diff options
| -rw-r--r-- | sys/netinet6/ip6_input.c | 15 | ||||
| -rw-r--r-- | sys/netinet6/ip6_mroute.c | 1661 | ||||
| -rw-r--r-- | sys/netinet6/ip6_mroute.h | 484 | ||||
| -rw-r--r-- | sys/netinet6/ip6_output.c | 19 | ||||
| -rw-r--r-- | sys/netinet6/raw_ip6.c | 19 |
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; |
