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-rw-r--r--src/vnet/ipsec/esp_encrypt.c24
-rw-r--r--src/vnet/ipsec/ipsec.c42
-rw-r--r--src/vnet/ipsec/ipsec.h4
-rw-r--r--src/vnet/ipsec/ipsec_punt.h3
-rw-r--r--src/vnet/ipsec/ipsec_sa.c6
-rw-r--r--src/vnet/ipsec/ipsec_tun.c14
-rw-r--r--src/vnet/ipsec/ipsec_tun_in.c51
7 files changed, 95 insertions, 49 deletions
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index d28f4f5e425..4ed3bf72c3f 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -887,42 +887,40 @@ esp_encrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
else
l2_len = 0;
+ u16 len;
+ len = payload_len_total + hdr_len - l2_len;
+
if (VNET_LINK_IP6 == lt)
{
ip6_header_t *ip6 = (ip6_header_t *) (old_ip_hdr);
if (PREDICT_TRUE (NULL == ext_hdr))
{
*next_hdr_ptr = ip6->protocol;
- ip6->protocol = IP_PROTOCOL_IPSEC_ESP;
+ ip6->protocol =
+ (udp) ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP;
}
else
{
*next_hdr_ptr = ext_hdr->next_hdr;
- ext_hdr->next_hdr = IP_PROTOCOL_IPSEC_ESP;
+ ext_hdr->next_hdr =
+ (udp) ? IP_PROTOCOL_UDP : IP_PROTOCOL_IPSEC_ESP;
}
ip6->payload_length =
- clib_host_to_net_u16 (payload_len_total + hdr_len - l2_len -
- sizeof (ip6_header_t));
+ clib_host_to_net_u16 (len - sizeof (ip6_header_t));
}
else if (VNET_LINK_IP4 == lt)
{
- u16 len;
ip4_header_t *ip4 = (ip4_header_t *) (old_ip_hdr);
*next_hdr_ptr = ip4->protocol;
- len = payload_len_total + hdr_len - l2_len;
- if (udp)
- {
- esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1);
- udp_len = len - ip_len;
- }
- else
- esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0);
+ esp_update_ip4_hdr (ip4, len, /* is_transport */ 1,
+ (udp != NULL));
}
clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len);
if (udp)
{
+ udp_len = len - ip_len;
esp_fill_udp_hdr (sa0, udp, udp_len);
}
diff --git a/src/vnet/ipsec/ipsec.c b/src/vnet/ipsec/ipsec.c
index 3c22fbb87dd..2dd077a74a1 100644
--- a/src/vnet/ipsec/ipsec.c
+++ b/src/vnet/ipsec/ipsec.c
@@ -182,14 +182,24 @@ ipsec_add_node (vlib_main_t * vm, const char *node_name,
*out_next_index = vlib_node_add_next (vm, prev_node->index, node->index);
}
+static inline uword
+ipsec_udp_registration_key (u16 port, u8 is_ip4)
+{
+ uword key = (is_ip4) ? AF_IP4 : AF_IP6;
+
+ key |= (uword) (port << 16);
+ return key;
+}
+
void
-ipsec_unregister_udp_port (u16 port)
+ipsec_unregister_udp_port (u16 port, u8 is_ip4)
{
ipsec_main_t *im = &ipsec_main;
u32 n_regs;
- uword *p;
+ uword *p, key;
- p = hash_get (im->udp_port_registrations, port);
+ key = ipsec_udp_registration_key (port, is_ip4);
+ p = hash_get (im->udp_port_registrations, key);
ASSERT (p);
@@ -197,33 +207,35 @@ ipsec_unregister_udp_port (u16 port)
if (0 == --n_regs)
{
- udp_unregister_dst_port (vlib_get_main (), port, 1);
- hash_unset (im->udp_port_registrations, port);
+ udp_unregister_dst_port (vlib_get_main (), port, is_ip4);
+ hash_unset (im->udp_port_registrations, key);
}
else
{
- hash_unset (im->udp_port_registrations, port);
- hash_set (im->udp_port_registrations, port, n_regs);
+ hash_unset (im->udp_port_registrations, key);
+ hash_set (im->udp_port_registrations, key, n_regs);
}
}
void
-ipsec_register_udp_port (u16 port)
+ipsec_register_udp_port (u16 port, u8 is_ip4)
{
ipsec_main_t *im = &ipsec_main;
- u32 n_regs;
- uword *p;
+ u32 n_regs, node_index;
+ uword *p, key;
- p = hash_get (im->udp_port_registrations, port);
+ key = ipsec_udp_registration_key (port, is_ip4);
+ node_index =
+ (is_ip4) ? ipsec4_tun_input_node.index : ipsec6_tun_input_node.index;
+ p = hash_get (im->udp_port_registrations, key);
n_regs = (p ? p[0] : 0);
if (0 == n_regs++)
- udp_register_dst_port (vlib_get_main (), port,
- ipsec4_tun_input_node.index, 1);
+ udp_register_dst_port (vlib_get_main (), port, node_index, is_ip4);
- hash_unset (im->udp_port_registrations, port);
- hash_set (im->udp_port_registrations, port, n_regs);
+ hash_unset (im->udp_port_registrations, key);
+ hash_set (im->udp_port_registrations, key, n_regs);
}
u32
diff --git a/src/vnet/ipsec/ipsec.h b/src/vnet/ipsec/ipsec.h
index fc7b6cd2454..06bb299988b 100644
--- a/src/vnet/ipsec/ipsec.h
+++ b/src/vnet/ipsec/ipsec.h
@@ -364,8 +364,8 @@ int ipsec_select_esp_backend (ipsec_main_t * im, u32 esp_backend_idx);
clib_error_t *ipsec_rsc_in_use (ipsec_main_t * im);
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 void ipsec_register_udp_port (u16 udp_port, u8 is_ip4);
+extern void ipsec_unregister_udp_port (u16 udp_port, u8 is_ip4);
extern clib_error_t *ipsec_register_next_header (vlib_main_t *vm,
u8 next_header,
diff --git a/src/vnet/ipsec/ipsec_punt.h b/src/vnet/ipsec/ipsec_punt.h
index afed908bffb..9b9fc803391 100644
--- a/src/vnet/ipsec/ipsec_punt.h
+++ b/src/vnet/ipsec/ipsec_punt.h
@@ -20,7 +20,8 @@
#define foreach_ipsec_punt_reason \
_ (IP4_SPI_UDP_0, "ipsec4-spi-o-udp-0", IP4_PACKET) \
_ (IP4_NO_SUCH_TUNNEL, "ipsec4-no-such-tunnel", IP4_PACKET) \
- _ (IP6_NO_SUCH_TUNNEL, "ipsec6-no-such-tunnel", IP6_PACKET)
+ _ (IP6_NO_SUCH_TUNNEL, "ipsec6-no-such-tunnel", IP6_PACKET) \
+ _ (IP6_SPI_UDP_0, "ipsec6-spi-o-udp-0", IP6_PACKET)
typedef enum ipsec_punt_reason_t_
{
diff --git a/src/vnet/ipsec/ipsec_sa.c b/src/vnet/ipsec/ipsec_sa.c
index 387d8a747a3..5c80545bb21 100644
--- a/src/vnet/ipsec/ipsec_sa.c
+++ b/src/vnet/ipsec/ipsec_sa.c
@@ -325,7 +325,8 @@ ipsec_sa_add_and_lock (u32 id, u32 spi, ipsec_protocol_t proto,
sa->udp_hdr.src_port = clib_host_to_net_u16 (src_port);
if (ipsec_sa_is_set_IS_INBOUND (sa))
- ipsec_register_udp_port (clib_host_to_net_u16 (sa->udp_hdr.dst_port));
+ ipsec_register_udp_port (clib_host_to_net_u16 (sa->udp_hdr.dst_port),
+ !ipsec_sa_is_set_IS_TUNNEL_V6 (sa));
}
hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
@@ -353,7 +354,8 @@ ipsec_sa_del (ipsec_sa_t * sa)
if (ipsec_sa_is_set_IS_ASYNC (sa))
vnet_crypto_request_async_mode (0);
if (ipsec_sa_is_set_UDP_ENCAP (sa) && ipsec_sa_is_set_IS_INBOUND (sa))
- ipsec_unregister_udp_port (clib_net_to_host_u16 (sa->udp_hdr.dst_port));
+ ipsec_unregister_udp_port (clib_net_to_host_u16 (sa->udp_hdr.dst_port),
+ !ipsec_sa_is_set_IS_TUNNEL_V6 (sa));
if (ipsec_sa_is_set_IS_TUNNEL (sa) && !ipsec_sa_is_set_IS_INBOUND (sa))
dpo_reset (&sa->dpo);
diff --git a/src/vnet/ipsec/ipsec_tun.c b/src/vnet/ipsec/ipsec_tun.c
index 543be8a7faa..82f5a11d26f 100644
--- a/src/vnet/ipsec/ipsec_tun.c
+++ b/src/vnet/ipsec/ipsec_tun.c
@@ -101,14 +101,12 @@ ipsec_tun_register_nodes (ip_address_family_t af)
if (0 == ipsec_tun_node_regs[af]++)
{
if (AF_IP4 == af)
- {
- ipsec_register_udp_port (UDP_DST_PORT_ipsec);
- ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
- ipsec4_tun_input_node.index);
- }
+ ip4_register_protocol (IP_PROTOCOL_IPSEC_ESP,
+ ipsec4_tun_input_node.index);
else
ip6_register_protocol (IP_PROTOCOL_IPSEC_ESP,
ipsec6_tun_input_node.index);
+ ipsec_register_udp_port (UDP_DST_PORT_ipsec, (AF_IP4 == af));
}
}
@@ -119,12 +117,10 @@ ipsec_tun_unregister_nodes (ip_address_family_t af)
if (0 == --ipsec_tun_node_regs[af])
{
if (AF_IP4 == af)
- {
- ipsec_unregister_udp_port (UDP_DST_PORT_ipsec);
- ip4_unregister_protocol (IP_PROTOCOL_IPSEC_ESP);
- }
+ ip4_unregister_protocol (IP_PROTOCOL_IPSEC_ESP);
else
ip6_unregister_protocol (IP_PROTOCOL_IPSEC_ESP);
+ ipsec_unregister_udp_port (UDP_DST_PORT_ipsec, (AF_IP4 == af));
}
}
diff --git a/src/vnet/ipsec/ipsec_tun_in.c b/src/vnet/ipsec/ipsec_tun_in.c
index 8e97fbcc740..eec03625906 100644
--- a/src/vnet/ipsec/ipsec_tun_in.c
+++ b/src/vnet/ipsec/ipsec_tun_in.c
@@ -86,11 +86,21 @@ ipsec_ip4_if_no_tunnel (vlib_node_runtime_t * node,
}
always_inline u16
-ipsec_ip6_if_no_tunnel (vlib_node_runtime_t * node,
- vlib_buffer_t * b, const esp_header_t * esp)
+ipsec_ip6_if_no_tunnel (vlib_node_runtime_t *node, vlib_buffer_t *b,
+ const esp_header_t *esp, const ip6_header_t *ip6)
{
- b->error = node->errors[IPSEC_TUN_ERROR_NO_TUNNEL];
- b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
+ if (PREDICT_FALSE (0 == esp->spi))
+ {
+ b->error = node->errors[IPSEC_TUN_ERROR_SPI_0];
+ b->punt_reason = ipsec_punt_reason[(ip6->protocol == IP_PROTOCOL_UDP ?
+ IPSEC_PUNT_IP6_SPI_UDP_0 :
+ IPSEC_PUNT_IP6_NO_SUCH_TUNNEL)];
+ }
+ else
+ {
+ b->error = node->errors[IPSEC_TUN_ERROR_NO_TUNNEL];
+ b->punt_reason = ipsec_punt_reason[IPSEC_PUNT_IP6_NO_SUCH_TUNNEL];
+ }
return VNET_DEVICE_INPUT_NEXT_PUNT;
}
@@ -164,8 +174,35 @@ ipsec_tun_protect_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (is_ip6)
{
ip60 = (ip6_header_t *) ip40;
- esp0 = (esp_header_t *) (ip60 + 1);
- buf_rewind0 = hdr_sz0 = sizeof (ip6_header_t);
+ if (ip60->protocol == IP_PROTOCOL_UDP)
+ {
+ /* NAT UDP port 4500 case, don't advance any more */
+ esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+ hdr_sz0 = 0;
+ buf_rewind0 = sizeof (ip6_header_t) + sizeof (udp_header_t);
+
+ const udp_header_t *udp0 =
+ (udp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t));
+
+ /* 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_IP6_DROP;
+ len0 = 0;
+
+ vlib_buffer_advance (b[0], -buf_rewind0);
+ goto trace00;
+ }
+ }
+ else
+ {
+ esp0 = (esp_header_t *) (ip60 + 1);
+ buf_rewind0 = hdr_sz0 = sizeof (ip6_header_t);
+ }
}
else
{
@@ -240,7 +277,7 @@ ipsec_tun_protect_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
}
else
{
- next[0] = ipsec_ip6_if_no_tunnel (node, b[0], esp0);
+ next[0] = ipsec_ip6_if_no_tunnel (node, b[0], esp0, ip60);
n_no_tunnel++;
goto trace00;
}