#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/syslog.h>
#include <kern/locks.h>
#include <net/if.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet6/pim6.h>
#include <netinet6/pim6_var.h>
#ifndef __APPLE__
static MALLOC_DEFINE(M_MRTABLE, "mf6c", "multicast forwarding cache entry");
#endif
#define M_HASCL(m) ((m)->m_flags & M_EXT)
static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *);
static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
static int set_pim6(int *);
static int socket_send(struct socket *, struct mbuf *,
struct sockaddr_in6 *);
static int register_send(struct ip6_hdr *, struct mif6 *,
struct mbuf *);
extern lck_mtx_t *ip6_mutex;
struct socket *ip6_mrouter = NULL;
int ip6_mrouter_ver = 0;
int ip6_mrtproto = IPPROTO_PIM;
struct mrt6stat mrt6stat;
#define NO_RTE_FOUND 0x1
#define RTE_FOUND 0x2
struct mf6c *mf6ctable[MF6CTBLSIZ];
u_char n6expire[MF6CTBLSIZ];
static struct mif6 mif6table[MAXMIFS];
#if MRT6DEBUG
u_int mrt6debug = 0;
#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(void *);
#define EXPIRE_TIMEOUT (hz / 4)
#define UPCALL_EXPIRE 6
#if INET
#if MROUTING
extern struct socket *ip_mrouter;
#endif
#endif
struct ifnet multicast_register_if;
#define ENCAP_HOPS 64
static mifi_t nummifs = 0;
static mifi_t reg_mif_num = (mifi_t)-1;
static struct pim6stat pim6stat;
static int pim6;
#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])
#define MF6CFIND(o, g, rt) do { \
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++; \
} \
} while (0)
#define TV_DELTA(a, b, delta) do { \
int xxs; \
\
delta = (a).tv_usec - (b).tv_usec; \
if ((xxs = (a).tv_sec - (b).tv_sec)) { \
switch (xxs) { \
case 2: \
delta += 1000000; \
\
case 1: \
delta += 1000000; \
break; \
default: \
delta += (1000000 * xxs); \
} \
} \
} while (0)
#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
(a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
#if UPCALL_TIMING
#define UPCALL_MAX 50
u_long upcall_data[UPCALL_MAX + 1];
static void collate();
#endif
static int get_sg_cnt(struct sioc_sg_req6 *);
static int get_mif6_cnt(struct sioc_mif_req6 *);
static int ip6_mrouter_init(struct socket *, int, int);
static int add_m6if(struct mif6ctl *);
static int del_m6if(mifi_t *);
static int add_m6fc(struct mf6cctl *);
static int del_m6fc(struct mf6cctl *);
#ifndef __APPLE__
static struct callout expire_upcalls_ch;
#endif
int
ip6_mrouter_set(so, sopt)
struct socket *so;
struct sockopt *sopt;
{
int error = 0;
int optval;
struct mif6ctl mifc;
struct mf6cctl mfcc;
mifi_t mifi;
if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT)
return (EACCES);
switch (sopt->sopt_name) {
case MRT6_INIT:
#if MRT6_OINIT
case MRT6_OINIT:
#endif
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error)
break;
error = ip6_mrouter_init(so, optval, sopt->sopt_name);
break;
case MRT6_DONE:
error = ip6_mrouter_done();
break;
case MRT6_ADD_MIF:
error = sooptcopyin(sopt, &mifc, sizeof(mifc), sizeof(mifc));
if (error)
break;
error = add_m6if(&mifc);
break;
case MRT6_ADD_MFC:
error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc));
if (error)
break;
error = add_m6fc(&mfcc);
break;
case MRT6_DEL_MFC:
error = sooptcopyin(sopt, &mfcc, sizeof(mfcc), sizeof(mfcc));
if (error)
break;
error = del_m6fc(&mfcc);
break;
case MRT6_DEL_MIF:
error = sooptcopyin(sopt, &mifi, sizeof(mifi), sizeof(mifi));
if (error)
break;
error = del_m6if(&mifi);
break;
case MRT6_PIM:
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error)
break;
error = set_pim6(&optval);
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
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);
}
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;
case SIOCGETMIFCNT_IN6:
return(get_mif6_cnt((struct sioc_mif_req6 *)data));
break;
default:
return (EINVAL);
break;
}
return error;
}
static int
get_sg_cnt(req)
struct sioc_sg_req6 *req;
{
struct mf6c *rt;
MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
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);
#if 0
req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
#endif
return 0;
}
static int
get_mif6_cnt(req)
struct sioc_mif_req6 *req;
{
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;
}
static int
ip6_mrouter_init(so, v, cmd)
struct socket *so;
int v;
int cmd;
{
#if 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 (v != 1)
return (ENOPROTOOPT);
if (ip6_mrouter != NULL) return EADDRINUSE;
ip6_mrouter = so;
ip6_mrouter_ver = cmd;
bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
bzero((caddr_t)n6expire, sizeof(n6expire));
pim6 = 0;
#ifndef __APPLE__
callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
expire_upcalls, NULL);
#else
timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
#endif
#if MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "ip6_mrouter_init\n");
#endif
return 0;
}
int
ip6_mrouter_done()
{
mifi_t mifi;
int i;
struct ifnet *ifp;
struct in6_ifreq ifr;
struct mf6c *rt;
struct rtdetq *rte;
#if INET
#if MROUTING
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;
#ifdef __APPLE__
dlil_ioctl(0, ifp, SIOCDELMULTI,
(caddr_t)&ifr);
#else
(*ifp->if_ioctl)(ifp, SIOCDELMULTI,
(caddr_t)&ifr);
#endif
}
}
}
#if notyet
bzero((caddr_t)qtable, sizeof(qtable));
bzero((caddr_t)tbftable, sizeof(tbftable));
#endif
bzero((caddr_t)mif6table, sizeof(mif6table));
nummifs = 0;
pim6 = 0;
#ifndef __APPLE__
callout_stop(&expire_upcalls_ch);
#else
untimeout(expire_upcalls, (caddr_t)NULL);
#endif
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));
reg_mif_num = -1;
ip6_mrouter = NULL;
ip6_mrouter_ver = 0;
#if MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "ip6_mrouter_done\n");
#endif
return 0;
}
static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
static int
add_m6if(mifcp)
struct mif6ctl *mifcp;
{
struct mif6 *mifp;
struct ifnet *ifp;
int error;
#if notyet
struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
#endif
if (mifcp->mif6c_mifi >= MAXMIFS)
return EINVAL;
mifp = mif6table + mifcp->mif6c_mifi;
if (mifp->m6_ifp)
return EADDRINUSE;
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;
}
else {
if ((ifp->if_flags & IFF_MULTICAST) == 0)
return EOPNOTSUPP;
error = if_allmulti(ifp, 1);
if (error)
return error;
}
mifp->m6_flags = mifcp->mif6c_flags;
mifp->m6_ifp = ifp;
#if notyet
mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
#endif
mifp->m6_pkt_in = 0;
mifp->m6_pkt_out = 0;
mifp->m6_bytes_in = 0;
mifp->m6_bytes_out = 0;
if (nummifs <= mifcp->mif6c_mifi)
nummifs = mifcp->mif6c_mifi + 1;
#if 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;
}
static int
del_m6if(mifip)
mifi_t *mifip;
{
struct mif6 *mifp = mif6table + *mifip;
mifi_t mifi;
struct ifnet *ifp;
if (*mifip >= nummifs)
return EINVAL;
if (mifp->m6_ifp == NULL)
return EINVAL;
if (!(mifp->m6_flags & MIFF_REGISTER)) {
ifp = mifp->m6_ifp;
if_allmulti(ifp, 0);
}
#if notyet
bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip]));
bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
#endif
bzero((caddr_t)mifp, sizeof(*mifp));
for (mifi = nummifs; mifi > 0; mifi--)
if (mif6table[mifi - 1].m6_ifp)
break;
nummifs = mifi;
#if MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
#endif
return 0;
}
static int
add_m6fc(mfccp)
struct mf6cctl *mfccp;
{
struct mf6c *rt;
u_long hash;
struct rtdetq *rte;
u_short nstl;
int s;
MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
mfccp->mf6cc_mcastgrp.sin6_addr, rt);
if (rt) {
#if MRT6DEBUG
if (mrt6debug & DEBUG_MFC)
log(LOG_DEBUG,
"add_m6fc no upcall h %d 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
rt->mf6c_parent = mfccp->mf6cc_parent;
rt->mf6c_ifset = mfccp->mf6cc_ifset;
return 0;
}
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);
#if 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;
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
rt->mf6c_expire = 0;
n6expire[hash]--;
for (rte = rt->mf6c_stall; rte != NULL; ) {
struct rtdetq *n = rte->next;
ip6_mdq(rte->m, rte->ifp, rt);
m_freem(rte->m);
#if UPCALL_TIMING
collate(&(rte->t));
#endif
FREE(rte, M_MRTABLE);
rte = n;
}
rt->mf6c_stall = NULL;
}
}
if (nstl == 0) {
#if 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;
rt->mf6c_ifset = mfccp->mf6cc_ifset;
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
if (rt->mf6c_expire)
n6expire[hash]--;
rt->mf6c_expire = 0;
}
}
if (rt == NULL) {
rt = (struct mf6c *)_MALLOC(sizeof(*rt), M_MRTABLE,
M_NOWAIT);
if (rt == NULL) {
splx(s);
return ENOBUFS;
}
rt->mf6c_origin = mfccp->mf6cc_origin;
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
rt->mf6c_parent = mfccp->mf6cc_parent;
rt->mf6c_ifset = mfccp->mf6cc_ifset;
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
rt->mf6c_expire = 0;
rt->mf6c_stall = NULL;
rt->mf6c_next = mf6ctable[hash];
mf6ctable[hash] = rt;
}
}
return 0;
}
#if UPCALL_TIMING
static void
collate(t)
struct timeval *t;
{
u_long d;
struct timeval tp;
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
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;
origin = mfccp->mf6cc_origin;
mcastgrp = mfccp->mf6cc_mcastgrp;
hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
#if 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
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) {
return EADDRNOTAVAIL;
}
*nptr = rt->mf6c_next;
FREE(rt, M_MRTABLE);
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, NULL) != 0) {
sorwakeup(s);
return 0;
}
}
return -1;
}
int
ip6_mforward(ip6, ifp, m)
struct ip6_hdr *ip6;
struct ifnet *ifp;
struct mbuf *m;
{
struct mf6c *rt;
struct mif6 *mifp;
struct mbuf *mm;
int s;
mifi_t mifi;
struct timeval timenow;
#if MRT6DEBUG
if (mrt6debug & DEBUG_FORWARD)
log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst),
ifp->if_index);
#endif
if (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--;
getmicrotime(&timenow);
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
ip6stat.ip6s_cantforward++;
if (ip6_log_time + ip6_log_interval < timenow.tv_sec) {
ip6_log_time = timenow.tv_sec;
log(LOG_DEBUG,
"cannot forward "
"from %s to %s nxt %d received on %s\n",
ip6_sprintf(&ip6->ip6_src),
ip6_sprintf(&ip6->ip6_dst),
ip6->ip6_nxt,
if_name(m->m_pkthdr.rcvif));
}
return 0;
}
s = splnet();
MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
if (rt) {
splx(s);
return (ip6_mdq(m, ifp, rt));
} else {
struct mbuf *mb0;
struct rtdetq *rte;
u_long hash;
#if UPCALL_TIMING
struct timeval tp;
GET_TIME(tp);
#endif
mrt6stat.mrt6s_no_route++;
#if 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
rte = (struct rtdetq *)_MALLOC(sizeof(*rte), M_MRTABLE,
M_NOWAIT);
if (rte == NULL) {
splx(s);
return ENOBUFS;
}
mb0 = m_copy(m, 0, M_COPYALL);
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;
}
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;
#if MRT6_OINIT
struct omrt6msg *oim;
#endif
rt = (struct mf6c *)_MALLOC(sizeof(*rt), M_MRTABLE,
M_NOWAIT);
if (rt == NULL) {
FREE(rte, M_MRTABLE);
m_freem(mb0);
splx(s);
return ENOBUFS;
}
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;
}
sin6.sin6_addr = ip6->ip6_src;
im = NULL;
#if MRT6_OINIT
oim = NULL;
#endif
switch (ip6_mrouter_ver) {
#if MRT6_OINIT
case MRT6_OINIT:
oim = mtod(mm, struct omrt6msg *);
oim->im6_msgtype = MRT6MSG_NOCACHE;
oim->im6_mbz = 0;
break;
#endif
case MRT6_INIT:
im = mtod(mm, struct mrt6msg *);
im->im6_msgtype = MRT6MSG_NOCACHE;
im->im6_mbz = 0;
break;
default:
FREE(rte, M_MRTABLE);
m_freem(mb0);
FREE(rt, M_MRTABLE);
splx(s);
return EINVAL;
}
#if 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++)
;
switch (ip6_mrouter_ver) {
#if MRT6_OINIT
case MRT6_OINIT:
oim->im6_mif = mifi;
break;
#endif
case MRT6_INIT:
im->im6_mif = mifi;
break;
}
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++;
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;
n6expire[hash]++;
rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
rt->mf6c_next = mf6ctable[hash];
mf6ctable[hash] = rt;
rt->mf6c_stall = rte;
} else {
struct rtdetq **p;
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;
}
*p = rte;
}
rte->next = NULL;
rte->m = mb0;
rte->ifp = ifp;
#if UPCALL_TIMING
rte->t = tp;
#endif
splx(s);
return 0;
}
}
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 (n6expire[i] == 0)
continue;
nptr = &mf6ctable[i];
while ((mfc = *nptr) != NULL) {
rte = mfc->mf6c_stall;
if (rte != NULL &&
mfc->mf6c_expire != 0 &&
--mfc->mf6c_expire == 0) {
#if 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
do {
struct rtdetq *n = rte->next;
m_freem(rte->m);
FREE(rte, M_MRTABLE);
rte = n;
} while (rte != NULL);
mrt6stat.mrt6s_cache_cleanups++;
n6expire[i]--;
*nptr = mfc->mf6c_next;
FREE(mfc, M_MRTABLE);
} else {
nptr = &mfc->mf6c_next;
}
}
}
splx(s);
#ifndef __APPLE__
callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
expire_upcalls, NULL);
#else
timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
#endif
}
static int
ip6_mdq(m, ifp, rt)
struct mbuf *m;
struct ifnet *ifp;
struct mf6c *rt;
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
mifi_t mifi, iif;
struct mif6 *mifp;
int plen = m->m_pkthdr.len;
#define MC6_SEND(ip6, mifp, m) do { \
if ((mifp)->m6_flags & MIFF_REGISTER) \
register_send((ip6), (mifp), (m)); \
else \
phyint_send((ip6), (mifp), (m)); \
} while (0)
mifi = rt->mf6c_parent;
if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
#if 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 (mifi < nummifs && mif6table[mifi].m6_ifp)
if (pim6 && (m->m_flags & M_LOOP) == 0) {
static struct sockaddr_in6 sin6 =
{ sizeof(sin6), AF_INET6 };
struct mbuf *mm;
struct mrt6msg *im;
#if MRT6_OINIT
struct omrt6msg *oim;
#endif
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;
#if MRT6_OINIT
oim = NULL;
#endif
im = NULL;
switch (ip6_mrouter_ver) {
#if MRT6_OINIT
case MRT6_OINIT:
oim = mtod(mm, struct omrt6msg *);
oim->im6_msgtype = MRT6MSG_WRONGMIF;
oim->im6_mbz = 0;
break;
#endif
case MRT6_INIT:
im = mtod(mm, struct mrt6msg *);
im->im6_msgtype = MRT6MSG_WRONGMIF;
im->im6_mbz = 0;
break;
default:
m_freem(mm);
return EINVAL;
}
for (mifp = mif6table, iif = 0;
iif < nummifs && mifp &&
mifp->m6_ifp != ifp;
mifp++, iif++)
;
switch (ip6_mrouter_ver) {
#if MRT6_OINIT
case MRT6_OINIT:
oim->im6_mif = iif;
sin6.sin6_addr = oim->im6_src;
break;
#endif
case MRT6_INIT:
im->im6_mif = iif;
sin6.sin6_addr = im->im6_src;
break;
}
mrt6stat.mrt6s_upcalls++;
if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
#if MRT6DEBUG
if (mrt6debug)
log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
#endif
++mrt6stat.mrt6s_upq_sockfull;
return ENOBUFS;
}
}
return 0;
}
if (m->m_pkthdr.rcvif == NULL) {
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 (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++)
if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
if ((mif6table[rt->mf6c_parent].m6_flags &
MIFF_REGISTER) == 0 &&
(mif6table[mifi].m6_flags & MIFF_REGISTER) == 0 &&
(in6_addr2scopeid(ifp, &ip6->ip6_dst) !=
in6_addr2scopeid(mif6table[mifi].m6_ifp,
&ip6->ip6_dst) ||
in6_addr2scopeid(ifp, &ip6->ip6_src) !=
in6_addr2scopeid(mif6table[mifi].m6_ifp,
&ip6->ip6_src))) {
ip6stat.ip6s_badscope++;
continue;
}
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;
{
struct mbuf *mb_copy;
struct ifnet *ifp = mifp->m6_ifp;
int error = 0;
int s = splnet();
static struct route_in6 ro;
struct in6_multi *in6m;
struct sockaddr_in6 *dst6;
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) {
splx(s);
return;
}
mb_copy->m_flags |= M_MCAST;
if (m->m_pkthdr.rcvif == NULL) {
struct ip6_moptions im6o;
im6o.im6o_multicast_ifp = ifp;
im6o.im6o_multicast_hlim = ip6->ip6_hlim;
im6o.im6o_multicast_loop = 1;
error = ip6_output(mb_copy, NULL, &ro,
IPV6_FORWARDING, &im6o, NULL, 0);
#if MRT6DEBUG
if (mrt6debug & DEBUG_XMIT)
log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
mifp - mif6table, error);
#endif
splx(s);
return;
}
dst6 = (struct sockaddr_in6 *)&ro.ro_dst;
IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
if (in6m != NULL) {
dst6->sin6_len = sizeof(struct sockaddr_in6);
dst6->sin6_family = AF_INET6;
dst6->sin6_addr = ip6->ip6_dst;
ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst);
}
if (mb_copy->m_pkthdr.len <= ifp->if_mtu || ifp->if_mtu < IPV6_MMTU) {
dst6->sin6_len = sizeof(struct sockaddr_in6);
dst6->sin6_family = AF_INET6;
dst6->sin6_addr = ip6->ip6_dst;
#ifdef __APPLE__
mb_copy->m_pkthdr.rcvif = 0;
mb_copy->m_pkthdr.csum_data = 0;
mb_copy->m_pkthdr.csum_flags = 0;
lck_mtx_unlock(ip6_mutex);
error = dlil_output(ifp, PF_INET6, mb_copy,
NULL, (struct sockaddr *)&ro.ro_dst, 0);
lck_mtx_lock(ip6_mutex);
#else
error = (*ifp->if_output)(ifp, mb_copy,
(struct sockaddr *)&ro.ro_dst,
NULL);
#endif
#if MRT6DEBUG
if (mrt6debug & DEBUG_XMIT)
log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
mifp - mif6table, error);
#endif
} else {
#if MULTICAST_PMTUD
icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, ifp->if_mtu);
#else
#if MRT6DEBUG
if (mrt6debug & DEBUG_XMIT)
log(LOG_DEBUG,
"phyint_send: packet too big on %s o %s g %s"
" size %d(discarded)\n",
if_name(ifp),
ip6_sprintf(&ip6->ip6_src),
ip6_sprintf(&ip6->ip6_dst),
mb_copy->m_pkthdr.len);
#endif
m_freem(mb_copy);
#endif
}
splx(s);
}
static int
register_send(ip6, mif, m)
struct ip6_hdr *ip6;
struct mif6 *mif;
struct mbuf *m;
{
struct mbuf *mm;
int i, len = m->m_pkthdr.len;
static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
struct mrt6msg *im6;
#if 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;
MGETHDR(mm, M_DONTWAIT, MT_HEADER);
if (mm == NULL)
return ENOBUFS;
mm->m_pkthdr.rcvif = NULL;
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;
}
mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
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;
mrt6stat.mrt6s_upcalls++;
if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
#if MRT6DEBUG
if (mrt6debug)
log(LOG_WARNING,
"register_send: ip6_mrouter socket queue full\n");
#endif
++mrt6stat.mrt6s_upq_sockfull;
return ENOBUFS;
}
return 0;
}
int
pim6_input(mp, offp)
struct mbuf **mp;
int *offp;
{
struct pim *pim;
struct ip6_hdr *ip6;
int pimlen;
struct mbuf *m = *mp;
int minlen;
int off = *offp;
int proto;
++pim6stat.pim6s_rcv_total;
ip6 = mtod(m, struct ip6_hdr *);
pimlen = m->m_pkthdr.len - *offp;
proto = ip6->ip6_nxt;
if (pimlen < PIM_MINLEN) {
++pim6stat.pim6s_rcv_tooshort;
#if MRT6DEBUG
if (mrt6debug & DEBUG_PIM)
log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
#endif
m_freem(m);
return(IPPROTO_DONE);
}
minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, minlen, return IPPROTO_DONE);
ip6 = mtod(m, struct ip6_hdr *);
pim = (struct pim *)((caddr_t)ip6 + off);
#else
IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen);
if (pim == NULL) {
pim6stat.pim6s_rcv_tooshort++;
return IPPROTO_DONE;
}
#endif
#define PIM6_CHECKSUM
#ifdef PIM6_CHECKSUM
{
int cksumlen;
if (pim->pim_type == PIM_REGISTER)
cksumlen = PIM_MINLEN;
else
cksumlen = pimlen;
if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
++pim6stat.pim6s_rcv_badsum;
#if MRT6DEBUG
if (mrt6debug & DEBUG_PIM)
log(LOG_DEBUG,
"pim6_input: invalid checksum\n");
#endif
m_freem(m);
return(IPPROTO_DONE);
}
}
#endif
if (pim->pim_ver != PIM_VERSION) {
++pim6stat.pim6s_rcv_badversion;
#if 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) {
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)) {
#if 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;
if (pimlen < PIM6_REG_MINLEN) {
++pim6stat.pim6s_rcv_tooshort;
++pim6stat.pim6s_rcv_badregisters;
#if 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);
#if 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
if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
++pim6stat.pim6s_rcv_badregisters;
#if MRT6DEBUG
log(LOG_DEBUG, "pim6_input: invalid IP version (%d) "
"of the inner packet\n",
(eip6->ip6_vfc & IPV6_VERSION));
#endif
m_freem(m);
return(IPPROTO_NONE);
}
if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
++pim6stat.pim6s_rcv_badregisters;
#if 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);
}
mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
if (mcp == NULL) {
#if MRT6DEBUG
log(LOG_ERR,
"pim6_input: pim register: "
"could not copy register head\n");
#endif
m_freem(m);
return(IPPROTO_DONE);
}
m_adj(m, off + PIM_MINLEN);
#if 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
#ifdef __APPLE__
if (lo_ifp) {
lck_mtx_unlock(ip6_mutex);
dlil_output(lo_ifp, PF_INET6, m, 0, (struct sockaddr *)&dst, 0);
lck_mtx_lock(ip6_mutex);
}
else {
printf("Warning: pim6_input call to dlil_find_dltag failed!\n");
m_freem(m);
}
#else
rc = if_simloop(mif6table[reg_mif_num].m6_ifp, m,
dst.sin6_family, NULL);
#endif
m = mcp;
}
pim6_input_to_daemon:
rip6_input(&m, offp);
return(IPPROTO_DONE);
}