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tcp_vmsl.c
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C/C++ Source or Header
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1995-09-09
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9KB
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335 lines
/*
* Program: VMS TCP/IP routines for Netlib.
*
* Author: Yehavi Bourvine, The Hebrew University of Jerusalem
* Internet: Yehavi@VMS.huji.ac.il
*
* Date: 2 August 1994
* 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 <descrip.h>
/* 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;
unsigned long sock;
int status;
char *s;
char hostname[MAILTMPLEN];
char tmp[MAILTMPLEN];
/* hostname to connect to */
struct dsc$descriptor HostDesc = { 0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL };
/* assign a local socket */
if (!((status = net_assign (&sock)) & 0x1)) {
sprintf (tmp,"Unable to assign to net, status=%d",status);
mm_log (tmp,ERROR);
return NIL;
}
if (!((status = net_bind (&sock,1)) & 0x1)) {
sprintf (tmp,"Unable to create local socket, status=%d",status);
mm_log (tmp,ERROR);
return NIL;
}
/* open connection */
HostDesc.dsc$w_length = strlen (host);
HostDesc.dsc$a_pointer = host;
if (!((status = tcp_connect (&sock,&HostDesc,port)) & 0x1)) {
sprintf (tmp,"Can't connect to %.80s,%lu: %s",host,port,strerror (errno));
mm_log (tmp,ERROR);
return NIL;
}
/* create TCP/IP stream */
stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
/* copy official host name */
stream->host = cpystr (hostname);
/* copy local host name */
stream->localhost = cpystr (mylocalhost ());
stream->port = port; /* copy port number */
/* init sockets */
stream->tcpsi = stream->tcpso = sock;
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;
}
/* 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,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)
{
char tmp[MAILTMPLEN];
int i,status;
/* Note: the doc says we need here dynamic descriptor, but we need static
* one... */
struct dsc$descriptor BufDesc = {BUFLEN,DSC$K_DTYPE_T,DSC$K_CLASS_S,
stream->ibuf};
static short iosb[4];
if (stream->tcpsi < 0) return NIL;
while (stream->ictr < 1) { /* if nothing in the buffer */
if (!((status = tcp_receive(&(stream->tcpsi), &BufDesc, iosb)) & 0x1)) {
sprintf (tmp,"Error reading from TcpIp/NETLIB, status=%d",status);
mm_log (tmp,ERROR);
return tcp_abort (stream);
}
if (iosb[1] > BUFLEN) i = BUFLEN;
else i = iosb[1];
if (i < 1) return tcp_abort (stream);
stream->ictr = i; /* set new byte count */
stream->iptr = stream->ibuf;/* point at TCP buffer */
}
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)
{
return tcp_sout (stream,string,(unsigned long) strlen (string));
}
/* 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 status;
struct dsc$descriptor_s BufDesc = {strlen(string),DSC$K_DTYPE_T,
DSC$K_CLASS_S,string };
/* 2 = Do not add \r\n */
return ((status = tcp_send (&(stream->tcpso),&BufDesc,2)) & 0x1) ? T :
tcp_abort (stream);
}
/* TCP/IP close
* Accepts: TCP/IP stream
*/
void tcp_close (TCPSTREAM *stream)
{
tcp_abort (stream); /* nuke the stream */
/* flush host names */
fs_give ((void **) &stream->host);
fs_give ((void **) &stream->localhost);
fs_give ((void **) &stream); /* flush the stream */
}
/* TCP/IP abort stream
* Accepts: TCP/IP stream
* Returns: NIL always
*/
long tcp_abort (TCPSTREAM *stream)
{
if (stream->tcpsi >= 0) { /* no-op if no socket */
/* nuke the socket */
tcp_disconnect (&(stream->tcpsi));
stream->tcpsi = stream->tcpso = -1;
}
return NIL;
}
/* TCP/IP get host name
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_host (TCPSTREAM *stream)
{
return stream->host; /* return host name */
}
/* TCP/IP return port for this stream
* Accepts: TCP/IP stream
* Returns: port number for this stream
*/
long tcp_port (TCPSTREAM *stream)
{
return stream->port; /* return port number */
}
/* TCP/IP get local host name
* Accepts: TCP/IP stream
* Returns: local host name
*/
char *tcp_localhost (TCPSTREAM *stream)
{
return stream->localhost; /* return local host name */
}
/* TCP/IP get server host name
* Accepts: pointer to destination
* Returns: string pointer if got results, else NIL
*/
char *tcp_clienthost (char *dst)
{
return "UNKNOWN"; /* needs to be written */
}
/* Return my local host name
* Returns: my local host name
*/
char *mylocalhost ()
{
int status;
char tmp[MAILTMPLEN];
if (!myLocalHost) { /* have local host yet? */
/* receives local host name */
struct dsc$descriptor LocalhostDesc = {0,DSC$K_DTYPE_T,DSC$K_CLASS_D,NULL};
if (!((status = net_get_hostname (&LocalhostDesc)) & 0x1)) {
sprintf (tmp,"Can't get local hostname, status=%d",status);
mm_log (tmp,ERROR);
return "UNKNOWN";
}
strncpy (tmp,LocalhostDesc.dsc$a_pointer,LocalhostDesc.dsc$w_length);
tmp[LocalhostDesc.dsc$w_length] = '\0';
str$free1_dx (&LocalhostDesc);
myLocalHost = cpystr (tmp);
}
return myLocalHost;
}