--- /dev/null
+/* ========================================================================
+ * Copyright 1988-2007 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: 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: 6 September 2007
+ */
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include "c-client.h"
+#include "newsrc.h"
+#include "netmsg.h"
+#include "flstring.h"
+\f
+/* Constants */
+
+#define NNTPSSLPORT (long) 563 /* assigned SSL TCP contact port */
+#define NNTPGREET (long) 200 /* NNTP successful greeting */
+ /* NNTP successful greeting w/o posting priv */
+#define NNTPGREETNOPOST (long) 201
+#define NNTPEXTOK (long) 202 /* NNTP extensions OK */
+#define NNTPGOK (long) 211 /* NNTP group selection OK */
+#define NNTPGLIST (long) 215 /* NNTP group list being returned */
+#define NNTPARTICLE (long) 220 /* NNTP article file */
+#define NNTPHEAD (long) 221 /* NNTP header text */
+#define NNTPBODY (long) 222 /* NNTP body text */
+#define NNTPOVER (long) 224 /* NNTP overview text */
+#define NNTPOK (long) 240 /* NNTP OK code */
+#define NNTPAUTHED (long) 281 /* NNTP successful authentication */
+ /* NNTP successful authentication with data */
+#define NNTPAUTHEDDATA (long) 282
+#define NNTPREADY (long) 340 /* NNTP ready for data */
+#define NNTPWANTAUTH2 (long) 380/* NNTP authentication needed (old) */
+#define NNTPWANTPASS (long) 381 /* NNTP password needed */
+#define NNTPTLSSTART (long) 382 /* NNTP continue with TLS negotiation */
+#define NNTPCHALLENGE (long) 383/* NNTP challenge, want response */
+#define NNTPSOFTFATAL (long) 400/* NNTP soft fatal code */
+#define NNTPWANTAUTH (long) 480 /* NNTP authentication needed */
+#define NNTPBADCMD (long) 500 /* NNTP unrecognized command */
+#define IDLETIMEOUT (long) 3 /* defined in NNTPEXT WG base draft */
+
+
+/* NNTP I/O stream local data */
+
+typedef struct nntp_local {
+ SENDSTREAM *nntpstream; /* NNTP stream for I/O */
+ unsigned int dirty : 1; /* disk copy of .newsrc needs updating */
+ unsigned int tlsflag : 1; /* TLS session */
+ unsigned int tlssslv23 : 1; /* TLS using SSLv23 client method */
+ unsigned int notlsflag : 1; /* TLS not used in session */
+ unsigned int sslflag : 1; /* SSL session */
+ unsigned int novalidate : 1; /* certificate not validated */
+ unsigned int xover : 1; /* supports XOVER */
+ unsigned int xhdr : 1; /* supports XHDR */
+ char *name; /* remote newsgroup name */
+ char *user; /* mailbox user */
+ char *newsrc; /* newsrc file */
+ char *over_fmt; /* overview format */
+ unsigned long msgno; /* current text message number */
+ FILE *txt; /* current text */
+ unsigned long txtsize; /* current text size */
+} NNTPLOCAL;
+
+
+/* Convenient access to local data */
+
+#define LOCAL ((NNTPLOCAL *) stream->local)
+
+
+/* Convenient access to protocol-specific data */
+
+#define NNTP stream->protocol.nntp
+
+
+/* Convenient access to extensions */
+
+#define EXTENSION LOCAL->nntpstream->protocol.nntp.ext
+\f
+/* Function prototypes */
+
+DRIVER *nntp_valid (char *name);
+DRIVER *nntp_isvalid (char *name,char *mbx);
+void *nntp_parameters (long function,void *value);
+void nntp_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
+void nntp_list (MAILSTREAM *stream,char *ref,char *pat);
+void nntp_lsub (MAILSTREAM *stream,char *ref,char *pat);
+long nntp_canonicalize (char *ref,char *pat,char *pattern,char *wildmat);
+long nntp_subscribe (MAILSTREAM *stream,char *mailbox);
+long nntp_unsubscribe (MAILSTREAM *stream,char *mailbox);
+long nntp_create (MAILSTREAM *stream,char *mailbox);
+long nntp_delete (MAILSTREAM *stream,char *mailbox);
+long nntp_rename (MAILSTREAM *stream,char *old,char *newname);
+long nntp_status (MAILSTREAM *stream,char *mbx,long flags);
+long nntp_getmap (MAILSTREAM *stream,char *name,
+ unsigned long first,unsigned long last,
+ unsigned long rnmsgs,unsigned long nmsgs,char *tmp);
+MAILSTREAM *nntp_mopen (MAILSTREAM *stream);
+void nntp_mclose (MAILSTREAM *stream,long options);
+void nntp_fetchfast (MAILSTREAM *stream,char *sequence,long flags);
+void nntp_flags (MAILSTREAM *stream,char *sequence,long flags);
+long nntp_overview (MAILSTREAM *stream,overview_t ofn);
+long nntp_parse_overview (OVERVIEW *ov,char *text,MESSAGECACHE *elt);
+long nntp_over (MAILSTREAM *stream,char *sequence);
+char *nntp_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *size,
+ long flags);
+long nntp_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
+FILE *nntp_article (MAILSTREAM *stream,char *msgid,unsigned long *size,
+ unsigned long *hsiz);
+void nntp_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
+long nntp_search (MAILSTREAM *stream,char *charset,SEARCHPGM *pgm,long flags);
+long nntp_search_msg (MAILSTREAM *stream,unsigned long msgno,SEARCHPGM *pgm,
+ OVERVIEW *ov);
+unsigned long *nntp_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
+ SORTPGM *pgm,long flags);
+SORTCACHE **nntp_sort_loadcache (MAILSTREAM *stream,SORTPGM *pgm,
+ unsigned long start,unsigned long last,
+ long flags);
+THREADNODE *nntp_thread (MAILSTREAM *stream,char *type,char *charset,
+ SEARCHPGM *spg,long flags);
+long nntp_ping (MAILSTREAM *stream);
+void nntp_check (MAILSTREAM *stream);
+long nntp_expunge (MAILSTREAM *stream,char *sequence,long options);
+long nntp_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
+long nntp_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);
+
+long nntp_extensions (SENDSTREAM *stream,long flags);
+long nntp_send (SENDSTREAM *stream,char *command,char *args);
+long nntp_send_work (SENDSTREAM *stream,char *command,char *args);
+long nntp_send_auth (SENDSTREAM *stream,long flags);
+long nntp_send_auth_work (SENDSTREAM *stream,NETMBX *mb,char *pwd,long flags);
+void *nntp_challenge (void *s,unsigned long *len);
+long nntp_response (void *s,char *response,unsigned long size);
+long nntp_reply (SENDSTREAM *stream);
+long nntp_fake (SENDSTREAM *stream,char *text);
+long nntp_soutr (void *stream,char *s);
+\f
+/* Driver dispatch used by MAIL */
+
+DRIVER nntpdriver = {
+ "nntp", /* driver name */
+ /* driver flags */
+#ifdef INADEQUATE_MEMORY
+ DR_LOWMEM |
+#endif
+ DR_NEWS|DR_READONLY|DR_NOFAST|DR_NAMESPACE|DR_CRLF|DR_RECYCLE|DR_XPOINT |
+ DR_NOINTDATE|DR_NONEWMAIL|DR_HALFOPEN,
+ (DRIVER *) NIL, /* next driver */
+ nntp_valid, /* mailbox is valid for us */
+ nntp_parameters, /* manipulate parameters */
+ nntp_scan, /* scan mailboxes */
+ nntp_list, /* find mailboxes */
+ nntp_lsub, /* find subscribed mailboxes */
+ nntp_subscribe, /* subscribe to mailbox */
+ nntp_unsubscribe, /* unsubscribe from mailbox */
+ nntp_create, /* create mailbox */
+ nntp_delete, /* delete mailbox */
+ nntp_rename, /* rename mailbox */
+ nntp_status, /* status of mailbox */
+ nntp_mopen, /* open mailbox */
+ nntp_mclose, /* close mailbox */
+ nntp_fetchfast, /* fetch message "fast" attributes */
+ nntp_flags, /* fetch message flags */
+ nntp_overview, /* fetch overview */
+ NIL, /* fetch message structure */
+ nntp_header, /* fetch message header */
+ nntp_text, /* fetch message text */
+ NIL, /* fetch message */
+ NIL, /* unique identifier */
+ NIL, /* message number from UID */
+ NIL, /* modify flags */
+ nntp_flagmsg, /* per-message modify flags */
+ nntp_search, /* search for message based on criteria */
+ nntp_sort, /* sort messages */
+ nntp_thread, /* thread messages */
+ 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_append, /* append string message to mailbox */
+ NIL /* garbage collect stream */
+};
+
+ /* prototype stream */
+MAILSTREAM nntpproto = {&nntpdriver};
+
+
+ /* driver parameters */
+static unsigned long nntp_maxlogintrials = MAXLOGINTRIALS;
+static long nntp_port = 0;
+static long nntp_sslport = 0;
+static unsigned long nntp_range = 0;
+static long nntp_hidepath = 0;
+\f
+/* NNTP validate mailbox
+ * Accepts: mailbox name
+ * Returns: our driver if name is valid, NIL otherwise
+ */
+
+DRIVER *nntp_valid (char *name)
+{
+ char tmp[MAILTMPLEN];
+ return nntp_isvalid (name,tmp);
+}
+
+
+/* NNTP validate mailbox work routine
+ * Accepts: mailbox name
+ * buffer for returned mailbox name
+ * Returns: our driver if name is valid, NIL otherwise
+ */
+
+DRIVER *nntp_isvalid (char *name,char *mbx)
+{
+ NETMBX mb;
+ if (!mail_valid_net_parse (name,&mb) || strcmp (mb.service,nntpdriver.name)||
+ mb.anoflag) return NIL;
+ if (mb.mailbox[0] != '#') strcpy (mbx,mb.mailbox);
+ /* namespace format name */
+ else if ((mb.mailbox[1] == 'n') && (mb.mailbox[2] == 'e') &&
+ (mb.mailbox[3] == 'w') && (mb.mailbox[4] == 's') &&
+ (mb.mailbox[5] == '.')) strcpy (mbx,mb.mailbox+6);
+ else return NIL; /* bogus name */
+ return &nntpdriver;
+}
+\f
+/* News manipulate driver parameters
+ * Accepts: function code
+ * function-dependent value
+ * Returns: function-dependent return value
+ */
+
+void *nntp_parameters (long function,void *value)
+{
+ switch ((int) function) {
+ case SET_MAXLOGINTRIALS:
+ nntp_maxlogintrials = (unsigned long) value;
+ break;
+ case GET_MAXLOGINTRIALS:
+ value = (void *) nntp_maxlogintrials;
+ break;
+ case SET_NNTPPORT:
+ nntp_port = (long) value;
+ break;
+ case GET_NNTPPORT:
+ value = (void *) nntp_port;
+ break;
+ case SET_SSLNNTPPORT:
+ nntp_sslport = (long) value;
+ break;
+ case GET_SSLNNTPPORT:
+ value = (void *) nntp_sslport;
+ break;
+ case SET_NNTPRANGE:
+ nntp_range = (unsigned long) value;
+ break;
+ case GET_NNTPRANGE:
+ value = (void *) nntp_range;
+ break;
+ case SET_NNTPHIDEPATH:
+ nntp_hidepath = (long) value;
+ break;
+ case GET_NNTPHIDEPATH:
+ value = (void *) nntp_hidepath;
+ break;
+ case GET_NEWSRC:
+ if (value)
+ value = (void *) ((NNTPLOCAL *) ((MAILSTREAM *) value)->local)->newsrc;
+ break;
+ case GET_IDLETIMEOUT:
+ value = (void *) IDLETIMEOUT;
+ break;
+ case ENABLE_DEBUG:
+ if (value)
+ ((NNTPLOCAL *) ((MAILSTREAM *) value)->local)->nntpstream->debug = T;
+ break;
+ case DISABLE_DEBUG:
+ if (value)
+ ((NNTPLOCAL *) ((MAILSTREAM *) value)->local)->nntpstream->debug = NIL;
+ break;
+ default:
+ value = NIL; /* error case */
+ break;
+ }
+ return value;
+}
+\f
+/* NNTP mail scan mailboxes for string
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ * string to scan
+ */
+
+void nntp_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
+{
+ char tmp[MAILTMPLEN];
+ if (nntp_canonicalize (ref,pat,tmp,NIL))
+ mm_log ("Scan not valid for NNTP mailboxes",ERROR);
+}
+
+
+/* NNTP list newsgroups
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void nntp_list (MAILSTREAM *stream,char *ref,char *pat)
+{
+ MAILSTREAM *st = stream;
+ char *s,*t,*lcl,pattern[MAILTMPLEN],name[MAILTMPLEN],wildmat[MAILTMPLEN];
+ int showuppers = pat[strlen (pat) - 1] == '%';
+ if (!*pat) {
+ if (nntp_canonicalize (ref,"*",pattern,NIL)) {
+ /* tie off name at root */
+ if ((s = strchr (pattern,'}')) && (s = strchr (s+1,'.'))) *++s = '\0';
+ else pattern[0] = '\0';
+ mm_list (stream,'.',pattern,NIL);
+ }
+ }
+ /* ask server for open newsgroups */
+ else if (nntp_canonicalize (ref,pat,pattern,wildmat) &&
+ ((stream && LOCAL && LOCAL->nntpstream) ||
+ (stream = mail_open (NIL,pattern,OP_HALFOPEN|OP_SILENT))) &&
+ ((nntp_send (LOCAL->nntpstream,"LIST ACTIVE",
+ wildmat[0] ? wildmat : NIL) == NNTPGLIST) ||
+ (nntp_send (LOCAL->nntpstream,"LIST",NIL) == NNTPGLIST))) {
+ /* namespace format name? */
+ if (*(lcl = strchr (strcpy (name,pattern),'}') + 1) == '#') lcl += 6;
+ /* process data until we see final dot */
+ while (s = net_getline (LOCAL->nntpstream->netstream)) {
+ if ((*s == '.') && !s[1]){/* end of text */
+ fs_give ((void **) &s);
+ break;
+ }
+ if (t = strchr (s,' ')) { /* tie off after newsgroup name */
+ *t = '\0';
+ strcpy (lcl,s); /* make full form of name */
+ /* report if match */
+ if (pmatch_full (name,pattern,'.')) mm_list (stream,'.',name,NIL);
+ else while (showuppers && (t = strrchr (lcl,'.'))) {
+ *t = '\0'; /* tie off the name */
+ if (pmatch_full (name,pattern,'.'))
+ mm_list (stream,'.',name,LATT_NOSELECT);
+ }
+ }
+ fs_give ((void **) &s); /* clean up */
+ }
+ if (stream != st) mail_close (stream);
+ }
+}
+\f
+/* NNTP list subscribed newsgroups
+ * Accepts: mail stream
+ * reference
+ * pattern to search
+ */
+
+void nntp_lsub (MAILSTREAM *stream,char *ref,char *pat)
+{
+ void *sdb = NIL;
+ char *s,mbx[MAILTMPLEN];
+ /* return data from newsrc */
+ if (nntp_canonicalize (ref,pat,mbx,NIL)) newsrc_lsub (stream,mbx);
+ if (*pat == '{') { /* if remote pattern, must be NNTP */
+ if (!nntp_valid (pat)) return;
+ ref = NIL; /* good NNTP pattern, punt reference */
+ }
+ /* if remote reference, must be valid NNTP */
+ if (ref && (*ref == '{') && !nntp_valid (ref)) return;
+ /* kludgy application of reference */
+ if (ref && *ref) sprintf (mbx,"%s%s",ref,pat);
+ else strcpy (mbx,pat);
+
+ if (s = sm_read (&sdb)) do if (nntp_valid (s) && pmatch (s,mbx))
+ mm_lsub (stream,NIL,s,NIL);
+ while (s = sm_read (&sdb)); /* until no more subscriptions */
+}
+\f
+/* NNTP canonicalize newsgroup name
+ * Accepts: reference
+ * pattern
+ * returned single pattern
+ * returned wildmat pattern
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_canonicalize (char *ref,char *pat,char *pattern,char *wildmat)
+{
+ char *s;
+ DRIVER *ret;
+ if (ref && *ref) { /* have a reference */
+ if (!nntp_valid (ref)) return NIL;
+ strcpy (pattern,ref); /* copy reference to pattern */
+ /* # overrides mailbox field in reference */
+ if (*pat == '#') strcpy (strchr (pattern,'}') + 1,pat);
+ /* pattern starts, reference ends, with . */
+ else if ((*pat == '.') && (pattern[strlen (pattern) - 1] == '.'))
+ strcat (pattern,pat + 1); /* append, omitting one of the period */
+ else strcat (pattern,pat); /* anything else is just appended */
+ }
+ else strcpy (pattern,pat); /* just have basic name */
+ if ((ret = wildmat ? /* if valid and wildmat */
+ nntp_isvalid (pattern,wildmat) : nntp_valid (pattern)) && wildmat) {
+ /* don't return wildmat if specials present */
+ if (strpbrk (wildmat,",?![\\]")) wildmat[0] = '\0';
+ /* replace all % with * */
+ for (s = wildmat; s = strchr (s,'%'); *s = '*');
+ }
+ return ret ? LONGT : NIL;
+}
+\f
+/* NNTP 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)
+{
+ char mbx[MAILTMPLEN];
+ return nntp_isvalid (mailbox,mbx) ? newsrc_update (stream,mbx,':') : NIL;
+}
+
+
+/* NNTP 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)
+{
+ char mbx[MAILTMPLEN];
+ return nntp_isvalid (mailbox,mbx) ? newsrc_update (stream,mbx,'!') : NIL;
+}
+\f
+/* NNTP 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 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 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 *newname)
+{
+ return NIL; /* never valid for NNTP */
+}
+\f
+/* NNTP status
+ * Accepts: mail stream
+ * mailbox name
+ * status flags
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_status (MAILSTREAM *stream,char *mbx,long flags)
+{
+ MAILSTATUS status;
+ NETMBX mb;
+ unsigned long i,j,k,rnmsgs;
+ long ret = NIL;
+ char *s,*name,*state,tmp[MAILTMPLEN];
+ char *old = (stream && !stream->halfopen) ? LOCAL->name : NIL;
+ MAILSTREAM *tstream = NIL;
+ if (!(mail_valid_net_parse (mbx,&mb) && !strcmp (mb.service,"nntp") &&
+ *mb.mailbox &&
+ ((mb.mailbox[0] != '#') ||
+ ((mb.mailbox[1] == 'n') && (mb.mailbox[2] == 'e') &&
+ (mb.mailbox[3] == 'w') && (mb.mailbox[4] == 's') &&
+ (mb.mailbox[5] == '.'))))) {
+ sprintf (tmp,"Invalid NNTP name %s",mbx);
+ mm_log (tmp,ERROR);
+ return NIL;
+ }
+ /* note mailbox name */
+ name = (*mb.mailbox == '#') ? mb.mailbox+6 : mb.mailbox;
+ /* stream to reuse? */
+ if (!(stream && LOCAL->nntpstream &&
+ mail_usable_network_stream (stream,mbx)) &&
+ !(tstream = stream =
+ mail_open (NIL,mbx,OP_HALFOPEN|OP_SILENT|
+ ((flags & SA_MULNEWSRC) ? OP_MULNEWSRC : NIL))))
+ return NIL; /* can't reuse or make a new one */
+\f
+ if (nntp_send (LOCAL->nntpstream,"GROUP",name) == NNTPGOK) {
+ status.flags = flags; /* status validity flags */
+ k = strtoul (LOCAL->nntpstream->reply + 4,&s,10);
+ i = strtoul (s,&s,10); /* first assigned UID */
+ /* next UID to be assigned */
+ status.uidnext = (j = strtoul (s,NIL,10)) + 1;
+ /* maximum number of messages */
+ rnmsgs = status.messages = (i | j) ? status.uidnext - i : 0;
+ if (k > status.messages) { /* check for absurdity */
+ sprintf (tmp,"NNTP SERVER BUG (impossible message count): %lu > %lu",
+ k,status.messages);
+ mm_log (tmp,WARN);
+ }
+ /* restrict article range if needed */
+ if (nntp_range && (status.messages > nntp_range)) {
+ i = status.uidnext - (status.messages = nntp_range);
+ if (k > nntp_range) k = nntp_range;
+ }
+ /* initially zero */
+ status.recent = status.unseen = 0;
+ if (!status.messages); /* empty case */
+ /* use server guesstimate in simple case */
+ else if (!(flags & (SA_RECENT | SA_UNSEEN))) status.messages = k;
+\f
+ /* have newsrc state? */
+ else if (state = newsrc_state (stream,name)) {
+ /* yes, get the UID/sequence map */
+ if (nntp_getmap (stream,name,i,status.uidnext - 1,rnmsgs,
+ status.messages,tmp)) {
+ /* calculate true count */
+ for (status.messages = 0;
+ (s = net_getline (LOCAL->nntpstream->netstream)) &&
+ strcmp (s,"."); ) {
+ /* only count if in range */
+ if (((k = atol (s)) >= i) && (k < status.uidnext)) {
+ newsrc_check_uid (state,k,&status.recent,&status.unseen);
+ status.messages++;
+ }
+ fs_give ((void **) &s);
+ }
+ if (s) fs_give ((void **) &s);
+ }
+ /* assume c-client/NNTP map is entire range */
+ else while (i < status.uidnext)
+ newsrc_check_uid (state,i++,&status.recent,&status.unseen);
+ fs_give ((void **) &state);
+ }
+ /* no .newsrc state, all messages new */
+ else status.recent = status.unseen = status.messages;
+ /* UID validity is a constant */
+ status.uidvalidity = stream->uid_validity;
+ /* pass status to main program */
+ mm_status (stream,mbx,&status);
+ ret = T; /* succes */
+ }
+ /* flush temporary stream */
+ if (tstream) mail_close (tstream);
+ /* else reopen old newsgroup */
+ else if (old && nntp_send (LOCAL->nntpstream,"GROUP",old) != NNTPGOK) {
+ mm_log (LOCAL->nntpstream->reply,ERROR);
+ stream->halfopen = T; /* go halfopen */
+ }
+ return ret; /* success */
+}
+\f
+/* NNTP get map
+ * Accepts: stream
+ * newsgroup name
+ * first UID in map range
+ * last UID in map range
+ * reported total number of messages in newsgroup
+ * calculated number of messages in range
+ * temporary buffer
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_getmap (MAILSTREAM *stream,char *name,
+ unsigned long first,unsigned long last,
+ unsigned long rnmsgs,unsigned long nmsgs,char *tmp)
+{
+ short trylistgroup = NIL;
+ if (rnmsgs > (nmsgs * 8)) /* small subrange? */
+ trylistgroup = T; /* yes, can try LISTGROUP if [X]HDR fails */
+ else switch ((int) nntp_send (LOCAL->nntpstream,"LISTGROUP",name)) {
+ case NNTPGOK: /* got data */
+ return LONGT;
+ default: /* else give up if server claims LISTGROUP */
+ if (EXTENSION.listgroup) return NIL;
+ }
+ /* build range */
+ sprintf (tmp,"%lu-%lu",first,last);
+ if (EXTENSION.hdr) /* have HDR extension? */
+ return (nntp_send (LOCAL->nntpstream,"HDR Date",tmp) == NNTPHEAD) ?
