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Differential D24141 Diff 69744 sys/netinet6/ip6_output.c

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sys/netinet6/ip6_output.c

Show First 20 Lines • Show All 89 Lines • ▼ Show 20 Lines
#include <machine/in_cksum.h> #include <machine/in_cksum.h>
#include <net/if.h> #include <net/if.h>
#include <net/if_var.h> #include <net/if_var.h>
#include <net/if_llatbl.h> #include <net/if_llatbl.h>
#include <net/netisr.h> #include <net/netisr.h>
#include <net/route.h> #include <net/route.h>
#include <net/route/nhop.h>
#include <net/pfil.h> #include <net/pfil.h>
#include <net/rss_config.h> #include <net/rss_config.h>
#include <net/vnet.h> #include <net/vnet.h>
#include <netinet/in.h> #include <netinet/in.h>
#include <netinet/in_var.h> #include <netinet/in_var.h>
#include <netinet/ip_var.h> #include <netinet/ip_var.h>
#include <netinet6/in6_fib.h> #include <netinet6/in6_fib.h>
▲ Show 20 Lines • Show All 292 Lines • ▼ Show 20 Lines
/* /*
* IP6 output. * IP6 output.
* The packet in mbuf chain m contains a skeletal IP6 header (with pri, len, * The packet in mbuf chain m contains a skeletal IP6 header (with pri, len,
* nxt, hlim, src, dst). * nxt, hlim, src, dst).
* This function may modify ver and hlim only. * This function may modify ver and hlim only.
* The mbuf chain containing the packet will be freed. * The mbuf chain containing the packet will be freed.
* The mbuf opt, if present, will not be freed. * The mbuf opt, if present, will not be freed.
* If route_in6 ro is present and has ro_rt initialized, route lookup would be * If route_in6 ro is present and has ro_nh initialized, route lookup would be
* skipped and ro->ro_rt would be used. If ro is present but ro->ro_rt is NULL, * skipped and ro->ro_nh would be used. If ro is present but ro->ro_nh is NULL,
* then result of route lookup is stored in ro->ro_rt. * then result of route lookup is stored in ro->ro_nh.
* *
* Type of "mtu": rt_mtu is u_long, ifnet.ifr_mtu is int, and nd_ifinfo.linkmtu * Type of "mtu": rt_mtu is u_long, ifnet.ifr_mtu is int, and nd_ifinfo.linkmtu
* is uint32_t. So we use u_long to hold largest one, which is rt_mtu. * is uint32_t. So we use u_long to hold largest one, which is rt_mtu.
* *
* ifpp - XXX: just for statistics * ifpp - XXX: just for statistics
*/ */
/*
* XXX TODO: no flowid is assigned for outbound flows?
*/
int int
ip6_output(struct mbuf *m0, struct ip6_pktopts *opt, ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
struct route_in6 *ro, int flags, struct ip6_moptions *im6o, struct route_in6 *ro, int flags, struct ip6_moptions *im6o,
struct ifnet **ifpp, struct inpcb *inp) struct ifnet **ifpp, struct inpcb *inp)
{ {
struct ip6_hdr *ip6; struct ip6_hdr *ip6;
struct ifnet *ifp, *origifp; struct ifnet *ifp, *origifp;
struct mbuf *m = m0; struct mbuf *m = m0;
struct mbuf *mprev; struct mbuf *mprev;
struct route_in6 *ro_pmtu; struct route_in6 *ro_pmtu;
struct rtentry *rt; struct nhop_object *nh;
struct sockaddr_in6 *dst, sin6, src_sa, dst_sa; struct sockaddr_in6 *dst, sin6, src_sa, dst_sa;
struct in6_addr odst; struct in6_addr odst;
u_char *nexthdrp; u_char *nexthdrp;
int tlen, len; int tlen, len;
int error = 0; int error = 0;
struct in6_ifaddr *ia = NULL; struct in6_ifaddr *ia = NULL;
u_long mtu; u_long mtu;
int alwaysfrag, dontfrag; int alwaysfrag, dontfrag;
▲ Show 20 Lines • Show All 224 Lines • ▼ Show 20 Lines if (opt && opt->ip6po_hlim != -1)
ip6->ip6_hlim = opt->ip6po_hlim & 0xff; ip6->ip6_hlim = opt->ip6po_hlim & 0xff;
else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
if (im6o != NULL) if (im6o != NULL)
ip6->ip6_hlim = im6o->im6o_multicast_hlim; ip6->ip6_hlim = im6o->im6o_multicast_hlim;
else else
ip6->ip6_hlim = V_ip6_defmcasthlim; ip6->ip6_hlim = V_ip6_defmcasthlim;
} }
if (ro == NULL || ro->ro_rt == NULL) { if (ro == NULL || ro->ro_nh == NULL) {
bzero(dst, sizeof(*dst)); bzero(dst, sizeof(*dst));
dst->sin6_family = AF_INET6; dst->sin6_family = AF_INET6;
dst->sin6_len = sizeof(*dst); dst->sin6_len = sizeof(*dst);
dst->sin6_addr = ip6->ip6_dst; dst->sin6_addr = ip6->ip6_dst;
} }
/* /*
* Validate route against routing table changes. * Validate route against routing table changes.
