return ip6_fib_lookup_with_table (lcm->im6, fib_index, &ip_addr_v6(dst));
}
+static u32
+get_egress_iface_for_dst (lisp_cp_main_t * lcm, ip_address_t * dst)
+{
+ u32 adj_index;
+ ip_adjacency_t * adj;
+ ip_lookup_main_t * lm;
+
+ lm = ip_addr_version (dst) == IP4 ?
+ &lcm->im4->lookup_main : &lcm->im6->lookup_main;
+
+ adj_index = ip_fib_lookup_with_table (lcm, 0, dst);
+ adj = ip_get_adjacency (lm, adj_index);
+
+ if (adj == 0)
+ return ~0;
+
+ return adj->rewrite_header.sw_if_index;
+}
+
void
-get_mr_and_local_iface_ip (lisp_cp_main_t *lcm, ip_address_t * mr_ip,
- ip_address_t * sloc)
+get_first_local_ip_for_dst (lisp_cp_main_t * lcm, ip_address_t * dst,
+ ip_address_t * result)
{
u32 adj_index;
ip_adjacency_t * adj;
ip_lookup_main_t * lm;
ip4_address_t * l4 = 0;
ip6_address_t * l6 = 0;
- ip_address_t * mrit;
- if (vec_len(lcm->map_resolvers) == 0)
- {
- clib_warning("No map-resolver configured");
- return;
- }
+ ASSERT(result != 0);
- /* find the first mr ip we have a route to and the ip of the
- * iface that has a route to it */
- vec_foreach(mrit, lcm->map_resolvers)
- {
- lm = ip_addr_version (mrit) == IP4 ?
- &lcm->im4->lookup_main : &lcm->im6->lookup_main;
+ lm = ip_addr_version (dst) == IP4 ?
+ &lcm->im4->lookup_main : &lcm->im6->lookup_main;
- adj_index = ip_fib_lookup_with_table (lcm, 0, mrit);
- adj = ip_get_adjacency (lm, adj_index);
+ adj_index = ip_fib_lookup_with_table (lcm, 0, dst);
+ adj = ip_get_adjacency (lm, adj_index);
- if (adj == 0)
- continue;
+ if (adj == 0)
+ return;
- if (adj->lookup_next_index == IP_LOOKUP_NEXT_ARP)
+ if (adj->lookup_next_index == IP_LOOKUP_NEXT_ARP)
+ {
+ ia = pool_elt_at_index(lm->if_address_pool, adj->if_address_index);
+ if (ip_addr_version(dst) == IP4)
{
- ia = pool_elt_at_index(lm->if_address_pool, adj->if_address_index);
- if (ip_addr_version(mrit) == IP4)
- {
- l4 = ip_interface_address_get_address (lm, ia);
- }
- else
- {
- l6 = ip_interface_address_get_address (lm, ia);
- }
+ l4 = ip_interface_address_get_address (lm, ia);
}
- else if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
+ else
{
- /* find sw_if_index in rewrite header */
- u32 sw_if_index = adj->rewrite_header.sw_if_index;
-
- /* find suitable address */
- if (ip_addr_version(mrit) == IP4)
- {
- /* find the first ip address */
- foreach_ip_interface_address (&lcm->im4->lookup_main, ia,
- sw_if_index, 1 /* unnumbered */,
- ({
- l4 = ip_interface_address_get_address (&lcm->im4->lookup_main,
- ia);
- break;
- }));
- }
- else
- {
- /* find the first ip address */
- foreach_ip_interface_address (&lcm->im6->lookup_main, ia,
- sw_if_index, 1 /* unnumbered */,
- ({
- l6 = ip_interface_address_get_address (&lcm->im6->lookup_main,
- ia);
- break;
- }));
- }
+ l6 = ip_interface_address_get_address (lm, ia);
}
+ }
+ else if (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE)
+ {
+ /* find sw_if_index in rewrite header */
+ u32 sw_if_index = adj->rewrite_header.sw_if_index;
- if (l4)
+ /* find suitable address */
+ if (ip_addr_version(dst) == IP4)
{
- ip_addr_v4(sloc).as_u32 = l4->as_u32;
- ip_addr_version(sloc) = IP4;
- ip_address_copy(mr_ip, mrit);
- return;
+ /* find the first ip address */