+ LONGT : NIL;
+ if (LOCAL->xhdr) /* try the experimental extension then */
+ switch ((int) nntp_send (LOCAL->nntpstream,"XHDR Date",tmp)) {
+ case NNTPHEAD: /* got an overview? */
+ return LONGT;
+ case NNTPBADCMD: /* unknown command? */
+ LOCAL->xhdr = NIL; /* disable future XHDR attempts */
+ }
+ if (trylistgroup && /* no [X]HDR, maybe do LISTGROUP after all */
+ (nntp_send (LOCAL->nntpstream,"LISTGROUP",name) == NNTPGOK))
+ return LONGT;
+ return NIL;
+}
+\f
+/* NNTP open
+ * Accepts: stream to open
+ * Returns: stream on success, NIL on failure
+ */
+
+MAILSTREAM *nntp_mopen (MAILSTREAM *stream)
+{
+ unsigned long i,j,k,nmsgs,rnmsgs;
+ char *s,*mbx,tmp[MAILTMPLEN];
+ FILE *f;
+ NETMBX mb;
+ char *newsrc = (char *) mail_parameters (NIL,GET_NEWSRC,NIL);
+ newsrcquery_t nq = (newsrcquery_t) mail_parameters (NIL,GET_NEWSRCQUERY,NIL);
+ SENDSTREAM *nstream = NIL;
+ /* return prototype for OP_PROTOTYPE call */
+ if (!stream) return &nntpproto;
+ mail_valid_net_parse (stream->mailbox,&mb);
+ /* note mailbox anme */
+ mbx = (*mb.mailbox == '#') ? mb.mailbox+6 : mb.mailbox;
+ if (LOCAL) { /* recycle stream */
+ nstream = LOCAL->nntpstream;/* remember NNTP protocol stream */
+ sprintf (tmp,"Reusing connection to %s",net_host (nstream->netstream));
+ if (!stream->silent) mm_log (tmp,(long) NIL);
+ if (stream->rdonly) mb.readonlyflag = T;
+ if (LOCAL->tlsflag) mb.tlsflag = T;
+ if (LOCAL->tlssslv23) mb.tlssslv23 = T;
+ if (LOCAL->notlsflag) mb.notlsflag = T;
+ if (LOCAL->sslflag) mb.sslflag = T;
+ if (LOCAL->novalidate) mb.novalidate = T;
+ if (LOCAL->nntpstream->loser) mb.loser = T;
+ if (stream->secure) mb.secflag = T;
+ LOCAL->nntpstream = NIL; /* keep nntp_mclose() from punting it */
+ nntp_mclose (stream,NIL); /* do close action */
+ stream->dtb = &nntpdriver; /* reattach this driver */
+ }
+ /* copy flags */
+ if (mb.dbgflag) stream->debug = T;
+ if (mb.readonlyflag) stream->rdonly = T;
+ if (mb.secflag) stream->secure = T;
+ mb.trysslflag = stream->tryssl = (mb.trysslflag || stream->tryssl) ? T : NIL;
+ if (!nstream) { /* open NNTP now if not already open */
+ char *hostlist[2];
+ hostlist[0] = strcpy (tmp,mb.host);
+ if (mb.port || nntp_port)
+ sprintf (tmp + strlen (tmp),":%lu",mb.port ? mb.port : nntp_port);
+ if (mb.tlsflag) strcat (tmp,"/tls");
+ if (mb.tlssslv23) strcat (tmp,"/tls-sslv23");
+ if (mb.notlsflag) strcat (tmp,"/notls");
+ if (mb.sslflag) strcat (tmp,"/ssl");
+ if (mb.novalidate) strcat (tmp,"/novalidate-cert");
+ if (mb.loser) strcat (tmp,"/loser");
+ if (mb.secflag) strcat (tmp,"/secure");
+ if (mb.user[0]) sprintf (tmp + strlen (tmp),"/user=\"%s\"",mb.user);
+ hostlist[1] = NIL;
+ if (!(nstream = nntp_open (hostlist,NOP_READONLY |
+ (stream->debug ? NOP_DEBUG : NIL)))) return NIL;
+ }
+\f
+ /* always zero messages if halfopen */
+ if (stream->halfopen) i = j = k = rnmsgs = nmsgs = 0;
+ /* otherwise open the newsgroup */
+ else if (nntp_send (nstream,"GROUP",mbx) == NNTPGOK) {
+ k = strtoul (nstream->reply + 4,&s,10);
+ i = strtoul (s,&s,10);
+ stream->uid_last = j = strtoul (s,&s,10);
+ rnmsgs = nmsgs = (i | j) ? 1 + j - i : 0;
+ if (k > nmsgs) { /* check for absurdity */
+ sprintf (tmp,"NNTP SERVER BUG (impossible message count): %lu > %lu",
+ k,nmsgs);
+ mm_log (tmp,WARN);
+ }
+ /* restrict article range if needed */
+ if (nntp_range && (nmsgs > nntp_range)) i = 1 + j - (nmsgs = nntp_range);
+ }
+ else { /* no such newsgroup */
+ mm_log (nstream->reply,ERROR);
+ nntp_close (nstream); /* punt stream */
+ return NIL;
+ }
+ /* instantiate local data */
+ stream->local = memset (fs_get (sizeof (NNTPLOCAL)),0,sizeof (NNTPLOCAL));
+ LOCAL->nntpstream = nstream;
+ /* save state for future recycling */
+ if (mb.tlsflag) LOCAL->tlsflag = T;
+ if (mb.tlssslv23) LOCAL->tlssslv23 = T;
+ if (mb.notlsflag) LOCAL->notlsflag = T;
+ if (mb.sslflag) LOCAL->sslflag = T;
+ if (mb.novalidate) LOCAL->novalidate = T;
+ if (mb.loser) LOCAL->nntpstream->loser = T;
+ /* assume present until proven otherwise */
+ LOCAL->xhdr = LOCAL->xover = T;
+ LOCAL->name = cpystr (mbx); /* copy newsgroup name */
+ if (stream->mulnewsrc) { /* want to use multiple .newsrc files? */
+ strcpy (tmp,newsrc);
+ s = tmp + strlen (tmp); /* end of string */
+ *s++ = '-'; /* hyphen delimiter and host */
+ lcase (strcpy (s,(long) mail_parameters (NIL,GET_NEWSRCCANONHOST,NIL) ?
+ net_host (nstream->netstream) : mb.host));
+ LOCAL->newsrc = cpystr (nq ? (*nq) (stream,tmp,newsrc) : tmp);
+ }
+ else LOCAL->newsrc = cpystr (newsrc);
+ if (mb.user[0]) LOCAL->user = cpystr (mb.user);
+ stream->sequence++; /* bump sequence number */
+ stream->rdonly = stream->perm_deleted = T;
+ /* UIDs are always valid */
+ stream->uid_validity = 0xbeefface;
+ sprintf (tmp,"{%s:%lu/nntp",(long) mail_parameters (NIL,GET_TRUSTDNS,NIL) ?
+ net_host (nstream->netstream) : mb.host,
+ net_port (nstream->netstream));
+ if (LOCAL->tlsflag) strcat (tmp,"/tls");
+ if (LOCAL->tlssslv23) strcat (tmp,"/tls-sslv23");
+ if (LOCAL->notlsflag) strcat (tmp,"/notls");
+ if (LOCAL->sslflag) strcat (tmp,"/ssl");
+ if (LOCAL->novalidate) strcat (tmp,"/novalidate-cert");
+ if (LOCAL->nntpstream->loser) strcat (tmp,"/loser");
+ if (stream->secure) strcat (tmp,"/secure");
+ if (stream->rdonly) strcat (tmp,"/readonly");
+ if (LOCAL->user) sprintf (tmp + strlen (tmp),"/user=\"%s\"",LOCAL->user);
+ if (stream->halfopen) strcat (tmp,"}<no_mailbox>");
+ else sprintf (tmp + strlen (tmp),"}#news.%s",mbx);
+ fs_give ((void **) &stream->mailbox);
+ stream->mailbox = cpystr (tmp);
+\f
+ if (EXTENSION.over && /* get overview format if have OVER */
+ (nntp_send (LOCAL->nntpstream,"LIST","OVERVIEW.FMT") == NNTPGLIST) &&
+ (f = netmsg_slurp (LOCAL->nntpstream->netstream,&k,NIL))) {
+ fread (LOCAL->over_fmt = (char *) fs_get ((size_t) k + 3),
+ (size_t) 1,(size_t) k,f);
+ LOCAL->over_fmt[k] = '\0';
+ fclose (f); /* flush temp file */
+ }
+ if (nmsgs) { /* if any messages exist */
+ short silent = stream->silent;
+ stream->silent = T; /* don't notify main program yet */
+ mail_exists (stream,nmsgs); /* silently set the cache to the guesstimate */
+ /* get UID/sequence map, nuke holes */
+ if (nntp_getmap (stream,mbx,i,j,rnmsgs,nmsgs,tmp)) {
+ for (nmsgs = 0; /* calculate true count */
+ (s = net_getline (nstream->netstream)) && strcmp (s,"."); ) {
+ if ((k = atol (s)) > j){/* discard too high article numbers */
+ sprintf (tmp,"NNTP SERVER BUG (out of range article ID): %lu > %lu",
+ k,j);
+ mm_notify (stream,tmp,NIL);
+ stream->unhealthy = T;
+ }
+ else if (k >= i) { /* silently ignore too-low article numbers */
+ /* guard against server returning extra msgs */
+ if (nmsgs == stream->nmsgs) mail_exists (stream,nmsgs+1);
+ /* create elt for this message, set UID */
+ mail_elt (stream,++nmsgs)->private.uid = k;
+ }
+ fs_give ((void **) &s);
+ }
+ if (s) fs_give ((void **) &s);
+ }
+ /* assume c-client/NNTP map is entire range */
+ else for (k = 1; k <= nmsgs; k++) mail_elt (stream,k)->private.uid = i++;
+ stream->unhealthy = NIL; /* set healthy */
+ stream->nmsgs = 0; /* whack it back down */
+ stream->silent = silent; /* restore old silent setting */
+ mail_exists (stream,nmsgs); /* notify upper level that messages exist */
+ /* read .newsrc entries */
+ mail_recent (stream,newsrc_read (mbx,stream));
+ }
+ else { /* empty newsgroup or halfopen */
+ if (!(stream->silent || stream->halfopen)) {
+ sprintf (tmp,"Newsgroup %s is empty",mbx);
+ mm_log (tmp,WARN);
+ }
+ mail_exists (stream,(long) 0);
+ mail_recent (stream,(long) 0);
+ }
+ return stream; /* return stream to caller */
+}
+\f
+/* NNTP close
+ * Accepts: MAIL stream
+ * option flags
+ */
+
+void nntp_mclose (MAILSTREAM *stream,long options)
+{
+ unsigned long i;
+ MESSAGECACHE *elt;
+ if (LOCAL) { /* only if a file is open */
+ nntp_check (stream); /* dump final checkpoint */
+ if (LOCAL->over_fmt) fs_give ((void **) &LOCAL->over_fmt);
+ if (LOCAL->name) fs_give ((void **) &LOCAL->name);
+ if (LOCAL->user) fs_give ((void **) &LOCAL->user);
+ if (LOCAL->newsrc) fs_give ((void **) &LOCAL->newsrc);
+ if (LOCAL->txt) fclose (LOCAL->txt);
+ /* close NNTP connection */
+ if (LOCAL->nntpstream) nntp_close (LOCAL->nntpstream);
+ for (i = 1; i <= stream->nmsgs; i++)
+ if ((elt = mail_elt (stream,i))->private.spare.ptr)
+ fs_give ((void **) &elt->private.spare.ptr);
+ /* nuke the local data */
+ fs_give ((void **) &stream->local);
+ stream->dtb = NIL; /* log out the DTB */
+ }
+}
+\f
+/* NNTP fetch fast information
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ * This is ugly and slow
+ */
+
+void nntp_fetchfast (MAILSTREAM *stream,char *sequence,long flags)
+{
+ unsigned long i;
+ MESSAGECACHE *elt;
+ /* get sequence */
+ if (stream && LOCAL && ((flags & FT_UID) ?
+ mail_uid_sequence (stream,sequence) :
+ mail_sequence (stream,sequence)))
+ for (i = 1; i <= stream->nmsgs; i++) {
+ if ((elt = mail_elt (stream,i))->sequence && (elt->valid = T) &&
+ !(elt->day && elt->rfc822_size)) {
+ ENVELOPE **env = NIL;
+ ENVELOPE *e = NIL;
+ if (!stream->scache) env = &elt->private.msg.env;
+ else if (stream->msgno == i) env = &stream->env;
+ else env = &e;
+ if (!*env || !elt->rfc822_size) {
+ STRING bs;
+ unsigned long hs;
+ char *ht = (*stream->dtb->header) (stream,i,&hs,NIL);
+ /* need to make an envelope? */
+ if (!*env) rfc822_parse_msg (env,NIL,ht,hs,NIL,BADHOST,
+ stream->dtb->flags);
+ /* need message size too, ugh */
+ if (!elt->rfc822_size) {
+ (*stream->dtb->text) (stream,i,&bs,FT_PEEK);
+ elt->rfc822_size = hs + SIZE (&bs) - GETPOS (&bs);
+ }
+ }
+ /* if need date, have date in envelope? */
+ if (!elt->day && *env && (*env)->date)
+ mail_parse_date (elt,(*env)->date);
+ /* sigh, fill in bogus default */
+ if (!elt->day) elt->day = elt->month = 1;
+ mail_free_envelope (&e);
+ }
+ }
+}
+\f
+/* NNTP fetch flags
+ * Accepts: MAIL stream
+ * sequence
+ * option flags
+ */
+
+void nntp_flags (MAILSTREAM *stream,char *sequence,long flags)
+{
+ unsigned long i;
+ if ((flags & FT_UID) ? /* validate all elts */
+ mail_uid_sequence (stream,sequence) : mail_sequence (stream,sequence))
+ for (i = 1; i <= stream->nmsgs; i++) mail_elt (stream,i)->valid = T;
+}
+\f
+/* NNTP fetch overview
+ * Accepts: MAIL stream, sequence bits set
+ * overview return function
+ * Returns: T if successful, NIL otherwise
+ */
+
+long nntp_overview (MAILSTREAM *stream,overview_t ofn)
+{
+ unsigned long i,j,k,uid;
+ char c,*s,*t,*v,tmp[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ OVERVIEW ov;
+ if (!LOCAL->nntpstream->netstream) return NIL;
+ /* scan sequence to load cache */
+ for (i = 1; i <= stream->nmsgs; i++)
+ /* have cached overview yet? */
+ if ((elt = mail_elt (stream,i))->sequence && !elt->private.spare.ptr) {
+ for (j = i + 1; /* no, find end of cache gap range */
+ (j <= stream->nmsgs) && (elt = mail_elt (stream,j))->sequence &&
+ !elt->private.spare.ptr; j++);
+ /* make NNTP range */
+ sprintf (tmp,(i == (j - 1)) ? "%lu" : "%lu-%lu",mail_uid (stream,i),
+ mail_uid (stream,j - 1));
+ i = j; /* advance beyond gap */
+ /* ask server for overview data to cache */
+ if (nntp_over (stream,tmp)) {
+ while ((s = net_getline (LOCAL->nntpstream->netstream)) &&
+ strcmp (s,".")) {
+ /* death to embedded newlines */
+ for (t = v = s; c = *v++;)
+ if ((c != '\012') && (c != '\015')) *t++ = c;
+ *t++ = '\0'; /* tie off string in case it was shortened */
+ /* cache the overview if found its sequence */
+ if ((uid = atol (s)) && (k = mail_msgno (stream,uid)) &&
+ (t = strchr (s,'\t'))) {
+ if ((elt = mail_elt (stream,k))->private.spare.ptr)
+ fs_give ((void **) &elt->private.spare.ptr);
+ elt->private.spare.ptr = cpystr (t + 1);
+ }
+ else { /* shouldn't happen, snarl if it does */
+ sprintf (tmp,"Server returned data for unknown UID %lu",uid);
+ mm_notify (stream,tmp,WARN);
+ stream->unhealthy = T;
+ }
+ /* flush the overview */
+ fs_give ((void **) &s);
+ }
+ stream->unhealthy = NIL;/* set healthy */
+ /* flush the terminating dot */
+ if (s) fs_give ((void **) &s);
+ }
+ else i = stream->nmsgs; /* OVER failed, punt cache load */
+ }
+\f
+ /* now scan sequence to return overviews */
+ if (ofn) for (i = 1; i <= stream->nmsgs; i++)
+ if ((elt = mail_elt (stream,i))->sequence) {
+ uid = mail_uid (stream,i);/* UID for this message */
+ /* parse cached overview */
+ if (nntp_parse_overview (&ov,s = (char *) elt->private.spare.ptr,elt))
+ (*ofn) (stream,uid,&ov,i);
+ else { /* parse failed */
+ (*ofn) (stream,uid,NIL,i);
+ if (s && *s) { /* unusable cached entry? */
+ sprintf (tmp,"Unable to parse overview for UID %lu: %.500s",uid,s);
+ mm_notify (stream,tmp,WARN);
+ stream->unhealthy = T;
+ /* erase it from the cache */
+ fs_give ((void **) &s);
+ }
+ stream->unhealthy = NIL;/* set healthy */
+ /* insert empty cached text as necessary */
+ if (!s) elt->private.spare.ptr = cpystr ("");
+ }
+ /* clean up overview data */
+ if (ov.from) mail_free_address (&ov.from);
+ if (ov.subject) fs_give ((void **) &ov.subject);
+ }
+ return T;
+}
+\f
+/* Send OVER to NNTP server
+ * Accepts: mail stream
+ * sequence to send
+ * Returns: T if success and overviews will follow, else NIL
+ */
+
+long nntp_over (MAILSTREAM *stream,char *sequence)
+{
+ unsigned char *s;
+ /* test for Netscape Collabra server */
+ if (EXTENSION.over && LOCAL->xover &&
+ nntp_send (LOCAL->nntpstream,"OVER","0") == NNTPOVER) {
+ /* "Netscape-Collabra/3.52 03615 NNTP" responds to the OVER command with
+ * a bogus "Subject:From:Date:Bytes:Lines" response followed by overviews
+ * which lack the Message-ID and References:. This violates the draft
+ * NNTP specification (draft-ietf-nntpext-base-18.txt as of this writing).
+ * XOVER works fine.
+ */
+ while ((s = net_getline (LOCAL->nntpstream->netstream)) && strcmp (s,".")){
+ if (!isdigit (*s)) { /* is it that fetid piece of reptile dung? */
+ EXTENSION.over = NIL; /* sure smells like it */
+ mm_log ("Working around Netscape Collabra bug",WARN);
+ }
+ fs_give ((void **) &s); /* flush the overview */
+ }
+ if (s) fs_give ((void **) &s);
+ /* don't do this test again */
+ if (EXTENSION.over) LOCAL->xover = NIL;
+ }
+ if (EXTENSION.over) /* have OVER extension? */
+ return (nntp_send (LOCAL->nntpstream,"OVER",sequence) == NNTPOVER) ?
+ LONGT : NIL;
+ if (LOCAL->xover) /* try the experiment extension then */
+ switch ((int) nntp_send (LOCAL->nntpstream,"XOVER",sequence)) {
+ case NNTPOVER: /* got an overview? */
+ return LONGT;
+ case NNTPBADCMD: /* unknown command? */
+ LOCAL->xover = NIL; /* disable future XOVER attempts */
+ }
+ return NIL;
+}
+\f
+/* Parse OVERVIEW struct from cached NNTP OVER response
+ * Accepts: struct to load
+ * cached OVER response
+ * internaldate
+ * Returns: T if success, NIL if fail
+ */
+
+long nntp_parse_overview (OVERVIEW *ov,char *text,MESSAGECACHE *elt)
+{
+ char *t;
+ /* nothing in overview yet */
+ memset ((void *) ov,0,sizeof (OVERVIEW));
+ /* no cached data */
+ if (!(text && *text)) return NIL;
+ ov->subject = cpystr (text); /* make hackable copy of overview */
+ /* find end of Subject */
+ if (t = strchr (ov->subject,'\t')) {
+ *t++ = '\0'; /* tie off Subject, point to From */
+ /* find end of From */
+ if (ov->date = strchr (t,'\t')) {
+ *ov->date++ = '\0'; /* tie off From, point to Date */
+ /* load internaldate too */
+ if (!elt->day) mail_parse_date (elt,ov->date);
+ /* parse From */
+ rfc822_parse_adrlist (&ov->from,t,BADHOST);
+ /* find end of Date */
+ if (ov->message_id = strchr (ov->date,'\t')) {
+ /* tie off Date, point to Message-ID */
+ *ov->message_id++ = '\0';
+ /* find end of Message-ID */
+ if (ov->references = strchr (ov->message_id,'\t')) {
+ /* tie off Message-ID, point to References */
+ *ov->references++ = '\0';
+ /* fine end of References */
+ if (t = strchr (ov->references,'\t')) {
+ *t++ = '\0'; /* tie off References, point to octet size */
+ /* parse size of message in octets */
+ ov->optional.octets = atol (t);
+ /* find end of size */
+ if (t = strchr (t,'\t')) {
+ /* parse size of message in lines */
+ ov->optional.lines = atol (++t);
+ /* find Xref */
+ if (ov->optional.xref = strchr (t,'\t'))
+ *ov->optional.xref++ = '\0';
+ }
+ }
+ }
+ }
+ }
+ }
+ return ov->references ? T : NIL;
+}
+\f
+/* NNTP fetch header as text
+ * Accepts: mail stream
+ * message number
+ * pointer to return size
+ * flags
+ * Returns: header text
+ */
+
+char *nntp_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *size,
+ long flags)
+{
+ char tmp[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ FILE *f;
+ *size = 0;
+ if ((flags & FT_UID) && !(msgno = mail_msgno (stream,msgno))) return "";
+ /* have header text? */
+ if (!(elt = mail_elt (stream,msgno))->private.msg.header.text.data) {
+ sprintf (tmp,"%lu",mail_uid (stream,msgno));
+ /* get header text */
+ switch (nntp_send (LOCAL->nntpstream,"HEAD",tmp)) {
+ case NNTPHEAD:
+ if (f = netmsg_slurp (LOCAL->nntpstream->netstream,size,NIL)) {
+ fread (elt->private.msg.header.text.data =
+ (unsigned char *) fs_get ((size_t) *size + 3),
+ (size_t) 1,(size_t) *size,f);
+ fclose (f); /* flush temp file */
+ /* tie off header with extra CRLF and NUL */
+ elt->private.msg.header.text.data[*size] = '\015';
+ elt->private.msg.header.text.data[++*size] = '\012';
+ elt->private.msg.header.text.data[++*size] = '\0';
+ elt->private.msg.header.text.size = *size;
+ elt->valid = T; /* make elt valid now */
+ break;
+ }
+ /* fall into default case */
+ default: /* failed, mark as deleted and empty */
+ elt->valid = elt->deleted = T;
+ case NNTPSOFTFATAL: /* don't mark deleted if stream dead */
+ *size = elt->private.msg.header.text.size = 0;
+ break;
+ }
+ }
+ /* just return size of text */
+ else *size = elt->private.msg.header.text.size;
+ return elt->private.msg.header.text.data ?
