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authorKlement Sekera <ksekera@cisco.com>2018-05-16 10:52:45 +0200
committerFlorin Coras <florin.coras@gmail.com>2018-06-21 14:50:10 +0000
commita98346f664aae148d26a8e158008b773d73db96f (patch)
tree2a850b1925f3dd70817fb0e41324baef71fd7a05 /src/vnet/ipsec/ipsec_if.c
parent56ba844d6a8b8f58b18fe51bf22707b0c37d3a87 (diff)
ipsec: VPP-1316 calculate IP/TCP/UDP inner checksums
Calculate IP/TCP/UDP checksums in software before adding authentication. Change-Id: I3e121cb00aeba667764f39ade8d62170f18f8b6b Signed-off-by: Klement Sekera <ksekera@cisco.com>
Diffstat (limited to 'src/vnet/ipsec/ipsec_if.c')
-rw-r--r--src/vnet/ipsec/ipsec_if.c138
1 files changed, 131 insertions, 7 deletions
diff --git a/src/vnet/ipsec/ipsec_if.c b/src/vnet/ipsec/ipsec_if.c
index e7536b2756e..a7dbcbadb16 100644
--- a/src/vnet/ipsec/ipsec_if.c
+++ b/src/vnet/ipsec/ipsec_if.c
@@ -34,14 +34,128 @@ format_ipsec_name (u8 * s, va_list * args)
return format (s, "ipsec%d", t->show_instance);
}
+/* Statistics (not really errors) */
+#define foreach_ipsec_if_tx_error \
+_(TX, "good packets transmitted")
+
+static char *ipsec_if_tx_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ipsec_if_tx_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) IPSEC_IF_OUTPUT_ERROR_##sym,
+ foreach_ipsec_if_tx_error
+#undef _
+ IPSEC_IF_TX_N_ERROR,
+} ipsec_if_tx_error_t;
+
+typedef struct
+{
+ u32 spi;
+ u32 seq;
+} ipsec_if_tx_trace_t;
+
+u8 *
+format_ipsec_if_tx_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ ipsec_if_tx_trace_t *t = va_arg (*args, ipsec_if_tx_trace_t *);
+
+ s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
+ return s;
+}
+
static uword
-dummy_interface_tx (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
+ipsec_if_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
{
- clib_warning ("you shouldn't be here, leaking buffers...");
- return frame->n_vectors;
+ ipsec_main_t *im = &ipsec_main;
+ vnet_main_t *vnm = im->vnet_main;
+ vnet_interface_main_t *vim = &vnm->interface_main;
+ u32 *from, *to_next = 0, next_index;
+ u32 n_left_from, sw_if_index0, last_sw_if_index = ~0;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 n_bytes = 0, n_packets = 0;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, next0, len0;
+ vlib_buffer_t *b0;
+ ipsec_tunnel_if_t *t0;
+ vnet_hw_interface_t *hi0;
+
+ bi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+ b0 = vlib_get_buffer (vm, bi0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ hi0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
+ t0 = pool_elt_at_index (im->tunnel_interfaces, hi0->dev_instance);
+ vnet_buffer (b0)->ipsec.sad_index = t0->output_sa_index;
+ next0 = IPSEC_OUTPUT_NEXT_ESP_ENCRYPT;
+
+ len0 = vlib_buffer_length_in_chain (vm, b0);
+
+ if (PREDICT_TRUE (sw_if_index0 == last_sw_if_index))
+ {
+ n_packets++;
+ n_bytes += len0;
+ }
+ else
+ {
+ vlib_increment_combined_counter (vim->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_TX,
+ thread_index, sw_if_index0,
+ n_packets, n_bytes);
+ last_sw_if_index = sw_if_index0;
+ n_packets = 1;
+ n_bytes = len0;
+ }
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ipsec_if_tx_trace_t *tr =
+ vlib_add_trace (vm, node, b0, sizeof (*tr));
+ ipsec_sa_t *sa0 =
+ pool_elt_at_index (im->sad, t0->output_sa_index);
+ tr->spi = sa0->spi;
+ tr->seq = sa0->seq;
+ }
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ if (last_sw_if_index != ~0)
+ {
+ vlib_increment_combined_counter (vim->combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_TX,
+ thread_index,
+ last_sw_if_index, n_packets, n_bytes);
+ }
+
+ return from_frame->n_vectors;
}
+
static clib_error_t *
ipsec_admin_up_down_function (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
{
@@ -113,13 +227,16 @@ ipsec_admin_up_down_function (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
return /* no error */ 0;
}
+
/* *INDENT-OFF* */
VNET_DEVICE_CLASS (ipsec_device_class, static) =
{
.name = "IPSec",
.format_device_name = format_ipsec_name,
- .format_tx_trace = format_ipsec_if_output_trace,
- .tx_function = dummy_interface_tx,
+ .format_tx_trace = format_ipsec_if_tx_trace,
+ .tx_function = ipsec_if_tx_node_fn,
+ .tx_function_n_errors = IPSEC_IF_TX_N_ERROR,
+ .tx_function_error_strings = ipsec_if_tx_error_strings,
.admin_up_down_function = ipsec_admin_up_down_function,
};
/* *INDENT-ON* */
@@ -162,6 +279,7 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
uword *p;
ipsec_sa_t *sa;
u32 dev_instance;
+ u32 slot;
u64 key = (u64) args->remote_ip.as_u32 << 32 | (u64) args->remote_spi;
p = hash_get (im->ipsec_if_pool_index_by_key, key);
@@ -247,7 +365,13 @@ ipsec_add_del_tunnel_if_internal (vnet_main_t * vnm,
t - im->tunnel_interfaces);
hi = vnet_get_hw_interface (vnm, hw_if_index);
- hi->output_node_index = ipsec_if_output_node.index;
+
+ slot = vlib_node_add_named_next_with_slot
+ (vnm->vlib_main, hi->tx_node_index, "esp-encrypt",
+ IPSEC_OUTPUT_NEXT_ESP_ENCRYPT);
+
+ ASSERT (slot == IPSEC_OUTPUT_NEXT_ESP_ENCRYPT);
+
t->hw_if_index = hw_if_index;
vnet_feature_enable_disable ("interface-output", "ipsec-if-output",