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os_dwa.c
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C/C++ Source or Header
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1995-09-09
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10KB
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367 lines
/*
* Program: Operating-system dependent routines -- DOS (Waterloo) version
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 11 April 1989
* Last Edited: 8 September 1995
*
* Copyright 1995 by the University of Washington
*
* 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 notice appears in all copies and that both the
* above copyright notice and this permission notice appear in supporting
* documentation, and that the name of the University of Washington 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
* THE UNIVERSITY OF WASHINGTON 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 THE UNIVERSITY OF WASHINGTON 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.
*
*/
#include <tcp.h> /* must be before TCPSTREAM definition */
/* TCP input buffer -- must be large enough to prevent overflow */
#define BUFLEN 8192
/* TCP I/O stream (must be before osdep.h is included) */
#define TCPSTREAM struct tcp_stream
TCPSTREAM {
char *host; /* host name */
long port; /* port number */
char *localhost; /* local host name */
tcp_Socket *tcps; /* tcp socket */
long ictr; /* input counter */
char *iptr; /* input pointer */
char ibuf[BUFLEN]; /* input buffer */
};
/* Private function prototypes */
#include "mail.h"
#include "osdep.h"
#include <time.h>
#include <errno.h>
#include <sys\timeb.h>
#include "misc.h"
/* Undo compatibility definition */
#undef tcp_open
#include "fs_dos.c"
#include "ftl_dos.c"
#include "nl_dos.c"
#include "env_dos.c"
/* Global data */
short sock_initted = 0; /* global so others using net can see it */
/* Return my local host name
* Returns: my local host name
*/
char *mylocalhost (void)
{
if (!myLocalHost) {
char *s,hname[32],tmp[MAILTMPLEN];
long myip;
if (!sock_initted++) sock_init();
tcp_cbrk (0x01); /* turn off ctrl-break catching */
/*
* haven't discovered a way to find out the local host's
* name with wattcp yet.
*/
if (myip = gethostid ()) sprintf (s = tmp,"[%s]",inet_ntoa (hname,myip));
else s = "random-pc";
myLocalHost = cpystr (s);
}
return myLocalHost;
}
/* 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/IP stream if success else NIL
*/
TCPSTREAM *TCP_open (char *host,char *service,long port)
{
TCPSTREAM *stream = NIL;
tcp_Socket *sock;
char *s,tmp[MAILTMPLEN];
long adr,i,j,k,l;
/* initialize if first time here */
if (!sock_initted++) sock_init();
if (s = strchr (host,':')) { /* port number specified? */
*s++ = '\0'; /* yes, tie off port */
port = strtol (s,&s,10); /* parse port */
if (s && *s) {
sprintf (tmp,"Junk after port number: %.80s",s);
mm_log (tmp,ERROR);
return NIL;
}
}
/* The domain literal form is used (rather than simply the dotted decimal
as with other Unix programs) because it has to be a valid "host name"
in mailsystem terminology. */
/* look like domain literal? */
if (host[0] == '[' && host[strlen (host)-1] == ']') {
if (((i = strtol (s = host+1,&s,10)) <= 255) && *s++ == '.' &&
((j = strtol (s,&s,10)) <= 255) && *s++ == '.' &&
((k = strtol (s,&s,10)) <= 255) && *s++ == '.' &&
((l = strtol (s,&s,10)) <= 255) && *s++ == ']' && !*s)
adr = (i << 24) + (j << 16) + (k << 8) + l;
else {
sprintf (tmp,"Bad format domain-literal: %.80s",host);
mm_log (tmp,ERROR);
return NIL;
}
}
else { /* lookup host name */
if (!(adr = resolve (host))) {
sprintf (tmp,"Host not found: %s",host);
mm_log (tmp,ERROR);
return NIL;
}
}
/* OK to instantiate socket now */
sock = (tcp_Socket *) fs_get (sizeof (tcp_Socket));
/* open connection */
if (!tcp_open (sock,(word) 0,adr,(word) port,NULL)) {
sprintf (tmp,"Can't connect to %.80s,%ld",host,port);
mm_log (tmp,ERROR);
fs_give ((void **) &sock);
return NIL;
}
/* create TCP/IP stream */
stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
stream->host = cpystr (host); /* official host name */
stream->localhost = cpystr (mylocalhost ());
stream->port = port; /* port number */
stream->tcps = sock; /* init socket */
stream->ictr = 0; /* init input counter */
return stream; /* return success */
}
/* TCP/IP authenticated open
* Accepts: host name
* service name
* returned user name
* Returns: TCP/IP stream if success else NIL
*/
TCPSTREAM *tcp_aopen (char *host,char *service,char *usrnam)
{
return NIL; /* always NIL on DOS */
}
/* TCP/IP receive line
* Accepts: TCP/IP stream
* Returns: text line string or NIL if failure
*/
char *tcp_getline (TCPSTREAM *stream)
{
int n,m;
char *st,*ret,*stp;
char c = '\0';
char d;
/* make sure have data */
if (!tcp_getdata (stream)) return NIL;
st = stream->iptr; /* save start of string */
n = 0; /* init string count */
while (stream->ictr--) { /* look for end of line */
d = *stream->iptr++; /* slurp another character */
if ((c == '\015') && (d == '\012')) {
ret = (char *) fs_get (n--);
memcpy (ret,st,n); /* copy into a free storage string */
ret[n] = '\0'; /* tie off string with null */
return ret;
}
n++; /* count another character searched */
c = d; /* remember previous character */
}
/* copy partial string from buffer */
memcpy ((ret = stp = (char *) fs_get (n)),st,n);
/* get more data from the net */
if (!tcp_getdata (stream)) return NIL;
/* special case of newline broken by buffer */
if ((c == '\015') && (*stream->iptr == '\012')) {
stream->iptr++; /* eat the line feed */
stream->ictr--;
ret[n - 1] = '\0'; /* tie off string with null */
}
/* else recurse to get remainder */
else if (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)
{
unsigned long n;
char *bufptr = buffer;
while (size > 0) { /* until request satisfied */
if (!tcp_getdata (stream)) return NIL;
n = min (size,stream->ictr);/* number of bytes to transfer */
/* do the copy */
memcpy (bufptr,stream->iptr,(size_t) n);
bufptr += n; /* update pointer */
stream->iptr +=n;
size -= n; /* update # of bytes to do */
stream->ictr -=n;
}
bufptr[0] = '\0'; /* tie off string */
return T;
}
/* TCP/IP receive data
* Accepts: TCP/IP stream
* Returns: T if success, NIL otherwise
*/
long tcp_getdata (TCPSTREAM *stream)
{
int status;
if (!stream->tcps) return NIL;/* no-no nuked socket */
while (stream->ictr < 1) { /* if buffer empty, block for input and read */
if (!_ip_delay1 (stream->tcps,600,NULL,&status))
stream->ictr = sock_fastread (stream->tcps,
stream->iptr = stream->ibuf,BUFLEN);
else if (status == 1) { /* nuke the socket if closed */
sock_close (stream->tcps);
fs_give ((void **) &stream->tcps);
return NIL;
}
}
return T;
}
/* TCP/IP send string as record
* Accepts: TCP/IP stream
* Returns: T if success else NIL
*/
long tcp_soutr (TCPSTREAM *stream,char *string)
{
/* output the cruft */
sock_puts (stream->tcps,string);
return T; /* all done */
}
/* 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)
{
sock_write (stream->tcps,string,(int) size);
return T;
}
/* TCP/IP close
* Accepts: TCP/IP stream
*/
void tcp_close (TCPSTREAM *stream)
{
if (stream->tcps){ /* nuke the socket */
sock_close (stream->tcps);
_ip_delay2 (stream->tcps,0,NULL,NULL);
}
fs_give ((void **) &stream->tcps);
/* flush host names */
fs_give ((void **) &stream->host);
fs_give ((void **) &stream->localhost);
fs_give ((void **) &stream); /* flush the stream */
}
/* TCP/IP get host name
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_host (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
*/
long tcp_port (TCPSTREAM *stream)
{
return stream->port; /* return port number */
}
/* TCP/IP get local host name
* Accepts: TCP/IP stream
* Returns: local host name
*/
char *tcp_localhost (TCPSTREAM *stream)
{
return stream->localhost; /* return local host name */
}