Source

XEmacs / lib-src / tcp.c

Full commit
cvs 376386a 
ben 023b83f 
cvs 376386a 




ben 023b83f 
cvs 376386a 
Michael Sperber 061f4f9 



cvs 376386a 
Michael Sperber 061f4f9 



cvs 376386a 

Michael Sperber 061f4f9 
cvs 376386a 










james 13e4746 


cvs 376386a 


















james 13e4746 
cvs 376386a 




















































































































































































/*
 * TCP/IP stream emulation for XEmacs.
 * Copyright (C) 1988, 1989, 1992, 1993 Free Software Foundation, Inc.

 * Author: Masanobu Umeda
 * Maintainer: umerin@mse.kyutech.ac.jp

This file is part of XEmacs.

XEmacs is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with XEmacs.  If not, see <http://www.gnu.org/licenses/>.

 *
 * Yasunari, Itoh at PFU limited contributed for Fujitsu UTS and SX/A.
 *
 * Thu Apr  6 13:47:37 JST 1989
 * USG fixes by Sakaeda <saka@mickey.trad.pf.fujitsu.junet>
 *
 * For Fujitsu UTS compile with:
 *	cc -O -o tcp tcp.c -DFUJITSU_UTS -lu -lsocket
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>

#ifdef FUJITSU_UTS
#define USG
#include <sys/ucbtypes.h>
#include <sys/tisp/socket.h>
#include <netdb.h>
#include <sys/tisp/in.h>
#else
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#endif

#ifdef USG
#include <sys/stat.h>
#include "syssignal.h"
#endif

#ifdef USG
int selectable = 1;

sigout ()
{
  fcntl (fileno (stdin), F_SETFL, 0);
  exit (-1);
}
#endif

main (argc, argv)
     int argc;
     char *argv[];
{
  struct hostent	*host;
  struct sockaddr_in	sockin, sockme;
  struct servent	*serv;
  char	*hostname = NULL;
  char	*service = "nntp";
  int	port;
  int	readfds;
  int   writefds;
  int	server;			/* NNTP Server */
  int	emacsIn = fileno (stdin); /* Emacs intput */
  int	emacsOut = fileno (stdout); /* Emacs output */
  char	buffer[1024];
  int	nbuffer;		/* Number of bytes in buffer */
  int   wret;
  char  *retry;			/* retry bufferp */
  int   false = 0;		/* FALSE flag for setsockopt () */

  if (argc < 2)
    {
      fprintf (stderr, "Usage: %s HOST [SERVICE]\n", argv[0]);
      exit (1);
    }
  if (argc >= 2)
    hostname = argv[1];
  if (argc >= 3)
    service = argv[2];

  if ((host = gethostbyname (hostname)) == NULL)
    {
      perror ("gethostbyname");
      exit (1);
    }
  if (isdigit (service[0]))
    port = atoi (service);
  else
    {
      serv = getservbyname (service, "tcp");
      if (serv == NULL)
	{
	  perror ("getservbyname");
	  exit (1);
	}
      port = serv->s_port;
    }

  memset (&sockin, 0, sizeof (sockin));
  sockin.sin_family = host->h_addrtype;
  memcpy (&sockin.sin_addr, host->h_addr, host->h_length);
  sockin.sin_port = port;
  if ((server = socket (AF_INET, SOCK_STREAM, 0)) < 0)
    {
      perror ("socket");
      exit (1);
    }
  if (setsockopt (server, SOL_SOCKET, SO_REUSEADDR, &false, sizeof (false)))
    {
      perror ("setsockopt");
      exit (1);
    }
  memset (&sockme, 0, sizeof (sockme));
  sockme.sin_family = sockin.sin_family;
  sockme.sin_addr.s_addr = INADDR_ANY;
  if (bind (server, &sockme, sizeof (sockme)) < 0)
    {
      perror ("bind");
      exit (1);
    }
  if (connect (server, &sockin, sizeof (sockin)) < 0)
    {
      perror ("connect");
      close (server);
      exit (1);
    }

#ifdef O_NDELAY
  fcntl (server, F_SETFL, O_NDELAY);

#ifdef USG
  /* USG pipe cannot not select emacsIn */
  {
    struct stat statbuf;
    fstat (emacsIn, &statbuf);
    if (statbuf.st_mode & 010000)
      selectable = 0;
    if (!selectable)
      {
	signal (SIGINT, sigout);
	fcntl (emacsIn, F_SETFL, O_NDELAY);
      }
  }
#endif
#endif

  /* Connection established. */
  while (1)
    {
      readfds = (1 << server) | (1 << emacsIn);
      if (select (32, &readfds, NULL, NULL, (struct timeval *)NULL) == -1)
	{
	  perror ("select");
	  exit (1);
	}
      if (readfds & (1 << emacsIn))
	{
	  /* From Emacs */
	  nbuffer = read (emacsIn, buffer, sizeof buffer -1);

#ifdef USG
	  if (selectable && nbuffer == 0)
	    {
	      goto finish;
	    }
	  else if (!(readfds & (1 << server)) && nbuffer == 0)
	    {
	      sleep (1);
	    }
	  else 
#else
	    if (nbuffer == 0)
	      goto finish;
#endif
	  for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret)
	    {
	      writefds = 1 << server;
	      if (select (server+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1)
		{
		  perror ("select");
		  exit (1);
		}
	      wret = write (server, retry, nbuffer);
	      if (wret < 0) goto finish;
	    }
	}
      if (readfds & (1 << server))
	{
	  /* From NNTP server */
	  nbuffer = read (server, buffer, sizeof buffer -1);
	  if (nbuffer == 0)
	    goto finish;
	  for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret)
	    {
	      writefds = 1 << emacsOut;
#ifdef USG
	      if (selectable)
#endif
		if (select (emacsOut+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1)
		  {
		    perror ("select");
		    exit (1);
		  }
	      wret = write (emacsOut, retry, nbuffer);
	      if (wret < 0) goto finish;
	    }
	}
    }

  /* End of communication. */
 finish:
  close (server);
#ifdef USG
  if (!selectable) fcntl (emacsIn, F_SETFL, 0);
#endif
  close (emacsIn);
  close (emacsOut);
  exit (0);
}