_(DISABLED, "ipsec packets received on disabled interface") \
_(NO_TUNNEL, "no matching tunnel") \
_(TUNNEL_MISMATCH, "SPI-tunnel mismatch") \
+ _(NAT_KEEPALIVE, "NAT Keepalive") \
+ _(TOO_SHORT, "Too Short") \
_(SPI_0, "SPI 0")
static char *ipsec_tun_protect_input_error_strings[] = {
#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_key_t key4;
+ ipsec6_tunnel_key_t key6;
+ };
+ u8 is_ip6;
u32 seq;
+ u32 sa_index;
} ipsec_tun_protect_input_trace_t;
static u8 *
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 sa %d",
+ format_ipsec6_tunnel_key, &t->key6, t->seq, t->sa_index);
+ else
+ s = format (s, "IPSec: %U seq %u sa %d",
+ format_ipsec4_tunnel_key, &t->key4, t->seq, t->sa_index);
return s;
}
b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_SPI_0];
b->punt_reason = ipsec_punt_reason[(ip4->protocol == IP_PROTOCOL_UDP ?
IPSEC_PUNT_IP4_SPI_UDP_0 :
- IPSEC_PUNT_IP4_SPI_0)];
+ IPSEC_PUNT_IP4_NO_SUCH_TUNNEL)];
}
else
{
ipsec_ip6_if_no_tunnel (vlib_node_runtime_t * node,
vlib_buffer_t * b, const esp_header_t * esp)
{
- if (PREDICT_FALSE (0 == esp->spi))
- {
- b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NO_TUNNEL];
- b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_SPI_0];
- }
- else
- {
- b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NO_TUNNEL];
- b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
- }
+ b->error = node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NO_TUNNEL];
+ b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
+
return (IPSEC_INPUT_NEXT_PUNT);
}
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);
if (is_ip6)
{
(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);
}
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))
+ {
+ if (esp0->spi_bytes[0] == 0xff)
+ b[0]->error =
+ node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_NAT_KEEPALIVE];
+ else
+ b[0]->error =
+ node->errors[IPSEC_TUN_PROTECT_INPUT_ERROR_TOO_SHORT];
+
+ next[0] = IPSEC_INPUT_NEXT_DROP;
+ goto trace00;
+ }
+
if (is_ip6)
{
key60.remote_ip = ip60->src_address;
}
else
{
- key40.remote_ip = ip40->src_address.as_u32;
+ key40.remote_ip = ip40->src_address;
key40.spi = esp0->spi;
if (key40.as_u64 == last_key4.as_u64)
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);
+ 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;
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
- {
- 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;
- }
- }
-
- /*
- * 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;
+ next[0] = im->esp4_decrypt_tun_next_index; //IPSEC_TUN_PROTECT_NEXT_DECRYPT;
}
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->key6, &key60, sizeof (tr->key6));
+ else
+ clib_memcpy (&tr->key4, &key40, sizeof (tr->key4));
+ tr->is_ip6 = is_ip6;
+ tr->seq = (len0 >= sizeof (*esp0) ?
+ clib_host_to_net_u32 (esp0->seq) : ~0);
+ tr->sa_index = vnet_buffer (b[0])->ipsec.sad_index;
}
}
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* */
.next_nodes = {
[IPSEC_TUN_PROTECT_NEXT_DROP] = "ip4-drop",
[IPSEC_TUN_PROTECT_NEXT_PUNT] = "punt-dispatch",
- [IPSEC_TUN_PROTECT_NEXT_DECRYPT] = "esp4-decrypt-tun",
}
};
/* *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* */
.next_nodes = {
[IPSEC_TUN_PROTECT_NEXT_DROP] = "ip6-drop",
[IPSEC_TUN_PROTECT_NEXT_PUNT] = "punt-dispatch",
- [IPSEC_TUN_PROTECT_NEXT_DECRYPT] = "esp6-decrypt-tun",
}
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff