71498f308b
and protocol-independent host mode multicast. The code is written to accomodate IPv6, IGMPv3 and MLDv2 with only a little additional work. This change only pertains to FreeBSD's use as a multicast end-station and does not concern multicast routing; for an IGMPv3/MLDv2 router implementation, consider the XORP project. The work is based on Wilbert de Graaf's IGMPv3 code drop for FreeBSD 4.6, which is available at: http://www.kloosterhof.com/wilbert/igmpv3.html Summary * IPv4 multicast socket processing is now moved out of ip_output.c into a new module, in_mcast.c. * The in_mcast.c module implements the IPv4 legacy any-source API in terms of the protocol-independent source-specific API. * Source filters are lazy allocated as the common case does not use them. They are part of per inpcb state and are covered by the inpcb lock. * struct ip_mreqn is now supported to allow applications to specify multicast joins by interface index in the legacy IPv4 any-source API. * In UDP, an incoming multicast datagram only requires that the source port matches the 4-tuple if the socket was already bound by source port. An unbound socket SHOULD be able to receive multicasts sent from an ephemeral source port. * The UDP socket multicast filter mode defaults to exclusive, that is, sources present in the per-socket list will be blocked from delivery. * The RFC 3678 userland functions have been added to libc: setsourcefilter, getsourcefilter, setipv4sourcefilter, getipv4sourcefilter. * Definitions for IGMPv3 are merged but not yet used. * struct sockaddr_storage is now referenced from <netinet/in.h>. It is therefore defined there if not already declared in the same way as for the C99 types. * The RFC 1724 hack (specify 0.0.0.0/8 addresses to IP_MULTICAST_IF which are then interpreted as interface indexes) is now deprecated. * A patch for the Rhyolite.com routed in the FreeBSD base system is available in the -net archives. This only affects individuals running RIPv1 or RIPv2 via point-to-point and/or unnumbered interfaces. * Make IPv6 detach path similar to IPv4's in code flow; functionally same. * Bump __FreeBSD_version to 700048; see UPDATING. This work was financially supported by another FreeBSD committer. Obtained from: p4://bms_netdev Submitted by: Wilbert de Graaf (original work) Reviewed by: rwatson (locking), silence from fenner, net@ (but with encouragement)
112 lines
4.0 KiB
C
112 lines
4.0 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California.
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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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* 4. 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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* $FreeBSD$
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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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};
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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_long udps_ipackets; /* total input packets */
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u_long udps_hdrops; /* packet shorter than header */
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u_long udps_badsum; /* checksum error */
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u_long udps_nosum; /* no checksum */
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u_long udps_badlen; /* data length larger than packet */
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u_long udps_noport; /* no socket on port */
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u_long udps_noportbcast; /* of above, arrived as broadcast */
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u_long udps_fullsock; /* not delivered, input socket full */
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u_long udpps_pcbcachemiss; /* input packets missing pcb cache */
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u_long udpps_pcbhashmiss; /* input packets not for hashed pcb */
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/* output statistics: */
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u_long udps_opackets; /* total output packets */
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u_long udps_fastout; /* output packets on fast path */
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/* of no socket on port, arrived as multicast */
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u_long udps_noportmcast;
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u_long udps_filtermcast; /* blocked by multicast filter */
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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_STATS 2 /* statistics (read-only) */
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#define UDPCTL_MAXDGRAM 3 /* max datagram size */
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#define UDPCTL_RECVSPACE 4 /* default receive buffer space */
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#define UDPCTL_PCBLIST 5 /* list of PCBs for UDP sockets */
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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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{ "stats", CTLTYPE_STRUCT }, \
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{ "maxdgram", CTLTYPE_INT }, \
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{ "recvspace", CTLTYPE_INT }, \
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{ "pcblist", CTLTYPE_STRUCT }, \
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}
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#ifdef _KERNEL
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SYSCTL_DECL(_net_inet_udp);
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extern struct pr_usrreqs udp_usrreqs;
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extern struct inpcbhead udb;
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extern struct inpcbinfo udbinfo;
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extern u_long udp_sendspace;
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extern u_long udp_recvspace;
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extern struct udpstat udpstat;
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extern int udp_log_in_vain;
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void udp_ctlinput(int, struct sockaddr *, void *);
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void udp_init(void);
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void udp_input(struct mbuf *, int);
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struct inpcb *udp_notify(struct inpcb *inp, int errno);
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int udp_shutdown(struct socket *so);
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#endif
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#endif
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