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routing: Allow using IPv6 next-hops for IPv4 routes (RFC 5549).

Browse Source 
Implement kernel support for RFC 5549/8950.

* Relax control plane restrictions and allow specifying IPv6 gateways
 for IPv4 routes. This behavior is controlled by the
 net.route.rib_route_ipv6_nexthop sysctl (on by default).

* Always pass final destination in ro->ro_dst in ip_forward().

* Use ro->ro_dst to exract packet family inside if_output() routines.
 Consistently use RO_GET_FAMILY() macro to handle ro=NULL case.

* Pass extracted family to nd6_resolve() to get the LLE with proper encap.
 It leverages recent lltable changes committed in c541bd368f.

Presence of the functionality can be checked using ipv4_rfc5549_support feature(3).
Example usage:
  route add -net 192.0.0.0/24 -inet6 fe80::5054:ff:fe14:e319%vtnet0

Differential Revision: https://reviews.freebsd.org/D30398
MFC after:	2 weeks
This commit is contained in:
Zhenlei Huang 2021-08-22 22:28:47 +00:00 committed by Alexander V. Chernikov
parent eccb516db8
commit 62e1a437f3
23 changed files with 168 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
sys/contrib/ipfilter/netinet/ip_fil_freebsd.c
View File

@ -689,7 +689,9 @@ ipf_fastroute(m0, mpp, fin, fdp)
register struct mbuf *m = *mpp;
int len, off, error = 0, hlen, code;
struct ifnet *ifp, *sifp;
struct sockaddr_in dst;
struct route ro;
struct sockaddr_in *dst;
const struct sockaddr *gw;
struct nhop_object *nh;
u_long fibnum = 0;
u_short ip_off;
@ -739,10 +741,12 @@ ipf_fastroute(m0, mpp, fin, fdp)
/*
* Route packet.
*/
bzero(&dst, sizeof (dst));
dst.sin_family = AF_INET;
dst.sin_addr = ip->ip_dst;
dst.sin_len = sizeof(dst);
bzero(&ro, sizeof (ro));
dst = (struct sockaddr_in *)&ro.ro_dst;
dst->sin_family = AF_INET;
dst->sin_addr = ip->ip_dst;
dst->sin_len = sizeof(dst);
gw = (const struct sockaddr *)dst;
fr = fin->fin_fr;
if ((fr != NULL) && !(fr->fr_flags & FR_KEEPSTATE) && (fdp != NULL) &&
@ -762,11 +766,11 @@ ipf_fastroute(m0, mpp, fin, fdp)
}
if ((fdp != NULL) && (fdp->fd_ip.s_addr != 0))
dst.sin_addr = fdp->fd_ip;
dst->sin_addr = fdp->fd_ip;
fibnum = M_GETFIB(m0);
NET_EPOCH_ASSERT();
nh = fib4_lookup(fibnum, dst.sin_addr, 0, NHR_NONE, 0);
nh = fib4_lookup(fibnum, dst->sin_addr, 0, NHR_NONE, 0);
if (nh == NULL) {
if (in_localaddr(ip->ip_dst))
error = EHOSTUNREACH;
@ -777,8 +781,10 @@ ipf_fastroute(m0, mpp, fin, fdp)
if (ifp == NULL)
ifp = nh->nh_ifp;
if (nh->nh_flags & NHF_GATEWAY)
dst.sin_addr = nh->gw4_sa.sin_addr;
if (nh->nh_flags & NHF_GATEWAY) {
gw = &nh->gw_sa;
ro.ro_flags |= RT_HAS_GW;
}
/*
* For input packets which are being "fastrouted", they won't
@ -822,9 +828,7 @@ ipf_fastroute(m0, mpp, fin, fdp)
if (ntohs(ip->ip_len) <= ifp->if_mtu) {
if (!ip->ip_sum)
ip->ip_sum = in_cksum(m, hlen);
error = (*ifp->if_output)(ifp, m, (struct sockaddr *)&dst,
NULL
);
error = (*ifp->if_output)(ifp, m, gw, &ro);
goto done;
}
/*
@ -904,10 +908,7 @@ ipf_fastroute(m0, mpp, fin, fdp)
m0 = m->m_act;
m->m_act = 0;
if (error == 0)
error = (*ifp->if_output)(ifp, m,
(struct sockaddr *)&dst,
NULL
);
error = (*ifp->if_output)(ifp, m, gw, &ro);
else
FREE_MB_T(m);
}

3
sys/dev/cxgbe/tom/t4_listen.c
View File

@ -1113,7 +1113,10 @@ get_l2te_for_nexthop(struct port_info *pi, struct ifnet *ifp,
if (nh->nh_ifp != ifp)
return (NULL);
if (nh->nh_flags & NHF_GATEWAY)
if (nh->gw_sa.sa_family == AF_INET)
((struct sockaddr_in *)dst)->sin_addr = nh->gw4_sa.sin_addr;
else
*((struct sockaddr_in6 *)dst) = nh->gw6_sa;
else
((struct sockaddr_in *)dst)->sin_addr = inc->inc_faddr;
}

2
sys/dev/iicbus/if_ic.c
View File

@ -372,7 +372,7 @@ icoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &hdr, sizeof(hdr));
else
hdr = dst->sa_family;
hdr = RO_GET_FAMILY(ro, dst);
mtx_lock(&sc->ic_lock);
ifp->if_drv_flags |= IFF_DRV_RUNNING;

1
sys/net/debugnet.c
View File

@ -673,6 +673,7 @@ debugnet_connect(const struct debugnet_conn_params *dcp,
goto cleanup;
}
/* TODO support AF_INET6 */
if (nh->gw_sa.sa_family == AF_INET)
gw_sin = &nh->gw4_sa;
else {

2
sys/net/if_disc.c
View File

@ -185,7 +185,7 @@ discoutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
if (bpf_peers_present(ifp->if_bpf))
bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m);

11
sys/net/if_ethersubr.c
View File

@ -236,10 +236,11 @@ ether_resolve_addr(struct ifnet *ifp, struct mbuf *m,
#endif
#ifdef INET6
case AF_INET6:
if ((m->m_flags & M_MCAST) == 0)
error = nd6_resolve(ifp, LLE_SF(AF_INET6, 0), m, dst, phdr,
if ((m->m_flags & M_MCAST) == 0) {
int af = RO_GET_FAMILY(ro, dst);
error = nd6_resolve(ifp, LLE_SF(af, 0), m, dst, phdr,
&lleflags, plle);
else {
} else {
const struct in6_addr *a6;
a6 = &(((const struct sockaddr_in6 *)dst)->sin6_addr);
ETHER_MAP_IPV6_MULTICAST(a6, eh->ether_dhost);
@ -353,7 +354,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
if ((pflags & RT_L2_ME) != 0) {
update_mbuf_csumflags(m, m);
return (if_simloop(ifp, m, dst->sa_family, 0));
return (if_simloop(ifp, m, RO_GET_FAMILY(ro, dst), 0));
}
loop_copy = (pflags & RT_MAY_LOOP) != 0;
@ -400,7 +401,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
*/
if ((n = m_dup(m, M_NOWAIT)) != NULL) {
update_mbuf_csumflags(m, n);
(void)if_simloop(ifp, n, dst->sa_family, hlen);
(void)if_simloop(ifp, n, RO_GET_FAMILY(ro, dst), hlen);
} else
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
}

