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Differential D27405 Diff 80116 head/sys/netinet6/in6_fib.c

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head/sys/netinet6/in6_fib.c

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struct nhop_object * struct nhop_object *
fib6_lookup(uint32_t fibnum, const struct in6_addr *dst6, fib6_lookup(uint32_t fibnum, const struct in6_addr *dst6,
uint32_t scopeid, uint32_t flags, uint32_t flowid) uint32_t scopeid, uint32_t flags, uint32_t flowid)
{ {
RIB_RLOCK_TRACKER; RIB_RLOCK_TRACKER;
struct rib_head *rh; struct rib_head *rh;
struct radix_node *rn; struct radix_node *rn;
struct nhop_object *nh; struct nhop_object *nh;
struct sockaddr_in6 sin6;
KASSERT((fibnum < rt_numfibs), ("fib6_lookup: bad fibnum")); KASSERT((fibnum < rt_numfibs), ("fib6_lookup: bad fibnum"));
rh = rt_tables_get_rnh(fibnum, AF_INET6); rh = rt_tables_get_rnh(fibnum, AF_INET6);
if (rh == NULL) if (rh == NULL)
return (NULL); return (NULL);
/* TODO: radix changes */ struct sockaddr_in6 sin6 = {
//addr = *dst6; .sin6_len = sizeof(struct sockaddr_in6),
/* Prepare lookup key */ .sin6_addr = *dst6,
memset(&sin6, 0, sizeof(sin6)); };
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr = *dst6;
/* Assume scopeid is valid and embed it directly */ /* Assume scopeid is valid and embed it directly */
if (IN6_IS_SCOPE_LINKLOCAL(dst6)) if (IN6_IS_SCOPE_LINKLOCAL(dst6))
sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff); sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff);
RIB_RLOCK(rh); RIB_RLOCK(rh);
rn = rh->rnh_matchaddr((void *)&sin6, &rh->head); rn = rh->rnh_matchaddr((void *)&sin6, &rh->head);
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
▲ Show 20 Lines • Show All 44 Lines • ▼ Show 20 Lines for (int i = 0; i < num_nhops; i++) {
return (1); return (1);
} }
return (0); return (0);
} else } else
#endif #endif
return (check_urpf_nhop(nh, flags, src_if)); return (check_urpf_nhop(nh, flags, src_if));
} }
/* static struct nhop_object *
* Performs reverse path forwarding lookup. lookup_nhop(uint32_t fibnum, const struct in6_addr *dst6,
* If @src_if is non-zero, verifies that at least 1 path goes via uint32_t scopeid)
* this interface.
* If @src_if is zero, verifies that route exist.
* if @flags contains NHR_NOTDEFAULT, do not consider default route.
*
* Returns 1 if route matching conditions is found, 0 otherwise.
*/
int
fib6_check_urpf(uint32_t fibnum, const struct in6_addr *dst6,
uint32_t scopeid, uint32_t flags, const struct ifnet *src_if)
{ {
RIB_RLOCK_TRACKER; RIB_RLOCK_TRACKER;
struct rib_head *rh; struct rib_head *rh;
struct radix_node *rn; struct radix_node *rn;
struct sockaddr_in6 sin6; struct nhop_object *nh;
int ret;
KASSERT((fibnum < rt_numfibs), ("fib6_check_urpf: bad fibnum")); KASSERT((fibnum < rt_numfibs), ("fib6_check_urpf: bad fibnum"));
rh = rt_tables_get_rnh(fibnum, AF_INET6); rh = rt_tables_get_rnh(fibnum, AF_INET6);
if (rh == NULL) if (rh == NULL)
return (0); return (NULL);
/* TODO: radix changes */
/* Prepare lookup key */ /* Prepare lookup key */
memset(&sin6, 0, sizeof(sin6)); struct sockaddr_in6 sin6 = {
sin6.sin6_len = sizeof(struct sockaddr_in6); .sin6_len = sizeof(struct sockaddr_in6),
sin6.sin6_addr = *dst6; .sin6_addr = *dst6,
};
/* Assume scopeid is valid and embed it directly */ /* Assume scopeid is valid and embed it directly */
if (IN6_IS_SCOPE_LINKLOCAL(dst6)) if (IN6_IS_SCOPE_LINKLOCAL(dst6))
sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff); sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff);
nh = NULL;
RIB_RLOCK(rh); RIB_RLOCK(rh);
rn = rh->rnh_matchaddr((void *)&sin6, &rh->head); rn = rh->rnh_matchaddr((void *)&sin6, &rh->head);
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0))
ret = check_urpf(RNTORT(rn)->rt_nhop, flags, src_if); nh = RNTORT(rn)->rt_nhop;
RIB_RUNLOCK(rh); RIB_RUNLOCK(rh);
return (ret);
return (nh);
} }
RIB_RUNLOCK(rh);
/*
* Performs reverse path forwarding lookup.
