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- /*
- * Program: Network News Transfer Protocol (NNTP) client routines for DOS
- *
- * 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: 25 January 1993
- * Last Edited: 26 July 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>
- #include <errno.h>
- #include <fcntl.h>
- #include "mail.h"
- #include "osdep.h"
- #include <time.h>
- #include <sys\stat.h>
- #include "dawz.h"
- #undef LOCAL
- #include "smtp.h"
- #include "nntp.h"
- #include "nntpcdos.h"
- #include "rfc822.h"
- #include "misc.h"
-
- /* NNTP mail routines */
-
-
- /* Driver dispatch used by MAIL */
-
- DRIVER nntpdriver = {
- "nntp", /* driver name */
- (DRIVER *) NIL, /* next driver */
- nntp_valid, /* mailbox is valid for us */
- nntp_parameters, /* manipulate parameters */
- nntp_find, /* find mailboxes */
- nntp_find_bboards, /* find bboards */
- nntp_find_all, /* find all mailboxes */
- nntp_find_all_bboards, /* find all bboards */
- nntp_subscribe, /* subscribe to mailbox */
- nntp_unsubscribe, /* unsubscribe from mailbox */
- nntp_subscribe_bboard, /* subscribe to bboard */
- nntp_unsubscribe_bboard, /* unsubscribe from bboard */
- nntp_create, /* create mailbox */
- nntp_delete, /* delete mailbox */
- nntp_rename, /* rename mailbox */
- nntp_mopen, /* open mailbox */
- nntp_close, /* close mailbox */
- nntp_fetchfast, /* fetch message "fast" attributes */
- nntp_fetchflags, /* fetch message flags */
- nntp_fetchstructure, /* fetch message envelopes */
- nntp_fetchheader, /* fetch message header only */
- nntp_fetchtext, /* fetch message body only */
- nntp_fetchbody, /* fetch message body section */
- nntp_setflag, /* set message flag */
- nntp_clearflag, /* clear message flag */
- nntp_search, /* search for message based on criteria */
- nntp_ping, /* ping mailbox to see if still alive */
- nntp_check, /* check for new messages */
- nntp_expunge, /* expunge deleted messages */
- nntp_copy, /* copy messages to another mailbox */
- nntp_move, /* move messages to another mailbox */
- nntp_append, /* append string message to mailbox */
- nntp_gc /* garbage collect stream */
- };
-
- /* prototype stream */
- MAILSTREAM nntpproto = {&nntpdriver};
-
- /* NNTP mail validate mailbox
- * Accepts: mailbox name
- * Returns: our driver if name is valid, NIL otherwise
- */
-
- DRIVER *nntp_valid (char *name)
- {
- /* must be bboard */
- return *name == '*' ? mail_valid_net (name,&nntpdriver,NIL,NIL) : NIL;
- }
-
-
- /* News manipulate driver parameters
- * Accepts: function code
- * function-dependent value
- * Returns: function-dependent return value
- */
-
- void *nntp_parameters (long function,void *value)
- {
- fatal ("Invalid nntp_parameters function");
- return NIL;
- }
-
- /* NNTP mail find list of mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void nntp_find (MAILSTREAM *stream,char *pat)
- {
- /* Always a no-op */
- }
-
-
- /* NNTP mail find list of bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void nntp_find_bboards (MAILSTREAM *stream,char *pat)
- {
- FILE *f = NIL;
- void *s;
- char *t,*u,*bbd,*patx,tmp[MAILTMPLEN],patc[MAILTMPLEN];
- if (stream) { /* use .newsrc if a stream given */
- /* begin with a host specification? */
- if (((*pat == '{') || ((*pat == '*') && (pat[1] == '{'))) &&
- (t = strchr (pat,'}')) && *(patx = ++t)) {
- if (*pat == '*') pat++; /* yes, skip leading * (old Pine behavior) */
- strcpy (tmp,pat); /* copy host name */
- bbd = tmp + (patx - pat); /* where we write the bboards */
- }
- else { /* no host specification */
- bbd = tmp; /* no prefix */
- patx = pat; /* use entire specification */
- }
- /* check all newsgroups from .newsrc */
- while (t = nntp_read_sdb (&f)) {
- if (u = strchr (t,':')) { /* subscribed newsgroup? */
- *u = '\0'; /* tie off at end of name */
- if (pmatch (t,patx)) { /* pattern patch */
- strcpy (bbd,t); /* write newsgroup name after hostspec */
- mm_bboard (tmp);
- }
- }
- fs_give ((void **) &t); /* discard the line */
- }
- }
- /* use subscription manager if no stream */
- else while (t = sm_read (&s))
- if ((*t == '*') && pmatch (t+1,pat)) mm_bboard (t+1);
- }
-
- /* NNTP mail find list of all mailboxes
- * Accepts: mail stream
- * pattern to search
- */
-
- void nntp_find_all (MAILSTREAM *stream,char *pat)
- {
- /* Always a no-op */
- }
-
-
- /* NNTP mail find list of all bboards
- * Accepts: mail stream
- * pattern to search
- */
-
- void nntp_find_all_bboards (MAILSTREAM *stream,char *pat)
- {
- char *s,*t,*bbd,*patx,tmp[MAILTMPLEN];
- /* use .newsrc if a stream given */
- if (stream && LOCAL && LOCAL->nntpstream) {
- /* begin with a host specification? */
- if (((*pat == '{') || ((*pat == '*') && (pat[1] == '{'))) &&
- (t = strchr (pat,'}')) && *(patx = ++t)) {
- if (*pat == '*') pat++; /* yes, skip leading * (old Pine behavior) */
- strcpy (tmp,pat); /* copy host name */
- bbd = tmp + (patx - pat); /* where we write the bboards */
- }
- else { /* no host specification */
- bbd = tmp; /* no prefix */
- patx = pat; /* use entire specification */
- }
- /* ask server for all active newsgroups */
- if (!(smtp_send (LOCAL->nntpstream,"LIST","ACTIVE") == NNTPGLIST)) return;
- /* process data until we see final dot */
- while ((s = tcp_getline (LOCAL->nntpstream->tcpstream)) && *s != '.') {
