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@gredler.at)
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         ND_TCHECK(*gh);
476         if (ndo->ndo_eflag) {
477             ND_PRINT((ndo, "proto %s (%u), vlan %u: ",
478                    tok2str(juniper_protocol_values,"Unknown",gh->proto),
479                    gh->proto,
480                    EXTRACT_16BITS(&gh->vlan_id[0])));
481         }
482 
483         switch (gh->proto) {
484         case JUNIPER_PROTO_IPV4:
485             ip_print(ndo, p, l2info.length);
486             break;
487         case JUNIPER_PROTO_IPV6:
488             ip6_print(ndo, p, l2info.length);
489             break;
490         default:
491             if (!ndo->ndo_eflag)
492                 ND_PRINT((ndo, "unknown GGSN proto (%u)", gh->proto));
493         }
494 
495         return l2info.header_len;
496 
497 trunc:
498 	ND_PRINT((ndo, "[|juniper_services]"));
499 	return l2info.header_len;
500 }
501 #endif
502 
503 #ifdef DLT_JUNIPER_ES
504 u_int
juniper_es_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)505 juniper_es_print(netdissect_options *ndo,
506                  const struct pcap_pkthdr *h, register const u_char *p)
507 {
508         struct juniper_l2info_t l2info;
509         struct juniper_ipsec_header {
510             uint8_t sa_index[2];
511             uint8_t ttl;
512             uint8_t type;
513             uint8_t spi[4];
514             uint8_t src_ip[4];
515             uint8_t dst_ip[4];
516         };
517         u_int rewrite_len,es_type_bundle;
518         const struct juniper_ipsec_header *ih;
519 
520         l2info.pictype = DLT_JUNIPER_ES;
521         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
522             return l2info.header_len;
523 
524         p+=l2info.header_len;
525         ih = (const struct juniper_ipsec_header *)p;
526 
527         ND_TCHECK(*ih);
528         switch (ih->type) {
529         case JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE:
530         case JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE:
531             rewrite_len = 0;
532             es_type_bundle = 1;
533             break;
534         case JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE:
535         case JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE:
536         case JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE:
537             rewrite_len = 16;
538             es_type_bundle = 0;
539             break;
540         default:
541             ND_PRINT((ndo, "ES Invalid type %u, length %u",
542                    ih->type,
543                    l2info.length));
544             return l2info.header_len;
545         }
546 
547         l2info.length-=rewrite_len;
548         p+=rewrite_len;
549 
550         if (ndo->ndo_eflag) {
551             if (!es_type_bundle) {
552                 ND_PRINT((ndo, "ES SA, index %u, ttl %u type %s (%u), spi %u, Tunnel %s > %s, length %u\n",
553                        EXTRACT_16BITS(&ih->sa_index),
554                        ih->ttl,
555                        tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
556                        ih->type,
557                        EXTRACT_32BITS(&ih->spi),
558                        ipaddr_string(ndo, &ih->src_ip),
559                        ipaddr_string(ndo, &ih->dst_ip),
560                        l2info.length));
561             } else {
562                 ND_PRINT((ndo, "ES SA, index %u, ttl %u type %s (%u), length %u\n",
563                        EXTRACT_16BITS(&ih->sa_index),
564                        ih->ttl,
565                        tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
566                        ih->type,
567                        l2info.length));
568             }
569         }
570 
571         ip_print(ndo, p, l2info.length);
572         return l2info.header_len;
573 
574 trunc:
575 	ND_PRINT((ndo, "[|juniper_services]"));
576 	return l2info.header_len;
577 }
578 #endif
579 
580 #ifdef DLT_JUNIPER_MONITOR
581 u_int
juniper_monitor_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)582 juniper_monitor_print(netdissect_options *ndo,
583                       const struct pcap_pkthdr *h, register const u_char *p)
584 {
585         struct juniper_l2info_t l2info;
586         struct juniper_monitor_header {
587             uint8_t pkt_type;
