Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. =================================================================== RCS file: /ftp/cvs/cvsroot/src/sys/netinet6/ip6_input.c,v rcsdiff: /ftp/cvs/cvsroot/src/sys/netinet6/ip6_input.c,v: warning: Unknown phrases like `commitid ...;' are present. retrieving revision 1.92 retrieving revision 1.221 diff -u -p -r1.92 -r1.221 --- src/sys/netinet6/ip6_input.c 2006/12/09 05:33:08 1.92 +++ src/sys/netinet6/ip6_input.c 2020/08/28 06:28:58 1.221 @@ -1,4 +1,4 @@ -/* $NetBSD: ip6_input.c,v 1.92 2006/12/09 05:33:08 dyoung Exp $ */ +/* $NetBSD: ip6_input.c,v 1.221 2020/08/28 06:28:58 ozaki-r Exp $ */ /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */ /* @@ -62,16 +62,18 @@ */ #include -__KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.92 2006/12/09 05:33:08 dyoung Exp $"); +__KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.221 2020/08/28 06:28:58 ozaki-r Exp $"); +#ifdef _KERNEL_OPT +#include "opt_gateway.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" -#include "opt_pfil_hooks.h" +#include "opt_net_mpsafe.h" +#endif #include #include -#include #include #include #include @@ -83,25 +85,28 @@ __KERNEL_RCSID(0, "$NetBSD: ip6_input.c, #include #include #include +#include +#include #include #include #include #include -#include -#ifdef PFIL_HOOKS +#include #include -#endif #include #include #ifdef INET #include +#include #include #endif /* INET */ #include +#include #include #include +#include #include #include #include @@ -109,55 +114,75 @@ __KERNEL_RCSID(0, "$NetBSD: ip6_input.c, #include #ifdef IPSEC -#include -#endif +#include +#include +#include +#endif /* IPSEC */ #include #include "faith.h" -#include "gif.h" - -#if NGIF > 0 -#include -#endif - -#include extern struct domain inet6domain; u_char ip6_protox[IPPROTO_MAX]; -static int ip6qmaxlen = IFQ_MAXLEN; -struct in6_ifaddr *in6_ifaddr; -struct ifqueue ip6intrq; - -extern struct callout in6_tmpaddrtimer_ch; - -int ip6_forward_srcrt; /* XXX */ -int ip6_sourcecheck; /* XXX */ -int ip6_sourcecheck_interval; /* XXX */ +pktqueue_t *ip6_pktq __read_mostly; -#ifdef PFIL_HOOKS -struct pfil_head inet6_pfil_hook; -#endif +pfil_head_t *inet6_pfil_hook; + +percpu_t *ip6stat_percpu; + +percpu_t *ip6_forward_rt_percpu __cacheline_aligned; + +static void ip6intr(void *); +static void ip6_input(struct mbuf *, struct ifnet *); +static bool ip6_badaddr(struct ip6_hdr *); +static struct m_tag *ip6_setdstifaddr(struct mbuf *, const struct in6_ifaddr *); -struct ip6stat ip6stat; +static struct m_tag *ip6_addaux(struct mbuf *); +static struct m_tag *ip6_findaux(struct mbuf *); +static void ip6_delaux(struct mbuf *); -static void ip6_init2 __P((void *)); -static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *)); +static int ip6_process_hopopts(struct mbuf *, u_int8_t *, int, u_int32_t *, + u_int32_t *); +static struct mbuf *ip6_pullexthdr(struct mbuf *, size_t, int); +static void sysctl_net_inet6_ip6_setup(struct sysctllog **); -static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); -static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int)); +#ifdef NET_MPSAFE +#define SOFTNET_LOCK() mutex_enter(softnet_lock) +#define SOFTNET_UNLOCK() mutex_exit(softnet_lock) +#else +#define SOFTNET_LOCK() KASSERT(mutex_owned(softnet_lock)) +#define SOFTNET_UNLOCK() KASSERT(mutex_owned(softnet_lock)) +#endif + +/* Ensure that non packed structures are the desired size. */ +__CTASSERT(sizeof(struct ip6_hdr) == 40); +__CTASSERT(sizeof(struct ip6_ext) == 2); +__CTASSERT(sizeof(struct ip6_hbh) == 2); +__CTASSERT(sizeof(struct ip6_dest) == 2); +__CTASSERT(sizeof(struct ip6_opt) == 2); +__CTASSERT(sizeof(struct ip6_opt_jumbo) == 6); +__CTASSERT(sizeof(struct ip6_opt_nsap) == 4); +__CTASSERT(sizeof(struct ip6_opt_tunnel) == 3); +__CTASSERT(sizeof(struct ip6_opt_router) == 4); +__CTASSERT(sizeof(struct ip6_rthdr) == 4); +__CTASSERT(sizeof(struct ip6_rthdr0) == 8); +__CTASSERT(sizeof(struct ip6_frag) == 8); /* * IP6 initialization: fill in IP6 protocol switch table. * All protocols not implemented in kernel go to raw IP6 protocol handler. */ void -ip6_init() +ip6_init(void) { const struct ip6protosw *pr; int i; + in6_init(); + + sysctl_net_inet6_ip6_setup(NULL); pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); if (pr == 0) panic("ip6_init"); @@ -168,88 +193,75 @@ ip6_init() if (pr->pr_domain->dom_family == PF_INET6 && pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) ip6_protox[pr->pr_protocol] = pr - inet6sw; - ip6intrq.ifq_maxlen = ip6qmaxlen; + + ip6_pktq = pktq_create(IFQ_MAXLEN, ip6intr, NULL); + KASSERT(ip6_pktq != NULL); + scope6_init(); addrsel_policy_init(); nd6_init(); frag6_init(); - ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR; - - ip6_init2((void *)0); -#ifdef PFIL_HOOKS +#ifdef GATEWAY + ip6flow_init(ip6_hashsize); +#endif /* Register our Packet Filter hook. */ - inet6_pfil_hook.ph_type = PFIL_TYPE_AF; - inet6_pfil_hook.ph_af = AF_INET6; - i = pfil_head_register(&inet6_pfil_hook); - if (i != 0) - printf("ip6_init: WARNING: unable to register pfil hook, " - "error %d\n", i); -#endif /* PFIL_HOOKS */ -} + inet6_pfil_hook = pfil_head_create(PFIL_TYPE_AF, (void *)AF_INET6); + KASSERT(inet6_pfil_hook != NULL); -static void -ip6_init2(void *dummy) -{ - - /* nd6_timer_init */ - callout_init(&nd6_timer_ch); - callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); - - /* timer for regeneranation of temporary addresses randomize ID */ - callout_init(&in6_tmpaddrtimer_ch); - callout_reset(&in6_tmpaddrtimer_ch, - (ip6_temp_preferred_lifetime - ip6_desync_factor - - ip6_temp_regen_advance) * hz, - in6_tmpaddrtimer, NULL); + ip6stat_percpu = percpu_alloc(sizeof(uint64_t) * IP6_NSTATS); + ip6_forward_rt_percpu = rtcache_percpu_alloc(); } /* * IP6 input interrupt handling. Just pass the packet to ip6_input. */ -void -ip6intr() +static void +ip6intr(void *arg __unused) { - int s; struct mbuf *m; - for (;;) { - s = splnet(); - IF_DEQUEUE(&ip6intrq, m); - splx(s); - if (m == 0) - return; - /* drop the packet if IPv6 operation is disabled on the IF */ - if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) { + SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); + while ((m = pktq_dequeue(ip6_pktq)) != NULL) { + struct psref psref; + struct ifnet *rcvif = m_get_rcvif_psref(m, &psref); + + if (rcvif == NULL) { m_freem(m); - return; + continue; } - ip6_input(m); + /* + * Drop the packet if IPv6 is disabled on the interface. + */ + if ((ND_IFINFO(rcvif)->flags & ND6_IFF_IFDISABLED)) { + m_put_rcvif_psref(rcvif, &psref); + m_freem(m); + continue; + } + ip6_input(m, rcvif); + m_put_rcvif_psref(rcvif, &psref); } + SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); } -extern struct route_in6 ip6_forward_rt; - -void -ip6_input(m) - struct mbuf *m; +static void +ip6_input(struct mbuf *m, struct ifnet *rcvif) { struct ip6_hdr *ip6; - int off = sizeof(struct ip6_hdr), nest; + int hit, off = sizeof(struct ip6_hdr), nest; u_int32_t plen; u_int32_t rtalert = ~0; - int nxt, ours = 0; + int nxt, ours = 0, rh_present = 0, frg_present; struct ifnet *deliverifp = NULL; int srcrt = 0; + struct rtentry *rt = NULL; + union { + struct sockaddr dst; + struct sockaddr_in6 dst6; + } u; + struct route *ro; -#ifdef IPSEC - /* - * should the inner packet be considered authentic? - * see comment in ah4_input(). - */ - m->m_flags &= ~M_AUTHIPHDR; - m->m_flags &= ~M_AUTHIPDGM; -#endif + KASSERT(rcvif != NULL); /* * make sure we don't have onion peering information into m_tag. @@ -261,25 +273,25 @@ ip6_input(m) */ if (m->m_flags & M_EXT) { if (m->m_next) - ip6stat.ip6s_mext2m++; + IP6_STATINC(IP6_STAT_MEXT2M); else - ip6stat.ip6s_mext1++; + IP6_STATINC(IP6_STAT_MEXT1); } else { -#define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0])) +#define M2MMAX 32 if (m->m_next) { - if (m->m_flags & M_LOOP) { - ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */ - } else if (m->m_pkthdr.rcvif->if_index < M2MMAX) - ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; + if (m->m_flags & M_LOOP) + /*XXX*/ IP6_STATINC(IP6_STAT_M2M + lo0ifp->if_index); + else if (rcvif->if_index < M2MMAX) + IP6_STATINC(IP6_STAT_M2M + rcvif->if_index); else - ip6stat.ip6s_m2m[0]++; + IP6_STATINC(IP6_STAT_M2M); } else - ip6stat.ip6s_m1++; + IP6_STATINC(IP6_STAT_M1); #undef M2MMAX } - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); - ip6stat.ip6s_total++; + in6_ifstat_inc(rcvif, ifs6_in_receive); + IP6_STATINC(IP6_STAT_TOTAL); /* * If the IPv6 header is not aligned, slurp it up into a new @@ -287,20 +299,18 @@ ip6_input(m) * it. Otherwise, if it is aligned, make sure the entire base * IPv6 header is in the first mbuf of the chain. */ - if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) { - struct ifnet *inifp = m->m_pkthdr.rcvif; + if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) { if ((m = m_copyup(m, sizeof(struct ip6_hdr), - (max_linkhdr + 3) & ~3)) == NULL) { + (max_linkhdr + 3) & ~3)) == NULL) { /* XXXJRT new stat, please */ - ip6stat.ip6s_toosmall++; - in6_ifstat_inc(inifp, ifs6_in_hdrerr); + IP6_STATINC(IP6_STAT_TOOSMALL); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); return; } } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) { - struct ifnet *inifp = m->m_pkthdr.rcvif; if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) { - ip6stat.ip6s_toosmall++; - in6_ifstat_inc(inifp, ifs6_in_hdrerr); + IP6_STATINC(IP6_STAT_TOOSMALL); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); return; } } @@ -308,94 +318,70 @@ ip6_input(m) 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); + IP6_STATINC(IP6_STAT_BADVERS); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); + goto bad; + } + + if (ip6_badaddr(ip6)) { + IP6_STATINC(IP6_STAT_BADSCOPE); + in6_ifstat_inc(rcvif, ifs6_in_addrerr); goto bad; } -#ifdef PFIL_HOOKS + /* + * Assume that we can create a fast-forward IP flow entry + * based on this packet. + */ + m->m_flags |= M_CANFASTFWD; + /* * Run through list of hooks for input packets. If there are any * filters which require that additional packets in the flow are * not fast-forwarded, they must clear the M_CANFASTFWD flag. * Note that filters must _never_ set this flag, as another filter * in the list may have previously cleared it. + * + * Don't call hooks if the packet has already been processed by + * IPsec (encapsulated, tunnel mode). */ - /* - * let ipfilter look at packet on the wire, - * not the decapsulated packet. - */ -#ifdef IPSEC - if (!ipsec_getnhist(m)) +#if defined(IPSEC) + if (!ipsec_used || !ipsec_skip_pfil(m)) #else if (1) #endif { struct in6_addr odst; + int error; odst = ip6->ip6_dst; - if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, - PFIL_IN) != 0) - return; - if (m == NULL) + error = pfil_run_hooks(inet6_pfil_hook, &m, rcvif, PFIL_IN); + if (error != 0 || m == NULL) { + IP6_STATINC(IP6_STAT_PFILDROP_IN); return; + } + if (m->m_len < sizeof(struct ip6_hdr)) { + if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) { + IP6_STATINC(IP6_STAT_TOOSMALL); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); + return; + } + } ip6 = mtod(m, struct ip6_hdr *); srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst); } -#endif /* PFIL_HOOKS */ - ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; + IP6_STATINC(IP6_STAT_NXTHIST + ip6->ip6_nxt); #ifdef ALTQ - if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { - /* packet is dropped by traffic conditioner */ - return; - } -#endif - - /* - * Check against address spoofing/corruption. - */ - if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || - IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) { - /* - * XXX: "badscope" is not very suitable for a multicast source. - */ - ip6stat.ip6s_badscope++; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); - goto bad; - } - /* - * The following check is not documented in specs. A malicious - * party may be able to use IPv4 mapped addr to confuse tcp/udp stack - * and bypass security checks (act as if it was from 127.0.0.1 by using - * IPv6 src ::ffff:127.0.0.1). Be cautious. - * - * This check chokes if we are in an SIIT cloud. As none of BSDs - * support IPv4-less kernel compilation, we cannot support SIIT - * environment at all. So, it makes more sense for us to reject any - * malicious packets for non-SIIT environment, than try to do a - * partial support for SIIT environment. - */ - 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 0 - /* - * Reject packets with IPv4 compatible addresses (auto tunnel). - * - * The code forbids auto tunnel relay case in RFC1933 (the check is - * stronger than RFC1933). We may want to re-enable it if mech-xx - * is revised to forbid relaying case. - */ - 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; + if (altq_input != NULL) { + SOFTNET_LOCK(); + if ((*altq_input)(m, AF_INET6) == 0) { + SOFTNET_UNLOCK(); + /* packet is dropped by traffic conditioner */ + return; + } + SOFTNET_UNLOCK(); } #endif @@ -407,118 +393,119 @@ ip6_input(m) * to the usage conflict. * in6_setscope() then also checks and rejects the cases where src or * dst are the loopback address and the receiving interface - * is not loopback. + * is not loopback. */ if (__predict_false( m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT))) goto bad; ip6 = mtod(m, struct ip6_hdr *); if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) { - ip6stat.ip6s_badscope++; /* XXX */ + IP6_STATINC(IP6_STAT_BADSCOPE); /* XXX */ goto bad; } - if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) || - in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) { - ip6stat.ip6s_badscope++; + if (in6_setscope(&ip6->ip6_src, rcvif, NULL) || + in6_setscope(&ip6->ip6_dst, rcvif, NULL)) { + IP6_STATINC(IP6_STAT_BADSCOPE); goto bad; } + ro = rtcache_percpu_getref(ip6_forward_rt_percpu); + /* * Multicast check */ if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { - struct in6_multi *in6m = 0; + bool ingroup; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast); + in6_ifstat_inc(rcvif, ifs6_in_mcast); /* * See if we belong to the destination multicast group on the * arrival interface. */ - IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m); - if (in6m) + ingroup = in6_multi_group(&ip6->ip6_dst, rcvif); + if (ingroup) { ours = 1; - else if (!ip6_mrouter) { - ip6stat.ip6s_notmember++; - ip6stat.ip6s_cantforward++; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); - goto bad; + } else if (!ip6_mrouter) { + uint64_t *ip6s = IP6_STAT_GETREF(); + ip6s[IP6_STAT_NOTMEMBER]++; + ip6s[IP6_STAT_CANTFORWARD]++; + IP6_STAT_PUTREF(); + in6_ifstat_inc(rcvif, ifs6_in_discard); + goto bad_unref; } - deliverifp = m->m_pkthdr.rcvif; + deliverifp = rcvif; goto hbhcheck; } + sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0); + /* - * Unicast check + * Unicast check */ - if (ip6_forward_rt.ro_rt != NULL && - (ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && - IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, - &((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr)) - ip6stat.ip6s_forward_cachehit++; - else { - struct sockaddr_in6 *dst6; - - if (ip6_forward_rt.ro_rt != NULL) { - /* route is down or destination is different */ - ip6stat.ip6s_forward_cachemiss++; - rtflush((struct route *)&ip6_forward_rt); - } - - bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); - dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst; - dst6->sin6_len = sizeof(struct sockaddr_in6); - dst6->sin6_family = AF_INET6; - dst6->sin6_addr = ip6->ip6_dst; - - rtalloc((struct route *)&ip6_forward_rt); - } - -#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) + rt = rtcache_lookup2(ro, &u.dst, 1, &hit); + if (hit) + IP6_STATINC(IP6_STAT_FORWARD_CACHEHIT); + else + IP6_STATINC(IP6_STAT_FORWARD_CACHEMISS); /* * Accept the packet if the forwarding interface to the destination - * according to the routing table is the loopback interface, + * (according to the routing table) is the loopback interface, * unless the associated route has a gateway. + * + * We don't explicitly match ip6_dst against an interface here. It + * is already done in rtcache_lookup2: rt->rt_ifp->if_type will be + * IFT_LOOP if the packet is for us. + * * Note that this approach causes to accept a packet if there is a * route to the loopback interface for the destination of the packet. * But we think it's even useful in some situations, e.g. when using * a special daemon which wants to intercept the packet. */ - if (ip6_forward_rt.ro_rt != NULL && - (ip6_forward_rt.ro_rt->rt_flags & - (RTF_HOST|RTF_GATEWAY)) == RTF_HOST && - !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) && -#if 0 - /* - * The check below is redundant since the comparison of - * the destination and the key of the rtentry has - * already done through looking up the routing table. - */ - 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 (rt != NULL && + (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST && + rt->rt_ifp->if_type == IFT_LOOP) { + struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa; + int addrok; + if (ia6->ia6_flags & IN6_IFF_ANYCAST) m->m_flags |= M_ANYCAST6; /* * packets to a tentative, duplicated, or somehow invalid * address must not be accepted. */ - if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { + if (ia6->ia6_flags & IN6_IFF_NOTREADY) + addrok = 0; + else if (ia6->ia6_flags & IN6_IFF_DETACHED && + !IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) + { + /* Allow internal traffic to DETACHED addresses */ + struct sockaddr_in6 sin6; + int s; + + memset(&sin6, 0, sizeof(sin6)); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof(sin6); + sin6.sin6_addr = ip6->ip6_src; + s = pserialize_read_enter(); + addrok = (ifa_ifwithaddr(sin6tosa(&sin6)) != NULL); + pserialize_read_exit(s); + } else + addrok = 1; + if (addrok) { /* this address is ready */ ours = 1; deliverifp = ia6->ia_ifp; /* correct? */ goto hbhcheck; } else { /* address is not ready, so discard the packet. */ - nd6log((LOG_INFO, - "ip6_input: packet to an unready address %s->%s\n", - ip6_sprintf(&ip6->ip6_src), - ip6_sprintf(&ip6->ip6_dst))); + char ip6bufs[INET6_ADDRSTRLEN]; + char ip6bufd[INET6_ADDRSTRLEN]; + nd6log(LOG_INFO, "packet to an unready address %s->%s\n", + IN6_PRINT(ip6bufs, &ip6->ip6_src), + IN6_PRINT(ip6bufd, &ip6->ip6_dst)); - goto bad; + goto bad_unref; } } @@ -527,69 +514,47 @@ ip6_input(m) */ #if defined(NFAITH) && 0 < NFAITH if (ip6_keepfaith) { - if (ip6_forward_rt.ro_rt != NULL && - ip6_forward_rt.ro_rt->rt_ifp != NULL && - ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) { + if (rt != NULL && rt->rt_ifp != NULL && + rt->rt_ifp->if_type == IFT_FAITH) { /* XXX do we need more sanity checks? */ ours = 1; - deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */ + deliverifp = rt->rt_ifp; /* faith */ goto hbhcheck; } } #endif -#if 0 - { - /* - * Last resort: check in6_ifaddr for incoming interface. - * The code is here until I update the "goto ours hack" code above - * working right. - */ - struct ifaddr *ifa; - TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) { - if (ifa->ifa_addr == NULL) - continue; /* just for safety */ - 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 - /* * Now there is no reason