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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/*
* Copyright (c) 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Contributed by Brad Parker (brad@fcr.com).
*/
/* \summary: Novell IPX printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include <stdio.h>
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
/* well-known sockets */
#define IPX_SKT_NCP 0x0451
#define IPX_SKT_SAP 0x0452
#define IPX_SKT_RIP 0x0453
#define IPX_SKT_NETBIOS 0x0455
#define IPX_SKT_DIAGNOSTICS 0x0456
#define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */
#define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */
/* IPX transport header */
struct ipxHdr {
nd_uint16_t cksum; /* Checksum */
nd_uint16_t length; /* Length, in bytes, including header */
nd_uint8_t tCtl; /* Transport Control (i.e. hop count) */
nd_uint8_t pType; /* Packet Type (i.e. level 2 protocol) */
nd_uint32_t dstNet; /* destination net */
nd_byte dstNode[6]; /* destination node */
nd_uint16_t dstSkt; /* destination socket */
nd_uint32_t srcNet; /* source net */
nd_byte srcNode[6]; /* source node */
nd_uint16_t srcSkt; /* source socket */
};
#define ipxSize 30
static const char *ipxaddr_string(netdissect_options *, uint32_t, const u_char *);
static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int);
static void ipx_sap_print(netdissect_options *, const u_char *, u_int);
static void ipx_rip_print(netdissect_options *, const u_char *, u_int);
/*
* Print IPX datagram packets.
*/
void
ipx_print(netdissect_options *ndo, const u_char *p, u_int length)
{
const struct ipxHdr *ipx = (const struct ipxHdr *)p;
ndo->ndo_protocol = "ipx";
if (!ndo->ndo_eflag)
ND_PRINT("IPX ");
ND_PRINT("%s.%04x > ",
ipxaddr_string(ndo, GET_BE_U_4(ipx->srcNet), ipx->srcNode),
GET_BE_U_2(ipx->srcSkt));
ND_PRINT("%s.%04x: ",
ipxaddr_string(ndo, GET_BE_U_4(ipx->dstNet), ipx->dstNode),
GET_BE_U_2(ipx->dstSkt));
/* take length from ipx header */
length = GET_BE_U_2(ipx->length);
if (length < ipxSize) {
ND_PRINT("[length %u < %u]", length, ipxSize);
nd_print_invalid(ndo);
return;
}
ipx_decode(ndo, ipx, p + ipxSize, length - ipxSize);
}
static const char *
ipxaddr_string(netdissect_options *ndo, uint32_t net, const u_char *node)
{
static char line[256];
snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
net, GET_U_1(node), GET_U_1(node + 1),
GET_U_1(node + 2), GET_U_1(node + 3),
GET_U_1(node + 4), GET_U_1(node + 5));
return line;
}
static void
ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length)
{
u_short dstSkt;
dstSkt = GET_BE_U_2(ipx->dstSkt);
switch (dstSkt) {
case IPX_SKT_NCP:
ND_PRINT("ipx-ncp %u", length);
break;
case IPX_SKT_SAP:
ipx_sap_print(ndo, datap, length);
break;
case IPX_SKT_RIP:
ipx_rip_print(ndo, datap, length);
break;
case IPX_SKT_NETBIOS:
ND_PRINT("ipx-netbios %u", length);
#ifdef ENABLE_SMB
ipx_netbios_print(ndo, datap, length);
#endif
break;
case IPX_SKT_DIAGNOSTICS:
ND_PRINT("ipx-diags %u", length);
break;
case IPX_SKT_NWLINK_DGM:
ND_PRINT("ipx-nwlink-dgm %u", length);
#ifdef ENABLE_SMB
ipx_netbios_print(ndo, datap, length);
#endif
break;
case IPX_SKT_EIGRP:
eigrp_print(ndo, datap, length);
break;
default:
ND_PRINT("ipx-#%x %u", dstSkt, length);
break;
}
}
static void
ipx_sap_print(netdissect_options *ndo, const u_char *ipx, u_int length)
{
int command, i;
command = GET_BE_U_2(ipx);
ipx += 2;
length -= 2;
switch (command) {
case 1:
case 3:
if (command == 1)
ND_PRINT("ipx-sap-req");
else
ND_PRINT("ipx-sap-nearest-req");
ND_PRINT(" %s", ipxsap_string(ndo, htons(GET_BE_U_2(ipx))));
break;
case 2:
case 4:
if (command == 2)
ND_PRINT("ipx-sap-resp");
else
ND_PRINT("ipx-sap-nearest-resp");
for (i = 0; i < 8 && length != 0; i++) {
ND_TCHECK_2(ipx);
if (length < 2)
goto trunc;
ND_PRINT(" %s '", ipxsap_string(ndo, htons(GET_BE_U_2(ipx))));
ipx += 2;
length -= 2;
if (length < 48) {
ND_PRINT("'");
goto trunc;
}
if (nd_printzp(ndo, ipx, 48, ndo->ndo_snapend)) {
ND_PRINT("'");
goto trunc;
}
ND_PRINT("'");
ipx += 48;
length -= 48;
/*
* 10 bytes of IPX address.
*/
ND_TCHECK_LEN(ipx, 10);
if (length < 10)
goto trunc;
ND_PRINT(" addr %s",
ipxaddr_string(ndo, GET_BE_U_4(ipx), ipx + 4));
ipx += 10;
length -= 10;
/*
* 2 bytes of socket and 2 bytes of number of intermediate
* networks.
*/
ND_TCHECK_4(ipx);
if (length < 4)
goto trunc;
ipx += 4;
length -= 4;
}
break;
default:
ND_PRINT("ipx-sap-?%x", command);
break;
}
return;
trunc:
nd_print_trunc(ndo);
}
static void
ipx_rip_print(netdissect_options *ndo, const u_char *ipx, u_int length)
{
int command, i;
command = GET_BE_U_2(ipx);
ipx += 2;
length -= 2;
switch (command) {
case 1:
ND_PRINT("ipx-rip-req");
if (length != 0) {
if (length < 8)
goto trunc;
ND_TCHECK_8(ipx);
ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx),
GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6));
}
break;
case 2:
ND_PRINT("ipx-rip-resp");
for (i = 0; i < 50 && length != 0; i++) {
if (length < 8)
goto trunc;
ND_TCHECK_8(ipx);
ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx),
GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6));
ipx += 8;
length -= 8;
}
break;
default:
ND_PRINT("ipx-rip-?%x", command);
break;
}
return;
trunc:
nd_print_trunc(ndo);
}
|
