarDeviceList, sizeof tmpDeviceList - 1);
tmpDeviceList[sizeof tmpDeviceList - 1] = '\0';
for(tmpDevice=strtok(tmpDeviceList, ","); tmpDevice && (modem < 0);
tmpDevice=strtok(NULL,",")) {
strncpy(VarDevice, tmpDevice, sizeof VarDevice - 1);
VarDevice[sizeof VarDevice - 1]= '\0';
VarBaseDevice = strrchr(VarDevice, '/');
VarBaseDevice = VarBaseDevice ? VarBaseDevice + 1 : "";
if (strncmp(VarDevice, "/dev/", 5) == 0) {
if (LockModem() == -1) {
modem = -1;
}
else {
modem = ID0open(VarDevice, O_RDWR | O_NONBLOCK);
if (modem < 0) {
LogPrintf(LogERROR, "OpenModem failed: %s: %s\n", VarDevice,
strerror(errno));
UnlockModem();
modem = -1;
}
else {
HaveModem();
LogPrintf(LogDEBUG, "OpenModem: Modem is %s\n", VarDevice);
}
}
} else {
/* PPP over TCP */
cp = strchr(VarDevice, ':');
if (cp) {
*cp = '\0';
host = VarDevice;
port = cp + 1;
if (*host && *port) {
modem = OpenConnection(host, port);
*cp = ':'; /* Don't destroy VarDevice */
if (modem < 0)
return (-1);
HaveModem();
LogPrintf(LogDEBUG, "OpenModem: Modem is socket %s\n", VarDevice);
} else {
*cp = ':'; /* Don't destroy VarDevice */
LogPrintf(LogERROR, "Invalid host:port: \"%s\"\n", VarDevice);
return (-1);
}
} else {
LogPrintf(LogERROR,
"Device (%s) must be in /dev or be a host:port pair\n",
VarDevice);
return (-1);
}
}
}
if (modem < 0) return modem;
}
/*
* If we are working on tty device, change it's mode into the one desired
* for further operation. In this implementation, we assume that modem is
* configuted to use CTS/RTS flow control.
*/
mbits = 0;
dev_is_modem = isatty(modem) || DEV_IS_SYNC;
if (DEV_IS_SYNC)
nointr_sleep(1);
if (dev_is_modem && !DEV_IS_SYNC) {
tcgetattr(modem, &rstio);
modemios = rstio;
LogPrintf(LogDEBUG, "OpenModem: modem = %d\n", modem);
LogPrintf(LogDEBUG, "OpenModem: modem (get): iflag = %x, oflag = %x,"
" cflag = %x\n", rstio.c_iflag, rstio.c_oflag, rstio.c_cflag);
cfmakeraw(&rstio);
if (VarCtsRts)
rstio.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
else {
rstio.c_cflag |= CLOCAL;
rstio.c_iflag |= IXOFF;
}
rstio.c_iflag |= IXON;
if (!(mode & MODE_DEDICATED))
rstio.c_cflag |= HUPCL;
if ((mode & MODE_DIRECT) == 0) {
/*
* If we are working as direct mode, don't change tty speed.
*/
rstio.c_cflag &= ~(CSIZE | PARODD | PARENB);
rstio.c_cflag |= VarParity;
if (cfsetspeed(&rstio, IntToSpeed(VarSpeed)) == -1) {
LogPrintf(LogWARN, "Unable to set modem speed (modem %d to %d)\n",
modem, VarSpeed);
}
}
tcsetattr(modem, TCSADRAIN, &rstio);
LogPrintf(LogDEBUG, "modem (put): iflag = %x, oflag = %x, cflag = %x\n",
rstio.c_iflag, rstio.c_oflag, rstio.c_cflag);
if (!(mode & MODE_DIRECT))
if (ioctl(modem, TIOCMGET, &mbits)) {
LogPrintf(LogERROR, "OpenModem: Cannot get modem status: %s\n",
strerror(errno));
CloseLogicalModem();
return (-1);
}
LogPrintf(LogDEBUG, "OpenModem: modem control = %o\n", mbits);
oldflag = fcntl(modem, F_GETFL, 0);
if (oldflag < 0) {
LogPrintf(LogERROR, "OpenModem: Cannot get modem flags: %s\n",
strerror(errno));
CloseLogicalModem();
return (-1);
}
(void) fcntl(modem, F_SETFL, oldflag & ~O_NONBLOCK);
}
StartModemTimer();
return (modem);
}
int
ModemSpeed()
{
struct termios rstio;
tcgetattr(modem, &rstio);
return (SpeedToInt(cfgetispeed(&rstio)));
}
/*
* Put modem tty line into raw mode which is necessary in packet mode operation
*/
int
RawModem()
{
struct termios rstio;
int oldflag;
if (!isatty(modem) || DEV_IS_SYNC)
return (0);
if (!(mode & MODE_DIRECT) && modem >= 0 && !Online) {
LogPrintf(LogDEBUG, "RawModem: mode = %d, modem = %d, mbits = %x\n", mode, modem, mbits);
}
tcgetattr(modem, &rstio);
cfmakeraw(&rstio);
if (VarCtsRts)
rstio.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
else
rstio.c_cflag |= CLOCAL;
if (!(mode & MODE_DEDICATED))
rstio.c_cflag |= HUPCL;
tcsetattr(modem, TCSADRAIN, &rstio);
oldflag = fcntl(modem, F_GETFL, 0);
if (oldflag < 0)
return (-1);
(void) fcntl(modem, F_SETFL, oldflag | O_NONBLOCK);
return (0);
}
static void
UnrawModem(void)
{
int oldflag;
if (isatty(modem) && !DEV_IS_SYNC) {
tcsetattr(modem, TCSAFLUSH, &modemios);
oldflag = fcntl(modem, F_GETFL, 0);
if (oldflag < 0)
return;
(void) fcntl(modem, F_SETFL, oldflag & ~O_NONBLOCK);
}
}
void
ModemAddInOctets(int n)
{
throughput_addin(&throughput, n);
}
void
ModemAddOutOctets(int n)
{
throughput_addout(&throughput, n);
}
static void
ClosePhysicalModem(void)
{
LogPrintf(LogDEBUG, "ClosePhysicalModem\n");
close(modem);
modem = -1;
throughput_log(&throughput, LogPHASE, "Modem");
}
void
HangupModem(int flag)
{
struct termios tio;
LogPrintf(LogDEBUG, "Hangup modem (%s)\n", modem >= 0 ? "open" : "closed");
if (modem < 0)
return;
StopTimer(&ModemTimer);
throughput_stop(&throughput);
if (TermMode) {
LogPrintf(LogDEBUG, "HangupModem: Not in 'term' mode\n");
return;
}
if (!isatty(modem)) {
mbits &= ~TIOCM_DTR;
ClosePhysicalModem();
return;
}
if (modem >= 0 && Online) {
mbits &= ~TIOCM_DTR;
tcgetattr(modem, &tio);
if (cfsetspeed(&tio, B0) == -1) {
LogPrintf(LogWARN, "Unable to set modem to speed 0\n");
}
tcsetattr(modem, TCSANOW, &tio);
nointr_sleep(1);
}
if (modem >= 0) {
char ScriptBuffer[SCRIPT_LEN];
strncpy(ScriptBuffer, VarHangupScript, sizeof ScriptBuffer - 1);
ScriptBuffer[sizeof ScriptBuffer - 1] = '\0';
LogPrintf(LogDEBUG, "HangupModem: Script: %s\n", ScriptBuffer);
if (flag || !(mode & MODE_DEDICATED)) {
DoChat(ScriptBuffer);
tcflush(modem, TCIOFLUSH);
UnrawModem();
CloseLogicalModem();
} else {
/*
* If we are working as dedicated mode, never close it until we are
* directed to quit program.
*/
mbits |= TIOCM_DTR;
ioctl(modem, TIOCMSET, &mbits);
DoChat(ScriptBuffer);
}
}
}
static void
CloseLogicalModem(void)
{
LogPrintf(LogDEBUG, "CloseLogicalModem\n");
if (modem >= 0) {
ClosePhysicalModem();
if (Utmp) {
struct utmp ut;
strncpy(ut.ut_line, VarBaseDevice, sizeof ut.ut_line - 1);
ut.ut_line[sizeof ut.ut_line - 1] = '\0';
if (logout(ut.ut_line))
logwtmp(ut.ut_line, "", "");
else
LogPrintf(LogERROR, "CloseLogicalModem: No longer logged in on %s\n",
ut.ut_line);
Utmp = 0;
}
UnlockModem();
}
}
/*
* Write to modem. Actualy, requested packets are queued, and goes out
* to the line when ModemStartOutput() is called.
*/
void
WriteModem(int pri, const char *ptr, int count)
{
struct mbuf *bp;
bp = mballoc(count, MB_MODEM);
memcpy(MBUF_CTOP(bp), ptr, count);
/*
* Should be NORMAL and LINK only. All IP frames get here marked NORMAL.
*/
Enqueue(&OutputQueues[pri], bp);
}
void
ModemOutput(int pri, struct mbuf * bp)
{
struct mbuf *wp;
int len;
len = plength(bp);
wp = mballoc(len, MB_MODEM);
mbread(bp, MBUF_CTOP(wp), len);
Enqueue(&OutputQueues[pri], wp);
ModemStartOutput(modem);
}
int
ModemQlen()
{
struct mqueue *queue;
int len = 0;
int i;
for (i = PRI_NORMAL; i <= PRI_LINK; i++) {
queue = &OutputQueues[i];
len += queue->qlen;
}
return (len);
}
void
ModemStartOutput(int fd)
{
struct mqueue *queue;
int nb, nw;
int i;
if (modemout == NULL && ModemQlen() == 0)
IpStartOutput();
if (modemout == NULL) {
i = PRI_LINK;
for (queue = &OutputQueues[PRI_LINK]; queue >= OutputQueues; queue--) {
if (queue->top) {
modemout = Dequeue(queue);
if (LogIsKept(LogDEBUG)) {
if (i > PRI_NORMAL) {
struct mqueue *q;
q = &OutputQueues[0];
LogPrintf(LogDEBUG, "ModemStartOutput: Output from queue %d,"
" normal has %d\n", i, q->qlen);
}
LogPrintf(LogDEBUG, "ModemStartOutput: Dequeued %d\n", i);
}
break;
}
i--;
}
}
if (modemout) {
nb = modemout->cnt;
if (nb > 1600)
nb = 1600;
nw = write(fd, MBUF_CTOP(modemout), nb);
LogPrintf(LogDEBUG, "ModemStartOutput: wrote: %d(%d)\n", nw, nb);
LogDumpBuff(LogDEBUG, "ModemStartOutput: modem write",
MBUF_CTOP(modemout), nb);
if (nw > 0) {
modemout->cnt -= nw;
modemout->offset += nw;
if (modemout->cnt == 0) {
modemout = mbfree(modemout);
LogPrintf(LogDEBUG, "ModemStartOutput: mbfree\n");
}
} else if (nw < 0) {
if (errno != EAGAIN) {
LogPrintf(LogERROR, "modem write (%d): %s\n", modem, strerror(errno));
reconnect(RECON_TRUE);
DownConnection();
}
}
}
}
int
DialModem()
{
char ScriptBuffer[SCRIPT_LEN];
int excode;
strncpy(ScriptBuffer, VarDialScript, sizeof ScriptBuffer - 1);
ScriptBuffer[sizeof ScriptBuffer - 1] = '\0';
if ((excode = DoChat(ScriptBuffer)) > 0) {
if (VarTerm)
fprintf(VarTerm, "dial OK!\n");
strncpy(ScriptBuffer, VarLoginScript, sizeof ScriptBuffer - 1);
if ((excode = DoChat(ScriptBuffer)) > 0) {
VarAltPhone = NULL;
if (VarTerm)
fprintf(VarTerm, "login OK!\n");
return EX_DONE;
} else if (excode == -1)
excode = EX_SIG;
else {
LogPrintf(LogWARN, "DialModem: login failed.\n");
excode = EX_NOLOGIN;
}
ModemTimeout(NULL); /* Dummy call to check modem status */
} else if (excode == -1)
excode = EX_SIG;
else {
LogPrintf(LogWARN, "DialModem: dial failed.\n");
excode = EX_NODIAL;
}
HangupModem(0);
return (excode);
}
int
ShowModemStatus(struct cmdargs const *arg)
{
const char *dev;
#ifdef TIOCOUTQ
int nb;
#endif
if (!VarTerm)
return 1;
dev = *VarDevice ? VarDevice : "network";
fprintf(VarTerm, "device: %s speed: ", dev);
if (DEV_IS_SYNC)
fprintf(VarTerm, "sync\n");
else
fprintf(VarTerm, "%d\n", VarSpeed);
switch (VarParity & CSIZE) {
case CS7:
fprintf(VarTerm, "cs7, ");
break;
case CS8:
fprintf(VarTerm, "cs8, ");
break;
}
if (VarParity & PARENB) {
if (VarParity & PARODD)
fprintf(VarTerm, "odd parity, ");
else
fprintf(VarTerm, "even parity, ");
} else
fprintf(VarTerm, "no parity, ");
fprintf(VarTerm, "CTS/RTS %s.\n", (VarCtsRts ? "on" : "off"));
if (LogIsKept(LogDEBUG))
fprintf(VarTerm, "fd = %d, modem control = %o\n", modem, mbits);
fprintf(VarTerm, "connect count: %d\n", connect_count);
#ifdef TIOCOUTQ
if (modem >= 0)
if (ioctl(modem, TIOCOUTQ, &nb) >= 0)
fprintf(VarTerm, "outq: %d\n", nb);
else
fprintf(VarTerm, "outq: ioctl probe failed: %s\n", strerror(errno));
#endif
fprintf(VarTerm, "outqlen: %d\n", ModemQlen());
fprintf(VarTerm, "DialScript = %s\n", VarDialScript);
fprintf(VarTerm, "LoginScript = %s\n", VarLoginScript);
fprintf(VarTerm, "PhoneNumber(s) = %s\n", VarPhoneList);
fprintf(VarTerm, "\n");
throughput_disp(&throughput, VarTerm);
return 0;
}
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