--- /dev/null
+/* ========================================================================
+ * 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: Waterloo DOS TCP/IP routines
+ *
+ * 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: 13 January 2008
+ */
+
+
+/* Global data */
+
+short sock_initted = 0; /* global so others using net can see it */
+
+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;
+}
+\f
+/* 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;
+ tcp_Socket *sock;
+ char *s,tmp[MAILTMPLEN];
+ unsigned long adr,i,j,k,l;
+ port &= 0xffff; /* erase flags */
+ /* initialize if first time here */
+ if (!sock_initted++) sock_init();
+ /* 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 = 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)
+ 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;
+ }
+ }
+\f
+ /* 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 */
+}
+\f
+/* 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; /* always NIL on DOS */
+}
+\f
+/* 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;
+}
+\f
+/* 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;
+}
+\f
+/* 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;
+}
+\f
+/* 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 */
+}
+\f
+/* 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 */
+}
+
+
+/* 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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