+ (char *) elt->private.msg.header.text.data : "";
+}
+\f
+/* NNTP fetch body
+ * Accepts: mail stream
+ * message number
+ * pointer to stringstruct to initialize
+ * flags
+ * Returns: T if successful, else NIL
+ */
+
+long nntp_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
+{
+ char tmp[MAILTMPLEN];
+ MESSAGECACHE *elt;
+ INIT (bs,mail_string,(void *) "",0);
+ if ((flags & FT_UID) && !(msgno = mail_msgno (stream,msgno))) return NIL;
+ elt = mail_elt (stream,msgno);
+ /* different message, flush cache */
+ if (LOCAL->txt && (LOCAL->msgno != msgno)) {
+ fclose (LOCAL->txt);
+ LOCAL->txt = NIL;
+ }
+ LOCAL->msgno = msgno; /* note cached message */
+ if (!LOCAL->txt) { /* have file for this message? */
+ sprintf (tmp,"%lu",elt->private.uid);
+ switch (nntp_send (LOCAL->nntpstream,"BODY",tmp)) {
+ case NNTPBODY:
+ if (LOCAL->txt = netmsg_slurp (LOCAL->nntpstream->netstream,
+ &LOCAL->txtsize,NIL)) break;
+ /* fall into default case */
+ default: /* failed, mark as deleted */
+ elt->deleted = T;
+ case NNTPSOFTFATAL: /* don't mark deleted if stream dead */
+ return NIL;
+ }
+ }
+ if (!(flags & FT_PEEK)) { /* mark seen if needed */
+ elt->seen = T;
+ mm_flags (stream,elt->msgno);
+ }
+ INIT (bs,file_string,(void *) LOCAL->txt,LOCAL->txtsize);
+ return T;
+}
+\f
+/* NNTP fetch article from message ID (for news: URL support)
+ * Accepts: mail stream
+ * message ID
+ * pointer to return total message size
+ * pointer to return file size
+ * Returns: FILE * to message if successful, else NIL
+ */
+
+FILE *nntp_article (MAILSTREAM *stream,char *msgid,unsigned long *size,
+ unsigned long *hsiz)
+{
+ return (nntp_send (LOCAL->nntpstream,"ARTICLE",msgid) == NNTPARTICLE) ?
+ netmsg_slurp (LOCAL->nntpstream->netstream,size,hsiz) : NIL;
+}
+
+
+/* NNTP per-message modify flag
+ * Accepts: MAIL stream
+ * message cache element
+ */
+
+void nntp_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
+{
+ if (!LOCAL->dirty) { /* only bother checking if not dirty yet */
+ if (elt->valid) { /* if done, see if deleted changed */
+ if (elt->sequence != elt->deleted) LOCAL->dirty = T;
+ elt->sequence = T; /* leave the sequence set */
+ }
+ /* note current setting of deleted flag */
+ else elt->sequence = elt->deleted;
+ }
+}
+\f
+/* NNTP search messages
+ * Accepts: mail stream
+ * character set
+ * search program
+ * option flags
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_search (MAILSTREAM *stream,char *charset,SEARCHPGM *pgm,long flags)
+{
+ unsigned long i;
+ MESSAGECACHE *elt;
+ OVERVIEW ov;
+ char *msg;
+ /* make sure that charset is good */
+ if (msg = utf8_badcharset (charset)) {
+ MM_LOG (msg,ERROR); /* output error */
+ fs_give ((void **) &msg);
+ return NIL;
+ }
+ utf8_searchpgm (pgm,charset);
+ if (flags & SO_OVERVIEW) { /* only if specified to use overview */
+ /* identify messages that will be searched */
+ for (i = 1; i <= stream->nmsgs; ++i)
+ mail_elt (stream,i)->sequence = nntp_search_msg (stream,i,pgm,NIL);
+ nntp_overview (stream,NIL); /* load the overview cache */
+ }
+ /* init in case no overview at cleanup */
+ memset ((void *) &ov,0,sizeof (OVERVIEW));
+ /* otherwise do default search */
+ for (i = 1; i <= stream->nmsgs; ++i) {
+ if (((flags & SO_OVERVIEW) && ((elt = mail_elt (stream,i))->sequence) &&
+ nntp_parse_overview (&ov,(char *) elt->private.spare.ptr,elt)) ?
+ nntp_search_msg (stream,i,pgm,&ov) :
+ mail_search_msg (stream,i,NIL,pgm)) {
+ if (flags & SE_UID) mm_searched (stream,mail_uid (stream,i));
+ else { /* mark as searched, notify mail program */
+ mail_elt (stream,i)->searched = T;
+ if (!stream->silent) mm_searched (stream,i);
+ }
+ }
+ /* clean up overview data */
+ if (ov.from) mail_free_address (&ov.from);
+ if (ov.subject) fs_give ((void **) &ov.subject);
+ }
+ return LONGT;
+}
+\f
+/* NNTP search message
+ * Accepts: MAIL stream
+ * message number
+ * search program
+ * overview to search (NIL means preliminary pass)
+ * Returns: T if found, NIL otherwise
+ */
+
+long nntp_search_msg (MAILSTREAM *stream,unsigned long msgno,SEARCHPGM *pgm,
+ OVERVIEW *ov)
+{
+ unsigned short d;
+ unsigned long now = (unsigned long) time (0);
+ MESSAGECACHE *elt = mail_elt (stream,msgno);
+ SEARCHHEADER *hdr;
+ SEARCHOR *or;
+ SEARCHPGMLIST *not;
+ if (pgm->msgno || pgm->uid) { /* message set searches */
+ SEARCHSET *set;
+ /* message sequences */
+ if (set = pgm->msgno) { /* must be inside this sequence */
+ while (set) { /* run down until find matching range */
+ if (set->last ? ((msgno < set->first) || (msgno > set->last)) :
+ msgno != set->first) set = set->next;
+ else break;
+ }
+ if (!set) return NIL; /* not found within sequence */
+ }
+ if (set = pgm->uid) { /* must be inside this sequence */
+ unsigned long uid = mail_uid (stream,msgno);
+ while (set) { /* run down until find matching range */
+ if (set->last ? ((uid < set->first) || (uid > set->last)) :
+ uid != set->first) set = set->next;
+ else break;
+ }
+ if (!set) return NIL; /* not found within sequence */
+ }
+ }
+\f
+ /* Fast data searches */
+ /* message flags */
+ if ((pgm->answered && !elt->answered) ||
+ (pgm->unanswered && elt->answered) ||
+ (pgm->deleted && !elt->deleted) ||
+ (pgm->undeleted && elt->deleted) ||
+ (pgm->draft && !elt->draft) ||
+ (pgm->undraft && elt->draft) ||
+ (pgm->flagged && !elt->flagged) ||
+ (pgm->unflagged && elt->flagged) ||
+ (pgm->recent && !elt->recent) ||
+ (pgm->old && elt->recent) ||
+ (pgm->seen && !elt->seen) ||
+ (pgm->unseen && elt->seen)) return NIL;
+ /* keywords */
+ if ((pgm->keyword && !mail_search_keyword (stream,elt,pgm->keyword,LONGT)) ||
+ (pgm->unkeyword && mail_search_keyword (stream,elt,pgm->unkeyword,NIL)))
+ return NIL;
+ if (ov) { /* only do this if real searching */
+ MESSAGECACHE delt;
+ /* size ranges */
+ if ((pgm->larger && (ov->optional.octets <= pgm->larger)) ||
+ (pgm->smaller && (ov->optional.octets >= pgm->smaller))) return NIL;
+ /* date ranges */
+ if ((pgm->sentbefore || pgm->senton || pgm->sentsince ||
+ pgm->before || pgm->on || pgm->since) &&
+ (!mail_parse_date (&delt,ov->date) ||
+ !(d = mail_shortdate (delt.year,delt.month,delt.day)) ||
+ (pgm->sentbefore && (d >= pgm->sentbefore)) ||
+ (pgm->senton && (d != pgm->senton)) ||
+ (pgm->sentsince && (d < pgm->sentsince)) ||
+ (pgm->before && (d >= pgm->before)) ||
+ (pgm->on && (d != pgm->on)) ||
+ (pgm->since && (d < pgm->since)))) return NIL;
+ if (pgm->older || pgm->younger) {
+ unsigned long msgd = mail_longdate (elt);
+ if (pgm->older && msgd > (now - pgm->older)) return NIL;
+ if (pgm->younger && msgd < (now - pgm->younger)) return NIL;
+ }
+ if ((pgm->from && !mail_search_addr (ov->from,pgm->from)) ||
+ (pgm->subject && !mail_search_header_text (ov->subject,pgm->subject))||
+ (pgm->message_id &&
+ !mail_search_header_text (ov->message_id,pgm->message_id)) ||
+ (pgm->references &&
+ !mail_search_header_text (ov->references,pgm->references)))
+ return NIL;
+
+\f
+ /* envelope searches */
+ if (pgm->bcc || pgm->cc || pgm->to || pgm->return_path || pgm->sender ||
+ pgm->reply_to || pgm->in_reply_to || pgm->newsgroups ||
+ pgm->followup_to) {
+ ENVELOPE *env = mail_fetchenvelope (stream,msgno);
+ if (!env) return NIL; /* no envelope obtained */
+ /* search headers */
+ if ((pgm->bcc && !mail_search_addr (env->bcc,pgm->bcc)) ||
+ (pgm->cc && !mail_search_addr (env->cc,pgm->cc)) ||
+ (pgm->to && !mail_search_addr (env->to,pgm->to)))
+ return NIL;
+ /* These criteria are not supported by IMAP and have to be emulated */
+ if ((pgm->return_path &&
+ !mail_search_addr (env->return_path,pgm->return_path)) ||
+ (pgm->sender && !mail_search_addr (env->sender,pgm->sender)) ||
+ (pgm->reply_to && !mail_search_addr (env->reply_to,pgm->reply_to)) ||
+ (pgm->in_reply_to &&
+ !mail_search_header_text (env->in_reply_to,pgm->in_reply_to)) ||
+ (pgm->newsgroups &&
+ !mail_search_header_text (env->newsgroups,pgm->newsgroups)) ||
+ (pgm->followup_to &&
+ !mail_search_header_text (env->followup_to,pgm->followup_to)))
+ return NIL;
+ }
+\f
+ /* search header lines */
+ for (hdr = pgm->header; hdr; hdr = hdr->next) {
+ char *t,*e,*v;
+ SIZEDTEXT s;
+ STRINGLIST sth,stc;
+ sth.next = stc.next = NIL;/* only one at a time */
+ sth.text.data = hdr->line.data;
+ sth.text.size = hdr->line.size;
+ /* get the header text */
+ if ((t = mail_fetch_header (stream,msgno,NIL,&sth,&s.size,
+ FT_INTERNAL | FT_PEEK)) && strchr (t,':')) {
+ if (hdr->text.size) { /* anything matches empty search string */
+ /* non-empty, copy field data */
+ s.data = (unsigned char *) fs_get (s.size + 1);
+ /* for each line */
+ for (v = (char *) s.data, e = t + s.size; t < e;) switch (*t) {
+ default: /* non-continuation, skip leading field name */
+ while ((t < e) && (*t++ != ':'));
+ if ((t < e) && (*t == ':')) t++;
+ case '\t': case ' ': /* copy field data */
+ while ((t < e) && (*t != '\015') && (*t != '\012')) *v++ = *t++;
+ *v++ = '\n'; /* tie off line */
+ while (((*t == '\015') || (*t == '\012')) && (t < e)) t++;
+ }
+ /* calculate true size */
+ s.size = v - (char *) s.data;
+ *v = '\0'; /* tie off results */
+ stc.text.data = hdr->text.data;
+ stc.text.size = hdr->text.size;
+ /* search header */
