freebsd-skq/usr.sbin/ppp/prompt.c
Brian Somers e2ebb036fd Do authentication at the datalink level, not the bundle level.
The bundle doesn't get a LayerUp 'till we're authenticated.

Introduce DATALINK_LCP and DATALINK_AUTH phases.
1998-03-01 01:07:49 +00:00

420 lines
9.7 KiB
C

/*-
* 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: prompt.c,v 1.1.2.9 1998/02/27 01:22:37 brian Exp $
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <termios.h>
#include <unistd.h>
#include "defs.h"
#include "timer.h"
#include "command.h"
#include "log.h"
#include "descriptor.h"
#include "prompt.h"
#include "fsm.h"
#include "bundle.h"
#include "lcp.h"
#include "auth.h"
#include "loadalias.h"
#include "vars.h"
#include "main.h"
#include "iplist.h"
#include "throughput.h"
#include "ipcp.h"
#include "hdlc.h"
#include "async.h"
#include "mbuf.h"
#include "link.h"
#include "physical.h"
#include "chat.h"
#include "ccp.h"
#include "chap.h"
#include "datalink.h"
static int prompt_nonewline = 1;
static int
prompt_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
{
struct prompt *p = descriptor2prompt(d);
int sets;
LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
sets = 0;
if (p->fd_in >= 0) {
if (r) {
FD_SET(p->fd_in, r);
sets++;
}
if (e) {
FD_SET(p->fd_in, e);
sets++;
}
if (sets && *n < p->fd_in + 1)
*n = p->fd_in + 1;
}
return sets;
}
static int
prompt_IsSet(struct descriptor *d, fd_set *fdset)
{
struct prompt *p = descriptor2prompt(d);
LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
return p->fd_in >= 0 && FD_ISSET(p->fd_in, fdset);
}
static void
prompt_ShowHelp(struct prompt *p)
{
prompt_Printf(p, "The following commands are available:\r\n");
prompt_Printf(p, " ~p\tEnter Packet mode\r\n");
prompt_Printf(p, " ~-\tDecrease log level\r\n");
prompt_Printf(p, " ~+\tIncrease log level\r\n");
prompt_Printf(p, " ~t\tShow timers (only in \"log debug\" mode)\r\n");
prompt_Printf(p, " ~m\tShow memory map (only in \"log debug\" mode)\r\n");
prompt_Printf(p, " ~.\tTerminate program\r\n");
prompt_Printf(p, " ~?\tThis help\r\n");
}
static void
prompt_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
{
struct prompt *p = descriptor2prompt(d);
int n;
char ch;
static int ttystate;
char linebuff[LINE_LEN];
LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
LogPrintf(LogDEBUG, "termode = %p, p->fd_in = %d, mode = %d\n",
p->TermMode, p->fd_in, mode);
if (p->TermMode == NULL) {
n = read(p->fd_in, linebuff, sizeof linebuff - 1);
if (n > 0) {
if (linebuff[n-1] == '\n')
linebuff[--n] = '\0';
else
linebuff[n] = '\0';
if (n)
DecodeCommand(bundle, linebuff, n, IsInteractive(0) ? NULL : "Client");
prompt_nonewline = 1;
prompt_Display(&prompt, bundle);
} else if (n <= 0) {
LogPrintf(LogPHASE, "Client connection closed.\n");
prompt_Drop(&prompt, 0);
}
return;
}
switch (p->TermMode->state) {
case DATALINK_CLOSED:
prompt_Printf(p, "Link lost, terminal mode.\n");
prompt_TtyCommandMode(&prompt);
prompt_nonewline = 0;
prompt_Display(&prompt, bundle);
return;
case DATALINK_READY:
break;
case DATALINK_OPEN:
prompt_Printf(p, "\nPacket mode detected.\n");
prompt_TtyCommandMode(&prompt);
prompt_nonewline = 0;
/* We'll get a prompt because of our status change */
/* Fall through */
default:
/* Wait 'till we're in a state we care about */
return;
}
/*
* We are in terminal mode, decode special sequences
*/
n = read(p->fd_in, &ch, 1);
LogPrintf(LogDEBUG, "Got %d bytes (reading from the terminal)\n", n);
if (n > 0) {
switch (ttystate) {
case 0:
if (ch == '~')
ttystate++;
else
/* XXX missing return value check */
Physical_Write(bundle2physical(bundle, NULL), &ch, n);
break;
case 1:
switch (ch) {
case '?':
prompt_ShowHelp(p);
break;
case 'p':
datalink_Up(p->TermMode, 0, 1);
prompt_Printf(p, "\nPacket mode.\n");
prompt_TtyCommandMode(&prompt);
break;
case '.':
prompt_TtyCommandMode(&prompt);
prompt_nonewline = 0;
prompt_Display(&prompt, bundle);
break;
case 't':