to process the packet if it's not our own * and we're not a router. */ if (!ip6_forwarding) { - ip6stat.ip6s_cantforward++; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); - goto bad; + IP6_STATINC(IP6_STAT_CANTFORWARD); + in6_ifstat_inc(rcvif, ifs6_in_discard); + goto bad_unref; } - hbhcheck: +hbhcheck: /* - * record address information into m_tag, if we don't have one yet. - * note that we are unable to record it, if the address is not listed + * Record address information into m_tag, if we don't have one yet. + * Note that we are unable to record it, if the address is not listed * as our interface address (e.g. multicast addresses, addresses * within FAITH prefixes and such). */ - if (deliverifp && !ip6_getdstifaddr(m)) { + if (deliverifp && ip6_getdstifaddr(m) == NULL) { struct in6_ifaddr *ia6; + int s = pserialize_read_enter(); ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); - if (ia6) { - if (!ip6_setdstifaddr(m, ia6)) { - /* - * XXX maybe we should drop the packet here, - * as we could not provide enough information - * to the upper layers. - */ - } + /* Depends on ip6_setdstifaddr never sleep */ + if (ia6 != NULL && ip6_setdstifaddr(m, ia6) == NULL) { + /* + * XXX maybe we should drop the packet here, + * as we could not provide enough information + * to the upper layers. + */ } + pserialize_read_exit(s); } /* @@ -602,10 +567,11 @@ ip6_input(m) struct ip6_hbh *hbh; if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) { -#if 0 /*touches NULL pointer*/ - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); -#endif - return; /* m have already been freed */ + /* m already freed */ + in6_ifstat_inc(rcvif, ifs6_in_discard); + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); + return; } /* adjust pointer */ @@ -622,18 +588,22 @@ ip6_input(m) * contained, ip6_hopopts_input() must set a valid * (non-zero) payload length to the variable plen. */ - ip6stat.ip6s_badoptions++; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); + IP6_STATINC(IP6_STAT_BADOPTIONS); + in6_ifstat_inc(rcvif, ifs6_in_discard); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, - (caddr_t)&ip6->ip6_plen - (caddr_t)ip6); + (char *)&ip6->ip6_plen - (char *)ip6); + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); return; } IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); if (hbh == NULL) { - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_TOOSHORT); + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); return; } KASSERT(IP6_HDR_ALIGNED_P(hbh)); @@ -649,15 +619,14 @@ ip6_input(m) nxt = ip6->ip6_nxt; /* - * Check that the amount of data in the buffers - * is as at least much as the IPv6 header would have us expect. - * Trim mbufs if longer than we expect. - * Drop packet if shorter than we expect. + * Check that the amount of data in the buffers is at least much as + * the IPv6 header would have us expect. Trim mbufs if longer than we + * expect. Drop packet if shorter than we expect. */ 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; + IP6_STATINC(IP6_STAT_TOOSHORT); + in6_ifstat_inc(rcvif, ifs6_in_truncated); + goto bad_unref; } if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) { if (m->m_len == m->m_pkthdr.len) { @@ -679,17 +648,26 @@ ip6_input(m) * 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; + if (ip6_mrouter != NULL) { + int error; + + SOFTNET_LOCK(); + error = ip6_mforward(ip6, rcvif, m); + SOFTNET_UNLOCK(); + + if (error != 0) { + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); + IP6_STATINC(IP6_STAT_CANTFORWARD); + goto bad; + } } + if (!ours) + goto bad_unref; } else if (!ours) { - ip6_forward(m, srcrt); + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); + ip6_forward(m, srcrt, rcvif); return; } @@ -706,87 +684,167 @@ ip6_input(m) */ 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; + IP6_STATINC(IP6_STAT_BADSCOPE); + in6_ifstat_inc(rcvif, ifs6_in_addrerr); + goto bad_unref; } - /* - * Tell launch routine the next header - */ #ifdef IFA_STATS if (deliverifp != NULL) { struct in6_ifaddr *ia6; + int s = pserialize_read_enter(); ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); if (ia6) ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; + pserialize_read_exit(s); } #endif - ip6stat.ip6s_delivered++; + IP6_STATINC(IP6_STAT_DELIVERED); in6_ifstat_inc(deliverifp, ifs6_in_deliver); nest = 0; + if (rt != NULL) { + rtcache_unref(rt, ro); + rt = NULL; + } + rtcache_percpu_putref(ip6_forward_rt_percpu); + + rh_present = 0; + frg_present = 0; while (nxt != IPPROTO_DONE) { if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { - ip6stat.ip6s_toomanyhdr++; + IP6_STATINC(IP6_STAT_TOOMANYHDR); + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); goto bad; } + M_VERIFY_PACKET(m); + /* * protection against faulty packet - there should be * more sanity checks in header chain processing. */ if (m->m_pkthdr.len < off) { - ip6stat.ip6s_tooshort++; - in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); + IP6_STATINC(IP6_STAT_TOOSHORT); + in6_ifstat_inc(rcvif, ifs6_in_truncated); goto bad; } + if (nxt == IPPROTO_ROUTING) { + if (rh_present++) { + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); + IP6_STATINC(IP6_STAT_BADOPTIONS); + goto bad; + } + } else if (nxt == IPPROTO_FRAGMENT) { + if (frg_present++) { + in6_ifstat_inc(rcvif, ifs6_in_hdrerr); + IP6_STATINC(IP6_STAT_BADOPTIONS); + goto bad; + } + } + #ifdef IPSEC - /* - * enforce IPsec policy checking if we are seeing last header. - * note that we do not visit this with protocols with pcb layer - * code - like udp/tcp/raw ip. - */ - if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 && - ipsec6_in_reject(m, NULL)) { - ipsec6stat.in_polvio++; - goto bad; + if (ipsec_used) { + /* + * Enforce IPsec policy checking if we are seeing last + * header. Note that we do not visit this with + * protocols with pcb layer code - like udp/tcp/raw ip. + */ + if ((inet6sw[ip6_protox[nxt]].pr_flags + & PR_LASTHDR) != 0) { + int error; + + error = ipsec_ip_input_checkpolicy(m, false); + if (error) { + IP6_STATINC(IP6_STAT_IPSECDROP_IN); + goto bad; + } + } } #endif nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt); } return; - bad: + +bad_unref: + rtcache_unref(rt, ro); + rtcache_percpu_putref(ip6_forward_rt_percpu); +bad: m_freem(m); + return; +} + +static bool +ip6_badaddr(struct ip6_hdr *ip6) +{ + /* Check against address spoofing/corruption. */ + if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || + IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) { + return true; + } + + /* + * The following check is not documented in specs. A malicious + * party may be able to use IPv4 mapped addr to confuse tcp/udp stack + * and bypass security checks (act as if it was from 127.0.0.1 by using + * IPv6 src ::ffff:127.0.0.1). Be cautious. + * + * This check chokes if we are in an SIIT cloud. As none of BSDs + * support IPv4-less kernel compilation, we cannot support SIIT + * environment at all. So, it makes more sense for us to reject any + * malicious packets for non-SIIT environment, than try to do a + * partial support for SIIT environment. + */ + if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || + IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { + return true; + } + + /* + * Reject packets with IPv4-compatible IPv6 addresses (RFC4291). + */ + if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || + IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { + return true; + } + + return false; } /* * set/grab in6_ifaddr correspond to IPv6 destination address. */ static struct m_tag * -ip6_setdstifaddr(m, ia6) - struct mbuf *m; - struct in6_ifaddr *ia6; +ip6_setdstifaddr(struct mbuf *m, const struct in6_ifaddr *ia) { struct m_tag *mtag; + struct ip6aux *ip6a; mtag = ip6_addaux(m); - if (mtag) - ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6; - return mtag; /* NULL if failed to set */ + if (mtag == NULL) + return NULL; + + ip6a = (struct ip6aux *)(mtag + 1); + if (in6_setscope(&ip6a->ip6a_src, ia->ia_ifp, &ip6a->ip6a_scope_id)) { + IP6_STATINC(IP6_STAT_BADSCOPE); + return NULL; + } + + ip6a->ip6a_src = ia->ia_addr.sin6_addr; + ip6a->ip6a_flags = ia->ia6_flags; + return mtag; } -struct in6_ifaddr * -ip6_getdstifaddr(m) - struct mbuf *m; +const struct ip6aux * +ip6_getdstifaddr(struct mbuf *m) { struct m_tag *mtag; mtag = ip6_findaux(m); - if (mtag) - return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6; + if (mtag != NULL) + return (struct ip6aux *)(mtag + 1); else return NULL; } @@ -794,13 +852,12 @@ ip6_getdstifaddr(m) /* * Hop-by-Hop options header processing. If a valid jumbo payload option is * included, the real payload length will be stored in plenp. + * + * rtalertp - XXX: should be stored more smart way */ -static int -ip6_hopopts_input(plenp, rtalertp, mp, offp) - u_int32_t *plenp; - u_int32_t *rtalertp; /* XXX: should be stored more smart way */ - struct mbuf **mp; - int *offp; +int +ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp, + struct mbuf **mp, int *offp) { struct mbuf *m = *mp; int off = *offp, hbhlen; @@ -808,16 +865,16 @@ ip6_hopopts_input(plenp, rtalertp, mp, o /* validation of the length of the header */ IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, - sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); + sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); if (hbh == NULL) { - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_TOOSHORT); return -1; } hbhlen = (hbh->ip6h_len + 1) << 3; IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), - hbhlen); + hbhlen); if (hbh == NULL) { - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_TOOSHORT); return -1; } KASSERT(IP6_HDR_ALIGNED_P(hbh)); @@ -825,12 +882,12 @@ ip6_hopopts_input(plenp, rtalertp, mp, o hbhlen -= sizeof(struct ip6_hbh); if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh), - hbhlen, rtalertp, plenp) < 0) - return (-1); + hbhlen, rtalertp, plenp) < 0) + return -1; *offp = off; *mp = m; - return (0); + return 0; } /* @@ -843,13 +900,9 @@ ip6_hopopts_input(plenp, rtalertp, mp, o * (RFC2460 p7), opthead is pointer into data content in m, and opthead to * opthead + hbhlen is located in continuous memory region. */ -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; +static int +ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen, + u_int32_t *rtalertp, u_int32_t *plenp) { struct ip6_hdr *ip6; int optlen = 0; @@ -865,7 +918,7 @@ ip6_process_hopopts(m, opthead, hbhlen, break; case IP6OPT_PADN: if (hbhlen < IP6OPT_MINLEN) { - ip6stat.ip6s_toosmall++; + IP6_STATINC(IP6_STAT_TOOSMALL); goto bad; } optlen = *(opt + 1) + 2; @@ -873,7 +926,7 @@ ip6_process_hopopts(m, opthead, hbhlen, case IP6OPT_RTALERT: /* XXX may need check for alignment */ if (hbhlen < IP6OPT_RTALERT_LEN) { - ip6stat.ip6s_toosmall++; + IP6_STATINC(IP6_STAT_TOOSMALL); goto bad; } if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) { @@ -884,13 +937,13 @@ ip6_process_hopopts(m, opthead, hbhlen, return (-1); } optlen = IP6OPT_RTALERT_LEN; - bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); + memcpy((void *)&rtalert_val, (void *)(opt + 2), 2); *rtalertp = ntohs(rtalert_val); break; case IP6OPT_JUMBO: /* XXX may need check for alignment */ if (hbhlen < IP6OPT_JUMBO_LEN) { - ip6stat.ip6s_toosmall++; + IP6_STATINC(IP6_STAT_TOOSMALL); goto bad; } if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) { @@ -908,7 +961,7 @@ ip6_process_hopopts(m, opthead, hbhlen, */ ip6 = mtod(m, struct ip6_hdr *); if (ip6->ip6_plen) { - ip6stat.ip6s_badoptions++; + IP6_STATINC(IP6_STAT_BADOPTIONS); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, erroff + opt - opthead); @@ -917,9 +970,9 @@ ip6_process_hopopts(m, opthead, hbhlen, /* * We may see jumbolen in unaligned location, so - * we'd need to perform bcopy(). + * we'd need to perform memcpy(). */ - bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); + memcpy(&jumboplen, opt + 2, sizeof(jumboplen)); jumboplen = (u_int32_t)htonl(jumboplen); #if 1 @@ -932,7 +985,7 @@ ip6_process_hopopts(m, opthead, hbhlen, * there's no explicit mention in specification. */ if (*plenp != 0) { - ip6stat.ip6s_badoptions++; + IP6_STATINC(IP6_STAT_BADOPTIONS); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, erroff + opt + 2 - opthead); @@ -944,7 +997,7 @@ ip6_process_hopopts(m, opthead, hbhlen, * jumbo payload length must be larger than 65535. */ if (jumboplen <= IPV6_MAXPACKET) { - ip6stat.ip6s_badoptions++; + IP6_STATINC(IP6_STAT_BADOPTIONS); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER, erroff + opt + 2 - opthead); @@ -955,7 +1008,7 @@ ip6_process_hopopts(m, opthead, hbhlen, break; default: /* unknown option */ if (hbhlen < IP6OPT_MINLEN) { - ip6stat.ip6s_toosmall++; + IP6_STATINC(IP6_STAT_TOOSMALL); goto bad; } optlen = ip6_unknown_opt(opt, m, @@ -981,10 +1034,7 @@ ip6_process_hopopts(m, opthead, hbhlen, * is not continuous in order to return an ICMPv6 error. */ int -ip6_unknown_opt(optp, m, off) - u_int8_t *optp; - struct mbuf *m; - int off; +ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off) { struct ip6_hdr *ip6; @@ -995,11 +1045,11 @@ ip6_unknown_opt(optp, m, off) m_freem(m); return (-1); case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */ - ip6stat.ip6s_badoptions++; + IP6_STATINC(IP6_STAT_BADOPTIONS); icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off); return (-1); case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */ - ip6stat.ip6s_badoptions++; + IP6_STATINC(IP6_STAT_BADOPTIONS); ip6 = mtod(m, struct ip6_hdr *); if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || (m->m_flags & (M_BCAST|M_MCAST))) @@ -1014,41 +1064,21 @@ ip6_unknown_opt(optp, m, off) return (-1); } -/* - * Create the "control" list for this pcb. - * - * The routine will be called from upper layer handlers like tcp6_input(). - * Thus the routine assumes that the caller (tcp6_input) have already - * called IP6_EXTHDR_CHECK() and all the extension headers are located in the - * very first mbuf on the mbuf chain. - * We may want to add some infinite loop prevention or sanity checks for safety. - * (This applies only when you are using KAME mbuf chain restriction, i.e. - * you are using IP6_EXTHDR_CHECK() not m_pulldown()) - */ void -ip6_savecontrol(in6p, mp, ip6, m) - struct in6pcb *in6p; - struct mbuf **mp; - struct ip6_hdr *ip6; - struct mbuf *m; +ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp, + struct ip6_hdr *ip6, struct mbuf *m) { + struct socket *so = in6p->in6p_socket; #ifdef RFC2292 #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y)) #else #define IS2292(x, y) (y) #endif -#ifdef 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) - mp = &(*mp)->m_next; - } -#endif + KASSERT(m->m_flags & M_PKTHDR); + + if (SOOPT_TIMESTAMP(so->so_options)) + mp = sbsavetimestamp(so->so_options, mp); /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */ if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) @@ -1058,12 +1088,10 @@ ip6_savecontrol(in6p, mp, ip6, m) if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) { struct in6_pktinfo pi6; - bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr)); + memcpy(&pi6.ipi6_addr, &ip6->ip6_dst, sizeof(struct in6_addr)); in6_clearscope(&pi6.ipi6_addr); /* XXX */ - pi6.ipi6_ifindex = m->m_pkthdr.rcvif ? - m->m_pkthdr.rcvif->if_index : 0; - *mp = sbcreatecontrol((caddr_t) &pi6, - sizeof(struct in6_pktinfo), + pi6.ipi6_ifindex = m->m_pkthdr.rcvif_index; + *mp = sbcreatecontrol(&pi6, sizeof(pi6), IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6); if (*mp) mp = &(*mp)->m_next; @@ -1072,7 +1100,7 @@ ip6_savecontrol(in6p, mp, ip6, m) if (in6p->in6p_flags & IN6P_HOPLIMIT) { int hlim = ip6->ip6_hlim & 0xff; - *mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int), + *mp = sbcreatecontrol(&hlim, sizeof(hlim), IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6); if (*mp) mp = &(*mp)->m_next; @@ -1086,7 +1114,7 @@ ip6_savecontrol(in6p, mp, ip6, m) flowinfo >>= 20; tclass = flowinfo & 0xff; - *mp = sbcreatecontrol((caddr_t)&tclass, sizeof(tclass), + *mp = sbcreatecontrol(&tclass, sizeof(tclass), IPV6_TCLASS, IPPROTO_IPV6); if (*mp) @@ -1117,14 +1145,14 @@ ip6_savecontrol(in6p, mp, ip6, m) ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr), xip6->ip6_nxt); if (ext == NULL) { - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_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++; + IP6_STATINC(IP6_STAT_TOOSHORT); return; } @@ -1134,7 +1162,7 @@ ip6_savecontrol(in6p, mp, ip6, m) * be removed before returning in the RFC 2292. * Note: this constraint is removed in RFC3542. */ - *mp = sbcreatecontrol((caddr_t)hbh, hbhlen, + *mp = sbcreatecontrol(hbh, hbhlen, IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS), IPPROTO_IPV6); if (*mp) @@ -1176,7 +1204,7 @@ ip6_savecontrol(in6p, mp, ip6, m) ext = ip6_pullexthdr(m, off, nxt); if (ext == NULL) { - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_TOOSHORT); return; } ip6e = mtod(ext, struct ip6_ext *); @@ -1186,17 +1214,17 @@ ip6_savecontrol(in6p, mp, ip6, m) elen = (ip6e->ip6e_len + 1) << 3; if (elen != ext->m_len) { m_freem(ext); - ip6stat.ip6s_tooshort++; + IP6_STATINC(IP6_STAT_TOOSHORT); return; } KASSERT(IP6_HDR_ALIGNED_P(ip6e)); switch (nxt) { case IPPROTO_DSTOPTS: - if (!in6p->in6p_flags & IN6P_DSTOPTS) + if (!(in6p->in6p_flags & IN6P_DSTOPTS)) break; - *mp = sbcreatecontrol((caddr_t)ip6e, elen, + *mp = sbcreatecontrol(ip6e, elen, IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS), IPPROTO_IPV6); if (*mp) @@ -1204,10 +1232,10 @@ ip6_savecontrol(in6p, mp, ip6, m) break; case IPPROTO_ROUTING: - if (!in6p->in6p_flags & IN6P_RTHDR) + if (!(in6p->in6p_flags & IN6P_RTHDR)) break; - *mp = sbcreatecontrol((caddr_t)ip6e, elen, + *mp = sbcreatecontrol(ip6e, elen, IS2292(IPV6_2292RTHDR, IPV6_RTHDR), IPPROTO_IPV6); if (*mp) @@ -1245,7 +1273,8 @@ ip6_savecontrol(in6p, mp, ip6, m) void -ip6_notify_pmtu(struct in6pcb *in6p, struct sockaddr_in6 *dst, uint32_t *mtu) +ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst, + uint32_t *mtu) { struct socket *so; struct mbuf *m_mtu; @@ -1256,10 +1285,7 @@ ip6_notify_pmtu(struct in6pcb *in6p, str if (mtu == NULL) return; -#ifdef DIAGNOSTIC - if (so == NULL) /* I believe this is impossible */ - panic("ip6_notify_pmtu: socket is NULL"); -#endif + KASSERT(so != NULL); memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */ mtuctl.ip6m_mtu = *mtu; @@ -1267,14 +1293,14 @@ ip6_notify_pmtu(struct in6pcb *in6p, str if (sa6_recoverscope(&mtuctl.ip6m_addr)) return; - if ((m_mtu = sbcreatecontrol((caddr_t)&mtuctl, sizeof(mtuctl), + if ((m_mtu = sbcreatecontrol(&mtuctl, sizeof(mtuctl), IPV6_PATHMTU, IPPROTO_IPV6)) == NULL) return; - if (sbappendaddr(&so->so_rcv, (struct sockaddr *)dst, NULL, m_mtu) + if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu) == 0) { + soroverflow(so); m_freem(m_mtu); - /* XXX: should count statistics */ } else sorwakeup(so); @@ -1286,33 +1312,24 @@ ip6_notify_pmtu(struct in6pcb *in6p, str * contains the result, or NULL on error. */ static struct mbuf * -ip6_pullexthdr(m, off, nxt) - struct mbuf *m; - size_t off; - int nxt; +ip6_pullexthdr(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: /* is it possible? */ - break; - default: - printf("ip6_pullexthdr: invalid