aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h
diff options
context:
space:
mode:
authorVengada Govindan <venggovi@cisco.com>2016-10-12 05:54:09 -0700
committerVengada Govindan <venggovi@cisco.com>2016-12-09 06:15:02 +0000
commit6d403a013276f095e542c9b6281db96354fa6f07 (patch)
tree3954b21a8fe2bb789d42f6f6234344d39c4e1e4d /plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h
parentc9b20bc7a5399fd1e7bf2d33e7c4f1f08ef1c1e4 (diff)
VPP-470: Introduce VxLAN-GPE as transport for iOAM.
See Jira ticket for more details - New plugins created to (a) Add VxLAN-GPE as transport (b) Provide export infra for VxLAN-GPE. Change-Id: Ife50c7434f53d17a4783062310f73d063d53494c Signed-off-by: Vengada Govindan <venggovi@cisco.com>
Diffstat (limited to 'plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h')
-rw-r--r--plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h173
1 files changed, 173 insertions, 0 deletions
diff --git a/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h
new file mode 100644
index 00000000000..138eba1a4c4
--- /dev/null
+++ b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_vxlan_gpe_ioam_util_h__
+#define __included_vxlan_gpe_ioam_util_h__
+
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
+#include <vnet/ip/ip.h>
+
+
+typedef struct
+{
+ u32 tunnel_index;
+ ioam_trace_t fmt_trace;
+} vxlan_gpe_ioam_v4_trace_t;
+
+
+static u8 *
+format_vxlan_gpe_ioam_v4_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 *);
+ vxlan_gpe_ioam_v4_trace_t *t1 = va_arg (*args, vxlan_gpe_ioam_v4_trace_t *);
+ ioam_trace_t *t = &(t1->fmt_trace);
+ vxlan_gpe_ioam_option_t *fmt_trace0;
+ vxlan_gpe_ioam_option_t *opt0, *limit0;
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+ u8 type0;
+
+ fmt_trace0 = (vxlan_gpe_ioam_option_t *) t->option_data;
+
+ s = format (s, "VXLAN-GPE-IOAM: next_index %d len %d traced %d",
+ t->next_index, fmt_trace0->length, t->trace_len);
+
+ opt0 = (vxlan_gpe_ioam_option_t *) (fmt_trace0 + 1);
+ limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) fmt_trace0) + t->trace_len;
+
+ while (opt0 < limit0)
+ {
+ type0 = opt0->type;
+ switch (type0)
+ {
+ case 0: /* Pad, just stop */
+ opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
+ break;
+
+ default:
+ if (hm->trace[type0])
+ {
+ s = (*hm->trace[type0]) (s, opt0);
+ }
+ else
+ {
+ s =
+ format (s, "\n unrecognized option %d length %d", type0,
+ opt0->length);
+ }
+ opt0 =
+ (vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
+ sizeof (vxlan_gpe_ioam_option_t));
+ break;
+ }
+ }
+
+ s = format (s, "VXLAN-GPE-IOAM: tunnel %d", t1->tunnel_index);
+ return s;
+}
+
+
+always_inline void
+vxlan_gpe_encap_decap_ioam_v4_one_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vxlan_gpe_main_t * ngm,
+ vlib_buffer_t * b0,
+ u32 * next0, u32 drop_node_val,
+ u8 use_adj)
+{
+ ip4_header_t *ip0;
+ udp_header_t *udp_hdr0;
+ vxlan_gpe_header_t *gpe_hdr0;
+ vxlan_gpe_ioam_hdr_t *gpe_ioam0;
+ vxlan_gpe_ioam_option_t *opt0;
+ vxlan_gpe_ioam_option_t *limit0;
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+ /* Populate the iOAM header */
+ ip0 = vlib_buffer_get_current (b0);
+ udp_hdr0 = (udp_header_t *) (ip0 + 1);
+ gpe_hdr0 = (vxlan_gpe_header_t *) (udp_hdr0 + 1);
+ gpe_ioam0 = (vxlan_gpe_ioam_hdr_t *) (gpe_hdr0 + 1);
+ opt0 = (vxlan_gpe_ioam_option_t *) (gpe_ioam0 + 1);
+ limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) gpe_ioam0 + gpe_ioam0->length);
+
+ /*
+ * Basic validity checks
+ */
+ if (gpe_ioam0->length > clib_net_to_host_u16 (ip0->length))
+ {
+ *next0 = drop_node_val;
+ return;
+ }
+
+ /* Scan the set of h-b-h options, process ones that we understand */
+ while (opt0 < limit0)
+ {
+ u8 type0;
+ type0 = opt0->type;
+ switch (type0)
+ {
+ case 0: /* Pad1 */
+ opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
+ continue;
+ case 1: /* PadN */
+ break;
+ default:
+ if (hm->options[type0])
+ {
+ if ((*hm->options[type0]) (b0, opt0, 1 /* is_ipv4 */ ,
+ use_adj) < 0)
+ {
+ *next0 = drop_node_val;
+ return;
+ }
+ }
+ break;
+ }
+ opt0 =
+ (vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
+ sizeof (vxlan_gpe_ioam_hdr_t));
+ }
+
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_gpe_ioam_v4_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ u32 trace_len = gpe_ioam0->length;
+ t->fmt_trace.next_index = *next0;
+ /* Capture the ioam option verbatim */
+ trace_len =
+ trace_len <
+ ARRAY_LEN (t->fmt_trace.
+ option_data) ? trace_len : ARRAY_LEN (t->fmt_trace.
+ option_data);
+ t->fmt_trace.trace_len = trace_len;
+ clib_memcpy (&(t->fmt_trace.option_data), gpe_ioam0, trace_len);
+ }
+ return;
+}
+
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */