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tcp_t20.c
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C/C++ Source or Header
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1998-09-28
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10KB
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334 lines
/*
* Program: TOPS-20 TCP/IP routines
*
* Author: Mark Crispin
* 6158 Lariat Loop NE
* Bainbridge Island, WA 98110-2098
* Internet: MRC@Panda.COM
*
* Date: 1 August 1988
* Last Edited: 28 September 1998
*
* Copyright 1998 by Mark Crispin
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted, provided
* that the above copyright notices appear in all copies and that both the
* above copyright notices and this permission notice appear in supporting
* documentation, and that the name of Mark Crispin not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission. This software is made available "as is", and
* MARK CRISPIN DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO
* THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN NO EVENT SHALL
* MARK CRISPIN BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, TORT (INCLUDING NEGLIGENCE) OR STRICT
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
* THIS SOFTWARE.
*
*/
/* Dedication:
* This file is dedicated with affection to the TOPS-20 operating system, which
* set standards for user and programmer friendliness that have still not been
* equaled by more `modern' operating systems.
* Wasureru mon ka!!!!
*/
/* TCP/IP manipulate parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *tcp_parameters (long function,void *value)
{
return NIL;
}
/* TCP/IP open
* Accepts: host name
* contact service name
* contact port number
* Returns: TCP stream if success else NIL
*/
TCPSTREAM *tcp_open (char *host,char *service,unsigned long port)
{
char *s,tmp[MAILTMPLEN];
TCPSTREAM *stream = NIL;
int argblk[5],jfn;
unsigned long i,j,k,l;
char file[MAILTMPLEN];
/* domain literal? */
if (host[0] == '[' && host[strlen (host)-1] == ']') {
if (((i = strtoul (s = host+1,&s,10)) <= 255) && *s++ == '.' &&
((j = strtoul (s,&s,10)) <= 255) && *s++ == '.' &&
((k = strtoul (s,&s,10)) <= 255) && *s++ == '.' &&
((l = strtoul (s,&s,10)) <= 255) && *s++ == ']' && !*s) {
argblk[3] = (i << 24) + (j << 16) + (k << 8) + l;
sprintf (tmp,"[%lu.%lu.%lu.%lu]",i,j,k,l);
}
else {
sprintf (tmp,"Bad format domain-literal: %.80s",host);
mm_log (tmp,ERROR);
return NIL;
}
}
else { /* host name */
argblk[1] = _GTHPN; /* get IP address and primary name */
argblk[2] = (int) (host-1); /* pointer to host */
argblk[4] = (int) (tmp-1);
if (!jsys (GTHST,argblk)) { /* first try DEC's domain way */
argblk[1] = _GTHPN; /* get IP address and primary name */
argblk[2] = (int) (host-1);
argblk[4] = (int) (tmp-1);
if (!jsys (GTDOM,argblk)){/* try the CHIVES domain way */
argblk[1] = _GTHSN; /* failed, do the host table then */
if (!jsys (GTHST,argblk)) {
sprintf (tmp,"No such host as %s",host);
mm_log (tmp,ERROR);
return NIL;
}
argblk[1] = _GTHNS; /* convert number to string */
argblk[2] = (int) (tmp-1);
/* get the official name */
if (!jsys (GTHST,argblk)) strcpy (tmp,host);
}
}
}
sprintf (file,"TCP:.%o-%d;PERSIST:30;CONNECTION:ACTIVE",argblk[3],port);
argblk[1] = GJ_SHT; /* short form GTJFN% */
argblk[2] = (int) (file-1); /* pointer to file name */
/* get JFN for TCP: file */
if (!jsys (GTJFN,argblk)) fatal ("Unable to create TCP JFN");
jfn = argblk[1]; /* note JFN for later */
/* want 8-bit bidirectional I/O */
argblk[2] = OF_RD|OF_WR|(FLD (8,monsym("OF%BSZ")));
if (!jsys (OPENF,argblk)) {
sprintf (file,"Can't connect to %s,%d server",tmp,port);
mm_log (file,ERROR);
return NIL;
}
/* create TCP/IP stream */
stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
stream->host = cpystr (tmp); /* copy official host name */
argblk[1] = _GTHNS; /* convert number to string */
argblk[2] = (int) (tmp-1);
argblk[3] = -1; /* want local host */
if (!jsys (GTHST,argblk)) strcpy (tmp,"LOCAL");
stream->localhost = cpystr (tmp);
stream->port = port; /* save port number */
stream->jfn = jfn; /* init JFN */
return stream;
}
/* TCP/IP authenticated open
* Accepts: NETMBX specifier
* service name
* returned user name buffer
* Returns: TCP/IP stream if success else NIL
*/
TCPSTREAM *tcp_aopen (NETMBX *mb,char *service,char *usrbuf)
{
return NIL;
}
/* TCP/IP receive line
* Accepts: TCP/IP stream
* Returns: text line string or NIL if failure
*/
char *tcp_getline (TCPSTREAM *stream)
{
int argblk[5];
int n,m;
char *ret,*stp,*st;
argblk[1] = stream->jfn; /* read from TCP */
/* pointer to buffer */
argblk[2] = (int) (stream->ibuf-1);
argblk[3] = BUFLEN; /* max number of bytes to read */
argblk[4] = '\012'; /* terminate on LF */
if (!jsys (SIN,argblk)) return NIL;
n = BUFLEN - argblk[3]; /* number of bytes read */
/* got a complete line? */
if ((stream->ibuf[n - 2] == '\015') && (stream->ibuf[n - 1] == '\012')) {
memcpy ((ret = (char *) fs_get (n)),stream->ibuf,n - 2);
ret[n - 2] = '\0'; /* tie off string with null */
return ret;
}
/* copy partial string */
memcpy ((stp = ret = (char *) fs_get (n)),stream->ibuf,n);
/* special case of newline broken by buffer */
if ((stream->ibuf[n - 1] == '\015') && jsys (BIN,argblk) &&
(argblk[2] == '\012')) { /* was it? */
ret[n - 1] = '\0'; /* tie off string with null */
}
/* recurse to get remainder */
else if (jsys (BKJFN,argblk) && (st = tcp_getline (stream))) {
ret = (char *) fs_get (n + 1 + (m = strlen (st)));
memcpy (ret,stp,n); /* copy first part */
memcpy (ret + n,st,m); /* and second part */
fs_give ((void **) &stp); /* flush first part */
fs_give ((void **) &st); /* flush second part */
ret[n + m] = '\0'; /* tie off string with null */
}
return ret;
}
/* TCP/IP receive buffer
* Accepts: TCP/IP stream
* size in bytes
* buffer to read into
* Returns: T if success, NIL otherwise
*/
long tcp_getbuffer (TCPSTREAM *stream,unsigned long size,char *buffer)
{
int argblk[5];
argblk[1] = stream->jfn; /* read from TCP */
argblk[2] = (int) (buffer-1); /* pointer to buffer */
argblk[3] = -size; /* number of bytes to read */
if (!jsys (SIN,argblk)) return NIL;
buffer[size] = '\0'; /* tie off text */
return T;
}
/* TCP/IP send string as record
* Accepts: TCP/IP stream
* string pointer
* Returns: T if success else NIL
*/
long tcp_soutr (TCPSTREAM *stream,char *string)
{
int argblk[5];
argblk[1] = stream->jfn; /* write to TCP */
argblk[2] = (int) (string-1); /* pointer to buffer */
argblk[3] = 0; /* write until NUL */
if (!jsys (SOUTR,argblk)) return NIL;
return T;
}
/* TCP/IP send string
* Accepts: TCP/IP stream
* string pointer
* byte count
* Returns: T if success else NIL
*/
long tcp_sout (TCPSTREAM *stream,char *string,unsigned long size)
{
int argblk[5];
argblk[1] = stream->jfn; /* write to TCP */
argblk[2] = (int) (string-1); /* pointer to buffer */
argblk[3] = -size; /* write this many bytes */
if (!jsys (SOUTR,argblk)) return NIL;
return T;
}
/* TCP/IP close
* Accepts: TCP/IP stream
*/
void tcp_close (TCPSTREAM *stream)
{
int argblk[5];
argblk[1] = stream->jfn; /* close TCP */
jsys (CLOSF,argblk);
/* flush host names */
fs_give ((void **) &stream->host);
fs_give ((void **) &stream->localhost);
fs_give ((void **) &stream); /* flush the stream */
}
/* TCP/IP return host for this stream
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_host (TCPSTREAM *stream)
{
return stream->host; /* return host name */
}
/* TCP/IP return remote host for this stream
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_remotehost (TCPSTREAM *stream)
{
return stream->host; /* return host name */
}
/* TCP/IP return port for this stream
* Accepts: TCP/IP stream
* Returns: port number for this stream
*/
unsigned long tcp_port (TCPSTREAM *stream)
{
return stream->port; /* return port number */
}
/* TCP/IP return local host for this stream
* Accepts: TCP/IP stream
* Returns: local host name for this stream
*/
char *tcp_localhost (TCPSTREAM *stream)
{
return stream->localhost; /* return local host name */
}
/* TCP/IP return canonical form of host name
* Accepts: host name
* Returns: canonical form of host name
*/
char *tcp_canonical (char *name)
{
int argblk[5];
static char tmp[MAILTMPLEN];
/* look like domain literal? */
if (name[0] == '[' && name[strlen (name) - 1] == ']') return name;
argblk[1] = _GTHPN; /* get IP address and primary name */
argblk[2] = (int) (name-1); /* pointer to host */
argblk[4] = (int) (tmp-1); /* pointer to return destination */
if (!jsys (GTHST,argblk)) { /* first try DEC's domain way */
argblk[1] = _GTHPN; /* get IP address and primary name */
argblk[2] = (int) (name-1);
argblk[4] = (int) (tmp-1);
if (!jsys (GTDOM,argblk)) { /* try the CHIVES domain way */
argblk[1] = _GTHSN; /* failed, do the host table then */
if (!jsys (GTHST,argblk)) return name;
argblk[1] = _GTHNS; /* convert number to string */
argblk[2] = (int) (tmp-1);
/* get the official name */
if (!jsys (GTHST,argblk)) return name;
}
}
return tmp;
}
/* TCP/IP get client host name (server calls only)
* Returns: client host name
*/
char *tcp_clienthost ()
{
return "UNKNOWN";
}