freebsd-dev/usr.sbin/ppp/prompt.c
Brian Somers 30949fd4b5 o Add ipv6 support, abstracting most NCP addresses into opaque
structures (well, they're treated as opaque).

  It's now possible to manage IPv6 interface addresses and routing
  table entries and to filter IPV6 traffic whether encapsulated or
  not.

  IPV6CP support is crude for now, and hasn't been tested against
  any other implementations.

  RADIUS and IPv6 are independent of eachother for now.

  ppp.linkup/ppp.linkdown aren't currently used by IPV6CP

o Understand all protocols(5) in filter rules rather than only a select
  few.

o Allow a mask specification for the ``delete'' command.  It's now
  possible to specifically delete one of two conflicting routes.

o When creating and deleting proxy arp entries, do it for all IPv4
  interface addresses rather than doing it just for the ``current''
  peer address.

o When iface-alias isn't in effect, don't blow away manually (via ``iface
  add'') added interface addresses.

o When listening on a tcp server (diagnostic) socket, bind so that a
  tcp46 socket is created -- allowing both IPv4 and IPv6 connections.

o When displaying ICMP traffic, don't display the icmp type twice.
  When display traffic, display at least some information about unrecognised
  traffic.

o Bump version

Inspired after filtering work by: Makoto MATSUSHITA <matusita@jp.FreeBSD.org>
2001-08-14 16:05:52 +00:00