* Make sure that the address family is set in route. * Make sure that the address family is set in route.
*/ */
rt = NULL; nh = NULL;
ifp = NULL; ifp = NULL;
mtu = 0; mtu = 0;
if (ro != NULL) { if (ro != NULL) {
if (ro->ro_rt != NULL && inp != NULL) { if (ro->ro_nh != NULL && inp != NULL) {
ro->ro_dst.sin6_family = AF_INET6; /* XXX KASSERT? */ ro->ro_dst.sin6_family = AF_INET6; /* XXX KASSERT? */
RT_VALIDATE((struct route *)ro, &inp->inp_rt_cookie, NH_VALIDATE((struct route *)ro, &inp->inp_rt_cookie,
fibnum); fibnum);
} }
if (ro->ro_rt != NULL && fwd_tag == NULL && if (ro->ro_nh != NULL && fwd_tag == NULL &&
((ro->ro_rt->rt_flags & RTF_UP) == 0 || (!NH_IS_VALID(ro->ro_nh) ||
ro->ro_rt->rt_ifp == NULL ||
!RT_LINK_IS_UP(ro->ro_rt->rt_ifp) ||
ro->ro_dst.sin6_family != AF_INET6 || ro->ro_dst.sin6_family != AF_INET6 ||
!IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst))) !IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst)))
RO_INVALIDATE_CACHE(ro); RO_INVALIDATE_CACHE(ro);
if (ro->ro_rt != NULL && fwd_tag == NULL && if (ro->ro_nh != NULL && fwd_tag == NULL &&
(ro->ro_rt->rt_flags & RTF_UP) &&
ro->ro_dst.sin6_family == AF_INET6 && ro->ro_dst.sin6_family == AF_INET6 &&
IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst)) { IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst)) {
rt = ro->ro_rt; nh = ro->ro_nh;
ifp = ro->ro_rt->rt_ifp; ifp = nh->nh_ifp;
} else { } else {
if (ro->ro_lle) if (ro->ro_lle)
LLE_FREE(ro->ro_lle); /* zeros ro_lle */ LLE_FREE(ro->ro_lle); /* zeros ro_lle */
ro->ro_lle = NULL; ro->ro_lle = NULL;
if (fwd_tag == NULL) { if (fwd_tag == NULL) {
bzero(&dst_sa, sizeof(dst_sa)); bzero(&dst_sa, sizeof(dst_sa));
dst_sa.sin6_family = AF_INET6; dst_sa.sin6_family = AF_INET6;
dst_sa.sin6_len = sizeof(dst_sa); dst_sa.sin6_len = sizeof(dst_sa);
dst_sa.sin6_addr = ip6->ip6_dst; dst_sa.sin6_addr = ip6->ip6_dst;
} }
error = in6_selectroute(&dst_sa, opt, im6o, ro, &ifp, error = in6_selectroute(&dst_sa, opt, im6o, ro, &ifp,
&rt, fibnum); &nh, fibnum, m->m_pkthdr.flowid);
if (error != 0) { if (error != 0) {
IP6STAT_INC(ip6s_noroute); IP6STAT_INC(ip6s_noroute);
if (ifp != NULL) if (ifp != NULL)
in6_ifstat_inc(ifp, ifs6_out_discard); in6_ifstat_inc(ifp, ifs6_out_discard);
goto bad; goto bad;
} }
if (ifp != NULL) if (ifp != NULL)
mtu = ifp->if_mtu; mtu = ifp->if_mtu;
} }
if (rt == NULL) { if (nh == NULL) {
/* /*
* If in6_selectroute() does not return a route entry * If in6_selectroute() does not return nexthop
* dst may not have been updated. * dst may not have been updated.
