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authorNeale Ranns <nranns@cisco.com>2019-12-16 00:53:11 +0000
committerDamjan Marion <dmarion@me.com>2020-02-21 09:54:19 +0000
commit282872127bbeee6ae59ab3f885c09bad601ee0cc (patch)
tree4f1ef8243b194ca8bf6f1acd62ba4a7d688d371e /src/vnet/ipsec
parentd057625d499525625d60d2207665eaeb755e380e (diff)
ipsec: IPSec protection for multi-point tunnel interfaces
Type: feature Signed-off-by: Neale Ranns <nranns@cisco.com> Change-Id: Iaba2ab11bfaa1c8db4023434e3043ac39500f938
Diffstat (limited to 'src/vnet/ipsec')
-rw-r--r--src/vnet/ipsec/esp_encrypt.c11
-rw-r--r--src/vnet/ipsec/ipsec.api5
-rw-r--r--src/vnet/ipsec/ipsec_api.c29
-rw-r--r--src/vnet/ipsec/ipsec_cli.c12
-rw-r--r--src/vnet/ipsec/ipsec_format.c32
-rw-r--r--src/vnet/ipsec/ipsec_tun.c567
-rw-r--r--src/vnet/ipsec/ipsec_tun.h39
-rw-r--r--src/vnet/ipsec/ipsec_tun_in.c2
8 files changed, 556 insertions, 141 deletions
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index 2c4da5dafa8..7df537a5555 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -23,6 +23,7 @@
#include <vnet/crypto/crypto.h>
#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/ipsec_tun.h>
#include <vnet/ipsec/esp.h>
#define foreach_esp_encrypt_next \
@@ -319,13 +320,13 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (is_tun)
{
/* we are on a ipsec tunnel's feature arc */
- u32 next0;
+ u32 next0 = 0;
config_index = b[0]->current_config_index;
- sa_index0 = *(u32 *) vnet_feature_next_with_data (&next0, b[0],
- sizeof
- (sa_index0));
- vnet_buffer (b[0])->ipsec.sad_index = sa_index0;
+ vnet_feature_next (&next0, b[0]);
next[0] = next0;
+ vnet_buffer (b[0])->ipsec.sad_index =
+ sa_index0 = ipsec_tun_protect_get_sa_out
+ (vnet_buffer (b[0])->ip.adj_index[VLIB_TX]);
}
else
sa_index0 = vnet_buffer (b[0])->ipsec.sad_index;
diff --git a/src/vnet/ipsec/ipsec.api b/src/vnet/ipsec/ipsec.api
index 6d34d056003..b5027f60301 100644
--- a/src/vnet/ipsec/ipsec.api
+++ b/src/vnet/ipsec/ipsec.api
@@ -234,12 +234,16 @@ define ipsec_sad_entry_add_del_reply
@param client_index - opaque cookie to identify the sender
@param context - sender context, to match reply w/ request
@param sw_id_index - Tunnel interface to protect
+ @param nh - The peer/next-hop on the tunnel to which the traffic
+ should be protected. For a P2P interface set this to the
+ all 0s address.
@param sa_in - The ID [set] of inbound SAs
@param sa_out - The ID of outbound SA
*/
typedef ipsec_tunnel_protect
{
vl_api_interface_index_t sw_if_index;
+ vl_api_address_t nh;
u32 sa_out;
u8 n_sa_in;
u32 sa_in[n_sa_in];
@@ -259,6 +263,7 @@ autoreply define ipsec_tunnel_protect_del
u32 context;
vl_api_interface_index_t sw_if_index;
+ vl_api_address_t nh;
};
/**
diff --git a/src/vnet/ipsec/ipsec_api.c b/src/vnet/ipsec/ipsec_api.c
index a80c60489a4..c7ce3ef83d5 100644
--- a/src/vnet/ipsec/ipsec_api.c
+++ b/src/vnet/ipsec/ipsec_api.c
@@ -116,6 +116,7 @@ static void vl_api_ipsec_tunnel_protect_update_t_handler
vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
vl_api_ipsec_tunnel_protect_update_reply_t *rmp;
u32 sw_if_index, ii, *sa_ins = NULL;
+ ip_address_t nh;
int rv;
sw_if_index = ntohl (mp->tunnel.sw_if_index);
@@ -127,7 +128,9 @@ static void vl_api_ipsec_tunnel_protect_update_t_handler
for (ii = 0; ii < mp->tunnel.n_sa_in; ii++)
vec_add1 (sa_ins, ntohl (mp->tunnel.sa_in[ii]));
- rv = ipsec_tun_protect_update (sw_if_index,
+ ip_address_decode2 (&mp->tunnel.nh, &nh);
+
+ rv = ipsec_tun_protect_update (sw_if_index, &nh,
ntohl (mp->tunnel.sa_out), sa_ins);
#else
rv = VNET_API_ERROR_UNIMPLEMENTED;
@@ -143,15 +146,17 @@ static void vl_api_ipsec_tunnel_protect_del_t_handler
{
vlib_main_t *vm __attribute__ ((unused)) = vlib_get_main ();
vl_api_ipsec_tunnel_protect_del_reply_t *rmp;
- int rv;
+ ip_address_t nh;
u32 sw_if_index;
+ int rv;
sw_if_index = ntohl (mp->sw_if_index);
VALIDATE_SW_IF_INDEX (mp);
#if WITH_LIBSSL > 0
- rv = ipsec_tun_protect_del (sw_if_index);
+ ip_address_decode2 (&mp->nh, &nh);
+ rv = ipsec_tun_protect_del (sw_if_index, &nh);
#else
rv = VNET_API_ERROR_UNIMPLEMENTED;
#endif
@@ -177,13 +182,13 @@ send_ipsec_tunnel_protect_details (index_t itpi, void *arg)
