+/* io.c */
+LDAP_F Sockbuf *lber_pvt_sb_alloc LDAP_P(( void ));
+LDAP_F Sockbuf *lber_pvt_sb_alloc_fd LDAP_P(( int ));
+LDAP_F Sockbuf *lber_pvt_sb_alloc_fd LDAP_P(( int ));
+LDAP_F void lber_pvt_sb_free LDAP_P(( Sockbuf * ));
+LDAP_F int lber_pvt_sb_get_option LDAP_P(( Sockbuf *, int, void * ));
+LDAP_F int lber_pvt_sb_set_option LDAP_P(( Sockbuf *, int, void * ));
+