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+
+/*
+ * cdp.h - cdp protocol plug-in
+ *
+ * Copyright (c) 2011-2018 by 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_cdp_h__
+#define __included_cdp_h__
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+
+#include <vnet/snap/snap.h>
+#include <vnet/hdlc/hdlc.h>
+#include <vnet/hdlc/packet.h>
+
+#include <vppinfra/format.h>
+#include <vppinfra/hash.h>
+
+#include "cdp_protocol.h"
+
+typedef enum
+{
+ CDP_PACKET_TEMPLATE_ETHERNET,
+ CDP_PACKET_TEMPLATE_HDLC,
+ CDP_PACKET_TEMPLATE_SRP,
+ CDP_N_PACKET_TEMPLATES,
+} cdp_packet_template_id_t;
+
+typedef struct
+{
+ /* neighbor's vlib software interface index */
+ u32 sw_if_index;
+
+ /* Timers */
+ f64 last_heard;
+ f64 last_sent;
+
+ /* Neighbor time-to-live (usually 180s) */
+ u8 ttl_in_seconds;
+
+ /* "no cdp run" or similar */
+ u8 disabled;
+
+ /* tx packet template id for this neighbor */
+ u8 packet_template_index;
+
+ /* Jenkins hash optimization: avoid tlv scan, send short keepalive msg */
+ u8 last_packet_signature_valid;
+ uword last_packet_signature;
+
+ /* Info we actually keep about each neighbor */
+ u8 *device_name;
+ u8 *version;
+ u8 *port_id;
+ u8 *platform;
+
+ /* last received packet, for the J-hash optimization */
+ u8 *last_rx_pkt;
+} cdp_neighbor_t;
+
+#define foreach_neighbor_string_field \
+_(device_name) \
+_(version) \
+_(port_id) \
+_(platform)
+
+typedef struct
+{
+ /* pool of cdp neighbors */
+ cdp_neighbor_t *neighbors;
+
+ /* plugin message id base */
+ u16 msg_id_base;
+
+ /* tx pcap debug enable */
+ u8 tx_pcap_debug;
+
+ /* rapidly find a neighbor by vlib software interface index */
+ uword *neighbor_by_sw_if_index;
+
+ /* Background process node index */
+ u32 cdp_process_node_index;
+
+ /* top-level state */
+ int enabled;
+
+ /* Packet templates for different encap types */
+ vlib_packet_template_t packet_templates[CDP_N_PACKET_TEMPLATES];
+
+ /* convenience variables */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+} cdp_main_t;
+
+extern cdp_main_t cdp_main;
+extern vlib_node_registration_t cdp_process_node;
+
+/* Packet counters */
+#define foreach_cdp_error \
+_ (NONE, "good cdp packets (processed)") \
+_ (CACHE_HIT, "good cdp packets (cache hit)") \
+_ (BAD_TLV, "cdp packets with bad TLVs") \
+_ (PROTOCOL_VERSION, "cdp packets with bad protocol versions") \
+_ (CHECKSUM, "cdp packets with bad checksums") \
+_ (DISABLED, "cdp packets received on disabled interfaces")
+
+typedef enum
+{
+#define _(sym,str) CDP_ERROR_##sym,
+ foreach_cdp_error
+#undef _
+ CDP_N_ERROR,
+} cdp_error_t;
+
+/* cdp packet trace capture */
+typedef struct
+{
+ u32 len;
+ u8 data[400];
+} cdp_input_trace_t;
+
+typedef enum
+{
+ CDP_EVENT_ENABLE,
+ CDP_EVENT_DISABLE,
+} cdp_process_event_t;
+
+cdp_error_t cdp_input (vlib_main_t * vm, vlib_buffer_t * b0, u32 bi0);
+void cdp_periodic (vlib_main_t * vm);
+void cdp_keepalive (cdp_main_t * cm, cdp_neighbor_t * n);
+u16 cdp_checksum (void *p, int count);
+u8 *cdp_input_format_trace (u8 * s, va_list * args);
+
+#endif /* __included_cdp_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */