f0068c4a70
to something more recent than the ancient 1.2 release contained in 4.4. This code has the following advantages as compared to previous versions (culled from the README file for the SunOS release): - True multicast delivery - Configurable rate-limiting of forwarded multicast traffic on each physical interface or tunnel, using a token-bucket limiter. - Simplistic classification of packets for prioritized dropping. - Administrative scoping of multicast address ranges. - Faster detection of hosts leaving groups. - Support for multicast traceroute (code not yet available). - Support for RSVP, the Resource Reservation Protocol. What still needs to be done: - The multicast forwarder needs testing. - The multicast routing daemon needs to be ported. - Network interface drivers need to have the `#ifdef MULTICAST' goop ripped out of them. - The IGMP code should probably be bogon-tested. Some notes about the porting process: In some cases, the Berkeley people decided to incorporate functionality from later releases of the multicast code, but then had to do things differently. As a result, if you look at Deering's patches, and then look at our code, it is not always obvious whether the patch even applies. Let the reader beware. I ran ip_mroute.c through several passes of `unifdef' to get rid of useless grot, and to permanently enable the RSVP support, which we will include as standard. Ported by: Garrett Wollman Submitted by: Steve Deering and Ajit Thyagarajan (among others)
250 lines
8.2 KiB
C
250 lines
8.2 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1990, 1993
|
|
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)in.h 8.3 (Berkeley) 1/3/94
|
|
* $Id: in.h,v 1.3 1994/08/21 05:27:27 paul Exp $
|
|
*/
|
|
|
|
#ifndef _NETINET_IN_H_
|
|
#define _NETINET_IN_H_
|
|
|
|
/*
|
|
* Constants and structures defined by the internet system,
|
|
* Per RFC 790, September 1981, and numerous additions.
|
|
*/
|
|
|
|
/*
|
|
* Protocols
|
|
*/
|
|
#define IPPROTO_IP 0 /* dummy for IP */
|
|
#define IPPROTO_ICMP 1 /* control message protocol */
|
|
#define IPPROTO_IGMP 2 /* group mgmt protocol */
|
|
#define IPPROTO_GGP 3 /* gateway^2 (deprecated) */
|
|
#define IPPROTO_TCP 6 /* tcp */
|
|
#define IPPROTO_EGP 8 /* exterior gateway protocol */
|
|
#define IPPROTO_PUP 12 /* pup */
|
|
#define IPPROTO_UDP 17 /* user datagram protocol */
|
|
#define IPPROTO_IDP 22 /* xns idp */
|
|
#define IPPROTO_TP 29 /* tp-4 w/ class negotiation */
|
|
#define IPPROTO_RSVP 46 /* resource reservation */
|
|
#define IPPROTO_EON 80 /* ISO cnlp */
|
|
#define IPPROTO_ENCAP 98 /* encapsulation header */
|
|
|
|
#define IPPROTO_RAW 255 /* raw IP packet */
|
|
#define IPPROTO_MAX 256
|
|
|
|
|
|
/*
|
|
* Local port number conventions:
|
|
* Ports < IPPORT_RESERVED are reserved for
|
|
* privileged processes (e.g. root).
|
|
* Ports > IPPORT_USERRESERVED are reserved
|
|
* for servers, not necessarily privileged.
|
|
*/
|
|
#define IPPORT_RESERVED 1024
|
|
#define IPPORT_USERRESERVED 5000
|
|
|
|
/*
|
|
* Internet address (a structure for historical reasons)
|
|
*/
|
|
struct in_addr {
|
|
u_long s_addr;
|
|
};
|
|
|
|
/*
|
|
* Definitions of bits in internet address integers.
|
|
* On subnets, the decomposition of addresses to host and net parts
|
|
* is done according to subnet mask, not the masks here.
|
|
*/
|
|
#define IN_CLASSA(i) (((long)(i) & 0x80000000) == 0)
|
|
#define IN_CLASSA_NET 0xff000000
|
|
#define IN_CLASSA_NSHIFT 24
|
|
#define IN_CLASSA_HOST 0x00ffffff
|
|
#define IN_CLASSA_MAX 128
|
|
|
|
#define IN_CLASSB(i) (((long)(i) & 0xc0000000) == 0x80000000)
|
|
#define IN_CLASSB_NET 0xffff0000
|
|
#define IN_CLASSB_NSHIFT 16
|
|
#define IN_CLASSB_HOST 0x0000ffff
|
|
#define IN_CLASSB_MAX 65536
|
|
|
|
#define IN_CLASSC(i) (((long)(i) & 0xe0000000) == 0xc0000000)
|
|
#define IN_CLASSC_NET 0xffffff00
|
|
#define IN_CLASSC_NSHIFT 8
|
|
#define IN_CLASSC_HOST 0x000000ff
|
|
|
|
#define IN_CLASSD(i) (((long)(i) & 0xf0000000) == 0xe0000000)
|
|
#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
|
|
#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
|
|
#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
|
|
#define IN_MULTICAST(i) IN_CLASSD(i)
|
|
|
|
#define IN_EXPERIMENTAL(i) (((long)(i) & 0xf0000000) == 0xf0000000)
|
|
#define IN_BADCLASS(i) (((long)(i) & 0xf0000000) == 0xf0000000)
|
|
|
|
#define INADDR_ANY (u_long)0x00000000
|
|
#define INADDR_BROADCAST (u_long)0xffffffff /* must be masked */
|
|
#ifndef KERNEL
|
|
#define INADDR_NONE 0xffffffff /* -1 return */
|
|
#endif
|
|
|
|
#define INADDR_UNSPEC_GROUP (u_long)0xe0000000 /* 224.0.0.0 */
|
|
#define INADDR_ALLHOSTS_GROUP (u_long)0xe0000001 /* 224.0.0.1 */
|
|
#define INADDR_MAX_LOCAL_GROUP (u_long)0xe00000ff /* 224.0.0.255 */
|
|
|
|
#define IN_LOOPBACKNET 127 /* official! */
|
|
|
|
/*
|
|
* Socket address, internet style.
