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310c3bab77
freebsd/usr.sbin/ppp/datalink.c
Brian Somers 310c3bab77 Cosmetic: Stop a warning
1998-02-16 00:18:52 +00:00

377 lines
10 KiB
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/*-
* Copyright (c) 1998 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: datalink.c,v 1.1.2.1 1998/02/15 23:59:55 brian Exp $
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <alias.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "loadalias.h"
#include "vars.h"
#include "timer.h"
#include "fsm.h"
#include "lcp.h"
#include "descriptor.h"
#include "hdlc.h"
#include "async.h"
#include "throughput.h"
#include "link.h"
#include "physical.h"
#include "bundle.h"
#include "chat.h"
#include "datalink.h"
#include "ccp.h"
#include "main.h"
#include "modem.h"
#include "iplist.h"
#include "ipcp.h"
static void
datalink_OpenTimeout(void *v)
{
struct datalink *dl = (struct datalink *)v;
StopTimer(&dl->dial_timer);
if (dl->state == DATALINK_OPENING)
LogPrintf(LogPHASE, "%s: Redial timer expired.\n", dl->name);
}
static void
datalink_StartDialTimer(struct datalink *dl, int Timeout)
{
StopTimer(&dl->dial_timer);
if (Timeout) {
dl->dial_timer.state = TIMER_STOPPED;
if (Timeout > 0)
dl->dial_timer.load = Timeout * SECTICKS;
else
dl->dial_timer.load = (random() % REDIAL_PERIOD) * SECTICKS;
dl->dial_timer.func = datalink_OpenTimeout;
dl->dial_timer.arg = dl;
StartTimer(&dl->dial_timer);
if (dl->state == DATALINK_OPENING)
LogPrintf(LogPHASE, "%s: Enter pause (%d) for redialing.\n",
dl->name, Timeout);
}
}
static void
datalink_HangupDone(struct datalink *dl)
{
modem_Close(dl->physical);
if (!dl->dial_tries || (dl->dial_tries < 0 && !dl->reconnect_tries)) {
LogPrintf(LogPHASE, "%s: Entering CLOSED state\n", dl->name);
dl->state = DATALINK_CLOSED;
dl->dial_tries = -1;
dl->reconnect_tries = 0;
bundle_LinkClosed(dl->bundle, dl);
} else {
LogPrintf(LogPHASE, "%s: Entering OPENING state\n", dl->name);
dl->state = DATALINK_OPENING;
}
if (VarNextPhone == NULL)
datalink_StartDialTimer(dl, VarRedialTimeout);
else
datalink_StartDialTimer(dl, VarRedialNextTimeout);
}
static int
datalink_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e,
int *n)
{
struct datalink *dl = descriptor2datalink(d);
int result;
result = 0;
switch (dl->state) {
case DATALINK_CLOSED:
break;
case DATALINK_OPENING:
if (dl->dial_timer.state != TIMER_RUNNING) {
if (--dl->dial_tries < 0)
dl->dial_tries = 0;
if (modem_Open(dl->physical, dl->bundle) >= 0) {
LogPrintf(LogPHASE, "%s: Entering DIAL state\n", dl->name);
dl->state = DATALINK_DIAL;
chat_Init(&dl->chat, dl->physical, VarDialScript, 1);
if (!(mode & MODE_DDIAL) && VarDialTries)
LogPrintf(LogCHAT, "%s: Dial attempt %u of %d\n",
dl->name, VarDialTries - dl->dial_tries, VarDialTries);
} else {
if (!(mode & MODE_DDIAL) && VarDialTries)
LogPrintf(LogCHAT, "Failed to open modem (attempt %u of %d)\n",
VarDialTries - dl->dial_tries, VarDialTries);
else
LogPrintf(LogCHAT, "Failed to open modem\n");
if (!(mode & MODE_DDIAL) && VarDialTries && dl->dial_tries == 0) {
LogPrintf(LogPHASE, "%s: Entering CLOSED state\n", dl->name);
dl->state = DATALINK_CLOSED;
dl->reconnect_tries = 0;
dl->dial_tries = -1;
if (mode & MODE_BACKGROUND)
CleaningUp = 1;
} else
datalink_StartDialTimer(dl, VarRedialTimeout);
}
}
break;
case DATALINK_HANGUP:
case DATALINK_DIAL:
case DATALINK_LOGIN:
result = descriptor_UpdateSet(&dl->chat.desc, r, w, e, n);
switch (dl->chat.state) {
case CHAT_DONE:
/* script succeeded */
switch(dl->state) {
case DATALINK_HANGUP:
datalink_HangupDone(dl);
break;
case DATALINK_DIAL:
LogPrintf(LogPHASE, "%s: Entering LOGIN state\n", dl->name);
dl->state = DATALINK_LOGIN;
chat_Init(&dl->chat, dl->physical, VarLoginScript, 0);
break;
case DATALINK_LOGIN:
dl->dial_tries = 0;
if (modem_Raw(dl->physical, dl->bundle) < 0) {
LogPrintf(LogWARN, "PacketMode: Not connected.\n");
LogPrintf(LogPHASE, "%s: Entering HANGUP state\n", dl->name);
dl->state = DATALINK_HANGUP;
modem_Offline(dl->physical);
chat_Init(&dl->chat, dl->physical, VarHangupScript, 1);