28
sys/net/if_fwsubr.c
View File

@ -94,6 +94,7 @@ firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
#if defined(INET) || defined(INET6)
int is_gw = 0;
#endif
int af = RO_GET_FAMILY(ro, dst);
#ifdef MAC
error = mac_ifnet_check_transmit(ifp, m);
@ -137,6 +138,26 @@ firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
destfw = NULL;
}
switch (af) {
#ifdef INET
case AF_INET:
type = ETHERTYPE_IP;
break;
case AF_ARP:
type = ETHERTYPE_ARP;
break;
#endif
#ifdef INET6
case AF_INET6:
type = ETHERTYPE_IPV6;
break;
#endif
default:
if_printf(ifp, "can't handle af%d\n", af);
error = EAFNOSUPPORT;
goto bad;
}
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
@ -151,7 +172,6 @@ firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (error)
return (error == EWOULDBLOCK ? 0 : error);
}
type = ETHERTYPE_IP;
break;
case AF_ARP:
@ -159,7 +179,6 @@ firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
struct arphdr *ah;
ah = mtod(m, struct arphdr *);
ah->ar_hrd = htons(ARPHRD_IEEE1394);
type = ETHERTYPE_ARP;
if (unicast)
*destfw = *(struct fw_hwaddr *) ar_tha(ah);
@ -176,12 +195,11 @@ firewire_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
#ifdef INET6
case AF_INET6:
if (unicast) {
error = nd6_resolve(fc->fc_ifp, LLE_SF(AF_INET6, is_gw),
m, dst, (u_char *) destfw, NULL, NULL);
error = nd6_resolve(fc->fc_ifp, LLE_SF(af, is_gw), m,
dst, (u_char *) destfw, NULL, NULL);
if (error)
return (error == EWOULDBLOCK ? 0 : error);
}
type = ETHERTYPE_IPV6;
break;
#endif

2
sys/net/if_gif.c
View File

@ -409,7 +409,7 @@ gif_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
/*
* Now save the af in the inbound pkt csum data, this is a cheat since
* we are using the inbound csum_data field to carry the af over to

2
sys/net/if_gre.c
View File

@ -613,7 +613,7 @@ gre_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
/*
* Now save the af in the inbound pkt csum data, this is a cheat since
* we are using the inbound csum_data field to carry the af over to

7
sys/net/if_infiniband.c
View File

@ -253,8 +253,9 @@ infiniband_resolve_addr(struct ifnet *ifp, struct mbuf *m,
#ifdef INET6
case AF_INET6:
if ((m->m_flags & M_MCAST) == 0) {
error = nd6_resolve(ifp, LLE_SF(AF_INET6, 0), m, dst,
phdr, &lleflags, plle);
int af = RO_GET_FAMILY(ro, dst);
error = nd6_resolve(ifp, LLE_SF(af, 0), m, dst, phdr,
&lleflags, plle);
} else {
infiniband_ipv6_multicast_map(
&((const struct sockaddr_in6 *)dst)->sin6_addr,
@ -371,7 +372,7 @@ infiniband_output(struct ifnet *ifp, struct mbuf *m,
if ((pflags & RT_L2_ME) != 0) {
update_mbuf_csumflags(m, m);
return (if_simloop(ifp, m, dst->sa_family, 0));
return (if_simloop(ifp, m, RO_GET_FAMILY(ro, dst), 0));
}
/*

2
sys/net/if_loop.c
View File

@ -235,7 +235,7 @@ looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC || dst->sa_family == pseudo_AF_HDRCMPLT)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
#if 1 /* XXX */
switch (af) {

4
sys/net/if_me.c
View File

@ -533,14 +533,14 @@ me_input(struct mbuf *m, int off, int proto, void *arg)
static int
me_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
struct route *ro __unused)
struct route *ro)
{
uint32_t af;
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
m->m_pkthdr.csum_data = af;
return (ifp->if_transmit(ifp, m));
}

11
sys/net/if_spppsubr.c
View File

@ -780,6 +780,7 @@ sppp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
int ipproto = PPP_IP;
#endif
int debug = ifp->if_flags & IFF_DEBUG;
int af = RO_GET_FAMILY(ro, dst);
SPPP_LOCK(sp);
@ -805,7 +806,7 @@ sppp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
* dialout event in case IPv6 has been
* administratively disabled on that interface.
*/
if (dst->sa_family == AF_INET6 &&
if (af == AF_INET6 &&
!(sp->confflags & CONF_ENABLE_IPV6))
goto drop;
#endif
@ -818,7 +819,7 @@ sppp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
}
#ifdef INET
if (dst->sa_family == AF_INET) {
if (af == AF_INET) {
/* XXX Check mbuf length here? */
struct ip *ip = mtod (m, struct ip*);
struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
@ -888,14 +889,14 @@ sppp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
#endif
#ifdef INET6
if (dst->sa_family == AF_INET6) {
if (af == AF_INET6) {
/* XXX do something tricky here? */
}
#endif
if (sp->pp_mode == PP_FR) {
/* Add frame relay header. */
m = sppp_fr_header (sp, m, dst->sa_family);
m = sppp_fr_header (sp, m, af);
if (! m)
goto nobufs;
goto out;
@ -926,7 +927,7 @@ nobufs: if (debug)
h->control = PPP_UI; /* Unnumbered Info */
}
switch (dst->sa_family) {
switch (af) {
#ifdef INET
case AF_INET: /* Internet Protocol */
if (sp->pp_mode == IFF_CISCO)

2
sys/net/if_tuntap.c
View File

@ -1402,7 +1402,7 @@ tunoutput(struct ifnet *ifp, struct mbuf *m0, const struct sockaddr *dst,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
if (bpf_peers_present(ifp->if_bpf))
bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m0);

4
sys/net/route.h
View File

@ -394,6 +394,10 @@ struct rt_addrinfo {
} \
} while (0)
#define RO_GET_FAMILY(ro, dst) ((ro) != NULL && \
(ro)->ro_flags & RT_HAS_GW \
? (ro)->ro_dst.sa_family : (dst)->sa_family)
/*
* Validate a cached route based on a supplied cookie. If there is an
* out-of-date cache, simply free it. Update the generation number

28
sys/net/route/route_ctl.c
View File

@ -106,6 +106,14 @@ SYSCTL_UINT(_net_route, OID_AUTO, multipath, _MP_FLAGS | CTLFLAG_VNET,
&VNET_NAME(rib_route_multipath), 0, "Enable route multipath");
#undef _MP_FLAGS
#if defined(INET) && defined(INET6)
FEATURE(ipv4_rfc5549_support, "Route IPv4 packets via IPv6 nexthops");
#define V_rib_route_ipv6_nexthop VNET(rib_route_ipv6_nexthop)
VNET_DEFINE(u_int, rib_route_ipv6_nexthop) = 1;
SYSCTL_UINT(_net_route, OID_AUTO, ipv6_nexthop, CTLFLAG_RW | CTLFLAG_VNET,
&VNET_NAME(rib_route_ipv6_nexthop), 0, "Enable IPv4 route via IPv6 Next Hop address");
#endif
/* Routing table UMA zone */
VNET_DEFINE_STATIC(uma_zone_t, rtzone);
#define V_rtzone VNET(rtzone)
@ -197,6 +205,20 @@ get_rnh(uint32_t fibnum, const struct rt_addrinfo *info)
return (rnh);
}
#if defined(INET) && defined(INET6)
static bool
rib_can_ipv6_nexthop_address(struct rib_head *rh)
{
int result;
CURVNET_SET(rh->rib_vnet);
result = !!V_rib_route_ipv6_nexthop;
CURVNET_RESTORE();
return (result);
}
#endif
#ifdef ROUTE_MPATH
static bool
rib_can_multipath(struct rib_head *rh)
@ -582,6 +604,12 @@ check_gateway(struct rib_head *rnh, struct sockaddr *dst,
return (true);
else if (gateway->sa_family == AF_LINK)
return (true);
#if defined(INET) && defined(INET6)
else if (dst->sa_family == AF_INET && gateway->sa_family == AF_INET6 &&
rib_can_ipv6_nexthop_address(rnh))
return (true);
#endif
else
return (false);
}

4
sys/netgraph/netflow/netflow.c
View File

@ -364,6 +364,10 @@ hash_insert(priv_p priv, struct flow_hash_entry *hsh, struct flow_rec *r,
fle->f.fle_o_ifx = nh->nh_ifp->if_index;
if (nh->gw_sa.sa_family == AF_INET)
fle->f.next_hop = nh->gw4_sa.sin_addr;
/*
* XXX we're leaving an empty gateway here for
* IPv6 nexthops.
*/
fle->f.dst_mask = plen;
}
}

2
sys/netgraph/ng_iface.c
View File

@ -371,7 +371,7 @@ ng_iface_output(struct ifnet *ifp, struct mbuf *m,
if (dst->sa_family == AF_UNSPEC)
bcopy(dst->sa_data, &af, sizeof(af));
else
af = dst->sa_family;
af = RO_GET_FAMILY(ro, dst);
/* Berkeley packet filter */
ng_iface_bpftap(ifp, m, af);

29
sys/netinet/ip_fastfwd.c
View File

@ -199,7 +199,9 @@ ip_tryforward(struct mbuf *m)
struct ip *ip;
struct mbuf *m0 = NULL;
struct nhop_object *nh = NULL;
struct sockaddr_in dst;
struct route ro;
struct sockaddr_in *dst;
const struct sockaddr *gw;
struct in_addr dest, odest, rtdest;
uint16_t ip_len, ip_off;
int error = 0;
@ -421,19 +423,23 @@ ip_tryforward(struct mbuf *m)
ip_len = ntohs(ip->ip_len);
ip_off = ntohs(ip->ip_off);
bzero(&dst, sizeof(dst));
dst.sin_family = AF_INET;
dst.sin_len = sizeof(dst);
if (nh->nh_flags & NHF_GATEWAY)
dst.sin_addr = nh->gw4_sa.sin_addr;
else
dst.sin_addr = dest;
bzero(&ro, sizeof(ro));
dst = (struct sockaddr_in *)&ro.ro_dst;
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = dest;
if (nh->nh_flags & NHF_GATEWAY) {
gw = &nh->gw_sa;
ro.ro_flags |= RT_HAS_GW;
} else
gw = (const struct sockaddr *)dst;
/*
* Handle redirect case.
*/
redest.s_addr = 0;
if (V_ipsendredirects && (nh->nh_ifp == m->m_pkthdr.rcvif))
if (V_ipsendredirects && (nh->nh_ifp == m->m_pkthdr.rcvif) &&
gw->sa_family == AF_INET)
mcopy = ip_redir_alloc(m, nh, ip, &redest.s_addr);
/*
@ -448,8 +454,7 @@ ip_tryforward(struct mbuf *m)
* Send off the packet via outgoing interface
*/
IP_PROBE(send, NULL, NULL, ip, nh->nh_ifp, ip, NULL);
error = (*nh->nh_ifp->if_output)(nh->nh_ifp, m,
(struct sockaddr *)&dst, NULL);
error = (*nh->nh_ifp->if_output)(nh->nh_ifp, m, gw, &ro);
} else {
/*
* Handle EMSGSIZE with icmp reply needfrag for TCP MTU discovery
@ -484,7 +489,7 @@ ip_tryforward(struct mbuf *m)
mtod(m, struct ip *), nh->nh_ifp,
mtod(m, struct ip *), NULL);
error = (*nh->nh_ifp->if_output)(nh->nh_ifp, m,
(struct sockaddr *)&dst, NULL);
gw, &ro);
if (error)
break;
} while ((m = m0) != NULL);

11
sys/netinet/ip_input.c
View File

@ -1065,13 +1065,16 @@ ip_forward(struct mbuf *m, int srcrt)
if (nh_ia != NULL &&
(src & nh_ia->ia_subnetmask) == nh_ia->ia_subnet) {
if (nh->nh_flags & NHF_GATEWAY)
dest.s_addr = nh->gw4_sa.sin_addr.s_addr;
else
dest.s_addr = ip->ip_dst.s_addr;
/* Router requirements says to only send host redirects */
type = ICMP_REDIRECT;
code = ICMP_REDIRECT_HOST;
if (nh->nh_flags & NHF_GATEWAY) {
if (nh->gw_sa.sa_family == AF_INET)
dest.s_addr = nh->gw4_sa.sin_addr.s_addr;
else /* Do not redirect in case gw is AF_INET6 */
type = 0;
} else
dest.s_addr = ip->ip_dst.s_addr;
}
}
}

51
sys/netinet/ip_output.c
View File

@ -212,7 +212,7 @@ ip_output_pfil(struct mbuf **mp, struct ifnet *ifp, int flags,
static int
ip_output_send(struct inpcb *inp, struct ifnet *ifp, struct mbuf *m,
const struct sockaddr_in *gw, struct route *ro, bool stamp_tag)
const struct sockaddr *gw, struct route *ro, bool stamp_tag)
{
#ifdef KERN_TLS
struct ktls_session *tls = NULL;
@ -273,7 +273,7 @@ ip_output_send(struct inpcb *inp, struct ifnet *ifp, struct mbuf *m,
m->m_pkthdr.csum_flags |= CSUM_SND_TAG;
}
error = (*ifp->if_output)(ifp, m, (const struct sockaddr *)gw, ro);
error = (*ifp->if_output)(ifp, m, gw, ro);
done:
/* Check for route change invalidating send tags. */
@ -329,12 +329,13 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
int mtu = 0;
int error = 0;
int vlan_pcp = -1;
struct sockaddr_in *dst, sin;
const struct sockaddr_in *gw;
struct sockaddr_in *dst;
const struct sockaddr *gw;
struct in_ifaddr *ia = NULL;
struct in_addr src;
int isbroadcast;
uint16_t ip_len, ip_off;
struct route iproute;
uint32_t fibnum;
#if defined(IPSEC) || defined(IPSEC_SUPPORT)
int no_route_but_check_spd = 0;
@ -386,23 +387,23 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
* therefore we need restore gw if we're redoing lookup.
*/
fibnum = (inp != NULL) ? inp->inp_inc.inc_fibnum : M_GETFIB(m);
if (ro != NULL)
if (ro == NULL) {
ro = &iproute;
bzero(ro, sizeof (*ro));
}
dst = (struct sockaddr_in *)&ro->ro_dst;
else
dst = &sin;
if (ro == NULL || ro->ro_nh == NULL) {
bzero(dst, sizeof(*dst));
if (ro->ro_nh == NULL) {
dst->sin_family = AF_INET;
dst->sin_len = sizeof(*dst);
dst->sin_addr = ip->ip_dst;
}
gw = dst;
gw = (const struct sockaddr *)dst;
again:
/*
* Validate route against routing table additions;
* a better/more specific route might have been added.
*/
if (inp != NULL && ro != NULL && ro->ro_nh != NULL)
if (inp != NULL && ro->ro_nh != NULL)
NH_VALIDATE(ro, &inp->inp_rt_cookie, fibnum);
/*
* If there is a cached route,
@ -412,7 +413,7 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
* cache with IPv6.
* Also check whether routing cache needs invalidation.
*/
if (ro != NULL && ro->ro_nh != NULL &&
if (ro->ro_nh != NULL &&
((!NH_IS_VALID(ro->ro_nh)) || dst->sin_family != AF_INET ||
dst->sin_addr.s_addr != ip->ip_dst.s_addr))
RO_INVALIDATE_CACHE(ro);
@ -469,7 +470,7 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
src = IA_SIN(ia)->sin_addr;
else
src.s_addr = INADDR_ANY;
} else if (ro != NULL) {
} else if (ro != &iproute) {
if (ro->ro_nh == NULL) {
/*
* We want to do any cloning requested by the link
@ -502,11 +503,11 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
counter_u64_add(nh->nh_pksent, 1);
rt_update_ro_flags(ro, nh);
if (nh->nh_flags & NHF_GATEWAY)
gw = &nh->gw4_sa;
gw = &nh->gw_sa;
if (nh->nh_flags & NHF_HOST)
isbroadcast = (nh->nh_flags & NHF_BROADCAST);
else if (ifp->if_flags & IFF_BROADCAST)
isbroadcast = in_ifaddr_broadcast(gw->sin_addr, ia);
else if ((ifp->if_flags & IFF_BROADCAST) && (gw->sa_family == AF_INET))
isbroadcast = in_ifaddr_broadcast(((const struct sockaddr_in *)gw)->sin_addr, ia);
else
isbroadcast = 0;
mtu = nh->nh_mtu;
@ -531,22 +532,16 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
}
ifp = nh->nh_ifp;
mtu = nh->nh_mtu;
/*
* We are rewriting here dst to be gw actually, contradicting
* comment at the beginning of the function. However, in this
* case we are always dealing with on stack dst.
* In case if pfil(9) sends us back to beginning of the
* function, the dst would be rewritten by ip_output_pfil().
*/
MPASS(dst == &sin);
rt_update_ro_flags(ro, nh);
if (nh->nh_flags & NHF_GATEWAY)
dst->sin_addr = nh->gw4_sa.sin_addr;
gw = &nh->gw_sa;
ia = ifatoia(nh->nh_ifa);
src = IA_SIN(ia)->sin_addr;
isbroadcast = (((nh->nh_flags & (NHF_HOST | NHF_BROADCAST)) ==
(NHF_HOST | NHF_BROADCAST)) ||
((ifp->if_flags & IFF_BROADCAST) &&
in_ifaddr_broadcast(dst->sin_addr, ia)));
(gw->sa_family == AF_INET) &&
in_ifaddr_broadcast(((const struct sockaddr_in *)gw)->sin_addr, ia)));
}
/* Catch a possible divide by zero later. */
@ -561,7 +556,7 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
* still points to the address in "ro". (It may have been
* changed to point to a gateway address, above.)
*/
gw = dst;
gw = (const struct sockaddr *)dst;
/*
* See if the caller provided any multicast options
*/
@ -721,7 +716,7 @@ ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags,
RO_NHFREE(ro);
ro->ro_prepend = NULL;
}
gw = dst;
gw = (const struct sockaddr *)dst;
ip = mtod(m, struct ip *);
goto again;
}

3
sys/netinet/toecore.c
View File

@ -483,7 +483,8 @@ toe_l2_resolve(struct toedev *tod, struct ifnet *ifp, struct sockaddr *sa,
#endif
#ifdef INET6
case AF_INET6:
rc = nd6_resolve(ifp, LLE_SF(AF_INET6, 0), NULL, sa, lladdr, NULL, NULL);
rc = nd6_resolve(ifp, LLE_SF(AF_INET6, 0), NULL, sa, lladdr,
NULL, NULL);
break;
#endif
default:

8
sys/ofed/drivers/infiniband/core/ib_addr.c
View File

@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$");
#include <net/route.h>
#include <net/route/nhop.h>
#include <net/netevent.h>
#include <net/if_llatbl.h>
#include <rdma/ib_addr.h>
#include <rdma/ib.h>
@ -397,9 +398,16 @@ static int addr4_resolve(struct sockaddr_in *src_in,
} else {
bool is_gw = (nh->nh_flags & NHF_GATEWAY) != 0;
memset(edst, 0, MAX_ADDR_LEN);
#ifdef INET6
if (is_gw && nh->gw_sa.sa_family == AF_INET6)
error = nd6_resolve(ifp, LLE_SF(AF_INET, is_gw), NULL,
&nh->gw_sa, edst, NULL, NULL);
else
#endif
error = arpresolve(ifp, is_gw, NULL, is_gw ?
&nh->gw_sa : (const struct sockaddr *)&dst_tmp,
edst, NULL, NULL);
if (error != 0)
goto error_put_ifp;
else if (is_gw)