|
|
*/
|
|
struct sockaddr_in {
|
|
u_char sin_len;
|
|
u_char sin_family;
|
|
u_short sin_port;
|
|
struct in_addr sin_addr;
|
|
char sin_zero[8];
|
|
};
|
|
|
|
/*
|
|
* Structure used to describe IP options.
|
|
* Used to store options internally, to pass them to a process,
|
|
* or to restore options retrieved earlier.
|
|
* The ip_dst is used for the first-hop gateway when using a source route
|
|
* (this gets put into the header proper).
|
|
*/
|
|
struct ip_opts {
|
|
struct in_addr ip_dst; /* first hop, 0 w/o src rt */
|
|
char ip_opts[40]; /* actually variable in size */
|
|
};
|
|
|
|
/*
|
|
* Options for use with [gs]etsockopt at the IP level.
|
|
* First word of comment is data type; bool is stored in int.
|
|
*/
|
|
#define IP_OPTIONS 1 /* buf/ip_opts; set/get IP options */
|
|
#define IP_HDRINCL 2 /* int; header is included with data */
|
|
#define IP_TOS 3 /* int; IP type of service and preced. */
|
|
#define IP_TTL 4 /* int; IP time to live */
|
|
#define IP_RECVOPTS 5 /* bool; receive all IP opts w/dgram */
|
|
#define IP_RECVRETOPTS 6 /* bool; receive IP opts for response */
|
|
#define IP_RECVDSTADDR 7 /* bool; receive IP dst addr w/dgram */
|
|
#define IP_RETOPTS 8 /* ip_opts; set/get IP options */
|
|
#define IP_MULTICAST_IF 9 /* u_char; set/get IP multicast i/f */
|
|
#define IP_MULTICAST_TTL 10 /* u_char; set/get IP multicast ttl */
|
|
#define IP_MULTICAST_LOOP 11 /* u_char; set/get IP multicast loopback */
|
|
#define IP_ADD_MEMBERSHIP 12 /* ip_mreq; add an IP group membership */
|
|
#define IP_DROP_MEMBERSHIP 13 /* ip_mreq; drop an IP group membership */
|
|
#define IP_MULTICAST_VIF 14 /* set/get IP mcast virt. iface */
|
|
#define IP_RSVP_ON 15 /* enable RSVP in kernel */
|
|
#define IP_RSVP_OFF 16 /* disable RSVP in kernel */
|
|
|
|
|
|
/*
|
|
* Defaults and limits for options
|
|
*/
|
|
#define IP_DEFAULT_MULTICAST_TTL 1 /* normally limit m'casts to 1 hop */
|
|
#define IP_DEFAULT_MULTICAST_LOOP 1 /* normally hear sends if a member */
|
|
#define IP_MAX_MEMBERSHIPS 20 /* per socket; must fit in one mbuf */
|
|
|
|
/*
|
|
* Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP.
|
|
*/
|
|
struct ip_mreq {
|
|
struct in_addr imr_multiaddr; /* IP multicast address of group */
|
|
struct in_addr imr_interface; /* local IP address of interface */
|
|
};
|
|
|
|
/*
|
|
* Definitions for inet sysctl operations.
|
|
*
|
|
* Third level is protocol number.
|
|
* Fourth level is desired variable within that protocol.
|
|
*/
|
|
#define IPPROTO_MAXID (IPPROTO_IDP + 1) /* don't list to IPPROTO_MAX */
|
|
|
|
#define CTL_IPPROTO_NAMES { \
|
|
{ "ip", CTLTYPE_NODE }, \
|
|
{ "icmp", CTLTYPE_NODE }, \
|
|
{ "igmp", CTLTYPE_NODE }, \
|
|
{ "ggp", CTLTYPE_NODE }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ "tcp", CTLTYPE_NODE }, \
|
|
{ 0, 0 }, \
|
|
{ "egp", CTLTYPE_NODE }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ "pup", CTLTYPE_NODE }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ "udp", CTLTYPE_NODE }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ 0, 0 }, \
|
|
{ "idp", CTLTYPE_NODE }, \
|
|
}
|
|
|
|
/*
|
|
* Names for IP sysctl objects
|
|
*/
|
|
#define IPCTL_FORWARDING 1 /* act as router */
|
|
#define IPCTL_SENDREDIRECTS 2 /* may send redirects when forwarding */
|
|
#define IPCTL_DEFTTL 3 /* default TTL */
|
|
#ifdef notyet
|
|
#define IPCTL_DEFMTU 4 /* default MTU */
|
|
#endif
|
|
#define IPCTL_MAXID 5
|
|
|
|
#define IPCTL_NAMES { \
|
|
{ 0, 0 }, \
|
|
{ "forwarding", CTLTYPE_INT }, \
|
|
{ "redirect", CTLTYPE_INT }, \
|
|
{ "ttl", CTLTYPE_INT }, \
|
|
{ "mtu", CTLTYPE_INT }, \
|
|
}
|
|
|
|
|
|
#ifdef KERNEL
|
|
int in_broadcast __P((struct in_addr, struct ifnet *));
|
|
int in_canforward __P((struct in_addr));
|
|
int in_cksum __P((struct mbuf *, int));
|
|
int in_localaddr __P((struct in_addr));
|
|
u_long in_netof __P((struct in_addr));
|
|
void in_socktrim __P((struct sockaddr_in *));
|
|
#endif
|
|
|
|
#endif
|