• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*     NetBSD: print-juniper.c,v 1.2 2007/07/24 11:53:45 drochner Exp        */
2 
3 /*
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that: (1) source code
6  * distributions retain the above copyright notice and this paragraph
7  * in its entirety, and (2) distributions including binary code include
8  * the above copyright notice and this paragraph in its entirety in
9  * the documentation or other materials provided with the distribution.
10  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
11  * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
12  * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13  * FOR A PARTICULAR PURPOSE.
14  *
15  * Original code by Hannes Gredler (hannes@juniper.net)
16  */
17 
18 /* \summary: DLT_JUNIPER_* printers */
19 
20 #ifndef lint
21 #else
22 __RCSID("NetBSD: print-juniper.c,v 1.3 2007/07/25 06:31:32 dogcow Exp ");
23 #endif
24 
25 #ifdef HAVE_CONFIG_H
26 #include "config.h"
27 #endif
28 
29 #include <netdissect-stdinc.h>
30 
31 #include <string.h>
32 
33 #include "netdissect.h"
34 #include "addrtoname.h"
35 #include "extract.h"
36 #include "ppp.h"
37 #include "llc.h"
38 #include "nlpid.h"
39 #include "ethertype.h"
40 #include "atm.h"
41 
42 #define JUNIPER_BPF_OUT           0       /* Outgoing packet */
43 #define JUNIPER_BPF_IN            1       /* Incoming packet */
44 #define JUNIPER_BPF_PKT_IN        0x1     /* Incoming packet */
45 #define JUNIPER_BPF_NO_L2         0x2     /* L2 header stripped */
46 #define JUNIPER_BPF_IIF           0x4     /* IIF is valid */
47 #define JUNIPER_BPF_FILTER        0x40    /* BPF filtering is supported */
48 #define JUNIPER_BPF_EXT           0x80    /* extensions present */
49 #define JUNIPER_MGC_NUMBER        0x4d4743 /* = "MGC" */
50 
51 #define JUNIPER_LSQ_COOKIE_RE         (1 << 3)
52 #define JUNIPER_LSQ_COOKIE_DIR        (1 << 2)
53 #define JUNIPER_LSQ_L3_PROTO_SHIFT     4
54 #define JUNIPER_LSQ_L3_PROTO_MASK     (0x17 << JUNIPER_LSQ_L3_PROTO_SHIFT)
55 #define JUNIPER_LSQ_L3_PROTO_IPV4     (0 << JUNIPER_LSQ_L3_PROTO_SHIFT)
56 #define JUNIPER_LSQ_L3_PROTO_IPV6     (1 << JUNIPER_LSQ_L3_PROTO_SHIFT)
57 #define JUNIPER_LSQ_L3_PROTO_MPLS     (2 << JUNIPER_LSQ_L3_PROTO_SHIFT)
58 #define JUNIPER_LSQ_L3_PROTO_ISO      (3 << JUNIPER_LSQ_L3_PROTO_SHIFT)
59 #define AS_PIC_COOKIE_LEN 8
60 
61 #define JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE 1
62 #define JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE 2
63 #define JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE 3
64 #define JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE 4
65 #define JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE 5
66 
67 static const struct tok juniper_ipsec_type_values[] = {
68     { JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE, "ESP ENCR-AUTH" },
69     { JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE, "ESP ENCR-AH AUTH" },
70     { JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE, "ESP AUTH" },
71     { JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE, "AH AUTH" },
72     { JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE, "ESP ENCR" },
73     { 0, NULL}
74 };
75 
76 static const struct tok juniper_direction_values[] = {
77     { JUNIPER_BPF_IN,  "In"},
78     { JUNIPER_BPF_OUT, "Out"},
79     { 0, NULL}
80 };
81 
82 /* codepoints for encoding extensions to a .pcap file */
83 enum {
84     JUNIPER_EXT_TLV_IFD_IDX = 1,
85     JUNIPER_EXT_TLV_IFD_NAME = 2,
86     JUNIPER_EXT_TLV_IFD_MEDIATYPE = 3,
87     JUNIPER_EXT_TLV_IFL_IDX = 4,
88     JUNIPER_EXT_TLV_IFL_UNIT = 5,
89     JUNIPER_EXT_TLV_IFL_ENCAPS = 6,
90     JUNIPER_EXT_TLV_TTP_IFD_MEDIATYPE = 7,
91     JUNIPER_EXT_TLV_TTP_IFL_ENCAPS = 8
92 };
93 
94 /* 1 byte type and 1-byte length */
95 #define JUNIPER_EXT_TLV_OVERHEAD 2U
96 
97 static const struct tok jnx_ext_tlv_values[] = {
98     { JUNIPER_EXT_TLV_IFD_IDX, "Device Interface Index" },
99     { JUNIPER_EXT_TLV_IFD_NAME,"Device Interface Name" },
100     { JUNIPER_EXT_TLV_IFD_MEDIATYPE, "Device Media Type" },
101     { JUNIPER_EXT_TLV_IFL_IDX, "Logical Interface Index" },
102     { JUNIPER_EXT_TLV_IFL_UNIT,"Logical Unit Number" },
103     { JUNIPER_EXT_TLV_IFL_ENCAPS, "Logical Interface Encapsulation" },
104     { JUNIPER_EXT_TLV_TTP_IFD_MEDIATYPE, "TTP derived Device Media Type" },
105     { JUNIPER_EXT_TLV_TTP_IFL_ENCAPS, "TTP derived Logical Interface Encapsulation" },
106     { 0, NULL }
107 };
108 
109 static const struct tok jnx_flag_values[] = {
110     { JUNIPER_BPF_EXT, "Ext" },
111     { JUNIPER_BPF_FILTER, "Filter" },
112     { JUNIPER_BPF_IIF, "IIF" },
113     { JUNIPER_BPF_NO_L2, "no-L2" },
114     { JUNIPER_BPF_PKT_IN, "In" },
115     { 0, NULL }
116 };
117 
118 #define JUNIPER_IFML_ETHER              1
119 #define JUNIPER_IFML_FDDI               2
120 #define JUNIPER_IFML_TOKENRING          3
121 #define JUNIPER_IFML_PPP                4
122 #define JUNIPER_IFML_FRAMERELAY         5
123 #define JUNIPER_IFML_CISCOHDLC          6
124 #define JUNIPER_IFML_SMDSDXI            7
125 #define JUNIPER_IFML_ATMPVC             8
126 #define JUNIPER_IFML_PPP_CCC            9
127 #define JUNIPER_IFML_FRAMERELAY_CCC     10
128 #define JUNIPER_IFML_IPIP               11
129 #define JUNIPER_IFML_GRE                12
130 #define JUNIPER_IFML_PIM                13
131 #define JUNIPER_IFML_PIMD               14
132 #define JUNIPER_IFML_CISCOHDLC_CCC      15
133 #define JUNIPER_IFML_VLAN_CCC           16
134 #define JUNIPER_IFML_MLPPP              17
135 #define JUNIPER_IFML_MLFR               18
136 #define JUNIPER_IFML_ML                 19
137 #define JUNIPER_IFML_LSI                20
138 #define JUNIPER_IFML_DFE                21
139 #define JUNIPER_IFML_ATM_CELLRELAY_CCC  22
140 #define JUNIPER_IFML_CRYPTO             23
141 #define JUNIPER_IFML_GGSN               24
142 #define JUNIPER_IFML_LSI_PPP            25
143 #define JUNIPER_IFML_LSI_CISCOHDLC      26
144 #define JUNIPER_IFML_PPP_TCC            27
145 #define JUNIPER_IFML_FRAMERELAY_TCC     28
146 #define JUNIPER_IFML_CISCOHDLC_TCC      29
147 #define JUNIPER_IFML_ETHERNET_CCC       30
148 #define JUNIPER_IFML_VT                 31
149 #define JUNIPER_IFML_EXTENDED_VLAN_CCC  32
150 #define JUNIPER_IFML_ETHER_OVER_ATM     33
151 #define JUNIPER_IFML_MONITOR            34
152 #define JUNIPER_IFML_ETHERNET_TCC       35
153 #define JUNIPER_IFML_VLAN_TCC           36
154 #define JUNIPER_IFML_EXTENDED_VLAN_TCC  37
155 #define JUNIPER_IFML_CONTROLLER         38
156 #define JUNIPER_IFML_MFR                39
157 #define JUNIPER_IFML_LS                 40
158 #define JUNIPER_IFML_ETHERNET_VPLS      41
159 #define JUNIPER_IFML_ETHERNET_VLAN_VPLS 42
160 #define JUNIPER_IFML_ETHERNET_EXTENDED_VLAN_VPLS 43
161 #define JUNIPER_IFML_LT                 44
162 #define JUNIPER_IFML_SERVICES           45
163 #define JUNIPER_IFML_ETHER_VPLS_OVER_ATM 46
164 #define JUNIPER_IFML_FR_PORT_CCC        47
165 #define JUNIPER_IFML_FRAMERELAY_EXT_CCC 48
166 #define JUNIPER_IFML_FRAMERELAY_EXT_TCC 49
