Symbol: IPV6_FLOWLABEL_MASK
usr/src/uts/common/inet/ipf/netinet/ip_compat.h
2391
# define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
usr/src/uts/common/inet/ipf/netinet/ip_compat.h
2394
# define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */