--- /dev/null
+/*
+ * 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.
+ */
+#ifndef __included_cdp_protocol_h__
+#define __included_cdp_protocol_h__
+
+#include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
+#include <vnet/llc/llc.h>
+#include <vnet/snap/snap.h>
+#include <vnet/srp/packet.h>
+
+typedef CLIB_PACKED (struct {
+ u8 version;
+ u8 ttl;
+ u16 checksum; /* 1's complement of the 1's complement sum */
+ u8 data[0];
+}) cdp_hdr_t;
+
+typedef struct {
+ u8 dst_address[6];
+ u8 src_address[6];
+ u16 len;
+} ethernet_802_3_header_t;
+
+typedef CLIB_PACKED (struct {
+ ethernet_802_3_header_t ethernet;
+ llc_header_t llc;
+ snap_header_t snap;
+ cdp_hdr_t cdp;
+}) ethernet_llc_snap_and_cdp_header_t;
+
+typedef CLIB_PACKED (struct {
+ hdlc_header_t hdlc;
+ cdp_hdr_t cdp;
+}) hdlc_and_cdp_header_t;
+
+typedef CLIB_PACKED (struct {
+ srp_header_t srp;
+ ethernet_header_t ethernet;
+ cdp_hdr_t cdp;
+}) srp_and_cdp_header_t;
+
+typedef CLIB_PACKED (struct {
+ u16 t;
+ u16 l;
+ u8 v[0];
+}) cdp_tlv_t;
+
+/*
+ * TLV codes.
+ */
+#define foreach_cdp_tlv_type \
+_(unused) \
+_(device_name) /* uniquely identifies the device */ \
+_(address) /* list of addresses this device has */ \
+_(port_id) /* port CDP packet was sent out on */ \
+_(capabilities) /* funct. capabilities of the device */ \
+_(version) /* version */ \
+_(platform) /* hardware platform of this device */ \
+_(ipprefix) /* An IP network prefix */ \
+_(hello) /* Pprotocol piggyback hello msg */ \
+_(vtp_domain) /* VTP management domain */ \
+_(native_vlan) /* Native VLAN number */ \
+_(duplex) /* The interface duplex mode */ \
+_(appl_vlan) /* Appliance VLAN-ID TLV */ \
+_(trigger) /* For sending trigger TLV msgs. */ \
+_(power) /* Power consumption of that device */ \
+_(mtu) /* MTU defined for sending intf. */ \
+_(trust) /* Extended trust TLV */ \
+_(cos) /* COS for Untrusted Port TLV */ \
+_(sysname) /* System name (FQDN of device) */ \
+_(sysobject) /* OID of sysObjectID MIB object */ \
+_(mgmt_addr) /* SNMP manageable addrs. of device */ \
+_(physical_loc) /* Physical Location of the device */ \
+_(mgmt_addr2) /* External Port-ID */ \
+_(power_requested) \
+_(power_available) \
+_(port_unidirectional) \
+_(unknown_28) \
+_(energywise) \
+_(unknown_30) \
+_(spare_poe)
+
+typedef enum {
+#define _(t) CDP_TLV_##t,
+ foreach_cdp_tlv_type
+#undef _
+} cdp_tlv_code_t;
+
+/*
+ The address TLV looks as follows:
+
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Number of addresses |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | IDRP encoded address |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ An address is encoded in IDRP format:
+
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | PT | PT Length | Protocol (variable) ...
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Address length | Address (variable) ...
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ PT: Protocol type
+ 1 = NLPID format
+ 2 = 802.2 format
+
+ PT Length:
+ Length of protocol field, 1 for PT = 1, and either 3 or 8 for
+ 802.2 format depending if SNAP is used for PT = 2.
+
+ The encodings for the other protocols have the following format:
+
+ field: <SSAP><DSAP><CTRL><-------OUI------><protocl_TYPE>
+ | | | | | | | | |
+ bytes: 0 1 2 3 4 5 6 7 8
+
+ where the first 3 bytes are 0xAAAA03 for SNAP encoded addresses.
+ The OUI is 000000 for ethernet and <protocl_TYPE>
+ is the assigned Ethernet type code for the particular protocol.
+ e.g. for DECnet the encoding is AAAA03 000000 6003.
+ for IPv6 the encoding is AAAA03 000000 86DD
+*/
+
+/*
+ * Capabilities.
+ */
+
+#define CDP_ROUTER_DEVICE 0x0001
+#define CDP_TB_DEVICE 0x0002
+#define CDP_SRB_DEVICE 0x0004
+#define CDP_SWITCH_DEVICE 0x0008
+#define CDP_HOST_DEVICE 0x0010
+#define CDP_IGMP_DEVICE 0x0020
+#define CDP_REPEATER_DEVICE 0x0040
+
+/*
+ The protocol-hello TLV looks as follows:
+
+ 0 1 2 3
+ 012345678901234567890123456789012345678
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Type | Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | OUI |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Protocol ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | up to 27 bytes of message |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+/*
+ * These macros define the valid values for the Duplex TLV.
+ */
+#define CDP_DUPLEX_TLV_HALF 0x0
+#define CDP_DUPLEX_TLV_FULL 0x1
+
+#endif /* __included_cdp_protocol_h__ */
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