167 #define JUNIPER_IFML_FRAMERELAY_FLEX    50
168 #define JUNIPER_IFML_GGSNI              51
169 #define JUNIPER_IFML_ETHERNET_FLEX      52
170 #define JUNIPER_IFML_COLLECTOR          53
171 #define JUNIPER_IFML_AGGREGATOR         54
172 #define JUNIPER_IFML_LAPD               55
173 #define JUNIPER_IFML_PPPOE              56
174 #define JUNIPER_IFML_PPP_SUBORDINATE    57
175 #define JUNIPER_IFML_CISCOHDLC_SUBORDINATE  58
176 #define JUNIPER_IFML_DFC                59
177 #define JUNIPER_IFML_PICPEER            60
178 
179 static const struct tok juniper_ifmt_values[] = {
180     { JUNIPER_IFML_ETHER, "Ethernet" },
181     { JUNIPER_IFML_FDDI, "FDDI" },
182     { JUNIPER_IFML_TOKENRING, "Token-Ring" },
183     { JUNIPER_IFML_PPP, "PPP" },
184     { JUNIPER_IFML_PPP_SUBORDINATE, "PPP-Subordinate" },
185     { JUNIPER_IFML_FRAMERELAY, "Frame-Relay" },
186     { JUNIPER_IFML_CISCOHDLC, "Cisco-HDLC" },
187     { JUNIPER_IFML_SMDSDXI, "SMDS-DXI" },
188     { JUNIPER_IFML_ATMPVC, "ATM-PVC" },
189     { JUNIPER_IFML_PPP_CCC, "PPP-CCC" },
190     { JUNIPER_IFML_FRAMERELAY_CCC, "Frame-Relay-CCC" },
191     { JUNIPER_IFML_FRAMERELAY_EXT_CCC, "Extended FR-CCC" },
192     { JUNIPER_IFML_IPIP, "IP-over-IP" },
193     { JUNIPER_IFML_GRE, "GRE" },
194     { JUNIPER_IFML_PIM, "PIM-Encapsulator" },
195     { JUNIPER_IFML_PIMD, "PIM-Decapsulator" },
196     { JUNIPER_IFML_CISCOHDLC_CCC, "Cisco-HDLC-CCC" },
197     { JUNIPER_IFML_VLAN_CCC, "VLAN-CCC" },
198     { JUNIPER_IFML_EXTENDED_VLAN_CCC, "Extended-VLAN-CCC" },
199     { JUNIPER_IFML_MLPPP, "Multilink-PPP" },
200     { JUNIPER_IFML_MLFR, "Multilink-FR" },
201     { JUNIPER_IFML_MFR, "Multilink-FR-UNI-NNI" },
202     { JUNIPER_IFML_ML, "Multilink" },
203     { JUNIPER_IFML_LS, "LinkService" },
204     { JUNIPER_IFML_LSI, "LSI" },
205     { JUNIPER_IFML_ATM_CELLRELAY_CCC, "ATM-CCC-Cell-Relay" },
206     { JUNIPER_IFML_CRYPTO, "IPSEC-over-IP" },
207     { JUNIPER_IFML_GGSN, "GGSN" },
208     { JUNIPER_IFML_PPP_TCC, "PPP-TCC" },
209     { JUNIPER_IFML_FRAMERELAY_TCC, "Frame-Relay-TCC" },
210     { JUNIPER_IFML_FRAMERELAY_EXT_TCC, "Extended FR-TCC" },
211     { JUNIPER_IFML_CISCOHDLC_TCC, "Cisco-HDLC-TCC" },
212     { JUNIPER_IFML_ETHERNET_CCC, "Ethernet-CCC" },
213     { JUNIPER_IFML_VT, "VPN-Loopback-tunnel" },
214     { JUNIPER_IFML_ETHER_OVER_ATM, "Ethernet-over-ATM" },
215     { JUNIPER_IFML_ETHER_VPLS_OVER_ATM, "Ethernet-VPLS-over-ATM" },
216     { JUNIPER_IFML_MONITOR, "Monitor" },
217     { JUNIPER_IFML_ETHERNET_TCC, "Ethernet-TCC" },
218     { JUNIPER_IFML_VLAN_TCC, "VLAN-TCC" },
219     { JUNIPER_IFML_EXTENDED_VLAN_TCC, "Extended-VLAN-TCC" },
220     { JUNIPER_IFML_CONTROLLER, "Controller" },
221     { JUNIPER_IFML_ETHERNET_VPLS, "VPLS" },
222     { JUNIPER_IFML_ETHERNET_VLAN_VPLS, "VLAN-VPLS" },
223     { JUNIPER_IFML_ETHERNET_EXTENDED_VLAN_VPLS, "Extended-VLAN-VPLS" },
224     { JUNIPER_IFML_LT, "Logical-tunnel" },
225     { JUNIPER_IFML_SERVICES, "General-Services" },
226     { JUNIPER_IFML_PPPOE, "PPPoE" },
227     { JUNIPER_IFML_ETHERNET_FLEX, "Flexible-Ethernet-Services" },
228     { JUNIPER_IFML_FRAMERELAY_FLEX, "Flexible-FrameRelay" },
229     { JUNIPER_IFML_COLLECTOR, "Flow-collection" },
230     { JUNIPER_IFML_PICPEER, "PIC Peer" },
231     { JUNIPER_IFML_DFC, "Dynamic-Flow-Capture" },
232     {0,                    NULL}
233 };
234 
235 #define JUNIPER_IFLE_ATM_SNAP           2
236 #define JUNIPER_IFLE_ATM_NLPID          3
237 #define JUNIPER_IFLE_ATM_VCMUX          4
238 #define JUNIPER_IFLE_ATM_LLC            5
239 #define JUNIPER_IFLE_ATM_PPP_VCMUX      6
240 #define JUNIPER_IFLE_ATM_PPP_LLC        7
241 #define JUNIPER_IFLE_ATM_PPP_FUNI       8
242 #define JUNIPER_IFLE_ATM_CCC            9
243 #define JUNIPER_IFLE_FR_NLPID           10
244 #define JUNIPER_IFLE_FR_SNAP            11
245 #define JUNIPER_IFLE_FR_PPP             12
246 #define JUNIPER_IFLE_FR_CCC             13
247 #define JUNIPER_IFLE_ENET2              14
248 #define JUNIPER_IFLE_IEEE8023_SNAP      15
249 #define JUNIPER_IFLE_IEEE8023_LLC       16
250 #define JUNIPER_IFLE_PPP                17
251 #define JUNIPER_IFLE_CISCOHDLC          18
252 #define JUNIPER_IFLE_PPP_CCC            19
253 #define JUNIPER_IFLE_IPIP_NULL          20
254 #define JUNIPER_IFLE_PIM_NULL           21
255 #define JUNIPER_IFLE_GRE_NULL           22
256 #define JUNIPER_IFLE_GRE_PPP            23
257 #define JUNIPER_IFLE_PIMD_DECAPS        24
258 #define JUNIPER_IFLE_CISCOHDLC_CCC      25
259 #define JUNIPER_IFLE_ATM_CISCO_NLPID    26
260 #define JUNIPER_IFLE_VLAN_CCC           27
261 #define JUNIPER_IFLE_MLPPP              28
262 #define JUNIPER_IFLE_MLFR               29
263 #define JUNIPER_IFLE_LSI_NULL           30
264 #define JUNIPER_IFLE_AGGREGATE_UNUSED   31
265 #define JUNIPER_IFLE_ATM_CELLRELAY_CCC  32
266 #define JUNIPER_IFLE_CRYPTO             33
267 #define JUNIPER_IFLE_GGSN               34
268 #define JUNIPER_IFLE_ATM_TCC            35
269 #define JUNIPER_IFLE_FR_TCC             36
270 #define JUNIPER_IFLE_PPP_TCC            37
271 #define JUNIPER_IFLE_CISCOHDLC_TCC      38
272 #define JUNIPER_IFLE_ETHERNET_CCC       39
273 #define JUNIPER_IFLE_VT                 40
274 #define JUNIPER_IFLE_ATM_EOA_LLC        41
275 #define JUNIPER_IFLE_EXTENDED_VLAN_CCC          42
276 #define JUNIPER_IFLE_ATM_SNAP_TCC       43
277 #define JUNIPER_IFLE_MONITOR            44
278 #define JUNIPER_IFLE_ETHERNET_TCC       45
279 #define JUNIPER_IFLE_VLAN_TCC           46
280 #define JUNIPER_IFLE_EXTENDED_VLAN_TCC  47
281 #define JUNIPER_IFLE_MFR                48
282 #define JUNIPER_IFLE_ETHERNET_VPLS      49
283 #define JUNIPER_IFLE_ETHERNET_VLAN_VPLS 50
284 #define JUNIPER_IFLE_ETHERNET_EXTENDED_VLAN_VPLS 51
285 #define JUNIPER_IFLE_SERVICES           52
286 #define JUNIPER_IFLE_ATM_ETHER_VPLS_ATM_LLC                53
287 #define JUNIPER_IFLE_FR_PORT_CCC        54
288 #define JUNIPER_IFLE_ATM_MLPPP_LLC      55
289 #define JUNIPER_IFLE_ATM_EOA_CCC        56
290 #define JUNIPER_IFLE_LT_VLAN            57
291 #define JUNIPER_IFLE_COLLECTOR          58
292 #define JUNIPER_IFLE_AGGREGATOR         59
293 #define JUNIPER_IFLE_LAPD               60
294 #define JUNIPER_IFLE_ATM_PPPOE_LLC          61
295 #define JUNIPER_IFLE_ETHERNET_PPPOE         62
296 #define JUNIPER_IFLE_PPPOE                  63
297 #define JUNIPER_IFLE_PPP_SUBORDINATE        64
298 #define JUNIPER_IFLE_CISCOHDLC_SUBORDINATE  65
299 #define JUNIPER_IFLE_DFC                    66
300 #define JUNIPER_IFLE_PICPEER                67
301 
302 static const struct tok juniper_ifle_values[] = {
303     { JUNIPER_IFLE_AGGREGATOR, "Aggregator" },
304     { JUNIPER_IFLE_ATM_CCC, "CCC over ATM" },
305     { JUNIPER_IFLE_ATM_CELLRELAY_CCC, "ATM CCC Cell Relay" },
306     { JUNIPER_IFLE_ATM_CISCO_NLPID, "CISCO compatible NLPID" },
307     { JUNIPER_IFLE_ATM_EOA_CCC, "Ethernet over ATM CCC" },
308     { JUNIPER_IFLE_ATM_EOA_LLC, "Ethernet over ATM LLC" },
309     { JUNIPER_IFLE_ATM_ETHER_VPLS_ATM_LLC, "Ethernet VPLS over ATM LLC" },
310     { JUNIPER_IFLE_ATM_LLC, "ATM LLC" },
311     { JUNIPER_IFLE_ATM_MLPPP_LLC, "MLPPP over ATM LLC" },
