ip_options.h

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/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1982, 1986, 1993
 *      The Regents of the University of California.
 * Copyright (c) 2005 Andre Oppermann, Internet Business Solutions AG.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
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 * $FreeBSD$
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#ifndef _NETINET_IP_OPTIONS_H_
#define _NETINET_IP_OPTIONS_H_
 
struct ipoptrt {
        struct  in_addr dst;                    /* final destination */
        char    nop;                            /* one NOP to align */
        char    srcopt[IPOPT_OFFSET + 1];       /* OPTVAL, OLEN and OFFSET */
        struct  in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
};
 
struct ipopt_tag {
        struct  m_tag tag;                      /* m_tag */
        int     ip_nhops;
        struct  ipoptrt ip_srcrt;
};
 
VNET_DECLARE(int, ip_doopts);           /* process or ignore IP options */
#define V_ip_doopts     VNET(ip_doopts)
 
int              ip_checkrouteralert(struct mbuf *);
int              ip_dooptions(struct mbuf *, int);
struct mbuf     *ip_insertoptions(struct mbuf *, struct mbuf *, int *);
int              ip_optcopy(struct ip *, struct ip *);
int              ip_pcbopts(struct inpcb *, int, struct mbuf *);
void             ip_stripoptions(struct mbuf *);
struct mbuf     *ip_srcroute(struct mbuf *);
 
#endif /* !_NETINET_IP_OPTIONS_H_ */