- /* tie off after newsgroup name */
- if (t = strchr (s,' ')) *t = '\0';
- if (pmatch (s,patx)) { /* report to main program if have match */
- strcpy (bbd,s); /* write newsgroup name after prefix */
- mm_bboard (tmp);
- }
- fs_give ((void **) &s); /* clean up */
- }
- }
- }
-
- /* NNTP mail subscribe to mailbox
- * Accepts: mail stream
- * mailbox to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long nntp_subscribe (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for NNTP */
- }
-
-
- /* NNTP mail unsubscribe to mailbox
- * Accepts: mail stream
- * mailbox to delete from subscription list
- * Returns: T on success, NIL on failure
- */
-
- long nntp_unsubscribe (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for NNTP */
- }
-
-
- /* NNTP mail subscribe to bboard
- * Accepts: mail stream
- * bboard to add to subscription list
- * Returns: T on success, NIL on failure
- */
-
- long nntp_subscribe_bboard (MAILSTREAM *stream,char *mailbox)
- {
- char *s = strchr (mailbox,'}');
- return s ? nntp_update_sdb (s+1,":") : NIL;
- }
-
-
- /* NNTP mail unsubscribe to bboard
- * Accepts: mail stream
- * bboard to delete from subscription list
- * Returns: T on success, NIL on failure
- */
-
- long nntp_unsubscribe_bboard (MAILSTREAM *stream,char *mailbox)
- {
- char *s = strchr (mailbox,'}');
- return s ? nntp_update_sdb (s+1,"!") : NIL;
- }
-
- /* NNTP mail create mailbox
- * Accepts: mail stream
- * mailbox name to create
- * Returns: T on success, NIL on failure
- */
-
- long nntp_create (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for NNTP */
- }
-
-
- /* NNTP mail delete mailbox
- * mailbox name to delete
- * Returns: T on success, NIL on failure
- */
-
- long nntp_delete (MAILSTREAM *stream,char *mailbox)
- {
- return NIL; /* never valid for NNTP */
- }
-
-
- /* NNTP mail rename mailbox
- * Accepts: mail stream
- * old mailbox name
- * new mailbox name
- * Returns: T on success, NIL on failure
- */
-
- long nntp_rename (MAILSTREAM *stream,char *old,char *new)
- {
- return NIL; /* never valid for NNTP */
- }
-
- /* NNTP mail open
- * Accepts: stream to open
- * Returns: stream on success, NIL on failure
- */
-
- MAILSTREAM *nntp_mopen (MAILSTREAM *stream)
- {
- long i,j,k;
- long nmsgs = 0;
- long recent = 0;
- long unseen = 0;
- char c = NIL,*s,*t,tmp[MAILTMPLEN];
- NETMBX mb;
- FILE *f = NIL;
- void *tcpstream;
- SMTPSTREAM *nstream = NIL;
- /* return prototype for OP_PROTOTYPE call */
- if (!stream) return &nntpproto;
- mail_valid_net_parse (stream->mailbox,&mb);
- /* hokey default for local host */
- if (!lhostn) lhostn = cpystr ("localhost");
- if (!*mb.mailbox) strcpy (mb.mailbox,"general");
- if (LOCAL) { /* if recycle stream, see if changing hosts */
- if (strcmp (lcase (mb.host),lcase (strcpy (tmp,LOCAL->host)))) {
- sprintf (tmp,"Closing connection to %s",LOCAL->host);
- if (!stream->silent) mm_log (tmp,(long) NIL);
- }
- else { /* same host, preserve NNTP connection */
- sprintf (tmp,"Reusing connection to %s",LOCAL->host);
- if (!stream->silent) mm_log (tmp,(long) NIL);
- nstream = LOCAL->nntpstream;
- LOCAL->nntpstream = NIL;/* keep nntp_close() from punting it */
- }
- nntp_close (stream); /* do close action */
- stream->dtb = &nntpdriver;/* reattach this driver */
- mail_free_cache (stream); /* clean up cache */
- }
-
- /* open NNTP now if not already open */
- if (!nstream && (tcpstream = tcp_open (mb.host,mb.port ?
- (long) mb.port : NNTPTCPPORT))) {
- nstream = (SMTPSTREAM *) fs_get (sizeof (SMTPSTREAM));
- nstream->tcpstream = tcpstream;
- nstream->debug = stream->debug;
- nstream->reply = NIL;
- /* get NNTP greeting */
- if (smtp_reply (nstream) == NNTPGREET)
- mm_log (nstream->reply + 4,(long) NIL);
- else { /* oops */
- mm_log (nstream->reply,ERROR);
- smtp_close (nstream); /* punt stream */
- nstream = NIL;
- }
- }
- if (nstream) { /* now try to open newsgroup */
- if ((!stream->halfopen) && /* open the newsgroup if not halfopen */
- ((smtp_send (nstream,"GROUP",mb.mailbox) != NNTPGOK) ||
- ((nmsgs = strtol (nstream->reply + 4,&s,10)) < 0) ||
- ((i = strtol (s,&s,10)) < 0) || ((j = strtol (s,&s,10)) < 0))) {
- mm_log (nstream->reply,ERROR);
- smtp_close (nstream); /* punt stream */
- nstream = NIL;
- return NIL;
- }
- /* newsgroup open, instantiate local data */
- stream->local = fs_get (sizeof (NNTPLOCAL));
- LOCAL->nntpstream = nstream;
- LOCAL->dirty = NIL; /* no update to .newsrc needed yet */
- /* copy host and newsgroup name */
- LOCAL->host = cpystr (mb.host);
- LOCAL->name = cpystr (mb.mailbox);
- stream->sequence++; /* bump sequence number */
- stream->readonly = T; /* make sure higher level knows readonly */
- if (stream->halfopen) { /* no map or state for half-open */
- LOCAL->number = NIL;
- LOCAL->seen = NIL;
- }
-
- else { /* try to get list of valid numbers */
- if (smtp_send (nstream,"LISTGROUP",mb.mailbox) == NNTPGOK) {
- /* create number map */
- LOCAL->number = (unsigned long *) fs_get(nmsgs*sizeof (unsigned long));
- /* initialize c-client/NNTP map */
- for (i = 0; (i<nmsgs) && (s = tcp_getline (nstream->tcpstream)); ++i) {
- LOCAL->number[i] = atol (s);
- fs_give ((void **) &s);
- }
- /* get and flush the dot-line */
- if ((s = tcp_getline (nstream->tcpstream)) && (*s == '.'))
- fs_give ((void **) &s);
- else { /* lose */
- mm_log ("NNTP article listing protocol failure",ERROR);
- nntp_close (stream); /* do close action */
- }
- }
- else { /* a vanilla NNTP server, barf */
- /* any holes in sequence? */
- if (nmsgs != (k = (j - i) + 1)) {
- sprintf (tmp,"[HOLES] %ld non-existant message(s)",k-nmsgs);
- mm_notify (stream,tmp,(long) NIL);
- nmsgs = k; /* sure are, set new message count */
- }
- /* create number map */
- LOCAL->number = (unsigned long *) fs_get(nmsgs*sizeof (unsigned long));
- /* initialize c-client/NNTP map */
- for (k = 0; k < nmsgs; ++k) LOCAL->number[k] = i + k;
- }
- /* create state list */
- LOCAL->seen = (char *) fs_get (nmsgs * sizeof (char));
- /* initialize state */
- for (i = 0; i < nmsgs; ++i) LOCAL->seen[i] = NIL;
-
- mail_exists(stream,nmsgs);/* notify upper level about mailbox size */
- i = 0; /* nothing scanned yet */
- while (t = nntp_read_sdb (&f)) {
- if ((s = strpbrk (t,":!")) && (c = *s)) {
- *s++ = '\0'; /* tie off newsgroup name, point to data */
- if (strcmp (t,LOCAL->name)) s = NIL;
- else break; /* found it! */
- }
- fs_give ((void **) &t); /* give back this entry line */
- }
- if (s) { /* newsgroup found? */
- if (c == '!') mm_log ("Not subscribed to that newsgroup",WARN);
- while (*s && i < nmsgs){/* process until run out of messages or list */
- j = strtol (s,&s,10); /* start of possible range */
- /* other end of range */
- k = (*s == '-') ? strtol (++s,&s,10) : j;
- /* skip messages before this range */
- while ((LOCAL->number[i] < j) && (i < nmsgs)) {
- if (!unseen) unseen = i + 1;
- i++;
- }
- while ((LOCAL->number[i] >= j) && (LOCAL->number[i] <= k) &&
- (i < nmsgs)){ /* mark messages within the range as seen */
- LOCAL->seen[i++] = T;
- mail_elt (stream,i)->deleted = T;
- }
- if (*s == ',') s++; /* skip past comma */
- else if (*s) { /* better not be anything else then */
- mm_log ("Bogus syntax in news state file",ERROR);
- break; /* give up fast!! */
- }
- }
- }
- else mm_log ("No state for newsgroup found, reading as new",WARN);
- if (t) { /* need to free up cruft? */
- fs_give ((void **) &t); /* yes, give back newsrc entry */
- fclose (f); /* close the file */
- }
- while (i++ < nmsgs) { /* mark all remaining messages as new */
- mail_elt (stream,i)->recent = T;
- ++recent; /* count another recent message */
- }
- if (unseen) { /* report first unseen message */
- sprintf (tmp,"[UNSEEN] %ld is first unseen message",unseen);
- mm_notify (stream,tmp,(long) NIL);
- }
- /* notify upper level about recent */
- mail_recent(stream,recent);
- /* notify if empty bboard */
- if (!(stream->nmsgs||stream->silent)) mm_log ("Newsgroup is empty",WARN);
- }
- }
- return LOCAL ? stream : NIL; /* if stream is alive, return to caller */
- }
-
- /* NNTP mail close
- * Accepts: MAIL stream
- */
-
- void nntp_close (MAILSTREAM *stream)
- {
- if (LOCAL) { /* only if a file is open */
- nntp_check (stream); /* dump final checkpoint */
- if (LOCAL->name) fs_give ((void **) &LOCAL->name);
- if (LOCAL->host) fs_give ((void **) &LOCAL->host);
- if (LOCAL->number) fs_give ((void **) &LOCAL->number);
- if (LOCAL->seen) fs_give ((void **) &LOCAL->seen);
- /* close NNTP connection */
- if (LOCAL->nntpstream) smtp_close (LOCAL->nntpstream);
- /* nuke the local data */
- fs_give ((void **) &stream->local);
- stream->dtb = NIL; /* log out the DTB */
- }
- }
-
- /* NNTP mail fetch fast information
- * Accepts: MAIL stream
- * sequence
- */
-
- void nntp_fetchfast (MAILSTREAM *stream,char *sequence)
- {
- return; /* no-op for local mail */
- }
-
-
- /* NNTP mail fetch flags
- * Accepts: MAIL stream
- * sequence
- */
-
- void nntp_fetchflags (MAILSTREAM *stream,char *sequence)
- {
- return; /* no-op for local mail */
- }
-
- /* NNTP mail fetch envelope
- * Accepts: MAIL stream
- * message # to fetch
- * pointer to return body
- * Returns: envelope of this message, body returned in body value
- *
- * Fetches the "fast" information as well
- */
-
- #define MAXHDR (unsigned long) 4*MAILTMPLEN
-
- ENVELOPE *nntp_fetchstructure (MAILSTREAM *stream,long msgno,BODY **body)
- {
- char *h,tmp[MAXHDR];
- LONGCACHE *lelt;
- ENVELOPE **env;
- STRING bs;
- DAWZDATA d;
- BODY **b;
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- long m = msgno - 1;
- unsigned long hdrsize;
- unsigned long textsize = 0;
- if (stream->scache) { /* short cache */
- if (msgno != stream->msgno){/* flush old poop if a different message */
- mail_free_envelope (&stream->env);
- mail_free_body (&stream->body);
- }
- stream->msgno = msgno;
- env = &stream->env; /* get pointers to envelope and body */
- b = &stream->body;
- }
- else { /* long cache */
- lelt = mail_lelt (stream,msgno);
- env = &lelt->env; /* get pointers to envelope and body */
- b = &lelt->body;
- }
-
- if ((body && !*b) || !*env) { /* have the poop we need? */
- mail_free_envelope (env); /* flush old envelope and body */
- mail_free_body (b);
- sprintf (tmp,"%ld",LOCAL->number[m]);
- if (smtp_send (LOCAL->nntpstream,"HEAD",tmp) == NNTPHEAD) {
- nntp_slurp (stream,&hdrsize);
- /* limit header size */
- if (hdrsize > MAXHDR) hdrsize = MAXHDR;
- h = (char *) fs_get (hdrsize +1);
- /* read header */
- read (LOCAL->fd,h,hdrsize);
- h[hdrsize] = '\0'; /* ensure tied off */
- close (LOCAL->fd); /* clean up the file descriptor */
- }
- else { /* failed, mark as deleted */
- LOCAL->seen[m] = T;
- mail_elt (stream,msgno)->deleted = T;
- h = cpystr (""); /* no header */
- hdrsize = 0; /* empty header */
- }
- if (body) { /* get message text */
- sprintf (tmp,"%ld",LOCAL->number[m]);
- if (smtp_send (LOCAL->nntpstream,"BODY",tmp) == NNTPBODY) {
- nntp_slurp (stream,&textsize);
- d.fd = LOCAL->fd; /* set initial stringstruct */
- d.pos = 0; /* starting at beginning of file */
- INIT (&bs,dawz_string,(void *) &d,textsize);
- }
- else { /* failed, mark as deleted */
- LOCAL->seen[m] = T;
- mail_elt (stream,msgno)->deleted = T;
- body = NIL; /* failed or some reason */
- }
- }
- /* calculate message size */
- elt->rfc822_size = hdrsize + textsize;
- /* parse envelope and body */
- rfc822_parse_msg (env,body ? b : NIL,h,hdrsize,body ? &bs : NIL,
- lhostn,tmp);
- fs_give ((void **) &h); /* don't need header any more */
- /* clean up the file descriptor */
- if (body) close ((int) bs.data);
- /* parse date */
- if (*env && (*env)->date) mail_parse_date (elt,(*env)->date);
- if (!elt->month) mail_parse_date (elt,"01-JAN-1969 00:00:00 GMT");
- }
- if (body) *body = *b; /* return the body */
- return *env; /* return the envelope */
- }
-
- /* NNTP mail fetch message header
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message header in RFC822 format
- */
-
- char *nntp_fetchheader (MAILSTREAM *stream,long msgno)
- {
- char tmp[MAILTMPLEN];
- unsigned long hdrsize;
- long m = msgno - 1;
- /* set default gets routine */
- if (!mailgets) mailgets = mm_gets;
- if (stream->text) fs_give ((void **) &stream->text);
- /* get the header */
- sprintf (tmp,"%ld",LOCAL->number[m]);
- if (smtp_send (LOCAL->nntpstream,"HEAD",tmp) == NNTPHEAD) {
- nntp_slurp (stream,&hdrsize);
- /* return it to user */
- stream->text = (*mailgets) (nntp_read,stream,hdrsize);
- close (LOCAL->fd); /* clean up the file descriptor */
- }
- else { /* failed, mark as deleted */
- LOCAL->seen[m] = T;
- mail_elt (stream,msgno)->deleted = T;
- }
- return stream->text ? stream->text : "";
- }
-
-
- /* NNTP mail fetch message text (body only)
- * Accepts: MAIL stream
- * message # to fetch
- * Returns: message text in RFC822 format
- */
-
- char *nntp_fetchtext (MAILSTREAM *stream,long msgno)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- unsigned long textsize;
- long m = msgno - 1;
- char tmp[MAILTMPLEN];
- /* set default gets routine */
- if (!mailgets) mailgets = mm_gets;
- if (stream->text) fs_give ((void **) &stream->text);
- /* get the text */
- sprintf (tmp,"%ld",LOCAL->number[m]);
- if (smtp_send (LOCAL->nntpstream,"BODY",tmp) == NNTPBODY) {
- nntp_slurp (stream,&textsize);
- /* return it to user */
- stream->text = (*mailgets) (nntp_read,stream,textsize);
- close (LOCAL->fd); /* clean up the file descriptor */
- }
- else { /* failed, mark as deleted */
- LOCAL->seen[m] = T;
- mail_elt (stream,msgno)->deleted = T;
- }
- elt->seen = T; /* mark as seen */
- return stream->text ? stream->text : "";
- }
-
- /* NNTP fetch message body as a structure
- * Accepts: Mail stream
- * message # to fetch
- * section specifier
- * pointer to length
- * Returns: pointer to section of message body
- */
-
- char *nntp_fetchbody (MAILSTREAM *stream,long m,char *s,unsigned long *len)
- {
- BODY *b;
- PART *pt;
- unsigned long i;
- unsigned long offset = 0;
- unsigned long textsize;
- MESSAGECACHE *elt = mail_elt (stream,m);
- char tmp[MAILTMPLEN];
- /* set default gets routine */
- if (!mailgets) mailgets = mm_gets;
- if (stream->text) fs_give ((void **) &stream->text);
- /* make sure have a body */
- if (!(nntp_fetchstructure (stream,m,&b) && b && s && *s &&
- ((i = strtol (s,&s,10)) > 0))) return NIL;
- do { /* until find desired body part */
- /* multipart content? */
- if (b->type == TYPEMULTIPART) {
- pt = b->contents.part; /* yes, find desired part */
- while (--i && (pt = pt->next));
- if (!pt) return NIL; /* bad specifier */
- /* note new body, check valid nesting */
- if (((b = &pt->body)->type == TYPEMULTIPART) && !*s) return NIL;
- offset = pt->offset; /* get new offset */
- }
- else if (i != 1) return NIL;/* otherwise must be section 1 */
- /* need to go down further? */
- if (i = *s) switch (b->type) {
- case TYPEMESSAGE: /* embedded message, calculate new offset */
- offset = b->contents.msg.offset;
- b = b->contents.msg.body; /* get its body, drop into multipart case */
- case TYPEMULTIPART: /* multipart, get next section */
- if ((*s++ == '.') && (i = strtol (s,&s,10)) > 0) break;
- default: /* bogus subpart specification */
- return NIL;
- }
- } while (i);
-
- /* lose if body bogus */
- if ((!b) || b->type == TYPEMULTIPART) return NIL;
- /* get the text */
- sprintf (tmp,"%ld",LOCAL->number[m - 1]);
- if (smtp_send (LOCAL->nntpstream,"BODY",tmp) == NNTPBODY) {
- nntp_slurp (stream,&textsize);
- /* move to that place in the file */
- lseek (LOCAL->fd,offset,SEEK_SET);
- /* return it to user */
- stream->text = (*mailgets) (nntp_read,stream,*len = b->size.ibytes);
- close (LOCAL->fd); /* clean up the file descriptor */
- }
- else { /* failed, mark as deleted */
- mail_elt (stream,m)->deleted = T;
- LOCAL->seen[m - 1] = T;
- }
- elt->seen = T; /* mark as seen */
- return stream->text ? stream->text : "";
- }
-
-
- /* NNTP mail read
- * Accepts: MAIL stream
- * number of bytes to read
- * buffer address
- * Returns: T if success, NIL otherwise
- */
-
- long nntp_read (MAILSTREAM *stream,unsigned long count,char *buffer)
- {
- return read (LOCAL->fd,buffer,(unsigned int) count) ? T : NIL;
- }
-
- /* NNTP mail slurp NNTP dot-terminated text
- * Accepts: MAIL stream
- * pointer to size to return
- */
-
- void nntp_slurp (MAILSTREAM *stream,unsigned long *siz)
- {
- char *s,*t;
- int i,ok = T;
- char tmp[MAILTMPLEN];
