dialog: provide means to fetch dialog by h_entry and h_id

(cherry picked from commit f73a2b4)

modules/dialog/dialog.c

@@ -643,6 +643,7 @@ int load_dlg( struct dlg_binds *dlgb )
 	dlgb->get_direction = get_dlg_direction;
 	dlgb->get_dlg_did = dlg_get_did;
 	dlgb->get_dlg_by_did = get_dlg_by_did;
+	dlgb->get_dlg_by_ids = get_dlg_by_ids;
 	dlgb->get_dlg_by_callid = get_dlg_by_callid;
 	dlgb->send_indialog_request = send_indialog_request;
 

modules/dialog/dlg_hash.c

@@ -947,6 +947,12 @@ struct dlg_cell* get_dlg_by_did(str *did, int active_only)
 	return NULL;
 }
 
+struct dlg_cell* get_dlg_by_ids(unsigned int h_entry, unsigned int h_id, int active_only)
+{
+	return lookup_dlg(h_entry, h_id, active_only);
+}
+
+
 struct dlg_cell *get_dlg_by_dialog_id(str *dialog_id)
 {
 	struct dlg_cell *dlg = NULL;

modules/dialog/dlg_hash.h

@@ -425,6 +425,8 @@ struct dlg_cell* get_dlg_by_callid(const str *callid, int active_only);
 
 struct dlg_cell* get_dlg_by_did(str *did, int active_only);
 
+struct dlg_cell* get_dlg_by_ids(unsigned int h_entry, unsigned int h_id, int active_only);
+
 struct dlg_cell *get_dlg_by_dialog_id(str *dialog_id);
 
 int get_dlg_direction(void);

modules/dialog/dlg_load.h

@@ -33,6 +33,7 @@ typedef struct dlg_cell *(*get_dlg_f) (void);
 typedef str *(*get_dlg_did_f) (struct dlg_cell *dlg);
 typedef struct dlg_cell *(*get_dlg_by_callid_f) (const str *, int);
 typedef struct dlg_cell *(*get_dlg_by_did_f) (str *, int);
+typedef struct dlg_cell *(*get_dlg_by_ids_f) (unsigned int, unsigned int, int);
 typedef int (*match_dialog_f) (struct sip_msg *msg, int _seq_match_mode);
 typedef int (*get_direction_f) (void);
 
@@ -62,6 +63,7 @@ struct dlg_binds {
 	get_direction_f      get_direction;
 	get_dlg_did_f        get_dlg_did;
 	get_dlg_by_did_f     get_dlg_by_did;
+	get_dlg_by_ids_f     get_dlg_by_ids;
 	get_dlg_by_callid_f  get_dlg_by_callid;
 	send_indialog_req_f  send_indialog_request;