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authorFilip Tehlar <ftehlar@cisco.com>2017-05-30 07:14:46 +0200
committerFlorin Coras <fcoras@cisco.com>2017-06-08 11:05:35 -0700
commitef2a5bf0a31c9c0a94f9f497cb6353f46073e6ec (patch)
tree6ff449ec8a07d33ad210c147fc3f6d4e19e17a38 /src/vnet/lisp-cp/control.c
parent5e8527603fed5e43a8d632857c063c5fdf36d317 (diff)
LISP: add NSH support
Change-Id: I971c110ed126f1a24a963f9d3b88cf8f8c308816 Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Diffstat (limited to 'src/vnet/lisp-cp/control.c')
-rw-r--r--src/vnet/lisp-cp/control.c139
1 files changed, 127 insertions, 12 deletions
diff --git a/src/vnet/lisp-cp/control.c b/src/vnet/lisp-cp/control.c
index 19bbd618cbc..db78678d9c6 100644
--- a/src/vnet/lisp-cp/control.c
+++ b/src/vnet/lisp-cp/control.c
@@ -28,6 +28,8 @@
#include <openssl/evp.h>
#include <openssl/hmac.h>
+#define MAX_VALUE_U24 0xffffff
+
lisp_cp_main_t lisp_control_main;
u8 *format_lisp_cp_input_trace (u8 * s, va_list * args);
@@ -697,6 +699,20 @@ vnet_lisp_map_cache_add_del (vnet_lisp_add_del_mapping_args_t * a,
mapping_t *m, *old_map;
u32 **eid_indexes;
+ if (gid_address_type (&a->eid) == GID_ADDR_NSH)
+ {
+ if (gid_address_vni (&a->eid) != 0)
+ {
+ clib_warning ("Supported only default VNI for NSH!");
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+ }
+ if (gid_address_nsh_spi (&a->eid) > MAX_VALUE_U24)
+ {
+ clib_warning ("SPI is greater than 24bit!");
+ return VNET_API_ERROR_INVALID_ARGUMENT;
+ }
+ }
+
mi = gid_dictionary_lookup (&lcm->mapping_index_by_gid, &a->eid);
old_map = mi != ~0 ? pool_elt_at_index (lcm->mapping_pool, mi) : 0;
if (a->is_add)
@@ -812,7 +828,7 @@ vnet_lisp_add_del_local_mapping (vnet_lisp_add_del_mapping_args_t * a,
else if (GID_ADDR_MAC == type)
dp_table = hash_get (lcm->bd_id_by_vni, vni);
- if (!dp_table)
+ if (!dp_table && GID_ADDR_NSH != type)
{
clib_warning ("vni %d not associated to a %s!", vni,
GID_ADDR_IP_PREFIX == type ? "vrf" : "bd");
@@ -1329,8 +1345,23 @@ vnet_lisp_add_del_adjacency (vnet_lisp_add_del_adjacency_args_t * a)
{
/* check if source eid has an associated mapping. If pitr mode is on,
* just use the pitr's mapping */
- local_mi = lcm->lisp_pitr ? lcm->pitr_map_index :
- gid_dictionary_lookup (&lcm->mapping_index_by_gid, &a->leid);
+ if (lcm->lisp_pitr)
+ local_mi = lcm->pitr_map_index;
+ else
+ {
+ if (gid_address_type (&a->reid) == GID_ADDR_NSH)
+ {
+ if (lcm->nsh_map_index == ~0)
+ local_mi = GID_LOOKUP_MISS;
+ else
+ local_mi = lcm->nsh_map_index;
+ }
+ else
+ {
+ local_mi = gid_dictionary_lookup (&lcm->mapping_index_by_gid,
+ &a->leid);
+ }
+ }
if (GID_LOOKUP_MISS == local_mi)
{
@@ -1371,6 +1402,57 @@ vnet_lisp_set_map_request_mode (u8 mode)
}
int
+vnet_lisp_nsh_set_locator_set (u8 * locator_set_name, u8 is_add)
+{
+ lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
+ lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
+ u32 locator_set_index = ~0;
+ mapping_t *m;
+ uword *p;
+
+ if (vnet_lisp_enable_disable_status () == 0)
+ {
+ clib_warning ("LISP is disabled!");
+ return VNET_API_ERROR_LISP_DISABLED;
+ }
+
+ if (is_add)
+ {
+ if (lcm->nsh_map_index == (u32) ~ 0)
+ {
+ p = hash_get_mem (lcm->locator_set_index_by_name, locator_set_name);
+ if (!p)
+ {
+ clib_warning ("locator-set %v doesn't exist", locator_set_name);
+ return -1;
+ }
+ locator_set_index = p[0];
+
+ pool_get (lcm->mapping_pool, m);
+ memset (m, 0, sizeof *m);
+ m->locator_set_index = locator_set_index;
+ m->local = 1;
+ m->nsh_set = 1;
+ lcm->nsh_map_index = m - lcm->mapping_pool;
+
+ if (~0 == vnet_lisp_gpe_add_nsh_iface (lgm))
+ return -1;
+ }
+ }
+ else
+ {
+ if (lcm->nsh_map_index != (u32) ~ 0)
+ {
+ /* remove NSH mapping */
+ pool_put_index (lcm->mapping_pool, lcm->nsh_map_index);
+ lcm->nsh_map_index = ~0;
+ vnet_lisp_gpe_del_nsh_iface (lgm);
+ }
+ }
+ return 0;
+}
+
+int
vnet_lisp_pitr_set_locator_set (u8 * locator_set_name, u8 is_add)
{
lisp_cp_main_t *lcm = vnet_lisp_cp_get_main ();
@@ -2667,7 +2749,7 @@ _send_encapsulated_map_request (lisp_cp_main_t * lcm,
}
/* get locator-set for seid */
- if (!lcm->lisp_pitr)
+ if (!lcm->lisp_pitr && gid_address_type (deid) != GID_ADDR_NSH)
{
map_index = gid_dictionary_lookup (&lcm->mapping_index_by_gid, seid);
if (map_index == ~0)
@@ -2690,9 +2772,24 @@ _send_encapsulated_map_request (lisp_cp_main_t * lcm,
}
else
{
- map_index = lcm->pitr_map_index;
- map = pool_elt_at_index (lcm->mapping_pool, lcm->pitr_map_index);
- ls_index = map->locator_set_index;
+ if (lcm->lisp_pitr)
+ {
+ map = pool_elt_at_index (lcm->mapping_pool, lcm->pitr_map_index);
+ ls_index = map->locator_set_index;
+ }
+ else
+ {
+ if (lcm->nsh_map_index == (u32) ~ 0)
+ {
+ clib_warning ("No locator-set defined for NSH!");
+ return -1;
+ }
+ else
+ {
+ map = pool_elt_at_index (lcm->mapping_pool, lcm->nsh_map_index);
+ ls_index = map->locator_set_index;
+ }
+ }
}
/* overwrite locator set if map-request itr-rlocs configured */
@@ -2843,6 +2940,7 @@ get_src_and_dst_eids_from_buffer (lisp_cp_main_t * lcm, vlib_buffer_t * b,
gid_address_t * src, gid_address_t * dst,
u16 type)
{
+ ethernet_header_t *eh;
u32 vni = 0;
memset (src, 0, sizeof (*src));
@@ -2873,7 +2971,6 @@ get_src_and_dst_eids_from_buffer (lisp_cp_main_t * lcm, vlib_buffer_t * b,
}
else if (LISP_AFI_MAC == type)
{
- ethernet_header_t *eh;
ethernet_arp_header_t *ah;
eh = vlib_buffer_get_current (b);
@@ -2906,8 +3003,19 @@ get_src_and_dst_eids_from_buffer (lisp_cp_main_t * lcm, vlib_buffer_t * b,
}
else if (LISP_AFI_LCAF == type)
{
- /* Eventually extend this to support NSH and other */
- ASSERT (0);
+ lisp_nsh_hdr_t *nh;
+ eh = vlib_buffer_get_current (b);
+
+ if (clib_net_to_host_u16 (eh->type) == ETHERNET_TYPE_NSH)
+ {
+ nh = (lisp_nsh_hdr_t *) (((u8 *) eh) + sizeof (*eh));
+ u32 spi = clib_net_to_host_u32 (nh->spi_si << 8);
+ u8 si = (u8) clib_net_to_host_u32 (nh->spi_si);
+ gid_address_nsh_spi (dst) = spi;
+ gid_address_nsh_si (dst) = si;
+
+ gid_address_type (dst) = GID_ADDR_NSH;
+ }
}
}
@@ -3009,8 +3117,14 @@ lisp_cp_lookup_inline (vlib_main_t * vm,
}
else
{
- si = gid_dictionary_lookup (&lcm->mapping_index_by_gid,
- &src);
+ if (GID_ADDR_NSH != gid_address_type (&dst))
+ {
+ si = gid_dictionary_lookup (&lcm->mapping_index_by_gid,
+ &src);
+ }
+ else
+ si = lcm->nsh_map_index;
+
if (~0 != si)
{
dp_add_fwd_entry_from_mt (si, di);
@@ -3862,6 +3976,7 @@ lisp_cp_init (vlib_main_t * vm)
u64 now = clib_cpu_time_now ();
timing_wheel_init (&lcm->wheel, now, vm->clib_time.clocks_per_second);
+ lcm->nsh_map_index = ~0;
return 0;
}