- if (!((s = getenv ("TMP")) || (s = getenv ("TEMP")))) s = myhomedir ();
- if ((i = strlen (s)) && ((s[i-1] == '\\') || (s[i-1]=='/')))
- s[i-1] = '\0'; /* tie off trailing directory delimiter */
- sprintf (tmp,"%s\\%s",s,"NEWSTEXT.TMP");
- if ((LOCAL->fd = open (tmp,O_BINARY|O_RDWR|O_TRUNC|O_CREAT,S_IREAD|S_IWRITE))
- < 0) {
- sprintf (tmp,"Can't open scratch file on %s",s);
- mm_log (tmp,ERROR);
- }
- *siz = 0; /* initially no data */
- while (s = tcp_getline (LOCAL->nntpstream->tcpstream)) {
- if (*s == '.') { /* possible end of text? */
- if (s[1]) t = s + 1; /* pointer to true start of line */
- else {
- fs_give ((void **) &s); /* free the line */
- break; /* end of data */
- }
- }
- else t = s; /* want the entire line */
- if (ok && (LOCAL->fd >= 0)){/* copy it to the file */
- if ((write (LOCAL->fd,t,i = strlen (t)) >= 0) &&
- (write (LOCAL->fd,"\015\012",2) >= 0))
- *siz += i + 2; /* tally up size of data */
- else {
- sprintf (tmp,"Error writing scratch file, data trucated at %lu chars",
- *siz);
- mm_log (tmp,ERROR);
- ok = NIL; /* don't try any more */
- }
- }
- fs_give ((void **) &s); /* free the line */
- }
- if (LOCAL->fd >= 0) { /* making a file? */
- if (ok) { /* not if some problem happened */
- write (LOCAL->fd,"\015\012",2);
- *siz += 2; /* write final newline */
- }
- /* rewind to start of file */
- lseek (LOCAL->fd,(unsigned long) 0,SEEK_SET);
- }
- }
-
- /* NNTP mail set flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void nntp_setflag (MAILSTREAM *stream,char *sequence,char *flag)
- {
- MESSAGECACHE *elt;
- long i;
- short f = nntp_getflags (stream,flag);
- if (!f) return; /* no-op if no flags to modify */
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i + 1))->sequence) {
- if (f&fSEEN) elt->seen=T; /* set all requested flags */
- if (f&fDELETED) { /* deletion marks it in newsrc */
- elt->deleted = T; /* mark deleted */
- if (!LOCAL->seen[i]) LOCAL->seen[i] = LOCAL->dirty = T;
- }
- if (f&fFLAGGED) elt->flagged = T;
- if (f&fANSWERED) elt->answered = T;
- }
- }
-
-
- /* NNTP mail clear flag
- * Accepts: MAIL stream
- * sequence
- * flag(s)
- */
-
- void nntp_clearflag (MAILSTREAM *stream,char *sequence,char *flag)
- {
- MESSAGECACHE *elt;
- long i;
- short f = nntp_getflags (stream,flag);
- if (!f) return; /* no-op if no flags to modify */
- /* get sequence and loop on it */
- if (mail_sequence (stream,sequence)) for (i = 0; i < stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i + 1))->sequence) {
- /* clear all requested flags */
- if (f&fSEEN) elt->seen = NIL;
- if (f&fDELETED) {
- elt->deleted = NIL; /* undelete */
- if (LOCAL->seen[i]) { /* if marked in newsrc */
- LOCAL->seen[i] = NIL; /* unmark it now */
- LOCAL->dirty = T; /* mark stream as dirty */
- }
- }
- if (f&fFLAGGED) elt->flagged = NIL;
- if (f&fANSWERED) elt->answered = NIL;
- }
- }
-
- /* NNTP mail search for messages
- * Accepts: MAIL stream
- * search criteria
- */
-
- void nntp_search (MAILSTREAM *stream,char *criteria)
- {
- long i,n;
- char *d,tmp[MAILTMPLEN];
- search_t f;
- /* initially all searched */
- for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->searched = T;
- /* get first criterion */
- if (criteria && (criteria = strtok (criteria," "))) {
- /* for each criterion */
- for (; criteria; (criteria = strtok (NIL," "))) {
- f = NIL; d = NIL; n = 0; /* init then scan the criterion */
- switch (*ucase (criteria)) {
- case 'A': /* possible ALL, ANSWERED */
- if (!strcmp (criteria+1,"LL")) f = nntp_search_all;
- else if (!strcmp (criteria+1,"NSWERED")) f = nntp_search_answered;
- break;
- case 'B': /* possible BCC, BEFORE, BODY */
- if (!strcmp (criteria+1,"CC"))
- f = nntp_search_string (nntp_search_bcc,&d,&n);
- else if (!strcmp (criteria+1,"EFORE"))
- f = nntp_search_date (nntp_search_before,&n);
- else if (!strcmp (criteria+1,"ODY"))
- f = nntp_search_string (nntp_search_body,&d,&n);
- break;
- case 'C': /* possible CC */
- if (!strcmp (criteria+1,"C"))
- f = nntp_search_string (nntp_search_cc,&d,&n);
- break;
- case 'D': /* possible DELETED */
- if (!strcmp (criteria+1,"ELETED")) f = nntp_search_deleted;
- break;
- case 'F': /* possible FLAGGED, FROM */
- if (!strcmp (criteria+1,"LAGGED")) f = nntp_search_flagged;
- else if (!strcmp (criteria+1,"ROM"))
- f = nntp_search_string (nntp_search_from,&d,&n);
- break;
- case 'K': /* possible KEYWORD */
- if (!strcmp (criteria+1,"EYWORD"))
- f = nntp_search_flag (nntp_search_keyword,&d);
- break;
- case 'N': /* possible NEW */
- if (!strcmp (criteria+1,"EW")) f = nntp_search_new;
- break;
-
- case 'O': /* possible OLD, ON */
- if (!strcmp (criteria+1,"LD")) f = nntp_search_old;
- else if (!strcmp (criteria+1,"N"))
- f = nntp_search_date (nntp_search_on,&n);
- break;
- case 'R': /* possible RECENT */
- if (!strcmp (criteria+1,"ECENT")) f = nntp_search_recent;
- break;
- case 'S': /* possible SEEN, SINCE, SUBJECT */
- if (!strcmp (criteria+1,"EEN")) f = nntp_search_seen;
- else if (!strcmp (criteria+1,"INCE"))
- f = nntp_search_date (nntp_search_since,&n);
- else if (!strcmp (criteria+1,"UBJECT"))
- f = nntp_search_string (nntp_search_subject,&d,&n);
- break;
- case 'T': /* possible TEXT, TO */
- if (!strcmp (criteria+1,"EXT"))
- f = nntp_search_string (nntp_search_text,&d,&n);
- else if (!strcmp (criteria+1,"O"))
- f = nntp_search_string (nntp_search_to,&d,&n);
- break;
- case 'U': /* possible UN* */
- if (criteria[1] == 'N') {
- if (!strcmp (criteria+2,"ANSWERED")) f = nntp_search_unanswered;
- else if (!strcmp (criteria+2,"DELETED")) f = nntp_search_undeleted;
