1690 lines
40 KiB
C
1690 lines
40 KiB
C
/* $NetBSD: ip6_mroute.c,v 1.3 1999/07/03 21:30:18 thorpej Exp $ */
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/*
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* Copyright (C) 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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/* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */
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/*
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* IP multicast forwarding procedures
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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* Modified by Mark J. Steiglitz, Stanford, May, 1991
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* Modified by Van Jacobson, LBL, January 1993
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* Modified by Ajit Thyagarajan, PARC, August 1993
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* Modified by Bill Fenenr, PARC, April 1994
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*
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* MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
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*/
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#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
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#include "opt_inet.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/protosw.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#if !defined(__FreeBSD__) || __FreeBSD__ < 3
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#include <sys/ioctl.h>
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#endif
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#include <sys/syslog.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/raw_cb.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet6/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/ip6_mroute.h>
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#include <netinet6/pim6.h>
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#include <netinet6/pim6_var.h>
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#define M_HASCL(m) ((m)->m_flags & M_EXT)
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static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *));
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static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *));
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static int set_pim6 __P((int *));
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static int get_pim6 __P((struct mbuf *));
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static int socket_send __P((struct socket *, struct mbuf *,
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struct sockaddr_in6 *));
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static int register_send __P((struct ip6_hdr *, struct mif6 *,
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struct mbuf *));
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/*
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* Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
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* except for netstat or debugging purposes.
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*/
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struct socket *ip6_mrouter = NULL;
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int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
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struct mrt6stat mrt6stat;
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#define NO_RTE_FOUND 0x1
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#define RTE_FOUND 0x2
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struct mf6c *mf6ctable[MF6CTBLSIZ];
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u_char nexpire[MF6CTBLSIZ];
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static struct mif6 mif6table[MAXMIFS];
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#ifdef MRT6DEBUG
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u_int mrt6debug = 0; /* debug level */
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#define DEBUG_MFC 0x02
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#define DEBUG_FORWARD 0x04
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#define DEBUG_EXPIRE 0x08
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#define DEBUG_XMIT 0x10
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#define DEBUG_REG 0x20
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#define DEBUG_PIM 0x40
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#endif
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static void expire_upcalls __P((void *));
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#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
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#define UPCALL_EXPIRE 6 /* number of timeouts */
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#ifdef INET
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#ifdef MROUTING
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extern struct socket *ip_mrouter;
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#endif
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#endif
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/*
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* 'Interfaces' associated with decapsulator (so we can tell
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* packets that went through it from ones that get reflected
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* by a broken gateway). These interfaces are never linked into
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* the system ifnet list & no routes point to them. I.e., packets
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* can't be sent this way. They only exist as a placeholder for
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* multicast source verification.
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*/
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struct ifnet multicast_register_if;
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#define ENCAP_HOPS 64
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/*
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* Private variables.
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*/
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static mifi_t nummifs = 0;
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static mifi_t reg_mif_num = (mifi_t)-1;
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static struct pim6stat pim6stat;
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/*
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* one-back cache used by ipip_input to locate a tunnel's mif
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* given a datagram's src ip address.
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*/
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static int pim6;
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/*
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* Hash function for a source, group entry
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*/
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#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
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(a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
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(g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
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(g).s6_addr32[2] ^ (g).s6_addr32[3])
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/*
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* Find a route for a given origin IPv6 address and Multicast group address.
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* Quality of service parameter to be added in the future!!!
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*/
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#define MF6CFIND(o, g, rt) { \
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register struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
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rt = NULL; \
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mrt6stat.mrt6s_mfc_lookups++; \
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while (_rt) { \
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if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
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IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
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(_rt->mf6c_stall == NULL)) { \
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rt = _rt; \
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break; \
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} \
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_rt = _rt->mf6c_next; \
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} \
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if (rt == NULL) { \
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mrt6stat.mrt6s_mfc_misses++; \
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} \
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}
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/*
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* Macros to compute elapsed time efficiently
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* Borrowed from Van Jacobson's scheduling code
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*/
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#define TV_DELTA(a, b, delta) { \
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register int xxs; \
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\
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delta = (a).tv_usec - (b).tv_usec; \
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if ((xxs = (a).tv_sec - (b).tv_sec)) { \
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switch (xxs) { \
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case 2: \
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delta += 1000000; \
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/* fall through */ \
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case 1: \
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delta += 1000000; \
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break; \
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default: \
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delta += (1000000 * xxs); \
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} \
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} \
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}
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#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
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(a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
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#ifdef UPCALL_TIMING
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u_long upcall_data[51];
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static void collate();
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#endif /* UPCALL_TIMING */
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static int get_sg_cnt __P((struct sioc_sg_req6 *));
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static int get_mif6_cnt __P((struct sioc_mif_req6 *));
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static int ip6_mrouter_init __P((struct socket *, struct mbuf *));
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static int add_m6if __P((struct mif6ctl *));
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static int del_m6if __P((mifi_t *));
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static int add_m6fc __P((struct mf6cctl *));
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static int del_m6fc __P((struct mf6cctl *));
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/*
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* Handle MRT setsockopt commands to modify the multicast routing tables.