itp = ipsec_tun_protect_get (itpi);
-
mp = vl_msg_api_alloc (sizeof (*mp) + (sizeof (u32) * itp->itp_n_sa_in));
clib_memset (mp, 0, sizeof (*mp));
mp->_vl_msg_id = ntohs (VL_API_IPSEC_TUNNEL_PROTECT_DETAILS);
mp->context = ctx->context;
mp->tun.sw_if_index = htonl (itp->itp_sw_if_index);
+ ip_address_encode2 (itp->itp_key, &mp->tun.nh);
mp->tun.sa_out = htonl (itp->itp_out_sa);
mp->tun.n_sa_in = itp->itp_n_sa_in;
@@ -224,12 +229,8 @@ vl_api_ipsec_tunnel_protect_dump_t_handler (vl_api_ipsec_tunnel_protect_dump_t
}
else
{
- index_t itpi;
-
- itpi = ipsec_tun_protect_find (sw_if_index);
-
- if (INDEX_INVALID != itpi)
- send_ipsec_tunnel_protect_details (itpi, &ctx);
+ ipsec_tun_protect_walk_itf (sw_if_index,
+ send_ipsec_tunnel_protect_details, &ctx);
}
#else
clib_warning ("unimplemented");
@@ -680,7 +681,7 @@ vl_api_ipsec_tunnel_if_add_del_t_handler (vl_api_ipsec_tunnel_if_add_del_t *
if (rv)
goto done;
- rv = ipsec_tun_protect_update_one (sw_if_index,
+ rv = ipsec_tun_protect_update_one (sw_if_index, NULL,
ipsec_tun_mk_output_sa_id
(sw_if_index),
ipsec_tun_mk_input_sa_id
@@ -711,7 +712,7 @@ vl_api_ipsec_tunnel_if_add_del_t_handler (vl_api_ipsec_tunnel_if_add_del_t *
if (NULL != t)
{
- rv = ipsec_tun_protect_del (t->sw_if_index);
+ rv = ipsec_tun_protect_del (t->sw_if_index, NULL);
ipip_del_tunnel (t->sw_if_index);
}
else
@@ -859,10 +860,10 @@ vl_api_ipsec_tunnel_if_set_sa_t_handler (vl_api_ipsec_tunnel_if_set_sa_t * mp)
VALIDATE_SW_IF_INDEX(mp);
if (mp->is_outbound)
- rv = ipsec_tun_protect_update_out (ntohl (mp->sw_if_index),
+ rv = ipsec_tun_protect_update_out (ntohl (mp->sw_if_index), NULL,
ntohl (mp->sa_id));
else
- rv = ipsec_tun_protect_update_in (ntohl (mp->sw_if_index),
+ rv = ipsec_tun_protect_update_in (ntohl (mp->sw_if_index), NULL,
ntohl (mp->sa_id));
#else
diff --git a/src/vnet/ipsec/ipsec_cli.c b/src/vnet/ipsec/ipsec_cli.c
index b054155a45e..1ab8bd99db3 100644
--- a/src/vnet/ipsec/ipsec_cli.c
+++ b/src/vnet/ipsec/ipsec_cli.c
@@ -391,7 +391,7 @@ ipsec_spd_bindings_show_all (vlib_main_t * vm, ipsec_main_t * im)
static walk_rc_t
ipsec_tun_protect_show_one (index_t itpi, void *ctx)
{
- vlib_cli_output (ctx, "%U", format_ipsec_tun_protect, itpi);
+ vlib_cli_output (ctx, "%U", format_ipsec_tun_protect_index, itpi);
return (WALK_CONTINUE);
}
@@ -728,6 +728,7 @@ create_ipsec_tunnel_command_fn (vlib_main_t * vm,
unformat_input_t _line_input, *line_input = &_line_input;
ip46_address_t local_ip = ip46_address_initializer;
ip46_address_t remote_ip = ip46_address_initializer;
+ ip_address_t nh = IP_ADDRESS_V4_ALL_0S;
ipsec_crypto_alg_t crypto_alg;
ipsec_integ_alg_t integ_alg;
ipsec_sa_flags_t flags;
@@ -808,6 +809,8 @@ create_ipsec_tunnel_command_fn (vlib_main_t * vm,
;
else if (unformat (line_input, "del"))
is_add = 0;
+ else if (unformat (line_input, "nh &U", unformat_ip_address, &nh))
+ ;
else
{
error = clib_error_return (0, "unknown input `%U'",
@@ -858,7 +861,7 @@ create_ipsec_tunnel_command_fn (vlib_main_t * vm,
clib_host_to_net_u32 (salt), &remote_ip,
&local_ip, NULL);
rv |=
- ipsec_tun_protect_update_one (sw_if_index,
+ ipsec_tun_protect_update_one (sw_if_index, &nh,
ipsec_tun_mk_local_sa_id (sw_if_index),
ipsec_tun_mk_remote_sa_id
(sw_if_index));
@@ -902,6 +905,7 @@ ipsec_tun_protect_cmd (vlib_main_t * vm,
{
unformat_input_t _line_input, *line_input = &_line_input;
u32 sw_if_index, is_del, sa_in, sa_out, *sa_ins = NULL;
+ ip_address_t peer = { };
vnet_main_t *vnm;
is_del = 0;
@@ -924,13 +928,15 @@ ipsec_tun_protect_cmd (vlib_main_t * vm,
else if (unformat (line_input, "%U",
unformat_vnet_sw_interface, vnm, &sw_if_index))
;
+ else if (unformat (line_input, "%U", unformat_ip_address, &peer))
+ ;
else
return (clib_error_return (0, "unknown input '%U'",
format_unformat_error, line_input));
}
if (!is_del)
- ipsec_tun_protect_update (sw_if_index, sa_out, sa_ins);
+ ipsec_tun_protect_update (sw_if_index, &peer, sa_out, sa_ins);
unformat_free (line_input);
return NULL;
diff --git a/src/vnet/ipsec/ipsec_format.c b/src/vnet/ipsec/ipsec_format.c
index 8b9d8c40be1..bf398cb2105 100644
--- a/src/vnet/ipsec/ipsec_format.c
+++ b/src/vnet/ipsec/ipsec_format.c