- else if (!strcmp (criteria+2,"FLAGGED")) f = nntp_search_unflagged;
- else if (!strcmp (criteria+2,"KEYWORD"))
- f = nntp_search_flag (nntp_search_unkeyword,&d);
- else if (!strcmp (criteria+2,"SEEN")) f = nntp_search_unseen;
- }
- break;
- default: /* we will barf below */
- break;
- }
- if (!f) { /* if can't determine any criteria */
- sprintf (tmp,"Unknown search criterion: %.80s",criteria);
- mm_log (tmp,ERROR);
- return;
- }
- /* run the search criterion */
- for (i = 1; i <= stream->nmsgs; ++i)
- if (mail_elt (stream,i)->searched && !(*f) (stream,i,d,n))
- mail_elt (stream,i)->searched = NIL;
- }
- /* report search results to main program */
- for (i = 1; i <= stream->nmsgs; ++i)
- if (mail_elt (stream,i)->searched) mail_searched (stream,i);
- }
- }
-
- /* NNTP mail ping mailbox
- * Accepts: MAIL stream
- * Returns: T if stream alive, else NIL
- */
-
- long nntp_ping (MAILSTREAM *stream)
- {
- /* Kludge alert: SMTPSOFTFATAL is 421 which is used in NNTP to mean ``No
- * next article in this group''. Hopefully, no NNTP server will choke on
- * a bogus command. */
- return (smtp_send (LOCAL->nntpstream,"PING","PONG") != SMTPSOFTFATAL);
- }
-
-
- /* NNTP mail check mailbox
- * Accepts: MAIL stream
- */
-
- void nntp_check (MAILSTREAM *stream)
- {
- unsigned long i,j,k;
- char *s,tmp[MAILTMPLEN];
- if (!LOCAL->dirty) return; /* never do if no updates */
- *(s = tmp) = '\0'; /* initialize list */
- for (i = 0,j = 1,k = 0; i < stream->nmsgs; ++i) {
- if (LOCAL->seen[i]) { /* seen message? */
- k = LOCAL->number[i]; /* this is the top of the current range */
- if (j == 0) j = k; /* if no range in progress, start one */
- }
- else if (j != 0) { /* unread message, ending a range */
- /* calculate end of range */
- if (k = LOCAL->number[i] - 1) {
- /* dump range */
- sprintf (s,(j == k) ? "%ld," : "%ld-%ld,",j,k);
- s += strlen (s); /* find end of string */
- }
- j = 0; /* no more range in progress */
- }
- }
- if (j) { /* dump trailing range */
- sprintf (s,(j == k) ? "%ld" : "%ld-%ld",j,k);
- s += strlen (s); /* find end of string */
- }
- else if (s[-1] == ',') s--; /* prepare to patch out any trailing comma */
- *s++ = '\0'; /* tie off string */
- nntp_update_sdb (LOCAL->name,tmp);
- }
-
- /* NNTP mail expunge mailbox
- * Accepts: MAIL stream
- */
-
- void nntp_expunge (MAILSTREAM *stream)
- {
- if (!stream->silent)
- mm_log ("Expunge ignored on readonly mailbox",(long) NIL);
- }
-
-
- /* NNTP mail copy message(s)
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if copy successful, else NIL
- */
-
- long nntp_copy (MAILSTREAM *stream,char *sequence,char *mailbox)
- {
- char *s,tmp[MAILTMPLEN];
- struct stat sbuf;
- MESSAGECACHE *elt;
- time_t ti;
- struct tm *t;
- int i,j;
- unsigned long textsize;
- int fd = open (dawz_file (tmp,mailbox),O_BINARY|O_WRONLY|O_APPEND|O_CREAT,
- S_IREAD|S_IWRITE);
- if (fd < 0) { /* got file? */
- sprintf (tmp,"Unable to open copy mailbox: %s",strerror (errno));
- mm_log (tmp,ERROR);
- return NIL;
- }
- tzset (); /* initialize timezone stuff */
- mm_critical (stream); /* go critical */
- fstat (fd,&sbuf); /* get current file size */
-
- /* for each requested message */
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,(long) i))->sequence) {
- sprintf (tmp,"%ld",LOCAL->number[i - 1]);
- if (smtp_send (LOCAL->nntpstream,"ARTICLE",tmp) == NNTPHEAD) {
- nntp_slurp (stream,&textsize);
- mail_date (tmp,elt); /* make a header */
- ti = time (0); /* get time now */
- t = localtime (&ti); /* output local time */
- sprintf (tmp,"%d-%s-%d %02d:%02d:%02d-%s,%ld;000000000000\015\012",
- t->tm_mday,months[t->tm_mon],t->tm_year+1900,
- t->tm_hour,t->tm_min,t->tm_sec,tzname[t->tm_isdst],
- textsize);
- while (textsize) { /* write out the message, chunk at a time */
- read (LOCAL->fd,tmp,j = min (textsize,(long) MAILTMPLEN));
- if (write (fd,tmp,j) < 0) {
- sprintf (tmp,"Unable to write message: %s",strerror (errno));
- mm_log (tmp,ERROR);
- close (LOCAL->fd);
- chsize (fd,sbuf.st_size);
- close (fd); /* punt */
- mm_nocritical (stream);
- return NIL;
- }
- textsize -= i; /* note we wrote out this much */
- }
- close (LOCAL->fd); /* clean up the file descriptor */
- }
- else { /* failed, mark as deleted */
- LOCAL->seen[i - 1] = T;
- elt->deleted = T;
- }
- }
- close (fd); /* close the file */
- mm_nocritical (stream); /* release critical */
- return T;
- }
-
- /* NNTP mail move message(s)
- * Accepts: MAIL stream
- * sequence
- * destination mailbox
- * Returns: T if move successful, else NIL
- */
-
- long nntp_move (MAILSTREAM *stream,char *sequence,char *mailbox)
- {
- long i;
- MESSAGECACHE *elt;
- if (!(mail_sequence (stream,sequence) &&
- nntp_copy (stream,sequence,mailbox))) return NIL;
- /* delete all requested messages */
- for (i = 1; i <= stream->nmsgs; i++)
- if ((elt = mail_elt (stream,i))->sequence) {
- elt->deleted = T; /* mark message deleted */
- LOCAL->dirty = T; /* mark mailbox as dirty */
- LOCAL->seen[i - 1] = T; /* and seen for .newsrc update */
- }
- return T;
- }
-
-
- /* NNTP mail append message from stringstruct
- * Accepts: MAIL stream
- * destination mailbox
- * stringstruct of messages to append
- * Returns: T if append successful, else NIL
- */
-
- long nntp_append (MAILSTREAM *stream,char *mailbox,STRING *message)
- {
- mm_log ("Append not valid for NNTP",ERROR);
- return NIL;
- }
-
-
- /* NNTP garbage collect stream
- * Accepts: Mail stream
- * garbage collection flags
- */
-
- void nntp_gc (MAILSTREAM *stream,long gcflags)
- {
- /* nothing for now */
- }
-
- /* Internal routines */
-
-
- /* Read NNTP database
