3006ec67fe
This is a type of physical link that can chat and talk LCP & CCP. A bundle contains a list of these (only one in the list for the moment). The datalink is a type of descriptor, and dials, enters LCP (& does CCP), kicks the bundle when its FSMs do something interesting and does the hangup chat script on the way down. It also handles redials and reconnects. There are lots of loose ends, and probably lots of bugs, but the data structures are getting there !
396 lines
8.9 KiB
C
396 lines
8.9 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 1.1.2.2 1998/02/13 05:10:23 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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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 = %d, p->fd_in = %d, mode = %d\n",
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p->TermMode, p->fd_in, mode);
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if (!p->TermMode) {
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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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/*
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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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/*
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* XXX: Should check carrier.
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*/
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if (LcpInfo.fsm.state <= ST_CLOSED)
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PacketMode(bundle, 0);
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break;
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case '.':
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p->TermMode = 1;
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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, const fd_set *fdset)
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{
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/* We don't set the write descriptor (yet) */
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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 = 0;
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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 || 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 = 0;
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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)
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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 = 1;
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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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