312     { JUNIPER_IFLE_ATM_NLPID, "ATM NLPID" },
313     { JUNIPER_IFLE_ATM_PPPOE_LLC, "PPPoE over ATM LLC" },
314     { JUNIPER_IFLE_ATM_PPP_FUNI, "PPP over FUNI" },
315     { JUNIPER_IFLE_ATM_PPP_LLC, "PPP over ATM LLC" },
316     { JUNIPER_IFLE_ATM_PPP_VCMUX, "PPP over ATM VCMUX" },
317     { JUNIPER_IFLE_ATM_SNAP, "ATM SNAP" },
318     { JUNIPER_IFLE_ATM_SNAP_TCC, "ATM SNAP TCC" },
319     { JUNIPER_IFLE_ATM_TCC, "ATM VCMUX TCC" },
320     { JUNIPER_IFLE_ATM_VCMUX, "ATM VCMUX" },
321     { JUNIPER_IFLE_CISCOHDLC, "C-HDLC" },
322     { JUNIPER_IFLE_CISCOHDLC_CCC, "C-HDLC CCC" },
323     { JUNIPER_IFLE_CISCOHDLC_SUBORDINATE, "C-HDLC via dialer" },
324     { JUNIPER_IFLE_CISCOHDLC_TCC, "C-HDLC TCC" },
325     { JUNIPER_IFLE_COLLECTOR, "Collector" },
326     { JUNIPER_IFLE_CRYPTO, "Crypto" },
327     { JUNIPER_IFLE_ENET2, "Ethernet" },
328     { JUNIPER_IFLE_ETHERNET_CCC, "Ethernet CCC" },
329     { JUNIPER_IFLE_ETHERNET_EXTENDED_VLAN_VPLS, "Extended VLAN VPLS" },
330     { JUNIPER_IFLE_ETHERNET_PPPOE, "PPPoE over Ethernet" },
331     { JUNIPER_IFLE_ETHERNET_TCC, "Ethernet TCC" },
332     { JUNIPER_IFLE_ETHERNET_VLAN_VPLS, "VLAN VPLS" },
333     { JUNIPER_IFLE_ETHERNET_VPLS, "VPLS" },
334     { JUNIPER_IFLE_EXTENDED_VLAN_CCC, "Extended VLAN CCC" },
335     { JUNIPER_IFLE_EXTENDED_VLAN_TCC, "Extended VLAN TCC" },
336     { JUNIPER_IFLE_FR_CCC, "FR CCC" },
337     { JUNIPER_IFLE_FR_NLPID, "FR NLPID" },
338     { JUNIPER_IFLE_FR_PORT_CCC, "FR CCC" },
339     { JUNIPER_IFLE_FR_PPP, "FR PPP" },
340     { JUNIPER_IFLE_FR_SNAP, "FR SNAP" },
341     { JUNIPER_IFLE_FR_TCC, "FR TCC" },
342     { JUNIPER_IFLE_GGSN, "GGSN" },
343     { JUNIPER_IFLE_GRE_NULL, "GRE NULL" },
344     { JUNIPER_IFLE_GRE_PPP, "PPP over GRE" },
345     { JUNIPER_IFLE_IPIP_NULL, "IPIP" },
346     { JUNIPER_IFLE_LAPD, "LAPD" },
347     { JUNIPER_IFLE_LSI_NULL, "LSI Null" },
348     { JUNIPER_IFLE_LT_VLAN, "LT VLAN" },
349     { JUNIPER_IFLE_MFR, "MFR" },
350     { JUNIPER_IFLE_MLFR, "MLFR" },
351     { JUNIPER_IFLE_MLPPP, "MLPPP" },
352     { JUNIPER_IFLE_MONITOR, "Monitor" },
353     { JUNIPER_IFLE_PIMD_DECAPS, "PIMd" },
354     { JUNIPER_IFLE_PIM_NULL, "PIM Null" },
355     { JUNIPER_IFLE_PPP, "PPP" },
356     { JUNIPER_IFLE_PPPOE, "PPPoE" },
357     { JUNIPER_IFLE_PPP_CCC, "PPP CCC" },
358     { JUNIPER_IFLE_PPP_SUBORDINATE, "" },
359     { JUNIPER_IFLE_PPP_TCC, "PPP TCC" },
360     { JUNIPER_IFLE_SERVICES, "General Services" },
361     { JUNIPER_IFLE_VLAN_CCC, "VLAN CCC" },
362     { JUNIPER_IFLE_VLAN_TCC, "VLAN TCC" },
363     { JUNIPER_IFLE_VT, "VT" },
364     {0,                    NULL}
365 };
366 
367 struct juniper_cookie_table_t {
368     uint32_t pictype;		/* pic type */
369     uint8_t  cookie_len;       /* cookie len */
370     const char *s;		/* pic name */
371 };
372 
373 static const struct juniper_cookie_table_t juniper_cookie_table[] = {
374 #ifdef DLT_JUNIPER_ATM1
375     { DLT_JUNIPER_ATM1,  4, "ATM1"},
376 #endif
377 #ifdef DLT_JUNIPER_ATM2
378     { DLT_JUNIPER_ATM2,  8, "ATM2"},
379 #endif
380 #ifdef DLT_JUNIPER_MLPPP
381     { DLT_JUNIPER_MLPPP, 2, "MLPPP"},
382 #endif
383 #ifdef DLT_JUNIPER_MLFR
384     { DLT_JUNIPER_MLFR,  2, "MLFR"},
385 #endif
386 #ifdef DLT_JUNIPER_MFR
387     { DLT_JUNIPER_MFR,   4, "MFR"},
388 #endif
389 #ifdef DLT_JUNIPER_PPPOE
390     { DLT_JUNIPER_PPPOE, 0, "PPPoE"},
391 #endif
392 #ifdef DLT_JUNIPER_PPPOE_ATM
393     { DLT_JUNIPER_PPPOE_ATM, 0, "PPPoE ATM"},
394 #endif
395 #ifdef DLT_JUNIPER_GGSN
396     { DLT_JUNIPER_GGSN, 8, "GGSN"},
397 #endif
398 #ifdef DLT_JUNIPER_MONITOR
399     { DLT_JUNIPER_MONITOR, 8, "MONITOR"},
400 #endif
401 #ifdef DLT_JUNIPER_SERVICES
402     { DLT_JUNIPER_SERVICES, 8, "AS"},
403 #endif
404 #ifdef DLT_JUNIPER_ES
405     { DLT_JUNIPER_ES, 0, "ES"},
406 #endif
407     { 0, 0, NULL }
408 };
409 
410 struct juniper_l2info_t {
411     uint32_t length;
412     uint32_t caplen;
413     uint32_t pictype;
414     uint8_t direction;
415     uint8_t header_len;
416     uint8_t cookie_len;
417     uint8_t cookie_type;
418     uint8_t cookie[8];
419     uint8_t bundle;
420     uint16_t proto;
421     uint8_t flags;
422 };
423 
424 #define LS_COOKIE_ID            0x54
425 #define AS_COOKIE_ID            0x47
426 #define LS_MLFR_COOKIE_LEN	4
427 #define ML_MLFR_COOKIE_LEN	2
428 #define LS_MFR_COOKIE_LEN	6
429 #define ATM1_COOKIE_LEN         4
430 #define ATM2_COOKIE_LEN         8
431 
432 #define ATM2_PKT_TYPE_MASK  0x70
433 #define ATM2_GAP_COUNT_MASK 0x3F
434 
435 #define JUNIPER_PROTO_NULL          1
436 #define JUNIPER_PROTO_IPV4          2
437 #define JUNIPER_PROTO_IPV6          6
438 
439 #define MFR_BE_MASK 0xc0
440 
441 static const struct tok juniper_protocol_values[] = {
442     { JUNIPER_PROTO_NULL, "Null" },
443     { JUNIPER_PROTO_IPV4, "IPv4" },
444     { JUNIPER_PROTO_IPV6, "IPv6" },
445     { 0, NULL}
446 };
447 
448 static int ip_heuristic_guess(netdissect_options *, register const u_char *, u_int);
449 static int juniper_ppp_heuristic_guess(netdissect_options *, register const u_char *, u_int);
450 static int juniper_parse_header(netdissect_options *, const u_char *, const struct pcap_pkthdr *, struct juniper_l2info_t *);
451 
452 #ifdef DLT_JUNIPER_GGSN
453 u_int
juniper_ggsn_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)454 juniper_ggsn_print(netdissect_options *ndo,
455                    const struct pcap_pkthdr *h, register const u_char *p)
456 {
457         struct juniper_l2info_t l2info;
458         struct juniper_ggsn_header {
459             uint8_t svc_id;
460             uint8_t flags_len;
461             uint8_t proto;
462             uint8_t flags;
463             uint8_t vlan_id[2];
464             uint8_t res[2];
465         };
466         const struct juniper_ggsn_header *gh;
467 
468         l2info.pictype = DLT_JUNIPER_GGSN;
469         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
470             return l2info.header_len;
471 
472         p+=l2info.header_len;
473         gh = (struct juniper_ggsn_header *)&l2info.cookie;
474 
475         if (ndo->ndo_eflag) {
476             ND_PRINT((ndo, "proto %s (%u), vlan %u: ",
477                    tok2str(juniper_protocol_values,"Unknown",gh->proto),
478                    gh->proto,
479                    EXTRACT_16BITS(&gh->vlan_id[0])));
480         }
481 
482         switch (gh->proto) {
483         case JUNIPER_PROTO_IPV4:
484             ip_print(ndo, p, l2info.length);
485             break;
486         case JUNIPER_PROTO_IPV6:
487             ip6_print(ndo, p, l2info.length);
488             break;
489         default:
490             if (!ndo->ndo_eflag)
491                 ND_PRINT((ndo, "unknown GGSN proto (%u)", gh->proto));
492         }
493 
494         return l2info.header_len;
495 }
496 #endif
497 
498 #ifdef DLT_JUNIPER_ES
499 u_int
juniper_es_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)500 juniper_es_print(netdissect_options *ndo,
501                  const struct pcap_pkthdr *h, register const u_char *p)
502 {
503         struct juniper_l2info_t l2info;
