/*
* Performs IPv4 route table lookup on @dst. Returns 0 on success.
* Stores nexthop info provided @pnh4 structure.
* Note that
* - nh_ifp cannot be safely dereferenced
* - nh_ifp represents logical transmit interface (rt_ifp) (e.g. if
* looking up address on interface "ix0" pointer to "lo0" interface
* will be returned instead of "ix0")
* - nh_ifp represents "address" interface if NHR_IFAIF flag is passed
* - howewer mtu from "transmit" interface will be returned.
*/
int
fib4_lookup_nh_basic(uint32_t fibnum, struct in_addr dst, uint32_t flags,
uint32_t flowid, struct nhop4_basic *pnh4)
{
struct radix_node_head *rh;
struct radix_node *rn;
struct sockaddr_in sin;
struct rtentry *rte;
KASSERT((fibnum < rt_numfibs), ("fib4_lookup_nh_basic: bad fibnum"));
rh = rt_tables_get_rnh(fibnum, AF_INET);
if (rh == NULL)
return (ENOENT);
/* Prepare lookup key */
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_addr = dst;
RADIX_NODE_HEAD_RLOCK(rh);
rn = rh->rnh_matchaddr((void *)&sin, rh);
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
rte = RNTORT(rn);
/* Ensure route & ifp is UP */
if (RT_LINK_IS_UP(rte->rt_ifp)) {
fib4_rte_to_nh_basic(rte, dst, flags, pnh4);
RADIX_NODE_HEAD_RUNLOCK(rh);
return (0);
}
}
RADIX_NODE_HEAD_RUNLOCK(rh);
return (ENOENT);
}
void
bootpboot_p_rtlist(void)
{
struct radix_node_head *rnh;
printf("Routing table:\n");
rnh = rt_tables_get_rnh(0, AF_INET);
if (rnh == NULL)
return;
RADIX_NODE_HEAD_RLOCK(rnh); /* could sleep XXX */
bootpboot_p_tree(rnh->rnh_treetop);
RADIX_NODE_HEAD_RUNLOCK(rnh);
}
/*
* Performs IPv6 route table lookup on @dst. Returns 0 on success.
* Stores extended nexthop info into provided @pnh6 structure.
* Note that
* - nh_ifp cannot be safely dereferenced unless NHR_REF is specified.
* - in that case you need to call fib6_free_nh_ext()
* - nh_ifp represents logical transmit interface (rt_ifp) by default
* - nh_ifp represents "address" interface if NHR_IFAIF flag is passed
* - mtu from logical transmit interface will be returned.
* - scope will be embedded in nh_addr
*/
int
fib6_lookup_nh_ext(uint32_t fibnum, const struct in6_addr *dst,uint32_t scopeid,
uint32_t flags, uint32_t flowid, struct nhop6_extended *pnh6)
{
struct radix_node_head *rh;
struct radix_node *rn;
struct sockaddr_in6 sin6;
struct rtentry *rte;
KASSERT((fibnum < rt_numfibs), ("fib6_lookup_nh_ext: bad fibnum"));
rh = rt_tables_get_rnh(fibnum, AF_INET6);
if (rh == NULL)
return (ENOENT);
/* Prepare lookup key */
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr = *dst;
/* Assume scopeid is valid and embed it directly */
if (IN6_IS_SCOPE_LINKLOCAL(dst))
sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff);
RADIX_NODE_HEAD_RLOCK(rh);
rn = rh->rnh_matchaddr((void *)&sin6, rh);
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
rte = RNTORT(rn);
/* Ensure route & ifp is UP */
if (RT_LINK_IS_UP(rte->rt_ifp)) {
fib6_rte_to_nh_extended(rte, &sin6.sin6_addr, flags,
pnh6);
if ((flags & NHR_REF) != 0) {
/* TODO: Do lwref on egress ifp's */
}
RADIX_NODE_HEAD_RUNLOCK(rh);
return (0);
}
}
RADIX_NODE_HEAD_RUNLOCK(rh);
return (ENOENT);
}
/*
* Used by the filesystems to determine if a given network address
* (passed in 'nam') is present in their exports list, returns a pointer
* to struct netcred so that the filesystem can examine it for
* access rights (read/write/etc).
*/
static struct netcred *
vfs_export_lookup(struct mount *mp, struct sockaddr *nam)
{
struct netexport *nep;
register struct netcred *np;
register struct radix_node_head *rnh;
struct sockaddr *saddr;
nep = mp->mnt_export;
if (nep == NULL)
return (NULL);
np = NULL;
if (mp->mnt_flag & MNT_EXPORTED) {
/*
* Lookup in the export list first.
*/
if (nam != NULL) {
saddr = nam;
rnh = nep->ne_rtable[saddr->sa_family];
if (rnh != NULL) {
RADIX_NODE_HEAD_RLOCK(rnh);
np = (struct netcred *)
(*rnh->rnh_matchaddr)(saddr, rnh);
RADIX_NODE_HEAD_RUNLOCK(rnh);
if (np && np->netc_rnodes->rn_flags & RNF_ROOT)
np = NULL;
}
}
/*
* If no address match, use the default if it exists.
*/
if (np == NULL && mp->mnt_flag & MNT_DEFEXPORTED)
np = &nep->ne_defexported;
}
return (np);
}
