Changes in protocols/jabber/presence.c [dded27d:8c1eb80]

File:

• protocols/jabber/presence.c (modified) (4 diffs)

protocols/jabber/presence.c

@@ -29 +29 @@
         char *from = xt_find_attr( node, "from" );
         char *type = xt_find_attr( node, "type" );      /* NULL should mean the person is online. */
-        struct xt_node *c;
+        struct xt_node *c, *cap;
         struct jabber_buddy *bud, *send_presence = NULL;
         int is_chat = 0;
@@ -76 +76 @@
                 else
                         bud->priority = 0;
+                
+                if( bud && ( cap = xt_find_node( node->children, "c" ) ) &&
+                    ( s = xt_find_attr( cap, "xmlns" ) ) && strcmp( s, XMLNS_CAPS ) == 0 )
+                {
+                        /* This <presence> stanza includes an XEP-0115
+                           capabilities part. Not too interesting, but we can
+                           see if it has an ext= attribute. */
+                        s = xt_find_attr( cap, "ext" );
+                        if( s && ( strstr( s, "cstates" ) || strstr( s, "chatstate" ) ) )
+                                bud->flags |= JBFLAG_DOES_XEP85;
+                        
+                        /* This field can contain more information like xhtml
+                           support, but we don't support that ourselves.
+                           Officially the ext= tag was deprecated, but enough
+                           clients do send it.
+                           
+                           (I'm aware that this is not the right way to use
+                           this field.) See for an explanation of ext=:
+                           http://www.xmpp.org/extensions/attic/xep-0115-1.3.html*/
+                }
                 
                 if( is_chat )
@@ -186 +206 @@
 {
         struct jabber_data *jd = ic->proto_data;
-        struct xt_node *node;
+        struct xt_node *node, *cap;
         char *show = jd->away_state->code;
         char *status = jd->away_message;
@@ -199 +219 @@
                 xt_add_child( node, xt_new_node( "status", status, NULL ) );
         
+        /* This makes the packet slightly bigger, but clients interested in
+           capabilities can now cache the discovery info. This reduces the
+           usual post-login iq-flood. See XEP-0115. At least libpurple and
+           Trillian seem to do this right. */
+        cap = xt_new_node( "c", NULL, NULL );
+        xt_add_attr( cap, "xmlns", XMLNS_CAPS );
+        xt_add_attr( cap, "node", "http://bitlbee.org/xmpp/caps" );
+        xt_add_attr( cap, "ver", BITLBEE_VERSION ); /* The XEP wants this hashed, but nobody's doing that. */
+        xt_add_child( node, cap );
+        
         st = jabber_write_packet( ic, node );