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tcp_mac.c
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C/C++ Source or Header
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1995-09-09
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15KB
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502 lines
/*
* Program: Macintosh TCP/IP routines
*
* Author: Mark Crispin
* 6158 Lariat Loop NE
* Bainbridge Island, WA 98110-2098
* Internet: MRC@Panda.COM
*
* Date: 26 January 1992
* Last Edited: 8 September 1995
*
* Copyright 1995 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 notice appears 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.
*
*/
/* This is a totally new operating-system dependent module for the Macintosh,
* written using THINK C on my Mac PowerBook-100 in my free time.
* Unlike earlier efforts, this version requires no external TCP library. It
* also takes advantage of the Map panel in System 7 for the timezone.
*/
/* TCP timeout handler routine */
static tcptimeout_t tcptimeout = NIL;
/* TCP timeouts, in seconds */
static long tcptimeout_open = 75;
static long tcptimeout_read = 0;
static long tcptimeout_write = 0;
static long tcptimeout_close = 0;
/* TCP/IP manipulate parameters
* Accepts: function code
* function-dependent value
* Returns: function-dependent return value
*/
void *tcp_parameters (long function,void *value)
{
switch ((int) function) {
case SET_TIMEOUT:
tcptimeout = (tcptimeout_t) value;
break;
case GET_TIMEOUT:
value = (void *) tcptimeout;
break;
case SET_OPENTIMEOUT:
tcptimeout_open = (long) value;
break;
case GET_OPENTIMEOUT:
value = (void *) tcptimeout_open;
break;
case SET_READTIMEOUT:
tcptimeout_read = (long) value;
break;
case GET_READTIMEOUT:
value = (void *) tcptimeout_read;
break;
case SET_WRITETIMEOUT:
tcptimeout_write = (long) value;
break;
case GET_WRITETIMEOUT:
value = (void *) tcptimeout_write;
break;
case SET_CLOSETIMEOUT:
tcptimeout_close = (long) value;
break;
case GET_CLOSETIMEOUT:
value = (void *) tcptimeout_close;
break;
default:
value = NIL; /* error case */
break;
}
return value;
}
/* 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,long port)
{
TCPSTREAM *stream;
struct hostInfo hst;
struct TCPCreatePB *createpb;
struct TCPOpenPB *openpb;
char *s;
unsigned long i,j,k,l;
char tmp[MAILTMPLEN];
/* init MacTCP */
if (!TCPdriver && OpenDriver (TCPDRIVER,&TCPdriver)) {
mm_log ("Can't init MacTCP",ERROR);
return NIL;
}
if (!resolveropen && OpenResolver (NIL)) {
mm_log ("Can't init domain resolver",ERROR);
return NIL;
}
resolveropen = T; /* note resolver open now */
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;
}
}
/* 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) {
hst.addr[0] = (i << 24) + (j << 16) + (k << 8) + l;
hst.addr[1] = 0; /* only one address to try! */
sprintf (hst.cname,"[%ld.%ld.%ld.%ld]",i,j,k,l);
}
else {
sprintf (tmp,"Bad format domain-literal: %.80s",host);
mm_log (tmp,ERROR);
return NIL;
}
}
else { /* look up host name */
if (!tcp_dns_upp) tcp_dns_upp = NewResultProc (tcp_dns_result);
if (StrToAddr (host,&hst,tcp_dns_upp,NIL)) {
while (hst.rtnCode == cacheFault && wait ());
/* kludge around MacTCP bug */
if (hst.rtnCode == outOfMemory) {
mm_log ("Re-initializing domain resolver",WARN);
