tcp_mac.c
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上传日期:2007-01-04
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- /*
- * 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: 16 December 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 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.
- */
- static tcptimeout_t tmoh = NIL; /* TCP timeout handler routine */
- static long ttmo_open = 75; /* TCP timeouts, in seconds */
- static long ttmo_read = 0;
- static long ttmo_write = 0;
- static long ttmo_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:
- tmoh = (tcptimeout_t) value;
- break;
- case GET_TIMEOUT:
- value = (void *) tmoh;
- break;
- case SET_OPENTIMEOUT:
- ttmo_open = (long) value;
- break;
- case GET_OPENTIMEOUT:
- value = (void *) ttmo_open;
- break;
- case SET_READTIMEOUT:
- ttmo_read = (long) value;
- break;
- case GET_READTIMEOUT:
- value = (void *) ttmo_read;
- break;
- case SET_WRITETIMEOUT:
- ttmo_write = (long) value;
- break;
- case GET_WRITETIMEOUT:
- value = (void *) ttmo_write;
- break;
- case SET_CLOSETIMEOUT:
- ttmo_close = (long) value;
- break;
- case GET_CLOSETIMEOUT:
- value = (void *) ttmo_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,unsigned 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 */
- /* 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) {
- 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) ttmo_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] = ' ';
- /* 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: 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; /* 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 = ' ';
- 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 == ' 15') && (d == ' 12')) {
- ret = (char *) fs_get (n--);
- memcpy (ret,st,n); /* copy into a free storage string */
- ret[n] = ' '; /* 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 == ' 15') && (*stream->iptr == ' 12')) {
- stream->iptr++; /* eat the line feed */
- stream->ictr--;
- ret[n - 1] = ' '; /* 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] = ' '; /* 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] = ' '; /* 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 */
- time_t tl = time (0);
- stream->pb.csCode = TCPRcv; /* receive TCP data */
- receivepb->commandTimeoutValue = (int) ttmo_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) { /* punt if got an error */
- time_t tc = time (0);
- if ((stream->pb.ioResult == commandTimeout) && tmoh &&
- ((*tmoh) (tc - t,tc - tl))) continue;
- /* 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) ttmo_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) ttmo_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 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 i;
- struct hostInfo hst;
- /* look like domain literal? */
- if (name[0] == '[' && name[i = (strlen (name))-1] == ']') return name;
- if (StrToAddr (name,&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 (name,&hst,tcp_dns_upp,NIL);
- while (hst.rtnCode == cacheFault && wait ());
- }
- /* still have error status? */
- if (hst.rtnCode) return name;
- }
- return hst.cname; /* success */
- }
- /* TCP/IP get client host name (server calls only)
- * Returns: client host name
- */
- char *tcp_clienthost ()
- {
- return "UNKNOWN";
- }