--- /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: VMS TCP/IP routines for Multinet
+ *
+ * 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
+ */
+
+
+static tcptimeout_t tmoh = NIL; /* TCP timeout handler routine */
+static long ttmo_read = 0; /* TCP timeouts, in seconds */
+static long ttmo_write = 0;
+
+static char *tcp_getline_work (TCPSTREAM *stream,unsigned long *size,
+ long *contd);
+\f
+/* TCP/IP manipulate parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *tcp_parameters (long function,void *value)
+{
+ void *ret = NIL;
+ switch ((int) function) {
+ case SET_TIMEOUT:
+ tmoh = (tcptimeout_t) value;
+ case GET_TIMEOUT:
+ ret = (void *) tmoh;
+ break;
+ case SET_READTIMEOUT:
+ ttmo_read = (long) value;
+ case GET_READTIMEOUT:
+ ret = (void *) ttmo_read;
+ break;
+ case SET_WRITETIMEOUT:
+ ttmo_write = (long) value;
+ case GET_WRITETIMEOUT:
+ ret = (void *) ttmo_write;
+ break;
+ }
+ return ret;
+}
+\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;
+ int sock;
+ char *s;
+ struct sockaddr_in sin;
+ struct hostent *host_name;
+ char hostname[MAILTMPLEN];
+ char tmp[MAILTMPLEN];
+ struct protoent *pt = getprotobyname ("tcp");
+ struct servent *sv = NIL;
+ port &= 0xffff; /* erase flags */
+ if (service) { /* service specified? */
+ if (*service == '*') { /* yes, special alt driver kludge? */
+ sv = getservbyname (service + 1,"tcp");
+ }
+ else sv = getservbyname (service,"tcp");
+ }
+ /* user service name port */
+ if (sv) port = ntohs (sin.sin_port = sv->s_port);
+ /* copy port number in network format */
+ else sin.sin_port = htons (port);
+ /* 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] == ']') {
+ strcpy (hostname,host+1); /* yes, copy number part */
+ hostname[(strlen (hostname))-1] = '\0';
+ if ((sin.sin_addr.s_addr = inet_addr (hostname)) != -1) {
+ sin.sin_family = AF_INET; /* family is always Internet */
+ strcpy (hostname,host); /* hostname is user's argument */
+ }
+ else {
+ sprintf (tmp,"Bad format domain-literal: %.80s",host);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ }
+\f
+ else { /* lookup host name, note that brain-dead Unix
+ requires lowercase! */
+ strcpy (hostname,host); /* in case host is in write-protected memory */
+ if ((host_name = gethostbyname (lcase (hostname)))) {
+ /* copy address type */
+ sin.sin_family = host_name->h_addrtype;
+ /* copy host name */
+ strcpy (hostname,host_name->h_name);
+ /* copy host addresses */
+ memcpy (&sin.sin_addr,host_name->h_addr,host_name->h_length);
+ }
+ else {
+ sprintf (tmp,"No such host as %.80s",host);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ }
+ /* get a TCP stream */
+ if ((sock = socket (sin.sin_family,SOCK_STREAM,pt ? pt->p_proto : 0)) < 0) {
+ sprintf (tmp,"Unable to create TCP socket: %s",strerror (errno));
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+#if 0
+ /* Maybe this test is necessary. It depends upon how VMS implements
+ * fd_set. UNIX-style fd_set needs it; Windows-style does not.
+ */
+ else if (sock >= FD_SETSIZE) {/* unselectable sockets are useless */
+ sprintf (tmp,"Unable to create selectable TCP socket (%d >= %d)",
+ sock,FD_SETSIZE);
+ close (sock);
+ return NIL;
+ }
+#endif
+ /* open connection */
+ if (connect (sock,(struct sockaddr *)&sin,sizeof (sin)) < 0) {
+ sprintf (tmp,"Can't connect to %.80s,%d: %s",hostname,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);
+ /* get local name */
+ gethostname (tmp,MAILTMPLEN-1);
+ stream->localhost = cpystr ((host_name = gethostbyname (tmp)) ?