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*/
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int
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ip6_mrouter_set(cmd, so, m)
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int cmd;
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struct socket *so;
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struct mbuf *m;
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{
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if (cmd != MRT6_INIT && so != ip6_mrouter)
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return EACCES;
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switch (cmd) {
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case MRT6_INIT: return ip6_mrouter_init(so, m);
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case MRT6_DONE: return ip6_mrouter_done();
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case MRT6_ADD_MIF: return add_m6if(mtod(m, struct mif6ctl *));
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case MRT6_DEL_MIF: return del_m6if(mtod(m, mifi_t *));
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case MRT6_ADD_MFC: return add_m6fc(mtod(m, struct mf6cctl *));
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case MRT6_DEL_MFC: return del_m6fc(mtod(m, struct mf6cctl *));
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case MRT6_PIM: return set_pim6(mtod(m, int *));
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default: return EOPNOTSUPP;
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}
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}
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/*
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* Handle MRT getsockopt commands
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*/
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int
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ip6_mrouter_get(cmd, so, m)
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int cmd;
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struct socket *so;
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struct mbuf **m;
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{
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struct mbuf *mb;
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if (so != ip6_mrouter) return EACCES;
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*m = mb = m_get(M_WAIT, MT_SOOPTS);
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switch (cmd) {
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case MRT6_PIM: return get_pim6(mb);
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default:
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m_free(mb);
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return EOPNOTSUPP;
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}
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}
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/*
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* Handle ioctl commands to obtain information from the cache
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*/
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int
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mrt6_ioctl(cmd, data)
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int cmd;
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caddr_t data;
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{
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int error = 0;
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switch (cmd) {
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case SIOCGETSGCNT_IN6:
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return(get_sg_cnt((struct sioc_sg_req6 *)data));
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break; /* for safety */
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case SIOCGETMIFCNT_IN6:
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return(get_mif6_cnt((struct sioc_mif_req6 *)data));
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break; /* for safety */
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default:
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return (EINVAL);
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break;
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}
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return error;
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}
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/*
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* returns the packet, byte, rpf-failure count for the source group provided
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*/
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static int
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get_sg_cnt(req)
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register struct sioc_sg_req6 *req;
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{
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register struct mf6c *rt;
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int s;
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s = splnet();
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MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
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splx(s);
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if (rt != NULL) {
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req->pktcnt = rt->mf6c_pkt_cnt;
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req->bytecnt = rt->mf6c_byte_cnt;
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req->wrong_if = rt->mf6c_wrong_if;
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} else
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return(ESRCH);
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#if 0
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req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
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#endif
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return 0;
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}
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/*
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* returns the input and output packet and byte counts on the mif provided
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*/
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static int
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get_mif6_cnt(req)
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register struct sioc_mif_req6 *req;
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{
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register mifi_t mifi = req->mifi;
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if (mifi >= nummifs)
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return EINVAL;
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req->icount = mif6table[mifi].m6_pkt_in;
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req->ocount = mif6table[mifi].m6_pkt_out;
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req->ibytes = mif6table[mifi].m6_bytes_in;
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req->obytes = mif6table[mifi].m6_bytes_out;
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return 0;
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}
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/*
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* Get PIM processiong global
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*/
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static int
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get_pim6(m)
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struct mbuf *m;
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{
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int *i;
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i = mtod(m, int *);
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*i = pim6;
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return 0;
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}
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static int
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set_pim6(i)
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int *i;
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{
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if ((*i != 1) && (*i != 0))
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return EINVAL;
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pim6 = *i;
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return 0;
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}
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/*
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* Enable multicast routing
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*/
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static int
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ip6_mrouter_init(so, m)
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struct socket *so;
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struct mbuf *m;
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{
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int *v;
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#ifdef MRT6DEBUG
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if (mrt6debug)
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log(LOG_DEBUG,
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"ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
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so->so_type, so->so_proto->pr_protocol);
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#endif
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if (so->so_type != SOCK_RAW ||
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so->so_proto->pr_protocol != IPPROTO_ICMPV6)
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return EOPNOTSUPP;
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if (!m || (m->m_len != sizeof(int *)))
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return ENOPROTOOPT;
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v = mtod(m, int *);
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if (*v != 1)
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return ENOPROTOOPT;
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if (ip6_mrouter != NULL) return EADDRINUSE;
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ip6_mrouter = so;
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bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
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bzero((caddr_t)nexpire, sizeof(nexpire));
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pim6 = 0;/* used for stubbing out/in pim stuff */
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timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
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#ifdef MRT6DEBUG
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if (mrt6debug)
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log(LOG_DEBUG, "ip6_mrouter_init\n");
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#endif
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return 0;
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}
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/*
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* Disable multicast routing
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*/
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int
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ip6_mrouter_done()
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{
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mifi_t mifi;
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int i;
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struct ifnet *ifp;
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struct in6_ifreq ifr;
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struct mf6c *rt;
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struct rtdetq *rte;
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int s;
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s = splnet();
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/*
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* For each phyint in use, disable promiscuous reception of all IPv6
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* multicasts.
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*/
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#ifdef INET
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#ifdef MROUTING
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/*
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* If there is still IPv4 multicast routing daemon,
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* we remain interfaces to receive all muliticasted packets.
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* XXX: there may be an interface in which the IPv4 multicast
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* daemon is not interested...
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*/
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if (!ip_mrouter)
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#endif
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#endif
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{
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for (mifi = 0; mifi < nummifs; mifi++) {
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if (mif6table[mifi].m6_ifp &&
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!(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
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ifr.ifr_addr.sin6_family = AF_INET6;
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ifr.ifr_addr.sin6_addr= in6addr_any;
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ifp = mif6table[mifi].m6_ifp;
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(*ifp->if_ioctl)(ifp, SIOCDELMULTI,
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(caddr_t)&ifr);
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}
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}
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}
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#ifdef notyet
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bzero((caddr_t)qtable, sizeof(qtable));
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bzero((caddr_t)tbftable, sizeof(tbftable));
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#endif
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bzero((caddr_t)mif6table, sizeof(mif6table));
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nummifs = 0;
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pim6 = 0; /* used to stub out/in pim specific code */
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untimeout(expire_upcalls, (caddr_t)NULL);
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/*
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* Free all multicast forwarding cache entries.
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*/
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for (i = 0; i < MF6CTBLSIZ; i++) {
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rt = mf6ctable[i];
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while (rt) {
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struct mf6c *frt;
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for (rte = rt->mf6c_stall; rte != NULL; ) {
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struct rtdetq *n = rte->next;
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m_free(rte->m);
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free(rte, M_MRTABLE);
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rte = n;
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}
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frt = rt;
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rt = rt->mf6c_next;
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free(frt, M_MRTABLE);
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}
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}
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bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
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/*
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* Reset de-encapsulation cache
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*/
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reg_mif_num = -1;
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ip6_mrouter = NULL;
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splx(s);
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#ifdef MRT6DEBUG
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if (mrt6debug)
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log(LOG_DEBUG, "ip6_mrouter_done\n");
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#endif
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return 0;
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}
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static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
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|
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/*
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* Add a mif to the mif table
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*/
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static int
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add_m6if(mifcp)
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register struct mif6ctl *mifcp;
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{
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register struct mif6 *mifp;
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struct ifnet *ifp;
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struct in6_ifreq ifr;
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|
int error, s;
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#ifdef notyet
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|
struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
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|
#endif
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|
|
if (mifcp->mif6c_mifi >= MAXMIFS)
|
|
return EINVAL;
|
|
mifp = mif6table + mifcp->mif6c_mifi;
|
|
if (mifp->m6_ifp)
|
|
return EADDRINUSE; /* XXX: is it appropriate? */
|
|
if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index)
|
|
return ENXIO;
|
|
ifp = ifindex2ifnet[mifcp->mif6c_pifi];
|
|
|
|
if (mifcp->mif6c_flags & MIFF_REGISTER) {
|
|
if (reg_mif_num == (mifi_t)-1) {
|
|
#ifdef __NetBSD__
|
|
strcpy(multicast_register_if.if_xname,
|
|
"register_mif"); /* XXX */
|
|
#else
|
|
multicast_register_if.if_name = "register_mif";
|
|
#endif
|
|
multicast_register_if.if_flags |= IFF_LOOPBACK;
|
|
multicast_register_if.if_index = mifcp->mif6c_mifi;
|
|
reg_mif_num = mifcp->mif6c_mifi;
|
|
}
|
|
|
|
ifp = &multicast_register_if;
|
|
|
|
} /* if REGISTER */
|
|
else {
|
|
/* Make sure the interface supports multicast */
|
|
if ((ifp->if_flags & IFF_MULTICAST) == 0)
|
|
return EOPNOTSUPP;
|
|
|
|
/*
|
|
* Enable promiscuous reception of all IPv6 multicasts
|
|
* from the if
|
|
*/
|
|
ifr.ifr_addr.sin6_family = AF_INET6;
|
|
ifr.ifr_addr.sin6_addr = in6addr_any;
|
|
s = splnet();
|
|
error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr);
|
|
splx(s);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
s = splnet();
|
|
mifp->m6_flags = mifcp->mif6c_flags;
|
|
mifp->m6_ifp = ifp;
|
|
#ifdef notyet
|
|
/* scaling up here allows division by 1024 in critical code */
|
|
mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
|
|
#endif
|
|
/* initialize per mif pkt counters */
|
|
mifp->m6_pkt_in = 0;
|
|
mifp->m6_pkt_out = 0;
|
|
mifp->m6_bytes_in = 0;
|
|
mifp->m6_bytes_out = 0;
|
|
splx(s);
|
|
|
|
/* Adjust nummifs up if the mifi is higher than nummifs */
|
|
if (nummifs <= mifcp->mif6c_mifi)
|
|
nummifs = mifcp->mif6c_mifi + 1;
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug)
|
|
log(LOG_DEBUG,
|
|
"add_mif #%d, phyint %s%d\n",
|
|
mifcp->mif6c_mifi,
|
|
ifp->if_name, ifp->if_unit);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Delete a mif from the mif table
|
|
*/
|
|
static int
|
|
del_m6if(mifip)
|
|
mifi_t *mifip;
|
|
{
|
|
register struct mif6 *mifp = mif6table + *mifip;
|
|
register mifi_t mifi;
|
|
struct ifnet *ifp;
|
|
struct in6_ifreq ifr;
|
|
int s;
|
|
|
|
if (*mifip >= nummifs)
|
|
return EINVAL;
|
|
if (mifp->m6_ifp == NULL)
|
|
return EINVAL;
|
|
|
|
s = splnet();
|
|
|
|
if (!(mifp->m6_flags & MIFF_REGISTER)) {
|
|
/*
|
|
* XXX: what if there is yet IPv4 multicast daemon
|
|
* using the interface?
|
|
*/
|
|
ifr.ifr_addr.sin6_family = AF_INET6;
|
|
ifr.ifr_addr.sin6_addr = in6addr_any;
|
|
ifp = mifp->m6_ifp;
|
|
(*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr);
|
|
}
|
|
|
|
#ifdef notyet
|
|
bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip]));
|
|
bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
|
|
#endif
|
|
bzero((caddr_t)mifp, sizeof (*mifp));
|
|
|
|
/* Adjust nummifs down */
|
|
for (mifi = nummifs; mifi > 0; mifi--)
|
|
if (mif6table[mifi - 1].m6_ifp)
|
|
break;
|
|
nummifs = mifi;
|
|
|
|
splx(s);
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug)
|
|
log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Add an mfc entry
|
|
*/
|
|
static int
|
|
add_m6fc(mfccp)
|
|
struct mf6cctl *mfccp;
|
|
{
|
|
struct mf6c *rt;
|
|
u_long hash;
|
|
struct rtdetq *rte;
|
|
register u_short nstl;
|
|
int s;
|
|
|
|
MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
|
|
mfccp->mf6cc_mcastgrp.sin6_addr, rt);
|
|
|
|
/* If an entry already exists, just update the fields */
|
|
if (rt) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_MFC)
|
|
log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n",
|
|
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
|
|
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
|
|
mfccp->mf6cc_parent);
|
|
#endif
|
|
|
|
s = splnet();
|
|
rt->mf6c_parent = mfccp->mf6cc_parent;
|
|
rt->mf6c_ifset = mfccp->mf6cc_ifset;
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find the entry for which the upcall was made and update
|
|
*/
|
|
s = splnet();
|
|
hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
|
|
mfccp->mf6cc_mcastgrp.sin6_addr);
|
|
for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
|
|
if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
|
|
&mfccp->mf6cc_origin.sin6_addr) &&
|
|
IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
|
|
&mfccp->mf6cc_mcastgrp.sin6_addr) &&
|
|
(rt->mf6c_stall != NULL)) {
|
|
|
|
if (nstl++)
|
|
log(LOG_ERR,
|
|
"add_m6fc: %s o %s g %s p %x dbx %x\n",
|
|
"multiple kernel entries",
|
|
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
|
|
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
|
|
mfccp->mf6cc_parent, (u_int)rt->mf6c_stall);
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_MFC)
|
|
log(LOG_DEBUG,
|
|
"add_m6fc o %s g %s p %x dbg %x\n",
|
|
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
|
|
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
|
|
mfccp->mf6cc_parent, rt->mf6c_stall);
|
|
#endif
|
|
|
|
rt->mf6c_origin = mfccp->mf6cc_origin;
|
|
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
|
|
rt->mf6c_parent = mfccp->mf6cc_parent;
|
|
rt->mf6c_ifset = mfccp->mf6cc_ifset;
|
|
/* initialize pkt counters per src-grp */
|
|
rt->mf6c_pkt_cnt = 0;
|
|
rt->mf6c_byte_cnt = 0;
|
|
rt->mf6c_wrong_if = 0;
|
|
|
|
rt->mf6c_expire = 0; /* Don't clean this guy up */
|
|
nexpire[hash]--;
|
|
|
|
/* free packets Qed at the end of this entry */
|
|
for (rte = rt->mf6c_stall; rte != NULL; ) {
|
|
struct rtdetq *n = rte->next;
|
|
ip6_mdq(rte->m, rte->ifp, rt);
|
|
m_freem(rte->m);
|
|
#ifdef UPCALL_TIMING
|
|
collate(&(rte->t));
|
|
#endif /* UPCALL_TIMING */
|
|
free(rte, M_MRTABLE);
|
|
rte = n;
|
|
}
|
|
rt->mf6c_stall = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* It is possible that an entry is being inserted without an upcall
|
|
*/
|
|
if (nstl == 0) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_MFC)
|
|
log(LOG_DEBUG,"add_mfc no upcall h %d o %s g %s p %x\n",
|
|
hash,
|
|
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
|
|
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
|
|
mfccp->mf6cc_parent);
|
|
#endif
|
|
|
|
for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
|
|
|
|
if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
|
|
&mfccp->mf6cc_origin.sin6_addr)&&
|
|
IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
|
|
&mfccp->mf6cc_mcastgrp.sin6_addr)) {
|
|
|
|
rt->mf6c_origin = mfccp->mf6cc_origin;
|
|
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
|
|
rt->mf6c_parent = mfccp->mf6cc_parent;
|
|
/* initialize pkt counters per src-grp */
|
|
rt->mf6c_pkt_cnt = 0;
|
|
rt->mf6c_byte_cnt = 0;
|
|
rt->mf6c_wrong_if = 0;
|
|
|
|
if (rt->mf6c_expire)
|
|
nexpire[hash]--;
|
|
rt->mf6c_expire = 0;
|
|
}
|
|
}
|
|
if (rt == NULL) {
|
|
/* no upcall, so make a new entry */
|
|
rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
|
|
M_NOWAIT);
|
|
if (rt == NULL) {
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/* insert new entry at head of hash chain */
|
|
rt->mf6c_origin = mfccp->mf6cc_origin;
|
|
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
|
|
rt->mf6c_parent = mfccp->mf6cc_parent;
|
|
/* initialize pkt counters per src-grp */
|
|
rt->mf6c_pkt_cnt = 0;
|
|
rt->mf6c_byte_cnt = 0;
|
|
rt->mf6c_wrong_if = 0;
|
|
rt->mf6c_expire = 0;
|
|
rt->mf6c_stall = NULL;
|
|
|
|
/* link into table */
|
|
rt->mf6c_next = mf6ctable[hash];
|
|
mf6ctable[hash] = rt;
|
|
}
|
|
}
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef UPCALL_TIMING
|
|
/*
|
|
* collect delay statistics on the upcalls
|
|
*/
|
|
static void
|
|
collate(t)
|
|
register struct timeval *t;
|
|
{
|
|
register u_long d;
|
|
register struct timeval tp;
|
|
register u_long delta;
|
|
|
|
GET_TIME(tp);
|
|
|
|
if (TV_LT(*t, tp))
|
|
{
|
|
TV_DELTA(tp, *t, delta);
|
|
|
|
d = delta >> 10;
|
|
if (d > 50)
|
|
d = 50;
|
|
|
|
++upcall_data[d];
|
|
}
|
|
}
|
|
#endif /* UPCALL_TIMING */
|
|
|
|
/*
|
|
* Delete an mfc entry
|
|
*/
|
|
static int
|
|
del_m6fc(mfccp)
|
|
struct mf6cctl *mfccp;
|
|
{
|
|
struct sockaddr_in6 origin;
|
|
struct sockaddr_in6 mcastgrp;
|
|
struct mf6c *rt;
|
|
struct mf6c **nptr;
|
|
u_long hash;
|
|
int s;
|
|
|
|
origin = mfccp->mf6cc_origin;
|
|
mcastgrp = mfccp->mf6cc_mcastgrp;
|
|
hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_MFC)
|
|
log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
|
|
ip6_sprintf(&origin.sin6_addr),
|
|
ip6_sprintf(&mcastgrp.sin6_addr));
|
|
#endif
|
|
|
|
s = splnet();
|
|
|
|
nptr = &mf6ctable[hash];
|
|
while ((rt = *nptr) != NULL) {
|
|
if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
|
|
&rt->mf6c_origin.sin6_addr) &&
|
|
IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
|
|
&rt->mf6c_mcastgrp.sin6_addr) &&
|
|
rt->mf6c_stall == NULL)
|
|
break;
|
|
|
|
nptr = &rt->mf6c_next;
|
|
}
|
|
if (rt == NULL) {
|
|
splx(s);
|
|
return EADDRNOTAVAIL;
|
|
}
|
|
|
|
*nptr = rt->mf6c_next;
|
|
free(rt, M_MRTABLE);
|
|
|
|
splx(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
socket_send(s, mm, src)
|
|
struct socket *s;
|
|
struct mbuf *mm;
|
|
struct sockaddr_in6 *src;
|
|
{
|
|
if (s) {
|
|
if (sbappendaddr(&s->so_rcv,
|
|
(struct sockaddr *)src,
|
|
mm, (struct mbuf *)0) != 0) {
|
|
sorwakeup(s);
|
|
return 0;
|
|
}
|
|
}
|
|
m_freem(mm);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* IPv6 multicast forwarding function. This function assumes that the packet
|
|
* pointed to by "ip6" has arrived on (or is about to be sent to) the interface
|
|
* pointed to by "ifp", and the packet is to be relayed to other networks
|
|
* that have members of the packet's destination IPv6 multicast group.
|
|
*
|
|
* The packet is returned unscathed to the caller, unless it is
|
|
* erroneous, in which case a non-zero return value tells the caller to
|
|
* discard it.
|
|
*/
|
|
|
|
int
|
|
ip6_mforward(ip6, ifp, m)
|
|
register struct ip6_hdr *ip6;
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
{
|
|
register struct mf6c *rt;
|
|
register struct mif6 *mifp;
|
|
register struct mbuf *mm;
|
|
int s;
|
|
mifi_t mifi;
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_FORWARD)
|
|
log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
|
|
ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst),
|
|
ifp->if_index);
|
|
#endif
|
|
/*
|
|
* If the packet is loop-backed, it should be for local listeners
|
|
* and need not to be forwarded any more.