@@ -337,26 +337,33 @@ done:
}
u8 *
-format_ipsec_tun_protect (u8 * s, va_list * args)
+format_ipsec_tun_protect_index (u8 * s, va_list * args)
{
- u32 itpi = va_arg (*args, u32);
+ u32 itpi = va_arg (*args, index_t);
ipsec_tun_protect_t *itp;
- u32 sai;
- if (pool_is_free_index (ipsec_protect_pool, itpi))
- {
- s = format (s, "No such tunnel index: %d", itpi);
- goto done;
- }
+ if (pool_is_free_index (ipsec_tun_protect_pool, itpi))
+ return (format (s, "No such tunnel index: %d", itpi));
+
+ itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi);
+
+ return (format (s, "%U", format_ipsec_tun_protect, itp));
+}
- itp = pool_elt_at_index (ipsec_protect_pool, itpi);
+
+u8 *
+format_ipsec_tun_protect (u8 * s, va_list * args)
+{
+ ipsec_tun_protect_t *itp = va_arg (*args, ipsec_tun_protect_t *);
+ u32 sai;
s = format (s, "%U", format_vnet_sw_if_index_name,
vnet_get_main (), itp->itp_sw_if_index);
+ if (!ip_address_is_zero (itp->itp_key))
+ s = format (s, ": %U", format_ip_address, itp->itp_key);
s = format (s, "\n output-sa:");
- s =
- format (s, "\n %U", format_ipsec_sa, itp->itp_out_sa,
- IPSEC_FORMAT_BRIEF);
+ s = format (s, "\n %U", format_ipsec_sa, itp->itp_out_sa,
+ IPSEC_FORMAT_BRIEF);
s = format (s, "\n input-sa:");
/* *INDENT-OFF* */
@@ -366,7 +373,6 @@ format_ipsec_tun_protect (u8 * s, va_list * args)
}));
/* *INDENT-ON* */
-done:
return (s);
}
diff --git a/src/vnet/ipsec/ipsec_tun.c b/src/vnet/ipsec/ipsec_tun.c
index f6b09d65f2c..769229721f6 100644
--- a/src/vnet/ipsec/ipsec_tun.c
+++ b/src/vnet/ipsec/ipsec_tun.c
@@ -18,29 +18,92 @@
#include <vnet/ipsec/ipsec_tun.h>
#include <vnet/ipsec/esp.h>
#include <vnet/udp/udp.h>
+#include <vnet/adj/adj_delegate.h>
+#include <vnet/teib/teib.h>
+
+/**
+ * The logger
+ */
+vlib_log_class_t ipsec_tun_protect_logger;
/**
* Pool of tunnel protection objects
*/
-ipsec_tun_protect_t *ipsec_protect_pool;
+ipsec_tun_protect_t *ipsec_tun_protect_pool;
+
+/**
+ * Adj delegate registered type
+ */
+static adj_delegate_type_t ipsec_tun_adj_delegate_type;
+
+/**
+ * Adj index to TX SA mapping
+ */
+index_t *ipsec_tun_protect_sa_by_adj_index;
+
+const ip_address_t IP_ADDR_ALL_0 = IP_ADDRESS_V4_ALL_0S;
/**
- * DB of protected tunnels
+ * The DB of all added per-nh tunnel protectiond
*/
-typedef struct ipsec_protect_db_t_
+typedef struct ipsec_tun_protect_itf_db_t_
+{
+ /** A hash table key'd on IP (4 or 6) address */
+ uword *id_hash;
+ /** If the interface is P2P then there is only one protect
+ * object associated with the auto-adj for each NH proto */
+ index_t id_itp;
+} ipsec_tun_protect_itf_db_t;
+
+typedef struct ipsec_tun_protect_db_t_
{
- u32 *tunnels;
- u32 count;
-} ipsec_protect_db_t;
+ /** Per-interface vector */
+ ipsec_tun_protect_itf_db_t *id_itf;
+} ipsec_tun_protect_db_t;
+
+static ipsec_tun_protect_db_t itp_db;
+
+const static ipsec_tun_protect_itf_db_t IPSEC_TUN_PROTECT_DEFAULT_DB_ENTRY = {
+ .id_itp = INDEX_INVALID,
+};
+
+#define ITP_DBG(_itp, _fmt, _args...) \
+{ \
+ vlib_log_debug(ipsec_tun_protect_logger, \
+ "[%U]: " _fmt, \
+ format_ipsec_tun_protect, \
+ _itp, ##_args); \
+}
-static ipsec_protect_db_t ipsec_protect_db;
+#define ITP_DBG2(_fmt, _args...) \
+{ \
+ vlib_log_debug(ipsec_tun_protect_logger, \
+ _fmt, ##_args); \
+}
static void
-ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable)
+ipsec_tun_protect_add_adj (adj_index_t ai, index_t sai)
{
- u32 sai;
+ vec_validate_init_empty (ipsec_tun_protect_sa_by_adj_index, ai,
+ INDEX_INVALID);
+
+ ipsec_tun_protect_sa_by_adj_index[ai] = sai;
+}
+
+static inline const ipsec_tun_protect_t *
+ipsec_tun_protect_from_const_base (const adj_delegate_t * ad)
+{
+ if (ad == NULL)
+ return (NULL);
+ return (pool_elt_at_index (ipsec_tun_protect_pool, ad->ad_index));
+}
- sai = itp->itp_out_sa;
+static void
+ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable)
+{
+ ITP_DBG2 ("%s on %U", (enable ? "enable" : "disable"),
+ format_vnet_sw_if_index_name, vnet_get_main (),
+ itp->itp_sw_if_index);
if (itp->itp_flags & IPSEC_PROTECT_L2)
{
@@ -49,16 +112,16 @@ ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable)
(ip46_address_is_ip4 (&itp->itp_tun.src) ?
