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.
111 lines
4.0 KiB
C
111 lines
4.0 KiB
C
/* $NetBSD: udp_var.h,v 1.32 2007/02/17 22:34:12 dyoung Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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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* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_UDP_VAR_H_
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#define _NETINET_UDP_VAR_H_
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/*
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* UDP kernel structures and variables.
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*/
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struct udpiphdr {
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struct ipovly ui_i; /* overlaid ip structure */
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struct udphdr ui_u; /* udp header */
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} __attribute__((__packed__));
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#define ui_x1 ui_i.ih_x1
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#define ui_pr ui_i.ih_pr
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#define ui_len ui_i.ih_len
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#define ui_src ui_i.ih_src
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#define ui_dst ui_i.ih_dst
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#define ui_sport ui_u.uh_sport
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#define ui_dport ui_u.uh_dport
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#define ui_ulen ui_u.uh_ulen
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#define ui_sum ui_u.uh_sum
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struct udpstat {
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/* input statistics: */
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u_quad_t udps_ipackets; /* total input packets */
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u_quad_t udps_hdrops; /* packet shorter than header */
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u_quad_t udps_badsum; /* checksum error */
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u_quad_t udps_badlen; /* data length larger than packet */
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u_quad_t udps_noport; /* no socket on port */
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u_quad_t udps_noportbcast; /* of above, arrived as broadcast */
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u_quad_t udps_fullsock; /* not delivered, input socket full */
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u_quad_t udps_pcbhashmiss; /* input packets missing pcb hash */
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/* output statistics: */
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u_quad_t udps_opackets; /* total output packets */
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};
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/*
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* Names for UDP sysctl objects
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*/
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#define UDPCTL_CHECKSUM 1 /* checksum UDP packets */
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#define UDPCTL_SENDSPACE 2 /* default send buffer */
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#define UDPCTL_RECVSPACE 3 /* default recv buffer */
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#define UDPCTL_LOOPBACKCKSUM 4 /* do UDP checksum on loopback */
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#define UDPCTL_STATS 5 /* UDP statistics */
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#define UDPCTL_MAXID 6
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#define UDPCTL_NAMES { \
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{ 0, 0 }, \
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{ "checksum", CTLTYPE_INT }, \
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{ "sendspace", CTLTYPE_INT }, \
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{ "recvspace", CTLTYPE_INT }, \
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{ "do_loopback_cksum", CTLTYPE_INT }, \
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{ "stats", CTLTYPE_STRUCT }, \
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}
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#ifdef _KERNEL
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extern struct inpcbtable udbtable;
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extern struct udpstat udpstat;
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#ifdef __NO_STRICT_ALIGNMENT
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#define UDP_HDR_ALIGNED_P(uh) 1
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#else
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#define UDP_HDR_ALIGNED_P(uh) ((((vaddr_t) (uh)) & 3) == 0)
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#endif
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void *udp_ctlinput(int, const struct sockaddr *, void *);
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int udp_ctloutput(int, struct socket *, int, int, struct mbuf **);
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void udp_init(void);
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void udp_input(struct mbuf *, ...);
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int udp_output(struct mbuf *, ...);
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int udp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
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int udp_usrreq(struct socket *,
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int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
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int udp_input_checksum(int af, struct mbuf *, const struct udphdr *, int,
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int);
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#endif
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#endif /* !_NETINET_UDP_VAR_H_ */
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