#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ah.h>
-#define foreach_ah_encrypt_next \
-_(DROP, "error-drop") \
-_(IP4_LOOKUP, "ip4-lookup") \
-_(IP6_LOOKUP, "ip6-lookup") \
-_(INTERFACE_OUTPUT, "interface-output")
+#define foreach_ah_encrypt_next \
+ _ (DROP, "error-drop") \
+ _ (IP4_LOOKUP, "ip4-lookup") \
+ _ (IP6_LOOKUP, "ip6-lookup") \
+ _ (INTERFACE_OUTPUT, "interface-output")
+
#define _(v, s) AH_ENCRYPT_NEXT_##v,
typedef enum
#undef _
};
-vlib_node_registration_t ah_encrypt_node;
-
typedef struct
{
u32 spi;
return s;
}
-static uword
-ah_encrypt_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+always_inline uword
+ah_encrypt_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame,
+ int is_ip6)
{
u32 n_left_from, *from, *to_next = 0, next_index;
int icv_size = 0;
ipsec_sa_t *sa0;
ip4_and_ah_header_t *ih0, *oh0 = 0;
ip6_and_ah_header_t *ih6_0, *oh6_0 = 0;
- u8 is_ipv6;
u8 ip_hdr_size;
u8 next_hdr_type;
- u8 transport_mode = 0;
u8 tos = 0;
u8 ttl = 0;
+ u8 hop_limit = 0;
+ u32 ip_version_traffic_class_and_flow_label = 0;
i_bi0 = from[0];
from += 1;
{
clib_warning ("sequence number counter has cycled SPI %u",
sa0->spi);
- vlib_node_increment_counter (vm, ah_encrypt_node.index,
- AH_ENCRYPT_ERROR_SEQ_CYCLED, 1);
+ if (is_ip6)
+ vlib_node_increment_counter (vm, ah6_encrypt_node.index,
+ AH_ENCRYPT_ERROR_SEQ_CYCLED, 1);
+ else
+ vlib_node_increment_counter (vm, ah4_encrypt_node.index,
+ AH_ENCRYPT_ERROR_SEQ_CYCLED, 1);
//TODO need to confirm if below is needed
to_next[0] = i_bi0;
to_next += 1;
ttl = ih0->ip4.ttl;
tos = ih0->ip4.tos;
- is_ipv6 = (ih0->ip4.ip_version_and_header_length & 0xF0) == 0x60;
- /* is ipv6 */
if (PREDICT_TRUE (sa0->is_tunnel))
{
- if (PREDICT_TRUE (!is_ipv6))
- adv = -sizeof (ip4_and_ah_header_t);
- else
+ if (is_ip6)
adv = -sizeof (ip6_and_ah_header_t);
+ else
+ adv = -sizeof (ip4_and_ah_header_t);
}
else
{
icv_size =
em->ipsec_proto_main_integ_algs[sa0->integ_alg].trunc_size;
- /*transport mode save the eth header before it is overwritten */
+ const u8 padding_len = ah_calc_icv_padding_len (icv_size, is_ip6);
+ adv -= padding_len;
+ /* transport mode save the eth header before it is overwritten */
if (PREDICT_FALSE (!sa0->is_tunnel))
{
ethernet_header_t *ieh0 = (ethernet_header_t *)
vlib_buffer_advance (i_b0, adv - icv_size);
- /* is ipv6 */
- if (PREDICT_FALSE (is_ipv6))
+ if (is_ip6)
{
ih6_0 = (ip6_and_ah_header_t *) ih0;
ip_hdr_size = sizeof (ip6_header_t);
oh6_0 = vlib_buffer_get_current (i_b0);
+ hop_limit = ih6_0->ip6.hop_limit;
+ ip_version_traffic_class_and_flow_label =
+ ih6_0->ip6.ip_version_traffic_class_and_flow_label;
if (PREDICT_TRUE (sa0->is_tunnel))
{
next_hdr_type = IP_PROTOCOL_IPV6;
- oh6_0->ip6.ip_version_traffic_class_and_flow_label =
- ih6_0->ip6.ip_version_traffic_class_and_flow_label;
}
else
{
}
oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_AH;
- oh6_0->ip6.hop_limit = 254;
+ oh6_0->ip6.hop_limit = 0;
+ oh6_0->ip6.ip_version_traffic_class_and_flow_label = 0x60;
+ oh6_0->ah.reserved = 0;
+ oh6_0->ah.nexthdr = next_hdr_type;
oh6_0->ah.spi = clib_net_to_host_u32 (sa0->spi);
oh6_0->ah.seq_no = clib_net_to_host_u32 (sa0->seq);
oh6_0->ip6.payload_length =
clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, i_b0) -
sizeof (ip6_header_t));
+ oh6_0->ah.hdrlen =
+ (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
}
else
{
ip_hdr_size = sizeof (ip4_header_t);
oh0 = vlib_buffer_get_current (i_b0);
- memset (oh0, 0, sizeof (ip4_and_ah_header_t));
+ clib_memset (oh0, 0, sizeof (ip4_and_ah_header_t));
if (PREDICT_TRUE (sa0->is_tunnel))
{
oh0->ah.seq_no = clib_net_to_host_u32 (sa0->seq);
oh0->ip4.checksum = 0;
oh0->ah.nexthdr = next_hdr_type;
- oh0->ah.hdrlen = 4;
+ oh0->ah.hdrlen =
+ (sizeof (ah_header_t) + icv_size + padding_len) / 4 - 2;
}
-
- if (PREDICT_TRUE
- (!is_ipv6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
+ if (PREDICT_TRUE (!is_ip6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
{
oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
next0 = AH_ENCRYPT_NEXT_IP4_LOOKUP;
vnet_buffer (i_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
}
- else if (is_ipv6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
+ else if (is_ip6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
{
oh6_0->ip6.src_address.as_u64[0] =
sa0->tunnel_src_addr.ip6.as_u64[0];
next0 = AH_ENCRYPT_NEXT_IP6_LOOKUP;
vnet_buffer (i_b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
}
- else
- {
- transport_mode = 1;
- next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
- }
u8 sig[64];
- memset (sig, 0, sizeof (sig));
+ clib_memset (sig, 0, sizeof (sig));
u8 *digest =
- vlib_buffer_get_current (i_b0) + ip_hdr_size + icv_size;
- memset (digest, 0, icv_size);
+ vlib_buffer_get_current (i_b0) + ip_hdr_size +
+ sizeof (ah_header_t);
+ clib_memset (digest, 0, icv_size);
unsigned size = hmac_calc (sa0->integ_alg, sa0->integ_key,
sa0->integ_key_len,
sa0->seq_hi);
memcpy (digest, sig, size);
- if (PREDICT_FALSE (is_ipv6))
+ if (is_ip6)
{
+ oh6_0->ip6.hop_limit = hop_limit;
+ oh6_0->ip6.ip_version_traffic_class_and_flow_label =
+ ip_version_traffic_class_and_flow_label;
}
else
{
oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
}
- if (transport_mode)
- vlib_buffer_advance (i_b0, -sizeof (ethernet_header_t));
+ if (!sa0->is_tunnel)
+ {
+ next0 = AH_ENCRYPT_NEXT_INTERFACE_OUTPUT;
+ vlib_buffer_advance (i_b0, -sizeof (ethernet_header_t));
+ }
trace:
if (PREDICT_FALSE (i_b0->flags & VLIB_BUFFER_IS_TRACED))
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- vlib_node_increment_counter (vm, ah_encrypt_node.index,
- AH_ENCRYPT_ERROR_RX_PKTS,
- from_frame->n_vectors);
+ if (is_ip6)
+ vlib_node_increment_counter (vm, ah6_encrypt_node.index,
+ AH_ENCRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
+ else
+ vlib_node_increment_counter (vm, ah4_encrypt_node.index,
+ AH_ENCRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
return from_frame->n_vectors;
}
+static uword
+ah4_encrypt_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return ah_encrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah4_encrypt_node) = {
+ .function = ah4_encrypt_node_fn,
+ .name = "ah4-encrypt",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ah_encrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ah_encrypt_error_strings),
+ .error_strings = ah_encrypt_error_strings,
+
+ .n_next_nodes = AH_ENCRYPT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n,
+ foreach_ah_encrypt_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (ah4_encrypt_node, ah4_encrypt_node_fn);
+
+static uword
+ah6_encrypt_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return ah_encrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ );
+}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ah_encrypt_node) = {
- .function = ah_encrypt_node_fn,
- .name = "ah-encrypt",
+VLIB_REGISTER_NODE (ah6_encrypt_node) = {
+ .function = ah6_encrypt_node_fn,
+ .name = "ah6-encrypt",
.vector_size = sizeof (u32),
.format_trace = format_ah_encrypt_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
};
/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (ah_encrypt_node, ah_encrypt_node_fn)
+VLIB_NODE_FUNCTION_MULTIARCH (ah6_encrypt_node, ah6_encrypt_node_fn);
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff