9c749ffb8b
add some logging functionality which I find very useful. 'set debug link' will record just link up/down and address assignments. 'set debug connect' will record the entire chat dialog 'set debug carrier' will record just chat lines including 'CARRIER' (so that I can be sure I'm getting a 28.8 line). There was a global change required to permit LogPrintf to take a bit mask instead of a bit position value (to permit logging some events on either of two flags, so that no change in 'set debug lcp' would result from the code supporting 'link'. Thus the diffs are rather long for such a small change. The man page is also touched. Oh, and there was a slight syntax problem in route.c Reviewed by: phk Submitted by: Tony Kimball <alk@Think.COM>
866 lines
18 KiB
C
866 lines
18 KiB
C
/*
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* User Process PPP
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*
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* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
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*
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* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the Internet Initiative Japan, Inc. The name of the
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* IIJ may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: main.c,v 1.18 1996/04/13 15:47:34 bde Exp $
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*
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* TODO:
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* o Add commands for traffic summary, version display, etc.
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* o Add signal handler for misc controls.
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*/
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#include "fsm.h"
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#include <fcntl.h>
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#include <paths.h>
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#include <sys/time.h>
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#include <termios.h>
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#include <signal.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include "modem.h"
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#include "os.h"
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#include "hdlc.h"
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#include "ccp.h"
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#include "lcp.h"
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#include "ipcp.h"
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#include "vars.h"
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#include "auth.h"
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#include "filter.h"
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#include "systems.h"
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#include "ip.h"
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#define LAUTH_M1 "Warning: No password entry for this host in ppp.secret\n"
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#define LAUTH_M2 "Warning: All manipulation is allowed by anyone in the world\n"
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#ifndef O_NONBLOCK
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#ifdef O_NDELAY
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#define O_NONBLOCK O_NDELAY
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#endif
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#endif
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extern void VjInit(), AsyncInit();
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extern void AsyncInput(), IpOutput();
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extern int SelectSystem();
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extern void DecodeCommand(), Prompt();
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extern int IsInteractive();
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extern struct in_addr ifnetmask;
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static void DoLoop(void);
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static void TerminalStop();
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static struct termios oldtio; /* Original tty mode */
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static struct termios comtio; /* Command level tty mode */
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int TermMode;
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static int server;
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struct sockaddr_in ifsin;
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char pid_filename[128];
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static void
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TtyInit()
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{
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struct termios newtio;
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int stat;
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stat = fcntl(0, F_GETFL, 0);
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stat |= O_NONBLOCK;
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fcntl(0, F_SETFL, stat);
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newtio = 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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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(0, TCSADRAIN, &newtio);
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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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TtyCommandMode(prompt)
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int prompt;
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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(0, &newtio);
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newtio.c_lflag |= (ECHO|ISIG|ICANON);
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newtio.c_iflag = oldtio.c_iflag;
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newtio.c_oflag |= OPOST;
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tcsetattr(0, TCSADRAIN, &newtio);
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stat = fcntl(0, F_GETFL, 0);
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stat |= O_NONBLOCK;
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fcntl(0, F_SETFL, stat);
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TermMode = 0;
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if(prompt) Prompt(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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TtyTermMode()
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{
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int stat;
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tcsetattr(0, TCSADRAIN, &comtio);
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stat = fcntl(0, F_GETFL, 0);
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stat &= ~O_NONBLOCK;
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fcntl(0, F_SETFL, stat);
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TermMode = 1;
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}
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void
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TtyOldMode()
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{
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int stat;
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stat = fcntl(0, F_GETFL, 0);
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stat &= ~O_NONBLOCK;
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fcntl(0, F_SETFL, stat);
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tcsetattr(0, TCSANOW, &oldtio);
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}
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void
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Cleanup(excode)
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int excode;
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{
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OsLinkdown();
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OsCloseLink(1);
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sleep(1);
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if (mode & MODE_AUTO) {
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DeleteIfRoutes(1);
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unlink(pid_filename);
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}
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OsInterfaceDown(1);
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LogPrintf(LOG_PHASE_BIT, "PPP Terminated.\n");
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LogClose();
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if (server > 0)
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close(server);
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TtyOldMode();
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exit(excode);
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}
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static void
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Hangup(signo)
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int signo;
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{
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LogPrintf(LOG_PHASE_BIT, "Signal %d, hangup.\n", signo);
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Cleanup(EX_HANGUP);
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}
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static void
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CloseSession(signo)
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int signo;
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{
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LogPrintf(LOG_PHASE_BIT, "Signal %d, terminate.\n", signo);
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LcpClose();
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Cleanup(EX_TERM);
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}
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static void
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TerminalCont()
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{
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(void)signal(SIGCONT, SIG_DFL);
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(void)signal(SIGTSTP, TerminalStop);
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TtyCommandMode(getpgrp() == tcgetpgrp(0));
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}
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static void
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TerminalStop(signo)
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int signo;
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{
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(void)signal(SIGCONT, TerminalCont);
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TtyOldMode();
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signal(SIGTSTP, SIG_DFL);
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kill(getpid(), signo);
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}
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void
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Usage()
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{
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fprintf(stderr, "Usage: ppp [-auto | -direct | -dedicated] [system]\n");
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exit(EX_START);
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}
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void
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ProcessArgs(int argc, char **argv)
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{
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int optc;
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char *cp;
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optc = 0;
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while (argc > 0 && **argv == '-') {
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cp = *argv + 1;
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if (strcmp(cp, "auto") == 0)
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mode |= MODE_AUTO;
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else if (strcmp(cp, "direct") == 0)
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mode |= MODE_DIRECT;
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else if (strcmp(cp, "dedicated") == 0)
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mode |= MODE_DEDICATED;
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else
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Usage();
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optc++;
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argv++; argc--;
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}
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if (argc > 1) {
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fprintf(stderr, "specify only one system label.\n");
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exit(EX_START);
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}
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if (argc == 1) dstsystem = *argv;
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if (optc > 1) {
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fprintf(stderr, "specify only one mode.\n");
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exit(EX_START);
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}
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}
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static void
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Greetings()
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{
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printf("User Process PPP. Written by Toshiharu OHNO.\r\n");
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fflush(stdout);
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}
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void
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main(argc, argv)
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int argc;
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char **argv;
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{
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int tunno;
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argc--; argv++;
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mode = MODE_INTER; /* default operation is interactive mode */
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netfd = -1;
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ProcessArgs(argc, argv);
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Greetings();
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GetUid();
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IpcpDefAddress();
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if (SelectSystem("default", CONFFILE) < 0) {
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fprintf(stderr, "Warning: No default entry is given in config file.\n");
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}
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if (LogOpen())
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exit(EX_START);
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switch ( LocalAuthInit() ) {
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case NOT_FOUND:
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fprintf(stderr,LAUTH_M1);
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fprintf(stderr,LAUTH_M2);
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fflush (stderr);
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/* Fall down */
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case VALID:
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VarLocalAuth = LOCAL_AUTH;
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break;
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default:
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break;
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}
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if (OpenTunnel(&tunno) < 0) {
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perror("open_tun");
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exit(EX_START);
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}
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if (mode & (MODE_AUTO|MODE_DIRECT|MODE_DEDICATED))
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mode &= ~MODE_INTER;
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if (mode & MODE_INTER) {
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printf("Interactive mode\n");
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netfd = 0;
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} else if (mode & MODE_AUTO) {
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printf("Automatic mode\n");
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if (dstsystem == NULL) {
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fprintf(stderr, "Destination system must be specified in auto mode.\n");
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exit(EX_START);
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}
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}
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tcgetattr(0, &oldtio); /* Save original tty mode */
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signal(SIGHUP, Hangup);
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signal(SIGTERM, CloseSession);
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signal(SIGINT, CloseSession);
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signal(SIGQUIT, CloseSession);
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#ifdef SIGSEGV
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signal(SIGSEGV, Hangup);
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#endif
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#ifdef SIGPIPE
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signal(SIGPIPE, Hangup);
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#endif
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#ifdef SIGALRM
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signal(SIGALRM, SIG_IGN);
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#endif
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if(mode & MODE_INTER)
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{
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#ifdef SIGTSTP
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signal(SIGTSTP, TerminalStop);
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#endif
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#ifdef SIGTTIN
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signal(SIGTTIN, TerminalStop);
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#endif
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#ifdef SIGTTOU
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signal(SIGTTOU, SIG_IGN);
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#endif
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}
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if (dstsystem) {
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if (SelectSystem(dstsystem, CONFFILE) < 0) {
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fprintf(stderr, "Destination system not found in conf file.\n");
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Cleanup(EX_START);
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}
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if ((mode & MODE_AUTO) && DefHisAddress.ipaddr.s_addr == INADDR_ANY) {
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fprintf(stderr, "Must specify dstaddr with auto mode.\n");
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Cleanup(EX_START);
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}
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}
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if (mode & MODE_DIRECT)
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printf("Packet mode enabled.\n");
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#ifdef notdef
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if (mode & MODE_AUTO) {
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OsSetIpaddress(IpcpInfo.want_ipaddr, IpcpInfo.his_ipaddr, ifnetmask);
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}
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#endif
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if (!(mode & MODE_INTER)) {
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int port = SERVER_PORT + tunno;
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/*
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* Create server socket and listen at there.