+ if (mail_search_header (&s,&stc)) fs_give ((void **) &s.data);
+ else { /* search failed */
+ fs_give ((void **) &s.data);
+ return NIL;
+ }
+ }
+ }
+ else return NIL; /* no matching header text */
+ }
+ /* search strings */
+ if ((pgm->text &&
+ !mail_search_text (stream,msgno,NIL,pgm->text,LONGT))||
+ (pgm->body && !mail_search_text (stream,msgno,NIL,pgm->body,NIL)))
+ return NIL;
+ }
+ /* logical conditions */
+ for (or = pgm->or; or; or = or->next)
+ if (!(nntp_search_msg (stream,msgno,or->first,ov) ||
+ nntp_search_msg (stream,msgno,or->second,ov))) return NIL;
+ for (not = pgm->not; not; not = not->next)
+ if (nntp_search_msg (stream,msgno,not->pgm,ov)) return NIL;
+ return T;
+}
+\f
+/* NNTP sort messages
+ * Accepts: mail stream
+ * character set
+ * search program
+ * sort program
+ * option flags
+ * Returns: vector of sorted message sequences or NIL if error
+ */
+
+unsigned long *nntp_sort (MAILSTREAM *stream,char *charset,SEARCHPGM *spg,
+ SORTPGM *pgm,long flags)
+{
+ unsigned long i,start,last;
+ SORTCACHE **sc;
+ mailcache_t mailcache = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
+ unsigned long *ret = NIL;
+ sortresults_t sr = (sortresults_t) mail_parameters (NIL,GET_SORTRESULTS,NIL);
+ if (spg) { /* only if a search needs to be done */
+ int silent = stream->silent;
+ stream->silent = T; /* don't pass up mm_searched() events */
+ /* search for messages */
+ mail_search_full (stream,charset,spg,NIL);
+ stream->silent = silent; /* restore silence state */
+ }
+ /* initialize progress counters */
+ pgm->nmsgs = pgm->progress.cached = 0;
+ /* pass 1: count messages to sort */
+ for (i = 1,start = last = 0; i <= stream->nmsgs; ++i)
+ if (mail_elt (stream,i)->searched) {
+ pgm->nmsgs++;
+ /* have this in the sortcache already? */
+ if (!((SORTCACHE *) (*mailcache) (stream,i,CH_SORTCACHE))->date) {
+ /* no, record as last message */
+ last = mail_uid (stream,i);
+ /* and as first too if needed */
+ if (!start) start = last;
+ }
+ }
+ if (pgm->nmsgs) { /* pass 2: load sort cache */
+ sc = nntp_sort_loadcache (stream,pgm,start,last,flags);
+ /* pass 3: sort messages */
+ if (!pgm->abort) ret = mail_sort_cache (stream,pgm,sc,flags);
+ fs_give ((void **) &sc); /* don't need sort vector any more */
+ }
+ /* empty sort results */
+ else ret = (unsigned long *) memset (fs_get (sizeof (unsigned long)),0,
+ sizeof (unsigned long));
+ /* also return via callback if requested */
+ if (sr) (*sr) (stream,ret,pgm->nmsgs);
+ return ret;
+}
+\f
+/* Mail load sortcache
+ * Accepts: mail stream, already searched
+ * sort program
+ * first UID to OVER
+ * last UID to OVER
+ * option flags
+ * Returns: vector of sortcache pointers matching search
+ */
+
+SORTCACHE **nntp_sort_loadcache (MAILSTREAM *stream,SORTPGM *pgm,
+ unsigned long start,unsigned long last,
+ long flags)
+{
+ unsigned long i;
+ char c,*s,*t,*v,tmp[MAILTMPLEN];
+ SORTPGM *pg;
+ SORTCACHE **sc,*r;
+ MESSAGECACHE telt;
+ ADDRESS *adr = NIL;
+ mailcache_t mailcache = (mailcache_t) mail_parameters (NIL,GET_CACHE,NIL);
+ /* verify that the sortpgm is OK */
+ for (pg = pgm; pg; pg = pg->next) switch (pg->function) {
+ case SORTARRIVAL: /* sort by arrival date */
+ case SORTSIZE: /* sort by message size */
+ case SORTDATE: /* sort by date */
+ case SORTFROM: /* sort by first from */
+ case SORTSUBJECT: /* sort by subject */
+ break;
+ case SORTTO: /* sort by first to */
+ mm_notify (stream,"[NNTPSORT] Can't do To-field sorting in NNTP",WARN);
+ break;
+ case SORTCC: /* sort by first cc */
+ mm_notify (stream,"[NNTPSORT] Can't do cc-field sorting in NNTP",WARN);
+ break;
+ default:
+ fatal ("Unknown sort function");
+ }
+\f
+ if (start) { /* messages need to be loaded in sortcache? */
+ /* yes, build range */
+ if (start != last) sprintf (tmp,"%lu-%lu",start,last);
+ else sprintf (tmp,"%lu",start);
+ /* get it from the NNTP server */
+ if (!nntp_over (stream,tmp)) return mail_sort_loadcache (stream,pgm);
+ while ((s = net_getline (LOCAL->nntpstream->netstream)) && strcmp (s,".")){
+ /* death to embedded newlines */
+ for (t = v = s; c = *v++;) if ((c != '\012') && (c != '\015')) *t++ = c;
+ *t++ = '\0'; /* tie off resulting string */
+ /* parse OVER response */
+ if ((i = mail_msgno (stream,atol (s))) &&
+ (t = strchr (s,'\t')) && (v = strchr (++t,'\t'))) {
+ *v++ = '\0'; /* tie off subject */
+ /* put stripped subject in sortcache */
+ r = (SORTCACHE *) (*mailcache) (stream,i,CH_SORTCACHE);
+ r->refwd = mail_strip_subject (t,&r->subject);
+ if (t = strchr (v,'\t')) {
+ *t++ = '\0'; /* tie off from */
+ if (adr = rfc822_parse_address (&adr,adr,&v,BADHOST,0)) {
+ r->from = adr->mailbox;
+ adr->mailbox = NIL;
+ mail_free_address (&adr);
+ }
+ if (v = strchr (t,'\t')) {
+ *v++ = '\0'; /* tie off date */
+ if (mail_parse_date (&telt,t)) r->date = mail_longdate (&telt);
+ if ((v = strchr (v,'\t')) && (v = strchr (++v,'\t')))
+ r->size = atol (++v);
+ }
+ }
+ }
+ fs_give ((void **) &s);
+ }
+ if (s) fs_give ((void **) &s);
+ }
+\f
+ /* calculate size of sortcache index */
+ i = pgm->nmsgs * sizeof (SORTCACHE *);
+ /* instantiate the index */
+ sc = (SORTCACHE **) memset (fs_get ((size_t) i),0,(size_t) i);
+ /* see what needs to be loaded */
+ for (i = 1; !pgm->abort && (i <= stream->nmsgs); i++)
+ if ((mail_elt (stream,i))->searched) {
+ sc[pgm->progress.cached++] =
+ r = (SORTCACHE *) (*mailcache) (stream,i,CH_SORTCACHE);
+ r->pgm = pgm; /* note sort program */
+ r->num = (flags & SE_UID) ? mail_uid (stream,i) : i;
+ if (!r->date) r->date = r->num;
+ if (!r->arrival) r->arrival = mail_uid (stream,i);
+ if (!r->size) r->size = 1;
+ if (!r->from) r->from = cpystr ("");
+ if (!r->to) r->to = cpystr ("");
+ if (!r->cc) r->cc = cpystr ("");
+ if (!r->subject) r->subject = cpystr ("");
+ }
+ return sc;
+}
+
+
+/* NNTP thread messages
+ * Accepts: mail stream
+ * thread type
+ * character set
+ * search program
+ * option flags
+ * Returns: thread node tree
+ */
+
+THREADNODE *nntp_thread (MAILSTREAM *stream,char *type,char *charset,
+ SEARCHPGM *spg,long flags)
+{
+ return mail_thread_msgs (stream,type,charset,spg,flags,nntp_sort);
+}
+\f
+/* NNTP ping mailbox
+ * Accepts: MAIL stream
+ * Returns: T if stream alive, else NIL
+ */
+
+long nntp_ping (MAILSTREAM *stream)
+{
+ return (nntp_send (LOCAL->nntpstream,"STAT",NIL) != NNTPSOFTFATAL);
+}
+
+
+/* NNTP check mailbox
+ * Accepts: MAIL stream
+ */
+
+void nntp_check (MAILSTREAM *stream)
+{
+ /* never do if no updates */
+ if (LOCAL->dirty) newsrc_write (LOCAL->name,stream);
+ LOCAL->dirty = NIL;
+}
+
+
+/* NNTP expunge mailbox
+ * Accepts: MAIL stream
+ * sequence to expunge if non-NIL
+ * expunge options
+ * Returns: T if success, NIL if failure
+ */
+
+long nntp_expunge (MAILSTREAM *stream,char *sequence,long options)
+{
+ if (!stream->silent) mm_log ("Expunge ignored on readonly mailbox",NIL);
+ return LONGT;
+}
+\f
+/* NNTP copy message(s)
+ * Accepts: MAIL stream
+ * sequence
+ * destination mailbox
+ * option flags
+ * Returns: T if copy successful, else NIL
+ */
+
+long nntp_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
+{
+ mailproxycopy_t pc =
+ (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
+ if (pc) return (*pc) (stream,sequence,mailbox,options);
+ mm_log ("Copy not valid for NNTP",ERROR);
+ return NIL;
+}
+
+
+/* NNTP append message from stringstruct
+ * Accepts: MAIL stream
+ * destination mailbox
+ * append callback
+ * data for callback
+ * Returns: T if append successful, else NIL
+ */
+
+long nntp_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
+{
+ mm_log ("Append not valid for NNTP",ERROR);
+ return NIL;
+}
+\f
+/* NNTP open connection
+ * Accepts: network driver
+ * service host list
+ * port number
+ * service name
+ * NNTP open options
+ * Returns: SEND stream on success, NIL on failure
+ */
+
+SENDSTREAM *nntp_open_full (NETDRIVER *dv,char **hostlist,char *service,
+ unsigned long port,long options)
+{
+ SENDSTREAM *stream = NIL;
+ NETSTREAM *netstream = NIL;
+ NETMBX mb;
+ char tmp[MAILTMPLEN];
+ long extok = LONGT;
+ NETDRIVER *ssld = (NETDRIVER *) mail_parameters (NIL,GET_SSLDRIVER,NIL);
+ sslstart_t stls = (sslstart_t) mail_parameters (NIL,GET_SSLSTART,NIL);
+ if (!(hostlist && *hostlist)) mm_log ("Missing NNTP service host",ERROR);
+ else do { /* try to open connection */
+ sprintf (tmp,"{%.200s/%.20s}",*hostlist,service ? service : "nntp");
+ if (!mail_valid_net_parse (tmp,&mb) || mb.anoflag) {
+ sprintf (tmp,"Invalid host specifier: %.80s",*hostlist);
+ mm_log (tmp,ERROR);
+ }
+ else { /* light tryssl flag if requested */
+ mb.trysslflag = (options & NOP_TRYSSL) ? T : NIL;
+ /* default port */
+ if (mb.port) port = mb.port;
+ else if (!port) port = nntp_port ? nntp_port : NNTPTCPPORT;
+ if (netstream = /* try to open ordinary connection */
+ net_open (&mb,dv,port,
+ (NETDRIVER *) mail_parameters (NIL,GET_SSLDRIVER,NIL),
+ "*nntps",nntp_sslport ? nntp_sslport : NNTPSSLPORT)) {
+ stream = (SENDSTREAM *) fs_get (sizeof (SENDSTREAM));
+ /* initialize stream */
+ memset ((void *) stream,0,sizeof (SENDSTREAM));
+ stream->netstream = netstream;
+ stream->host = cpystr ((long) mail_parameters (NIL,GET_TRUSTDNS,NIL) ?