*/ */
*dst = dst_sa; /* XXX */ *dst = dst_sa; /* XXX */
} else { } else {
if (rt->rt_flags & RTF_HOST) if (nh->nh_flags & NHF_HOST)
mtu = rt->rt_mtu; mtu = nh->nh_mtu;
ia = (struct in6_ifaddr *)(rt->rt_ifa); ia = (struct in6_ifaddr *)(nh->nh_ifa);
counter_u64_add(rt->rt_pksent, 1); counter_u64_add(nh->nh_pksent, 1);
} }
} else { } else {
struct nhop6_extended nh6; struct nhop6_extended nh6;
struct in6_addr kdst; struct in6_addr kdst;
uint32_t scopeid; uint32_t scopeid;
if (fwd_tag == NULL) { if (fwd_tag == NULL) {
bzero(&dst_sa, sizeof(dst_sa)); bzero(&dst_sa, sizeof(dst_sa));
Show All 16 Lines if (IN6_IS_ADDR_MC_LINKLOCAL(&dst_sa.sin6_addr) ||
IN6_IS_ADDR_MC_NODELOCAL(&dst_sa.sin6_addr)) { IN6_IS_ADDR_MC_NODELOCAL(&dst_sa.sin6_addr)) {
if (scopeid > 0) { if (scopeid > 0) {
ifp = in6_getlinkifnet(scopeid); ifp = in6_getlinkifnet(scopeid);
*dst = dst_sa; /* XXX */ *dst = dst_sa; /* XXX */
goto nonh6lookup; goto nonh6lookup;
} }
} }
error = fib6_lookup_nh_ext(fibnum, &kdst, scopeid, NHR_REF, 0, error = fib6_lookup_nh_ext(fibnum, &kdst, scopeid, NHR_REF,
&nh6); m->m_pkthdr.flowid, &nh6);
if (error != 0) { if (error != 0) {
IP6STAT_INC(ip6s_noroute); IP6STAT_INC(ip6s_noroute);
/* No ifp in6_ifstat_inc(ifp, ifs6_out_discard); */ /* No ifp in6_ifstat_inc(ifp, ifs6_out_discard); */
error = EHOSTUNREACH;; error = EHOSTUNREACH;;
goto bad; goto bad;
} }
ifp = nh6.nh_ifp; ifp = nh6.nh_ifp;
mtu = nh6.nh_mtu; mtu = nh6.nh_mtu;
dst->sin6_addr = nh6.nh_addr; dst->sin6_addr = nh6.nh_addr;
ia = nh6.nh_ia; ia = nh6.nh_ia;
fib6_free_nh_ext(fibnum, &nh6); fib6_free_nh_ext(fibnum, &nh6);
nonh6lookup: nonh6lookup:
; ;
} }
/* Then rt (for unicast) and ifp must be non-NULL valid values. */ /* Then nh (for unicast) and ifp must be non-NULL valid values. */
if ((flags & IPV6_FORWARDING) == 0) { if ((flags & IPV6_FORWARDING) == 0) {
/* XXX: the FORWARDING flag can be set for mrouting. */ /* XXX: the FORWARDING flag can be set for mrouting. */
in6_ifstat_inc(ifp, ifs6_out_request); in6_ifstat_inc(ifp, ifs6_out_request);
} }
/* Setup data structures for scope ID checks. */ /* Setup data structures for scope ID checks. */
src0 = ip6->ip6_src; src0 = ip6->ip6_src;
bzero(&src_sa, sizeof(src_sa)); bzero(&src_sa, sizeof(src_sa));
▲ Show 20 Lines • Show All 54 Lines • ▼ Show 20 Lines if (in6_setscope(&src0, ifp, &zone) == 0 &&
IP6STAT_INC(ip6s_badscope); IP6STAT_INC(ip6s_badscope);
in6_ifstat_inc(ifp, ifs6_out_discard); in6_ifstat_inc(ifp, ifs6_out_discard);
if (error == 0) if (error == 0)
error = EHOSTUNREACH; /* XXX */ error = EHOSTUNREACH; /* XXX */
goto bad; goto bad;
} }
/* All scope ID checks are successful. */ /* All scope ID checks are successful. */
if (rt && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { if (nh && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
if (opt && opt->ip6po_nextroute.ro_rt) { if (opt && opt->ip6po_nextroute.ro_nh) {
/* /*
* The nexthop is explicitly specified by the * The nexthop is explicitly specified by the
* application. We assume the next hop is an IPv6 * application. We assume the next hop is an IPv6
* address. * address.
*/ */
dst = (struct sockaddr_in6 *)opt->ip6po_nexthop; dst = (struct sockaddr_in6 *)opt->ip6po_nexthop;
} }
else if ((rt->rt_flags & RTF_GATEWAY)) else if ((nh->nh_flags & NHF_GATEWAY))
dst = (struct sockaddr_in6 *)rt->rt_gateway; dst = &nh->gw6_sa;
} }
if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
m->m_flags &= ~(M_BCAST | M_MCAST); /* Just in case. */ m->m_flags &= ~(M_BCAST | M_MCAST); /* Just in case. */
} else { } else {
m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST; m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST;
in6_ifstat_inc(ifp, ifs6_out_mcast); in6_ifstat_inc(ifp, ifs6_out_mcast);
▲ Show 20 Lines • Show All 638 Lines • ▼ Show 20 Lines if (ro_pmtu == NULL || ro_pmtu->ro_mtu == 0) {
mtu = nh6.nh_mtu; mtu = nh6.nh_mtu;
if (ro_pmtu != NULL) if (ro_pmtu != NULL)
ro_pmtu->ro_mtu = mtu; ro_pmtu->ro_mtu = mtu;
} }
} else } else
mtu = ro_pmtu->ro_mtu; mtu = ro_pmtu->ro_mtu;
} }
if (ro_pmtu != NULL && ro_pmtu->ro_rt != NULL) if (ro_pmtu != NULL && ro_pmtu->ro_nh != NULL)
mtu = ro_pmtu->ro_rt->rt_mtu; mtu = ro_pmtu->ro_nh->nh_mtu;
return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp, proto)); return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp, proto));
} }
/* /*
* Calculate MTU based on transmit @ifp, route mtu @rt_mtu and * Calculate MTU based on transmit @ifp, route mtu @rt_mtu and
* hostcache data for @dst. * hostcache data for @dst.
* Stores mtu and always-frag value into @mtup and @alwaysfragp. * Stores mtu and always-frag value into @mtup and @alwaysfragp.
▲ Show 20 Lines • Show All 1,111 Lines • ▼ Show 20 Lines if (pktopt->ip6po_pktinfo)
free(pktopt->ip6po_pktinfo, M_IP6OPT); free(pktopt->ip6po_pktinfo, M_IP6OPT);
pktopt->ip6po_pktinfo = NULL; pktopt->ip6po_pktinfo = NULL;
} }
if (optname == -1 || optname == IPV6_HOPLIMIT) if (optname == -1 || optname == IPV6_HOPLIMIT)
pktopt->ip6po_hlim = -1; pktopt->ip6po_hlim = -1;
if (optname == -1 || optname == IPV6_TCLASS) if (optname == -1 || optname == IPV6_TCLASS)
pktopt->ip6po_tclass = -1; pktopt->ip6po_tclass = -1;
if (optname == -1 || optname == IPV6_NEXTHOP) { if (optname == -1 || optname == IPV6_NEXTHOP) {
if (pktopt->ip6po_nextroute.ro_rt) { if (pktopt->ip6po_nextroute.ro_nh) {
RTFREE(pktopt->ip6po_nextroute.ro_rt); NH_FREE(pktopt->ip6po_nextroute.ro_nh);
pktopt->ip6po_nextroute.ro_rt = NULL; pktopt->ip6po_nextroute.ro_nh = NULL;
} }
if (pktopt->ip6po_nexthop) if (pktopt->ip6po_nexthop)
free(pktopt->ip6po_nexthop, M_IP6OPT); free(pktopt->ip6po_nexthop, M_IP6OPT);
pktopt->ip6po_nexthop = NULL; pktopt->ip6po_nexthop = NULL;
} }
if (optname == -1 || optname == IPV6_HOPOPTS) { if (optname == -1 || optname == IPV6_HOPOPTS) {
if (pktopt->ip6po_hbh) if (pktopt->ip6po_hbh)
free(pktopt->ip6po_hbh, M_IP6OPT); free(pktopt->ip6po_hbh, M_IP6OPT);
pktopt->ip6po_hbh = NULL; pktopt->ip6po_hbh = NULL;
} }
if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) { if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) {
if (pktopt->ip6po_dest1) if (pktopt->ip6po_dest1)
free(pktopt->ip6po_dest1, M_IP6OPT); free(pktopt->ip6po_dest1, M_IP6OPT);
pktopt->ip6po_dest1 = NULL; pktopt->ip6po_dest1 = NULL;
} }
if (optname == -1 || optname == IPV6_RTHDR) { if (optname == -1 || optname == IPV6_RTHDR) {
if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr) if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr)
free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT); free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT);
pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL; pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL;
if (pktopt->ip6po_route.ro_rt) { if (pktopt->ip6po_route.ro_nh) {
RTFREE(pktopt->ip6po_route.ro_rt); NH_FREE(pktopt->ip6po_route.ro_nh);
pktopt->ip6po_route.ro_rt = NULL; pktopt->ip6po_route.ro_nh = NULL;
} }
} }
if (optname == -1 || optname == IPV6_DSTOPTS) { if (optname == -1 || optname == IPV6_DSTOPTS) {
if (pktopt->ip6po_dest2) if (pktopt->ip6po_dest2)
free(pktopt->ip6po_dest2, M_IP6OPT); free(pktopt->ip6po_dest2, M_IP6OPT);
pktopt->ip6po_dest2 = NULL; pktopt->ip6po_dest2 = NULL;
} }
} }
▲ Show 20 Lines • Show All 644 Lines • Show Last 20 Lines