X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fmodules%2Fxmpp%2Fxmpp_presence.c;fp=citadel%2Fmodules%2Fxmpp%2Fxmpp_presence.c;h=0000000000000000000000000000000000000000;hb=f6fcf350671e3661f8f22696eb35133014ab6a14;hp=00fb4e3bd77534c9ee48bbea95bf814def457fee;hpb=2e4e67a1f7f65568abace99d13a71024ad06ebde;p=citadel.git

diff --git a/citadel/modules/xmpp/xmpp_presence.c b/citadel/modules/xmpp/xmpp_presence.c
deleted file mode 100644
index 00fb4e3bd..000000000
--- a/citadel/modules/xmpp/xmpp_presence.c
+++ /dev/null
@@ -1,377 +0,0 @@
-/*
- * Handle XMPP presence exchanges
- *
- * Copyright (c) 2007-2021 by Art Cancro and citadel.org
- *
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <assert.h>
-#include <time.h>
-#include <sys/wait.h>
-#include <string.h>
-#include <limits.h>
-#include <ctype.h>
-#include <expat.h>
-#include <libcitadel.h>
-#include "citadel.h"
-#include "server.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "internet_addressing.h"
-#include "ctdl_module.h"
-#include "serv_xmpp.h"
-
-
-/* 
- * Indicate the presence of another user to the client
- * (used in several places)
- */
-void xmpp_indicate_presence(char *presence_jid) {
-	char xmlbuf[256];
-
-	syslog(LOG_DEBUG, "xmpp: indicating presence of <%s> to <%s>", presence_jid, XMPP->client_jid);
-	cprintf("<presence from=\"%s\" ", xmlesc(xmlbuf, presence_jid, sizeof xmlbuf));
-	cprintf("to=\"%s\"></presence>", xmlesc(xmlbuf, XMPP->client_jid, sizeof xmlbuf));
-}
-
-
-/*
- * Convenience function to determine whether any given session is 'visible' to any other given session,
- * and is capable of receiving instant messages from that session.
- */
-int xmpp_is_visible(struct CitContext *cptr, struct CitContext *to_whom) {
-	int aide = (to_whom->user.axlevel >= AxAideU);
-
-	if (	(cptr->logged_in)
-		&& 	(((cptr->cs_flags&CS_STEALTH)==0) || (aide))	/* aides see everyone */
-		&&	(cptr->user.usernum != to_whom->user.usernum)	/* don't show myself */
-		&&	(cptr->can_receive_im)				/* IM-capable session */
-	) {
-		return(1);
-	}
-	else {
-		return(0);
-	}
-}
-
-
-/* 
- * Initial dump of the entire wholist
- */
-void xmpp_wholist_presence_dump(void) {
-	struct CitContext *cptr = NULL;
-	int nContexts, i;
-	
-	cptr = CtdlGetContextArray(&nContexts);
-	if (!cptr) {
-		return;
-	}
-
-	for (i=0; i<nContexts; i++) {
-		if (xmpp_is_visible(&cptr[i], CC)) {
-			xmpp_indicate_presence(cptr[i].cs_principal_id);
-		}
-	}
-	free(cptr);
-}
-
-
-/*
- * Function to remove a buddy subscription and delete from the roster
- * (used in several places)
- */
-void xmpp_destroy_buddy(char *presence_jid, int aggressively) {
-	static int unsolicited_id = 1;
-	char xmlbuf1[256];
-	char xmlbuf2[256];
-
-	if (!presence_jid) return;
-	if (!XMPP) return;
-	if (!XMPP->client_jid) return;
-
-	/* Transmit non-presence information */
-	cprintf("<presence type=\"unavailable\" from=\"%s\" to=\"%s\"></presence>",
-		xmlesc(xmlbuf1, presence_jid, sizeof xmlbuf1),
-		xmlesc(xmlbuf2, XMPP->client_jid, sizeof xmlbuf2)
-	);
-
-	/*
-	 * Setting the "aggressively" flag also sends an "unsubscribed" presence update.
-	 * We only ask for this when flushing the client side roster, because if we do it
-	 * in the middle of a session when another user logs off, some clients (Jitsi) interpret
-	 * it as a rejection of a subscription request.
