#define _IP_VHL
#ifdef __FreeBSD__
#include "opt_ip6fw.h"
#endif
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
#include "opt_inet.h"
#ifdef __NetBSD__
#include "opt_ipsec.h"
#endif
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3)
#include <sys/proc.h>
#endif
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/netisr.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#if INET
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#endif
#include <netinet/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/ip6_var.h>
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) || defined (__APPLE__)
#include <netinet/in_pcb.h>
#endif
#if defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)
#include <netinet6/in6_pcb.h>
#endif
#include <netinet/icmp6.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/nd6.h>
#include <netinet6/in6_prefix.h>
#if MIP6
#include <netinet6/mip6.h>
#endif
#if IPV6FIREWALL
#include <netinet6/ip6_fw.h>
#endif
#include <netinet6/ip6protosw.h>
#ifndef __bsdi__
#include "loop.h"
#endif
#include "faith.h"
#include "gif.h"
#include "bpfilter.h"
#include <net/net_osdep.h>
extern struct domain inet6domain;
extern struct ip6protosw inet6sw[];
#ifdef __bsdi__
#if _BSDI_VERSION < 199802
extern struct ifnet loif;
#else
extern struct ifnet *loifp;
#endif
#endif
struct ip6protosw * ip6_protox[IPPROTO_MAX];
static int ip6qmaxlen = IFQ_MAXLEN;
struct in6_ifaddr *in6_ifaddr;
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 4)
struct ifqueue ip6intrq;
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__)
extern struct ifnet loif[NLOOP];
#endif
int ip6_forward_srcrt;
int ip6_sourcecheck;
int ip6_sourcecheck_interval;
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
const int int6intrq_present = 1;
#endif
#if IPV6FIREWALL
ip6_fw_chk_t *ip6_fw_chk_ptr;
ip6_fw_ctl_t *ip6_fw_ctl_ptr;
#endif
struct ip6stat ip6stat;
static void ip6_init2 __P((void *));
static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
#if PULLDOWN_TEST
static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
#endif
#if NATPT
extern int ip6_protocol_tr;
int natpt_in6 __P((struct mbuf *, struct mbuf **));
extern void ip_forward __P((struct mbuf *, int));
#endif
void
in6_dinit()
{ register int i;
register struct ip6protosw *pr;
register struct domain *dp;
static inet6domain_initted = 0;
extern int in6_proto_count;
if (!inet6domain_initted)
{
dp = &inet6domain;
for (i=0, pr = &inet6sw[0]; i<in6_proto_count; i++, pr++) {
if (net_add_proto(pr, dp))
printf("in6_dinit: warning net_add_proto failed for pr=%x proto #%d\n", pr, i);
}
inet6domain_initted = 1;
}
}
#ifdef MIP6
int (*mip6_new_packet_hook)(struct mbuf *m) = 0;
int (*mip6_route_optimize_hook)(struct mbuf *m) = 0;
#endif
void
ip6_init()
{
register struct protosw *pr;
register int i;
struct timeval tv;
pr = (struct protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
if (pr == 0)
panic("ip6_init");
for (i = 0; i < IPPROTO_MAX; i++)
ip6_protox[i] = pr;
for (pr = inet6domain.dom_protosw; pr; pr = pr->pr_next) {
if(!((unsigned int)pr->pr_domain)) continue;
if (pr->pr_domain->dom_family == PF_INET6 &&
pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) {
ip6_protox[pr->pr_protocol] = pr;
}
}
ip6intrq.ifq_maxlen = ip6qmaxlen;
nd6_init();
frag6_init();
#if IPV6FIREWALL
ip6_fw_init();
#endif
microtime(&tv);
ip6_flow_seq = random() ^ tv.tv_usec;
timeout(ip6_init2, (caddr_t)0, 6 * hz);
}
static void
ip6_init2(dummy)
void *dummy;
{
int ret;
#if defined(__bsdi__) && _BSDI_VERSION < 199802
struct ifnet *loifp = &loif;
#endif
#ifdef __APPLE__
boolean_t funnel_state;
funnel_state = thread_funnel_set(network_flock, TRUE);
#endif
ret = in6_ifattach_getifid(NULL);
in6_ifattach(&loif[0], IN6_IFT_LOOP, NULL, 0);
#if MIP6
mip6_init();
#endif
#import <gif.h>
#if NGIF > 0
gifattach();
#endif
#import <faith.h>
#if NFAITH > 0
faithattach();
#endif
timeout(nd6_timer_funneled, (caddr_t)0, hz);
timeout(in6_rr_timer_funneled, (caddr_t)0, hz);
#ifdef __APPLE__
(void) thread_funnel_set(network_flock, FALSE);
#endif
}
#if __FreeBSD__
SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init2, NULL);
#endif
void
ip6intr(void)
{
int s;
struct mbuf *m;
for (;;) {
s = splimp();
IF_DEQUEUE(&ip6intrq, m);
splx(s);
if (m == 0)
return;
ip6_input(m);
}
}
NETISR_SET(NETISR_IPV6, ip6intr);
extern struct route_in6 ip6_forward_rt;
void
ip6_input(m)
struct mbuf *m;
{
struct ip6_hdr *ip6;
int off = sizeof(struct ip6_hdr), nest;
u_int32_t plen;
u_int32_t rtalert = ~0;
int nxt = 0, ours = 0;
struct ifnet *deliverifp = NULL;
#if defined(__bsdi__) && _BSDI_VERSION < 199802
struct ifnet *loifp = &loif;
#endif
#if IPSEC
if (m) {
m->m_flags &= ~M_AUTHIPHDR;
m->m_flags &= ~M_AUTHIPDGM;
}
#endif
if (m->m_flags & M_EXT) {
if (m->m_next)
ip6stat.ip6s_mext2m++;
else
ip6stat.ip6s_mext1++;
} else {
if (m->m_next) {
if (m->m_flags & M_LOOP)
ip6stat.ip6s_m2m[loif[0].if_index]++;
else if (m->m_pkthdr.rcvif->if_index <= 31)
ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
else
ip6stat.ip6s_m2m[0]++;
} else
ip6stat.ip6s_m1++;
}
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
ip6stat.ip6s_total++;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), );
#endif
if (m->m_len < sizeof(struct ip6_hdr)) {
struct ifnet *inifp;
inifp = m->m_pkthdr.rcvif;
if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) {
ip6stat.ip6s_toosmall++;
in6_ifstat_inc(inifp, ifs6_in_hdrerr);
return;
}
}
ip6 = mtod(m, struct ip6_hdr *);
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
ip6stat.ip6s_badvers++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
goto bad;
}
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
#if IPV6FIREWALL
if (ip6_fw_chk_ptr) {
u_short port = 0;
if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) {
m_freem(m);
m = NULL;
}
if (!m)
return;
}
#endif
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
#if 0
if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
#endif
if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) ||
IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) {
if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
ours = 1;
deliverifp = m->m_pkthdr.rcvif;
goto hbhcheck;
} else {
ip6stat.ip6s_badscope++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
}
if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) {
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) {
ours = 1;
deliverifp = m->m_pkthdr.rcvif;
goto hbhcheck;
}
} else {
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src))
ip6->ip6_src.s6_addr16[1]
= htons(m->m_pkthdr.rcvif->if_index);
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst))
ip6->ip6_dst.s6_addr16[1]
= htons(m->m_pkthdr.rcvif->if_index);
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
struct in6_multi *in6m = 0;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
if (in6m)
ours = 1;
else if (!ip6_mrouter) {
ip6stat.ip6s_notmember++;
ip6stat.ip6s_cantforward++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
goto bad;
}
deliverifp = m->m_pkthdr.rcvif;
goto hbhcheck;
}
if (ip6_forward_rt.ro_rt == 0 ||
!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
&ip6_forward_rt.ro_dst.sin6_addr)) {
if (ip6_forward_rt.ro_rt) {
RTFREE(ip6_forward_rt.ro_rt);
ip6_forward_rt.ro_rt = 0;
}
bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6));
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6);
ip6_forward_rt.ro_dst.sin6_family = AF_INET6;
ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst;
#if __FreeBSD__ || defined(__APPLE__)
rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING);
#else
rtalloc((struct route *)&ip6_forward_rt);
#endif
}
#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
if (ip6_forward_rt.ro_rt &&
(ip6_forward_rt.ro_rt->rt_flags &
(RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
#if 0
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
&rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
#endif
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
struct in6_ifaddr *ia6 =
(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
if (ia6->ia6_flags & IN6_IFF_ANYCAST)
m->m_flags |= M_ANYCAST6;
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
ours = 1;
deliverifp = ia6->ia_ifp;
goto hbhcheck;
} else {
}
}
#if defined(NFAITH) && 0 < NFAITH
if (ip6_keepfaith) {
if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp
&& ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
ours = 1;
deliverifp = ip6_forward_rt.ro_rt->rt_ifp;
goto hbhcheck;
}
}
#endif
#if NATPT
if (ip6_protocol_tr)
{
struct mbuf *m1 = NULL;
switch (natpt_in6(m, &m1))
{
case IPPROTO_IP: goto processpacket;
case IPPROTO_IPV4: ip_forward(m1, 0); break;
case IPPROTO_IPV6: ip6_forward(m1, 0); break;
case IPPROTO_MAX:
default: break;
case IPPROTO_DONE:
return;
}
if (m != m1)
m_freem(m);
return;
}
processpacket:
#endif
#if 0
{
struct ifaddr *ifa;
for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first;
ifa;
ifa = ifa->ifa_list.tqe_next) {
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
ours = 1;
deliverifp = ifa->ifa_ifp;
goto hbhcheck;
}
}
}
#endif
if (!ip6_forwarding) {
ip6stat.ip6s_cantforward++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
goto bad;
}
hbhcheck:
plen = (u_int32_t)ntohs(ip6->ip6_plen);
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
struct ip6_hbh *hbh;
if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
#if 0
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
#endif
return;
}
ip6 = mtod(m, struct ip6_hdr *);
#ifndef PULLDOWN_TEST
hbh = (struct ip6_hbh *)(ip6 + 1);
#else
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
sizeof(struct ip6_hbh));
if (hbh == NULL) {
ip6stat.ip6s_tooshort++;
return;
}
#endif
nxt = hbh->ip6h_nxt;
if (rtalert != ~0 && ip6_forwarding)
ours = 1;
} else
nxt = ip6->ip6_nxt;
if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
ip6stat.ip6s_tooshort++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
goto bad;
}
if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
if (m->m_len == m->m_pkthdr.len) {
m->m_len = sizeof(struct ip6_hdr) + plen;
m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
} else
m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
ip6stat.ip6s_cantforward++;
m_freem(m);
return;
}
if (!ours) {
m_freem(m);
return;
}
} else if (!ours) {
ip6_forward(m, 0);
return;
}
ip6 = mtod(m, struct ip6_hdr *);
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
ip6stat.ip6s_badscope++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
goto bad;
}
#if defined(__NetBSD__) && defined(IFA_STATS)
if (IFA_STATS && deliverifp != NULL) {
struct in6_ifaddr *ia6;
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
if (ia6)
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
}
#endif
ip6stat.ip6s_delivered++;
in6_ifstat_inc(deliverifp, ifs6_in_deliver);
nest = 0;
#if MIP6
if (mip6_new_packet_hook)
(*mip6_new_packet_hook)(m);
#endif
while (nxt != IPPROTO_DONE) {
if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
ip6stat.ip6s_toomanyhdr++;
goto bad;
}
if (m->m_pkthdr.len == 0 || m->m_pkthdr.len < off) {
ip6stat.ip6s_tooshort++;
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
goto bad;
}
#if MIP6
