diff options
Diffstat (limited to 'imap/src/osdep/dos/tcp_dwa.c')
-rw-r--r-- | imap/src/osdep/dos/tcp_dwa.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/imap/src/osdep/dos/tcp_dwa.c b/imap/src/osdep/dos/tcp_dwa.c new file mode 100644 index 00000000..4275f27c --- /dev/null +++ b/imap/src/osdep/dos/tcp_dwa.c @@ -0,0 +1,344 @@ +/* ======================================================================== + * 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; +} + +/* 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; + } + } + + /* 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 */ +} + +/* 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 */ +} + +/* 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,(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; +} + +/* 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 */ +} + +/* 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"; +} |