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DPATES / IPTables-IPv4-0.98 / include / linux / netfilter_ipv4 / ipt_tcpmss.h 
#ifndef _IPT_TCPMSS_MATCH_H
#define _IPT_TCPMSS_MATCH_H

struct ipt_tcpmss_match_info {
    u_int16_t mss_min, mss_max;
    u_int8_t invert;
};

#endif /*_IPT_TCPMSS_MATCH_H*/