CloseResolver (); /* bop it on the head and try again */
OpenResolver (NIL); /* note this will leak 12K */
StrToAddr (host,&hst,tcp_dns_upp,NIL);
while (hst.rtnCode == cacheFault && wait ());
}
if (hst.rtnCode) { /* still have error status? */
switch (hst.rtnCode) { /* analyze return */
case nameSyntaxErr:
s = "Syntax error in name";
break;
case noResultProc:
s = "No result procedure";
break;
case noNameServer:
s = "No name server found";
break;
case authNameErr:
s = "Host does not exist";
break;
case noAnsErr:
s = "No name servers responding";
break;
case dnrErr:
s = "Name server returned an error";
break;
case outOfMemory:
s = "Not enough memory to resolve name";
break;
case notOpenErr:
s = "Driver not open";
break;
default:
s = NIL;
break;
}
if (s) sprintf (tmp,"%s: %.80s",s,host);
else sprintf (tmp,"Unknown resolver error (%ld): %.80s",
hst.rtnCode,host);
mm_log (tmp,ERROR);
return NIL;
}
}
}
/* create local TCP/IP stream */
stream = (TCPSTREAM *) fs_get (sizeof (TCPSTREAM));
stream->ictr = 0; /* initialize input */
stream->pb.ioCRefNum = TCPdriver;
createpb = &stream->pb.csParam.create;
openpb = &stream->pb.csParam.open;
stream->pb.csCode = TCPCreate;/* create a TCP stream */
/* set up buffer for TCP */
createpb->rcvBuffLen = 4*BUFLEN;
createpb->rcvBuff = fs_get (createpb->rcvBuffLen);
createpb->notifyProc = NIL; /* no special notify procedure */
createpb->userDataPtr = NIL;
if (PBControlSync ((ParmBlkPtr) &stream->pb))
fatal ("Can't create TCP stream");
/* open TCP connection */
stream->pb.csCode = TCPActiveOpen;
openpb->ulpTimeoutValue = (int) tcptimeout_open;
openpb->ulpTimeoutAction = T;
openpb->validityFlags = timeoutValue|timeoutAction;
/* remote host (should try all) */
openpb->remoteHost = hst.addr[0];
openpb->remotePort = port; /* caller specified remote port */
openpb->localPort = 0; /* generate a local port */
openpb->tosFlags = 0; /* no special TOS */
openpb->precedence = 0; /* no special precedence */
openpb->dontFrag = 0; /* allow fragmentation */
openpb->timeToLive = 255; /* standards say 60, UNIX uses 255 */
openpb->security = 0; /* no special security */
openpb->optionCnt = 0; /* no IP options */
openpb->options[0] = 0;
openpb->userDataPtr = NIL; /* no special data pointer */
PBControlAsync ((ParmBlkPtr) &stream->pb);
while (stream->pb.ioResult == inProgress && wait ());
if (stream->pb.ioResult) { /* got back error status? */
sprintf (tmp,"Can't connect to %.80s,%ld",hst.cname,port);
mm_log (tmp,ERROR);
/* nuke the buffer */
stream->pb.csCode = TCPRelease;
createpb->userDataPtr = NIL;
if (PBControlSync ((ParmBlkPtr) &stream->pb)) fatal ("TCPRelease lossage");
/* free its buffer */
fs_give ((void **) &createpb->rcvBuff);
fs_give ((void **) &stream);/* and the local stream */
return NIL;
}
/* copy host names for later use */
stream->host = cpystr (hst.cname);
/* tie off trailing dot */
stream->host[strlen (stream->host) - 1] = '\0';
/* the open gave us our address */
i = (openpb->localHost >> 24) & 0xff;
j = (openpb->localHost >> 16) & 0xff;
k = (openpb->localHost >> 8) & 0xff;
l = openpb->localHost & 0xff;
sprintf (tmp,"[%ld.%ld.%ld.%ld]",i,j,k,l);
stream->localhost = cpystr (tmp);
if (!myLocalHost) myLocalHost = cpystr (tmp);
stream->port = port; /* copy port number */
return stream;
}
/* Called when have return from DNS
