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nntp.c
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C/C++ Source or Header
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1994-01-19
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4KB
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118 lines
/*
* Program: Network News Transfer Protocol (NNTP) 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: 10 February 1992
* Last Edited: 23 October 1993
*
* Copyright 1993 by the University of Washington.
*
* 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 notices appear in all copies and that both the
* above copyright notices and this permission notice appear in supporting
* documentation, and that the name of the University of Washington 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
* THE UNIVERSITY OF WASHINGTON 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 THE UNIVERSITY OF WASHINGTON 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.
*
*/
#include <ctype.h>
#include <stdio.h>
/* VMS - The following two lines were transposed */
#include "osdep.h"
#include "mail.h"
#include "smtp.h"
#include "nntp.h"
#include "rfc822.h"
#include "misc.h"
/* Network News Transfer Protocol open connection
* Accepts: service host list
* initial debugging flag
* Returns: T on success, NIL on failure
*/
SMTPSTREAM *nntp_open (hostlist,debug)
char **hostlist;
long debug;
{
SMTPSTREAM *stream = NIL;
void *tcpstream;
if (!(hostlist && *hostlist)) mm_log ("Missing NNTP service host",ERROR);
else do { /* try to open connection */
if (tcpstream = tcp_open (*hostlist,NNTPTCPPORT)) {
stream = (SMTPSTREAM *) fs_get (sizeof (SMTPSTREAM));
stream->tcpstream = tcpstream;
stream->debug = debug;
stream->reply = NIL;
/* get NNTP greeting */
if ((smtp_reply (stream) == NNTPGREET) &&
(smtp_send (stream,"MODE","READER") == NNTPGREET)) return stream;
smtp_close (stream); /* otherwise punt stream */
}
} while (*++hostlist); /* try next server */
return NIL;
}
/* Network News Transfer Protocol deliver news
* Accepts: stream
* message envelope
* message body
* Returns: T on success, NIL on failure
*/
long nntp_mail (stream,env,body)
SMTPSTREAM *stream;
ENVELOPE *env;
BODY *body;
{
long ret;
char tmp[8*MAILTMPLEN],*s;
/* negotiate post command */
if (!(smtp_send (stream,"POST",NIL) == NNTPREADY)) return NIL;
/* set up error in case failure */
smtp_fake (stream,SMTPSOFTFATAL,"NNTP connection went away!");
/* Gabba gabba hey, we need some brain damage to send netnews!!!
*
* First, we give ourselves a frontal lobotomy, and put in some UUCP
* syntax. It doesn't matter that it's completely bogus UUCP, and
* that UUCP has nothing to do with anything we're doing.
*
* Then, we bop ourselves on the head with a ball-peen hammer. How
* dare we be so presumptious as to insert a *comment* in a Date:
* header line. Why, we were actually trying to be nice to a human
* by giving a symbolic timezone (such as PST) in addition to a
* numeric timezone (such as -0800). But the gods of news transport
* will have none of this. Unix weenies, tried and true, rule!!!
*/
/* RFC-1036 requires this cretinism */
sprintf (tmp,"Path: %s!%s\015\012",tcp_localhost (stream->tcpstream),
env->from ? env->from->mailbox : "foo");
/* here's another cretinism */
if (s = strstr (env->date," (")) *s = NIL;
/* output data, return success status */
ret = tcp_soutr (stream->tcpstream,tmp) &&
rfc822_output (tmp,env,body,smtp_soutr,stream->tcpstream) &&
(smtp_send (stream,".",NIL) == NNTPOK);
if (s) *s = ' '; /* put the comment in the date back */
return ret;
}