|
|
* XXX: M_LOOP is an ad-hoc hack...
|
|
*/
|
|
if (m->m_flags & M_LOOP)
|
|
return 0;
|
|
|
|
/*
|
|
* Don't forward a packet with Hop limit of zero or one,
|
|
* or a packet destined to a local-only group.
|
|
*/
|
|
if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) ||
|
|
IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
|
|
return 0;
|
|
ip6->ip6_hlim--;
|
|
|
|
/*
|
|
* Determine forwarding mifs from the forwarding cache table
|
|
*/
|
|
s = splnet();
|
|
MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
|
|
|
|
/* Entry exists, so forward if necessary */
|
|
if (rt) {
|
|
splx(s);
|
|
return (ip6_mdq(m, ifp, rt));
|
|
} else {
|
|
/*
|
|
* If we don't have a route for packet's origin,
|
|
* Make a copy of the packet &
|
|
* send message to routing daemon
|
|
*/
|
|
|
|
register struct mbuf *mb0;
|
|
register struct rtdetq *rte;
|
|
register u_long hash;
|
|
/* register int i, npkts;*/
|
|
#ifdef UPCALL_TIMING
|
|
struct timeval tp;
|
|
|
|
GET_TIME(tp);
|
|
#endif /* UPCALL_TIMING */
|
|
|
|
mrt6stat.mrt6s_no_route++;
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC))
|
|
log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n",
|
|
ip6_sprintf(&ip6->ip6_src),
|
|
ip6_sprintf(&ip6->ip6_dst));
|
|
#endif
|
|
|
|
/*
|
|
* Allocate mbufs early so that we don't do extra work if we
|
|
* are just going to fail anyway.
|
|
*/
|
|
rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE,
|
|
M_NOWAIT);
|
|
if (rte == NULL) {
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
mb0 = m_copy(m, 0, M_COPYALL);
|
|
/*
|
|
* Pullup packet header if needed before storing it,
|
|
* as other references may modify it in the meantime.
|
|
*/
|
|
if (mb0 &&
|
|
(M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr)))
|
|
mb0 = m_pullup(mb0, sizeof(struct ip6_hdr));
|
|
if (mb0 == NULL) {
|
|
free(rte, M_MRTABLE);
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/* is there an upcall waiting for this packet? */
|
|
hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst);
|
|
for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
|
|
if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src,
|
|
&rt->mf6c_origin.sin6_addr) &&
|
|
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
|
|
&rt->mf6c_mcastgrp.sin6_addr) &&
|
|
(rt->mf6c_stall != NULL))
|
|
break;
|
|
}
|
|
|
|
if (rt == NULL) {
|
|
struct mrt6msg *im;
|
|
|
|
/* no upcall, so make a new entry */
|
|
rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
|
|
M_NOWAIT);
|
|
if (rt == NULL) {
|
|
free(rte, M_MRTABLE);
|
|
m_freem(mb0);
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
/*
|
|
* Make a copy of the header to send to the user
|
|
* level process
|
|
*/
|
|
mm = m_copy(mb0, 0, sizeof(struct ip6_hdr));
|
|
|
|
if (mm == NULL) {
|
|
free(rte, M_MRTABLE);
|
|
m_freem(mb0);
|
|
free(rt, M_MRTABLE);
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
/*
|
|
* Send message to routing daemon
|
|
*/
|
|
sin6.sin6_addr = ip6->ip6_src;
|
|
|
|
im = mtod(mm, struct mrt6msg *);
|
|
im->im6_msgtype = MRT6MSG_NOCACHE;
|
|
im->im6_mbz = 0;
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_FORWARD)
|
|
log(LOG_DEBUG,
|
|
"getting the iif info in the kernel\n");
|
|
#endif
|
|
|
|
for (mifp = mif6table, mifi = 0;
|
|
mifi < nummifs && mifp->m6_ifp != ifp;
|
|
mifp++, mifi++)
|
|
;
|
|
|
|
im->im6_mif = mifi;
|
|
|
|
if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
|
|
log(LOG_WARNING, "ip6_mforward: ip6_mrouter "
|
|
"socket queue full\n");
|
|
mrt6stat.mrt6s_upq_sockfull++;
|
|
free(rte, M_MRTABLE);
|
|
m_freem(mb0);
|
|
free(rt, M_MRTABLE);
|
|
splx(s);
|
|
return ENOBUFS;
|
|
}
|
|
|
|
mrt6stat.mrt6s_upcalls++;
|
|
|
|
/* insert new entry at head of hash chain */
|
|
bzero(rt, sizeof(*rt));
|
|
rt->mf6c_origin.sin6_addr = ip6->ip6_src;
|
|
rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst;
|
|
rt->mf6c_expire = UPCALL_EXPIRE;
|
|
nexpire[hash]++;
|
|
rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
|
|
|
|
/* link into table */
|
|
rt->mf6c_next = mf6ctable[hash];
|
|
mf6ctable[hash] = rt;
|
|
/* Add this entry to the end of the queue */
|
|
rt->mf6c_stall = rte;
|
|
} else {
|
|
/* determine if q has overflowed */
|
|
struct rtdetq **p;
|
|
register int npkts = 0;
|
|
|
|
for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next)
|
|
if (++npkts > MAX_UPQ6) {
|
|
mrt6stat.mrt6s_upq_ovflw++;
|
|
free(rte, M_MRTABLE);
|
|
m_freem(mb0);
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
/* Add this entry to the end of the queue */
|
|
*p = rte;
|
|
}
|
|
|
|
rte->next = NULL;
|
|
rte->m = mb0;
|
|
rte->ifp = ifp;
|
|
#ifdef UPCALL_TIMING
|
|
rte->t = tp;
|
|
#endif /* UPCALL_TIMING */
|
|
|
|
splx(s);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Clean up cache entries if upcalls are not serviced
|
|
* Call from the Slow Timeout mechanism, every half second.
