+ c = CtdlGetRoom(&QRscratch, requested_room);
+
+ /* Then try a mailbox name match */
+ if (c != 0) {
+ CtdlMailboxName(augmented_roomname, sizeof augmented_roomname, &CC->user, requested_room);
+ c = CtdlGetRoom(&QRscratch, augmented_roomname);
+ if (c == 0) {
+ safestrncpy(requested_room, augmented_roomname, sizeof(requested_room));
+ }
+ }
+
+ /* If the room exists, check security/access */
+ if (c == 0) {
+ /* See if there is an existing user/room relationship */
+ CtdlRoomAccess(&QRscratch, &CC->user, &ra, NULL);
+
+ /* normal clients have to pass through security */
+ if (ra & UA_KNOWN) {
+ ok = 1;
+ }
+ }
+
+ /* Fail here if no such room */
+ if (!ok) {
+ cprintf("411 no such newsgroup\r\n");
+ return;
+ }
+
+
+ /*
+ * CtdlUserGoto() formally takes us to the desired room, happily returning
+ * the number of messages and number of new messages.
+ */
+ memcpy(&CC->room, &QRscratch, sizeof(struct ctdlroom));
+ CtdlUserGoto(NULL, 0, 0, &msgs, &new, &oldest, &newest);
+ cprintf("211 %d %ld %ld %s\r\n", msgs, oldest, newest, requested_group);
+
+ // If this is a GROUP command, set the "current article number" to zero, and then stop here.
+ if (!strcasecmp(verb, "GROUP")) {
+ nntpstate->current_article_number = oldest;
+ return;
+ }
+
+ // If we get to this point we are running a LISTGROUP command. Fetch those message numbers.
+ CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL, nntp_listgroup_backend, &lr);
+ cprintf(".\r\n");
+}
+
+
+//
+// Implements the MODE command
+//
+void nntp_mode(const char *cmd) {
+
+ char which_mode[16];
+
+ extract_token(which_mode, cmd, 1, ' ', sizeof which_mode);
+
+ if (!strcasecmp(which_mode, "reader")) {
+ // FIXME implement posting and change to 200
+ cprintf("201 Reader mode activated\r\n");
+ }
+ else {
+ cprintf("501 unknown mode\r\n");
+ }
+}
+
+
+//
+// Implements the ARTICLE, HEAD, BODY, and STAT commands.
+// (These commands all accept the same parameters; they differ only in how they output the retrieved message.)
+//
+void nntp_article(const char *cmd) {
+ if (CtdlAccessCheck(ac_logged_in_or_guest)) return;
+
+ citnntp *nntpstate = (citnntp *) CC->session_specific_data;
+ char which_command[16];
+ int acmd = 0;
+ char requested_article[256];
+ long requested_msgnum = 0;
+ char *lb, *rb = NULL;
+ int must_change_currently_selected_article = 0;
+
+ // We're going to store one of these values in the variable 'acmd' so that
+ // we can quickly check later which version of the output we want.
+ enum {
+ ARTICLE,
+ HEAD,
+ BODY,
+ STAT
+ };
+
+ extract_token(which_command, cmd, 0, ' ', sizeof which_command);
+
+ if (!strcasecmp(which_command, "article")) {
+ acmd = ARTICLE;
+ }
+ else if (!strcasecmp(which_command, "head")) {
+ acmd = HEAD;
+ }
+ else if (!strcasecmp(which_command, "body")) {
+ acmd = BODY;
+ }
+ else if (!strcasecmp(which_command, "stat")) {
+ acmd = STAT;
+ }
+ else {
+ cprintf("500 I'm afraid I can't do that.\r\n");
+ return;
+ }
+
+ // Which NNTP command was issued, determines whether we will fetch headers, body, or both.
+ int headers_only = HEADERS_ALL;
+ if (acmd == HEAD) headers_only = HEADERS_FAST;
+ else if (acmd == BODY) headers_only = HEADERS_NONE;
+ else if (acmd == STAT) headers_only = HEADERS_FAST;
+
+ // now figure out what the client is asking for.
+ extract_token(requested_article, cmd, 1, ' ', sizeof requested_article);
+ lb = strchr(requested_article, '<');
+ rb = strchr(requested_article, '>');
+ requested_msgnum = atol(requested_article);
+
+ // If no article number or message-id is specified, the client wants the "currently selected article"
+ if (IsEmptyStr(requested_article)) {
+ if (nntpstate->current_article_number < 1) {
+ cprintf("420 No current article selected\r\n");
+ return;
+ }
+ requested_msgnum = nntpstate->current_article_number;
+ must_change_currently_selected_article = 1;
+ // got it -- now fall through and keep going
+ }
+
+ // If the requested article is numeric, it maps directly to a message number. Good.
+ else if (requested_msgnum > 0) {
+ must_change_currently_selected_article = 1;
+ // good -- fall through and keep going
+ }
+
+ // If the requested article has angle brackets, the client wants a specific message-id.
+ // We don't know how to do that yet.
+ else if ( (lb != NULL) && (rb != NULL) && (lb < rb) ) {
+ must_change_currently_selected_article = 0;
+ cprintf("500 I don't know how to fetch by message-id yet.\r\n"); // FIXME
+ return;
+ }
+
+ // Anything else is noncompliant gobbledygook and should die in a car fire.
+ else {
+ must_change_currently_selected_article = 0;
+ cprintf("500 syntax error\r\n");
+ return;
+ }
+
+ // At this point we know the message number of the "article" being requested.
+ // We have an awesome API call that does all the heavy lifting for us.
+ char *fetched_message_id = NULL;
+ CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
+ int fetch = CtdlOutputMsg(requested_msgnum,
+ MT_RFC822, // output in RFC822 format ... sort of
+ headers_only, // headers, body, or both?
+ 0, // don't do Citadel protocol responses
+ 1, // CRLF newlines
+ NULL, // teh whole thing, not just a section
+ 0, // no flags yet ... maybe new ones for Path: etc ?
+ NULL,
+ NULL,
+ &fetched_message_id // extract the message ID from the message as we go...
+ );
+ StrBuf *msgtext = CC->redirect_buffer;
+ CC->redirect_buffer = NULL;
+
+ if (fetch != om_ok) {
+ cprintf("423 no article with that number\r\n");
+ FreeStrBuf(&msgtext);
+ return;
+ }
+
+ // RFC3977 6.2.1.2 specifes conditions under which the "currently selected article"
+ // MUST or MUST NOT be set to the message we just referenced.
+ if (must_change_currently_selected_article) {
+ nntpstate->current_article_number = requested_msgnum;
+ }
+
+ // Now give the client what it asked for.
+ if (acmd == ARTICLE) {
+ cprintf("220 %ld <%s>\r\n", requested_msgnum, fetched_message_id);
+ }
+ if (acmd == HEAD) {
+ cprintf("221 %ld <%s>\r\n", requested_msgnum, fetched_message_id);
+ }
+ if (acmd == BODY) {
+ cprintf("222 %ld <%s>\r\n", requested_msgnum, fetched_message_id);
+ }
+ if (acmd == STAT) {
+ cprintf("223 %ld <%s>\r\n", requested_msgnum, fetched_message_id);
+ FreeStrBuf(&msgtext);
+ return;
+ }