568 lines
13 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/fcntl.h>
#include <termios.h>
#include <unistd.h>
#include "layer.h"
#include "defs.h"
#include "timer.h"
#include "command.h"
#include "log.h"
#include "descriptor.h"
#include "prompt.h"
#include "fsm.h"
#include "auth.h"
#include "iplist.h"
#include "throughput.h"
#include "slcompress.h"
#include "mbuf.h"
#include "lqr.h"
#include "hdlc.h"
#include "lcp.h"
#include "ncpaddr.h"
#include "ip.h"
#include "ipcp.h"
#include "filter.h"
#include "async.h"
#include "ccp.h"
#include "link.h"
#include "physical.h"
#include "mp.h"
#ifndef NORADIUS
#include "radius.h"
#endif
#include "ipv6cp.h"
#include "ncp.h"
#include "bundle.h"
#include "chat.h"
#include "chap.h"
#include "cbcp.h"
#include "datalink.h"
#include "server.h"
#include "main.h"
static void
prompt_Display(struct prompt *p)
{
/* XXX: See Index2Nam() - should we only figure this out once ? */
static char shostname[MAXHOSTNAMELEN];
const char *pconnect, *pauth;
if (p->TermMode || !p->needprompt)
return;
p->needprompt = 0;
if (p->nonewline)
p->nonewline = 0;
else
fprintf(p->Term, "\n");
if (p->auth == LOCAL_AUTH)
pauth = " ON ";
else
pauth = " on ";
if (p->bundle->ncp.ipcp.fsm.state == ST_OPENED)
pconnect = "PPP";
else if (bundle_Phase(p->bundle) == PHASE_NETWORK)
pconnect = "PPp";
else if (bundle_Phase(p->bundle) == PHASE_AUTHENTICATE)
pconnect = "Ppp";
else
pconnect = "ppp";
if (*shostname == '\0') {
char *dot;
if (gethostname(shostname, sizeof shostname) || *shostname == '\0')
strcpy(shostname, "localhost");
else if ((dot = strchr(shostname, '.')))
*dot = '\0';
}
fprintf(p->Term, "%s%s%s> ", pconnect, pauth, shostname);
fflush(p->Term);
}
static int
prompt_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
{
struct prompt *p = descriptor2prompt(d);
int sets;
sets = 0;
if (!p->active)
return sets;
if (p->fd_in >= 0) {
if (r) {
FD_SET(p->fd_in, r);
log_Printf(LogTIMER, "prompt %s: fdset(r) %d\n", p->src.from, p->fd_in);
sets++;
}
if (e) {
FD_SET(p->fd_in, e);
log_Printf(LogTIMER, "prompt %s: fdset(e) %d\n", p->src.from, p->fd_in);
sets++;
}
if (sets && *n < p->fd_in + 1)
*n = p->fd_in + 1;
}
prompt_Display(p);
return sets;
}
static int
prompt_IsSet(struct fdescriptor *d, const fd_set *fdset)
{
struct prompt *p = descriptor2prompt(d);
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:\n");
prompt_Printf(p, " ~p\tEnter Packet mode\n");
prompt_Printf(p, " ~t\tShow timers\n");
prompt_Printf(p, " ~m\tShow memory map\n");
prompt_Printf(p, " ~.\tTerminate program\n");
prompt_Printf(p, " ~?\tThis help\n");
}
static void
prompt_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
{
struct prompt *p = descriptor2prompt(d);
struct prompt *op;
int n;
char ch;
char linebuff[LINE_LEN];
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';
p->nonewline = 1; /* Maybe command_Decode does a prompt */
prompt_Required(p);
if (n) {
if ((op = log_PromptContext) == NULL)
log_PromptContext = p;
if (!command_Decode(bundle, linebuff, n, p, p->src.from))
prompt_Printf(p, "Syntax error\n");
log_PromptContext = op;
}
} else if (n <= 0) {
log_Printf(LogPHASE, "%s: Client connection closed.\n", p->src.from);
if (!p->owner)
Cleanup(EX_NORMAL);
prompt_Destroy(p, 0);
}
return;
}
switch (p->TermMode->state) {
case DATALINK_CLOSED:
prompt_Printf(p, "Link lost, terminal mode.\n");
prompt_TtyCommandMode(p);
p->nonewline = 0;
prompt_Required(p);
return;
case DATALINK_READY:
break;
case DATALINK_OPEN:
prompt_Printf(p, "\nPacket mode detected.\n");
prompt_TtyCommandMode(p);
p->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);
log_Printf(LogDEBUG, "Got %d bytes (reading from the terminal)\n", n);
if (n > 0) {
switch (p->readtilde) {
case 0:
if (ch == '~')
p->readtilde = 1;
else
if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
prompt_TtyCommandMode(p);
}
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(p);
break;
case '.':
prompt_TtyCommandMode(p);
p->nonewline = 0;
prompt_Required(p);
break;
case 't':
timer_Show(0, p);
break;
case 'm':
{
struct cmdargs arg;
arg.cmdtab = NULL;
arg.cmd = NULL;
arg.argc = 0;
arg.argn = 0;
arg.argv = NULL;
arg.bundle = bundle;
arg.cx = p->TermMode;
arg.prompt = p;
mbuf_Show(&arg);
}
break;
default:
if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
prompt_TtyCommandMode(p);
}
break;
}
p->readtilde = 0;
break;
}
}
}
static int
prompt_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
{
/* We never want to write here ! */
log_Printf(LogALERT, "prompt_Write: Internal error: Bad call !\n");
return 0;
}
struct prompt *
prompt_Create(struct server *s, struct bundle *bundle, int fd)
{
struct prompt *p = (struct prompt *)malloc(sizeof(struct prompt));
if (p != NULL) {
p->desc.type = PROMPT_DESCRIPTOR;
p->desc.UpdateSet = prompt_UpdateSet;
p->desc.IsSet = prompt_IsSet;
p->desc.Read = prompt_Read;
p->desc.Write = prompt_Write;
if (fd == PROMPT_STD) {
char *tty = ttyname(STDIN_FILENO);
if (!tty) {
free(p);
return NULL;
}
p->fd_in = STDIN_FILENO;
p->fd_out = STDOUT_FILENO;
p->Term = stdout;
p->owner = NULL;
p->auth = LOCAL_AUTH;
p->src.type = "Controller";
strncpy(p->src.from, tty, sizeof p->src.from - 1);
p->src.from[sizeof p->src.from - 1] = '\0';
tcgetattr(p->fd_in, &p->oldtio); /* Save original tty mode */
} else {
p->fd_in = p->fd_out = fd;
p->Term = fdopen(fd, "a+");
p->owner = s;
p->auth = *s->cfg.passwd ? LOCAL_NO_AUTH : LOCAL_AUTH;
p->src.type = "unknown";
*p->src.from = '\0';
}
p->TermMode = NULL;
p->nonewline = 1;
p->needprompt = 1;
p->readtilde = 0;
p->bundle = bundle;
log_RegisterPrompt(p);
}
return p;
}
void
prompt_Destroy(struct prompt *p, int verbose)
{
if (p) {
if (p->Term != stdout) {
fclose(p->Term);
close(p->fd_in);
if (p->fd_out != p->fd_in)
close(p->fd_out);
if (verbose)
log_Printf(LogPHASE, "%s: Client connection dropped.\n", p->src.from);
} else
prompt_TtyOldMode(p);
log_UnRegisterPrompt(p);
free(p);
}
}
void
prompt_Printf(struct prompt *p, const char *fmt,...)
{
if (p && p->active) {
va_list ap;
va_start(ap, fmt);
prompt_vPrintf(p, fmt, ap);
va_end(ap);
}
}
void
prompt_vPrintf(struct prompt *p, const char *fmt, va_list ap)
{
if (p && p->active) {
char nfmt[LINE_LEN];
const char *pfmt;
if (p->TermMode) {
/* Stuff '\r' in front of '\n' 'cos we're in raw mode */
int len = strlen(fmt);
if (len && len < sizeof nfmt - 1 && fmt[len-1] == '\n' &&
(len == 1 || fmt[len-2] != '\r')) {
strcpy(nfmt, fmt);
strcpy(nfmt + len - 1, "\r\n");
pfmt = nfmt;
} else
pfmt = fmt;
} else
pfmt = fmt;
vfprintf(p->Term, pfmt, ap);
fflush(p->Term);
p->nonewline = 1;
}
}
void
prompt_TtyInit(struct prompt *p)
{
int stat, fd = p ? p->fd_in : STDIN_FILENO;
struct termios newtio;
stat = fcntl(fd, F_GETFL, 0);
if (stat > 0) {
stat |= O_NONBLOCK;
fcntl(fd, F_SETFL, stat);
}
if (p)
newtio = p->oldtio;
else
tcgetattr(fd, &newtio);
newtio.c_lflag &= ~(ECHO | ISIG | ICANON);
newtio.c_iflag = 0;
newtio.c_oflag &= ~OPOST;
if (!p)
newtio.c_cc[VINTR] = _POSIX_VDISABLE;
newtio.c_cc[VMIN] = 1;
newtio.c_cc[VTIME] = 0;
newtio.c_cflag |= CS8;
tcsetattr(fd, TCSANOW, &newtio);
if (p)
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;
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;
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;
if (p->Term == stdout)
tcsetattr(p->fd_in, TCSADRAIN, &p->comtio);
stat = fcntl(p->fd_in, F_GETFL, 0);
if (stat > 0) {
stat &= ~O_NONBLOCK;
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;
fcntl(p->fd_in, F_SETFL, stat);
}
if (p->Term == stdout)
tcsetattr(p->fd_in, TCSADRAIN, &p->oldtio);
}
pid_t
prompt_pgrp(struct prompt *p)
{
return tcgetpgrp(p->fd_in);
}
int
PasswdCommand(struct cmdargs const *arg)
{
const char *pass;
if (!arg->prompt) {
log_Printf(LogWARN, "passwd: Cannot specify without a prompt\n");
return 0;
}
if (arg->prompt->owner == NULL) {
log_Printf(LogWARN, "passwd: Not required\n");
return 0;
}
if (arg->argc == arg->argn)
pass = "";
else if (arg->argc > arg->argn+1)
return -1;
else
pass = arg->argv[arg->argn];
if (!strcmp(arg->prompt->owner->cfg.passwd, pass))
arg->prompt->auth = LOCAL_AUTH;
else
arg->prompt->auth = LOCAL_NO_AUTH;
return 0;
}
static struct pppTimer bgtimer;
static void
prompt_TimedContinue(void *v)
{
prompt_Continue((struct prompt *)v);
}
void
prompt_Continue(struct prompt *p)
{
timer_Stop(&bgtimer);
if (getpgrp() == prompt_pgrp(p)) {
prompt_TtyCommandMode(p);
p->nonewline = 1;
prompt_Required(p);
log_ActivatePrompt(p);
} else if (!p->owner) {
bgtimer.func = prompt_TimedContinue;
bgtimer.name = "prompt bg";
bgtimer.load = SECTICKS;
bgtimer.arg = p;
timer_Start(&bgtimer);
}
}
void
prompt_Suspend(struct prompt *p)
{
if (getpgrp() == prompt_pgrp(p)) {
prompt_TtyOldMode(p);
log_DeactivatePrompt(p);
}
}