- * Accepts: pointer to subscription database file handle (NIL if first time)
- * Returns: line from the file
- */
-
- char *nntp_read_sdb (FILE **f)
- {
- int i;
- char *s,*t,tmp[MAILTMPLEN];
- if (!*f) { /* first time through? */
- NEWSRC (tmp); /* yes, make name of newsrc file and open */
- if (!(*f = fopen (tmp,"r"))) return NIL;
- }
- /* read a line from the file */
- if (fgets (tmp,MAILTMPLEN,*f)) {
- i = strlen (tmp); /* how many characters we got */
- if (tmp[i - 1] == '\n') { /* got a complete line? */
- tmp[i - 1] = '\0'; /* yes, tie off the line */
- s = cpystr (tmp); /* make return string */
- }
- else { /* ugh, have to build from fragments */
- t = nntp_read_sdb (f); /* recuse to get remainder */
- sprintf (s = (char *) fs_get (i + strlen (t) + 1),"%s%s",tmp,t);
- fs_give ((void **) &t); /* discard fragment */
- }
- return s; /* return the string we made */
- }
- fclose (*f); /* end of file, close file */
- *f = NIL; /* make sure caller knows */
- return NIL; /* all done */
- }
-
- /* Update NNTP database
- * Accepts: newsgroup name
- * message data
- * Returns: T if success, NIL if failure
- */
-
- long nntp_update_sdb (char *name,char *data)
- {
- int i = strlen (name);
- char c,*s,tmp[MAILTMPLEN],new[MAILTMPLEN];
- FILE *f = NIL,*of,*nf;
- OLDNEWSRC (tmp); /* make name of old newsrc file */
- if (!(of = fopen (tmp,"w"))) {/* open old newsrc */
- mm_log ("Can't create backup of news state",ERROR);
- return NIL;
- }
- NEWNEWSRC (new); /* make name of new newsrc file */
- if (!(nf = fopen (new,"w"))) {/* open new newsrc */
- mm_log ("Can't create new news state",ERROR);
- fclose (of);
- return NIL;
- }
- /* process .newsrc file */
- while (s = nntp_read_sdb (&f)) {
- fprintf (of,"%s\n",s); /* write to backup file */
- if ((!strncmp (s,name,i)) && (((c = s[i]) == ':') || (c == '!'))) {
- if (data) switch (*data) {/* first time we saw this entry... */
- case ':': /* subscription request */
- if (c == '!') c = ':'; /* subscribe if unsubscribed */
- else { /* complain if already subscribed */
- sprintf (tmp,"Already subscribed to newsgroup %s",name);
- mm_log (tmp,ERROR);
- }
- data = s + i; /* preserve old read state */
- break;
- case '!': /* unsubscription request? */
- if (c == ':') c = '!'; /* unsubscribe if subscribed */
- else { /* complain if not subscribed */
- sprintf (tmp,"Not subscribed to newsgroup %s",name);
- mm_log (tmp,ERROR);
- }
- data = s + i; /* preserve old read state */
- break;
- default: /* update read state */
- break;
- }
- /* write the new entry */
- fprintf (nf,"%s%c %s\n",name,c,data);
- data = NIL; /* request satisfied */
- }
- else fprintf (nf,"%s\n",s); /* not the entry we want, write to new file */
- fs_give ((void **) &s);
- }
-
- if (data) switch (*data) { /* if didn't find it, make new entry */
- case ':': /* subscription request */
- fprintf (nf,"%s: \n",name);
- break;
- case '!': /* unsubscription request? */
- sprintf (tmp,"Not subscribed to newsgroup %s",name);
- mm_log (tmp,ERROR);
- break;
- default: /* update read state */
- fprintf (nf,"%s: %s\n",name,data);
- break;
- }
- fclose (nf); /* close new file */
- fclose (of); /* close backup file */
- NEWSRC (tmp); /* make name of current file */
- unlink (tmp); /* remove the current file */
- if (rename (new,tmp)) { /* rename new database to current */
- mm_log ("Can't update news state",ERROR);
- return NIL;
- }
- return LONGT; /* return success */
- }
-
-
- /* Parse flag list
- * Accepts: MAIL stream
- * flag list as a character string
- * Returns: flag command list
- */
-
- short nntp_getflags (MAILSTREAM *stream,char *flag)
- {
- char tmp[MAILTMPLEN];
- char *t;
- short f = 0;
- short i,j;
- if (flag && *flag) { /* no-op if no flag string */
- /* check if a list and make sure valid */
- if ((i = (*flag == '(')) ^ (flag[strlen (flag)-1] == ')')) {
- mm_log ("Bad flag list",ERROR);
- return NIL;
- }
- /* copy the flag string w/o list construct */
- strncpy (tmp,flag+i,(j = strlen (flag) - (2*i)));
- tmp[j] = '\0';
- t = ucase (tmp); /* uppercase only from now on */
-
- while (*t) { /* parse the flags */
- if (*t == '\\') { /* system flag? */
- switch (*++t) { /* dispatch based on first character */
- case 'S': /* possible \Seen flag */
- if (t[1] == 'E' && t[2] == 'E' && t[3] == 'N') i = fSEEN;
- t += 4; /* skip past flag name */
- break;
- case 'D': /* possible \Deleted flag */
- if (t[1] == 'E' && t[2] == 'L' && t[3] == 'E' && t[4] == 'T' &&
- t[5] == 'E' && t[6] == 'D') i = fDELETED;
- t += 7; /* skip past flag name */
- break;
- case 'F': /* possible \Flagged flag */
- if (t[1] == 'L' && t[2] == 'A' && t[3] == 'G' && t[4] == 'G' &&
- t[5] == 'E' && t[6] == 'D') i = fFLAGGED;
- t += 7; /* skip past flag name */
- break;
- case 'A': /* possible \Answered flag */
- if (t[1] == 'N' && t[2] == 'S' && t[3] == 'W' && t[4] == 'E' &&
- t[5] == 'R' && t[6] == 'E' && t[7] == 'D') i = fANSWERED;
- t += 8; /* skip past flag name */
- break;
- default: /* unknown */
- i = 0;
- break;
- }
- /* add flag to flags list */
- if (i && ((*t == '\0') || (*t++ == ' '))) f |= i;
- else { /* bitch about bogus flag */
- mm_log ("Unknown system flag",ERROR);
- return NIL;
- }
- }
- else { /* no user flags yet */
- mm_log ("Unknown flag",ERROR);
- return NIL;
- }
- }
- }
- return f;
- }
-
- /* Search support routines
- * Accepts: MAIL stream
- * message number
- * pointer to additional data
- * pointer to temporary buffer
- * Returns: T if search matches, else NIL
- */
-
- char nntp_search_all (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return T; /* ALL always succeeds */
