UDP_CHECKSUM_INIT 141 uspace/srv/net/udp/pdu.c cs_phdr = udp_checksum_calc(UDP_CHECKSUM_INIT, (void *) &phdr, UDP_CHECKSUM_INIT 145 uspace/srv/net/udp/pdu.c cs_phdr = udp_checksum_calc(UDP_CHECKSUM_INIT, (void *) &phdr6,HelenOS homepage, sources at GitHub