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*/
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server = socket(PF_INET, SOCK_STREAM, 0);
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if (server < 0) {
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perror("socket");
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Cleanup(EX_SOCK);
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}
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ifsin.sin_family = AF_INET;
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ifsin.sin_addr.s_addr = INADDR_ANY;
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ifsin.sin_port = htons(port);
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if (bind(server, (struct sockaddr *) &ifsin, sizeof(ifsin)) < 0) {
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perror("bind");
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if (errno == EADDRINUSE)
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fprintf(stderr, "Wait for a while, then try again.\n");
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Cleanup(EX_SOCK);
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}
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listen(server, 5);
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DupLog();
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if (!(mode & MODE_DIRECT)) {
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int fd;
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char pid[32];
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if (fork())
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exit(0);
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snprintf(pid_filename, sizeof (pid_filename), "%s/PPP.%s",
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_PATH_VARRUN, dstsystem);
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unlink(pid_filename);
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sprintf(pid, "%d\n", getpid());
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if ((fd = open(pid_filename, O_RDWR|O_CREAT, 0666)) != -1)
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{
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write(fd, pid, strlen(pid));
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close(fd);
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}
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}
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LogPrintf(LOG_PHASE_BIT, "Listening at %d.\n", port);
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#ifdef DOTTYINIT
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if (mode & (MODE_DIRECT|MODE_DEDICATED)) { /* } */
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#else
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if (mode & MODE_DIRECT) {
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#endif
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TtyInit();
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} else {
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int fd;
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setsid(); /* detach control tty */
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if ((fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
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(void)dup2(fd, STDIN_FILENO);
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(void)dup2(fd, STDOUT_FILENO);
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(void)dup2(fd, STDERR_FILENO);
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if (fd > 2)
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(void)close (fd);
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}
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}
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} else {
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server = -1;
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TtyInit();
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TtyCommandMode(1);
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}
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LogPrintf(LOG_PHASE_BIT, "PPP Started.\n");
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do
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DoLoop();
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while (mode & MODE_DEDICATED);
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Cleanup(EX_DONE);
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}
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/*
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* Turn into packet mode, where we speek PPP.