504         struct juniper_ipsec_header {
505             uint8_t sa_index[2];
506             uint8_t ttl;
507             uint8_t type;
508             uint8_t spi[4];
509             uint8_t src_ip[4];
510             uint8_t dst_ip[4];
511         };
512         u_int rewrite_len,es_type_bundle;
513         const struct juniper_ipsec_header *ih;
514 
515         l2info.pictype = DLT_JUNIPER_ES;
516         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
517             return l2info.header_len;
518 
519         p+=l2info.header_len;
520         ih = (const struct juniper_ipsec_header *)p;
521 
522         switch (ih->type) {
523         case JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE:
524         case JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE:
525             rewrite_len = 0;
526             es_type_bundle = 1;
527             break;
528         case JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE:
529         case JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE:
530         case JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE:
531             rewrite_len = 16;
532             es_type_bundle = 0;
533             break;
534         default:
535             ND_PRINT((ndo, "ES Invalid type %u, length %u",
536                    ih->type,
537                    l2info.length));
538             return l2info.header_len;
539         }
540 
541         l2info.length-=rewrite_len;
542         p+=rewrite_len;
543 
544         if (ndo->ndo_eflag) {
545             if (!es_type_bundle) {
546                 ND_PRINT((ndo, "ES SA, index %u, ttl %u type %s (%u), spi %u, Tunnel %s > %s, length %u\n",
547                        EXTRACT_16BITS(&ih->sa_index),
548                        ih->ttl,
549                        tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
550                        ih->type,
551                        EXTRACT_32BITS(&ih->spi),
552                        ipaddr_string(ndo, &ih->src_ip),
553                        ipaddr_string(ndo, &ih->dst_ip),
554                        l2info.length));
555             } else {
556                 ND_PRINT((ndo, "ES SA, index %u, ttl %u type %s (%u), length %u\n",
557                        EXTRACT_16BITS(&ih->sa_index),
558                        ih->ttl,
559                        tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
560                        ih->type,
561                        l2info.length));
562             }
563         }
564 
565         ip_print(ndo, p, l2info.length);
566         return l2info.header_len;
567 }
568 #endif
569 
570 #ifdef DLT_JUNIPER_MONITOR
571 u_int
juniper_monitor_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)572 juniper_monitor_print(netdissect_options *ndo,
573                       const struct pcap_pkthdr *h, register const u_char *p)
574 {
575         struct juniper_l2info_t l2info;
576         struct juniper_monitor_header {
577             uint8_t pkt_type;
578             uint8_t padding;
579             uint8_t iif[2];
580             uint8_t service_id[4];
581         };
582         const struct juniper_monitor_header *mh;
583 
584         l2info.pictype = DLT_JUNIPER_MONITOR;
585         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
586             return l2info.header_len;
587 
588         p+=l2info.header_len;
589         mh = (const struct juniper_monitor_header *)p;
590 
591         if (ndo->ndo_eflag)
592             ND_PRINT((ndo, "service-id %u, iif %u, pkt-type %u: ",
593                    EXTRACT_32BITS(&mh->service_id),
594                    EXTRACT_16BITS(&mh->iif),
595                    mh->pkt_type));
596 
597         /* no proto field - lets guess by first byte of IP header*/
598         ip_heuristic_guess (ndo, p, l2info.length);
599 
600         return l2info.header_len;
601 }
602 #endif
603 
604 #ifdef DLT_JUNIPER_SERVICES
605 u_int
juniper_services_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)606 juniper_services_print(netdissect_options *ndo,
607                        const struct pcap_pkthdr *h, register const u_char *p)
608 {
609         struct juniper_l2info_t l2info;
610         struct juniper_services_header {
611             uint8_t svc_id;
612             uint8_t flags_len;
613             uint8_t svc_set_id[2];
614             uint8_t dir_iif[4];
615         };
616         const struct juniper_services_header *sh;
617 
618         l2info.pictype = DLT_JUNIPER_SERVICES;
619         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
620             return l2info.header_len;
621 
622         p+=l2info.header_len;
623         sh = (const struct juniper_services_header *)p;
624 
625         if (ndo->ndo_eflag)
626             ND_PRINT((ndo, "service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
627                    sh->svc_id,
628                    sh->flags_len,
629                    EXTRACT_16BITS(&sh->svc_set_id),
630                    EXTRACT_24BITS(&sh->dir_iif[1])));
631 
632         /* no proto field - lets guess by first byte of IP header*/
633         ip_heuristic_guess (ndo, p, l2info.length);
634 
635         return l2info.header_len;
636 }
637 #endif
638 
639 #ifdef DLT_JUNIPER_PPPOE
640 u_int
juniper_pppoe_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)641 juniper_pppoe_print(netdissect_options *ndo,
642                     const struct pcap_pkthdr *h, register const u_char *p)
643 {
644         struct juniper_l2info_t l2info;
645 
646         l2info.pictype = DLT_JUNIPER_PPPOE;
647         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
648             return l2info.header_len;
649 
650         p+=l2info.header_len;
651         /* this DLT contains nothing but raw ethernet frames */
652         ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
653         return l2info.header_len;
654 }
655 #endif
656 
657 #ifdef DLT_JUNIPER_ETHER
658 u_int
juniper_ether_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)659 juniper_ether_print(netdissect_options *ndo,
660                     const struct pcap_pkthdr *h, register const u_char *p)
661 {
662         struct juniper_l2info_t l2info;
663 
664         l2info.pictype = DLT_JUNIPER_ETHER;
665         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
666             return l2info.header_len;
667 
668         p+=l2info.header_len;
669         /* this DLT contains nothing but raw Ethernet frames */
670         ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
671         return l2info.header_len;
672 }
673 #endif
674 
675 #ifdef DLT_JUNIPER_PPP
676 u_int
juniper_ppp_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)677 juniper_ppp_print(netdissect_options *ndo,
678                   const struct pcap_pkthdr *h, register const u_char *p)
679 {
680         struct juniper_l2info_t l2info;
681 
682         l2info.pictype = DLT_JUNIPER_PPP;
683         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
684             return l2info.header_len;
685 
686         p+=l2info.header_len;
687         /* this DLT contains nothing but raw ppp frames */
688         ppp_print(ndo, p, l2info.length);
689         return l2info.header_len;
690 }
691 #endif
692 
693 #ifdef DLT_JUNIPER_FRELAY
694 u_int
juniper_frelay_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)695 juniper_frelay_print(netdissect_options *ndo,
696                      const struct pcap_pkthdr *h, register const u_char *p)
697 {
698         struct juniper_l2info_t l2info;
699 
700         l2info.pictype = DLT_JUNIPER_FRELAY;
701         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
702             return l2info.header_len;
703 
704         p+=l2info.header_len;
705         /* this DLT contains nothing but raw frame-relay frames */
706         fr_print(ndo, p, l2info.length);
707         return l2info.header_len;
708 }
709 #endif
710 
711 #ifdef DLT_JUNIPER_CHDLC
712 u_int
juniper_chdlc_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)713 juniper_chdlc_print(netdissect_options *ndo,
714                     const struct pcap_pkthdr *h, register const u_char *p)
715 {
716         struct juniper_l2info_t l2info;
717 
718         l2info.pictype = DLT_JUNIPER_CHDLC;
719         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
720             return l2info.header_len;
721 
722         p+=l2info.header_len;
723         /* this DLT contains nothing but raw c-hdlc frames */
724         chdlc_print(ndo, p, l2info.length);
725         return l2info.header_len;
726 }
727 #endif
728 
729 #ifdef DLT_JUNIPER_PPPOE_ATM
730 u_int
juniper_pppoe_atm_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)731 juniper_pppoe_atm_print(netdissect_options *ndo,
732                         const struct pcap_pkthdr *h, register const u_char *p)
733 {
734         struct juniper_l2info_t l2info;
735 	uint16_t extracted_ethertype;
736 
737         l2info.pictype = DLT_JUNIPER_PPPOE_ATM;
738         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
739             return l2info.header_len;
740 
741         p+=l2info.header_len;
742 
743         extracted_ethertype = EXTRACT_16BITS(p);
744         /* this DLT contains nothing but raw PPPoE frames,
745          * prepended with a type field*/
746         if (ethertype_print(ndo, extracted_ethertype,
747                               p+ETHERTYPE_LEN,
748                               l2info.length-ETHERTYPE_LEN,
749                               l2info.caplen-ETHERTYPE_LEN,
750                               NULL, NULL) == 0)
751             /* ether_type not known, probably it wasn't one */
752             ND_PRINT((ndo, "unknown ethertype 0x%04x", extracted_ethertype));
753 
754         return l2info.header_len;
755 }
756 #endif
757 
758 #ifdef DLT_JUNIPER_MLPPP
759 u_int
juniper_mlppp_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)760 juniper_mlppp_print(netdissect_options *ndo,
761                     const struct pcap_pkthdr *h, register const u_char *p)
762 {
763         struct juniper_l2info_t l2info;
764 
765         l2info.pictype = DLT_JUNIPER_MLPPP;
766         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
767             return l2info.header_len;
768 
769         /* suppress Bundle-ID if frame was captured on a child-link
770          * best indicator if the cookie looks like a proto */
771         if (ndo->ndo_eflag &&
772             EXTRACT_16BITS(&l2info.cookie) != PPP_OSI &&
773             EXTRACT_16BITS(&l2info.cookie) !=  (PPP_ADDRESS << 8 | PPP_CONTROL))
774             ND_PRINT((ndo, "Bundle-ID %u: ", l2info.bundle));
775 
776         p+=l2info.header_len;
777 
778         /* first try the LSQ protos */
779         switch(l2info.proto) {
780         case JUNIPER_LSQ_L3_PROTO_IPV4:
781             /* IP traffic going to the RE would not have a cookie
782              * -> this must be incoming IS-IS over PPP
783              */
784             if (l2info.cookie[4] == (JUNIPER_LSQ_COOKIE_RE|JUNIPER_LSQ_COOKIE_DIR))
785                 ppp_print(ndo, p, l2info.length);
786             else
787                 ip_print(ndo, p, l2info.length);
788             return l2info.header_len;
789         case JUNIPER_LSQ_L3_PROTO_IPV6:
790             ip6_print(ndo, p,l2info.length);
791             return l2info.header_len;
792         case JUNIPER_LSQ_L3_PROTO_MPLS:
793             mpls_print(ndo, p, l2info.length);
794             return l2info.header_len;
795         case JUNIPER_LSQ_L3_PROTO_ISO:
796             isoclns_print(ndo, p, l2info.length, l2info.caplen);
797             return l2info.header_len;
798         default:
799             break;
800         }
801 
802         /* zero length cookie ? */
803         switch (EXTRACT_16BITS(&l2info.cookie)) {
804         case PPP_OSI:
805             ppp_print(ndo, p - 2, l2info.length + 2);
806             break;
807         case (PPP_ADDRESS << 8 | PPP_CONTROL): /* fall through */
808         default:
809             ppp_print(ndo, p, l2info.length);
810             break;
811         }
812 
813         return l2info.header_len;
814 }
815 #endif
816 
817 
818 #ifdef DLT_JUNIPER_MFR
819 u_int
juniper_mfr_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)820 juniper_mfr_print(netdissect_options *ndo,
821                   const struct pcap_pkthdr *h, register const u_char *p)
822 {
823         struct juniper_l2info_t l2info;
824 
825         memset(&l2info, 0, sizeof(l2info));
826         l2info.pictype = DLT_JUNIPER_MFR;
827         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
828             return l2info.header_len;
829 
830         p+=l2info.header_len;
831 
832         /* child-link ? */
833         if (l2info.cookie_len == 0) {
834             mfr_print(ndo, p, l2info.length);
835             return l2info.header_len;
836         }
837 
838         /* first try the LSQ protos */
839         if (l2info.cookie_len == AS_PIC_COOKIE_LEN) {
840             switch(l2info.proto) {
841             case JUNIPER_LSQ_L3_PROTO_IPV4:
842                 ip_print(ndo, p, l2info.length);
843                 return l2info.header_len;
844             case JUNIPER_LSQ_L3_PROTO_IPV6:
845                 ip6_print(ndo, p,l2info.length);
846                 return l2info.header_len;
847             case JUNIPER_LSQ_L3_PROTO_MPLS:
848                 mpls_print(ndo, p, l2info.length);
849                 return l2info.header_len;
850             case JUNIPER_LSQ_L3_PROTO_ISO:
851                 isoclns_print(ndo, p, l2info.length, l2info.caplen);
852                 return l2info.header_len;
853             default:
854                 break;
855             }
856             return l2info.header_len;
857         }
858 
859         /* suppress Bundle-ID if frame was captured on a child-link */
860         if (ndo->ndo_eflag && EXTRACT_32BITS(l2info.cookie) != 1)
861             ND_PRINT((ndo, "Bundle-ID %u, ", l2info.bundle));
862         switch (l2info.proto) {
863         case (LLCSAP_ISONS<<8 | LLCSAP_ISONS):
864             isoclns_print(ndo, p + 1, l2info.length - 1, l2info.caplen - 1);
865             break;
866         case (LLC_UI<<8 | NLPID_Q933):
867         case (LLC_UI<<8 | NLPID_IP):
