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