"esp4-encrypt-tun" :
"esp6-encrypt-tun"),
- itp->itp_sw_if_index, enable,
- &sai, sizeof (sai));
+ itp->itp_sw_if_index, enable, NULL, 0);
}
else
{
+ u32 fi4, fi6, sai;
ipsec_main_t *im;
ipsec_sa_t *sa;
- u32 fi4, fi6;
im = &ipsec_main;
+ sai = itp->itp_out_sa;
sa = ipsec_sa_get (sai);
if (sa->crypto_alg == IPSEC_CRYPTO_ALG_NONE &&
@@ -85,26 +148,52 @@ ipsec_tun_protect_feature_set (ipsec_tun_protect_t * itp, u8 enable)
vnet_feature_enable_disable_with_index
(vnet_get_feature_arc_index ("ip4-output"),
- fi4, itp->itp_sw_if_index, enable, &sai, sizeof (sai));
+ fi4, itp->itp_sw_if_index, enable, NULL, 0);
vnet_feature_enable_disable_with_index
(vnet_get_feature_arc_index ("ip6-output"),
- fi6, itp->itp_sw_if_index, enable, &sai, sizeof (sai));
+ fi6, itp->itp_sw_if_index, enable, NULL, 0);
+ }
+}
+
+static index_t
+ipsec_tun_protect_find (u32 sw_if_index, const ip_address_t * nh)
+{
+ ipsec_tun_protect_itf_db_t *idi;
+ uword *p;
+
+ if (vec_len (itp_db.id_itf) <= sw_if_index)
+ return INDEX_INVALID;
+
+ if (vnet_sw_interface_is_p2p (vnet_get_main (), sw_if_index))
+ return (itp_db.id_itf[sw_if_index].id_itp);
+
+ idi = &itp_db.id_itf[sw_if_index];
+ p = hash_get_mem (idi->id_hash, nh);
+
+ if (NULL == p)
+ {
+ return INDEX_INVALID;
}
+ return (p[0]);
}
static void
-ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp)
+ipsec_tun_protect_rx_db_add (ipsec_main_t * im,
+ const ipsec_tun_protect_t * itp)
{
const ipsec_sa_t *sa;
u32 sai;
+ if (ip46_address_is_zero (&itp->itp_crypto.dst))
+ return;
+
/* *INDENT-OFF* */
FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai,
({
sa = ipsec_sa_get (sai);
ipsec_tun_lkup_result_t res = {
- .tun_index = itp - ipsec_protect_pool,
+ .tun_index = itp - ipsec_tun_protect_pool,
.sa_index = sai,
};
@@ -120,9 +209,13 @@ ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp)
};
hash_set (im->tun4_protect_by_key, key.as_u64, res.as_u64);
if (1 == hash_elts(im->tun4_protect_by_key))
- udp_register_dst_port (vlib_get_main(),
- UDP_DST_PORT_ipsec,
- ipsec4_tun_input_node.index, 1);
+ {
+ udp_register_dst_port (vlib_get_main(),
+ UDP_DST_PORT_ipsec,
+ ipsec4_tun_input_node.index, 1);
+ ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
+ ipsec4_tun_input_node.index);
+ }
}
else
{
@@ -131,14 +224,83 @@ ipsec_tun_protect_db_add (ipsec_main_t * im, const ipsec_tun_protect_t * itp)
.spi = clib_host_to_net_u32 (sa->spi),
};
hash_set_mem_alloc (&im->tun6_protect_by_key, &key, res.as_u64);
+
+ if (1 == hash_elts (im->tun6_protect_by_key))
+ ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
+ ipsec6_tun_input_node.index);
}
}))
/* *INDENT-ON* */
}
+static adj_walk_rc_t
+ipsec_tun_protect_adj_add (adj_index_t ai, void *arg)
+{
+ ipsec_tun_protect_t *itp = arg;
+ adj_delegate_add (adj_get (ai), ipsec_tun_adj_delegate_type,
+ itp - ipsec_tun_protect_pool);
+ ipsec_tun_protect_add_adj (ai, itp->itp_out_sa);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
static void
-ipsec_tun_protect_db_remove (ipsec_main_t * im,
- const ipsec_tun_protect_t * itp)
+ipsec_tun_protect_tx_db_add (ipsec_tun_protect_t * itp)
+{
+ /*
+ * add the delegate to the adj
+ */
+ ipsec_tun_protect_itf_db_t *idi;
+ fib_protocol_t nh_proto;
+ ip46_address_t nh;
+
+ vec_validate_init_empty (itp_db.id_itf,
+ itp->itp_sw_if_index,
+ IPSEC_TUN_PROTECT_DEFAULT_DB_ENTRY);
+
+ idi = &itp_db.id_itf[itp->itp_sw_if_index];
+
+ if (vnet_sw_interface_is_p2p (vnet_get_main (), itp->itp_sw_if_index))
+ {
+ if (INDEX_INVALID == idi->id_itp)
+ {
+ ipsec_tun_protect_feature_set (itp, 1);
+ }
+ idi->id_itp = itp - ipsec_tun_protect_pool;
+
+ FOR_EACH_FIB_IP_PROTOCOL (nh_proto)
+ adj_nbr_walk (itp->itp_sw_if_index,
+ nh_proto, ipsec_tun_protect_adj_add, itp);
+ }
+ else
+ {
+ if (NULL == idi->id_hash)
+ {
+ idi->id_hash =
+ hash_create_mem (0, sizeof (ip_address_t), sizeof (uword));
+ /*
+ * enable the encrypt feature for egress if this is the first addition
+ * on this interface
+ */
+ ipsec_tun_protect_feature_set (itp, 1);
+ }
+
+ hash_set_mem (idi->id_hash, itp->itp_key, itp - ipsec_tun_protect_pool);
+
+ /*
+ * walk all the adjs with the same nh on this interface
