5493f188c7
parentheses in return statements.
Cosmetic: don't open-code TAILQ_FOREACH().
Cosmetic: change types of variables to avoid oodles of casts: in
in6_src.c, avoid casts by changing several route_in6 pointers
to struct route pointers. Remove unnecessary casts to caddr_t
elsewhere.
Pave the way for eliminating address family-specific route caches:
soon, struct route will not embed a sockaddr, but it will hold
a reference to an external sockaddr, instead. We will set the
destination sockaddr using rtcache_setdst(). (I created a stub
for it, but it isn't used anywhere, yet.) rtcache_free() will
free the sockaddr. I have extracted from rtcache_free() a helper
subroutine, rtcache_clear(). rtcache_clear() will "forget" a
cached route, but it will not forget the destination by releasing
the sockaddr. I use rtcache_clear() instead of rtcache_free()
in rtcache_update(), because rtcache_update() is not supposed
to forget the destination.
Constify:
1 Introduce const accessor for route->ro_dst, rtcache_getdst().
2 Constify the 'dst' argument to ifnet->if_output(). This
led me to constify a lot of code called by output routines.
3 Constify the sockaddr argument to protosw->pr_ctlinput. This
led me to constify a lot of code called by ctlinput routines.
4 Introduce const macros for converting from a generic sockaddr
to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
satocsin, et cetera.
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/* $NetBSD: if_gif.h,v 1.15 2007/02/17 22:34:08 dyoung Exp $ */
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/* $KAME: if_gif.h,v 1.23 2001/07/27 09:21:42 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* if_gif.h
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*/
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#ifndef _NET_IF_GIF_H_
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#define _NET_IF_GIF_H_
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#include <sys/queue.h>
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#if defined(_KERNEL) && !defined(_LKM)
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#include "opt_inet.h"
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#endif
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#include <netinet/in.h>
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/* xxx sigh, why route have struct route instead of pointer? */
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struct encaptab;
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struct gif_softc {
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struct ifnet gif_if; /* common area - must be at the top */
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struct sockaddr *gif_psrc; /* Physical src addr */
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struct sockaddr *gif_pdst; /* Physical dst addr */
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union {
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struct route gifscr_ro; /* xxx */
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#ifdef INET6
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struct route_in6 gifscr_ro6; /* xxx */
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#endif
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} gifsc_gifscr;
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int gif_flags;
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const struct encaptab *encap_cookie4;
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const struct encaptab *encap_cookie6;
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LIST_ENTRY(gif_softc) gif_list; /* list of all gifs */
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#ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
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void *gif_si; /* softintr handle */
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#endif
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};
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#define GIF_ROUTE_TTL 10
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#define gif_ro gifsc_gifscr.gifscr_ro
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#ifdef INET6
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#define gif_ro6 gifsc_gifscr.gifscr_ro6
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#endif
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#define GIF_MTU (1280) /* Default MTU */
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#define GIF_MTU_MIN (1280) /* Minimum MTU */
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#define GIF_MTU_MAX (8192) /* Maximum MTU */
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/* Prototypes */
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void gifattach0(struct gif_softc *);
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void gif_input(struct mbuf *, int, struct ifnet *);
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int gif_output(struct ifnet *, struct mbuf *,
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const struct sockaddr *, struct rtentry *);
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int gif_ioctl(struct ifnet *, u_long, caddr_t);
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int gif_set_tunnel(struct ifnet *, struct sockaddr *, struct sockaddr *);
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void gif_delete_tunnel(struct ifnet *);
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#ifdef GIF_ENCAPCHECK
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int gif_encapcheck(struct mbuf *, int, int, void *);
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#endif
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#endif /* !_NET_IF_GIF_H_ */
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