-	 */
-	if (aggressively) {
-		cprintf("<presence type=\"unsubscribed\" from=\"%s\" to=\"%s\"></presence>",
-			xmlesc(xmlbuf1, presence_jid, sizeof xmlbuf1),
-			xmlesc(xmlbuf2, XMPP->client_jid, sizeof xmlbuf2)
-		);
-	}
-
-	// note: we should implement xmpp_indicate_nonpresence so we can use it elsewhere
-
-	/* Do an unsolicited roster update that deletes the contact. */
-	cprintf("<iq from=\"%s\" to=\"%s\" id=\"unbuddy_%x\" type=\"result\">",
-		xmlesc(xmlbuf1, CC->cs_principal_id, sizeof xmlbuf1),
-		xmlesc(xmlbuf2, XMPP->client_jid, sizeof xmlbuf2),
-		++unsolicited_id
-	);
-	cprintf("<query xmlns=\"jabber:iq:roster\">");
-	cprintf("<item jid=\"%s\" subscription=\"remove\">", xmlesc(xmlbuf1, presence_jid, sizeof xmlbuf1));
-	cprintf("<group>%s</group>", xmlesc(xmlbuf1, CtdlGetConfigStr("c_humannode"), sizeof xmlbuf1));
-	cprintf("</item>");
-	cprintf("</query>"
-		"</iq>"
-	);
-}
-
-
-/*
- * When a user logs in or out of the local Citadel system, notify all XMPP sessions about it.
- * THIS FUNCTION HAS A BUG IN IT THAT ENUMERATES THE SESSIONS WRONG.
- */
-void xmpp_presence_notify(char *presence_jid, int event_type) {
-	struct CitContext *cptr;
-	static int unsolicited_id = 12345;
-	int visible_sessions = 0;
-	int nContexts, i;
-	int which_cptr_is_relevant = (-1);
-
-	if (IsEmptyStr(presence_jid)) return;
-	if (CC->kill_me) return;
-
-	cptr = CtdlGetContextArray(&nContexts);
-	if (!cptr) {
-		return;
-	}
-
-	/* Count the visible sessions for this user */
-	for (i=0; i<nContexts; i++) {
-		if ( (!strcasecmp(cptr[i].cs_principal_id, presence_jid))
-		   && (xmpp_is_visible(&cptr[i], CC))
-		)  {
-			++visible_sessions;
-			which_cptr_is_relevant = i;
-		}
-	}
-
-	syslog(LOG_DEBUG, "xmpp: %d sessions for <%s> are now visible to session %d", visible_sessions, presence_jid, CC->cs_pid);
-
-	if ( (event_type == XMPP_EVT_LOGIN) && (visible_sessions == 1) ) {
-
-		syslog(LOG_DEBUG, "xmpp: telling session %d that <%s> logged in", CC->cs_pid, presence_jid);
-
-		/* Do an unsolicited roster update that adds a new contact. */
-		assert(which_cptr_is_relevant >= 0);
-		cprintf("<iq id=\"unsolicited_%x\" type=\"result\">", ++unsolicited_id);
-		cprintf("<query xmlns=\"jabber:iq:roster\">");
-		xmpp_roster_item(&cptr[which_cptr_is_relevant]);
-		cprintf("</query></iq>");
-
-		/* Transmit presence information */
-		xmpp_indicate_presence(presence_jid);
-	}
-
-	if (visible_sessions == 0) {
-		syslog(LOG_DEBUG, "xmpp: telling session %d that <%s> logged out", CC->cs_pid, presence_jid);
-		xmpp_destroy_buddy(presence_jid, 0);	/* non aggressive presence update */
-	}
-
-	free(cptr);
-}
-
-
-void xmpp_fetch_mortuary_backend(long msgnum, void *userdata) {
-	HashList *mortuary = (HashList *) userdata;
-	struct CtdlMessage *msg;
-	char *ptr = NULL;
-	char *lasts = NULL;
-
-	msg = CtdlFetchMessage(msgnum, 1);
-	if (msg == NULL) {
-		return;
-	}
-
-	/* now add anyone we find into the hashlist */
-
-	/* skip past the headers */
-	ptr = strstr(msg->cm_fields[eMesageText], "\n\n");
-	if (ptr != NULL) {
-		ptr += 2;
-	}
-	else {
-		ptr = strstr(msg->cm_fields[eMesageText], "\n\r\n");
-		if (ptr != NULL) {
-			ptr += 3;
-		}
-	}
-
-	/* the remaining lines are addresses */
-	if (ptr != NULL) {
-		ptr = strtok_r(ptr, "\n", &lasts);
-		while (ptr != NULL) {
-			char *pch = strdup(ptr);
-			Put(mortuary, pch, strlen(pch), pch, NULL);
-			ptr = strtok_r(NULL, "\n", &lasts);
-		}
-	}
-
-	CM_Free(msg);
-}
-
-
-/*
- * Fetch the "mortuary" - a list of dead buddies which we keep around forever
- * so we can remove them from any client's roster that still has them listed
- */
-HashList *xmpp_fetch_mortuary(void) {
-	HashList *mortuary = NewHash(1, NULL);
-	if (!mortuary) {