+ host_name->h_name : tmp);
+ /* init sockets */
+ stream->port = port; /* port number */
+ stream->tcpsi = stream->tcpso = sock;
+ 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;
+}
+\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,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 i;
+ fd_set fds,efds;
+ struct timeval tmo;
+ time_t t = time (0);
+ if (stream->tcpsi < 0) return NIL;
+ while (stream->ictr < 1) { /* if nothing in the buffer */
+ time_t tl = time (0); /* start of request */
+ tmo.tv_sec = ttmo_read; /* read timeout */
+ tmo.tv_usec = 0;
+ FD_ZERO (&fds); /* initialize selection vector */
+ FD_ZERO (&efds); /* handle errors too */
+ FD_SET (stream->tcpsi,&fds);/* set bit in selection vector */
+ FD_SET(stream->tcpsi,&efds);/* set bit in error selection vector */
+ errno = NIL; /* block and read */
+ while (((i = select (getdtablesize (),&fds,0,&efds,ttmo_read ? &tmo:0))<0)
+ && (errno == EINTR));
+ if (!i) { /* timeout? */
+ time_t tc = time (0);
+ if (tmoh && ((*tmoh) (tc - t,tc - tl))) continue;
+ else return tcp_abort (stream);
+ }
+ else if (i < 0) return tcp_abort (stream);
+ while (((i = socket_read (stream->tcpsi,stream->ibuf,BUFLEN)) < 0) &&
+ (errno == EINTR));
+ if (i < 1) return tcp_abort (stream);
+ stream->iptr = stream->ibuf;/* point at TCP buffer */
+ stream->ictr = i; /* set new byte count */
+ }
+ return T;
+}
+\f
+/* 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 i;
+ fd_set fds;
+ struct timeval tmo;
+ time_t t = time (0);
+ if (stream->tcpso < 0) return NIL;
+ while (size > 0) { /* until request satisfied */
+ time_t tl = time (0); /* start of request */
+ tmo.tv_sec = ttmo_write; /* write timeout */
+ tmo.tv_usec = 0;
+ FD_ZERO (&fds); /* initialize selection vector */
+ FD_SET (stream->tcpso,&fds);/* set bit in selection vector */
+ errno = NIL; /* block and write */
+ while (((i = select (getdtablesize (),0,&fds,0,ttmo_write ? &tmo : 0)) < 0)
+ && (errno == EINTR));
+ if (!i) { /* timeout? */
+ time_t tc = time (0);
+ if (tmoh && ((*tmoh) (tc - t,tc - tl))) continue;
+ else return tcp_abort (stream);
+ }
+ else if (i < 0) return tcp_abort (stream);
+ while (((i = socket_write (stream->tcpso,string,size)) < 0) &&
+ (errno == EINTR));
+ if (i < 0) return tcp_abort (stream);
+ size -= i; /* how much we sent */
+ string += i;
+ }
+ return T; /* all done */
+}
+\f
+/* 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)
+{
+ int i;
+ if (stream->tcpsi >= 0) { /* no-op if no socket */
+ /* nuke the socket */
+ socket_close (stream->tcpsi);
+ if (stream->tcpsi != stream->tcpso) socket_close (stream->tcpso);
+ stream->tcpsi = stream->tcpso = -1;
+ }
+ return NIL;
+}
+\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 */
+}
+\f
+/* Return my local host name
+ * Returns: my local host name
+ */
+
+char *mylocalhost ()
+{
+ char tmp[MAILTMPLEN];
+ struct hostent *hn;
+ if (!myLocalHost) { /* have local host yet? */
+ gethostname(tmp,MAILTMPLEN);/* get local host name */
+ myLocalHost = cpystr ((hn = gethostbyname (tmp)) ? hn->h_name : 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)
+{
+ char host[MAILTMPLEN];
+ struct hostent *he;
+ /* look like domain literal? */
+ if (name[0] == '[' && name[strlen (name) - 1] == ']') return name;
+ /* note that Unix requires lowercase! */
+ else return (he = gethostbyname (lcase (strcpy (host,name)))) ?
+ he->h_name : name;
+}
+
+
+/* TCP/IP get client host name (server calls only)
+ * Returns: client host name
+ */
+
+char *tcp_clienthost ()
+{
+ return "UNKNOWN";
+}
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