IPV6_FW_IP6OPT_AH
if (chain->fw_ip6opt & IPV6_FW_IP6OPT_AH) PRINTOPT("ah");
if (chain->fw_ip6nopt & IPV6_FW_IP6OPT_AH) PRINTOPT("!ah");
if (!strncmp(p,"ah",strlen(p))) *d |= IPV6_FW_IP6OPT_AH;
opts &= ~IPV6_FW_IP6OPT_AH;
nopts &= ~IPV6_FW_IP6OPT_AH;