-		syslog(LOG_ALERT, "xmpp: NewHash() failed!");
-		return(NULL);
-	}
-
-        if (CtdlGetRoom(&CC->room, USERCONFIGROOM) != 0) {
-		/* no config room exists - no further processing is required. */
-                return(mortuary);
-        }
-        CtdlForEachMessage(MSGS_LAST, 1, NULL, XMPPMORTUARY, NULL,
-                xmpp_fetch_mortuary_backend, (void *)mortuary );
-
-	return(mortuary);
-}
-
-
-/*
- * Fetch the "mortuary" - a list of dead buddies which we keep around forever
- * so we can remove them from any client's roster that still has them listed
- */
-void xmpp_store_mortuary(HashList *mortuary) {
-	HashPos *HashPos;
-	long len;
-	void *Value;
-	const char *Key;
-	StrBuf *themsg;
-
-	themsg = NewStrBuf();
-	StrBufPrintf(themsg,	"Content-type: " XMPPMORTUARY "\n"
-				"Content-transfer-encoding: 7bit\n"
-				"\n"
-	);
-
-	HashPos = GetNewHashPos(mortuary, 0);
-	while (GetNextHashPos(mortuary, HashPos, &len, &Key, &Value) != 0) {
-		StrBufAppendPrintf(themsg, "%s\n", (char *)Value);
-	}
-	DeleteHashPos(&HashPos);
-
-	/* Delete the old mortuary */
-	CtdlDeleteMessages(USERCONFIGROOM, NULL, 0, XMPPMORTUARY);
-
-	/* And save the new one to disk */
-	quickie_message(CC->user.fullname, NULL, NULL, USERCONFIGROOM, ChrPtr(themsg), 4, "XMPP Mortuary");
-	FreeStrBuf(&themsg);
-}
-
-
-/*
- * Upon logout we make an attempt to delete the whole roster, in order to
- * try to keep "ghost" buddies from remaining in the client-side roster.
- *
- * Since the client is probably not still alive, also remember the current
- * roster for next time so we can delete dead buddies then.
- */
-void xmpp_massacre_roster(void) {
-	struct CitContext *cptr;
-	int nContexts, i;
-	HashList *mortuary = xmpp_fetch_mortuary();
-
-	cptr = CtdlGetContextArray(&nContexts);
-	if (cptr) {
-		for (i=0; i<nContexts; i++) {
-			if (xmpp_is_visible(&cptr[i], CC)) {
-				if (mortuary) {
-					char *buddy = strdup(cptr[i].cs_principal_id);
-					Put(mortuary, buddy, strlen(buddy), buddy, NULL);
-				}
-			}
-		}
-		free (cptr);
-	}
-
-	if (mortuary) {
-		xmpp_store_mortuary(mortuary);
-		DeleteHash(&mortuary);
-	}
-}
-
-
-/*
- * Stupidly, XMPP does not specify a way to tell the client to flush its client-side roster
- * and prepare to receive a new one.  So instead we remember every buddy we've ever told the
- * client about, and push delete operations out at the beginning of a session.
- * 
- * We omit any users who happen to be online right now, but we still keep them in the mortuary,
- * which needs to be maintained as a list of every buddy the user has ever seen.  We don't know
- * when they're connecting from the same client and when they're connecting from a different client,
- * so we have no guarantee of what is in the client side roster at connect time.
- */
-void xmpp_delete_old_buddies_who_no_longer_exist_from_the_client_roster(void) {
-	long len;
-	void *Value;
-	const char *Key;
-	struct CitContext *cptr;
-	int nContexts, i;
-	int online_now = 0;
-	HashList *mortuary = xmpp_fetch_mortuary();
-	HashPos *HashPos = GetNewHashPos(mortuary, 0);
-
-	/* we need to omit anyone who is currently online */
-	cptr = CtdlGetContextArray(&nContexts);
-
-	/* go through the list of users in the mortuary... */
-	while (GetNextHashPos(mortuary, HashPos, &len, &Key, &Value) != 0)
-	{
-
-		online_now = 0;
-		if (cptr) for (i=0; i<nContexts; i++) {
-			if (xmpp_is_visible(&cptr[i], CC)) {
-				if (!strcasecmp(cptr[i].cs_principal_id, (char *)Value)) {
-					online_now = 1;
-				}
-			}
-		}
-
-		if (!online_now) {
-			xmpp_destroy_buddy((char *)Value, 1);	/* aggressive presence update */
-		}
-
-	}
-	DeleteHashPos(&HashPos);
-	DeleteHash(&mortuary);
-	free(cptr);
-}