|
|
*/
|
|
static void
|
|
expire_upcalls(unused)
|
|
void *unused;
|
|
{
|
|
struct rtdetq *rte;
|
|
struct mf6c *mfc, **nptr;
|
|
int i;
|
|
int s;
|
|
|
|
s = splnet();
|
|
for (i = 0; i < MF6CTBLSIZ; i++) {
|
|
if (nexpire[i] == 0)
|
|
continue;
|
|
nptr = &mf6ctable[i];
|
|
while ((mfc = *nptr) != NULL) {
|
|
rte = mfc->mf6c_stall;
|
|
/*
|
|
* Skip real cache entries
|
|
* Make sure it wasn't marked to not expire (shouldn't happen)
|
|
* If it expires now
|
|
*/
|
|
if (rte != NULL &&
|
|
mfc->mf6c_expire != 0 &&
|
|
--mfc->mf6c_expire == 0) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_EXPIRE)
|
|
log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n",
|
|
ip6_sprintf(&mfc->mf6c_origin.sin6_addr),
|
|
ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr));
|
|
#endif
|
|
/*
|
|
* drop all the packets
|
|
* free the mbuf with the pkt, if, timing info
|
|
*/
|
|
do {
|
|
struct rtdetq *n = rte->next;
|
|
m_freem(rte->m);
|
|
free(rte, M_MRTABLE);
|
|
rte = n;
|
|
} while (rte != NULL);
|
|
mrt6stat.mrt6s_cache_cleanups++;
|
|
nexpire[i]--;
|
|
|
|
*nptr = mfc->mf6c_next;
|
|
free(mfc, M_MRTABLE);
|
|
} else {
|
|
nptr = &mfc->mf6c_next;
|
|
}
|
|
}
|
|
}
|
|
splx(s);
|
|
timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
|
|
}
|
|
|
|
/*
|
|
* Packet forwarding routine once entry in the cache is made
|
|
*/
|
|
static int
|
|
ip6_mdq(m, ifp, rt)
|
|
register struct mbuf *m;
|
|
register struct ifnet *ifp;
|
|
register struct mf6c *rt;
|
|
{
|
|
register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
|
|
register mifi_t mifi, iif;
|
|
register struct mif6 *mifp;
|
|
register u_long plen = m->m_pkthdr.len;
|
|
|
|
/*
|
|
* Macro to send packet on mif. Since RSVP packets don't get counted on
|
|
* input, they shouldn't get counted on output, so statistics keeping is
|
|
* seperate.
|
|
*/
|
|
|
|
#define MC6_SEND(ip6,mifp,m) { \
|
|
if ((mifp)->m6_flags & MIFF_REGISTER) \
|
|
register_send((ip6), (mifp), (m)); \
|
|
else \
|
|
phyint_send((ip6), (mifp), (m)); \
|
|
}
|
|
|
|
/*
|
|
* Don't forward if it didn't arrive from the parent mif
|
|
* for its origin.
|
|
*/
|
|
mifi = rt->mf6c_parent;
|
|
if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
|
|
/* came in the wrong interface */
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_FORWARD)
|
|
log(LOG_DEBUG,
|
|
"wrong if: ifid %d mifi %d mififid %x\n",
|
|
ifp->if_index, mifi,
|
|
mif6table[mifi].m6_ifp->if_index);
|
|
#endif
|
|
mrt6stat.mrt6s_wrong_if++;
|
|
rt->mf6c_wrong_if++;
|
|
/*
|
|
* If we are doing PIM processing, and we are forwarding
|
|
* packets on this interface, send a message to the
|
|
* routing daemon.
|
|
*/
|
|
if(mifi < nummifs) /* have to make sure this is a valid mif */
|
|
if(mif6table[mifi].m6_ifp)
|
|
|
|
if (pim6) {
|
|
static struct sockaddr_in6 sin6 =
|
|
{ sizeof(sin6), AF_INET6 };
|
|
|
|
register struct mbuf *mm;
|
|
struct mrt6msg *im;
|
|
|
|
mm = m_copy(m, 0,
|
|
sizeof(struct ip6_hdr));
|
|
if (mm &&
|
|
(M_HASCL(mm) ||
|
|
mm->m_len < sizeof(struct ip6_hdr)))
|
|
mm = m_pullup(mm, sizeof(struct ip6_hdr));
|
|
if (mm == NULL)
|
|
return ENOBUFS;
|
|
|
|
im = mtod(mm, struct mrt6msg *);
|
|
im->im6_msgtype = MRT6MSG_WRONGMIF;
|
|
im->im6_mbz = 0;
|
|
|
|
for (mifp = mif6table, iif = 0;
|
|
iif < nummifs && mifp &&
|
|
mifp->m6_ifp != ifp;
|
|
mifp++, iif++);
|
|
|
|
im->im6_mif = iif;
|
|
|
|
sin6.sin6_addr = im->im6_src;
|
|
|
|
mrt6stat.mrt6s_upcalls++;
|
|
|
|
if (socket_send(ip6_mrouter, mm,
|
|
&sin6) < 0) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug)
|
|
log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
|
|
#endif
|
|
++mrt6stat.mrt6s_upq_sockfull;
|
|
return ENOBUFS;
|
|
} /* if socket Q full */
|
|
} /* if PIM */
|
|
return 0;
|
|
} /* if wrong iif */
|
|
|
|
/* If I sourced this packet, it counts as output, else it was input. */
|
|
if (m->m_pkthdr.rcvif == NULL) {
|
|
/* XXX: is rcvif really NULL when output?? */
|
|
mif6table[mifi].m6_pkt_out++;
|
|
mif6table[mifi].m6_bytes_out += plen;
|
|
} else {
|
|
mif6table[mifi].m6_pkt_in++;
|
|
mif6table[mifi].m6_bytes_in += plen;
|
|
}
|
|
rt->mf6c_pkt_cnt++;
|
|
rt->mf6c_byte_cnt += plen;
|
|
|
|
/*
|
|
* For each mif, forward a copy of the packet if there are group
|
|
* members downstream on the interface.
|
|
*/
|
|
for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++)
|
|
if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
|
|
mifp->m6_pkt_out++;
|
|
mifp->m6_bytes_out += plen;
|
|
MC6_SEND(ip6, mifp, m);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
phyint_send(ip6, mifp, m)
|
|
struct ip6_hdr *ip6;
|
|
struct mif6 *mifp;
|
|
struct mbuf *m;
|
|
{
|
|
register struct mbuf *mb_copy;
|
|
struct ifnet *ifp = mifp->m6_ifp;
|
|
int error = 0;
|
|
int s = splnet();
|
|
static struct route_in6 ro6;
|
|
struct in6_multi *in6m;
|
|
|
|
/*
|
|
* Make a new reference to the packet; make sure that
|
|
* the IPv6 header is actually copied, not just referenced,
|
|
* so that ip6_output() only scribbles on the copy.
