74457d3d43
Allow ``set server open'' to re-open the diagnostic socket. Handle SIGUSR1 by re-opening the diagnostic socket When receiving SIGUSR2 (and in ``set server none''), don't forget the socket details so that ``set server open'' and SIGUSR1 open it again. Don't create the diagnostic socket as uid 0 ! It's far to dangerous.
563 lines
13 KiB
C
563 lines
13 KiB
C
/*-
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* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/fcntl.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#include "defs.h"
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#include "timer.h"
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#include "command.h"
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#include "log.h"
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#include "descriptor.h"
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#include "prompt.h"
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#include "fsm.h"
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#include "auth.h"
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#include "iplist.h"
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#include "throughput.h"
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#include "slcompress.h"
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#include "mbuf.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "lcp.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "async.h"
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#include "ccp.h"
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#include "link.h"
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#include "physical.h"
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#include "mp.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "bundle.h"
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#include "chat.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "datalink.h"
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#include "server.h"
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#include "main.h"
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static void
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prompt_Display(struct prompt *p)
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{
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/* XXX: See Index2Nam() - should we only figure this out once ? */
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static char shostname[MAXHOSTNAMELEN];
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const char *pconnect, *pauth;
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if (p->TermMode || !p->needprompt)
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return;
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p->needprompt = 0;
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if (p->nonewline)
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p->nonewline = 0;
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else
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fprintf(p->Term, "\n");
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if (p->auth == LOCAL_AUTH)
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pauth = " ON ";
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else
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pauth = " on ";
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if (p->bundle->ncp.ipcp.fsm.state == ST_OPENED)
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pconnect = "PPP";
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else if (bundle_Phase(p->bundle) == PHASE_NETWORK)
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pconnect = "PPp";
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else if (bundle_Phase(p->bundle) == PHASE_AUTHENTICATE)
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pconnect = "Ppp";
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else
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pconnect = "ppp";
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if (*shostname == '\0') {
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char *dot;
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if (gethostname(shostname, sizeof shostname))
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strcpy(shostname, "localhost");
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else if ((dot = strchr(shostname, '.')))
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*dot = '\0';
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}
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fprintf(p->Term, "%s%s%s> ", pconnect, pauth, shostname);
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fflush(p->Term);
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}
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static int
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prompt_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
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{
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struct prompt *p = descriptor2prompt(d);
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int sets;
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sets = 0;
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if (!p->active)
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return sets;
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if (p->fd_in >= 0) {
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if (r) {
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FD_SET(p->fd_in, r);
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log_Printf(LogTIMER, "prompt %s: fdset(r) %d\n", p->src.from, p->fd_in);
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sets++;
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}
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if (e) {
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FD_SET(p->fd_in, e);
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log_Printf(LogTIMER, "prompt %s: fdset(e) %d\n", p->src.from, p->fd_in);
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sets++;
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}
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if (sets && *n < p->fd_in + 1)
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*n = p->fd_in + 1;
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}
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prompt_Display(p);
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return sets;
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}
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static int
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prompt_IsSet(struct fdescriptor *d, const fd_set *fdset)
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{
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struct prompt *p = descriptor2prompt(d);
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return p->fd_in >= 0 && FD_ISSET(p->fd_in, fdset);
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}
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static void
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prompt_ShowHelp(struct prompt *p)
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{
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prompt_Printf(p, "The following commands are available:\n");
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prompt_Printf(p, " ~p\tEnter Packet mode\n");
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prompt_Printf(p, " ~t\tShow timers\n");
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prompt_Printf(p, " ~m\tShow memory map\n");
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prompt_Printf(p, " ~.\tTerminate program\n");
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prompt_Printf(p, " ~?\tThis help\n");
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}
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static void
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prompt_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
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{
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struct prompt *p = descriptor2prompt(d);
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struct prompt *op;
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int n;
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char ch;
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char linebuff[LINE_LEN];
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if (p->TermMode == NULL) {
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n = read(p->fd_in, linebuff, sizeof linebuff - 1);
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if (n > 0) {
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if (linebuff[n-1] == '\n')
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linebuff[--n] = '\0';
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else
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linebuff[n] = '\0';
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p->nonewline = 1; /* Maybe command_Decode does a prompt */
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prompt_Required(p);
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if (n) {
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if ((op = log_PromptContext) == NULL)
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log_PromptContext = p;
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if (!command_Decode(bundle, linebuff, n, p, p->src.from))
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prompt_Printf(p, "Syntax error\n");
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log_PromptContext = op;
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}
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} else if (n <= 0) {
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log_Printf(LogPHASE, "%s: Client connection closed.\n", p->src.from);
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if (!p->owner)
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Cleanup(EX_NORMAL);
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prompt_Destroy(p, 0);
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}
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return;
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}
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switch (p->TermMode->state) {
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case DATALINK_CLOSED:
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prompt_Printf(p, "Link lost, terminal mode.\n");
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prompt_TtyCommandMode(p);
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p->nonewline = 0;
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prompt_Required(p);
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return;
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case DATALINK_READY:
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break;
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case DATALINK_OPEN:
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prompt_Printf(p, "\nPacket mode detected.\n");
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prompt_TtyCommandMode(p);
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p->nonewline = 0;
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/* We'll get a prompt because of our status change */
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/* Fall through */
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default:
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/* Wait 'till we're in a state we care about */
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return;
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}
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/*
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* We are in terminal mode, decode special sequences
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*/
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n = read(p->fd_in, &ch, 1);
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log_Printf(LogDEBUG, "Got %d bytes (reading from the terminal)\n", n);
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if (n > 0) {
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switch (p->readtilde) {
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case 0:
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if (ch == '~')
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p->readtilde = 1;
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else
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if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
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log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
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prompt_TtyCommandMode(p);
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}
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break;
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case 1:
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switch (ch) {
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case '?':
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prompt_ShowHelp(p);
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break;
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case 'p':
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datalink_Up(p->TermMode, 0, 1);
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prompt_Printf(p, "\nPacket mode.\n");
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prompt_TtyCommandMode(p);
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break;
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case '.':
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prompt_TtyCommandMode(p);
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p->nonewline = 0;
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prompt_Required(p);
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break;
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case 't':
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timer_Show(0, p);
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break;
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case 'm':
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{
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struct cmdargs arg;
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arg.cmdtab = NULL;
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arg.cmd = NULL;
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arg.argc = 0;
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arg.argn = 0;
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arg.argv = NULL;
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arg.bundle = bundle;
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arg.cx = p->TermMode;
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arg.prompt = p;
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mbuf_Show(&arg);
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}
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break;
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default:
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if (physical_Write(p->TermMode->physical, &ch, n) < 0) {
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log_Printf(LogWARN, "error writing to modem: %s\n", strerror(errno));
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prompt_TtyCommandMode(p);
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}
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break;
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}
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p->readtilde = 0;
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break;
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}
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}
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}
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static int
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prompt_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
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{
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/* We never want to write here ! */
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log_Printf(LogALERT, "prompt_Write: Internal error: Bad call !\n");
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return 0;
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}
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struct prompt *
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prompt_Create(struct server *s, struct bundle *bundle, int fd)
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{
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struct prompt *p = (struct prompt *)malloc(sizeof(struct prompt));
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if (p != NULL) {
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p->desc.type = PROMPT_DESCRIPTOR;
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p->desc.UpdateSet = prompt_UpdateSet;
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p->desc.IsSet = prompt_IsSet;
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p->desc.Read = prompt_Read;
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p->desc.Write = prompt_Write;
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if (fd == PROMPT_STD) {
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char *tty = ttyname(STDIN_FILENO);
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if (!tty) {
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free(p);
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return NULL;
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}
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p->fd_in = STDIN_FILENO;
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p->fd_out = STDOUT_FILENO;
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p->Term = stdout;
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p->owner = NULL;
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p->auth = LOCAL_AUTH;
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p->src.type = "Controller";
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strncpy(p->src.from, tty, sizeof p->src.from - 1);
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p->src.from[sizeof p->src.from - 1] = '\0';
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tcgetattr(p->fd_in, &p->oldtio); /* Save original tty mode */
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} else {
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p->fd_in = p->fd_out = fd;
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p->Term = fdopen(fd, "a+");
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p->owner = s;
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p->auth = *s->cfg.passwd ? LOCAL_NO_AUTH : LOCAL_AUTH;
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p->src.type = "unknown";
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*p->src.from = '\0';
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}
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p->TermMode = NULL;
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p->nonewline = 1;
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p->needprompt = 1;
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p->readtilde = 0;
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p->bundle = bundle;
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log_RegisterPrompt(p);
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}
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return p;
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}
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void
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prompt_Destroy(struct prompt *p, int verbose)
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{
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if (p) {
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if (p->Term != stdout) {
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fclose(p->Term);
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close(p->fd_in);
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if (p->fd_out != p->fd_in)
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close(p->fd_out);
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if (verbose)
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log_Printf(LogPHASE, "%s: Client connection dropped.\n", p->src.from);
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} else
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prompt_TtyOldMode(p);
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log_UnRegisterPrompt(p);
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free(p);
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}
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}
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void
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prompt_Printf(struct prompt *p, const char *fmt,...)
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{
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if (p && p->active) {
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va_list ap;
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va_start(ap, fmt);
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prompt_vPrintf(p, fmt, ap);
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va_end(ap);
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}
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}
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void
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prompt_vPrintf(struct prompt *p, const char *fmt, va_list ap)
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{
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if (p && p->active) {
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char nfmt[LINE_LEN];
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const char *pfmt;
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if (p->TermMode) {
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/* Stuff '\r' in front of '\n' 'cos we're in raw mode */
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int len = strlen(fmt);
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if (len && len < sizeof nfmt - 1 && fmt[len-1] == '\n' &&
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(len == 1 || fmt[len-2] != '\r')) {
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strcpy(nfmt, fmt);
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strcpy(nfmt + len - 1, "\r\n");
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pfmt = nfmt;
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} else
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pfmt = fmt;
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} else
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pfmt = fmt;
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vfprintf(p->Term, pfmt, ap);
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fflush(p->Term);
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p->nonewline = 1;
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}
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}
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void
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prompt_TtyInit(struct prompt *p)
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{
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int stat, fd = p ? p->fd_in : STDIN_FILENO;
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struct termios newtio;
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stat = fcntl(fd, F_GETFL, 0);
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if (stat > 0) {
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stat |= O_NONBLOCK;
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fcntl(fd, F_SETFL, stat);
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}
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if (p)
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newtio = p->oldtio;
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else
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tcgetattr(fd, &newtio);
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newtio.c_lflag &= ~(ECHO | ISIG | ICANON);
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newtio.c_iflag = 0;
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newtio.c_oflag &= ~OPOST;
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if (!p)
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newtio.c_cc[VINTR] = _POSIX_VDISABLE;
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newtio.c_cc[VMIN] = 1;
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newtio.c_cc[VTIME] = 0;
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newtio.c_cflag |= CS8;
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tcsetattr(fd, TCSANOW, &newtio);
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if (p)
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p->comtio = newtio;
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}
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/*
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* Set tty into command mode. We allow canonical input and echo processing.
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*/
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void
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prompt_TtyCommandMode(struct prompt *p)
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{
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struct termios newtio;
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int stat;
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tcgetattr(p->fd_in, &newtio);
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newtio.c_lflag |= (ECHO | ISIG | ICANON);
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newtio.c_iflag = p->oldtio.c_iflag;
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newtio.c_oflag |= OPOST;
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tcsetattr(p->fd_in, TCSADRAIN, &newtio);
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stat = fcntl(p->fd_in, F_GETFL, 0);
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if (stat > 0) {
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stat |= O_NONBLOCK;
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fcntl(p->fd_in, F_SETFL, stat);
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}
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p->TermMode = NULL;
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}
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/*
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* Set tty into terminal mode which is used while we invoke term command.
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*/
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void
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prompt_TtyTermMode(struct prompt *p, struct datalink *dl)
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{
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int stat;
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if (p->Term == stdout)
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tcsetattr(p->fd_in, TCSADRAIN, &p->comtio);
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stat = fcntl(p->fd_in, F_GETFL, 0);
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if (stat > 0) {
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stat &= ~O_NONBLOCK;
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fcntl(p->fd_in, F_SETFL, stat);
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}
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p->TermMode = dl;
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}
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void
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prompt_TtyOldMode(struct prompt *p)
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{
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int stat;
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stat = fcntl(p->fd_in, F_GETFL, 0);
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if (stat > 0) {
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stat &= ~O_NONBLOCK;
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fcntl(p->fd_in, F_SETFL, stat);
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}
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if (p->Term == stdout)
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tcsetattr(p->fd_in, TCSADRAIN, &p->oldtio);
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}
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pid_t
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prompt_pgrp(struct prompt *p)
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{
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return tcgetpgrp(p->fd_in);
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}
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int
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PasswdCommand(struct cmdargs const *arg)
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{
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const char *pass;
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if (!arg->prompt) {
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log_Printf(LogWARN, "passwd: Cannot specify without a prompt\n");
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return 0;
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}
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if (arg->prompt->owner == NULL) {
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log_Printf(LogWARN, "passwd: Not required\n");
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return 0;
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}
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if (arg->argc == arg->argn)
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pass = "";
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else if (arg->argc > arg->argn+1)
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return -1;
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else
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pass = arg->argv[arg->argn];
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if (!strcmp(arg->prompt->owner->cfg.passwd, pass))
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arg->prompt->auth = LOCAL_AUTH;
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else
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arg->prompt->auth = LOCAL_NO_AUTH;
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return 0;
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}
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static struct pppTimer bgtimer;
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static void
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prompt_TimedContinue(void *v)
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{
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prompt_Continue((struct prompt *)v);
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}
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void
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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);
|
|
}
|
|
}
|