if (LogIsKept(LogDEBUG)) {
ShowTimers();
break;
}
case 'm':
if (LogIsKept(LogDEBUG)) {
ShowMemMap(NULL);
break;
}
default:
if (Physical_Write(bundle2physical(bundle, NULL), &ch, n) < 0)
LogPrintf(LogERROR, "error writing to modem.\n");
break;
}
ttystate = 0;
break;
}
}
}
static void
prompt_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
{
/* We never want to write here ! */
LogPrintf(LogERROR, "prompt_Write: Internal error: Bad call !\n");
}
struct prompt prompt = {
{
PROMPT_DESCRIPTOR,
NULL,
prompt_UpdateSet,
prompt_IsSet,
prompt_Read,
prompt_Write
},
-1,
-1,
NULL
};
int
prompt_Init(struct prompt *p, int fd)
{
if (p->Term && p->Term != stdout)
return 0; /* must prompt_Drop() first */
if (fd == PROMPT_NONE) {
p->fd_in = p->fd_out = -1;
p->Term = NULL;
} else if (fd == PROMPT_STD) {
p->fd_in = STDIN_FILENO;
p->fd_out = STDOUT_FILENO;
p->Term = stdout;
} else {
p->fd_in = p->fd_out = fd;
p->Term = fdopen(fd, "a+");
}
p->TermMode = NULL;
tcgetattr(STDIN_FILENO, &p->oldtio); /* Save original tty mode */
return 1;
}
void
prompt_Display(struct prompt *p, struct bundle *bundle)
{
const char *pconnect, *pauth;
if (!p->Term || p->TermMode != NULL || CleaningUp)
return;
if (prompt_nonewline)
prompt_nonewline = 0;
else
fprintf(p->Term, "\n");
if (VarLocalAuth == LOCAL_AUTH)
pauth = " ON ";
else
pauth = " on ";
if (IpcpInfo.fsm.state == ST_OPENED)
pconnect = "PPP";
else if (bundle_Phase(bundle) == PHASE_NETWORK)
pconnect = "PPp";
else if (bundle_Phase(bundle) == PHASE_AUTHENTICATE)
pconnect = "Ppp";
else
pconnect = "ppp";
fprintf(p->Term, "%s%s%s> ", pconnect, pauth, VarShortHost);
fflush(p->Term);
}
void
prompt_Drop(struct prompt *p, int verbose)
{
if (p->Term && p->Term != stdout) {
FILE *oVarTerm;
oVarTerm = p->Term;
p->Term = NULL;
if (oVarTerm)
fclose(oVarTerm);
close(p->fd_in);
if (p->fd_out != p->fd_in)
close(p->fd_out);
p->fd_in = p->fd_out = -1;
if (verbose)
LogPrintf(LogPHASE, "Client connection dropped.\n");
}
}
void
prompt_Printf(struct prompt *p, const char *fmt,...)
{
if (p->Term) {
va_list ap;
va_start(ap, fmt);
vfprintf(p->Term, fmt, ap);
fflush(p->Term);
va_end(ap);
}
}
void
prompt_vPrintf(struct prompt *p, const char *fmt, va_list ap)
{
if (p->Term) {
vfprintf(p->Term, fmt, ap);
fflush(p->Term);
}
}
void
prompt_TtyInit(struct prompt *p, int DontWantInt)
{
struct termios newtio;
int stat;
stat = fcntl(p->fd_in, F_GETFL, 0);
if (stat > 0) {
stat |= O_NONBLOCK;
(void) fcntl(p->fd_in, F_SETFL, stat);
}
newtio = p->oldtio;
newtio.c_lflag &= ~(ECHO | ISIG | ICANON);
newtio.c_iflag = 0;
newtio.c_oflag &= ~OPOST;
newtio.c_cc[VEOF] = _POSIX_VDISABLE;
if (DontWantInt)
newtio.c_cc[VINTR] = _POSIX_VDISABLE;
newtio.c_cc[VMIN] = 1;
newtio.c_cc[VTIME] = 0;
newtio.c_cflag |= CS8;
tcsetattr(p->fd_in, TCSANOW, &newtio);
p->comtio = newtio;
}
/*
* Set tty into command mode. We allow canonical input and echo processing.
*/
void
prompt_TtyCommandMode(struct prompt *p)
{
struct termios newtio;
int stat;
if (!(mode & MODE_INTER))
return;
tcgetattr(p->fd_in, &newtio);
newtio.c_lflag |= (ECHO | ISIG | ICANON);
newtio.c_iflag = p->oldtio.c_iflag;
newtio.c_oflag |= OPOST;
tcsetattr(p->fd_in, TCSADRAIN, &newtio);
stat = fcntl(p->fd_in, F_GETFL, 0);
if (stat > 0) {
stat |= O_NONBLOCK;
(void) fcntl(p->fd_in, F_SETFL, stat);
}
p->TermMode = NULL;
}
/*
* Set tty into terminal mode which is used while we invoke term command.
*/
void
prompt_TtyTermMode(struct prompt *p, struct datalink *dl)
{
int stat;
tcsetattr(p->fd_in, TCSADRAIN, &p->comtio);
stat = fcntl(p->fd_in, F_GETFL, 0);
if (stat > 0) {
stat &= ~O_NONBLOCK;
(void) fcntl(p->fd_in, F_SETFL, stat);
}
p->TermMode = dl;
}
void
prompt_TtyOldMode(struct prompt *p)
{
int stat;
stat = fcntl(p->fd_in, F_GETFL, 0);
if (stat > 0) {
stat &= ~O_NONBLOCK;
(void) fcntl(p->fd_in, F_SETFL, stat);
}
tcsetattr(p->fd_in, TCSADRAIN, &p->oldtio);
}
pid_t
prompt_pgrp(struct prompt *p)
{
return p->Term ? tcgetpgrp(p->fd_in) : -1;
}