+ net_host (netstream) : mb.host);
+ stream->debug = (mb.dbgflag || (options & NOP_DEBUG)) ? T : NIL;
+ if (mb.loser) stream->loser = T;
+ /* process greeting */
+ switch ((int) nntp_reply (stream)) {
+ case NNTPGREET: /* allow posting */
+ NNTP.post = T;
+ mm_notify (NIL,stream->reply + 4,(long) NIL);
+ break;
+ case NNTPGREETNOPOST: /* posting not allowed, must be readonly */
+ NNTP.post = NIL;
+ break;
+ default:
+ mm_log (stream->reply,ERROR);
+ stream = nntp_close (stream);
+ break;
+ }
+ }
+ }
+ } while (!stream && *++hostlist);
+\f
+ /* get extensions */
+ if (stream && extok)
+ extok = nntp_extensions (stream,(mb.secflag ? AU_SECURE : NIL) |
+ (mb.authuser[0] ? AU_AUTHUSER : NIL));
+ if (stream && !dv && stls && NNTP.ext.starttls &&
+ !mb.sslflag && !mb.notlsflag &&
+ (nntp_send_work (stream,"STARTTLS",NNTP.ext.multidomain ? mb.host : NIL)
+ == NNTPTLSSTART)) {
+ mb.tlsflag = T; /* TLS OK, get into TLS at this end */
+ stream->netstream->dtb = ssld;
+ /* negotiate TLS */
+ if (stream->netstream->stream =
+ (*stls) (stream->netstream->stream,mb.host,
+ (mb.tlssslv23 ? NIL : NET_TLSCLIENT) |
+ (mb.novalidate ? NET_NOVALIDATECERT:NIL)))
+ extok = nntp_extensions (stream,(mb.secflag ? AU_SECURE : NIL) |
+ (mb.authuser[0] ? AU_AUTHUSER : NIL));
+ else {
+ sprintf (tmp,"Unable to negotiate TLS with this server: %.80s",mb.host);
+ mm_log (tmp,ERROR);
+ /* close without doing QUIT */
+ if (stream->netstream) net_close (stream->netstream);
+ stream->netstream = NIL;
+ stream = nntp_close (stream);
+ }
+ }
+ else if (mb.tlsflag) { /* user specified /tls but can't do it */
+ mm_log ("Unable to negotiate TLS with this server",ERROR);
+ return NIL;
+ }
+ if (stream) { /* have a session? */
+ if (mb.user[0]) { /* yes, have user name? */
+ if ((long) mail_parameters (NIL,GET_TRUSTDNS,NIL)) {
+ /* remote name for authentication */
+ strncpy (mb.host,(long) mail_parameters (NIL,GET_SASLUSESPTRNAME,NIL) ?
+ net_remotehost (netstream) : net_host (netstream),
+ NETMAXHOST-1);
+ mb.host[NETMAXHOST-1] = '\0';
+ }
+ if (!nntp_send_auth_work (stream,&mb,tmp,NIL))
+ stream = nntp_close (stream);
+ }
+ /* authenticate if no-post and not readonly */
+ else if (!(NNTP.post || (options & NOP_READONLY) ||
+ nntp_send_auth (stream,NIL))) stream = nntp_close (stream);
+ }
+\f
+ /* in case server demands MODE READER */
+ if (stream) switch ((int) nntp_send_work (stream,"MODE","READER")) {
+ case NNTPGREET:
+ NNTP.post = T;
+ break;
+ case NNTPGREETNOPOST:
+ NNTP.post = NIL;
+ break;
+ case NNTPWANTAUTH: /* server wants auth first, do so and retry */
+ case NNTPWANTAUTH2: /* remote name for authentication */
+ if ((long) mail_parameters (NIL,GET_TRUSTDNS,NIL)) {
+ strncpy (mb.host,(long) mail_parameters (NIL,GET_SASLUSESPTRNAME,NIL) ?
+ net_remotehost (netstream) : net_host (netstream),NETMAXHOST-1);
+ mb.host[NETMAXHOST-1] = '\0';
+ }
+ if (nntp_send_auth_work (stream,&mb,tmp,NIL))
+ switch ((int) nntp_send (stream,"MODE","READER")) {
+ case NNTPGREET:
+ NNTP.post = T;
+ break;
+ case NNTPGREETNOPOST:
+ NNTP.post = NIL;
+ break;
+ }
+ else stream = nntp_close (stream);
+ break;
+ }
+ if (stream) { /* looks like we have a stream? */
+ /* yes, make sure can post if not readonly */
+ if (!(NNTP.post || (options & NOP_READONLY))) stream = nntp_close (stream);
+ else if (extok) nntp_extensions (stream,(mb.secflag ? AU_SECURE : NIL) |
+ (mb.authuser[0] ? AU_AUTHUSER : NIL));
+ }
+ return stream;
+}
+\f
+/* NNTP extensions
+ * Accepts: stream
+ * authenticator flags
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_extensions (SENDSTREAM *stream,long flags)
+{
+ unsigned long i;
+ char *t,*r,*args;
+ /* zap all old extensions */
+ memset (&NNTP.ext,0,sizeof (NNTP.ext));
+ if (stream->loser) return NIL;/* nothing at all for losers */
+ /* get server extensions */
+ switch ((int) nntp_send_work (stream,"LIST","EXTENSIONS")) {
+ case NNTPEXTOK: /* what NNTP base spec says */
+ case NNTPGLIST: /* some servers do this instead */
+ break;
+ default: /* no LIST EXTENSIONS on this server */
+ return NIL;
+ }
+ NNTP.ext.ok = T; /* server offers extensions */
+ while ((t = net_getline (stream->netstream)) && (t[1] || (*t != '.'))) {
+ if (stream->debug) mm_dlog (t);
+ /* get optional capability arguments */
+ if (args = strchr (t,' ')) *args++ = '\0';
+ if (!compare_cstring (t,"LISTGROUP")) NNTP.ext.listgroup = T;
+ else if (!compare_cstring (t,"OVER")) NNTP.ext.over = T;
+ else if (!compare_cstring (t,"HDR")) NNTP.ext.hdr = T;
+ else if (!compare_cstring (t,"PAT")) NNTP.ext.pat = T;
+ else if (!compare_cstring (t,"STARTTLS")) NNTP.ext.starttls = T;
+ else if (!compare_cstring (t,"MULTIDOMAIN")) NNTP.ext.multidomain = T;
+\f
+ else if (!compare_cstring (t,"AUTHINFO") && args) {
+ char *sasl = NIL;
+ for (args = strtok_r (args," ",&r); args; args = strtok_r (NIL," ",&r)) {
+ if (!compare_cstring (args,"USER")) NNTP.ext.authuser = T;
+ else if (((args[0] == 'S') || (args[0] == 's')) &&
+ ((args[1] == 'A') || (args[1] == 'a')) &&
+ ((args[2] == 'S') || (args[2] == 's')) &&
+ ((args[3] == 'L') || (args[3] == 'l')) && (args[4] == ':'))
+ sasl = args + 5;
+ }
+ if (sasl) { /* if SASL, look up authenticators */
+ for (sasl = strtok_r (sasl,",",&r); sasl; sasl = strtok_r (NIL,",",&r))
+ if ((i = mail_lookup_auth_name (sasl,flags)) &&
+ (--i < MAXAUTHENTICATORS))
+ NNTP.ext.sasl |= (1 << i);
+ /* disable LOGIN if PLAIN also advertised */
+ if ((i = mail_lookup_auth_name ("PLAIN",NIL)) &&
+ (--i < MAXAUTHENTICATORS) && (NNTP.ext.sasl & (1 << i)) &&
+ (i = mail_lookup_auth_name ("LOGIN",NIL)) &&
+ (--i < MAXAUTHENTICATORS)) NNTP.ext.sasl &= ~(1 << i);
+ }
+ }
+ fs_give ((void **) &t);
+ }
+ if (t) { /* flush end of text indicator */
+ if (stream->debug) mm_dlog (t);
+ fs_give ((void **) &t);
+ }
+ return LONGT;
+}
+\f
+/* NNTP close connection
+ * Accepts: SEND stream
+ * Returns: NIL always
+ */
+
+SENDSTREAM *nntp_close (SENDSTREAM *stream)
+{
+ if (stream) { /* send "QUIT" */
+ if (stream->netstream) nntp_send (stream,"QUIT",NIL);
+ /* do close actions */
+ if (stream->netstream) net_close (stream->netstream);
+ if (stream->host) fs_give ((void **) &stream->host);
+ if (stream->reply) fs_give ((void **) &stream->reply);
+ fs_give ((void **) &stream);/* flush the stream */
+ }
+ return NIL;
+}
+\f
+/* NNTP deliver news
+ * Accepts: SEND stream
+ * message envelope
+ * message body
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_mail (SENDSTREAM *stream,ENVELOPE *env,BODY *body)
+{
+ long ret;
+ RFC822BUFFER buf;
+ char *s,path[MAILTMPLEN],tmp[SENDBUFLEN+1];
+ long error = NIL;
+ long retry = NIL;
+ buf.f = nntp_soutr; /* initialize buffer */
+ buf.s = stream->netstream;
+ buf.end = (buf.beg = buf.cur = tmp) + SENDBUFLEN;
+ tmp[SENDBUFLEN] = '\0'; /* must have additional null guard byte */
+ /* 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. It's been
+ * alleged that "Path: not-for-mail" is also acceptable, but we won't
+ * make assumptions unless the user says so.
+ *
+ * Second, 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!!!
+ *
+ * Third, Netscape Collabra server doesn't give the NNTPWANTAUTH error
+ * until after requesting and receiving the entire message. So we can't
+ * call rely upon nntp_send() to do the auth retry.
+ */
+ /* RFC-1036 requires this cretinism */
+ sprintf (path,"Path: %s!%s\015\012",net_localhost (stream->netstream),
+ env->sender ? env->sender->mailbox :
+ (env->from ? env->from->mailbox : "not-for-mail"));
+ /* here's another cretinism */
+ if (s = strstr (env->date," (")) *s = NIL;
+ do if ((ret = nntp_send_work (stream,"POST",NIL)) == NNTPREADY)
+ /* output data, return success status */
+ ret = (net_soutr (stream->netstream,
+ nntp_hidepath ? "Path: not-for-mail\015\012" : path) &&
+ rfc822_output_full (&buf,env,body,T)) ?
+ nntp_send_work (stream,".",NIL) :
+ nntp_fake (stream,"NNTP connection broken (message text)");
+ while (((ret == NNTPWANTAUTH) || (ret == NNTPWANTAUTH2)) &&
+ nntp_send_auth (stream,LONGT));
+ if (s) *s = ' '; /* put the comment in the date back */
+ if (ret == NNTPOK) return LONGT;
+ else if (ret < 400) { /* if not an error reply */
+ sprintf (tmp,"Unexpected NNTP posting reply code %ld",ret);
+ mm_log (tmp,WARN); /* so someone looks at this eventually */
+ if ((ret >= 200) && (ret < 300)) return LONGT;
+ }
+ return NIL;
+}
+\f
+/* NNTP send command
+ * Accepts: SEND stream
+ * text
+ * Returns: reply code
+ */
+
+long nntp_send (SENDSTREAM *stream,char *command,char *args)
+{
+ long ret;
+ switch ((int) (ret = nntp_send_work (stream,command,args))) {
+ case NNTPWANTAUTH: /* authenticate and retry */
+ case NNTPWANTAUTH2:
+ if (nntp_send_auth (stream,LONGT))
+ ret = nntp_send_work (stream,command,args);
+ else { /* we're probably hosed, nuke the session */
+ nntp_send (stream,"QUIT",NIL);
+ /* close net connection */
+ if (stream->netstream) net_close (stream->netstream);
+ stream->netstream = NIL;
+ }
+ default: /* all others just return */
+ break;
+ }
+ return ret;
+}
+
+
+/* NNTP send command worker routine
+ * Accepts: SEND stream
+ * text
+ * Returns: reply code
+ */
+
+long nntp_send_work (SENDSTREAM *stream,char *command,char *args)
+{
+ long ret;
+ char *s = (char *) fs_get (strlen (command) + (args ? strlen (args) + 1 : 0)
+ + 3);
+ if (!stream->netstream) ret = nntp_fake (stream,"NNTP connection lost");
+ else { /* build the complete command */
+ if (args) sprintf (s,"%s %s",command,args);
+ else strcpy (s,command);
+ if (stream->debug) mail_dlog (s,stream->sensitive);
+ strcat (s,"\015\012");
+ /* send the command */
+ ret = net_soutr (stream->netstream,s) ? nntp_reply (stream) :
+ nntp_fake (stream,"NNTP connection broken (command)");
+ }
+ fs_give ((void **) &s);
+ return ret;
+}
+\f
+/* NNTP send authentication if needed
+ * Accepts: SEND stream
+ * flags (non-NIL to get new extensions)
+ * Returns: T if need to redo command, NIL otherwise
+ */
+
+long nntp_send_auth (SENDSTREAM *stream,long flags)
+{
+ NETMBX mb;
+ char tmp[MAILTMPLEN];
+ /* remote name for authentication */
+ sprintf (tmp,"{%.200s/nntp",(long) mail_parameters (NIL,GET_TRUSTDNS,NIL) ?
+ ((long) mail_parameters (NIL,GET_SASLUSESPTRNAME,NIL) ?
+ net_remotehost (stream->netstream) : net_host (stream->netstream)):
+ stream->host);
+ if (stream->netstream->dtb ==
+ (NETDRIVER *) mail_parameters (NIL,GET_SSLDRIVER,NIL))
+ strcat (tmp,"/ssl");
+ strcat (tmp,"}<none>");
+ mail_valid_net_parse (tmp,&mb);
+ return nntp_send_auth_work (stream,&mb,tmp,flags);
+}
+\f
+/* NNTP send authentication worker routine
+ * Accepts: SEND stream
+ * NETMBX structure
+ * scratch buffer of length MAILTMPLEN
+ * flags (non-NIL to get new extensions)
+ * Returns: T if authenticated, NIL otherwise
+ */
+
+long nntp_send_auth_work (SENDSTREAM *stream,NETMBX *mb,char *pwd,long flags)
+{
+ unsigned long trial,auths;
+ char tmp[MAILTMPLEN],usr[MAILTMPLEN];
+ AUTHENTICATOR *at;
+ char *lsterr = NIL;
+ long ret = NIL;
+ /* try SASL first */
+ for (auths = NNTP.ext.sasl, stream->saslcancel = NIL;
+ !ret && stream->netstream && auths &&
+ (at = mail_lookup_auth (find_rightmost_bit (&auths) + 1)); ) {
+ if (lsterr) { /* previous authenticator failed? */
+ sprintf (tmp,"Retrying using %s authentication after %.80s",
+ at->name,lsterr);
+ mm_log (tmp,NIL);
+ fs_give ((void **) &lsterr);
+ }
+ trial = 0; /* initial trial count */
+ tmp[0] = '\0'; /* empty buffer */
+ if (stream->netstream) do {
+ if (lsterr) {
+ sprintf (tmp,"Retrying %s authentication after %.80s",at->name,lsterr);
+ mm_log (tmp,WARN);
+ fs_give ((void **) &lsterr);
+ }
+ stream->saslcancel = NIL;
+ if (nntp_send (stream,"AUTHINFO SASL",at->name) == NNTPCHALLENGE) {
+ /* hide client authentication responses */
+ if (!(at->flags & AU_SECURE)) stream->sensitive = T;
+ if ((*at->client) (nntp_challenge,nntp_response,"nntp",mb,stream,
+ &trial,usr)) {
+ if (stream->replycode == NNTPAUTHED) ret = LONGT;
+ /* if main program requested cancellation */
+ else if (!trial) mm_log ("NNTP Authentication cancelled",ERROR);
+ }
+ stream->sensitive = NIL;/* unhide */
+ }
+ /* remember response if error and no cancel */
+ if (!ret && trial) lsterr = cpystr (stream->reply);
+ } while (!ret && stream->netstream && trial &&
+ (trial < nntp_maxlogintrials));
+ }
+\f
+ if (lsterr) { /* SAIL failed? */
+ if (!stream->saslcancel) { /* don't do this if a cancel */
+ sprintf (tmp,"Can not authenticate to NNTP server: %.80s",lsterr);
+ mm_log (tmp,ERROR);
+ }
+ fs_give ((void **) &lsterr);
+ }
+ else if (mb->secflag) /* no SASL, can't do /secure */
+ mm_log ("Can't do secure authentication with this server",ERROR);
+ else if (mb->authuser[0]) /* or /authuser */
+ mm_log ("Can't do /authuser with this server",ERROR);
+ /* Always try AUTHINFO USER, even if NNTP.ext.authuser isn't set. There
+ * are servers that require it but don't return it as an extension.
+ */
+ else for (trial = 0, pwd[0] = 'x';
+ !ret && pwd[0] && (trial < nntp_maxlogintrials) &&
+ stream->netstream; ) {
+ pwd[0] = NIL; /* get user name and password */
+ mm_login (mb,usr,pwd,trial++);
+ /* do the authentication */
+ if (pwd[0]) switch ((int) nntp_send_work (stream,"AUTHINFO USER",usr)) {
+ case NNTPBADCMD: /* give up if unrecognized command */
+ mm_log (NNTP.ext.authuser ? stream->reply :
+ "Can't do AUTHINFO USER to this server",ERROR);
+ trial = nntp_maxlogintrials;
+ break;
+ case NNTPAUTHED: /* successful authentication */
+ ret = LONGT; /* guess no password was needed */
+ break;
+ case NNTPWANTPASS: /* wants password */
+ stream->sensitive = T; /* hide this command */
+ if (nntp_send_work (stream,"AUTHINFO PASS",pwd) == NNTPAUTHED)
+ ret = LONGT; /* password OK */
+ stream->sensitive = NIL; /* unhide */
+ if (ret) break; /* OK if successful */
+ default: /* authentication failed */
+ mm_log (stream->reply,WARN);
+ if (trial == nntp_maxlogintrials)
+ mm_log ("Too many NNTP authentication failures",ERROR);
+ }
+ /* user refused to give a password */
+ else mm_log ("Login aborted",ERROR);
+ }
+ memset (pwd,0,MAILTMPLEN); /* erase password */
+ /* get new extensions if needed */
+ if (ret && flags) nntp_extensions (stream,(mb->secflag ? AU_SECURE : NIL) |
+ (mb->authuser[0] ? AU_AUTHUSER : NIL));
+ return ret;
+}
+\f
+/* Get challenge to authenticator in binary
+ * Accepts: stream
+ * pointer to returned size
+ * Returns: challenge or NIL if not challenge
+ */
+
+void *nntp_challenge (void *s,unsigned long *len)
+{
+ char tmp[MAILTMPLEN];
+ void *ret = NIL;
+ SENDSTREAM *stream = (SENDSTREAM *) s;
+ if ((stream->replycode == NNTPCHALLENGE) &&
+ !(ret = rfc822_base64 ((unsigned char *) stream->reply + 4,
+ strlen (stream->reply + 4),len))) {
+ sprintf (tmp,"NNTP SERVER BUG (invalid challenge): %.80s",stream->reply+4);
+ mm_log (tmp,ERROR);
+ }
+ return ret;
+}
+
+
+/* Send authenticator response in BASE64
+ * Accepts: MAIL stream
+ * string to send
+ * length of string
+ * Returns: T, always
+ */
+
+long nntp_response (void *s,char *response,unsigned long size)
+{
+ SENDSTREAM *stream = (SENDSTREAM *) s;
+ unsigned long i,j;
+ char *t,*u;
+ if (response) { /* make CRLFless BASE64 string */
+ if (size) {
+ for (t = (char *) rfc822_binary ((void *) response,size,&i),u = t,j = 0;
+ j < i; j++) if (t[j] > ' ') *u++ = t[j];
+ *u = '\0'; /* tie off string */
+ i = nntp_send_work (stream,t,NIL);
+ fs_give ((void **) &t);
+ }
+ else i = nntp_send_work (stream,"",NIL);
+ }
+ else { /* abort requested */
+ i = nntp_send_work (stream,"*",NIL);
+ stream->saslcancel = T; /* mark protocol-requested SASL cancel */
+ }
+ return LONGT;
+}
+\f
+/* NNTP get reply
+ * Accepts: SEND stream
+ * Returns: reply code
+ */
+
+long nntp_reply (SENDSTREAM *stream)
+{
+ /* flush old reply */
+ if (stream->reply) fs_give ((void **) &stream->reply);
+ /* get reply */
+ if (!(stream->reply = net_getline (stream->netstream)))
+ return nntp_fake (stream,"NNTP connection broken (response)");
+ if (stream->debug) mm_dlog (stream->reply);
+ /* handle continuation by recursion */
+ if (stream->reply[3] == '-') return nntp_reply (stream);
+ /* return response code */
+ return stream->replycode = atol (stream->reply);
+}
+
+
+/* NNTP set fake error
+ * Accepts: SEND stream
+ * error text
+ * Returns: error code
+ */
+
+long nntp_fake (SENDSTREAM *stream,char *text)
+{
+ if (stream->netstream) { /* close net connection if still open */
+ net_close (stream->netstream);
+ stream->netstream = NIL;
+ }
+ /* flush any old reply */
+ if (stream->reply) fs_give ((void **) &stream->reply);
+ /* set up pseudo-reply string */
+ stream->reply = (char *) fs_get (20+strlen (text));
+ sprintf (stream->reply,"%ld %s",NNTPSOFTFATAL,text);
+ return NNTPSOFTFATAL; /* return error code */
+}
+\f
+/* NNTP filter mail
+ * Accepts: stream
+ * string
+ * Returns: T on success, NIL on failure
+ */
+
+long nntp_soutr (void *stream,char *s)
+{
+ char c,*t;
+ /* "." on first line */
+ if (s[0] == '.') net_soutr (stream,".");
+ /* find lines beginning with a "." */
+ while (t = strstr (s,"\015\012.")) {
+ c = *(t += 3); /* remember next character after "." */
+ *t = '\0'; /* tie off string */
+ /* output prefix */
+ if (!net_soutr (stream,s)) return NIL;
+ *t = c; /* restore delimiter */
+ s = t - 1; /* push pointer up to the "." */
+ }
+ /* output remainder of text */
+ return *s ? net_soutr (stream,s) : T;
+}
projects / uw-imap / commitdiff