ipfw_insn_sa6
const ipfw_insn_sa6 *sa6;
ipfw_insn_sa6 *p = (ipfw_insn_sa6 *)action;
action->len = F_INSN_SIZE(ipfw_insn_sa6);
sin6 = &(((ipfw_insn_sa6 *)cmd)->sa);
if (cmdlen != F_INSN_SIZE(ipfw_insn_sa6))