#include <vnet/ipsec/ipsec_io.h>
#include <vnet/ipsec/ipsec_punt.h>
#include <vnet/ipsec/ipsec_tun.h>
+#include <vnet/ipsec/ipsec.api_enum.h>
#include <vnet/ip/ip4_input.h>
-/* Statistics (not really errors) */
-#define foreach_ipsec_tun_protect_input_error \
- _(RX, "good packets received") \
- _(DISABLED, "ipsec packets received on disabled interface") \
- _(NO_TUNNEL, "no matching tunnel") \
- _(TUNNEL_MISMATCH, "SPI-tunnel mismatch") \
- _(SPI_0, "SPI 0")
-
-static char *ipsec_tun_protect_input_error_strings[] = {
-#define _(sym,string) string,
- foreach_ipsec_tun_protect_input_error
-#undef _
-};
-
-typedef enum
-{
-#define _(sym,str) IPSEC_TUN_PROTECT_INPUT_ERROR_##sym,
- foreach_ipsec_tun_protect_input_error
-#undef _
- IPSEC_TUN_PROTECT_INPUT_N_ERROR,
-} ipsec_tun_protect_input_error_t;
+typedef vl_counter_ipsec_tun_enum_t ipsec_tun_protect_input_error_t;
typedef enum ipsec_tun_next_t_
{
#define _(v, s) IPSEC_TUN_PROTECT_NEXT_##v,
foreach_ipsec_input_next
#undef _
- IPSEC_TUN_PROTECT_NEXT_DECRYPT,
- IPSEC_TUN_PROTECT_N_NEXT,
+ IPSEC_TUN_PROTECT_N_NEXT,
} ipsec_tun_next_t;
typedef struct
{
- u32 spi;
+ union
+ {
+ ipsec4_tunnel_kv_t kv4;
+ ipsec6_tunnel_kv_t kv6;
+ };
+ u8 is_ip6;
u32 seq;
} ipsec_tun_protect_input_trace_t;
ipsec_tun_protect_input_trace_t *t =
va_arg (*args, ipsec_tun_protect_input_trace_t *);
- s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
+ if (t->is_ip6)
+ s = format (s, "IPSec: %U seq %u",
+ format_ipsec6_tunnel_kv, &t->kv6, t->seq);
+ else
+ s = format (s, "IPSec: %U seq %u sa %d",
+ format_ipsec4_tunnel_kv, &t->kv4, t->seq);
return s;
}
{
if (PREDICT_FALSE (0 == esp->spi))
{
- b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_SPI_0];
+ b->error = node->errors[IPSEC_TUN_ERROR_SPI_0];
b->punt_reason = ipsec_punt_reason[(ip4->protocol == IP_PROTOCOL_UDP ?
IPSEC_PUNT_IP4_SPI_UDP_0 :
IPSEC_PUNT_IP4_NO_SUCH_TUNNEL)];
}
else
{
- b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NO_TUNNEL];
+ b->error = node->errors[IPSEC_TUN_ERROR_NO_TUNNEL];
b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP4_NO_SUCH_TUNNEL];
}
- return IPSEC_INPUT_NEXT_PUNT;
+ return VNET_DEVICE_INPUT_NEXT_PUNT;
}
always_inline u16
ipsec_ip6_if_no_tunnel (vlib_node_runtime_t * node,
vlib_buffer_t * b, const esp_header_t * esp)
{
- b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NO_TUNNEL];
+ b->error = node->errors[IPSEC_TUN_ERROR_NO_TUNNEL];
b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
- return (IPSEC_INPUT_NEXT_PUNT);
+ return VNET_DEVICE_INPUT_NEXT_PUNT;
}
always_inline uword
b = bufs;
next = nexts;
- clib_memset_u16 (nexts, im->esp4_decrypt_next_index, n_left_from);
+ clib_memset_u16 (
+ nexts, is_ip6 ? im->esp6_decrypt_next_index : im->esp4_decrypt_next_index,
+ n_left_from);
u64 n_bytes = 0, n_packets = 0;
u32 n_disabled = 0, n_no_tunnel = 0;
ipsec_tun_lkup_result_t last_result = {
.tun_index = ~0
};
- ipsec4_tunnel_key_t last_key4;
- ipsec6_tunnel_key_t last_key6;
+ ipsec4_tunnel_kv_t last_key4;
+ ipsec6_tunnel_kv_t last_key6;
+ ipsec_tun_lkup_result_t itr0;
vlib_combined_counter_main_t *rx_counter;
vlib_combined_counter_main_t *drop_counter;