868         case (LLC_UI<<8 | NLPID_IP6):
869             /* pass IP{4,6} to the OSI layer for proper link-layer printing */
870             isoclns_print(ndo, p - 1, l2info.length + 1, l2info.caplen + 1);
871             break;
872         default:
873             ND_PRINT((ndo, "unknown protocol 0x%04x, length %u", l2info.proto, l2info.length));
874         }
875 
876         return l2info.header_len;
877 }
878 #endif
879 
880 #ifdef DLT_JUNIPER_MLFR
881 u_int
juniper_mlfr_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)882 juniper_mlfr_print(netdissect_options *ndo,
883                    const struct pcap_pkthdr *h, register const u_char *p)
884 {
885         struct juniper_l2info_t l2info;
886 
887         l2info.pictype = DLT_JUNIPER_MLFR;
888         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
889             return l2info.header_len;
890 
891         p+=l2info.header_len;
892 
893         /* suppress Bundle-ID if frame was captured on a child-link */
894         if (ndo->ndo_eflag && EXTRACT_32BITS(l2info.cookie) != 1)
895             ND_PRINT((ndo, "Bundle-ID %u, ", l2info.bundle));
896         switch (l2info.proto) {
897         case (LLC_UI):
898         case (LLC_UI<<8):
899             isoclns_print(ndo, p, l2info.length, l2info.caplen);
900             break;
901         case (LLC_UI<<8 | NLPID_Q933):
902         case (LLC_UI<<8 | NLPID_IP):
903         case (LLC_UI<<8 | NLPID_IP6):
904             /* pass IP{4,6} to the OSI layer for proper link-layer printing */
905             isoclns_print(ndo, p - 1, l2info.length + 1, l2info.caplen + 1);
906             break;
907         default:
908             ND_PRINT((ndo, "unknown protocol 0x%04x, length %u", l2info.proto, l2info.length));
909         }
910 
911         return l2info.header_len;
912 }
913 #endif
914 
915 /*
916  *     ATM1 PIC cookie format
917  *
918  *     +-----+-------------------------+-------------------------------+
919  *     |fmtid|     vc index            |  channel  ID                  |
920  *     +-----+-------------------------+-------------------------------+
921  */
922 
923 #ifdef DLT_JUNIPER_ATM1
924 u_int
juniper_atm1_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)925 juniper_atm1_print(netdissect_options *ndo,
926                    const struct pcap_pkthdr *h, register const u_char *p)
927 {
928         int llc_hdrlen;
929 
930         struct juniper_l2info_t l2info;
931 
932         l2info.pictype = DLT_JUNIPER_ATM1;
933         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
934             return l2info.header_len;
935 
936         p+=l2info.header_len;
937 
938         if (l2info.cookie[0] == 0x80) { /* OAM cell ? */
939             oam_print(ndo, p, l2info.length, ATM_OAM_NOHEC);
940             return l2info.header_len;
941         }
942 
943         if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
944             EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
945 
946             llc_hdrlen = llc_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
947             if (llc_hdrlen > 0)
948                 return l2info.header_len;
949         }
950 
951         if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
952             isoclns_print(ndo, p + 1, l2info.length - 1, l2info.caplen - 1);
953             /* FIXME check if frame was recognized */
954             return l2info.header_len;
955         }
956 
957         if (ip_heuristic_guess(ndo, p, l2info.length) != 0) /* last try - vcmux encaps ? */
958             return l2info.header_len;
959 
960 	return l2info.header_len;
961 }
962 #endif
963 
964 /*
965  *     ATM2 PIC cookie format
966  *
967  *     +-------------------------------+---------+---+-----+-----------+
968  *     |     channel ID                |  reserv |AAL| CCRQ| gap cnt   |
969  *     +-------------------------------+---------+---+-----+-----------+
970  */
971 
972 #ifdef DLT_JUNIPER_ATM2
973 u_int
juniper_atm2_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)974 juniper_atm2_print(netdissect_options *ndo,
975                    const struct pcap_pkthdr *h, register const u_char *p)
976 {
977         int llc_hdrlen;
978 
979         struct juniper_l2info_t l2info;
980 
981         l2info.pictype = DLT_JUNIPER_ATM2;
982         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
983             return l2info.header_len;
984 
985         p+=l2info.header_len;
986 
987         if (l2info.cookie[7] & ATM2_PKT_TYPE_MASK) { /* OAM cell ? */
988             oam_print(ndo, p, l2info.length, ATM_OAM_NOHEC);
989             return l2info.header_len;
990         }
991 
992         if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
993             EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
994 
995             llc_hdrlen = llc_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
996             if (llc_hdrlen > 0)
997                 return l2info.header_len;
998         }
999 
1000         if (l2info.direction != JUNIPER_BPF_PKT_IN && /* ether-over-1483 encaps ? */
1001             (EXTRACT_32BITS(l2info.cookie) & ATM2_GAP_COUNT_MASK)) {
1002             ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
1003             return l2info.header_len;
1004         }
1005 
1006         if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
1007             isoclns_print(ndo, p + 1, l2info.length - 1, l2info.caplen - 1);
1008             /* FIXME check if frame was recognized */
1009             return l2info.header_len;
1010         }
1011 
1012         if(juniper_ppp_heuristic_guess(ndo, p, l2info.length) != 0) /* PPPoA vcmux encaps ? */
1013             return l2info.header_len;
1014 
1015         if (ip_heuristic_guess(ndo, p, l2info.length) != 0) /* last try - vcmux encaps ? */
1016             return l2info.header_len;
1017 
1018 	return l2info.header_len;
1019 }
1020 #endif
1021 
1022 
1023 /* try to guess, based on all PPP protos that are supported in
1024  * a juniper router if the payload data is encapsulated using PPP */
1025 static int
juniper_ppp_heuristic_guess(netdissect_options * ndo,register const u_char * p,u_int length)1026 juniper_ppp_heuristic_guess(netdissect_options *ndo,
1027                             register const u_char *p, u_int length)
1028 {
1029     switch(EXTRACT_16BITS(p)) {
1030     case PPP_IP :
1031     case PPP_OSI :
1032     case PPP_MPLS_UCAST :
1033     case PPP_MPLS_MCAST :
1034     case PPP_IPCP :
1035     case PPP_OSICP :
1036     case PPP_MPLSCP :
1037     case PPP_LCP :
1038     case PPP_PAP :
1039     case PPP_CHAP :
1040     case PPP_ML :
1041     case PPP_IPV6 :
1042     case PPP_IPV6CP :
1043         ppp_print(ndo, p, length);
1044         break;
1045 
1046     default:
1047         return 0; /* did not find a ppp header */
1048         break;
1049     }
1050     return 1; /* we printed a ppp packet */
1051 }
1052 
1053 static int
ip_heuristic_guess(netdissect_options * ndo,register const u_char * p,u_int length)1054 ip_heuristic_guess(netdissect_options *ndo,
1055                    register const u_char *p, u_int length)
1056 {
1057     switch(p[0]) {
1058     case 0x45:
1059     case 0x46:
1060     case 0x47:
1061     case 0x48:
1062     case 0x49:
1063     case 0x4a:
1064     case 0x4b:
1065     case 0x4c:
1066     case 0x4d:
1067     case 0x4e:
1068     case 0x4f:
1069 	    ip_print(ndo, p, length);
1070 	    break;
1071     case 0x60:
1072     case 0x61:
1073     case 0x62:
1074     case 0x63:
1075     case 0x64:
1076     case 0x65:
1077     case 0x66:
1078     case 0x67:
1079     case 0x68:
1080     case 0x69:
1081     case 0x6a:
1082     case 0x6b:
1083     case 0x6c:
1084     case 0x6d:
1085     case 0x6e:
1086     case 0x6f:
1087         ip6_print(ndo, p, length);
1088         break;
1089     default:
1090         return 0; /* did not find a ip header */
1091         break;
1092     }
1093     return 1; /* we printed an v4/v6 packet */
1094 }
1095 
1096 static int
juniper_read_tlv_value(const u_char * p,u_int tlv_type,u_int tlv_len)1097 juniper_read_tlv_value(const u_char *p, u_int tlv_type, u_int tlv_len)
1098 {
1099    int tlv_value;
1100 
1101    /* TLVs < 128 are little endian encoded */
1102    if (tlv_type < 128) {
1103        switch (tlv_len) {
1104        case 1:
1105            tlv_value = *p;
1106            break;
1107        case 2:
1108            tlv_value = EXTRACT_LE_16BITS(p);
1109            break;
1110        case 3:
1111            tlv_value = EXTRACT_LE_24BITS(p);
1112            break;
1113        case 4:
1114            tlv_value = EXTRACT_LE_32BITS(p);
1115            break;
1116        default:
1117            tlv_value = -1;
1118            break;
1119        }
1120    } else {
1121        /* TLVs >= 128 are big endian encoded */
1122        switch (tlv_len) {
1123        case 1:
1124            tlv_value = *p;
1125            break;
1126        case 2:
1127            tlv_value = EXTRACT_16BITS(p);
1128            break;
1129        case 3:
1130            tlv_value = EXTRACT_24BITS(p);
1131            break;
1132        case 4:
1133            tlv_value = EXTRACT_32BITS(p);
1134            break;
1135        default:
1136            tlv_value = -1;
1137            break;
1138        }
1139    }
1140    return tlv_value;
1141 }
1142 
1143 static int
juniper_parse_header(netdissect_options * ndo,const u_char * p,const struct pcap_pkthdr * h,struct juniper_l2info_t * l2info)1144 juniper_parse_header(netdissect_options *ndo,
1145                      const u_char *p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info)
1146 {
1147     const struct juniper_cookie_table_t *lp = juniper_cookie_table;
1148     u_int idx, jnx_ext_len, jnx_header_len = 0;
1149     uint8_t tlv_type,tlv_len;
1150     uint32_t control_word;
1151     int tlv_value;
1152     const u_char *tptr;
1153 
1154 
1155     l2info->header_len = 0;
1156     l2info->cookie_len = 0;
1157     l2info->proto = 0;
1158 
1159 
1160     l2info->length = h->len;
1161     l2info->caplen = h->caplen;
1162     ND_TCHECK2(p[0], 4);
1163     l2info->flags = p[3];
1164     l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
1165 
1166     if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) { /* magic number found ? */
1167         ND_PRINT((ndo, "no magic-number found!"));
1168         return 0;
1169     }
1170 
1171     if (ndo->ndo_eflag) /* print direction */
1172         ND_PRINT((ndo, "%3s ", tok2str(juniper_direction_values, "---", l2info->direction)));
1173 
1174     /* magic number + flags */
1175     jnx_header_len = 4;
1176 
1177     if (ndo->ndo_vflag > 1)
1178         ND_PRINT((ndo, "\n\tJuniper PCAP Flags [%s]",
1179                bittok2str(jnx_flag_values, "none", l2info->flags)));
1180 
1181     /* extensions present ?  - calculate how much bytes to skip */
1182     if ((l2info->flags & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
1183 
1184         tptr = p+jnx_header_len;
1185 
1186         /* ok to read extension length ? */
1187         ND_TCHECK2(tptr[0], 2);
1188         jnx_ext_len = EXTRACT_16BITS(tptr);
1189         jnx_header_len += 2;
1190         tptr +=2;
1191 
1192         /* nail up the total length -
1193          * just in case something goes wrong
1194          * with TLV parsing */
1195         jnx_header_len += jnx_ext_len;
1196 
1197         if (ndo->ndo_vflag > 1)
1198             ND_PRINT((ndo, ", PCAP Extension(s) total length %u", jnx_ext_len));
1199 
1200         ND_TCHECK2(tptr[0], jnx_ext_len);
1201         while (jnx_ext_len > JUNIPER_EXT_TLV_OVERHEAD) {
1202             tlv_type = *(tptr++);
1203             tlv_len = *(tptr++);
1204             tlv_value = 0;
1205 
1206             /* sanity checks */
1207             if (tlv_type == 0 || tlv_len == 0)
1208                 break;
1209             if (tlv_len+JUNIPER_EXT_TLV_OVERHEAD > jnx_ext_len)
1210                 goto trunc;
1211 
1212             if (ndo->ndo_vflag > 1)
1213                 ND_PRINT((ndo, "\n\t  %s Extension TLV #%u, length %u, value ",
1214                        tok2str(jnx_ext_tlv_values,"Unknown",tlv_type),
1215                        tlv_type,
1216                        tlv_len));
1217 
1218             tlv_value = juniper_read_tlv_value(tptr, tlv_type, tlv_len);
1219             switch (tlv_type) {
1220             case JUNIPER_EXT_TLV_IFD_NAME:
1221                 /* FIXME */
1222                 break;
1223             case JUNIPER_EXT_TLV_IFD_MEDIATYPE:
1224             case JUNIPER_EXT_TLV_TTP_IFD_MEDIATYPE:
1225                 if (tlv_value != -1) {
1226                     if (ndo->ndo_vflag > 1)
1227                         ND_PRINT((ndo, "%s (%u)",
1228                                tok2str(juniper_ifmt_values, "Unknown", tlv_value),
1229                                tlv_value));
1230                 }
1231                 break;
1232             case JUNIPER_EXT_TLV_IFL_ENCAPS:
1233             case JUNIPER_EXT_TLV_TTP_IFL_ENCAPS:
1234                 if (tlv_value != -1) {
1235                     if (ndo->ndo_vflag > 1)
1236                         ND_PRINT((ndo, "%s (%u)",
1237                                tok2str(juniper_ifle_values, "Unknown", tlv_value),
1238                                tlv_value));
1239                 }
1240                 break;
1241             case JUNIPER_EXT_TLV_IFL_IDX: /* fall through */
1242             case JUNIPER_EXT_TLV_IFL_UNIT:
1243             case JUNIPER_EXT_TLV_IFD_IDX:
1244             default:
1245                 if (tlv_value != -1) {
1246                     if (ndo->ndo_vflag > 1)
1247                         ND_PRINT((ndo, "%u", tlv_value));
1248                 }
1249                 break;
1250             }
1251 
1252             tptr+=tlv_len;
1253             jnx_ext_len -= tlv_len+JUNIPER_EXT_TLV_OVERHEAD;
1254         }
1255 
1256         if (ndo->ndo_vflag > 1)
1257             ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
1258     }
1259 
1260     if ((l2info->flags & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
1261         if (ndo->ndo_eflag)
1262             ND_PRINT((ndo, "no-L2-hdr, "));
1263 
1264         /* there is no link-layer present -
1265          * perform the v4/v6 heuristics
1266          * to figure out what it is
1267          */
1268         ND_TCHECK2(p[jnx_header_len + 4], 1);
1269         if (ip_heuristic_guess(ndo, p + jnx_header_len + 4,
1270                                l2info->length - (jnx_header_len + 4)) == 0)
1271             ND_PRINT((ndo, "no IP-hdr found!"));
1272 
1273         l2info->header_len=jnx_header_len+4;
1274         return 0; /* stop parsing the output further */
1275 
1276     }
1277     l2info->header_len = jnx_header_len;
1278     p+=l2info->header_len;
1279     l2info->length -= l2info->header_len;
1280     l2info->caplen -= l2info->header_len;
1281 
1282     /* search through the cookie table and copy values matching for our PIC type */
1283     while (lp->s != NULL) {
1284         if (lp->pictype == l2info->pictype) {
1285 
1286             l2info->cookie_len += lp->cookie_len;
1287 
1288             switch (p[0]) {
1289             case LS_COOKIE_ID:
1290                 l2info->cookie_type = LS_COOKIE_ID;
1291                 l2info->cookie_len += 2;
1292                 break;
1293             case AS_COOKIE_ID:
1294                 l2info->cookie_type = AS_COOKIE_ID;
1295                 l2info->cookie_len = 8;
1296                 break;
1297 
1298             default:
1299                 l2info->bundle = l2info->cookie[0];
1300                 break;
1301             }
1302 
1303 
1304 #ifdef DLT_JUNIPER_MFR
1305             /* MFR child links don't carry cookies */
1306             if (l2info->pictype == DLT_JUNIPER_MFR &&
1307                 (p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
1308                 l2info->cookie_len = 0;
1309             }
1310 #endif
1311 
1312             l2info->header_len += l2info->cookie_len;
1313             l2info->length -= l2info->cookie_len;
1314             l2info->caplen -= l2info->cookie_len;
1315 
1316             if (ndo->ndo_eflag)
1317                 ND_PRINT((ndo, "%s-PIC, cookie-len %u",
1318                        lp->s,
1319                        l2info->cookie_len));
1320 
1321             if (l2info->cookie_len > 0) {
1322                 ND_TCHECK2(p[0], l2info->cookie_len);
1323                 if (ndo->ndo_eflag)
1324                     ND_PRINT((ndo, ", cookie 0x"));
1325                 for (idx = 0; idx < l2info->cookie_len; idx++) {
1326                     l2info->cookie[idx] = p[idx]; /* copy cookie data */
1327                     if (ndo->ndo_eflag) ND_PRINT((ndo, "%02x", p[idx]));
1328                 }
1329             }
1330 
1331             if (ndo->ndo_eflag) ND_PRINT((ndo, ": ")); /* print demarc b/w L2/L3*/
1332 
1333 
1334             l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
1335             break;
1336         }
1337         ++lp;
1338     }
1339     p+=l2info->cookie_len;
1340 
1341     /* DLT_ specific parsing */
1342     switch(l2info->pictype) {
1343 #ifdef DLT_JUNIPER_MLPPP
1344     case DLT_JUNIPER_MLPPP:
1345         switch (l2info->cookie_type) {
1346         case LS_COOKIE_ID:
1347             l2info->bundle = l2info->cookie[1];
1348             break;
1349         case AS_COOKIE_ID:
1350             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1351             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1352             break;
1353         default:
1354             l2info->bundle = l2info->cookie[0];
1355             break;
1356         }
1357         break;
1358 #endif
1359 #ifdef DLT_JUNIPER_MLFR
1360     case DLT_JUNIPER_MLFR:
1361         switch (l2info->cookie_type) {
1362         case LS_COOKIE_ID:
1363             l2info->bundle = l2info->cookie[1];
1364             l2info->proto = EXTRACT_16BITS(p);
1365             l2info->header_len += 2;
1366             l2info->length -= 2;
1367             l2info->caplen -= 2;
1368             break;
1369         case AS_COOKIE_ID:
1370             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1371             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1372             break;
1373         default:
1374             l2info->bundle = l2info->cookie[0];
1375             l2info->header_len += 2;
1376             l2info->length -= 2;
1377             l2info->caplen -= 2;
1378             break;
1379         }
1380         break;
1381 #endif
1382 #ifdef DLT_JUNIPER_MFR
1383     case DLT_JUNIPER_MFR:
1384         switch (l2info->cookie_type) {
1385         case LS_COOKIE_ID:
1386             l2info->bundle = l2info->cookie[1];
1387             l2info->proto = EXTRACT_16BITS(p);
1388             l2info->header_len += 2;
1389             l2info->length -= 2;
1390             l2info->caplen -= 2;
1391             break;
1392         case AS_COOKIE_ID:
1393             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1394             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1395             break;
1396         default:
1397             l2info->bundle = l2info->cookie[0];
1398             break;
1399         }
1400         break;
1401 #endif
1402 #ifdef DLT_JUNIPER_ATM2
1403     case DLT_JUNIPER_ATM2:
1404         ND_TCHECK2(p[0], 4);
1405         /* ATM cell relay control word present ? */
1406         if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
1407             control_word = EXTRACT_32BITS(p);
1408             /* some control word heuristics */
1409             switch(control_word) {
1410             case 0: /* zero control word */
1411             case 0x08000000: /* < JUNOS 7.4 control-word */
1412             case 0x08380000: /* cntl word plus cell length (56) >= JUNOS 7.4*/
1413                 l2info->header_len += 4;
1414                 break;
1415             default:
1416                 break;
1417             }
1418 
1419             if (ndo->ndo_eflag)
1420                 ND_PRINT((ndo, "control-word 0x%08x ", control_word));
1421         }
1422         break;
1423 #endif
1424 #ifdef DLT_JUNIPER_GGSN
1425     case DLT_JUNIPER_GGSN:
1426         break;
1427 #endif
1428 #ifdef DLT_JUNIPER_ATM1
1429     case DLT_JUNIPER_ATM1:
1430         break;
1431 #endif
1432 #ifdef DLT_JUNIPER_PPP
1433     case DLT_JUNIPER_PPP:
1434         break;
1435 #endif
1436 #ifdef DLT_JUNIPER_CHDLC
1437     case DLT_JUNIPER_CHDLC:
1438         break;
1439 #endif
1440 #ifdef DLT_JUNIPER_ETHER
1441     case DLT_JUNIPER_ETHER:
1442         break;
1443 #endif
1444 #ifdef DLT_JUNIPER_FRELAY
1445     case DLT_JUNIPER_FRELAY:
1446         break;
1447 #endif
1448 
1449     default:
1450         ND_PRINT((ndo, "Unknown Juniper DLT_ type %u: ", l2info->pictype));
1451         break;
1452     }
1453 
1454     if (ndo->ndo_eflag > 1)
1455         ND_PRINT((ndo, "hlen %u, proto 0x%04x, ", l2info->header_len, l2info->proto));
1456 
1457     return 1; /* everything went ok so far. continue parsing */
1458  trunc:
1459     ND_PRINT((ndo, "[|juniper_hdr], length %u", h->len));
1460     return 0;
1461 }
1462 
1463 
1464 /*
1465  * Local Variables:
1466  * c-style: whitesmith
1467  * c-basic-offset: 4
1468  * End:
1469  */
1470