Symbol: IP_HL_A
usr/src/uts/common/inet/ipf/netinet/ip_compat.h
1787
# define IP_HL_A(x,y) (x)->ip_hl = ((y) & 0xf)
usr/src/uts/common/inet/ipf/netinet/ip_compat.h
732
# define IP_HL_A(x,y) (x)->ip_vhl |= ((y) & 0xf)