- ipsec_tun_protect_t *itp0;
if (is_ip6)
clib_memset (&last_key6, 0xff, sizeof (last_key6));
else
- last_key4.as_u64 = ~0;
+ last_key4.key = ~0;
rx_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX;
drop_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP;
while (n_left_from > 0)
{
u32 sw_if_index0, len0, hdr_sz0;
- ipsec_tun_lkup_result_t itr0;
- ipsec4_tunnel_key_t key40;
- ipsec6_tunnel_key_t key60;
+ clib_bihash_kv_24_16_t bkey60;
+ clib_bihash_kv_8_16_t bkey40;
+ ipsec4_tunnel_kv_t *key40;
+ ipsec6_tunnel_kv_t *key60;
ip4_header_t *ip40;
ip6_header_t *ip60;
esp_header_t *esp0;
+ u16 buf_rewind0;
- ip40 = vlib_buffer_get_current (b[0]);
+ ip40 =
+ (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset);
+
+ key60 = (ipsec6_tunnel_kv_t *) & bkey60;
+ key40 = (ipsec4_tunnel_kv_t *) & bkey40;
if (is_ip6)
{
ip60 = (ip6_header_t *) ip40;
esp0 = (esp_header_t *) (ip60 + 1);
- hdr_sz0 = sizeof (ip6_header_t);
+ buf_rewind0 = hdr_sz0 = sizeof (ip6_header_t);
}
else
{
- /* NAT UDP port 4500 case, don't advance any more */
if (ip40->protocol == IP_PROTOCOL_UDP)
{
+ /* NAT UDP port 4500 case, don't advance any more */
esp0 =
(esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) +
sizeof (udp_header_t));
hdr_sz0 = 0;
+ buf_rewind0 = ip4_header_bytes (ip40) + sizeof (udp_header_t);
+
+ const udp_header_t *udp0 =
+ (udp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
+
+ /* length 9 = sizeof(udp_header) + 1 byte of special SPI */
+ if (clib_net_to_host_u16 (udp0->length) == 9 &&
+ esp0->spi_bytes[0] == 0xff)
+ {
+ b[0]->error = node->errors[IPSEC_TUN_ERROR_NAT_KEEPALIVE];
+
+ next[0] = VNET_DEVICE_INPUT_NEXT_IP4_DROP;
+ len0 = 0;
+
+ vlib_buffer_advance (b[0], -buf_rewind0);
+ goto trace00;
+ }
}
else
{
esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40));
- hdr_sz0 = ip4_header_bytes (ip40);
+ buf_rewind0 = hdr_sz0 = ip4_header_bytes (ip40);
}
}
vlib_buffer_advance (b[0], hdr_sz0);
len0 = vlib_buffer_length_in_chain (vm, b[0]);
+ if (len0 < sizeof (esp_header_t))
+ {
+ b[0]->error = node->errors[IPSEC_TUN_ERROR_TOO_SHORT];
+
+ next[0] = is_ip6 ? VNET_DEVICE_INPUT_NEXT_IP6_DROP :
+ VNET_DEVICE_INPUT_NEXT_IP4_DROP;
+ vlib_buffer_advance (b[0], -buf_rewind0);
+ goto trace00;
+ }
+
if (is_ip6)
{
- key60.remote_ip = ip60->src_address;
- key60.spi = esp0->spi;
+ key60->key.remote_ip = ip60->src_address;
+ key60->key.spi = esp0->spi;
+ key60->key.__pad = 0;
- if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0)
+ if (memcmp (key60, &last_key6, sizeof (last_key6)) == 0)
{
- itr0 = last_result;
+ clib_memcpy_fast (&itr0, &last_result, sizeof (itr0));
}
else
{
- uword *p = hash_get_mem (im->tun6_protect_by_key, &key60);
- if (p)
+ int rv =
+ clib_bihash_search_inline_24_16 (&im->tun6_protect_by_key,
+ &bkey60);
+ if (!rv)
{
- itr0.as_u64 = p[0];
- last_result = itr0;
- clib_memcpy_fast (&last_key6, &key60, sizeof (key60));
+ clib_memcpy_fast (&itr0, &bkey60.value, sizeof (itr0));
+ clib_memcpy_fast (&last_result, &bkey60.value,
+ sizeof (last_result));
+ clib_memcpy_fast (&last_key6, key60, sizeof (last_key6));
}
else
{
}
else
{
- key40.remote_ip = ip40->src_address.as_u32;
- key40.spi = esp0->spi;
+ ipsec4_tunnel_mk_key (key40, &ip40->src_address, esp0->spi);
- if (key40.as_u64 == last_key4.as_u64)
+ if (key40->key == last_key4.key)
{
- itr0 = last_result;
+ clib_memcpy_fast (&itr0, &last_result, sizeof (itr0));
}
else
{
- uword *p = hash_get (im->tun4_protect_by_key, key40.as_u64);
- if (p)
+ int rv =
+ clib_bihash_search_inline_8_16 (&im->tun4_protect_by_key,
+ &bkey40);
+ if (!rv)
{
- itr0.as_u64 = p[0];
- last_result = itr0;
- last_key4.as_u64 = key40.as_u64;
+ clib_memcpy_fast (&itr0, &bkey40.value, sizeof (itr0));
+ clib_memcpy_fast (&last_result, &bkey40.value,
+ sizeof (last_result));
+ last_key4.key = key40->key;
}
else
{
next[0] = ipsec_ip4_if_no_tunnel (node, b[0], esp0, ip40);
+ vlib_buffer_advance (b[0], -buf_rewind0);
n_no_tunnel++;
goto trace00;
}
}
}
- itp0 = pool_elt_at_index (ipsec_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;
- sw_if_index0 = itp0->itp_sw_if_index;
+ sw_if_index0 = itr0.sw_if_index;
vnet_buffer (b[0])->sw_if_index[VLIB_RX] = sw_if_index0;
if (PREDICT_FALSE (!vnet_sw_interface_is_admin_up (vnm, sw_if_index0)))
vlib_increment_combined_counter
(drop_counter, thread_index, sw_if_index0, 1, len0);
n_disabled++;
- b[0]->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_DISABLED];
- next[0] = IPSEC_INPUT_NEXT_DROP;
+ b[0]->error = node->errors[IPSEC_TUN_ERROR_DISABLED];
+ next[0] = is_ip6 ? VNET_DEVICE_INPUT_NEXT_IP6_DROP :
+ VNET_DEVICE_INPUT_NEXT_IP4_DROP;
goto trace00;
}
else
}
else
{
- if (n_packets && !(itp0->itp_flags & IPSEC_PROTECT_ENCAPED))
+ if (n_packets && !(itr0.flags & IPSEC_PROTECT_ENCAPED))
{
vlib_increment_combined_counter
(rx_counter, thread_index, last_sw_if_index,
n_bytes = len0;
}
- /*
- * compare the packet's outer IP headers to that of the tunnels
- */
- if (is_ip6)
- {
- if (PREDICT_FALSE
- (!ip46_address_is_equal_v6
- (&itp0->itp_crypto.dst, &ip60->src_address)
- || !ip46_address_is_equal_v6 (&itp0->itp_crypto.src,
- &ip60->dst_address)))
- {
- b[0]->error =
- node->errors
- [IPSEC_TUN_PROTECT_INPUT_ERROR_TUNNEL_MISMATCH];
- next[0] = IPSEC_INPUT_NEXT_DROP;
- goto trace00;
- }
- }
- else
+ //IPSEC_TUN_PROTECT_NEXT_DECRYPT;
+ next[0] = is_ip6 ? im->esp6_decrypt_tun_next_index :
+ im->esp4_decrypt_tun_next_index;
+
+ if (itr0.flags & IPSEC_PROTECT_FEAT)
{
- if (PREDICT_FALSE
- (!ip46_address_is_equal_v4
- (&itp0->itp_crypto.dst, &ip40->src_address)
- || !ip46_address_is_equal_v4 (&itp0->itp_crypto.src,
- &ip40->dst_address)))
- {
- b[0]->error =
- node->errors
- [IPSEC_TUN_PROTECT_INPUT_ERROR_TUNNEL_MISMATCH];
- next[0] = IPSEC_INPUT_NEXT_DROP;
- goto trace00;
- }
- }
+ u32 next32;
+ u8 arc = feature_main.device_input_feature_arc_index;
- /*
- * There are two encap possibilities
- * 1) the tunnel and ths SA are prodiving encap, i.e. it's
- * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
- * implying the SA is in tunnel mode (on a tunnel interface)
- * 2) only the tunnel provides encap
- * MAC | TUN-IP | ESP | PAYLOAD
- * implying the SA is in transport mode.
- *
- * For 2) we need only strip the tunnel encap and we're good.