+ foreach_ip_interface_address (&lcm->im4->lookup_main, ia,
+ sw_if_index, 1 /* unnumbered */,
+ ({
+ l4 = ip_interface_address_get_address (&lcm->im4->lookup_main, ia);
+ break;
+ }));
}
- else if (l6)
+ else
{
- clib_memcpy (&ip_addr_v6(sloc), l6, sizeof(*l6));
- ip_addr_version(sloc) = IP6;
+ /* find the first ip address */
+ foreach_ip_interface_address (&lcm->im6->lookup_main, ia,
+ sw_if_index, 1 /* unnumbered */,
+ ({
+ l6 = ip_interface_address_get_address (&lcm->im6->lookup_main, ia);
+ break;
+ }));
+ }
+ }
+
+ if (l4)
+ ip_address_set (result, l4, IP4);
+ else if (l6)
+ ip_address_set (result, l6, IP6);
+}
+
+void
+get_mr_and_local_iface_ip (lisp_cp_main_t *lcm, ip_address_t * mr_ip,
+ ip_address_t * sloc)
+{
+ ip_address_t * mrit;
+
+ if (vec_len(lcm->map_resolvers) == 0)
+ {
+ clib_warning("No map-resolver configured");
+ return;
+ }
+
+ /* find the first mr ip we have a route to and the ip of the
+ * iface that has a route to it */
+ vec_foreach(mrit, lcm->map_resolvers)
+ {
+ get_first_local_ip_for_dst (lcm, mrit, sloc);
+ if (0 != sloc) {
ip_address_copy(mr_ip, mrit);
return;
- }
+ }
}
clib_warning("Can't find map-resolver and local interface ip!");
if ((ip4->ip_version_and_header_length & 0xF0) == 0x40)
{
- ip_addr_v4(src).as_u32 = ip4->src_address.as_u32;
- ip_addr_version(src) = IP4;
- ip_addr_v4(dst).as_u32 = ip4->dst_address.as_u32;
- ip_addr_version(dst) = IP4;
+ ip_address_set(src, &ip4->src_address, IP4);
+ ip_address_set(dst, &ip4->dst_address, IP4);
}
else
{
ip6 = hdr;
- clib_memcpy (&ip_addr_v6(src), &ip6->src_address, sizeof(ip6->src_address));
- ip_addr_version(src) = IP6;
- clib_memcpy (&ip_addr_v6(dst), &ip6->dst_address, sizeof(ip6->dst_address));
- ip_addr_version(dst) = IP6;
+ ip_address_set(src, &ip6->src_address, IP6);
+ ip_address_set(dst, &ip6->dst_address, IP6);
}
}
return pool_elt_at_index((lm)->if_address_pool, ia);
}
-void *
-ip_interface_get_first_ip_addres (ip_lookup_main_t *lm, u32 sw_if_index,
- u8 loop)
+int
+ip_interface_get_first_ip_addres (lisp_cp_main_t * lcm, u32 sw_if_index,
+ u8 version, ip_address_t * addr)
{
- ip_interface_address_t * ia = ip_interface_get_first_interface_address (
- lm, sw_if_index, loop);
- return ip_interface_address_get_address (lm, ia);
+ if (version == IP4)
+ {
+ ip4_address_t * l4;
+ ip_lookup_main_t * lm = &lcm->im4->lookup_main;
+ ip_interface_address_t * ia = ip_interface_get_first_interface_address (
+ lm, sw_if_index, 1 /* unnumbered */);
+
+ if (!ia)
+ return 0;
+
+ l4 = ip_interface_address_get_address (lm, ia);
+
+ if (!l4)
+ return 0;
+
+ ip_addr_v4(addr) = *l4;
+ ip_addr_version(addr) = IP4;
+ }
+ else
+ {
+ ip6_address_t * l6;
+ ip_lookup_main_t * lm = &lcm->im6->lookup_main;
+ ip_interface_address_t * ia = ip_interface_get_first_interface_address (
+ lm, sw_if_index, 1 /* unnumbered */);
+ if (!ia)
+ return 0;
+
+ l6 = ip_interface_address_get_address (lm, ia);
+ if (!l6)
+ return 0;
+
+ ip_addr_v6(addr) = *l6;
+ ip_addr_version(addr) = IP6;
+ }
+ return 1;
}
static void
pool_put(lcm->fwd_entry_pool, fe);
}
+/**
+ * Finds first remote locator with best (lowest) priority that has a local
+ * peer locator with an underlying route to it.
+ *
+ */
+static u32
+get_locator_pair (lisp_cp_main_t* lcm, mapping_t * lcl_map, mapping_t * rmt_map,
+ ip_address_t * lcl_loc, ip_address_t * rmt_loc)
+{
+ u32 i, rv, minp = ~0, limitp = 0, li, check_index = 0, done = 0, esi;
+ locator_set_t * rmt_ls, * lcl_ls;
+ ip_address_t _lcl, * lcl = &_lcl;
+ locator_t * l, * rmt = 0;
+ uword * checked = 0;
+
+ rmt_ls = pool_elt_at_index(lcm->locator_set_pool, rmt_map->locator_set_index);
+ lcl_ls = pool_elt_at_index(lcm->locator_set_pool, lcl_map->locator_set_index);
+
+ if (!rmt_ls || vec_len(rmt_ls->locator_indices) == 0)
+ return 0;
+
+ while (!done)
+ {
+ /* find unvisited remote locator with best priority */
+ for (i = 0; i < vec_len(rmt_ls->locator_indices); i++)
+ {
+ if (0 != hash_get(checked, i))
+ continue;
+
+ li = vec_elt(rmt_ls->locator_indices, i);
+ l = pool_elt_at_index(lcm->locator_pool, li);
+
+ /* we don't support non-IP locators for now */
+ if (gid_address_type(&l->address) != GID_ADDR_IP_PREFIX)
+ continue;
+
+ if (l->priority < minp && l->priority >= limitp)
+ {
+ minp = l->priority;
+ rmt = l;
+ check_index = i;
+ }
+ }
+ /* check if a local locator with a route to remote locator exists */
+ if (rmt != 0)
+ {
+ esi = get_egress_iface_for_dst (lcm, &gid_address_ip(&rmt->address));
+ if ((u32) ~0 == esi)
+ continue;
+
+ for (i = 0; i < vec_len(lcl_ls->locator_indices); i++)
+ {
+ li = vec_elt (lcl_ls->locator_indices, i);
+ locator_t * sl = pool_elt_at_index (lcm->locator_pool, li);
+
+ /* found local locator */
+ if (sl->sw_if_index == esi)
+ {
+ rv = ip_interface_get_first_ip_addres (lcm, sl->sw_if_index,
+ gid_address_ip_version(&rmt->address), lcl);
+
+ if (!rv)
+ continue;
+
+ ip_address_copy(rmt_loc, &gid_address_ip(&rmt->address));
+ ip_address_copy(lcl_loc, lcl);
+ done = 2;
+ }
+ }
+
+ /* skip this remote locator in next searches */
+ limitp = minp;
+ hash_set(checked, check_index, 1);
+ }
+ else
+ done = 1;
+ }
+ hash_free(checked);
+ return (done == 2) ? 1 : 0;
+}
+
static void
add_fwd_entry (lisp_cp_main_t* lcm, u32 src_map_index, u32 dst_map_index)
{
mapping_t * src_map, * dst_map;
- locator_set_t * dst_ls, * src_ls;
- u32 i, minp = ~0, sw_if_index;
- locator_t * dl = 0;
+ u32 sw_if_index;
uword * feip = 0, * tidp;
fwd_entry_t* fe;
vnet_lisp_gpe_add_del_fwd_entry_args_t _a, * a = &_a;
}
a->table_id = tidp[0];
- /* XXX simple forwarding policy: first lowest (value) priority locator */
- dst_ls = pool_elt_at_index (lcm->locator_set_pool,
- dst_map->locator_set_index);
- for (i = 0; i < vec_len (dst_ls->locator_indices); i++)
- {
- u32 li = vec_elt (dst_ls->locator_indices, i);
- locator_t * l = pool_elt_at_index (lcm->locator_pool, li);
- if (l->priority < minp && gid_address_type(&l->address)
- == GID_ADDR_IP_PREFIX)
- {
- minp = l->priority;
- dl = l;
- }
- }
- if (dl)
- {
- src_ls = pool_elt_at_index(lcm->locator_set_pool,
- src_map->locator_set_index);
- for (i = 0; i < vec_len(src_ls->locator_indices); i++)
- {
- u32 li = vec_elt (src_ls->locator_indices, i);
- locator_t * sl = pool_elt_at_index (lcm->locator_pool, li);
-
- if (ip_addr_version(&gid_address_ip(&dl->address)) == IP4)
- {
- ip4_address_t * l4;
- l4 = ip_interface_get_first_ip_addres (&lcm->im4->lookup_main,
- sl->sw_if_index,
- 1 /* unnumbered */);
- ip_addr_v4(&a->slocator) = *l4;
- ip_addr_version(&a->slocator) = IP4;
- }
- else
- {
- ip6_address_t * l6;
- l6 = ip_interface_get_first_ip_addres (&lcm->im6->lookup_main,
- sl->sw_if_index,
- 1 /* unnumbered */);
- ip_addr_v6(&a->slocator) = *l6;
- ip_addr_version(&a->slocator) = IP6;
- }
- }
- }
-
/* insert data plane forwarding entry */
a->is_add = 1;
- if (dl)
- a->dlocator = gid_address_ip(&dl->address);
- else
+
+ /* find best locator pair that 1) verifies LISP policy 2) are connected */
+ if (0 == get_locator_pair (lcm, src_map, dst_map, &a->slocator, &a->dlocator))
{
+ /* negative entry */
a->is_negative = 1;
a->action = dst_map->action;
}
Code Review / vpp.git / commitdiff