|
|
*/
|
|
mb_copy = m_copy(m, 0, M_COPYALL);
|
|
if (mb_copy &&
|
|
(M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr)))
|
|
mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr));
|
|
if (mb_copy == NULL)
|
|
return;
|
|
/* set MCAST flag to the outgoing packet */
|
|
mb_copy->m_flags |= M_MCAST;
|
|
|
|
/*
|
|
* If we sourced the packet, call ip6_output since we may devide
|
|
* the packet into fragments when the packet is too big for the
|
|
* outgoing interface.
|
|
* Otherwise, we can simply send the packet to the interface
|
|
* sending queue.
|
|
*/
|
|
if (m->m_pkthdr.rcvif == NULL) {
|
|
struct ip6_moptions im6o;
|
|
|
|
im6o.im6o_multicast_ifp = ifp;
|
|
/* XXX: ip6_output will override ip6->ip6_hlim */
|
|
im6o.im6o_multicast_hlim = ip6->ip6_hlim;
|
|
im6o.im6o_multicast_loop = 1;
|
|
error = ip6_output(mb_copy, NULL, &ro6,
|
|
IPV6_FORWARDING, &im6o);
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_XMIT)
|
|
log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
|
|
mifp - mif6table, error);
|
|
#endif
|
|
splx(s);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If we belong to the destination multicast group
|
|
* on the outgoing interface, loop back a copy.
|
|
*/
|
|
IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
|
|
if (in6m != NULL) {
|
|
ro6.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
|
|
ro6.ro_dst.sin6_family = AF_INET6;
|
|
ro6.ro_dst.sin6_addr = ip6->ip6_dst;
|
|
ip6_mloopback(ifp, m, &ro6.ro_dst);
|
|
}
|
|
/*
|
|
* Put the packet into the sending queue of the outgoing interface
|
|
* if it would fit in the MTU of the interface.
|
|
*/
|
|
if (mb_copy->m_pkthdr.len < ifp->if_mtu || ifp->if_mtu < IPV6_MMTU) {
|
|
ro6.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
|
|
ro6.ro_dst.sin6_family = AF_INET6;
|
|
ro6.ro_dst.sin6_addr = ip6->ip6_dst;
|
|
error = (*ifp->if_output)(ifp, mb_copy,
|
|
(struct sockaddr *)&ro6.ro_dst,
|
|
NULL);
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_XMIT)
|
|
log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
|
|
mifp - mif6table, error);
|
|
#endif
|
|
}
|
|
else {
|
|
#ifdef MULTICAST_PMTUD
|
|
icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu);
|
|
return;
|
|
#else
|
|
#ifdef MRT6DEBUG
|
|
#ifdef __NetBSD__
|
|
if (mrt6debug & DEBUG_DEBUG_XMIT)
|
|
log(LOG_DEBUG,
|
|
"phyint_send: packet too big on %s o %s g %s"
|
|
" size %d(discarded)\n",
|
|
ifp->if_xname,
|
|
ip6_sprintf(&ip6->ip6_src),
|
|
ip6_sprintf(&ip6->ip6_dst),
|
|
mb_copy->m_pkthdr.len);
|
|
#else
|
|
if (mrt6debug & DEBUG_XMIT)
|
|
log(LOG_DEBUG,
|
|
"phyint_send: packet too big on %s%u o %s g %s"
|
|
" size %d(discarded)\n",
|
|
ifp->if_name, ifp->if_unit,
|
|
ip6_sprintf(&ip6->ip6_src),
|
|
ip6_sprintf(&ip6->ip6_dst),
|
|
mb_copy->m_pkthdr.len);
|
|
#endif /* __NetBSD__ */
|
|
#endif /* MRT6DEBUG */
|
|
m_freem(mb_copy); /* simply discard the packet */
|
|
return;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static int
|
|
register_send(ip6, mif, m)
|
|
register struct ip6_hdr *ip6;
|
|
struct mif6 *mif;
|
|
register struct mbuf *m;
|
|
{
|
|
register struct mbuf *mm;
|
|
register int i, len = m->m_pkthdr.len;
|
|
static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
|
|
struct mrt6msg *im6;
|
|
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug)
|
|
log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n",
|
|
ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst));
|
|
#endif
|
|
++pim6stat.pim6s_snd_registers;
|
|
|
|
/* Make a copy of the packet to send to the user level process */
|
|
MGETHDR(mm, M_DONTWAIT, MT_HEADER);
|
|
if (mm == NULL)
|
|
return ENOBUFS;
|
|
mm->m_data += max_linkhdr;
|
|
mm->m_len = sizeof(struct ip6_hdr);
|
|
|
|
if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
|
|
m_freem(mm);
|
|
return ENOBUFS;
|
|
}
|
|
i = MHLEN - M_LEADINGSPACE(mm);
|
|
if (i > len)
|
|
i = len;
|
|
mm = m_pullup(mm, i);
|
|
if (mm == NULL){
|
|
m_freem(mm);
|
|
return ENOBUFS;
|
|
}
|
|
/* TODO: check it! */
|
|
mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
|
|
|
|
/*
|
|
* Send message to routing daemon
|
|
*/
|
|
sin6.sin6_addr = ip6->ip6_src;
|
|
|
|
im6 = mtod(mm, struct mrt6msg *);
|
|
im6->im6_msgtype = MRT6MSG_WHOLEPKT;
|
|
im6->im6_mbz = 0;
|
|
|
|
im6->im6_mif = mif - mif6table;
|
|
|
|
/* iif info is not given for reg. encap.n */
|
|
mrt6stat.mrt6s_upcalls++;
|
|
|
|
if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug)
|
|
log(LOG_WARNING,
|
|
"register_send: ip_mrouter socket queue full\n");
|
|
#endif
|
|
++mrt6stat.mrt6s_upq_sockfull;
|
|
return ENOBUFS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* PIM sparse mode hook
|
|
* Receives the pim control messages, and passes them up to the listening
|
|
* socket, using rip6_input.
|
|
* The only message processed is the REGISTER pim message; the pim header
|
|
* is stripped off, and the inner packet is passed to register_mforward.
