ip6o_len         1135 net/pf_norm.c  				if (ooff + sizeof(opt) + opt.ip6o_len > optend)
ip6o_len         1157 net/pf_norm.c  				ooff += sizeof(opt) + opt.ip6o_len;
ip6o_len          174 netinet/ip6.h  	u_int8_t ip6o_len;