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authorshin <shin@FreeBSD.org>2000-01-28 05:27:14 +0000
committershin <shin@FreeBSD.org>2000-01-28 05:27:14 +0000
commitf8e48f511e5de002b13eb638515c1422d6ca1173 (patch)
tree1eb6af1af4a59a559f8ec716ab60a22fb5f3a761 /sys/netinet6
parent417b54f8df0382bc71e299bb3cf35e74b2579e6c (diff)
downloadFreeBSD-src-f8e48f511e5de002b13eb638515c1422d6ca1173.zip
FreeBSD-src-f8e48f511e5de002b13eb638515c1422d6ca1173.tar.gz
Sorry I didn't commit these files at the commit just a few minutes before.
(IPv6 multicast routing) I think I mistakenly touched TAB and the last arg sys/netinet6 to the cvs commit changed to sys/netinet6/in6_proto.c.
Diffstat (limited to 'sys/netinet6')
-rw-r--r--sys/netinet6/ip6_input.c15
-rw-r--r--sys/netinet6/ip6_mroute.c1661
-rw-r--r--sys/netinet6/ip6_mroute.h484
-rw-r--r--sys/netinet6/ip6_output.c19
-rw-r--r--sys/netinet6/raw_ip6.c19
5 files changed, 2197 insertions, 1 deletions
diff --git a/sys/netinet6/ip6_input.c b/sys/netinet6/ip6_input.c
index 8953a5d..083f780 100644
--- a/sys/netinet6/ip6_input.c
+++ b/sys/netinet6/ip6_input.c
@@ -403,7 +403,7 @@ ip6_input(m)
IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
if (in6m)
ours = 1;
- else {
+ else if (!ip6_mrouter) {
ip6stat.ip6s_notmember++;
ip6stat.ip6s_cantforward++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
@@ -539,6 +539,19 @@ ip6_input(m)
* Forward if desirable.
*/
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ /*
+ * If we are acting as a multicast router, all
+ * incoming multicast packets are passed to the
+ * kernel-level multicast forwarding function.
+ * The packet is returned (relatively) intact; if
+ * ip6_mforward() returns a non-zero value, the packet
+ * must be discarded, else it may be accepted below.
+ */
+ if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
+ ip6stat.ip6s_cantforward++;
+ m_freem(m);
+ return;
+ }
if (!ours) {
m_freem(m);
return;
diff --git a/sys/netinet6/ip6_mroute.c b/sys/netinet6/ip6_mroute.c
new file mode 100644
index 0000000..1f6b5f2
--- /dev/null
+++ b/sys/netinet6/ip6_mroute.c
@@ -0,0 +1,1661 @@
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
+ *
+ * $FreeBSD$
+ */
+
+/* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */
+
+/*
+ * IP multicast forwarding procedures
+ *
+ * Written by David Waitzman, BBN Labs, August 1988.
+ * Modified by Steve Deering, Stanford, February 1989.
+ * Modified by Mark J. Steiglitz, Stanford, May, 1991
+ * Modified by Van Jacobson, LBL, January 1993
+ * Modified by Ajit Thyagarajan, PARC, August 1993
+ * Modified by Bill Fenenr, PARC, April 1994
+ *
+ * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
+ */
+
+#include "opt_inet.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/sockio.h>
+#include <sys/protosw.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+#include <sys/kernel.h>
+#include <sys/sockio.h>
+#include <sys/syslog.h>
+
+#include <net/if.h>
+#include <net/route.h>
+#include <net/raw_cb.h>
+
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+
+#include <netinet6/ip6.h>
+#include <netinet6/ip6_var.h>
+#include <netinet6/ip6_mroute.h>
+#include <netinet6/pim6.h>
+#include <netinet6/pim6_var.h>
+
+static MALLOC_DEFINE(M_MRTABLE, "mf6c", "multicast forwarding cache entry");
+
+#define M_HASCL(m) ((m)->m_flags & M_EXT)
+
+static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *));
+static void phyint_send __P((struct ip6_hdr *, struct mif6 *,
+ struct mbuf *));
+
+static int set_pim6 __P((int *));
+static int socket_send __P((struct socket *, struct mbuf *,
+ struct sockaddr_in6 *));
+static int register_send __P((struct ip6_hdr *, struct mif6 *,
+ struct mbuf *));
+
+/*
+ * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
+ * except for netstat or debugging purposes.