- }
-
-
- char nntp_search_answered (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->answered ? T : NIL;
- }
-
-
- char nntp_search_deleted (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->deleted ? T : NIL;
- }
-
-
- char nntp_search_flagged (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->flagged ? T : NIL;
- }
-
-
- char nntp_search_keyword (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return NIL; /* keywords not supported yet */
- }
-
-
- char nntp_search_new (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- return (elt->recent && !elt->seen) ? T : NIL;
- }
-
- char nntp_search_old (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->recent ? NIL : T;
- }
-
-
- char nntp_search_recent (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->recent ? T : NIL;
- }
-
-
- char nntp_search_seen (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->seen ? T : NIL;
- }
-
-
- char nntp_search_unanswered (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->answered ? NIL : T;
- }
-
-
- char nntp_search_undeleted (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->deleted ? NIL : T;
- }
-
-
- char nntp_search_unflagged (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->flagged ? NIL : T;
- }
-
-
- char nntp_search_unkeyword (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return T; /* keywords not supported yet */
- }
-
-
- char nntp_search_unseen (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return mail_elt (stream,msgno)->seen ? NIL : T;
- }
-
- char nntp_search_before (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return (char) (nntp_msgdate (stream,msgno) < n);
- }
-
-
- char nntp_search_on (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return (char) (nntp_msgdate (stream,msgno) == n);
- }
-
-
- char nntp_search_since (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- /* everybody interprets "since" as .GE. */
- return (char) (nntp_msgdate (stream,msgno) >= n);
- }
-
-
- unsigned long nntp_msgdate (MAILSTREAM *stream,long msgno)
- {
- MESSAGECACHE *elt = mail_elt (stream,msgno);
- /* get date if don't have it yet */
- if (!elt->day) nntp_fetchstructure (stream,msgno,NIL);
- return (long) (elt->year << 9) + (elt->month << 5) + elt->day;
- }
-
-
- char nntp_search_body (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return NIL; /* need code here */
- }
-
-
- char nntp_search_subject (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char *t = nntp_fetchstructure (stream,msgno,NIL)->subject;
- return t ? search (t,(unsigned long) strlen (t),d,n) : NIL;
- }
-
-
- char nntp_search_text (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- return NIL; /* need code here */
- }
-
- char nntp_search_bcc (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char tmp[8*MAILTMPLEN];
- tmp[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (tmp,nntp_fetchstructure(stream,msgno,NIL)->bcc);
- return search (tmp,(unsigned long) strlen (tmp),d,n);
- }
-
-
- char nntp_search_cc (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char tmp[8*MAILTMPLEN];
- tmp[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (tmp,nntp_fetchstructure (stream,msgno,NIL)->cc);
- return search (tmp,(unsigned long) strlen (tmp),d,n);
- }
-
-
- char nntp_search_from (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char tmp[8*MAILTMPLEN];
- tmp[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (tmp,nntp_fetchstructure (stream,msgno,NIL)->from);
- return search (tmp,(unsigned long) strlen (tmp),d,n);
- }
-
-
- char nntp_search_to (MAILSTREAM *stream,long msgno,char *d,long n)
- {
- char tmp[8*MAILTMPLEN];
- tmp[0] = '\0'; /* initially empty string */
- /* get text for address */
- rfc822_write_address (tmp,nntp_fetchstructure (stream,msgno,NIL)->to);
- return search (tmp,(unsigned long) strlen (tmp),d,n);
- }
-
- /* Search parsers */
-
-
- /* Parse a date
- * Accepts: function to return
- * pointer to date integer to return
- * Returns: function to return
- */
-
- search_t nntp_search_date (search_t f,long *n)
- {
- long i;
- char *s;
- MESSAGECACHE elt;
- /* parse the date and return fn if OK */
- return (nntp_search_string (f,&s,&i) && mail_parse_date (&elt,s) &&
- (*n = (elt.year << 9) + (elt.month << 5) + elt.day)) ? f : NIL;
- }
-
- /* Parse a flag
- * Accepts: function to return
- * pointer to string to return
- * Returns: function to return
- */
-
- search_t nntp_search_flag (search_t f,char **d)
- {
- /* get a keyword, return if OK */
- return (*d = strtok (NIL," ")) ? f : NIL;
- }
-
-
- /* Parse a string
- * Accepts: function to return
- * pointer to string to return
- * pointer to string length to return
- * Returns: function to return
- */
-
- search_t nntp_search_string (search_t f,char **d,long *n)
- {
- char *c = strtok (NIL,""); /* remainder of criteria */
- if (c) { /* better be an argument */
- switch (*c) { /* see what the argument is */
- case '\0': /* catch bogons */
- case ' ':
- return NIL;
- case '"': /* quoted string */
- if (!(strchr (c+1,'"') && (*d = strtok (c,"\"")) && (*n = strlen (*d))))
- return NIL;
- break;
- case '{': /* literal string */
- *n = strtol (c+1,&c,10); /* get its length */
- if (*c++ != '}' || *c++ != '\015' || *c++ != '\012' ||
- *n > strlen (*d = c)) return NIL;
- c[*n] = '\255'; /* write new delimiter */
- strtok (c,"\255"); /* reset the strtok mechanism */
- break;
- default: /* atomic string */
- *n = strlen (*d = strtok (c," "));
- break;
- }
- return f;
- }
- else return NIL;
- }
-