HelenOS sources

OPB_TC            509 uspace/srv/net/dnsrsrv/dns_msg.c 	    (msg->tc ? BIT_V(uint16_t, OPB_TC) : 0) |
OPB_TC            607 uspace/srv/net/dnsrsrv/dns_msg.c 	msg->tc = BIT_RANGE_EXTRACT(uint16_t, OPB_TC, OPB_TC, hdr->opbits);