+ */
+struct socket *ip6_mrouter = NULL;
+int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
+struct mrt6stat mrt6stat;
+
+#define NO_RTE_FOUND 0x1
+#define RTE_FOUND 0x2
+
+struct mf6c *mf6ctable[MF6CTBLSIZ];
+u_char nexpire[MF6CTBLSIZ];
+static struct mif6 mif6table[MAXMIFS];
+#ifdef MRT6DEBUG
+u_int mrt6debug = 0; /* debug level */
+#define DEBUG_MFC 0x02
+#define DEBUG_FORWARD 0x04
+#define DEBUG_EXPIRE 0x08
+#define DEBUG_XMIT 0x10
+#define DEBUG_REG 0x20
+#define DEBUG_PIM 0x40
+#endif
+
+static void expire_upcalls __P((void *));
+#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
+#define UPCALL_EXPIRE 6 /* number of timeouts */
+
+#ifdef INET
+#ifdef MROUTING
+extern struct socket *ip_mrouter;
+#endif
+#endif
+
+/*
+ * 'Interfaces' associated with decapsulator (so we can tell
+ * packets that went through it from ones that get reflected
+ * by a broken gateway). These interfaces are never linked into
+ * the system ifnet list & no routes point to them. I.e., packets
+ * can't be sent this way. They only exist as a placeholder for
+ * multicast source verification.
+ */
+struct ifnet multicast_register_if;
+
+#define ENCAP_HOPS 64
+
+/*
+ * Private variables.
+ */
+static mifi_t nummifs = 0;
+static mifi_t reg_mif_num = (mifi_t)-1;
+
+static struct pim6stat pim6stat;
+static struct callout_handle expire_upcalls_ch;
+
+/*
+ * one-back cache used by ipip_input to locate a tunnel's mif
+ * given a datagram's src ip address.
+ */
+static int pim6;
+
+/*
+ * Hash function for a source, group entry
+ */
+#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
+ (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
+ (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
+ (g).s6_addr32[2] ^ (g).s6_addr32[3])
+
+/*
+ * Find a route for a given origin IPv6 address and Multicast group address.
+ * Quality of service parameter to be added in the future!!!
+ */
+
+#define MF6CFIND(o, g, rt) { \
+ register struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
+ rt = NULL; \
+ mrt6stat.mrt6s_mfc_lookups++; \
+ while (_rt) { \
+ if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
+ IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
+ (_rt->mf6c_stall == NULL)) { \
+ rt = _rt; \
+ break; \
+ } \
+ _rt = _rt->mf6c_next; \
+ } \
+ if (rt == NULL) { \
+ mrt6stat.mrt6s_mfc_misses++; \
+ } \
+}
+
+/*
+ * Macros to compute elapsed time efficiently
+ * Borrowed from Van Jacobson's scheduling code
+ */
+#define TV_DELTA(a, b, delta) { \
+ register int xxs; \
+ \
+ delta = (a).tv_usec - (b).tv_usec; \
+ if ((xxs = (a).tv_sec - (b).tv_sec)) { \
+ switch (xxs) { \
+ case 2: \
+ delta += 1000000; \
+ /* fall through */ \
+ case 1: \
+ delta += 1000000; \
+ break; \
+ default: \
+ delta += (1000000 * xxs); \
+ } \
+ } \
+}
+
+#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
+ (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
+
+#ifdef UPCALL_TIMING
+#define UPCALL_MAX 50
+u_long upcall_data[UPCALL_MAX + 1];
+static void collate();
+#endif /* UPCALL_TIMING */
+
+static int get_sg_cnt __P((struct sioc_sg_req6 *));
+static int get_mif6_cnt __P((struct sioc_mif_req6 *));
+static int ip6_mrouter_init __P((struct socket *, struct mbuf *));
+static int add_m6if __P((struct mif6ctl *));
+static int del_m6if __P((mifi_t *));
+static int add_m6fc __P((struct mf6cctl *));
+static int del_m6fc __P((struct mf6cctl *));
+
+/*
+ * Handle MRT setsockopt commands to modify the multicast routing tables.
+ */
+int
+ip6_mrouter_set(so, sopt)
+ struct socket *so;
+ struct sockopt *sopt;
+{
+ int error = 0;
+ struct mbuf *m;
+
+ if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT)
+ return (EACCES);
+
+ if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
+ return (error);
+ if ((error = soopt_mcopyin(sopt, m)) != 0) /* XXX */
+ return (error);
+
+ switch (sopt->sopt_name) {
+ case MRT6_INIT:
+ error = ip6_mrouter_init(so, m);
+ break;
+ case MRT6_DONE:
+ error = ip6_mrouter_done();
+ break;
+ case MRT6_ADD_MIF:
+ error = add_m6if(mtod(m, struct mif6ctl *));
+ break;
+ case MRT6_DEL_MIF:
+ error = del_m6if(mtod(m, mifi_t *));
+ break;
+ case MRT6_ADD_MFC:
+ error = add_m6fc(mtod(m, struct mf6cctl *));
+ break;
+ case MRT6_DEL_MFC:
+ error = del_m6fc(mtod(m, struct mf6cctl *));
+ break;
+ case MRT6_PIM:
+ error = set_pim6(mtod(m, int *));
+ break;
+ default:
+ error = EOPNOTSUPP;
+ break;
+ }
+
+ (void)m_freem(m);
+ return(error);
+}
+
+/*
+ * Handle MRT getsockopt commands
+ */
+int
+ip6_mrouter_get(so, sopt)
+ struct socket *so;
+ struct sockopt *sopt;
+{
+ int error = 0;
+
+ if (so != ip6_mrouter) return EACCES;
+
+ switch (sopt->sopt_name) {
+ case MRT6_PIM:
+ error = sooptcopyout(sopt, &pim6, sizeof(pim6));
+ break;
+ }
+ return (error);
+}
+
+/*
+ * Handle ioctl commands to obtain information from the cache
+ */
+int
+mrt6_ioctl(cmd, data)
+ int cmd;
+ caddr_t data;
+{
+ int error = 0;
+
+ switch (cmd) {
+ case SIOCGETSGCNT_IN6:
+ return(get_sg_cnt((struct sioc_sg_req6 *)data));
+ break; /* for safety */
+ case SIOCGETMIFCNT_IN6:
+ return(get_mif6_cnt((struct sioc_mif_req6 *)data));
+ break; /* for safety */
+ default:
+ return (EINVAL);
+ break;
+ }
+ return error;
+}
+
+/*
+ * returns the packet, byte, rpf-failure count for the source group provided
+ */
+static int
+get_sg_cnt(req)
+ register struct sioc_sg_req6 *req;
+{
+ register struct mf6c *rt;
+ int s;
+
+ s = splnet();
+ MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
+ splx(s);
+ if (rt != NULL) {
+ req->pktcnt = rt->mf6c_pkt_cnt;
+ req->bytecnt = rt->mf6c_byte_cnt;
+ req->wrong_if = rt->mf6c_wrong_if;
+ } else
+ return(ESRCH);
+
+ return 0;
+}
+
+/*
+ * returns the input and output packet and byte counts on the mif provided
+ */
+static int
+get_mif6_cnt(req)
+ register struct sioc_mif_req6 *req;
+{
+ register mifi_t mifi = req->mifi;
+
+ if (mifi >= nummifs)
+ return EINVAL;
+
+ req->icount = mif6table[mifi].m6_pkt_in;
+ req->ocount = mif6table[mifi].m6_pkt_out;
+ req->ibytes = mif6table[mifi].m6_bytes_in;
+ req->obytes = mif6table[mifi].m6_bytes_out;
+
+ return 0;
+}
+
+static int
+set_pim6(i)
+ int *i;
+{
+ if ((*i != 1) && (*i != 0))
+ return EINVAL;
+
+ pim6 = *i;
+
+ return 0;
+}
+
+/*
+ * Enable multicast routing
+ */
+static int
+ip6_mrouter_init(so, m)
+ struct socket *so;
+ struct mbuf *m;
+{
+ int *v;
+
+#ifdef MRT6DEBUG
+ if (mrt6debug)
+ log(LOG_DEBUG,
+ "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
+ so->so_type, so->so_proto->pr_protocol);
+#endif
+
+ if (so->so_type != SOCK_RAW ||
+ so->so_proto->pr_protocol != IPPROTO_ICMPV6)
+ return EOPNOTSUPP;
+
+ if (!m || (m->m_len != sizeof(int *)))
+ return ENOPROTOOPT;
+
+ v = mtod(m, int *);
+ if (*v != 1)
+ return ENOPROTOOPT;
+
+ if (ip6_mrouter != NULL) return EADDRINUSE;
+
+ ip6_mrouter = so;
+
+ bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
+ bzero((caddr_t)nexpire, sizeof(nexpire));
+
+ pim6 = 0;/* used for stubbing out/in pim stuff */
+
+ expire_upcalls_ch =
+ timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
+
+#ifdef MRT6DEBUG
+ if (mrt6debug)
+ log(LOG_DEBUG, "ip6_mrouter_init\n");
+#endif
+
+ return 0;
+}
+
+/*
+ * Disable multicast routing
+ */
+int
+ip6_mrouter_done()
+{
+ mifi_t mifi;
+ int i;
+ struct ifnet *ifp;
+ struct in6_ifreq ifr;
+ struct mf6c *rt;
+ struct rtdetq *rte;
+ int s;
+
+ s = splnet();
+
+ /*
+ * For each phyint in use, disable promiscuous reception of all IPv6
+ * multicasts.
+ */
+#ifdef INET
+#ifdef MROUTING
+ /*
+ * If there is still IPv4 multicast routing daemon,
+ * we remain interfaces to receive all muliticasted packets.
+ * XXX: there may be an interface in which the IPv4 multicast
+ * daemon is not interested...
+ */
+ if (!ip_mrouter)
+#endif
+#endif
+ {
+ for (mifi = 0; mifi < nummifs; mifi++) {
+ if (mif6table[mifi].m6_ifp &&
+ !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
+ ifr.ifr_addr.sin6_family = AF_INET6;
+ ifr.ifr_addr.sin6_addr= in6addr_any;
+ ifp = mif6table[mifi].m6_ifp;
+ (*ifp->if_ioctl)(ifp, SIOCDELMULTI,
+ (caddr_t)&ifr);
+ }
+ }
+ }
+ bzero((caddr_t)mif6table, sizeof(mif6table));
+ nummifs = 0;
+
+ pim6 = 0; /* used to stub out/in pim specific code */
+
+ untimeout(expire_upcalls, (caddr_t)NULL, expire_upcalls_ch);
+
+ /*
+ * Free all multicast forwarding cache entries.
+ */
+ for (i = 0; i < MF6CTBLSIZ; i++) {
+ rt = mf6ctable[i];
+ while (rt) {
+ struct mf6c *frt;
+
+ for (rte = rt->mf6c_stall; rte != NULL; ) {
+ struct rtdetq *n = rte->next;
+
+ m_free(rte->m);
+ free(rte, M_MRTABLE);
+ rte = n;
+ }
+ frt = rt;
+ rt = rt->mf6c_next;
+ free(frt, M_MRTABLE);
+ }
+ }
+
+ bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
+
+ /*
+ * Reset de-encapsulation cache
+ */
+ reg_mif_num = -1;
+
+ ip6_mrouter = NULL;
+
+ splx(s);
+
+#ifdef MRT6DEBUG
+ if (mrt6debug)
+ log(LOG_DEBUG, "ip6_mrouter_done\n");
+#endif
+
+ return 0;
+}
+
+static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
+
+/*
+ * Add a mif to the mif table
+ */
+static int
+add_m6if(mifcp)
+ register struct mif6ctl *mifcp;
+{
+ register struct mif6 *mifp;
+ struct ifnet *ifp;
+ int error, s;
+
+ 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) {
+ multicast_register_if.if_name = "register_mif";
+ 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;
+
+ s = splnet();
+ error = if_allmulti(ifp, 1);
+ splx(s);
+ if (error)
+ return error;
+ }
+
+ s = splnet();
+ mifp->m6_flags = mifcp->mif6c_flags;
+ mifp->m6_ifp = ifp;
+ /* 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;
+ 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?
+ */
+ ifp = mifp->m6_ifp;
+
+ if_allmulti(ifp, 0);
+ }
+
+ 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 %p\n",
+ "multiple kernel entries",
+ ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
+ ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
+ mfccp->mf6cc_parent, 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 > UPCALL_MAX)
+ d = UPCALL_MAX;
+
+ ++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
+
+ /*
+ * 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_family = AF_INET6;
+ rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6);
+ rt->mf6c_origin.sin6_addr = ip6->ip6_src;
+ rt->mf6c_mcastgrp.sin6_family = AF_INET6;
+ rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6);
+ 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);
+ expire_upcalls_ch =
+ 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 int 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 && (m->m_flags & M_LOOP) == 0) {
+ /*
+ * Check the M_LOOP flag to avoid an
+ * unnecessary PIM assert.
+ * XXX: M_LOOP is an ad-hoc hack...
+ */
+ 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, NULL);
+
+#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;
+ /*
+ * We just call if_output instead of nd6_output here, since
+ * we need no ND for a multicast forwarded packet...right?
+ */
+ 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
+ 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 /* 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_int32_t+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_int32_t *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_int32_t *)(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 = if_simloop(mif6table[reg_mif_num].m6_ifp, m,
+ (struct sockaddr *) &dst, 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);
+}
diff --git a/sys/netinet6/ip6_mroute.h b/sys/netinet6/ip6_mroute.h
new file mode 100644
index 0000000..112ffbe
--- /dev/null
+++ b/sys/netinet6/ip6_mroute.h
@@ -0,0 +1,484 @@
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
+ *
+ * $FreeBSD$
+ */
+
+/* BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp */
+
+/*
+ * Definitions for IP multicast forwarding.
+ *
+ * Written by David Waitzman, BBN Labs, August 1988.
+ * Modified by Steve Deering, Stanford, February 1989.
+ * Modified by Ajit Thyagarajan, PARC, August 1993.
+ * Modified by Ajit Thyagarajan, PARC, August 1994.
+ * Modified by Ahmed Helmy, USC, September 1996.
+ *
+ * MROUTING Revision: 1.2
+ */
+
+#ifndef _NETINET6_IP6_MROUTE_H_
+#define _NETINET6_IP6_MROUTE_H_
+
+/*
+ * Multicast Routing set/getsockopt commands.
+ */
+#define MRT6_INIT 100 /* initialize forwarder */
+#define MRT6_DONE 101 /* shut down forwarder */
+#define MRT6_ADD_MIF 102 /* add multicast interface */
+#define MRT6_DEL_MIF 103 /* delete multicast interface */
+#define MRT6_ADD_MFC 104 /* insert forwarding cache entry */
+#define MRT6_DEL_MFC 105 /* delete forwarding cache entry */
+#define MRT6_PIM 107 /* enable pim code */
+
+#define GET_TIME(t) microtime(&t)
+
+/*
+ * Types and macros for handling bitmaps with one bit per multicast interface.
+ */
+typedef u_short mifi_t; /* type of a mif index */
+#define MAXMIFS 64
+
+#ifndef IF_SETSIZE
+#define IF_SETSIZE 256
+#endif
+
+typedef long if_mask;
+#define NIFBITS (sizeof(if_mask) * NBBY) /* bits per mask */
+
+#ifndef howmany
+#define howmany(x, y) (((x) + ((y) - 1)) / (y))
+#endif
+
+typedef struct if_set {
+ fd_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
+} if_set;
+
+#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
+#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
+#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
+#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
+#define IF_ZERO(p) bzero(p, sizeof(*(p)))
+
+/*
+ * Argument structure for MRT6_ADD_IF.
+ */
+struct mif6ctl {
+ mifi_t mif6c_mifi; /* the index of the mif to be added */
+ u_char mif6c_flags; /* MIFF_ flags defined below */
+ u_short mif6c_pifi; /* the index of the physical IF */
+};
+
+#define MIFF_REGISTER 0x1 /* mif represents a register end-point */
+
+/*
+ * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
+ */
+struct mf6cctl {
+ struct sockaddr_in6 mf6cc_origin; /* IPv6 origin of mcasts */
+ struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
+ mifi_t mf6cc_parent; /* incoming ifindex */
+ struct if_set mf6cc_ifset; /* set of forwarding ifs */
+};
+
+/*
+ * The kernel's multicast routing statistics.
+ */
+struct mrt6stat {
+ u_quad_t mrt6s_mfc_lookups; /* # forw. cache hash table hits */
+ u_quad_t mrt6s_mfc_misses; /* # forw. cache hash table misses */
+ u_quad_t mrt6s_upcalls; /* # calls to mrouted */
+ u_quad_t mrt6s_no_route; /* no route for packet's origin */
+ u_quad_t mrt6s_bad_tunnel; /* malformed tunnel options */
+ u_quad_t mrt6s_cant_tunnel; /* no room for tunnel options */
+ u_quad_t mrt6s_wrong_if; /* arrived on wrong interface */
+ u_quad_t mrt6s_upq_ovflw; /* upcall Q overflow */
+ u_quad_t mrt6s_cache_cleanups; /* # entries with no upcalls */
+ u_quad_t mrt6s_drop_sel; /* pkts dropped selectively */
+ u_quad_t mrt6s_q_overflow; /* pkts dropped - Q overflow */
+ u_quad_t mrt6s_pkt2large; /* pkts dropped - size > BKT SIZE */
+ u_quad_t mrt6s_upq_sockfull; /* upcalls dropped - socket full */
+};
+
+/*
+ * Struct used to communicate from kernel to multicast router
+ * note the convenient similarity to an IPv6 header.
+ */
+struct mrt6msg {
+ u_long unused1;
+ u_char im6_msgtype; /* what type of message */
+#define MRT6MSG_NOCACHE 1
+#define MRT6MSG_WRONGMIF 2
+#define MRT6MSG_WHOLEPKT 3 /* used for user level encap*/
+ u_char im6_mbz; /* must be zero */
+ u_char im6_mif; /* mif rec'd on */
+ u_char unused2;
+ struct in6_addr im6_src, im6_dst;
+};
+
+/*
+ * Argument structure used by multicast routing daemon to get src-grp
+ * packet counts
+ */
+struct sioc_sg_req6 {
+ struct sockaddr_in6 src;
+ struct sockaddr_in6 grp;
+ u_quad_t pktcnt;
+ u_quad_t bytecnt;
+ u_quad_t wrong_if;
+};
+
+/*
+ * Argument structure used by mrouted to get mif pkt counts
+ */
+struct sioc_mif_req6 {
+ mifi_t mifi; /* mif number */
+ u_quad_t icount; /* Input packet count on mif */
+ u_quad_t ocount; /* Output packet count on mif */
+ u_quad_t ibytes; /* Input byte count on mif */
+ u_quad_t obytes; /* Output byte count on mif */
+};
+
+#if defined(_KERNEL) || defined(KERNEL)
+/*
+ * The kernel's multicast-interface structure.