* If @src_if is non-zero, verifies that at least 1 path goes via
* this interface.
* If @src_if is zero, verifies that route exist.
* if @flags contains NHR_NOTDEFAULT, do not consider default route.
*
* Returns 1 if route matching conditions is found, 0 otherwise.
*/
int
fib6_check_urpf(uint32_t fibnum, const struct in6_addr *dst6,
uint32_t scopeid, uint32_t flags, const struct ifnet *src_if)
{
struct nhop_object *nh;
nh = lookup_nhop(fibnum, dst6, scopeid);
if (nh != NULL)
return (check_urpf(nh, flags, src_if));
return (0); return (0);
} }
struct nhop_object * /*
fib6_lookup_debugnet(uint32_t fibnum, const struct in6_addr *dst6, * Function returning prefix match data along with the nexthop data.
uint32_t scopeid, uint32_t flags) * Intended to be used by the control plane code.
* Supported flags:
* NHR_UNLOCKED: do not lock radix during lookup.
* Returns pointer to rtentry and raw nexthop in @rnd. Both rtentry
* and nexthop are safe to use within current epoch. Note:
* Note: rnd_nhop can actually be the nexthop group.
*/
struct rtentry *
fib6_lookup_rt(uint32_t fibnum, const struct in6_addr *dst6,
uint32_t scopeid, uint32_t flags, struct route_nhop_data *rnd)
{ {
RIB_RLOCK_TRACKER;
struct rib_head *rh; struct rib_head *rh;
struct radix_node *rn; struct radix_node *rn;
struct nhop_object *nh; struct rtentry *rt;
struct sockaddr_in6 sin6;
KASSERT((fibnum < rt_numfibs), ("fib6_lookup: bad fibnum")); KASSERT((fibnum < rt_numfibs), ("fib6_lookup: bad fibnum"));
rh = rt_tables_get_rnh(fibnum, AF_INET6); rh = rt_tables_get_rnh(fibnum, AF_INET6);
if (rh == NULL) if (rh == NULL)
return (NULL); return (NULL);
/* TODO: radix changes */ struct sockaddr_in6 sin6 = {
//addr = *dst6; .sin6_len = sizeof(struct sockaddr_in6),
/* Prepare lookup key */ .sin6_addr = *dst6,
memset(&sin6, 0, sizeof(sin6)); };
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr = *dst6;
/* Assume scopeid is valid and embed it directly */ /* Assume scopeid is valid and embed it directly */
if (IN6_IS_SCOPE_LINKLOCAL(dst6)) if (IN6_IS_SCOPE_LINKLOCAL(dst6))
sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff); sin6.sin6_addr.s6_addr16[1] = htons(scopeid & 0xffff);
rt = NULL;
if (!(flags & NHR_UNLOCKED))
RIB_RLOCK(rh);
rn = rh->rnh_matchaddr((void *)&sin6, &rh->head); rn = rh->rnh_matchaddr((void *)&sin6, &rh->head);
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
nh = nhop_select((RNTORT(rn))->rt_nhop, 0); rt = (struct rtentry *)rn;
rnd->rnd_nhop = rt->rt_nhop;
rnd->rnd_weight = rt->rt_weight;
}
if (!(flags & NHR_UNLOCKED))
RIB_RUNLOCK(rh);
return (rt);
}
struct nhop_object *
fib6_lookup_debugnet(uint32_t fibnum, const struct in6_addr *dst6,
uint32_t scopeid, uint32_t flags)
{
struct rtentry *rt;
struct route_nhop_data rnd;
rt = fib6_lookup_rt(fibnum, dst6, scopeid, NHR_UNLOCKED, &rnd);
if (rt != NULL) {
struct nhop_object *nh = nhop_select(rnd.rnd_nhop, 0);
/* Ensure route & ifp is UP */ /* Ensure route & ifp is UP */
if (RT_LINK_IS_UP(nh->nh_ifp)) { if (RT_LINK_IS_UP(nh->nh_ifp))
if (flags & NHR_REF)
nhop_ref_object(nh);
return (nh); return (nh);
}
} }
return (NULL); return (NULL);
} }
#endif #endif