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*/
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void
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PacketMode()
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{
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if (RawModem(modem) < 0) {
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fprintf(stderr, "Not connected.\r\n");
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return;
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}
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AsyncInit();
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VjInit();
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LcpInit();
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IpcpInit();
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CcpInit();
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LcpUp();
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if (mode & (MODE_DIRECT|MODE_DEDICATED))
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LcpOpen(OPEN_ACTIVE);
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else
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LcpOpen(VarOpenMode);
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if ((mode & (MODE_INTER|MODE_AUTO)) == MODE_INTER) {
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TtyCommandMode(1);
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fprintf(stderr, "Packet mode.\r\n");
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}
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}
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static void
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ShowHelp()
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{
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fprintf(stderr, "The following commands are available:\r\n");
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fprintf(stderr, " ~p\tEnter to Packet mode\r\n");
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fprintf(stderr, " ~-\tDecrease log level\r\n");
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fprintf(stderr, " ~+\tIncrease log level\r\n");
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fprintf(stderr, " ~.\tTerminate program\r\n");
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fprintf(stderr, " ~?\tThis help\r\n");
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}
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static void
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ReadTty()
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{
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int n;
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char ch;
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static int ttystate;
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#define MAXLINESIZE 200
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char linebuff[MAXLINESIZE];
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#ifdef DEBUG
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logprintf("termode = %d, netfd = %d, mode = %d\n", TermMode, netfd, mode);
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#endif
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if (!TermMode) {
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n = read(netfd, linebuff, sizeof(linebuff)-1);
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if (n > 0) {
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DecodeCommand(linebuff, n, 1);
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} else {
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#ifdef DEBUG
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logprintf("connection closed.\n");
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#endif
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close(netfd);
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netfd = -1;
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mode &= ~MODE_INTER;
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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(0, &ch, 1);
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#ifdef DEBUG
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logprintf("got %d bytes\n", n);
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#endif
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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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write(modem, &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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ShowHelp();
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break;
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case '-':
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if (loglevel > 0) {
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loglevel--;
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fprintf(stderr, "New loglevel is %d\r\n", loglevel);
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}
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break;
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case '+':
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loglevel++;
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fprintf(stderr, "New loglevel is %d\r\n", loglevel);
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break;
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#ifdef DEBUG
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case 'm':
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ShowMemMap();
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break;
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#endif
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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 (LcpFsm.state <= ST_CLOSED) {
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VarOpenMode = OPEN_ACTIVE;
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PacketMode();
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}
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break;
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#ifdef DEBUG
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case 't':
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ShowTimers();
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break;
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#endif
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case '.':
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TermMode = 1;
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TtyCommandMode(1);
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break;
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default:
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if (write(modem, &ch, n) < 0)
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fprintf(stderr, "err in write.\r\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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/*
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* Here, we'll try to detect HDLC frame
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*/
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|
|
static char *FrameHeaders[] = {
|
|
"\176\377\003\300\041",
|
|
"\176\377\175\043\300\041",
|
|
"\176\177\175\043\100\041",
|
|
"\176\175\337\175\043\300\041",
|
|
"\176\175\137\175\043\100\041",
|
|
NULL,
|
|
};
|
|
|
|
u_char *
|
|
HdlcDetect(cp, n)
|
|
u_char *cp;
|
|
int n;
|
|
{
|
|
char *ptr, *fp, **hp;
|
|
|
|
cp[n] = '\0'; /* be sure to null terminated */
|
|
ptr = NULL;
|
|
for (hp = FrameHeaders; *hp; hp++) {
|
|
fp = *hp;
|
|
if (DEV_IS_SYNC)
|
|
fp++;
|
|
ptr = strstr((char *)cp, fp);
|
|
if (ptr)
|
|
break;
|
|
}
|
|
return((u_char *)ptr);
|
|
}
|
|
|
|
static struct pppTimer RedialTimer;
|
|
|
|
static void
|
|
RedialTimeout()
|
|
{
|
|
StopTimer(&RedialTimer);
|
|
LogPrintf(LOG_PHASE_BIT, "Redialing timer expired.\n");
|
|
}
|
|
|
|
static void
|
|
StartRedialTimer()
|
|
{
|
|
StopTimer(&RedialTimer);
|
|
|
|
if (VarRedialTimeout) {
|
|
LogPrintf(LOG_PHASE_BIT, "Enter pause for redialing.\n");
|
|
RedialTimer.state = TIMER_STOPPED;
|
|
|
|
if (VarRedialTimeout > 0)
|
|
RedialTimer.load = VarRedialTimeout * SECTICKS;
|
|
else
|
|
RedialTimer.load = (random() % REDIAL_PERIOD) * SECTICKS;
|
|
|
|
RedialTimer.func = RedialTimeout;
|
|
StartTimer(&RedialTimer);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
DoLoop()
|
|
{
|
|
fd_set rfds, wfds, efds;
|
|
int pri, i, n, wfd;
|
|
struct sockaddr_in hisaddr;
|
|
struct timeval timeout, *tp;
|
|
int ssize = sizeof(hisaddr);
|
|
u_char *cp;
|
|
u_char rbuff[MAX_MRU];
|
|
int dial_up;
|
|
int tries;
|
|
int qlen;
|
|
pid_t pgroup;
|
|
|
|
pgroup = getpgrp();
|
|
|
|
if (mode & MODE_DIRECT) {
|
|
modem = OpenModem(mode);
|
|
LogPrintf(LOG_PHASE_BIT, "Packet mode enabled\n");
|
|
PacketMode();
|
|
} else if (mode & MODE_DEDICATED) {
|
|
if (!modem)
|
|
modem = OpenModem(mode);
|
|
}
|
|
|
|
fflush(stdout);
|
|
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_usec = 0;
|
|
|
|
dial_up = FALSE; /* XXXX */
|
|
tries = 0;
|
|
for (;;) {
|
|
FD_ZERO(&rfds); FD_ZERO(&wfds); FD_ZERO(&efds);
|
|
|
|
/*
|
|
* If Ip packet for output is enqueued and require dial up,
|
|
* Just do it!
|
|
*/
|
|
if ( dial_up && RedialTimer.state != TIMER_RUNNING ) { /* XXX */
|
|
#ifdef DEBUG
|
|
logprintf("going to dial: modem = %d\n", modem);
|
|
#endif
|
|
modem = OpenModem(mode);
|
|
if (modem < 0) {
|
|
modem = 0; /* Set intial value for next OpenModem */
|
|
StartRedialTimer();
|
|
} else {
|
|
tries++;
|
|
LogPrintf(LOG_CHAT_BIT, "Dial attempt %u\n", tries);
|
|
if (DialModem()) {
|
|
sleep(1); /* little pause to allow peer starts */
|
|
ModemTimeout();
|
|
PacketMode();
|
|
dial_up = FALSE;
|
|
tries = 0;
|
|
} else {
|
|
CloseModem();
|
|
/* Dial failed. Keep quite during redial wait period. */
|
|
StartRedialTimer();
|
|
|
|
if (VarDialTries && tries >= VarDialTries) {
|
|
dial_up = FALSE;
|
|
tries = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
qlen = ModemQlen();
|
|
|
|
if (qlen == 0) {
|
|
IpStartOutput();
|
|
qlen = ModemQlen();
|
|
}
|
|
|
|
if (modem) {
|
|
FD_SET(modem, &rfds);
|
|
FD_SET(modem, &efds);
|
|
if (qlen > 0) {
|
|
FD_SET(modem, &wfds);
|
|
}
|
|
}
|
|
if (server > 0) FD_SET(server, &rfds);
|
|
|
|
/* *** IMPORTANT ***
|
|
*
|
|
* CPU is serviced every TICKUNIT micro seconds.
|
|
* This value must be chosen with great care. If this values is
|
|
* too big, it results loss of characters from modem and poor responce.
|
|
* If this values is too small, ppp process eats many CPU time.
|
|
*/
|
|
#ifndef SIGALRM
|
|
usleep(TICKUNIT);
|
|
TimerService();
|
|
#endif
|
|
|
|
/* If there are aren't many packets queued, look for some more. */
|
|
if (qlen < 20)
|
|
FD_SET(tun_in, &rfds);
|
|
|
|
if (netfd > -1) {
|
|
FD_SET(netfd, &rfds);
|
|
FD_SET(netfd, &efds);
|
|
}
|
|
|
|
#ifndef SIGALRM
|
|
/*
|
|
* Normally, select() will not block because modem is writable.
|
|
* In AUTO mode, select will block until we find packet from tun
|
|
*/
|
|
tp = (RedialTimer.state == TIMER_RUNNING)? &timeout : NULL;
|
|
i = select(tun_in+10, &rfds, &wfds, &efds, tp);
|
|
#else
|
|
/*
|
|
* When SIGALRM timer is running, a select function will be
|
|
* return -1 and EINTR after a Time Service signal hundler
|
|
* is done. If the redial timer is not running and we are
|
|
* trying to dial, poll with a 0 value timer.
|
|
*/
|
|
tp = (dial_up && RedialTimer.state != TIMER_RUNNING) ? &timeout : NULL;
|
|
i = select(tun_in+10, &rfds, &wfds, &efds, tp);
|
|
#endif
|
|
if ( i == 0 ) {
|
|
continue;
|
|
}
|
|
|
|
if ( i < 0 ) {
|
|
if ( errno == EINTR ) {
|
|
continue; /* Got SIGALRM, Do check a queue for dialing */
|
|
}
|
|
perror("select");
|
|
break;
|
|
}
|
|
|
|
if ((netfd > 0 && FD_ISSET(netfd, &efds)) || FD_ISSET(modem, &efds)) {
|
|
logprintf("Exception detected.\n");
|
|
break;
|
|
}
|
|
|
|
if (server > 0 && FD_ISSET(server, &rfds)) {
|
|
#ifdef DEBUG
|
|
logprintf("connected to client.\n");
|
|
#endif
|
|
wfd = accept(server, (struct sockaddr *)&hisaddr, &ssize);
|
|
if (netfd > 0) {
|
|
write(wfd, "already in use.\n", 16);
|
|
close(wfd);
|
|
continue;
|
|
} else
|
|
netfd = wfd;
|
|
if (dup2(netfd, 1) < 0)
|
|
perror("dup2");
|
|
mode |= MODE_INTER;
|
|
Greetings();
|
|
switch ( LocalAuthInit() ) {
|
|
case NOT_FOUND:
|
|
fprintf(stdout,LAUTH_M1);
|
|
fprintf(stdout,LAUTH_M2);
|
|
fflush(stdout);
|
|
/* Fall down */
|
|
case VALID:
|
|
VarLocalAuth = LOCAL_AUTH;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
(void) IsInteractive();
|
|
Prompt(0);
|
|
}
|
|
|
|
if ((mode & MODE_INTER) && FD_ISSET(netfd, &rfds) &&
|
|
((mode & MODE_AUTO) || pgroup == tcgetpgrp(0))) {
|
|
/* something to read from tty */
|
|
ReadTty();
|
|
}
|
|
if (modem) {
|
|
if (FD_ISSET(modem, &wfds)) { /* ready to write into modem */
|
|
ModemStartOutput(modem);
|
|
}
|
|
if (FD_ISSET(modem, &rfds)) { /* something to read from modem */
|
|
if (LcpFsm.state <= ST_CLOSED)
|
|
usleep(10000);
|
|
n = read(modem, rbuff, sizeof(rbuff));
|
|
if ((mode & MODE_DIRECT) && n <= 0) {
|
|
DownConnection();
|
|
} else
|
|
LogDumpBuff(LOG_ASYNC, "ReadFromModem", rbuff, n);
|
|
|
|
if (LcpFsm.state <= ST_CLOSED) {
|
|
/*
|
|
* In dedicated mode, we just discard input until LCP is started.
|
|
*/
|
|
if (!(mode & MODE_DEDICATED)) {
|
|
cp = HdlcDetect(rbuff, n);
|
|
if (cp) {
|
|
/*
|
|
* LCP packet is detected. Turn ourselves into packet mode.
|
|
*/
|
|
if (cp != rbuff) {
|
|
write(1, rbuff, cp - rbuff);
|
|
write(1, "\r\n", 2);
|
|
}
|
|
PacketMode();
|
|
#ifdef notdef
|
|
AsyncInput(cp, n - (cp - rbuff));
|
|
#endif
|
|
} else
|
|
write(1, rbuff, n);
|
|
}
|
|
} else {
|
|
if (n > 0)
|
|
AsyncInput(rbuff, n);
|
|
#ifdef notdef
|
|
continue; /* THIS LINE RESULT AS POOR PERFORMANCE */
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
if (FD_ISSET(tun_in, &rfds)) { /* something to read from tun */
|
|
n = read(tun_in, rbuff, sizeof(rbuff));
|
|
if (n < 0) {
|
|
perror("read from tun");
|
|
continue;
|
|
}
|
|
/*
|
|
* Process on-demand dialup. Output packets are queued within tunnel
|
|
* device until IPCP is opened.
|
|
*/
|
|
if (LcpFsm.state <= ST_CLOSED && (mode & MODE_AUTO)) {
|
|
pri = PacketCheck(rbuff, n, FL_DIAL);
|
|
if (pri >= 0) {
|
|
IpEnqueue(pri, rbuff, n);
|
|
dial_up = TRUE; /* XXX */
|
|
}
|
|
continue;
|
|
}
|
|
pri = PacketCheck(rbuff, n, FL_OUT);
|
|
if (pri >= 0)
|
|
IpEnqueue(pri, rbuff, n);
|
|
}
|
|
}
|
|
logprintf("job done.\n");
|
|
}
|