* Accepts: host info pointer
* user data pointer
*/
ResultUPP tcp_dns_upp = NIL;
pascal void tcp_dns_result (struct hostInfo *hostInfoPtr,char *userDataPtr)
{
/* dummy routine */
}
/* 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; /* no authenticated opens on Mac */
}
/* 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)
{
time_t t = time (0);
struct TCPReceivePB *receivepb = &stream->pb.csParam.receive;
struct TCPAbortPB *abortpb = &stream->pb.csParam.abort;
while (stream->ictr < 1) { /* if nothing in the buffer */
stream->pb.csCode = TCPRcv; /* receive TCP data */
receivepb->commandTimeoutValue = (int) tcptimeout_read;
receivepb->rcvBuff = stream->ibuf;
receivepb->rcvBuffLen = BUFLEN;
receivepb->secondTimeStamp = 0;
receivepb->userDataPtr = NIL;
PBControlAsync ((ParmBlkPtr) &stream->pb);
while (stream->pb.ioResult == inProgress && wait ());
if ((stream->pb.ioResult == commandTimeout) && tcptimeout &&
((*tcptimeout) (time (0) - t))) continue;
if (stream->pb.ioResult) { /* punt if got an error */
/* nuke connection */
stream->pb.csCode = TCPAbort;
abortpb->userDataPtr = NIL;
PBControlSync ((ParmBlkPtr) &stream->pb);
return NIL;
}
stream->iptr = stream->ibuf;/* point at TCP buffer */
stream->ictr = receivepb->rcvBuffLen;
}
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)
{
struct TCPSendPB *sendpb = &stream->pb.csParam.send;
struct TCPAbortPB *abortpb = &stream->pb.csParam.abort;
struct {
unsigned short length;
Ptr buffer;
unsigned short trailer;
} wds;
while (wds.length = (size > (unsigned long) 32768) ? 32768 : size) {
wds.buffer = string; /* buffer */
wds.trailer = 0; /* tie off buffer */
size -= wds.length; /* this many words will be output */
string += wds.length;
stream->pb.csCode = TCPSend;/* send TCP data */
sendpb->ulpTimeoutValue = (int) tcptimeout_write;
sendpb->ulpTimeoutAction = 0;
sendpb->validityFlags = timeoutValue|timeoutAction;
sendpb->pushFlag = T; /* send the data now */
sendpb->urgentFlag = NIL; /* non-urgent data */
sendpb->wdsPtr = (Ptr) &wds;
sendpb->userDataPtr = NIL;
PBControlAsync ((ParmBlkPtr) &stream->pb);
while (stream->pb.ioResult == inProgress && wait ());
if (stream->pb.ioResult) { /* punt if got an error */
/* nuke connection */
stream->pb.csCode =TCPAbort;
abortpb->userDataPtr = NIL;
PBControlSync ((ParmBlkPtr) &stream->pb);
return NIL;
}
}
return T; /* success */
}
/* TCP/IP close
* Accepts: TCP/IP stream
*/
void tcp_close (TCPSTREAM *stream)
{
struct TCPClosePB *closepb = &stream->pb.csParam.close;
struct TCPCreatePB *createpb = &stream->pb.csParam.create;
stream->pb.csCode = TCPClose; /* close TCP stream */
closepb->ulpTimeoutValue = (int) tcptimeout_close;
closepb->ulpTimeoutAction = 0;
closepb->validityFlags = timeoutValue|timeoutAction;
closepb->userDataPtr = NIL;
PBControlAsync ((ParmBlkPtr) &stream->pb);
while (stream->pb.ioResult == inProgress && wait ());
stream->pb.csCode =TCPRelease;/* flush the buffers */
createpb->userDataPtr = NIL;
if (PBControlSync ((ParmBlkPtr) &stream->pb)) fatal ("TCPRelease lossage");
/* free its buffer */
fs_give ((void **) &createpb->rcvBuff);
/* 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 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 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 */
}