+ */
+struct mif6 {
+ u_char m6_flags; /* MIFF_ flags defined above */
+ u_int m6_rate_limit; /* max rate */
+ struct in6_addr m6_lcl_addr; /* local interface address */
+ struct ifnet *m6_ifp; /* pointer to interface */
+ u_quad_t m6_pkt_in; /* # pkts in on interface */
+ u_quad_t m6_pkt_out; /* # pkts out on interface */
+ u_quad_t m6_bytes_in; /* # bytes in on interface */
+ u_quad_t m6_bytes_out; /* # bytes out on interface */
+ struct route_in6 m6_route;/* cached route if this is a tunnel */
+};
+
+/*
+ * The kernel's multicast forwarding cache entry structure
+ */
+struct mf6c {
+ struct sockaddr_in6 mf6c_origin; /* IPv6 origin of mcasts */
+ struct sockaddr_in6 mf6c_mcastgrp; /* multicast group associated*/
+ mifi_t mf6c_parent; /* incoming IF */
+ struct if_set mf6c_ifset; /* set of outgoing IFs */
+ u_quad_t mf6c_pkt_cnt; /* pkt count for src-grp */
+ u_quad_t mf6c_byte_cnt; /* byte count for src-grp */
+ u_quad_t mf6c_wrong_if; /* wrong if for src-grp */
+ int mf6c_expire; /* time to clean entry up */
+ struct timeval mf6c_last_assert; /* last time I sent an assert*/
+ struct rtdetq *mf6c_stall; /* pkts waiting for route */
+ struct mf6c *mf6c_next; /* hash table linkage */
+};
+
+#define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
+
+/*
+ * Argument structure used for pkt info. while upcall is made
+ */
+#ifndef _NETINET_IP_MROUTE_H_
+struct rtdetq { /* XXX: rtdetq is also defined in ip_mroute.h */
+ struct mbuf *m; /* A copy of the packet */
+ struct ifnet *ifp; /* Interface pkt came in on */
+#ifdef UPCALL_TIMING
+ struct timeval t; /* Timestamp */
+#endif /* UPCALL_TIMING */
+ struct rtdetq *next;
+};
+#endif /* _NETINET_IP_MROUTE_H_ */
+
+#define MF6CTBLSIZ 256
+#if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0 /* from sys:route.h */
+#define MF6CHASHMOD(h) ((h) & (MF6CTBLSIZ - 1))
+#else
+#define MF6CHASHMOD(h) ((h) % MF6CTBLSIZ)
+#endif
+
+#define MAX_UPQ6 4 /* max. no of pkts in upcall Q */
+
+int ip6_mrouter_set __P((struct socket *so, struct sockopt *sopt));
+int ip6_mrouter_get __P((struct socket *so, struct sockopt *sopt));
+int ip6_mrouter_done __P((void));
+int mrt6_ioctl __P((int, caddr_t));
+#endif /* _KERNEL */
+
+#endif /* !_NETINET6_IP6_MROUTE_H_ */
+/*
+ * Copyright (C) 1998 WIDE Project.
+ * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
+ */
+
+/* BSDI ip_mroute.h,v 2.5 1996/10/11 16:01:48 pjd Exp */
+
+/*
+ * Definitions for IP multicast forwarding.
+ *
+ * Written by David Waitzman, BBN Labs, August 1988.
+ * Modified by Steve Deering, Stanford, February 1989.
+ * Modified by Ajit Thyagarajan, PARC, August 1993.
+ * Modified by Ajit Thyagarajan, PARC, August 1994.
+ * Modified by Ahmed Helmy, USC, September 1996.
+ *
+ * MROUTING Revision: 1.2
+ */
+
+#ifndef _NETINET6_IP6_MROUTE_H_
+#define _NETINET6_IP6_MROUTE_H_
+
+/*
+ * Multicast Routing set/getsockopt commands.
+ */
+#define MRT6_INIT 100 /* initialize forwarder */
+#define MRT6_DONE 101 /* shut down forwarder */
+#define MRT6_ADD_MIF 102 /* add multicast interface */
+#define MRT6_DEL_MIF 103 /* delete multicast interface */
+#define MRT6_ADD_MFC 104 /* insert forwarding cache entry */
+#define MRT6_DEL_MFC 105 /* delete forwarding cache entry */
+#define MRT6_PIM 107 /* enable pim code */
+
+#if BSD >= 199103
+#define GET_TIME(t) microtime(&t)
+#elif defined(sun)
+#define GET_TIME(t) uniqtime(&t)
+#else
+#define GET_TIME(t) ((t) = time)
+#endif
+
+/*
+ * Types and macros for handling bitmaps with one bit per multicast interface.
+ */
+typedef u_short mifi_t; /* type of a mif index */
+#define MAXMIFS 64
+
+#ifndef IF_SETSIZE
+#define IF_SETSIZE 256
+#endif
+
+typedef long if_mask;
+#define NIFBITS (sizeof(if_mask) * NBBY) /* bits per mask */
+
+#ifndef howmany
+#define howmany(x, y) (((x) + ((y) - 1)) / (y))
+#endif
+
+typedef struct if_set {
+ fd_mask ifs_bits[howmany(IF_SETSIZE, NIFBITS)];
+} if_set;
+
+#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
+#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
+#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
+#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
+#define IF_ZERO(p) bzero(p, sizeof(*(p)))
+
+/*
+ * Argument structure for MRT6_ADD_IF.
+ */
+struct mif6ctl {
+ mifi_t mif6c_mifi; /* the index of the mif to be added */
+ u_char mif6c_flags; /* MIFF_ flags defined below */
+ u_short mif6c_pifi; /* the index of the physical IF */
+#ifdef notyet
+ u_int mif6c_rate_limit; /* max rate */
+#endif
+};
+
+#define MIFF_REGISTER 0x1 /* mif represents a register end-point */
+
+/*
+ * Argument structure for MRT6_ADD_MFC and MRT6_DEL_MFC
+ */
+struct mf6cctl {
+ struct sockaddr_in6 mf6cc_origin; /* IPv6 origin of mcasts */
+ struct sockaddr_in6 mf6cc_mcastgrp; /* multicast group associated */
+ mifi_t mf6cc_parent; /* incoming ifindex */
+ struct if_set mf6cc_ifset; /* set of forwarding ifs */
+};
+
+/*
+ * The kernel's multicast routing statistics.
+ */
+struct mrt6stat {
+ u_quad_t mrt6s_mfc_lookups; /* # forw. cache hash table hits */
+ u_quad_t mrt6s_mfc_misses; /* # forw. cache hash table misses */
+ u_quad_t mrt6s_upcalls; /* # calls to mrouted */
+ u_quad_t mrt6s_no_route; /* no route for packet's origin */
+ u_quad_t mrt6s_bad_tunnel; /* malformed tunnel options */
+ u_quad_t mrt6s_cant_tunnel; /* no room for tunnel options */
+ u_quad_t mrt6s_wrong_if; /* arrived on wrong interface */
+ u_quad_t mrt6s_upq_ovflw; /* upcall Q overflow */
+ u_quad_t mrt6s_cache_cleanups; /* # entries with no upcalls */
+ u_quad_t mrt6s_drop_sel; /* pkts dropped selectively */
+ u_quad_t mrt6s_q_overflow; /* pkts dropped - Q overflow */
+ u_quad_t mrt6s_pkt2large; /* pkts dropped - size > BKT SIZE */
+ u_quad_t mrt6s_upq_sockfull; /* upcalls dropped - socket full */
+};
+
+/*
+ * Struct used to communicate from kernel to multicast router
+ * note the convenient similarity to an IPv6 header.
+ */
+struct mrt6msg {
+ u_long unused1;
+ u_char im6_msgtype; /* what type of message */
+#define MRT6MSG_NOCACHE 1
+#define MRT6MSG_WRONGMIF 2
+#define MRT6MSG_WHOLEPKT 3 /* used for user level encap*/
+ u_char im6_mbz; /* must be zero */
+ u_char im6_mif; /* mif rec'd on */
+ u_char unused2;
+ struct in6_addr im6_src, im6_dst;
+};
+
+/*
+ * Argument structure used by multicast routing daemon to get src-grp
+ * packet counts
+ */
+struct sioc_sg_req6 {
+ struct sockaddr_in6 src;
+ struct sockaddr_in6 grp;
+ u_quad_t pktcnt;
+ u_quad_t bytecnt;
+ u_quad_t wrong_if;
+};
+
+/*
+ * Argument structure used by mrouted to get mif pkt counts
+ */
+struct sioc_mif_req6 {
+ mifi_t mifi; /* mif number */
+ u_quad_t icount; /* Input packet count on mif */
+ u_quad_t ocount; /* Output packet count on mif */
+ u_quad_t ibytes; /* Input byte count on mif */
+ u_quad_t obytes; /* Output byte count on mif */
+};
+
+#if defined(_KERNEL) || defined(KERNEL)
+/*
+ * The kernel's multicast-interface structure.
+ */
+struct mif6 {
+ u_char m6_flags; /* MIFF_ flags defined above */
+ u_int m6_rate_limit; /* max rate */
+#ifdef notyet
+ struct tbf *m6_tbf; /* token bucket structure at intf. */
+#endif
+ struct in6_addr m6_lcl_addr; /* local interface address */
+ struct ifnet *m6_ifp; /* pointer to interface */
+ u_quad_t m6_pkt_in; /* # pkts in on interface */
+ u_quad_t m6_pkt_out; /* # pkts out on interface */
+ u_quad_t m6_bytes_in; /* # bytes in on interface */
+ u_quad_t m6_bytes_out; /* # bytes out on interface */
+ struct route_in6 m6_route;/* cached route if this is a tunnel */
+#ifdef notyet
+ u_int m6_rsvp_on; /* RSVP listening on this vif */
+ struct socket *m6_rsvpd; /* RSVP daemon socket */
+#endif
+};
+
+/*
+ * The kernel's multicast forwarding cache entry structure
+ */
+struct mf6c {
+ struct sockaddr_in6 mf6c_origin; /* IPv6 origin of mcasts */
+ struct sockaddr_in6 mf6c_mcastgrp; /* multicast group associated*/
+ mifi_t mf6c_parent; /* incoming IF */
+ struct if_set mf6c_ifset; /* set of outgoing IFs */
+
+ u_quad_t mf6c_pkt_cnt; /* pkt count for src-grp */
+ u_quad_t mf6c_byte_cnt; /* byte count for src-grp */
+ u_quad_t mf6c_wrong_if; /* wrong if for src-grp */
+ int mf6c_expire; /* time to clean entry up */
+ struct timeval mf6c_last_assert; /* last time I sent an assert*/
+ struct rtdetq *mf6c_stall; /* pkts waiting for route */
+ struct mf6c *mf6c_next; /* hash table linkage */
+};
+
+#define MF6C_INCOMPLETE_PARENT ((mifi_t)-1)
+
+/*
+ * Argument structure used for pkt info. while upcall is made
+ */
+#ifndef _NETINET_IP_MROUTE_H_
+struct rtdetq { /* XXX: rtdetq is also defined in ip_mroute.h */
+ struct mbuf *m; /* A copy of the packet */
+ struct ifnet *ifp; /* Interface pkt came in on */
+#ifdef UPCALL_TIMING
+ struct timeval t; /* Timestamp */
+#endif /* UPCALL_TIMING */
+ struct rtdetq *next;
+};
+#endif /* _NETINET_IP_MROUTE_H_ */
+
+#define MF6CTBLSIZ 256
+#if (MF6CTBLSIZ & (MF6CTBLSIZ - 1)) == 0 /* from sys:route.h */
+#define MF6CHASHMOD(h) ((h) & (MF6CTBLSIZ - 1))
+#else
+#define MF6CHASHMOD(h) ((h) % MF6CTBLSIZ)
+#endif
+
+#define MAX_UPQ6 4 /* max. no of pkts in upcall Q */
+
+#if defined(__FreeBSD__) && __FreeBSD__ >= 3
+int ip6_mrouter_set __P((struct socket *so, struct sockopt *sopt));
+int ip6_mrouter_get __P((struct socket *so, struct sockopt *sopt));
+#else
+int ip6_mrouter_set __P((int, struct socket *, struct mbuf *));
+int ip6_mrouter_get __P((int, struct socket *, struct mbuf **));
+#endif
+int ip6_mrouter_done __P((void));
+int mrt6_ioctl __P((int, caddr_t));
+#endif /* _KERNEL */
+
+#endif /* !_NETINET6_IP6_MROUTE_H_ */
diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c
index 73326c9..0909e9b 100644
--- a/sys/netinet6/ip6_output.c
+++ b/sys/netinet6/ip6_output.c
@@ -661,6 +661,25 @@ skip_ipsec2:;
* forbid loopback, loop back a copy.
*/
ip6_mloopback(ifp, m, dst);
+ } else {
+ /*
+ * If we are acting as a multicast router, perform
+ * multicast forwarding as if the packet had just
+ * arrived on the interface to which we are about
+ * to send. The multicast forwarding function
+ * recursively calls this function, using the
+ * IPV6_FORWARDING flag to prevent infinite recursion.
+ *
+ * Multicasts that are looped back by ip6_mloopback(),
+ * above, will be forwarded by the ip6_input() routine,
+ * if necessary.
+ */
+ if (ip6_mrouter && (flags & IPV6_FORWARDING) == 0) {
+ if (ip6_mforward(ip6, ifp, m) != NULL) {
+ m_freem(m);
+ goto done;
+ }
+ }
}
/*
* Multicasts with a hoplimit of zero may be looped back,
diff --git a/sys/netinet6/raw_ip6.c b/sys/netinet6/raw_ip6.c
index 9027663..bc881ac 100644
--- a/sys/netinet6/raw_ip6.c
+++ b/sys/netinet6/raw_ip6.c
@@ -87,6 +87,7 @@
#include <netinet/in_systm.h>
#include <netinet6/ip6.h>
#include <netinet6/ip6_var.h>
+#include <netinet6/ip6_mroute.h>
#include <netinet6/icmp6.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
@@ -419,6 +420,15 @@ rip6_ctloutput(so, sopt)
switch (sopt->sopt_dir) {
case SOPT_GET:
switch (sopt->sopt_name) {
+ case MRT6_INIT:
+ case MRT6_DONE:
+ case MRT6_ADD_MIF:
+ case MRT6_DEL_MIF:
+ case MRT6_ADD_MFC:
+ case MRT6_DEL_MFC:
+ case MRT6_PIM:
+ error = ip6_mrouter_get(so, sopt);
+ break;
default:
error = ip6_ctloutput(so, sopt);
break;
@@ -427,6 +437,15 @@ rip6_ctloutput(so, sopt)
case SOPT_SET:
switch (sopt->sopt_name) {
+ case MRT6_INIT:
+ case MRT6_DONE:
+ case MRT6_ADD_MIF:
+ case MRT6_DEL_MIF:
+ case MRT6_ADD_MFC:
+ case MRT6_DEL_MFC:
+ case MRT6_PIM:
+ error = ip6_mrouter_set(so, sopt);
+ break;
default:
error = ip6_ctloutput(so, sopt);
break;
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