+ * to associate them with this protection
+ */
+ nh_proto = ip_address_to_46 (itp->itp_key, &nh);
+
+ adj_nbr_walk_nh (itp->itp_sw_if_index,
+ nh_proto, &nh, ipsec_tun_protect_adj_add, itp);
+ }
+}
+
+static void
+ipsec_tun_protect_rx_db_remove (ipsec_main_t * im,
+ const ipsec_tun_protect_t * itp)
{
const ipsec_sa_t *sa;
@@ -169,26 +331,56 @@ ipsec_tun_protect_db_remove (ipsec_main_t * im,
/* *INDENT-ON* */
}
+static adj_walk_rc_t
+ipsec_tun_protect_adj_remove (adj_index_t ai, void *arg)
+{
+ adj_delegate_remove (ai, ipsec_tun_adj_delegate_type);
+ ipsec_tun_protect_add_adj (ai, INDEX_INVALID);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
static void
-ipsec_tun_protect_config (ipsec_main_t * im,
- ipsec_tun_protect_t * itp, u32 sa_out, u32 * sas_in)
+ipsec_tun_protect_tx_db_remove (ipsec_tun_protect_t * itp)
{
- ipsec_sa_t *sa;
- index_t sai;
- u32 ii;
+ ipsec_tun_protect_itf_db_t *idi;
+ fib_protocol_t nh_proto;
+ ip46_address_t nh;
- itp->itp_n_sa_in = vec_len (sas_in);
- for (ii = 0; ii < itp->itp_n_sa_in; ii++)
- itp->itp_in_sas[ii] = sas_in[ii];
- itp->itp_out_sa = sa_out;
+ nh_proto = ip_address_to_46 (itp->itp_key, &nh);
+ idi = &itp_db.id_itf[itp->itp_sw_if_index];
- ipsec_sa_lock (itp->itp_out_sa);
+ if (vnet_sw_interface_is_p2p (vnet_get_main (), itp->itp_sw_if_index))
+ {
+ ipsec_tun_protect_feature_set (itp, 0);
+ idi->id_itp = INDEX_INVALID;
+
+ FOR_EACH_FIB_IP_PROTOCOL (nh_proto)
+ adj_nbr_walk (itp->itp_sw_if_index,
+ nh_proto, ipsec_tun_protect_adj_remove, itp);
+ }
+ else
+ {
+ adj_nbr_walk_nh (itp->itp_sw_if_index,
+ nh_proto, &nh, ipsec_tun_protect_adj_remove, itp);
+
+ hash_unset_mem (idi->id_hash, itp->itp_key);
+
+ if (0 == hash_elts (idi->id_hash))
+ {
+ ipsec_tun_protect_feature_set (itp, 0);
+ hash_free (idi->id_hash);
+ idi->id_hash = NULL;
+ }
+ }
+}
+
+static void
+ipsec_tun_protect_set_crypto_addr (ipsec_tun_protect_t * itp)
+{
+ ipsec_sa_t *sa;
/* *INDENT-OFF* */
- FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai,
- ({
- ipsec_sa_lock(sai);
- }));
FOR_EACH_IPSEC_PROTECT_INPUT_SA(itp, sa,
({
if (ipsec_sa_is_set_IS_TUNNEL (sa))
@@ -206,16 +398,37 @@ ipsec_tun_protect_config (ipsec_main_t * im,
}
}));
/* *INDENT-ON* */
+}
+
+static void
+ipsec_tun_protect_config (ipsec_main_t * im,
+ ipsec_tun_protect_t * itp, u32 sa_out, u32 * sas_in)
+{
+ index_t sai;
+ u32 ii;
+
+ itp->itp_n_sa_in = vec_len (sas_in);
+ for (ii = 0; ii < itp->itp_n_sa_in; ii++)
+ itp->itp_in_sas[ii] = sas_in[ii];
+ itp->itp_out_sa = sa_out;
+
+ ipsec_sa_lock (itp->itp_out_sa);
+
+ /* *INDENT-OFF* */
+ FOR_EACH_IPSEC_PROTECT_INPUT_SAI(itp, sai,
+ ({
+ ipsec_sa_lock(sai);
+ }));
+ ipsec_tun_protect_set_crypto_addr(itp);
+ /* *INDENT-ON* */
/*
* add to the DB against each SA
*/
- ipsec_tun_protect_db_add (im, itp);
+ ipsec_tun_protect_rx_db_add (im, itp);
+ ipsec_tun_protect_tx_db_add (itp);
- /*
- * enable the encrypt feature for egress.
- */
- ipsec_tun_protect_feature_set (itp, 1);
+ ITP_DBG (itp, "configured");
}
static void
@@ -224,15 +437,14 @@ ipsec_tun_protect_unconfig (ipsec_main_t * im, ipsec_tun_protect_t * itp)
ipsec_sa_t *sa;
index_t sai;
- ipsec_tun_protect_feature_set (itp, 0);
-
/* *INDENT-OFF* */
FOR_EACH_IPSEC_PROTECT_INPUT_SA(itp, sa,
({
ipsec_sa_unset_IS_PROTECT (sa);
}));
- ipsec_tun_protect_db_remove (im, itp);
+ ipsec_tun_protect_rx_db_remove (im, itp);
+ ipsec_tun_protect_tx_db_remove (itp);
ipsec_sa_unlock(itp->itp_out_sa);
@@ -241,31 +453,25 @@ ipsec_tun_protect_unconfig (ipsec_main_t * im, ipsec_tun_protect_t * itp)
ipsec_sa_unlock(sai);
}));
/* *INDENT-ON* */
-}
-
-index_t
-ipsec_tun_protect_find (u32 sw_if_index)
-{
- if (vec_len (ipsec_protect_db.tunnels) < sw_if_index)
- return (INDEX_INVALID);
-
- return (ipsec_protect_db.tunnels[sw_if_index]);
+ ITP_DBG (itp, "unconfigured");
}
int
-ipsec_tun_protect_update_one (u32 sw_if_index, u32 sa_out, u32 sa_in)
+ipsec_tun_protect_update_one (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_out, u32 sa_in)
{
u32 *sas_in = NULL;
int rv;
vec_add1 (sas_in, sa_in);
- rv = ipsec_tun_protect_update (sw_if_index, sa_out, sas_in);
+ rv = ipsec_tun_protect_update (sw_if_index, nh, sa_out, sas_in);
