try_buffer_write_u32
&& try_buffer_write_u32(packet, 0) /* TTL*/
&& try_buffer_write_u32(packet, serial) /* serial */
&& try_buffer_write_u32(packet, 3600) /* refresh*/
&& try_buffer_write_u32(packet, 600) /* retry */
&& try_buffer_write_u32(packet, 2147483646) /* expire */
&& try_buffer_write_u32(packet, 0) /* minimum */) {
&& try_buffer_write_u32(packet, 0) /* TTL*/
&& try_buffer_write_u32(packet, 0) /* TTL*/