- * since the tunnel and crypto ecnap (int the tun=protect
- * object) are the same and we verified above that these match
- * for 1) we need to strip the SA-IP outer headers, to
- * reveal the tunnel IP and then check that this matches
- * the configured tunnel. this we can;t do here since it
- * involves a lookup in the per-tunnel-type DB - so ship
- * the packet to the tunnel-types provided node to do that
- */
- next[0] = IPSEC_TUN_PROTECT_NEXT_DECRYPT;
+ next32 = next[0];
+ vnet_feature_arc_start (arc, sw_if_index0, &next32, b[0]);
+ next[0] = next32;
+ }
}
trace00:
if (PREDICT_FALSE (is_trace))
{
ipsec_tun_protect_input_trace_t *tr =
vlib_add_trace (vm, node, b[0], sizeof (*tr));
- tr->spi = clib_host_to_net_u32 (esp0->spi);
- tr->seq = clib_host_to_net_u32 (esp0->seq);
+ if (is_ip6)
+ clib_memcpy (&tr->kv6, &bkey60, sizeof (tr->kv6));
+ else
+ clib_memcpy (&tr->kv4, &bkey40, sizeof (tr->kv4));
+ tr->is_ip6 = is_ip6;
+ tr->seq = (len0 >= sizeof (*esp0) ?
+ clib_host_to_net_u32 (esp0->seq) : ~0);
}
}
n_left_from -= 1;
}
- if (n_packets && !(itp0->itp_flags & IPSEC_PROTECT_ENCAPED))
- {
- vlib_increment_combined_counter (rx_counter,
- thread_index,
- last_sw_if_index, n_packets, n_bytes);
- }
+ if (n_packets && !(itr0.flags & IPSEC_PROTECT_ENCAPED))
+ vlib_increment_combined_counter (rx_counter,
+ thread_index,
+ last_sw_if_index, n_packets, n_bytes);
- vlib_node_increment_counter (vm, node->node_index,
- IPSEC_TUN_PROTECT_INPUT_ERROR_RX,
- from_frame->n_vectors - (n_disabled +
- n_no_tunnel));
+ vlib_node_increment_counter (vm, node->node_index, IPSEC_TUN_ERROR_RX,
+ from_frame->n_vectors -
+ (n_disabled + n_no_tunnel));
+ vlib_node_increment_counter (vm, node->node_index, IPSEC_TUN_ERROR_NO_TUNNEL,
+ n_no_tunnel);
vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors);
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return ipsec_tun_protect_input_inline (vm, node, from_frame,
- 0 /* is_ip6 */ );
+ return ipsec_tun_protect_input_inline (vm, node, from_frame, 0);
}
/* *INDENT-OFF* */
.vector_size = sizeof (u32),
.format_trace = format_ipsec_tun_protect_input_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(ipsec_tun_protect_input_error_strings),
- .error_strings = ipsec_tun_protect_input_error_strings,
- .n_next_nodes = IPSEC_TUN_PROTECT_N_NEXT,
- .next_nodes = {
- [IPSEC_TUN_PROTECT_NEXT_DROP] = "ip4-drop",
- [IPSEC_TUN_PROTECT_NEXT_PUNT] = "punt-dispatch",
- [IPSEC_TUN_PROTECT_NEXT_DECRYPT] = "esp4-decrypt-tun",
- }
+ .n_errors = IPSEC_TUN_N_ERROR,
+ .error_counters = ipsec_tun_error_counters,
+ .sibling_of = "device-input",
};
/* *INDENT-ON* */
vlib_node_runtime_t * node,
vlib_frame_t * from_frame)
{
- return ipsec_tun_protect_input_inline (vm, node, from_frame,
- 1 /* is_ip6 */ );
+ return ipsec_tun_protect_input_inline (vm, node, from_frame, 1);
}
/* *INDENT-OFF* */
.vector_size = sizeof (u32),
.format_trace = format_ipsec_tun_protect_input_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(ipsec_tun_protect_input_error_strings),
- .error_strings = ipsec_tun_protect_input_error_strings,
- .n_next_nodes = IPSEC_TUN_PROTECT_N_NEXT,
- .next_nodes = {
- [IPSEC_TUN_PROTECT_NEXT_DROP] = "ip6-drop",
- [IPSEC_TUN_PROTECT_NEXT_PUNT] = "punt-dispatch",
- [IPSEC_TUN_PROTECT_NEXT_DECRYPT] = "esp6-decrypt-tun",
- }
+ .n_errors = IPSEC_TUN_N_ERROR,
+ .error_counters = ipsec_tun_error_counters,
+ .sibling_of = "device-input",
};
/* *INDENT-ON* */
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