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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/* $OpenBSD: print-vqp.c,v 1.6 2006/08/20 23:39:42 stevesk Exp $ */
/*
* Copyright (c) 2006 Kevin Steves <stevesk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* VLAN Query Protocol (VQP)
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Version | Opcode | Response Code | Data Count |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Transaction ID |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type (1) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Length | Data /
* / /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Type (n) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Length | Data /
* / /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* VQP is layered over UDP. The default destination port is 1589.
*
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
struct vqp_hdr {
u_char version;
u_char opcode;
u_char rcode;
u_char dcount;
u_int32_t xid;
};
#define VQP_JOIN 0x01
#define VQP_JOIN_RESPONSE 0x02
#define VQP_RECONFIRM 0x03
#define VQP_RECONFIRM_RESPONSE 0x04
#define VQP_NO_ERROR 0x00
#define VQP_WRONG_VERSION 0x01
#define VQP_INSUFFICIENT_RESOURCES 0x02
#define VQP_DENY 0x03
#define VQP_SHUTDOWN 0x04
#define VQP_WRONG_MGMT_DOMAIN 0x05
/* 4 bytes struct in_addr; IP address of VQP client */
#define VQP_CLIENT_ADDR 0x00000c01
/* string */
#define VQP_PORT_NAME 0x00000c02
/* string */
#define VQP_VLAN_NAME 0x00000c03
/* string; VTP domain if set */
#define VQP_DOMAIN_NAME 0x00000c04
/* 2 bytes? */
#define VQP_UNKNOWN1 0x00000c05
/* 6 bytes, mac address */
#define VQP_MAC 0x00000c06
/* unknown */
#define VQP_UNKNOWN2 0x00000c07
/* 6 bytes, mac address */
#define VQP_COOKIE 0x00000c08
static void
vqp_print_opcode(u_int val)
{
switch (val) {
case VQP_JOIN:
printf("Join");
break;
case VQP_JOIN_RESPONSE:
printf("JoinResp");
break;
case VQP_RECONFIRM:
printf("Reconfirm");
break;
case VQP_RECONFIRM_RESPONSE:
printf("ReconfirmResp");
break;
default:
printf("unknown(%x)", val);
break;
}
}
static void
vqp_print_rcode(u_int val)
{
switch (val) {
case VQP_NO_ERROR:
printf("NoError");
break;
case VQP_WRONG_VERSION:
printf("WrongVersion");
break;
case VQP_INSUFFICIENT_RESOURCES:
printf("InsufficientResources");
break;
case VQP_DENY:
printf("Deny");
break;
case VQP_SHUTDOWN:
printf("Shutdown");
break;
case VQP_WRONG_MGMT_DOMAIN:
printf("WrongMgmtDomain");
break;
default:
printf("unknown(%x)", val);
break;
}
}
static void
print_hex(const u_char *p, u_int len)
{
while (len--)
printf("%02x", *p++);
}
static void
vqp_print_type(u_int type, u_int len, const u_char *p)
{
switch (type) {
case VQP_CLIENT_ADDR:
printf(" client:");
if (len == sizeof(struct in_addr)) {
struct in_addr in;
memcpy(&in, p, sizeof in);
printf("%s", inet_ntoa(in));
} else
print_hex(p, len);
break;
case VQP_PORT_NAME:
printf(" port:");
fn_printn(p, len, NULL);
break;
case VQP_VLAN_NAME:
printf(" vlan:");
fn_printn(p, len, NULL);
break;
case VQP_DOMAIN_NAME:
printf(" domain:");
fn_printn(p, len, NULL);
break;
case VQP_UNKNOWN1:
printf(" unknown1:");
print_hex(p, len);
break;
case VQP_MAC:
printf(" mac:");
if (len == ETHER_ADDR_LEN)
printf("%s", etheraddr_string(p));
else
print_hex(p, len);
break;
case VQP_UNKNOWN2:
printf(" unknown2:");
print_hex(p, len);
break;
case VQP_COOKIE:
printf(" cookie:");
if (len == ETHER_ADDR_LEN)
printf("%s", etheraddr_string(p));
else
print_hex(p, len);
break;
default:
printf(" unknown(%x/%u)", type, len);
}
}
void
vqp_print(const u_char *bp, u_int len)
{
struct vqp_hdr *p = (struct vqp_hdr *)bp;
u_int dcount;
TCHECK(p->version);
printf(" VQPv%u", p->version);
if (p->version != 1)
return;
TCHECK(p->opcode);
printf("-");
vqp_print_opcode(p->opcode);
TCHECK(p->rcode);
printf(" rcode:");
vqp_print_rcode(p->rcode);
TCHECK(p->xid);
printf(" xid:0x%08x", ntohl(p->xid));
printf(" dcount:%u", p->dcount);
bp += sizeof(struct vqp_hdr);
dcount = p->dcount;
while (vflag && dcount > 0) {
u_int type, length;
TCHECK2(bp[0], 6);
type = EXTRACT_32BITS(bp);
bp += 4;
length = EXTRACT_16BITS(bp);
bp += 2;
TCHECK2(bp[0], length);
vqp_print_type(type, length, bp);
bp += length;
dcount--;
}
return;
trunc:
printf("[|vqp]");
}
|
