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/* ========================================================================
* Copyright 1988-2008 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: VMS TCP/IP routines for Netlib.
*
* 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: 2 August 1994
* Last Edited: 13 January 2008
*/
/* Thanks to Yehavi Bourvine at The Hebrew University of Jerusalem who
contributed the original VMS code */
#include <descrip.h>
static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
long *contd);
/* 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,unsigned long port)
{
TCPSTREAM *stream = NIL;
unsigned long sock;
int status;
char tmp[MAILTMPLEN];
/* hostname to connect to */
struct dsc$descriptor HostDesc = { 0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL };
port &= 0xffff; /* erase flags */
/* assign a local socket */
if (!((status = net_assign (&sock)) & 0x1)) {
sprintf (tmp,"Unable to assign to net, status=%d",status);
mm_log (tmp,ERROR);
return NIL;
}
if (!((status = net_bind (&sock,1)) & 0x1)) {
sprintf (tmp,"Unable to create local socket, status=%d",status);
mm_log (tmp,ERROR);
return NIL;
}
/* open connection */
HostDesc.dsc$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));
stream->host = cpystr (host); /* copy official host name */
/* 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: 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 receive line
* Accepts: TCP stream
* Returns: text line string or NIL if failure
*/
char *tcp_getline (TCPSTREAM *stream)
{
unsigned long n,contd;
char *ret = tcp_getline_work (stream,&n,&contd);
if (ret && contd) { /* got a line needing continuation? */
STRINGLIST *stl = mail_newstringlist ();
STRINGLIST *stc = stl;
do { /* collect additional lines */
stc->text.data = (unsigned char *) ret;
stc->text.size = n;
stc = stc->next = mail_newstringlist ();
ret = tcp_getline_work (stream,&n,&contd);
} while (ret && contd);
if (ret) { /* stash final part of line on list */
stc->text.data = (unsigned char *) ret;
stc->text.size = n;
/* determine how large a buffer we need */
for (n = 0, stc = stl; stc; stc = stc->next) n += stc->text.size;
ret = fs_get (n + 1); /* copy parts into buffer */
for (n = 0, stc = stl; stc; n += stc->text.size, stc = stc->next)
memcpy (ret + n,stc->text.data,stc->text.size);
ret[n] = '\0';
}
mail_free_stringlist (&stl);/* either way, done with list */
}
return ret;
}
/* TCP receive line or partial line
* Accepts: TCP stream
* pointer to return size
* pointer to return continuation flag
* Returns: text line string, size and continuation flag, or NIL if failure
*/
static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
long *contd)
{
unsigned long n;
char *s,*ret,c,d;
*contd = NIL; /* assume no continuation */
/* make sure have data */
if (!tcp_getdata (stream)) return NIL;
for (s = stream->iptr, n = 0, c = '\0'; stream->ictr--; n++, c = d) {
d = *stream->iptr++; /* slurp another character */
if ((c == '\015') && (d == '\012')) {
ret = (char *) fs_get (n--);
memcpy (ret,s,*size = n); /* copy into a free storage string */
ret[n] = '\0'; /* tie off string with null */
return ret;
}
}
/* copy partial string from buffer */
memcpy ((ret = (char *) fs_get (n)),s,*size = n);
/* get more data from the net */
if (!tcp_getdata (stream)) fs_give ((void **) &ret);
/* special case of newline broken by buffer */
else if ((c == '\015') && (*stream->iptr == '\012')) {
stream->iptr++; /* eat the line feed */
stream->ictr--;
ret[*size = --n] = '\0'; /* tie off string with null */
}
else *contd = LONGT; /* continuation needed */
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$K_CLASS_S,string };
/* 2 = Do not add \r\n */
return ((status = tcp_send (&(stream->tcpso),&BufDesc,2)) & 0x1) ? T :
tcp_abort (stream);
}
/* TCP/IP close
* Accepts: TCP/IP stream
*/
void tcp_close (TCPSTREAM *stream)
{
tcp_abort (stream); /* nuke the stream */
/* flush host names */
fs_give ((void **) &stream->host);
fs_give ((void **) &stream->localhost);
fs_give ((void **) &stream); /* flush the stream */
}
/* TCP/IP abort stream
* Accepts: TCP/IP stream
* Returns: NIL always
*/
long tcp_abort (TCPSTREAM *stream)
{
if (stream->tcpsi >= 0) { /* no-op if no socket */
/* nuke the socket */
tcp_disconnect (&(stream->tcpsi));
stream->tcpsi = stream->tcpso = -1;
}
return NIL;
}
/* TCP/IP get host name
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_host (TCPSTREAM *stream)
{
return stream->host; /* return host name */
}
/* TCP/IP get remote host name
* Accepts: TCP/IP stream
* Returns: host name for this stream
*/
char *tcp_remotehost (TCPSTREAM *stream)
{
return stream->host; /* return host name */
}
/* TCP/IP return port for this stream
* Accepts: TCP/IP stream
* Returns: port number for this stream
*/
unsigned long tcp_port (TCPSTREAM *stream)
{
return stream->port; /* return port number */
}
/* TCP/IP get local host name
* Accepts: TCP/IP stream
* Returns: local host name
*/
char *tcp_localhost (TCPSTREAM *stream)
{
return stream->localhost; /* return local host name */
}
/* Return my local host name
* Returns: my local host name
*/
char *mylocalhost ()
{
int status;
char tmp[MAILTMPLEN];
if (!myLocalHost) { /* have local host yet? */
/* receives local host name */
struct dsc$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;
}
/* TCP/IP return canonical form of host name
* Accepts: host name
* Returns: canonical form of host name
*/
char *tcp_canonical (char *name)
{
return name;
}
/* TCP/IP get client host name (server calls only)
* Returns: client host name
*/
char *tcp_clienthost ()
{
return "UNKNOWN";
}
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