} else {
LogPrintf(LogPHASE, "%s: Entering OPEN state\n", dl->name);
dl->state = DATALINK_OPEN;
dl->dial_tries = -1;
PacketMode(dl->bundle, VarOpenMode);
}
break;
}
break;
case CHAT_FAILED:
/* Going down - script failed */
LogPrintf(LogWARN, "Chat script failed\n");
switch(dl->state) {
case DATALINK_HANGUP:
datalink_HangupDone(dl);
break;
case DATALINK_DIAL:
case DATALINK_LOGIN:
LogPrintf(LogPHASE, "%s: Entering HANGUP state\n", dl->name);
dl->state = DATALINK_HANGUP;
modem_Offline(dl->physical);
chat_Init(&dl->chat, dl->physical, VarHangupScript, 1);
break;
}
break;
}
break;
case DATALINK_OPEN:
result = descriptor_UpdateSet(&dl->physical->desc, r, w, e, n);
break;
}
return result;
}
static int
datalink_IsSet(struct descriptor *d, fd_set *fdset)
{
struct datalink *dl = descriptor2datalink(d);
switch (dl->state) {
case DATALINK_CLOSED:
break;
case DATALINK_HANGUP:
case DATALINK_DIAL:
case DATALINK_LOGIN:
return descriptor_IsSet(&dl->chat.desc, fdset);
case DATALINK_OPEN:
return descriptor_IsSet(&dl->physical->desc, fdset);
}
return 0;
}
static void
datalink_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
{
struct datalink *dl = descriptor2datalink(d);
switch (dl->state) {
case DATALINK_CLOSED:
break;
case DATALINK_HANGUP:
case DATALINK_DIAL:
case DATALINK_LOGIN:
descriptor_Read(&dl->chat.desc, bundle, fdset);
break;
case DATALINK_OPEN:
descriptor_Read(&dl->physical->desc, bundle, fdset);
break;
}
}
static void
datalink_Write(struct descriptor *d, const fd_set *fdset)
{
struct datalink *dl = descriptor2datalink(d);
switch (dl->state) {
case DATALINK_CLOSED:
break;
case DATALINK_HANGUP:
case DATALINK_DIAL:
case DATALINK_LOGIN:
descriptor_Write(&dl->chat.desc, fdset);
break;
case DATALINK_OPEN:
descriptor_Write(&dl->physical->desc, fdset);
break;
}
}
struct datalink *
datalink_Create(const char *name, struct bundle *bundle)
{
struct datalink *dl;
dl = (struct datalink *)malloc(sizeof(struct datalink));
if (dl == NULL)
return dl;
dl->desc.type = DATALINK_DESCRIPTOR;
dl->desc.next = NULL;
dl->desc.UpdateSet = datalink_UpdateSet;
dl->desc.IsSet = datalink_IsSet;
dl->desc.Read = datalink_Read;
dl->desc.Write = datalink_Write;
dl->state = DATALINK_CLOSED;
dl->bundle = bundle;
dl->next = NULL;
memset(&dl->dial_timer, '\0', sizeof dl->dial_timer);
dl->dial_tries = 0;
dl->name = strdup(name);
if ((dl->physical = modem_Create(dl->name)) == NULL) {
free(dl->name);
free(dl);
return NULL;
}
IpcpDefAddress();
LcpInit(dl->bundle, dl->physical);
CcpInit(dl->bundle, &dl->physical->link);
LogPrintf(LogPHASE, "%s: Entering CLOSED state\n", dl->name);
return dl;
}
struct datalink *
datalink_Destroy(struct datalink *dl)
{
struct datalink *result;
if (dl->state != DATALINK_CLOSED)
LogPrintf(LogERROR, "Oops, destroying a datalink in state %d\n", dl->state);
result = dl->next;
chat_Destroy(&dl->chat);
link_Destroy(&dl->physical->link);
free(dl->name);
free(dl);
return result;
}
void
datalink_Up(struct datalink *dl)
{
if (dl->state == DATALINK_CLOSED) {
LogPrintf(LogPHASE, "%s: Entering OPENING state\n", dl->name);
dl->state = DATALINK_OPENING;
dl->reconnect_tries = VarReconnectTries;
dl->dial_tries = VarDialTries;
}
}
void
datalink_Close(struct datalink *dl, int stay)
{
/* Please close */
FsmClose(&CcpInfo.fsm);
FsmClose(&LcpInfo.fsm);
if (stay) {
dl->dial_tries = -1;
dl->reconnect_tries = 0;
}
}
void
datalink_Down(struct datalink *dl, int stay)
{
/* Carrier is lost */
LogPrintf(LogPHASE, "datalink_Down: %sstay down\n", stay ? "" : "don't ");
FsmDown(&CcpInfo.fsm);
FsmClose(&CcpInfo.fsm);
FsmDown(&LcpInfo.fsm);
if (CleaningUp || stay)
FsmClose(&LcpInfo.fsm);
else
FsmOpen(&CcpInfo.fsm);
if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP) {
LogPrintf(LogPHASE, "%s: Entering HANGUP state\n", dl->name);
dl->state = DATALINK_HANGUP;
modem_Offline(dl->physical);
chat_Init(&dl->chat, dl->physical, VarHangupScript, 1);
}
if (stay) {
dl->dial_tries = -1;
dl->reconnect_tries = 0;
}
}
void
datalink_StayDown(struct datalink *dl)
{
dl->reconnect_tries = 0;
}
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