return (rv);
}
int
-ipsec_tun_protect_update_out (u32 sw_if_index, u32 sa_out)
+ipsec_tun_protect_update_out (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_out)
{
u32 itpi, *sas_in, sai, *saip;
ipsec_tun_protect_t *itp;
@@ -275,24 +481,22 @@ ipsec_tun_protect_update_out (u32 sw_if_index, u32 sa_out)
sas_in = NULL;
rv = 0;
im = &ipsec_main;
- vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index,
- INDEX_INVALID);
- itpi = ipsec_protect_db.tunnels[sw_if_index];
+
+ itpi = ipsec_tun_protect_find (sw_if_index, nh);
if (INDEX_INVALID == itpi)
{
return (VNET_API_ERROR_INVALID_INTERFACE);
}
- itp = pool_elt_at_index (ipsec_protect_pool, itpi);
+ itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi);
- /* *INDENT-0FF* */
- FOR_EACH_IPSEC_PROTECT_INPUT_SAI (itp, sai, (
- {
- ipsec_sa_lock (sai);
- vec_add1 (sas_in, sai);
- }
- ));
+ /* *INDENT-OFF* */
+ FOR_EACH_IPSEC_PROTECT_INPUT_SAI (itp, sai,
+ ({
+ ipsec_sa_lock (sai);
+ vec_add1 (sas_in, sai);
+ }));
/* *INDENT-ON* */
sa_out = ipsec_sa_find_and_lock (sa_out);
@@ -315,7 +519,8 @@ out:
}
int
-ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in)
+ipsec_tun_protect_update_in (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_in)
{
u32 itpi, *sas_in, sa_out;
ipsec_tun_protect_t *itp;
@@ -325,9 +530,7 @@ ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in)
sas_in = NULL;
rv = 0;
im = &ipsec_main;
- vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index,
- INDEX_INVALID);
- itpi = ipsec_protect_db.tunnels[sw_if_index];
+ itpi = ipsec_tun_protect_find (sw_if_index, nh);
if (INDEX_INVALID == itpi)
{
@@ -343,7 +546,7 @@ ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in)
}
vec_add1 (sas_in, sa_in);
- itp = pool_elt_at_index (ipsec_protect_pool, itpi);
+ itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi);
sa_out = itp->itp_out_sa;
ipsec_sa_lock (sa_out);
@@ -358,19 +561,40 @@ out:
return (rv);
}
+static void
+ipsec_tun_protect_update_from_teib (ipsec_tun_protect_t * itp,
+ const teib_entry_t * ne)
+{
+ if (NULL != ne)
+ {
+ const fib_prefix_t *pfx;
+
+ pfx = teib_entry_get_nh (ne);
+
+ ip46_address_copy (&itp->itp_tun.dst, &pfx->fp_addr);
+ }
+ else
+ ip46_address_reset (&itp->itp_tun.dst);
+}
+
int
-ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in)
+ipsec_tun_protect_update (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_out, u32 * sas_in)
{
ipsec_tun_protect_t *itp;
u32 itpi, ii, *saip;
ipsec_main_t *im;
int rv;
+ ITP_DBG2 ("update: %U/%U",
+ format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index,
+ format_ip_address, nh);
+
rv = 0;
im = &ipsec_main;
- vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index,
- INDEX_INVALID);
- itpi = ipsec_protect_db.tunnels[sw_if_index];
+ if (NULL == nh)
+ nh = &IP_ADDR_ALL_0;
+ itpi = ipsec_tun_protect_find (sw_if_index, nh);
vec_foreach_index (ii, sas_in)
{
@@ -407,17 +631,18 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in)
goto out;
}
- pool_get_zero (ipsec_protect_pool, itp);
+ pool_get_zero (ipsec_tun_protect_pool, itp);
itp->itp_sw_if_index = sw_if_index;
- ipsec_protect_db.tunnels[sw_if_index] = itp - ipsec_protect_pool;
- ipsec_protect_db.count++;
itp->itp_n_sa_in = vec_len (sas_in);
for (ii = 0; ii < itp->itp_n_sa_in; ii++)
itp->itp_in_sas[ii] = sas_in[ii];
itp->itp_out_sa = sa_out;
+ itp->itp_key = clib_mem_alloc (sizeof (*itp->itp_key));
+ ip_address_copy (itp->itp_key, nh);
+
rv = dev_class->ip_tun_desc (sw_if_index,
&itp->itp_tun.src,
&itp->itp_tun.dst, &is_l2);
@@ -425,6 +650,18 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in)
if (rv)
goto out;
+ if (ip46_address_is_zero (&itp->itp_tun.dst))
+ {
+ /* tunnel has no destination address, presumably because it's p2mp
+ in which case we use the nh that this is protection for */
+ ip46_address_t peer;
+
+ ip_address_to_46 (nh, &peer);
+
+ ipsec_tun_protect_update_from_teib
+ (itp, teib_entry_find (sw_if_index, &peer));
+ }
+
if (is_l2)
itp->itp_flags |= IPSEC_PROTECT_L2;
@@ -451,18 +688,11 @@ ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out, u32 * sas_in)
* of the tunnel we are protecting, else it's dropped.
*/
ipsec_tun_protect_config (im, itp, sa_out, sas_in);
-
- if (1 == hash_elts (im->tun4_protect_by_key))
- ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
- ipsec4_tun_input_node.index);
- if (1 == hash_elts (im->tun6_protect_by_key))
- ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
- ipsec6_tun_input_node.index);
}
else
{
/* updating SAs only */
- itp = pool_elt_at_index (ipsec_protect_pool, itpi);
+ itp = pool_elt_at_index (ipsec_tun_protect_pool, itpi);
ipsec_tun_protect_unconfig (im, itp);
ipsec_tun_protect_config (im, itp, sa_out, sas_in);
@@ -477,17 +707,21 @@ out:
}
int
-ipsec_tun_protect_del (u32 sw_if_index)
+ipsec_tun_protect_del (u32 sw_if_index, const ip_address_t * nh)
{
ipsec_tun_protect_t *itp;
ipsec_main_t *im;
index_t itpi;
+ ITP_DBG2 ("delete: %U/%U",
+ format_vnet_sw_if_index_name, vnet_get_main (), sw_if_index,
+ format_ip_address, nh);
+
im = &ipsec_main;
+ if (NULL == nh)
+ nh = &IP_ADDR_ALL_0;
- vec_validate_init_empty (ipsec_protect_db.tunnels, sw_if_index,
- INDEX_INVALID);
- itpi = ipsec_protect_db.tunnels[sw_if_index];
+ itpi = ipsec_tun_protect_find (sw_if_index, nh);
if (INDEX_INVALID == itpi)
return (VNET_API_ERROR_NO_SUCH_ENTRY);
@@ -495,9 +729,8 @@ ipsec_tun_protect_del (u32 sw_if_index)
itp = ipsec_tun_protect_get (itpi);
ipsec_tun_protect_unconfig (im, itp);
- ipsec_protect_db.tunnels[itp->itp_sw_if_index] = INDEX_INVALID;
-
- pool_put (ipsec_protect_pool, itp);
+ clib_mem_free (itp->itp_key);
+ pool_put (ipsec_tun_protect_pool, itp);
if (0 == hash_elts (im->tun4_protect_by_key))
ip4_unregister_protocol (IP_PROTOCOL_IPSEC_ESP);
@@ -513,13 +746,150 @@ ipsec_tun_protect_walk (ipsec_tun_protect_walk_cb_t fn, void *ctx)
index_t itpi;
/* *INDENT-OFF* */
- pool_foreach_index(itpi, ipsec_protect_pool,
+ pool_foreach_index(itpi, ipsec_tun_protect_pool,
+ ({
+ fn (itpi, ctx);
+ }));
+ /* *INDENT-ON* */
+}
+
+void
+ipsec_tun_protect_walk_itf (u32 sw_if_index,
+ ipsec_tun_protect_walk_cb_t fn, void *ctx)
+{
+ ipsec_tun_protect_itf_db_t *idi;
+ ip_address_t *key;
+ index_t itpi;
+
+ if (vec_len (itp_db.id_itf) <= sw_if_index)
+ return;
+
+ idi = &itp_db.id_itf[sw_if_index];
+
+ /* *INDENT-OFF* */
+ hash_foreach(key, itpi, idi->id_hash,
({
fn (itpi, ctx);
}));
/* *INDENT-ON* */
+ if (INDEX_INVALID != idi->id_itp)
+ fn (idi->id_itp, ctx);
}
+static void
+ipsec_tun_protect_adj_delegate_adj_deleted (adj_delegate_t * ad)
+{
+ /* remove our delegate */
+ adj_delegate_remove (ad->ad_adj_index, ipsec_tun_adj_delegate_type);
+ ipsec_tun_protect_add_adj (ad->ad_adj_index, INDEX_INVALID);
+}
+
+static void
+ipsec_tun_protect_adj_delegate_adj_created (adj_index_t ai)
+{
+ /* add our delegate if there is protection for this neighbour */
+ ip_address_t ip = IP_ADDRESS_V4_ALL_0S;
+ ip_adjacency_t *adj;
+ index_t itpi;
+
+ adj = adj_get (ai);
+
+ if (adj->lookup_next_index != IP_LOOKUP_NEXT_MIDCHAIN)
+ return;
+
+ ip_address_from_46 (&adj->sub_type.midchain.next_hop,
+ adj->ia_nh_proto, &ip);
+
+ itpi = ipsec_tun_protect_find (adj->rewrite_header.sw_if_index, &ip);
+
+ if (INDEX_INVALID != itpi)
+ {
+ const ipsec_tun_protect_t *itp;
+
+ itp = ipsec_tun_protect_get (itpi);
+ adj_delegate_add (adj_get (ai), ipsec_tun_adj_delegate_type, itpi);
+ ipsec_tun_protect_add_adj (ai, itp->itp_out_sa);
+ }
+}
+
+static u8 *
+ipsec_tun_protect_adj_delegate_format (const adj_delegate_t * aed, u8 * s)
+{
+ const ipsec_tun_protect_t *itp;
+
+ itp = ipsec_tun_protect_from_const_base (aed);
+ s = format (s, "ipsec-tun-protect:\n%U", format_ipsec_tun_protect, itp);
+
+ return (s);
+}
+
+static void
+ipsec_tun_teib_entry_added (const teib_entry_t * ne)
+{
+ const ip46_address_t *peer46;
+ ipsec_tun_protect_t *itp;
+ ip_address_t peer;
+ index_t itpi;
+
+ peer46 = teib_entry_get_peer (ne);
+ ip_address_from_46 (peer46,
+ (ip46_address_is_ip4 (peer46) ?
+ FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), &peer);
+
+ itpi = ipsec_tun_protect_find (teib_entry_get_sw_if_index (ne), &peer);
+
+ if (INDEX_INVALID == itpi)
+ return;
+
+ itp = ipsec_tun_protect_get (itpi);
+ ipsec_tun_protect_rx_db_remove (&ipsec_main, itp);
+ ipsec_tun_protect_update_from_teib (itp, ne);
+ ipsec_tun_protect_set_crypto_addr (itp);
+ ipsec_tun_protect_rx_db_add (&ipsec_main, itp);
+
+ ITP_DBG (itp, "teib-added");
+}
+
+static void
+ipsec_tun_teib_entry_deleted (const teib_entry_t * ne)
+{
+ const ip46_address_t *peer46;
+ ipsec_tun_protect_t *itp;
+ ip_address_t peer;
+ index_t itpi;
+
+ peer46 = teib_entry_get_peer (ne);
+ ip_address_from_46 (peer46,
+ (ip46_address_is_ip4 (peer46) ?
+ FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6), &peer);
+
+ itpi = ipsec_tun_protect_find (teib_entry_get_sw_if_index (ne), &peer);
+
+ if (INDEX_INVALID == itpi)
+ return;
+
+ itp = ipsec_tun_protect_get (itpi);
+ ipsec_tun_protect_rx_db_remove (&ipsec_main, itp);
+ ipsec_tun_protect_update_from_teib (itp, NULL);
+ ipsec_tun_protect_set_crypto_addr (itp);
+
+ ITP_DBG (itp, "teib-removed");
+}
+
+/**
+ * VFT registered with the adjacency delegate
+ */
+const static adj_delegate_vft_t ipsec_tun_adj_delegate_vft = {
+ .adv_adj_deleted = ipsec_tun_protect_adj_delegate_adj_deleted,
+ .adv_adj_created = ipsec_tun_protect_adj_delegate_adj_created,
+ .adv_format = ipsec_tun_protect_adj_delegate_format,
+};
+
+const static teib_vft_t ipsec_tun_teib_vft = {
+ .nv_added = ipsec_tun_teib_entry_added,
+ .nv_deleted = ipsec_tun_teib_entry_deleted,
+};
+
clib_error_t *
ipsec_tunnel_protect_init (vlib_main_t * vm)
{
@@ -537,6 +907,13 @@ ipsec_tunnel_protect_init (vlib_main_t * vm)
ipsec_add_feature ("ip6-output", "esp6-no-crypto",
&im->esp6_no_crypto_tun_feature_index);
+ ipsec_tun_adj_delegate_type =
+ adj_delegate_register_new_type (&ipsec_tun_adj_delegate_vft);
+
+ ipsec_tun_protect_logger = vlib_log_register_class ("ipsec", "tun");
+
+ teib_register (&ipsec_tun_teib_vft);
+
return 0;
}
diff --git a/src/vnet/ipsec/ipsec_tun.h b/src/vnet/ipsec/ipsec_tun.h
index 840840335a5..56d3de14704 100644
--- a/src/vnet/ipsec/ipsec_tun.h
+++ b/src/vnet/ipsec/ipsec_tun.h
@@ -77,6 +77,8 @@ typedef struct ipsec_tun_protect_t_
ipsec_ep_t itp_tun;
+ ip_address_t *itp_key;
+
} ipsec_tun_protect_t;
#define FOR_EACH_IPSEC_PROTECT_INPUT_SAI(_itp, _sai, body) \
@@ -96,21 +98,28 @@ typedef struct ipsec_tun_protect_t_
} \
}
-extern int ipsec_tun_protect_update_one (u32 sw_if_index, u32 sa_out,
- u32 sa_in);
-extern int ipsec_tun_protect_update (u32 sw_if_index, u32 sa_out,
- u32 * sa_ins);
-extern int ipsec_tun_protect_update_in (u32 sw_if_index, u32 sa_in);
-extern int ipsec_tun_protect_update_out (u32 sw_if_index, u32 sa_out);
+extern int ipsec_tun_protect_update_one (u32 sw_if_index,
+ const ip_address_t * nh,
+ u32 sa_out, u32 sa_in);
+extern int ipsec_tun_protect_update (u32 sw_if_index,
+ const ip_address_t * nh,
+ u32 sa_out, u32 * sa_ins);
+extern int ipsec_tun_protect_update_in (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_in);
+extern int ipsec_tun_protect_update_out (u32 sw_if_index,
+ const ip_address_t * nh, u32 sa_out);
-extern int ipsec_tun_protect_del (u32 sw_if_index);
+extern int ipsec_tun_protect_del (u32 sw_if_index, const ip_address_t * nh);
typedef walk_rc_t (*ipsec_tun_protect_walk_cb_t) (index_t itpi, void *arg);
extern void ipsec_tun_protect_walk (ipsec_tun_protect_walk_cb_t fn,
void *cttx);
-extern index_t ipsec_tun_protect_find (u32 sw_if_index);
+extern void ipsec_tun_protect_walk_itf (u32 sw_if_index,
+ ipsec_tun_protect_walk_cb_t fn,
+ void *cttx);
extern u8 *format_ipsec_tun_protect (u8 * s, va_list * args);
+extern u8 *format_ipsec_tun_protect_index (u8 * s, va_list * args);
// FIXME
extern vlib_node_registration_t ipsec4_tun_input_node;
@@ -119,7 +128,7 @@ extern vlib_node_registration_t ipsec6_tun_input_node;
/*
* DP API
*/
-extern ipsec_tun_protect_t *ipsec_protect_pool;
+extern ipsec_tun_protect_t *ipsec_tun_protect_pool;
typedef struct ipsec_tun_lkup_result_t_
{
@@ -137,7 +146,17 @@ typedef struct ipsec_tun_lkup_result_t_
always_inline ipsec_tun_protect_t *
ipsec_tun_protect_get (u32 index)
{
- return (pool_elt_at_index (ipsec_protect_pool, index));
+ return (pool_elt_at_index (ipsec_tun_protect_pool, index));
+}
+
+extern index_t *ipsec_tun_protect_sa_by_adj_index;
+always_inline index_t
+ipsec_tun_protect_get_sa_out (adj_index_t ai)
+{
+ ASSERT (vec_len (ipsec_tun_protect_sa_by_adj_index) > ai);
+ ASSERT (INDEX_INVALID != ipsec_tun_protect_sa_by_adj_index[ai]);
+
+ return (ipsec_tun_protect_sa_by_adj_index[ai]);
}
/*
diff --git a/src/vnet/ipsec/ipsec_tun_in.c b/src/vnet/ipsec/ipsec_tun_in.c
index 35d268f58bc..501ab027634 100644
--- a/src/vnet/ipsec/ipsec_tun_in.c
+++ b/src/vnet/ipsec/ipsec_tun_in.c
@@ -273,7 +273,7 @@ ipsec_tun_protect_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
}
}
- itp0 = pool_elt_at_index (ipsec_protect_pool, itr0.tun_index);
+ itp0 = pool_elt_at_index (ipsec_tun_protect_pool, itr0.tun_index);
vnet_buffer (b[0])->ipsec.sad_index = itr0.sa_index;
vnet_buffer (b[0])->ipsec.protect_index = itr0.tun_index;