nxt=%d\n", nxt); - } -#endif + if (off + sizeof(ip6e) > m->m_pkthdr.len) + return NULL; - m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e); + m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); if (nxt == IPPROTO_AH) elen = (ip6e.ip6e_len + 2) << 2; else elen = (ip6e.ip6e_len + 1) << 3; + if (off + elen > m->m_pkthdr.len) + return NULL; + MGET(n, M_DONTWAIT, MT_DATA); if (n && elen >= MLEN) { MCLGET(n, M_DONTWAIT); @@ -1330,58 +1347,50 @@ ip6_pullexthdr(m, off, nxt) return NULL; } - m_copydata(m, off, elen, mtod(n, caddr_t)); + m_copydata(m, off, elen, mtod(n, void *)); n->m_len = elen; return n; } /* - * Get pointer to the previous header followed by the header + * Get offset to the previous header followed by the header * currently processed. - * XXX: This function supposes that - * M includes all headers, - * the next header field and the header length field of each header - * are valid, and - * the sum of each header length equals to OFF. - * Because of these assumptions, this function must be called very - * carefully. Moreover, it will not be used in the near future when - * we develop `neater' mechanism to process extension headers. */ -u_int8_t * -ip6_get_prevhdr(m, off) - struct mbuf *m; - int off; +int +ip6_get_prevhdr(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; + if (off == sizeof(struct ip6_hdr)) { + return offsetof(struct ip6_hdr, ip6_nxt); + } else if (off < sizeof(struct ip6_hdr)) { + panic("%s: off < sizeof(struct ip6_hdr)", __func__); + } else { + int len, nlen, nxt; + struct ip6_ext ip6e; nxt = ip6->ip6_nxt; len = sizeof(struct ip6_hdr); + nlen = 0; while (len < off) { - ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len); + m_copydata(m, len, sizeof(ip6e), &ip6e); switch (nxt) { case IPPROTO_FRAGMENT: - len += sizeof(struct ip6_frag); + nlen = sizeof(struct ip6_frag); break; case IPPROTO_AH: - len += (ip6e->ip6e_len + 2) << 2; + nlen = (ip6e.ip6e_len + 2) << 2; break; default: - len += (ip6e->ip6e_len + 1) << 3; + nlen = (ip6e.ip6e_len + 1) << 3; break; } - nxt = ip6e->ip6e_nxt; + len += nlen; + nxt = ip6e.ip6e_nxt; } - if (ip6e) - return (&ip6e->ip6e_nxt); - else - return NULL; + + return (len - nlen); } } @@ -1389,11 +1398,7 @@ ip6_get_prevhdr(m, off) * get next header offset. m will be retained. */ int -ip6_nexthdr(m, off, proto, nxtp) - struct mbuf *m; - int off; - int proto; - int *nxtp; +ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp) { struct ip6_hdr ip6; struct ip6_ext ip6e; @@ -1401,7 +1406,7 @@ ip6_nexthdr(m, off, proto, nxtp) /* just in case */ if (m == NULL) - panic("ip6_nexthdr: m == NULL"); + panic("%s: m == NULL", __func__); if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off) return -1; @@ -1412,7 +1417,7 @@ ip6_nexthdr(m, off, proto, nxtp) return -1; if (m->m_pkthdr.len < off + sizeof(ip6)) return -1; - m_copydata(m, off, sizeof(ip6), (caddr_t)&ip6); + m_copydata(m, off, sizeof(ip6), (void *)&ip6); if (nxtp) *nxtp = ip6.ip6_nxt; off += sizeof(ip6); @@ -1425,7 +1430,7 @@ ip6_nexthdr(m, off, proto, nxtp) */ if (m->m_pkthdr.len < off + sizeof(fh)) return -1; - m_copydata(m, off, sizeof(fh), (caddr_t)&fh); + m_copydata(m, off, sizeof(fh), (void *)&fh); if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0) return -1; if (nxtp) @@ -1436,7 +1441,7 @@ ip6_nexthdr(m, off, proto, nxtp) case IPPROTO_AH: if (m->m_pkthdr.len < off + sizeof(ip6e)) return -1; - m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e); + m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); if (nxtp) *nxtp = ip6e.ip6e_nxt; off += (ip6e.ip6e_len + 2) << 2; @@ -1449,7 +1454,7 @@ ip6_nexthdr(m, off, proto, nxtp) case IPPROTO_DSTOPTS: if (m->m_pkthdr.len < off + sizeof(ip6e)) return -1; - m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e); + m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); if (nxtp) *nxtp = ip6e.ip6e_nxt; off += (ip6e.ip6e_len + 1) << 3; @@ -1472,11 +1477,7 @@ ip6_nexthdr(m, off, proto, nxtp) * get offset for the last header in the chain. m will be kept untainted. */ int -ip6_lasthdr(m, off, proto, nxtp) - struct mbuf *m; - int off; - int proto; - int *nxtp; +ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp) { int newoff; int nxt; @@ -1499,41 +1500,38 @@ ip6_lasthdr(m, off, proto, nxtp) } } -struct m_tag * -ip6_addaux(m) - struct mbuf *m; +static struct m_tag * +ip6_addaux(struct mbuf *m) { struct m_tag *mtag; - mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); + mtag = m_tag_find(m, PACKET_TAG_INET6); if (!mtag) { mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux), M_NOWAIT); if (mtag) { m_tag_prepend(m, mtag); - bzero(mtag + 1, sizeof(struct ip6aux)); + memset(mtag + 1, 0, sizeof(struct ip6aux)); } } return mtag; } -struct m_tag * -ip6_findaux(m) - struct mbuf *m; +static struct m_tag * +ip6_findaux(struct mbuf *m) { struct m_tag *mtag; - mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); + mtag = m_tag_find(m, PACKET_TAG_INET6); return mtag; } -void -ip6_delaux(m) - struct mbuf *m; +static void +ip6_delaux(struct mbuf *m) { struct m_tag *mtag; - mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); + mtag = m_tag_find(m, PACKET_TAG_INET6); if (mtag) m_tag_delete(m, mtag); } @@ -1542,7 +1540,7 @@ ip6_delaux(m) * System control for IP6 */ -u_char inet6ctlerrmap[PRC_NCMDS] = { +const u_char inet6ctlerrmap[PRC_NCMDS] = { 0, 0, 0, 0, 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH, EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED, @@ -1551,19 +1549,19 @@ u_char inet6ctlerrmap[PRC_NCMDS] = { ENOPROTOOPT }; -SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup") +extern int sysctl_net_inet6_addrctlpolicy(SYSCTLFN_ARGS); + +static int +sysctl_net_inet6_ip6_stats(SYSCTLFN_ARGS) +{ + + return (NETSTAT_SYSCTL(ip6stat_percpu, IP6_NSTATS)); +} + +static void +sysctl_net_inet6_ip6_setup(struct sysctllog **clog) { -#ifdef RFC2292 -#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y)) -#else -#define IS2292(x, y) (y) -#endif - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT, - CTLTYPE_NODE, "net", NULL, - NULL, 0, NULL, 0, - CTL_NET, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "inet6", @@ -1598,34 +1596,6 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, NULL, 0, &ip6_defhlim, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM, CTL_EOL); -#ifdef notyet - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "mtu", NULL, - NULL, 0, &, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_DEFMTU, CTL_EOL); -#endif -#ifdef __no_idea__ - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "forwsrcrt", NULL, - NULL, 0, &?, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_FORWSRCRT, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_STRUCT, "mrtstats", NULL, - NULL, 0, &?, sizeof(?), - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_MRTSTATS, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_?, "mrtproto", NULL, - NULL, 0, &?, sizeof(?), - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_MRTPROTO, CTL_EOL); -#endif sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "maxfragpackets", @@ -1634,27 +1604,6 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, NULL, 0, &ip6_maxfragpackets, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_MAXFRAGPACKETS, CTL_EOL); -#ifdef __no_idea__ - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "sourcecheck", NULL, - NULL, 0, &?, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_SOURCECHECK, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "sourcecheck_logint", NULL, - NULL, 0, &?, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL); -#endif - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "accept_rtadv", - SYSCTL_DESCR("Accept router advertisements"), - NULL, 0, &ip6_accept_rtadv, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_ACCEPT_RTADV, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "keepfaith", @@ -1665,7 +1614,7 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "log_interval", - SYSCTL_DESCR("Minumum interval between logging " + SYSCTL_DESCR("Minimum interval between logging " "unroutable packets"), NULL, 0, &ip6_log_interval, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, @@ -1699,15 +1648,6 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, NULL, 0, &ip6_defmcasthlim, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFMCASTHLIM, CTL_EOL); -#if NGIF > 0 - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "gifhlim", - SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"), - NULL, 0, &ip6_gif_hlim, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_GIF_HLIM, CTL_EOL); -#endif /* NGIF */ sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "kame_version", @@ -1724,12 +1664,6 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_USE_DEPRECATED, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "rr_prune", NULL, - NULL, 0, &ip6_rr_prune, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - IPV6CTL_RR_PRUNE, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT #ifndef INET6_BINDV6ONLY |CTLFLAG_READWRITE, @@ -1774,23 +1708,27 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, #endif /* IPNOPRIVPORTS */ sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "use_tempaddr", - SYSCTL_DESCR("Use temporary address"), - NULL, 0, &ip6_use_tempaddr, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - CTL_CREATE, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "temppltime", - SYSCTL_DESCR("preferred lifetime of a temporary address"), - NULL, 0, &ip6_temp_preferred_lifetime, 0, - CTL_NET, PF_INET6, IPPROTO_IPV6, - CTL_CREATE, CTL_EOL); - sysctl_createv(clog, 0, NULL, NULL, - CTLFLAG_PERMANENT|CTLFLAG_READWRITE, - CTLTYPE_INT, "tempvltime", - SYSCTL_DESCR("valid lifetime of a temporary address"), - NULL, 0, &ip6_temp_valid_lifetime, 0, + CTLTYPE_INT, "auto_linklocal", + SYSCTL_DESCR("Default value of per-interface flag for " + "adding an IPv6 link-local address to " + "interfaces when attached"), + NULL, 0, &ip6_auto_linklocal, 0, + CTL_NET, PF_INET6, IPPROTO_IPV6, + IPV6CTL_AUTO_LINKLOCAL, CTL_EOL); + sysctl_createv(clog, 0, NULL, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READONLY, + CTLTYPE_STRUCT, "addctlpolicy", + SYSCTL_DESCR("Return the current address control" + " policy"), + sysctl_net_inet6_addrctlpolicy, 0, NULL, 0, + CTL_NET, PF_INET6, IPPROTO_IPV6, + IPV6CTL_ADDRCTLPOLICY, CTL_EOL); + sysctl_createv(clog, 0, NULL, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READWRITE, + CTLTYPE_INT, "prefer_tempaddr", + SYSCTL_DESCR("Prefer temporary address as source " + "address"), + NULL, 0, &ip6_prefer_tempaddr, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, @@ -1804,7 +1742,7 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "stats", SYSCTL_DESCR("IPv6 statistics"), - NULL, 0, &ip6stat, sizeof(ip6stat), + sysctl_net_inet6_ip6_stats, 0, NULL, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_STATS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, @@ -1821,4 +1759,54 @@ SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, NULL, 0, &ip6_mcast_pmtu, 0, CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL); + /* anonportalgo RFC6056 subtree */ + const struct sysctlnode *portalgo_node; + sysctl_createv(clog, 0, NULL, &portalgo_node, + CTLFLAG_PERMANENT, + CTLTYPE_NODE, "anonportalgo", + SYSCTL_DESCR("Anonymous port algorithm selection (RFC 6056)"), + NULL, 0, NULL, 0, + CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_CREATE, CTL_EOL); + sysctl_createv(clog, 0, &portalgo_node, NULL, + CTLFLAG_PERMANENT, + CTLTYPE_STRING, "available", + SYSCTL_DESCR("available algorithms"), + sysctl_portalgo_available, 0, NULL, PORTALGO_MAXLEN, + CTL_CREATE, CTL_EOL); + sysctl_createv(clog, 0, &portalgo_node, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READWRITE, + CTLTYPE_STRING, "selected", + SYSCTL_DESCR("selected algorithm"), + sysctl_portalgo_selected6, 0, NULL, PORTALGO_MAXLEN, + CTL_CREATE, CTL_EOL); + sysctl_createv(clog, 0, &portalgo_node, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READWRITE, + CTLTYPE_STRUCT, "reserve", + SYSCTL_DESCR("bitmap of reserved ports"), + sysctl_portalgo_reserve6, 0, NULL, 0, + CTL_CREATE, CTL_EOL); + sysctl_createv(clog, 0, NULL, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READWRITE, + CTLTYPE_INT, "neighborgcthresh", + SYSCTL_DESCR("Maximum number of entries in neighbor" + " cache"), + NULL, 1, &ip6_neighborgcthresh, 0, + CTL_NET, PF_INET6, IPPROTO_IPV6, + CTL_CREATE, CTL_EOL); + sysctl_createv(clog, 0, NULL, NULL, + CTLFLAG_PERMANENT|CTLFLAG_READWRITE, + CTLTYPE_INT, "maxdynroutes", + SYSCTL_DESCR("Maximum number of routes created via" + " redirect"), + NULL, 1, &ip6_maxdynroutes, 0, + CTL_NET, PF_INET6, IPPROTO_IPV6, + CTL_CREATE, CTL_EOL); +} + +void +ip6_statinc(u_int stat) +{ + + KASSERT(stat < IP6_NSTATS); + IP6_STATINC(stat); }