#include <vnet/ipsec/esp.h>
#include <vnet/ipsec/ah.h>
-#define foreach_ah_decrypt_next \
-_(DROP, "error-drop") \
-_(IP4_INPUT, "ip4-input") \
-_(IP6_INPUT, "ip6-input") \
-_(IPSEC_GRE_INPUT, "ipsec-gre-input")
+#define foreach_ah_decrypt_next \
+ _ (DROP, "error-drop") \
+ _ (IP4_INPUT, "ip4-input") \
+ _ (IP6_INPUT, "ip6-input") \
+ _ (IPSEC_GRE_INPUT, "ipsec-gre-input")
#define _(v, s) AH_DECRYPT_NEXT_##v,
typedef enum
AH_DECRYPT_N_NEXT,
} ah_decrypt_next_t;
-
-#define foreach_ah_decrypt_error \
- _(RX_PKTS, "AH pkts received") \
- _(DECRYPTION_FAILED, "AH decryption failed") \
- _(INTEG_ERROR, "Integrity check failed") \
- _(REPLAY, "SA replayed packet") \
- _(NOT_IP, "Not IP packet (dropped)")
-
+#define foreach_ah_decrypt_error \
+ _ (RX_PKTS, "AH pkts received") \
+ _ (DECRYPTION_FAILED, "AH decryption failed") \
+ _ (INTEG_ERROR, "Integrity check failed") \
+ _ (REPLAY, "SA replayed packet")
typedef enum
{
return s;
}
-static uword
-ah_decrypt_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+always_inline uword
+ah_decrypt_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame,
+ int is_ip6)
{
u32 n_left_from, *from, next_index, *to_next;
ipsec_main_t *im = &ipsec_main;
u32 seq;
ip4_header_t *ih4 = 0, *oh4 = 0;
ip6_header_t *ih6 = 0, *oh6 = 0;
- u8 tunnel_mode = 1;
- u8 transport_ip6 = 0;
u8 ip_hdr_size = 0;
u8 tos = 0;
u8 ttl = 0;
sa_index0 = vnet_buffer (i_b0)->ipsec.sad_index;
sa0 = pool_elt_at_index (im->sad, sa_index0);
- if ((ih4->ip_version_and_header_length & 0xF0) == 0x40)
- {
- ip_hdr_size = ip4_header_bytes (ih4);
- ah0 = (ah_header_t *) ((u8 *) ih4 + ip_hdr_size);
- }
- else if ((ih4->ip_version_and_header_length & 0xF0) == 0x60)
+ if (is_ip6)
{
ip6_ext_header_t *prev = NULL;
ip6_ext_header_find_t (ih6, prev, ah0, IP_PROTOCOL_IPSEC_AH);
}
else
{
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_NOT_IP, 1);
- goto trace;
+ ip_hdr_size = ip4_header_bytes (ih4);
+ ah0 = (ah_header_t *) ((u8 *) ih4 + ip_hdr_size);
}
seq = clib_host_to_net_u32 (ah0->seq_no);
if (PREDICT_FALSE (rv))
{
clib_warning ("anti-replay SPI %u seq %u", sa0->spi, seq);
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_REPLAY, 1);
+ if (is_ip6)
+ vlib_node_increment_counter (vm,
+ ah6_decrypt_node.index,
+ AH_DECRYPT_ERROR_REPLAY, 1);
+ else
+ vlib_node_increment_counter (vm,
+ ah6_decrypt_node.index,
+ AH_DECRYPT_ERROR_REPLAY, 1);
to_next[0] = i_bi0;
to_next += 1;
goto trace;
memcpy (digest, icv, icv_size);
memset (icv, 0, icv_size);
- if ((ih4->ip_version_and_header_length & 0xF0) == 0x40)
- {
- tos = ih4->tos;
- ttl = ih4->ttl;
- ih4->tos = 0;
- ih4->ttl = 0;
- ih4->checksum = 0;
- ih4->flags_and_fragment_offset = 0;
- icv_padding_len =
- ah_calc_icv_padding_len (icv_size, 0 /* is_ipv6 */ );
- }
- else
+ if (is_ip6)
{
ip_version_traffic_class_and_flow_label =
ih6->ip_version_traffic_class_and_flow_label;
icv_padding_len =
ah_calc_icv_padding_len (icv_size, 1 /* is_ipv6 */ );
}
+ else
+ {
+ tos = ih4->tos;
+ ttl = ih4->ttl;
+ ih4->tos = 0;
+ ih4->ttl = 0;
+ ih4->checksum = 0;
+ ih4->flags_and_fragment_offset = 0;
+ icv_padding_len =
+ ah_calc_icv_padding_len (icv_size, 0 /* is_ipv6 */ );
+ }
hmac_calc (sa0->integ_alg, sa0->integ_key, sa0->integ_key_len,
(u8 *) ih4, i_b0->current_length, sig, sa0->use_esn,
sa0->seq_hi);
if (PREDICT_FALSE (memcmp (digest, sig, icv_size)))
{
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_INTEG_ERROR,
- 1);
+ if (is_ip6)
+ vlib_node_increment_counter (vm,
+ ah6_decrypt_node.index,
+ AH_DECRYPT_ERROR_INTEG_ERROR,
+ 1);
+ else
+ vlib_node_increment_counter (vm,
+ ah4_decrypt_node.index,
+ AH_DECRYPT_ERROR_INTEG_ERROR,
+ 1);
to_next[0] = i_bi0;
to_next += 1;
goto trace;
icv_padding_len);
i_b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
- /* transport mode */
- if (PREDICT_FALSE (!sa0->is_tunnel && !sa0->is_tunnel_ip6))
- {
- tunnel_mode = 0;
-
- if (PREDICT_TRUE
- ((ih4->ip_version_and_header_length & 0xF0) != 0x40))
- {
- if (PREDICT_TRUE
- ((ih4->ip_version_and_header_length & 0xF0) == 0x60))
- transport_ip6 = 1;
- else
- {
- clib_warning ("next header: 0x%x", ah0->nexthdr);
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_NOT_IP,
- 1);
- goto trace;
- }
- }
- }
-
- if (PREDICT_TRUE (tunnel_mode))
- {
+ if (PREDICT_TRUE (sa0->is_tunnel))
+ { /* tunnel mode */
if (PREDICT_TRUE (ah0->nexthdr == IP_PROTOCOL_IP_IN_IP))
next0 = AH_DECRYPT_NEXT_IP4_INPUT;
else if (ah0->nexthdr == IP_PROTOCOL_IPV6)
else
{
clib_warning ("next header: 0x%x", ah0->nexthdr);
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_DECRYPTION_FAILED,
- 1);
+ if (is_ip6)
+ vlib_node_increment_counter (vm,
+ ah6_decrypt_node.index,
+ AH_DECRYPT_ERROR_DECRYPTION_FAILED,
+ 1);
+ else
+ vlib_node_increment_counter (vm,
+ ah4_decrypt_node.index,
+ AH_DECRYPT_ERROR_DECRYPTION_FAILED,
+ 1);
goto trace;
}
}
- /* transport mode */
else
- {
- if (PREDICT_FALSE (transport_ip6))
+ { /* transport mode */
+ if (is_ip6)
{
vlib_buffer_advance (i_b0, -sizeof (ip6_header_t));
oh6 = vlib_buffer_get_current (i_b0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- vlib_node_increment_counter (vm, ah_decrypt_node.index,
- AH_DECRYPT_ERROR_RX_PKTS,
- from_frame->n_vectors);
+ if (is_ip6)
+ vlib_node_increment_counter (vm, ah6_decrypt_node.index,
+ AH_DECRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
+ else
+ vlib_node_increment_counter (vm, ah4_decrypt_node.index,
+ AH_DECRYPT_ERROR_RX_PKTS,
+ from_frame->n_vectors);
return from_frame->n_vectors;
}
+static uword
+ah4_decrypt_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return ah_decrypt_inline (vm, node, from_frame, 0 /* is_ip6 */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ah4_decrypt_node) = {
+ .function = ah4_decrypt_node_fn,
+ .name = "ah4-decrypt",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ah_decrypt_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ah_decrypt_error_strings),
+ .error_strings = ah_decrypt_error_strings,
+
+ .n_next_nodes = AH_DECRYPT_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [AH_DECRYPT_NEXT_##s] = n,
+ foreach_ah_decrypt_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (ah4_decrypt_node, ah4_decrypt_node_fn);
+
+static uword
+ah6_decrypt_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return ah_decrypt_inline (vm, node, from_frame, 1 /* is_ip6 */ );
+}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ah_decrypt_node) = {
- .function = ah_decrypt_node_fn,
- .name = "ah-decrypt",
+VLIB_REGISTER_NODE (ah6_decrypt_node) = {
+ .function = ah6_decrypt_node_fn,
+ .name = "ah6-decrypt",
.vector_size = sizeof (u32),
.format_trace = format_ah_decrypt_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
};
/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (ah_decrypt_node, ah_decrypt_node_fn)
+VLIB_NODE_FUNCTION_MULTIARCH (ah6_decrypt_node, ah6_decrypt_node_fn);
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff