CHECK_LENGTH
CHECK_LENGTH(cblen, i + 2);
CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn) + 2 + len);
CHECK_LENGTH(*len, 0);
#define CHECK_RBUFLEN(len) { CHECK_LENGTH(rblen, len); rblen -= len; }
#define CHECK_ACTLEN CHECK_LENGTH(ablen, action->len)
#define CHECK_CMDLEN CHECK_LENGTH(cblen, F_LEN((ipfw_insn *)cmd))
CHECK_LENGTH(cblen, (int)F_INSN_SIZE(ipfw_insn_icmp6));
CHECK_LENGTH(cblen,
CHECK_LENGTH(cblen,
CHECK_LENGTH(1);
CHECK_LENGTH(2);
CHECK_LENGTH(4);
CHECK_LENGTH(3);