|
|
*/
|
|
int
|
|
pim6_input(mp, offp, proto)
|
|
struct mbuf **mp;
|
|
int *offp, proto;
|
|
{
|
|
register struct pim *pim; /* pointer to a pim struct */
|
|
register struct ip6_hdr *ip6;
|
|
register int pimlen;
|
|
struct mbuf *m = *mp;
|
|
int minlen;
|
|
int off = *offp;
|
|
|
|
++pim6stat.pim6s_rcv_total;
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
pimlen = m->m_pkthdr.len - *offp;
|
|
|
|
/*
|
|
* Validate lengths
|
|
*/
|
|
if (pimlen < PIM_MINLEN) {
|
|
++pim6stat.pim6s_rcv_tooshort;
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM)
|
|
log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
/*
|
|
* if the packet is at least as big as a REGISTER, go ahead
|
|
* and grab the PIM REGISTER header size, to avoid another
|
|
* possible m_pullup() later.
|
|
*
|
|
* PIM_MINLEN == pimhdr + u_int32 == 8
|
|
* PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40
|
|
*/
|
|
minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
|
|
|
|
/*
|
|
* Make sure that the IP6 and PIM headers in contiguous memory, and
|
|
* possibly the PIM REGISTER header
|
|
*/
|
|
IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE);
|
|
/* adjust pointer */
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
|
|
/* adjust mbuf to point to the PIM header */
|
|
pim = (struct pim *)((caddr_t)ip6 + off);
|
|
|
|
#define PIM6_CHECKSUM
|
|
#ifdef PIM6_CHECKSUM
|
|
{
|
|
int cksumlen;
|
|
|
|
/*
|
|
* Validate checksum.
|
|
* If PIM REGISTER, exclude the data packet
|
|
*/
|
|
if (pim->pim_type == PIM_REGISTER)
|
|
cksumlen = PIM_MINLEN;
|
|
else
|
|
cksumlen = pimlen;
|
|
|
|
if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
|
|
++pim6stat.pim6s_rcv_badsum;
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM)
|
|
log(LOG_DEBUG,
|
|
"pim6_input: invalid checksum\n");
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
}
|
|
#endif /* PIM_CHECKSUM */
|
|
|
|
/* PIM version check */
|
|
if (pim->pim_ver != PIM_VERSION) {
|
|
++pim6stat.pim6s_rcv_badversion;
|
|
#ifdef MRT6DEBUG
|
|
log(LOG_ERR,
|
|
"pim6_input: incorrect version %d, expecting %d\n",
|
|
pim->pim_ver, PIM_VERSION);
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
if (pim->pim_type == PIM_REGISTER) {
|
|
/*
|
|
* since this is a REGISTER, we'll make a copy of the register
|
|
* headers ip6+pim+u_long+encap_ip6, to be passed up to the
|
|
* routing daemon.
|
|
*/
|
|
static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 };
|
|
|
|
struct mbuf *mcp;
|
|
struct ip6_hdr *eip6;
|
|
u_long *reghdr;
|
|
int rc;
|
|
|
|
++pim6stat.pim6s_rcv_registers;
|
|
|
|
if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) {
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM)
|
|
log(LOG_DEBUG,
|
|
"pim6_input: register mif not set: %d\n",
|
|
reg_mif_num);
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
reghdr = (u_long *)(pim + 1);
|
|
|
|
if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
|
|
goto pim6_input_to_daemon;
|
|
|
|
/*
|
|
* Validate length
|
|
*/
|
|
if (pimlen < PIM6_REG_MINLEN) {
|
|
++pim6stat.pim6s_rcv_tooshort;
|
|
++pim6stat.pim6s_rcv_badregisters;
|
|
#ifdef MRT6DEBUG
|
|
log(LOG_ERR,
|
|
"pim6_input: register packet size too "
|
|
"small %d from %s\n",
|
|
pimlen, ip6_sprintf(&ip6->ip6_src));
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
eip6 = (struct ip6_hdr *) (reghdr + 1);
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM)
|
|
log(LOG_DEBUG,
|
|
"pim6_input[register], eip6: %s -> %s, "
|
|
"eip6 plen %d\n",
|
|
ip6_sprintf(&eip6->ip6_src),
|
|
ip6_sprintf(&eip6->ip6_dst),
|
|
ntohs(eip6->ip6_plen));
|
|
#endif
|
|
|
|
/* verify the inner packet is destined to a mcast group */
|
|
if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
|
|
++pim6stat.pim6s_rcv_badregisters;
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM)
|
|
log(LOG_DEBUG,
|
|
"pim6_input: inner packet of register "
|
|
"is not multicast %s\n",
|
|
ip6_sprintf(&eip6->ip6_dst));
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
/*
|
|
* make a copy of the whole header to pass to the daemon later.
|
|
*/
|
|
mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
|
|
if (mcp == NULL) {
|
|
#ifdef MRT6DEBUG
|
|
log(LOG_ERR,
|
|
"pim6_input: pim register: "
|
|
"could not copy register head\n");
|
|
#endif
|
|
m_freem(m);
|
|
return(IPPROTO_DONE);
|
|
}
|
|
|
|
/*
|
|
* forward the inner ip6 packet; point m_data at the inner ip6.
|
|
*/
|
|
m_adj(m, off + PIM_MINLEN);
|
|
#ifdef MRT6DEBUG
|
|
if (mrt6debug & DEBUG_PIM) {
|
|
log(LOG_DEBUG,
|
|
"pim6_input: forwarding decapsulated register: "
|
|
"src %s, dst %s, mif %d\n",
|
|
ip6_sprintf(&eip6->ip6_src),
|
|
ip6_sprintf(&eip6->ip6_dst),
|
|
reg_mif_num);
|
|
}
|
|
#endif
|
|
|
|
rc = looutput(mif6table[reg_mif_num].m6_ifp, m,
|
|
(struct sockaddr *) &dst,
|
|
(struct rtentry *) NULL);
|
|
|
|
/* prepare the register head to send to the mrouting daemon */
|
|
m = mcp;
|
|
}
|
|
|
|
/*
|
|
* Pass the PIM message up to the daemon; if it is a register message
|
|
* pass the 'head' only up to the daemon. This includes the
|
|
* encapsulator ip6 header, pim header, register header and the
|
|
* encapsulated ip6 header.
|
|
*/
|
|
pim6_input_to_daemon:
|
|
rip6_input(&m, offp, proto);
|
|
return(IPPROTO_DONE);
|
|
}
|