f4768038f0
Struct bundle will have its own struct ccp in the future too. o The ``set stopped'' command now requires context and doesn't work on the IPCP FSM. o Check if it's time to break out of our top level loop before doing a select - otherwise, we'll select forever :-( o Remove `struct link'::ccp (a temporary hack). It turns out that IpStartOutput() calls link_Output() and link_Output() incorrectly calls StartOutput() (really modem_StartOutput) requiring the ccp knowledge so that it can call IpStartOutput()... The end result is that the whole IP output queue gets dumped into the modem output queue and a pile of physical writes are done prematurely. This makes the (original) code in main() actually work in that it would not bother selecting() on the tun descriptor when our modem queue length was 20 or greater. Instead, we now make that decision based on the overall queue length. This will need improvement later.
419 lines
9.7 KiB
C
419 lines
9.7 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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* $Id: prompt.c,v 1.1.2.7 1998/02/17 19:28:35 brian Exp $
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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 <stdarg.h>
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#include <stdio.h>
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#include <sys/fcntl.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <unistd.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 "bundle.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 "lcp.h"
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#include "auth.h"
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#include "loadalias.h"
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#include "vars.h"
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#include "main.h"
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#include "iplist.h"
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#include "throughput.h"
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#include "ipcp.h"
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#include "hdlc.h"
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#include "async.h"
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#include "mbuf.h"
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#include "link.h"
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#include "physical.h"
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#include "chat.h"
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#include "ccp.h"
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#include "datalink.h"
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static int prompt_nonewline = 1;
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static int
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prompt_UpdateSet(struct descriptor *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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LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
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sets = 0;
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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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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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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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return sets;
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}
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static int
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prompt_IsSet(struct descriptor *d, fd_set *fdset)
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{
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struct prompt *p = descriptor2prompt(d);
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LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
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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:\r\n");
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prompt_Printf(p, " ~p\tEnter Packet mode\r\n");
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prompt_Printf(p, " ~-\tDecrease log level\r\n");
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prompt_Printf(p, " ~+\tIncrease log level\r\n");
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prompt_Printf(p, " ~t\tShow timers (only in \"log debug\" mode)\r\n");
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prompt_Printf(p, " ~m\tShow memory map (only in \"log debug\" mode)\r\n");
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prompt_Printf(p, " ~.\tTerminate program\r\n");
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prompt_Printf(p, " ~?\tThis help\r\n");
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}
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static void
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prompt_Read(struct descriptor *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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int n;
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char ch;
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static int ttystate;
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char linebuff[LINE_LEN];
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LogPrintf(LogDEBUG, "descriptor2prompt; %p -> %p\n", d, p);
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LogPrintf(LogDEBUG, "termode = %p, p->fd_in = %d, mode = %d\n",
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p->TermMode, p->fd_in, mode);
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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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if (n)
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DecodeCommand(bundle, linebuff, n, IsInteractive(0) ? NULL : "Client");
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prompt_nonewline = 1;
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prompt_Display(&prompt, bundle);
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} else if (n <= 0) {
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LogPrintf(LogPHASE, "Client connection closed.\n");
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prompt_Drop(&prompt, 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(&prompt);
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prompt_nonewline = 0;
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prompt_Display(&prompt, bundle);
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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(&prompt);
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prompt_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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LogPrintf(LogDEBUG, "Got %d bytes (reading from the terminal)\n", n);
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if (n > 0) {
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switch (ttystate) {
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case 0:
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if (ch == '~')
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ttystate++;
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else
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/* XXX missing return value check */
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Physical_Write(bundle2physical(bundle, NULL), &ch, n);
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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(&prompt);
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break;
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case '.':
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prompt_TtyCommandMode(&prompt);
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prompt_nonewline = 0;
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prompt_Display(&prompt, bundle);
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break;
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case 't':
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if (LogIsKept(LogDEBUG)) {
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ShowTimers();
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break;
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}
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case 'm':
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if (LogIsKept(LogDEBUG)) {
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ShowMemMap(NULL);
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break;
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}
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default:
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if (Physical_Write(bundle2physical(bundle, NULL), &ch, n) < 0)
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LogPrintf(LogERROR, "error writing to modem.\n");
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break;
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}
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ttystate = 0;
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break;
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}
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}
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}
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static void
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prompt_Write(struct descriptor *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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LogPrintf(LogERROR, "prompt_Write: Internal error: Bad call !\n");
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}
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struct prompt prompt = {
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{
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PROMPT_DESCRIPTOR,
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NULL,
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prompt_UpdateSet,
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prompt_IsSet,
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prompt_Read,
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prompt_Write
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},
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-1,
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-1,
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NULL
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};
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int
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prompt_Init(struct prompt *p, int fd)
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{
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if (p->Term && p->Term != stdout)
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return 0; /* must prompt_Drop() first */
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if (fd == PROMPT_NONE) {
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p->fd_in = p->fd_out = -1;
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p->Term = NULL;
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} else if (fd == PROMPT_STD) {
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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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} 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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}
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p->TermMode = NULL;
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tcgetattr(STDIN_FILENO, &p->oldtio); /* Save original tty mode */
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return 1;
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}
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void
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prompt_Display(struct prompt *p, struct bundle *bundle)
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{
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const char *pconnect, *pauth;
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if (!p->Term || p->TermMode != NULL || CleaningUp)
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return;
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if (prompt_nonewline)
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prompt_nonewline = 0;
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else
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fprintf(p->Term, "\n");
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if (VarLocalAuth == LOCAL_AUTH)
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pauth = " ON ";
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else
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pauth = " on ";
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if (IpcpInfo.fsm.state == ST_OPENED)
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pconnect = "PPP";
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else if (bundle_Phase(bundle) == PHASE_NETWORK)
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pconnect = "PPp";
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else if (bundle_Phase(bundle) == PHASE_AUTHENTICATE)
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pconnect = "Ppp";
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else
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pconnect = "ppp";
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fprintf(p->Term, "%s%s%s> ", pconnect, pauth, VarShortHost);
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fflush(p->Term);
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}
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void
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prompt_Drop(struct prompt *p, int verbose)
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{
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if (p->Term && p->Term != stdout) {
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FILE *oVarTerm;
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oVarTerm = p->Term;
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p->Term = NULL;
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if (oVarTerm)
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fclose(oVarTerm);
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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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p->fd_in = p->fd_out = -1;
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if (verbose)
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LogPrintf(LogPHASE, "Client connection dropped.\n");
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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->Term) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(p->Term, fmt, ap);
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fflush(p->Term);
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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->Term) {
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vfprintf(p->Term, fmt, ap);
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fflush(p->Term);
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}
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}
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void
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prompt_TtyInit(struct prompt *p, int DontWantInt)
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{
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struct termios newtio;
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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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(void) fcntl(p->fd_in, F_SETFL, stat);
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}
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newtio = p->oldtio;
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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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newtio.c_cc[VEOF] = _POSIX_VDISABLE;
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if (DontWantInt)
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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(p->fd_in, TCSANOW, &newtio);
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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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if (!(mode & MODE_INTER))
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return;
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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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(void) 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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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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(void) 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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(void) fcntl(p->fd_in, F_SETFL, stat);
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}
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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 p->Term ? tcgetpgrp(p->fd_in) : -1;
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}
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