citadel/modules/jabber/xmpp_presence.c

   1 /*
   2  * $Id$
   3  *
   4  * Handle XMPP presence exchanges
   5  *
   6  * Copyright (c) 2007 by Art Cancro
   7  * This code is released under the terms of the GNU General Public License.
   8  *
   9  */
  10
  11 #include "sysdep.h"
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <stdio.h>
  15 #include <fcntl.h>
  16 #include <signal.h>
  17 #include <pwd.h>
  18 #include <errno.h>
  19 #include <sys/types.h>
  20
  21 #if TIME_WITH_SYS_TIME
  22 # include <sys/time.h>
  23 # include <time.h>
  24 #else
  25 # if HAVE_SYS_TIME_H
  26 #  include <sys/time.h>
  27 # else
  28 #  include <time.h>
  29 # endif
  30 #endif
  31
  32 #include <sys/wait.h>
  33 #include <string.h>
  34 #include <limits.h>
  35 #include <ctype.h>
  36 #include <libcitadel.h>
  37 #include "citadel.h"
  38 #include "server.h"
  39 #include "citserver.h"
  40 #include "support.h"
  41 #include "config.h"
  42 #include "internet_addressing.h"
  43 #include "md5.h"
  44 #include "ctdl_module.h"
  45
  46 #ifdef HAVE_EXPAT
  47 #include <expat.h>
  48 #include "serv_xmpp.h"
  49
  50
  51 /*
  52  * Initial dump of the entire wholist
  53  */
  54 void jabber_wholist_presence_dump(void)
  55 {
  56         struct CitContext *cptr = NULL;
  57         int nContexts, i;
  58
  59         int aide = (CC->user.axlevel >= 6);
  60
  61         cptr = CtdlGetContextArray(&nContexts);
  62         if (!cptr)
  63                 return ; /** FIXME: Does jabber need to send something to maintain the protocol?  */
  64
  65         for (i=0; i<nContexts; i++) {
  66                 if (cptr[i].logged_in) {
  67                         if (
  68                            (((cptr[i].cs_flags&CS_STEALTH)==0) || (aide))               /* aides see everyone */
  69                            && (cptr[i].user.usernum != CC->user.usernum)                /* don't show myself */
  70                            ) {
  71                                 cprintf("<presence type=\"available\" from=\"%s\"></presence>",
  72                                         cptr[i].cs_inet_email);
  73                         }
  74                 }
  75         }
  76         free(cptr);
  77 }
  78
  79
  80
  81 /*
  82  * When a user logs in or out of the local Citadel system, notify all Jabber sessions
  83  * about it.
  84  */
  85 void xmpp_presence_notify(char *presence_jid, int event_type) {
  86         struct CitContext *cptr;
  87         static int unsolicited_id;
  88         int visible_sessions = 0;
  89         int aide = (CC->user.axlevel >= 6);
  90
  91         if (IsEmptyStr(presence_jid)) return;
  92
  93         /* Count the visible sessions for this user */
  94         for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
  95                 if (cptr->logged_in) {
  96                         if (  (!strcasecmp(cptr->cs_inet_email, presence_jid))
  97                            && (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
  98                            ) {
  99                                 ++visible_sessions;
 100                         }
 101                 }
 102         }
 103
 104         lprintf(CTDL_DEBUG, "%d sessions for <%s> are now visible to session %d\n",
 105                 visible_sessions, presence_jid, CC->cs_pid);
 106
 107         if ( (event_type == XMPP_EVT_LOGIN) && (visible_sessions == 1) ) {
 108
 109                 lprintf(CTDL_DEBUG, "Telling session %d that <%s> logged in\n", CC->cs_pid, presence_jid);
 110
 111                 /* Do an unsolicited roster update that adds a new contact. */
 112                 for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
 113                         if (cptr->logged_in) {
 114                                 if (!strcasecmp(cptr->cs_inet_email, presence_jid)) {
 115                                         cprintf("<iq id=\"unsolicited_%x\" type=\"result\">",
 116                                                 ++unsolicited_id);
 117                                         cprintf("<query xmlns=\"jabber:iq:roster\">");
 118                                         jabber_roster_item(cptr);
 119                                         cprintf("</query>"
 120                                                 "</iq>");
 121                                 }
 122                         }
 123                 }
 124
 125                 /* Transmit presence information */
 126                 cprintf("<presence type=\"available\" from=\"%s\"></presence>", presence_jid);
 127         }
 128
 129         if (visible_sessions == 0) {
 130                 lprintf(CTDL_DEBUG, "Telling session %d that <%s> logged out\n", CC->cs_pid, presence_jid);
 131
 132                 /* Transmit non-presence information */
 133                 cprintf("<presence type=\"unavailable\" from=\"%s\"></presence>", presence_jid);
 134                 cprintf("<presence type=\"unsubscribed\" from=\"%s\"></presence>", presence_jid);
 135
 136                 /* Do an unsolicited roster update that deletes the contact. */
 137                 cprintf("<iq id=\"unsolicited_%x\" type=\"result\">", ++unsolicited_id);
 138                 cprintf("<query xmlns=\"jabber:iq:roster\">");
 139                 cprintf("<item jid=\"%s\" subscription=\"remove\">", presence_jid);
 140                 cprintf("<group>%s</group>", config.c_humannode);
 141                 cprintf("</item>");
 142                 cprintf("</query>"
 143                         "</iq>");
 144         }
 145 }
 146
 147
 148 #endif  /* HAVE_EXPAT */