+void sal_exosip_in_subscription_closed(Sal *sal, eXosip_event_t *ev);
+SalOp * sal_find_out_subscribe(Sal *sal, int sid);
+SalOp * sal_find_in_subscribe(Sal *sal, int nid);
+void sal_exosip_fix_route(SalOp *op);
+void sal_exosip_add_custom_headers(osip_message_t *msg, SalCustomHeader *ch);
+SalCustomHeader * sal_exosip_get_custom_headers(osip_message_t *msg);
+
+void _osip_list_set_empty(osip_list_t *l, void (*freefunc)(void*));
+
+void sal_message_add_route(osip_message_t *msg, const char *proxy);