HelenOS sources

ICMP_TOS          110 uspace/srv/net/inetsrv/icmp.c 	rdgram.tos = ICMP_TOS;
ICMP_TOS          168 uspace/srv/net/inetsrv/icmp.c 	dgram.tos = ICMP_TOS;
ICMP_TOS           78 uspace/srv/net/inetsrv/inetping.c 	return inet_get_srcaddr(remote, ICMP_TOS, local);