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-rw-r--r--src/vnet/ipsec/esp_decrypt.c80
-rw-r--r--src/vnet/ipsec/ipsec.c49
-rw-r--r--src/vnet/ipsec/ipsec.h7
3 files changed, 100 insertions, 36 deletions
diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c
index 905b13aa81c..21159fba84b 100644
--- a/src/vnet/ipsec/esp_decrypt.c
+++ b/src/vnet/ipsec/esp_decrypt.c
@@ -14,7 +14,6 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-
#include <vnet/vnet.h>
#include <vnet/api_errno.h>
#include <vnet/ip/ip.h>
@@ -749,6 +748,7 @@ out:
static_always_inline void
esp_decrypt_post_crypto (vlib_main_t *vm, const vlib_node_runtime_t *node,
+ const u16 *next_by_next_header,
const esp_decrypt_packet_data_t *pd,
const esp_decrypt_packet_data2_t *pd2,
vlib_buffer_t *b, u16 *next, int is_ip6, int is_tun,
@@ -920,44 +920,49 @@ esp_decrypt_post_crypto (vlib_main_t *vm, const vlib_node_runtime_t *node,
b->current_length = pd->current_length - adv;
esp_remove_tail (vm, b, lb, tail);
}
- else
+ else if (is_tun && next_header == IP_PROTOCOL_GRE)
{
- if (is_tun && next_header == IP_PROTOCOL_GRE)
- {
- gre_header_t *gre;
+ gre_header_t *gre;
- b->current_data = pd->current_data + adv;
- b->current_length = pd->current_length - adv - tail;
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv - tail;
- gre = vlib_buffer_get_current (b);
+ gre = vlib_buffer_get_current (b);
- vlib_buffer_advance (b, sizeof (*gre));
+ vlib_buffer_advance (b, sizeof (*gre));
- switch (clib_net_to_host_u16 (gre->protocol))
- {
- case GRE_PROTOCOL_teb:
- vnet_update_l2_len (b);
- next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
- break;
- case GRE_PROTOCOL_ip4:
- next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
- break;
- case GRE_PROTOCOL_ip6:
- next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
- break;
- default:
- b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
- next[0] = ESP_DECRYPT_NEXT_DROP;
- break;
- }
- }
- else
+ switch (clib_net_to_host_u16 (gre->protocol))
{
- next[0] = ESP_DECRYPT_NEXT_DROP;
+ case GRE_PROTOCOL_teb:
+ vnet_update_l2_len (b);
+ next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
+ break;
+ case GRE_PROTOCOL_ip4:
+ next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
+ break;
+ case GRE_PROTOCOL_ip6:
+ next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
+ break;
+ default:
b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
- return;
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ break;
}
}
+ else if ((next[0] = vec_elt (next_by_next_header, next_header)) !=
+ (u16) ~0)
+ {
+ b->current_data = pd->current_data + adv;
+ b->current_length = pd->current_length - adv;
+ esp_remove_tail (vm, b, lb, tail);
+ }
+ else
+ {
+ next[0] = ESP_DECRYPT_NEXT_DROP;
+ b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
+ return;
+ }
+
if (is_tun)
{
if (ipsec_sa_is_set_IS_PROTECT (sa0))
@@ -1028,6 +1033,7 @@ esp_decrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
u16 async_next_node)
{
ipsec_main_t *im = &ipsec_main;
+ const u16 *next_by_next_header = im->next_header_registrations;
u32 thread_index = vm->thread_index;
u16 len;
ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
@@ -1307,8 +1313,8 @@ esp_decrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
if (sync_next[0] >= ESP_DECRYPT_N_NEXT)
- esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], sync_next, is_ip6,
- is_tun, 0);
+ esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, pd2, b[0],
+ sync_next, is_ip6, is_tun, 0);
/* trace: */
if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
@@ -1349,6 +1355,8 @@ esp_decrypt_post_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame, int is_ip6, int is_tun)
{
+ const ipsec_main_t *im = &ipsec_main;
+ const u16 *next_by_next_header = im->next_header_registrations;
u32 *from = vlib_frame_vector_args (from_frame);
u32 n_left = from_frame->n_vectors;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
@@ -1366,13 +1374,13 @@ esp_decrypt_post_inline (vlib_main_t * vm,
}
if (!pd->is_chain)
- esp_decrypt_post_crypto (vm, node, pd, 0, b[0], next, is_ip6, is_tun,
- 1);
+ esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, 0, b[0],
+ next, is_ip6, is_tun, 1);
else
{
esp_decrypt_packet_data2_t *pd2 = esp_post_data2 (b[0]);
- esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
- is_tun, 1);
+ esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, pd2,
+ b[0], next, is_ip6, is_tun, 1);
}
/*trace: */
diff --git a/src/vnet/ipsec/ipsec.c b/src/vnet/ipsec/ipsec.c
index 2749b04587b..62ab23976a8 100644
--- a/src/vnet/ipsec/ipsec.c
+++ b/src/vnet/ipsec/ipsec.c
@@ -39,6 +39,52 @@ ipsec_main_t ipsec_main;
esp_async_post_next_t esp_encrypt_async_next;
esp_async_post_next_t esp_decrypt_async_next;
+clib_error_t *
+ipsec_register_next_header (vlib_main_t *vm, u8 next_header,
+ const char *next_node)
+{
+ ipsec_main_t *im = &ipsec_main;
+ const vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) next_node);
+ /* -post nodes (eg. esp4-decrypt-post) are siblings of non-post nodes (eg.
