1 files changed, 124 insertions, 0 deletions
diff --git a/src/vnet/bfd/bfd_udp.h b/src/vnet/bfd/bfd_udp.h
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+/* * Copyright (c) 2011-2016 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.
+ */
+/**
+ * @file
+ * @brief BFD UDP transport layer declarations
+ */
+
+#ifndef __included_bfd_udp_h__
+#define __included_bfd_udp_h__
+
+#include <vppinfra/clib.h>
+#include <vnet/adj/adj_types.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/bfd/bfd_api.h>
+
+/* *INDENT-OFF* */
+/** identifier of BFD session based on UDP transport only */
+typedef CLIB_PACKED (struct {
+  union {
+    /** interface to which the session is tied - single-hop */
+    u32 sw_if_index;
+    /** the FIB index the peer is in - multi-hop*/
+    u32 fib_index;
+  };
+  /** local address */
+  ip46_address_t local_addr;
+  /** peer address */
+  ip46_address_t peer_addr;
+}) bfd_udp_key_t;
+/* *INDENT-ON* */
+
+/** UDP transport specific data embedded in bfd_session's union */
+typedef struct
+{
+  /** key identifying this session */
+  bfd_udp_key_t key;
+  /** adjacency index returned from adj lock call */
+  adj_index_t adj_index;
+} bfd_udp_session_t;
+
+/** bfd udp echo packet trace capture */
+typedef struct
+{
+  u32 len;
+  u8 data[400];
+} bfd_udp_echo_input_trace_t;
+
+struct bfd_session_s;
+
+/**
+ * @brief add the necessary transport layer by prepending it to existing data
+ *
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_add_udp4_transport (vlib_main_t * vm, u32 bi,
+			    const struct bfd_session_s *bs, int is_echo);
+
+/**
+ * @brief add the necessary transport layer by prepending it to existing data
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_add_udp6_transport (vlib_main_t * vm, u32 bi,
+			    const struct bfd_session_s *bs, int is_echo);
+
+/**
+ * @brief transport packet over udpv4
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_transport_udp4 (vlib_main_t * vm, u32 bi,
+			const struct bfd_session_s *bs);
+
+/**
+ * @brief transport packet over udpv6
+ *
+ * @param is_echo 1 if this is echo packet, 0 if control frame
+ *
+ * @return 1 on success, 0 on failure
+ */
+int bfd_transport_udp6 (vlib_main_t * vm, u32 bi,
+			const struct bfd_session_s *bs);
+
+/**
+ * @brief check if the bfd udp layer is echo-capable at this time
+ *
+ * @return 1 if available, 0 otherwise
+ */
+int bfd_udp_is_echo_available (bfd_transport_e transport);
+
+/**
+ * @brief get echo source information - used by CLI
+ */
+void bfd_udp_get_echo_source (int *is_set, u32 * sw_if_index,
+			      int *have_usable_ip4, ip4_address_t * ip4,
+			      int *have_usable_ip6, ip6_address_t * ip6);
+
+#endif /* __included_bfd_udp_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */