1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* cdpr - Cisco Discovery Protocol Reporter
* Copyright (c) 2002-2006 MonkeyMental.com
*
* This program will show you which Cisco device your machine is
* connected to based on CDP packets received.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef WIN32
#include <netinet/in.h>
#endif
/* Define the constants and text values for the 'type' field: */
#define TYPE_DEVICE_ID 0x0001
#define TYPE_ADDRESS 0x0002
#define TYPE_PORT_ID 0x0003
#define TYPE_CAPABILITIES 0x0004
#define TYPE_IOS_VERSION 0x0005
#define TYPE_PLATFORM 0x0006
#define TYPE_IP_PREFIX 0x0007
#define TYPE_VTP_MGMT_DOMAIN 0x0009
#define TYPE_NATIVE_VLAN 0x000a
#define TYPE_DUPLEX 0x000b
struct
{
int type;
char *val;
}
type_vals[] = {
{ TYPE_DEVICE_ID, "Device ID" },
{ TYPE_ADDRESS, "Addresses" },
{ TYPE_PORT_ID, "Port ID" },
{ TYPE_CAPABILITIES, "Capabilities" },
{ TYPE_IOS_VERSION, "Software version" },
{ TYPE_PLATFORM, "Platform" },
{ TYPE_IP_PREFIX, "IP Prefix (used for ODR)" },
{ TYPE_VTP_MGMT_DOMAIN, "VTP Management Domain" },
{ TYPE_NATIVE_VLAN, "Native VLAN" },
{ TYPE_DUPLEX, "Duplex" },
{ 0, NULL },
};
typedef struct _cdp_packet_header
{
u_int8_t version; // always one
u_int8_t time_to_live; // in seconds
u_int16_t checksum; // ip checksum
} CDP_HDR;
typedef struct _cfp_packet_data
{
u_int16_t type; // see TYPE_ above
u_int16_t length; // total length of type/length/value
// value; // variable length value
} CDP_DATA;
|