+ * esp4-decrypt) and will therefore have the same next index */
+ const vlib_node_t *esp_decrypt_nodes[] = {
+ vlib_get_node (vm, im->esp4_decrypt_node_index),
+ vlib_get_node (vm, im->esp6_decrypt_node_index),
+ vlib_get_node (vm, im->esp4_decrypt_tun_node_index),
+ vlib_get_node (vm, im->esp6_decrypt_tun_node_index),
+ };
+ uword slot, max;
+ int i;
+
+ /* looks for a next_index value that we can use for all esp decrypt nodes to
+ * avoid maintaining different next index arrays... */
+
+ slot = vlib_node_get_next (vm, esp_decrypt_nodes[0]->index, node->index);
+ max = vec_len (esp_decrypt_nodes[0]->next_nodes);
+ for (i = 1; i < ARRAY_LEN (esp_decrypt_nodes); i++)
+ {
+ /* if next node already exists, check it shares the same next_index */
+ if (slot !=
+ vlib_node_get_next (vm, esp_decrypt_nodes[i]->index, node->index))
+ return clib_error_return (
+ 0, "next node already exists with different next index");
+ /* compute a suitable slot from the max of all nodes next index */
+ max = clib_max (max, vec_len (esp_decrypt_nodes[i]->next_nodes));
+ }
+
+ if (~0 == slot)
+ {
+ /* next node not there yet, add it using the computed max */
+ slot = max;
+ for (i = 0; i < ARRAY_LEN (esp_decrypt_nodes); i++)
+ vlib_node_add_next_with_slot (vm, esp_decrypt_nodes[i]->index,
+ node->index, slot);
+ }
+
+ im->next_header_registrations[next_header] = slot;
+ return 0;
+}
+
static clib_error_t *
ipsec_check_ah_support (ipsec_sa_t * sa)
{
@@ -570,6 +616,9 @@ ipsec_init (vlib_main_t * vm)
im->input_epoch_count = 0;
im->ipsec4_in_spd_hash_num_buckets = IPSEC4_SPD_DEFAULT_HASH_NUM_BUCKETS;
+ vec_validate_init_empty_aligned (im->next_header_registrations, 255, ~0,
+ CLIB_CACHE_LINE_BYTES);
+
return 0;
}
diff --git a/src/vnet/ipsec/ipsec.h b/src/vnet/ipsec/ipsec.h
index 05d8484a28c..58b0ffc93f9 100644
--- a/src/vnet/ipsec/ipsec.h
+++ b/src/vnet/ipsec/ipsec.h
@@ -149,6 +149,9 @@ typedef struct
uword *tunnel_index_by_key;
+ /* next_header protocol registration */
+ u16 *next_header_registrations;
+
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
@@ -358,6 +361,10 @@ void ipsec_set_async_mode (u32 is_enabled);
extern void ipsec_register_udp_port (u16 udp_port);
extern void ipsec_unregister_udp_port (u16 udp_port);
+extern clib_error_t *ipsec_register_next_header (vlib_main_t *vm,
+ u8 next_header,
+ const char *next_node);
+
#endif /* __IPSEC_H__ */
/*