if ((nxt != IPPROTO_HOPOPTS) && (nxt != IPPROTO_DSTOPTS) &&
(nxt != IPPROTO_ROUTING) && (nxt != IPPROTO_FRAGMENT) &&
(nxt != IPPROTO_ESP) && (nxt != IPPROTO_AH)) {
if (mip6_route_optimize_hook)
(*mip6_route_optimize_hook)(m);
}
#endif
nxt = (*ip6_protox[nxt]->pr_input)(&m, &off, nxt);
}
return;
bad:
m_freem(m);
}
static int
ip6_hopopts_input(plenp, rtalertp, mp, offp)
u_int32_t *plenp;
u_int32_t *rtalertp;
struct mbuf **mp;
int *offp;
{
register struct mbuf *m = *mp;
int off = *offp, hbhlen;
struct ip6_hbh *hbh;
u_int8_t *opt;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1);
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
hbhlen = (hbh->ip6h_len + 1) << 3;
IP6_EXTHDR_CHECK(m, off, hbhlen, -1);
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
if (hbh == NULL) {
ip6stat.ip6s_tooshort++;
return -1;
}
hbhlen = (hbh->ip6h_len + 1) << 3;
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
hbhlen);
if (hbh == NULL) {
ip6stat.ip6s_tooshort++;
return -1;
}
#endif
off += hbhlen;
hbhlen -= sizeof(struct ip6_hbh);
opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh);
if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
hbhlen, rtalertp, plenp) < 0)
return(-1);
*offp = off;
*mp = m;
return(0);
}
int
ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
struct mbuf *m;
u_int8_t *opthead;
int hbhlen;
u_int32_t *rtalertp;
u_int32_t *plenp;
{
struct ip6_hdr *ip6;
int optlen = 0;
u_int8_t *opt = opthead;
u_int16_t rtalert_val;
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
switch(*opt) {
case IP6OPT_PAD1:
optlen = 1;
break;
case IP6OPT_PADN:
if (hbhlen < IP6OPT_MINLEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
optlen = *(opt + 1) + 2;
break;
case IP6OPT_RTALERT:
if (hbhlen < IP6OPT_RTALERT_LEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2)
log(LOG_ERR, "length of router alert opt is inconsitent(%d)",
*(opt + 1));
optlen = IP6OPT_RTALERT_LEN;
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2);
*rtalertp = ntohs(rtalert_val);
break;
case IP6OPT_JUMBO:
if (hbhlen < IP6OPT_JUMBO_LEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2)
log(LOG_ERR, "length of jumbopayload opt "
"is inconsistent(%d)",
*(opt + 1));
optlen = IP6OPT_JUMBO_LEN;
#if 0
*plenp = ntohl(*(u_int32_t *)(opt + 2));
#else
bcopy(opt + 2, plenp, sizeof(*plenp));
*plenp = htonl(*plenp);
#endif
if (*plenp <= IPV6_MAXPACKET) {
ip6stat.ip6s_badoptions++;
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
sizeof(struct ip6_hdr) +
sizeof(struct ip6_hbh) +
opt + 2 - opthead);
return(-1);
}
ip6 = mtod(m, struct ip6_hdr *);
if (ip6->ip6_plen) {
ip6stat.ip6s_badoptions++;
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_HEADER,
sizeof(struct ip6_hdr) +
sizeof(struct ip6_hbh) +
opt - opthead);
return(-1);
}
break;
default:
if (hbhlen < IP6OPT_MINLEN) {
ip6stat.ip6s_toosmall++;
goto bad;
}
if ((optlen = ip6_unknown_opt(opt, m,
sizeof(struct ip6_hdr) +
sizeof(struct ip6_hbh) +
opt - opthead)) == -1)
return(-1);
optlen += 2;
break;
}
}
return(0);
bad:
m_freem(m);
return(-1);
}
int
ip6_unknown_opt(optp, m, off)
u_int8_t *optp;
struct mbuf *m;
int off;
{
struct ip6_hdr *ip6;
switch(IP6OPT_TYPE(*optp)) {
case IP6OPT_TYPE_SKIP:
return((int)*(optp + 1));
case IP6OPT_TYPE_DISCARD:
m_freem(m);
return(-1);
case IP6OPT_TYPE_FORCEICMP:
ip6stat.ip6s_badoptions++;
icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
return(-1);
case IP6OPT_TYPE_ICMP:
ip6stat.ip6s_badoptions++;
ip6 = mtod(m, struct ip6_hdr *);
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
(m->m_flags & (M_BCAST|M_MCAST)))
m_freem(m);
else
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_OPTION, off);
return(-1);
}
m_freem(m);
return(-1);
}
void
ip6_savecontrol(in6p, ip6, m, ctl, prevctlp)
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined(__APPLE__)
register struct inpcb *in6p;
#else
register struct in6pcb *in6p;
#endif
register struct ip6_hdr *ip6;
register struct mbuf *m;
struct ip6_recvpktopts *ctl, **prevctlp;
{
register struct mbuf **mp;
struct cmsghdr *cm = NULL;
struct ip6_recvpktopts *prevctl = NULL;
#if HAVE_NRL_INPCB
# define in6p_flags inp_flags
#endif
#if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined (__APPLE__)
struct proc *p = current_proc();
#endif
#ifdef __bsdi__
# define sbcreatecontrol so_cmsg
#endif
int privileged = 0;
if (ctl == NULL)
return;
bzero(ctl, sizeof(*ctl));
mp = &ctl->head;
if (prevctlp) {
if (*prevctlp == NULL) {
MALLOC(prevctl, struct ip6_recvpktopts *,
sizeof(*prevctl), M_IP6OPT, M_NOWAIT);
if (prevctl == NULL) {
printf("ip6_savecontrol: can't allocate "
" enough space for history\n");
return;
}
bzero(prevctl, sizeof(*prevctl));
*prevctlp = prevctl;
}
else
prevctl = *prevctlp;
}
#if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ == 3)
if (p && !suser(p->p_ucred, &p->p_acflag))
privileged++;
#elif defined(__FreeBSD__) && __FreeBSD__ >= 4
if (p && !suser(p))
privileged++;
#else
#if HAVE_NRL_INPCB
if ((in6p->inp_socket->so_state & SS_PRIV) != 0)
privileged++;
#else
if ((in6p->in6p_socket->so_state & SS_PRIV) != 0)
privileged++;
#endif
#endif
#if SO_TIMESTAMP
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
struct timeval tv;
microtime(&tv);
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
SCM_TIMESTAMP, SOL_SOCKET);
if (*mp) {
ctl->timestamp = *mp;
mp = &(*mp)->m_next;
}
}
#endif
if (in6p->in6p_flags & IN6P_PKTINFO) {
struct in6_pktinfo pi6, *prevpi = NULL;
bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr))
pi6.ipi6_addr.s6_addr16[1] = 0;
pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif)
? m->m_pkthdr.rcvif->if_index
: 0;
if (prevctl && prevctl->pktinfo) {
cm = mtod(prevctl->pktinfo, struct cmsghdr *);
prevpi = (struct in6_pktinfo *)CMSG_DATA(cm);
}
if (prevpi == NULL || bcmp(prevpi, &pi6, sizeof(pi6))) {
*mp = sbcreatecontrol((caddr_t) &pi6,
sizeof(struct in6_pktinfo),
IPV6_PKTINFO,
IPPROTO_IPV6);
if (*mp) {
ctl->pktinfo = *mp;
mp = &(*mp)->m_next;
}
}
}
if (in6p->in6p_flags & IN6P_HOPLIMIT) {
int hlim = ip6->ip6_hlim & 0xff, oldhlim = -1;
if (prevctl && prevctl->hlim) {
cm = mtod(prevctl->hlim, struct cmsghdr *);
oldhlim = (*(int *)CMSG_DATA(cm)) & 0xff;
}
if (oldhlim < 0 || hlim != oldhlim) {
*mp = sbcreatecontrol((caddr_t) &hlim,
sizeof(int), IPV6_HOPLIMIT,
IPPROTO_IPV6);
if (*mp) {
ctl->hlim = *mp;
mp = &(*mp)->m_next;
}
}
}
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) {
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
struct ip6_hbh *hbh, *prevhbh = NULL;
int hbhlen = 0, prevhbhlen = 0;
#ifdef PULLDOWN_TEST
struct mbuf *ext;
#endif
#ifndef PULLDOWN_TEST
hbh = (struct ip6_hbh *)(ip6 + 1);
hbhlen = (hbh->ip6h_len + 1) << 3;
#else
ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
ip6->ip6_nxt);
if (ext == NULL) {
ip6stat.ip6s_tooshort++;
return;
}
hbh = mtod(ext, struct ip6_hbh *);
hbhlen = (hbh->ip6h_len + 1) << 3;
if (hbhlen != ext->m_len) {
m_freem(ext);
ip6stat.ip6s_tooshort++;
return;
}
#endif
if (prevctl && prevctl->hbh) {
cm = mtod(prevctl->hbh, struct cmsghdr *);
prevhbh = (struct ip6_hbh *)CMSG_DATA(cm);
prevhbhlen = (prevhbh->ip6h_len + 1) << 3;
}
if (prevhbh == NULL || hbhlen != prevhbhlen ||
bcmp(prevhbh, hbh, hbhlen)) {
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen,
IPV6_HOPOPTS,
IPPROTO_IPV6);
if (*mp) {
ctl->hbh = *mp;
mp = &(*mp)->m_next;
}
}
#ifdef PULLDOWN_TEST
m_freem(ext);
#endif
}
}
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);
int rthdr = 0;
while (1) {
struct ip6_ext *ip6e = NULL;
int elen;
#ifdef PULLDOWN_TEST
struct mbuf *ext = NULL;
#endif
switch (nxt) {
case IPPROTO_DSTOPTS:
case IPPROTO_ROUTING:
case IPPROTO_HOPOPTS:
case IPPROTO_AH:
break;
default:
goto loopend;
}
#ifndef PULLDOWN_TEST
if (off + sizeof(*ip6e) > m->m_len)
goto loopend;
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off);
if (nxt == IPPROTO_AH)
elen = (ip6e->ip6e_len + 2) << 2;
else
elen = (ip6e->ip6e_len + 1) << 3;
if (off + elen > m->m_len)
goto loopend;
#else
ext = ip6_pullexthdr(m, off, nxt);
if (ext == NULL) {
ip6stat.ip6s_tooshort++;
return;
}
ip6e = mtod(ext, struct ip6_ext *);
if (nxt == IPPROTO_AH)
elen = (ip6e->ip6e_len + 2) << 2;
else
elen = (ip6e->ip6e_len + 1) << 3;
if (elen != ext->m_len) {
m_freem(ext);
ip6stat.ip6s_tooshort++;
return;
}
#endif
switch (nxt) {
case IPPROTO_DSTOPTS:
{
struct ip6_dest *prevdest1 = NULL,
*prevdest2 = NULL;
int prevdestlen;
if ((in6p->in6p_flags &
(IN6P_DSTOPTS | IN6P_RTHDRDSTOPTS)) == 0)
break;
if (!privileged)
break;
if (rthdr == 0 &&
(in6p->in6p_flags & IN6P_RTHDRDSTOPTS)) {
if (prevctl && prevctl->dest1) {
cm = mtod(prevctl->dest1,
struct cmsghdr *);
prevdest1 = (struct ip6_dest *)CMSG_DATA(cm);
prevdestlen = (prevdest1->ip6d_len + 1) << 3;
}
if (ctl->dest1 == NULL &&
(prevdest1 &&
prevdestlen == elen &&
bcmp(ip6e, prevdest1, elen) == 0))
break;
*mp = sbcreatecontrol((caddr_t)ip6e,
elen,
IPV6_RTHDRDSTOPTS,
IPPROTO_IPV6);
if (ctl->dest1 == NULL)
ctl->dest1 = *mp;
if (*mp)
mp = &(*mp)->m_next;
}
if (rthdr &&
(in6p->in6p_flags & IN6P_DSTOPTS)) {
if (prevctl && prevctl->dest2) {
cm = mtod(prevctl->dest2,
struct cmsghdr *);
prevdest2 = (struct ip6_dest *)CMSG_DATA(cm);
prevdestlen = (prevdest2->ip6d_len + 1) << 3;
}
if (ctl->dest2 == NULL &&
(prevdest2 &&
prevdestlen == elen &&
bcmp(ip6e, prevdest2, elen) == 0))
break;
*mp = sbcreatecontrol((caddr_t)ip6e,
elen,
IPV6_DSTOPTS,
IPPROTO_IPV6);
if (ctl->dest2 == NULL)
ctl->dest2 = *mp;
if (*mp)
mp = &(*mp)->m_next;
}
break;
}
case IPPROTO_ROUTING:
{
struct ip6_rthdr *prevrth = NULL;
int prevrhlen = 0;
rthdr++;
if (!in6p->in6p_flags & IN6P_RTHDR)
break;
if (prevctl && prevctl->rthdr) {
cm = mtod(prevctl->rthdr,
struct cmsghdr *);
prevrth = (struct ip6_rthdr *)CMSG_DATA(cm);
prevrhlen =
(prevrth->ip6r_len + 1) << 3;
}
if (ctl->rthdr == NULL && prevrth &&
prevrhlen == elen &&
bcmp(ip6e, prevrth, elen) == 0)
break;
*mp = sbcreatecontrol((caddr_t)ip6e, elen,
IPV6_RTHDR,
IPPROTO_IPV6);
if (ctl->rthdr == NULL)
ctl->rthdr = *mp;
if (*mp)
mp = &(*mp)->m_next;
break;
}
case IPPROTO_HOPOPTS:
case IPPROTO_AH:
break;
default:
#ifdef PULLDOWN_TEST
m_freem(ext);
#endif
goto loopend;
}
off += elen;
nxt = ip6e->ip6e_nxt;
ip6e = NULL;
#ifdef PULLDOWN_TEST
m_freem(ext);
ext = NULL;
#endif
}
loopend:
}
#ifdef __bsdi__
# undef sbcreatecontrol
#endif
#ifdef __OpenBSD__
# undef in6p_flags
#endif
}
#ifdef PULLDOWN_TEST
static struct mbuf *
ip6_pullexthdr(m, off, nxt)
struct mbuf *m;
size_t off;
int nxt;
{
struct ip6_ext ip6e;
size_t elen;
struct mbuf *n;
#ifdef DIAGNOSTIC
switch (nxt) {
case IPPROTO_DSTOPTS:
case IPPROTO_ROUTING:
case IPPROTO_HOPOPTS:
case IPPROTO_AH:
break;
default:
printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
}
#endif
m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
if (nxt == IPPROTO_AH)
elen = (ip6e.ip6e_len + 2) << 2;
else
elen = (ip6e.ip6e_len + 1) << 3;
MGET(n, M_DONTWAIT, MT_DATA);
if (n && elen >= MLEN) {
MCLGET(n, M_DONTWAIT);
if ((n->m_flags & M_EXT) == 0) {
m_free(n);
n = NULL;
}
}
if (!n)
return NULL;
n->m_len = 0;
if (elen >= M_TRAILINGSPACE(n)) {
m_free(n);
return NULL;
}
m_copydata(m, off, elen, mtod(n, caddr_t));
n->m_len = elen;
return n;
}
#endif
#define CLEAN_RECVOPT(old, type) \
do { \
if ((old)->type && (old)->type->m_next) { \
(old)->type->m_next = NULL; \
} \
} while (0)
#define MERGE_RECVOPT(new, old, type) if ((new)->type) {\
if ((old)->type)\
m_free((old)->type);\
(old)->type = m_copy((new)->type, 0, (new)->type->m_len);\
if (((old)->type) && ((old)->type->m_next)) {\
m_freem((old)->type);\
old->type = NULL;\
}\
}
#define LINK_RECVOPTS(opt, type, p) if ((opt)->type) {\
*(p) = (opt)->type;\
(p) = &(opt)->type->m_next;\
}
static void dump_inputopts __P((char *, struct ip6_recvpktopts *));
static void
dump_inputopts(str, p)
char *str;
struct ip6_recvpktopts *p;
{
#if 1
return;
#else
#define PRINT1(p, name) \
do { \
if (p->name) { \
printf(" %s: %p", #name, (p)->name); \
if (p->name->m_next) \
printf("[%p]", (p)->name->m_next); \
} \
} while (0)
printf("%s p=%p head=%p", str, p, p->head);
PRINT1(p, hlim);
PRINT1(p, pktinfo);
PRINT1(p, hbh);
PRINT1(p, dest1);
PRINT1(p, dest2);
PRINT1(p, rthdr);
printf("\n");
#undef PRINT1
#endif
}
void
ip6_update_recvpcbopt(old, new)
struct ip6_recvpktopts *new, *old;
{
struct mbuf **mp;
if (old == NULL) {
printf("ip6_update_recvpcbopt: invalid arguments\n");
return;
}
dump_inputopts("old before", old);
if (new)
dump_inputopts("new before", new);
#if 0
old->head = NULL;
CLEAN_RECVOPT(old, rthdr);
CLEAN_RECVOPT(old, dest2);
CLEAN_RECVOPT(old, dest1);
CLEAN_RECVOPT(old, hbh);
CLEAN_RECVOPT(old, pktinfo);
CLEAN_RECVOPT(old, hlim);
#endif
if (new) {
MERGE_RECVOPT(new, old, hlim);
MERGE_RECVOPT(new, old, pktinfo);
MERGE_RECVOPT(new, old, hbh);
MERGE_RECVOPT(new, old, dest1);
MERGE_RECVOPT(new, old, dest2);
MERGE_RECVOPT(new, old, rthdr);
}
dump_inputopts("old middle", old);
if (new)
dump_inputopts("new middle", new);
mp = &old->head;
LINK_RECVOPTS(old, hlim, mp);
LINK_RECVOPTS(old, pktinfo, mp);
LINK_RECVOPTS(old, hbh, mp);
LINK_RECVOPTS(old, dest1, mp);
LINK_RECVOPTS(old, dest2, mp);
LINK_RECVOPTS(old, rthdr, mp);
*mp = NULL;
dump_inputopts("old after", old);
if (new)
dump_inputopts("new after", new);
}
#undef MERGE_RECVOPT
#undef LINK_RECVOPTS
void
ip6_reset_rcvopt(opts, optname)
struct ip6_recvpktopts *opts;
int optname;
{
if (opts == NULL)
return;
switch(optname) {
case IPV6_RECVPKTINFO:
if (opts->pktinfo) m_free(opts->pktinfo);
opts->pktinfo = NULL;
break;
case IPV6_RECVHOPLIMIT:
if (opts->hlim) m_free(opts->hlim);
opts->hlim = NULL;
break;
case IPV6_RECVHOPOPTS:
if (opts->hbh) m_free(opts->hbh);
opts->hbh = NULL;
break;
case IPV6_RECVRTHDRDSTOPTS:
if (opts->dest1) m_free(opts->dest1);
opts->dest1 = NULL;
break;
case IPV6_RECVDSTOPTS:
if (opts->dest2) m_free(opts->dest2);
opts->dest2 = NULL;
break;
case IPV6_RECVRTHDR:
if (opts->rthdr) m_free(opts->rthdr);
opts->rthdr = NULL;
break;
default:
printf("ip6_reset_rcvopt: invalid option name (%d)\n",
optname);
return;
}
ip6_update_recvpcbopt(opts, NULL);
}
char *
ip6_get_prevhdr(m, off)
struct mbuf *m;
int off;
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
if (off == sizeof(struct ip6_hdr))
return(&ip6->ip6_nxt);
else {
int len, nxt;
struct ip6_ext *ip6e = NULL;
nxt = ip6->ip6_nxt;
len = sizeof(struct ip6_hdr);
while (len < off) {
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len);
switch(nxt) {
case IPPROTO_FRAGMENT:
len += sizeof(struct ip6_frag);
break;
case IPPROTO_AH:
len += (ip6e->ip6e_len + 2) << 2;
break;
default:
len += (ip6e->ip6e_len + 1) << 3;
break;
}
nxt = ip6e->ip6e_nxt;
}
if (ip6e)
return(&ip6e->ip6e_nxt);
else
return NULL;
}
}
int
ip6_nexthdr(m, off, proto, nxtp)
struct mbuf *m;
int off;
int proto;
int *nxtp;
{
struct ip6_hdr ip6;
struct ip6_ext ip6e;
struct ip6_frag fh;
if (m == NULL)
panic("ip6_nexthdr: m == NULL");
if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
return -1;
switch (proto) {
case IPPROTO_IPV6:
if (m->m_pkthdr.len < off + sizeof(ip6))
return -1;
m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6);
if (nxtp)
*nxtp = ip6.ip6_nxt;
off += sizeof(ip6);
return off;
case IPPROTO_FRAGMENT:
if (m->m_pkthdr.len < off + sizeof(fh))
return -1;
m_copydata(m, off, sizeof(fh), (caddr_t)&fh);
if ((ntohs(fh.ip6f_offlg) & IP6F_OFF_MASK) != 0)
return -1;
if (nxtp)
*nxtp = fh.ip6f_nxt;
off += sizeof(struct ip6_frag);
return off;
case IPPROTO_AH:
if (m->m_pkthdr.len < off + sizeof(ip6e))
return -1;
m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
if (nxtp)
*nxtp = ip6e.ip6e_nxt;
off += (ip6e.ip6e_len + 2) << 2;
return off;
case IPPROTO_HOPOPTS:
case IPPROTO_ROUTING:
case IPPROTO_DSTOPTS:
if (m->m_pkthdr.len < off + sizeof(ip6e))
return -1;
m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e);
if (nxtp)
*nxtp = ip6e.ip6e_nxt;
off += (ip6e.ip6e_len + 1) << 3;
return off;
case IPPROTO_NONE:
case IPPROTO_ESP:
case IPPROTO_IPCOMP:
return -1;
default:
return -1;
}
return -1;
}
int
ip6_lasthdr(m, off, proto, nxtp)
struct mbuf *m;
int off;
int proto;
int *nxtp;
{
int newoff;
int nxt;
if (!nxtp) {
nxt = -1;
nxtp = &nxt;
}
while (1) {
newoff = ip6_nexthdr(m, off, proto, nxtp);
if (newoff < 0)
return off;
else if (newoff < off)
return -1;
else if (newoff == off)
return newoff;
off = newoff;
proto = *nxtp;
}
}
u_char inet6ctlerrmap[PRC_NCMDS] = {
0, 0, 0, 0,
0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
EMSGSIZE, EHOSTUNREACH, 0, 0,
0, 0, 0, 0,
ENOPROTOOPT
};
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <vm/vm.h>
#include <sys/sysctl.h>
int
ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
if (namelen != 1)
return ENOTDIR;
switch (name[0]) {
case IPV6CTL_FORWARDING:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_forwarding);
case IPV6CTL_SENDREDIRECTS:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_sendredirects);
case IPV6CTL_DEFHLIM:
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_defhlim);
case IPV6CTL_MAXFRAGPACKETS:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_maxfragpackets);
case IPV6CTL_ACCEPT_RTADV:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_accept_rtadv);
case IPV6CTL_KEEPFAITH:
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_keepfaith);
case IPV6CTL_LOG_INTERVAL:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_log_interval);
case IPV6CTL_HDRNESTLIMIT:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_hdrnestlimit);
case IPV6CTL_DAD_COUNT:
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_dad_count);
case IPV6CTL_AUTO_FLOWLABEL:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_auto_flowlabel);
case IPV6CTL_DEFMCASTHLIM:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_defmcasthlim);
case IPV6CTL_GIF_HLIM:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_gif_hlim);
case IPV6CTL_KAME_VERSION:
return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION);
case IPV6CTL_USE_DEPRECATED:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_use_deprecated);
case IPV6CTL_RR_PRUNE:
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_rr_prune);
#if defined(__NetBSD__) && !defined(INET6_BINDV6ONLY)
case IPV6CTL_BINDV6ONLY:
return sysctl_int(oldp, oldlenp, newp, newlen,
&ip6_bindv6only);
#endif
default:
return EOPNOTSUPP;
}
}
#endif
#ifdef __bsdi__
int *ip6_sysvars[] = IPV6CTL_VARS;
int
ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
if (name[0] >= IPV6CTL_MAXID)
return (EOPNOTSUPP);
switch (name[0]) {
case IPV6CTL_STATS:
return sysctl_rdtrunc(oldp, oldlenp, newp, &ip6stat,
sizeof(ip6stat));
case IPV6CTL_KAME_VERSION:
return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION);
default:
return (sysctl_int_arr(ip6_sysvars, name, namelen,
oldp, oldlenp, newp, newlen));
}
}
#endif