588             uint8_t padding;
589             uint8_t iif[2];
590             uint8_t service_id[4];
591         };
592         const struct juniper_monitor_header *mh;
593 
594         l2info.pictype = DLT_JUNIPER_MONITOR;
595         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
596             return l2info.header_len;
597 
598         p+=l2info.header_len;
599         mh = (const struct juniper_monitor_header *)p;
600 
601         ND_TCHECK(*mh);
602         if (ndo->ndo_eflag)
603             ND_PRINT((ndo, "service-id %u, iif %u, pkt-type %u: ",
604                    EXTRACT_32BITS(&mh->service_id),
605                    EXTRACT_16BITS(&mh->iif),
606                    mh->pkt_type));
607 
608         /* no proto field - lets guess by first byte of IP header*/
609         ip_heuristic_guess (ndo, p, l2info.length);
610 
611         return l2info.header_len;
612 
613 trunc:
614 	ND_PRINT((ndo, "[|juniper_services]"));
615 	return l2info.header_len;
616 }
617 #endif
618 
619 #ifdef DLT_JUNIPER_SERVICES
620 u_int
juniper_services_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)621 juniper_services_print(netdissect_options *ndo,
622                        const struct pcap_pkthdr *h, register const u_char *p)
623 {
624         struct juniper_l2info_t l2info;
625         struct juniper_services_header {
626             uint8_t svc_id;
627             uint8_t flags_len;
628             uint8_t svc_set_id[2];
629             uint8_t dir_iif[4];
630         };
631         const struct juniper_services_header *sh;
632 
633         l2info.pictype = DLT_JUNIPER_SERVICES;
634         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
635             return l2info.header_len;
636 
637         p+=l2info.header_len;
638         sh = (const struct juniper_services_header *)p;
639 
640         ND_TCHECK(*sh);
641         if (ndo->ndo_eflag)
642             ND_PRINT((ndo, "service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
643                    sh->svc_id,
644                    sh->flags_len,
645                    EXTRACT_16BITS(&sh->svc_set_id),
646                    EXTRACT_24BITS(&sh->dir_iif[1])));
647 
648         /* no proto field - lets guess by first byte of IP header*/
649         ip_heuristic_guess (ndo, p, l2info.length);
650 
651         return l2info.header_len;
652 
653 trunc:
654 	ND_PRINT((ndo, "[|juniper_services]"));
655 	return l2info.header_len;
656 }
657 #endif
658 
659 #ifdef DLT_JUNIPER_PPPOE
660 u_int
juniper_pppoe_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)661 juniper_pppoe_print(netdissect_options *ndo,
662                     const struct pcap_pkthdr *h, register const u_char *p)
663 {
664         struct juniper_l2info_t l2info;
665 
666         l2info.pictype = DLT_JUNIPER_PPPOE;
667         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
668             return l2info.header_len;
669 
670         p+=l2info.header_len;
671         /* this DLT contains nothing but raw ethernet frames */
672         ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
673         return l2info.header_len;
674 }
675 #endif
676 
677 #ifdef DLT_JUNIPER_ETHER
678 u_int
juniper_ether_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)679 juniper_ether_print(netdissect_options *ndo,
680                     const struct pcap_pkthdr *h, register const u_char *p)
681 {
682         struct juniper_l2info_t l2info;
683 
684         l2info.pictype = DLT_JUNIPER_ETHER;
685         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
686             return l2info.header_len;
687 
688         p+=l2info.header_len;
689         /* this DLT contains nothing but raw Ethernet frames */
690         ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
691         return l2info.header_len;
692 }
693 #endif
694 
695 #ifdef DLT_JUNIPER_PPP
696 u_int
juniper_ppp_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)697 juniper_ppp_print(netdissect_options *ndo,
698                   const struct pcap_pkthdr *h, register const u_char *p)
699 {
700         struct juniper_l2info_t l2info;
701 
702         l2info.pictype = DLT_JUNIPER_PPP;
703         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
704             return l2info.header_len;
705 
706         p+=l2info.header_len;
707         /* this DLT contains nothing but raw ppp frames */
708         ppp_print(ndo, p, l2info.length);
709         return l2info.header_len;
710 }
711 #endif
712 
713 #ifdef DLT_JUNIPER_FRELAY
714 u_int
juniper_frelay_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)715 juniper_frelay_print(netdissect_options *ndo,
716                      const struct pcap_pkthdr *h, register const u_char *p)
717 {
718         struct juniper_l2info_t l2info;
719 
720         l2info.pictype = DLT_JUNIPER_FRELAY;
721         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
722             return l2info.header_len;
723 
724         p+=l2info.header_len;
725         /* this DLT contains nothing but raw frame-relay frames */
726         fr_print(ndo, p, l2info.length);
727         return l2info.header_len;
728 }
729 #endif
730 
731 #ifdef DLT_JUNIPER_CHDLC
732 u_int
juniper_chdlc_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)733 juniper_chdlc_print(netdissect_options *ndo,
734                     const struct pcap_pkthdr *h, register const u_char *p)
735 {
736         struct juniper_l2info_t l2info;
737 
738         l2info.pictype = DLT_JUNIPER_CHDLC;
739         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
740             return l2info.header_len;
741 
742         p+=l2info.header_len;
743         /* this DLT contains nothing but raw c-hdlc frames */
744         chdlc_print(ndo, p, l2info.length);
745         return l2info.header_len;
746 }
747 #endif
748 
749 #ifdef DLT_JUNIPER_PPPOE_ATM
750 u_int
juniper_pppoe_atm_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)751 juniper_pppoe_atm_print(netdissect_options *ndo,
752                         const struct pcap_pkthdr *h, register const u_char *p)
753 {
754         struct juniper_l2info_t l2info;
755 	uint16_t extracted_ethertype;
756 
757         l2info.pictype = DLT_JUNIPER_PPPOE_ATM;
758         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
759             return l2info.header_len;
760 
761         p+=l2info.header_len;
762 
763         ND_TCHECK2(p[0], 2);
764         extracted_ethertype = EXTRACT_16BITS(p);
765         /* this DLT contains nothing but raw PPPoE frames,
766          * prepended with a type field*/
767         if (ethertype_print(ndo, extracted_ethertype,
768                               p+ETHERTYPE_LEN,
769                               l2info.length-ETHERTYPE_LEN,
770                               l2info.caplen-ETHERTYPE_LEN,
771                               NULL, NULL) == 0)
772             /* ether_type not known, probably it wasn't one */
773             ND_PRINT((ndo, "unknown ethertype 0x%04x", extracted_ethertype));
774 
775         return l2info.header_len;
776 
777 trunc:
778 	ND_PRINT((ndo, "[|juniper_pppoe_atm]"));
779 	return l2info.header_len;
780 }
781 #endif
782 
783 #ifdef DLT_JUNIPER_MLPPP
784 u_int
juniper_mlppp_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)785 juniper_mlppp_print(netdissect_options *ndo,
786                     const struct pcap_pkthdr *h, register const u_char *p)
787 {
788         struct juniper_l2info_t l2info;
789 
790         l2info.pictype = DLT_JUNIPER_MLPPP;
791         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
792             return l2info.header_len;
793 
794         /* suppress Bundle-ID if frame was captured on a child-link
795          * best indicator if the cookie looks like a proto */
796         if (ndo->ndo_eflag &&
797             EXTRACT_16BITS(&l2info.cookie) != PPP_OSI &&
798             EXTRACT_16BITS(&l2info.cookie) !=  (PPP_ADDRESS << 8 | PPP_CONTROL))
799             ND_PRINT((ndo, "Bundle-ID %u: ", l2info.bundle));
800 
801         p+=l2info.header_len;
802 
803         /* first try the LSQ protos */
804         switch(l2info.proto) {
805         case JUNIPER_LSQ_L3_PROTO_IPV4:
806             /* IP traffic going to the RE would not have a cookie
807              * -> this must be incoming IS-IS over PPP
808              */
809             if (l2info.cookie[4] == (JUNIPER_LSQ_COOKIE_RE|JUNIPER_LSQ_COOKIE_DIR))
810                 ppp_print(ndo, p, l2info.length);
811             else
812                 ip_print(ndo, p, l2info.length);
813             return l2info.header_len;
814         case JUNIPER_LSQ_L3_PROTO_IPV6:
815             ip6_print(ndo, p,l2info.length);
816             return l2info.header_len;
817         case JUNIPER_LSQ_L3_PROTO_MPLS:
818             mpls_print(ndo, p, l2info.length);
819             return l2info.header_len;
820         case JUNIPER_LSQ_L3_PROTO_ISO:
821             isoclns_print(ndo, p, l2info.length);
822             return l2info.header_len;
823         default:
824             break;
825         }
826 
827         /* zero length cookie ? */
828         switch (EXTRACT_16BITS(&l2info.cookie)) {
829         case PPP_OSI:
830             ppp_print(ndo, p - 2, l2info.length + 2);
831             break;
832         case (PPP_ADDRESS << 8 | PPP_CONTROL): /* fall through */
833         default:
834             ppp_print(ndo, p, l2info.length);
835             break;
836         }
837 
838         return l2info.header_len;
839 }
840 #endif
841 
842 
843 #ifdef DLT_JUNIPER_MFR
844 u_int
juniper_mfr_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)845 juniper_mfr_print(netdissect_options *ndo,
846                   const struct pcap_pkthdr *h, register const u_char *p)
847 {
848         struct juniper_l2info_t l2info;
849 
850         memset(&l2info, 0, sizeof(l2info));
851         l2info.pictype = DLT_JUNIPER_MFR;
852         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
853             return l2info.header_len;
854 
855         p+=l2info.header_len;
856 
857         /* child-link ? */
858         if (l2info.cookie_len == 0) {
859             mfr_print(ndo, p, l2info.length);
860             return l2info.header_len;
861         }
862 
863         /* first try the LSQ protos */
864         if (l2info.cookie_len == AS_PIC_COOKIE_LEN) {
865             switch(l2info.proto) {
866             case JUNIPER_LSQ_L3_PROTO_IPV4:
867                 ip_print(ndo, p, l2info.length);
868                 return l2info.header_len;
869             case JUNIPER_LSQ_L3_PROTO_IPV6:
870                 ip6_print(ndo, p,l2info.length);
871                 return l2info.header_len;
872             case JUNIPER_LSQ_L3_PROTO_MPLS:
873                 mpls_print(ndo, p, l2info.length);
874                 return l2info.header_len;
875             case JUNIPER_LSQ_L3_PROTO_ISO:
876                 isoclns_print(ndo, p, l2info.length);
877                 return l2info.header_len;
878             default:
879                 break;
880             }
881             return l2info.header_len;
882         }
883 
884         /* suppress Bundle-ID if frame was captured on a child-link */
885         if (ndo->ndo_eflag && EXTRACT_32BITS(l2info.cookie) != 1)
886             ND_PRINT((ndo, "Bundle-ID %u, ", l2info.bundle));
887         switch (l2info.proto) {
888         case (LLCSAP_ISONS<<8 | LLCSAP_ISONS):
889             isoclns_print(ndo, p + 1, l2info.length - 1);
890             break;
891         case (LLC_UI<<8 | NLPID_Q933):
892         case (LLC_UI<<8 | NLPID_IP):
893         case (LLC_UI<<8 | NLPID_IP6):
894             /* pass IP{4,6} to the OSI layer for proper link-layer printing */
895             isoclns_print(ndo, p - 1, l2info.length + 1);
896             break;
897         default:
898             ND_PRINT((ndo, "unknown protocol 0x%04x, length %u", l2info.proto, l2info.length));
899         }
900 
901         return l2info.header_len;
902 }
903 #endif
904 
905 #ifdef DLT_JUNIPER_MLFR
906 u_int
juniper_mlfr_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)907 juniper_mlfr_print(netdissect_options *ndo,
908                    const struct pcap_pkthdr *h, register const u_char *p)
909 {
910         struct juniper_l2info_t l2info;
911 
912         l2info.pictype = DLT_JUNIPER_MLFR;
913         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
914             return l2info.header_len;
915 
916         p+=l2info.header_len;
917 
918         /* suppress Bundle-ID if frame was captured on a child-link */
919         if (ndo->ndo_eflag && EXTRACT_32BITS(l2info.cookie) != 1)
920             ND_PRINT((ndo, "Bundle-ID %u, ", l2info.bundle));
921         switch (l2info.proto) {
922         case (LLC_UI):
923         case (LLC_UI<<8):
924             isoclns_print(ndo, p, l2info.length);
925             break;
926         case (LLC_UI<<8 | NLPID_Q933):
927         case (LLC_UI<<8 | NLPID_IP):
928         case (LLC_UI<<8 | NLPID_IP6):
929             /* pass IP{4,6} to the OSI layer for proper link-layer printing */
930             isoclns_print(ndo, p - 1, l2info.length + 1);
931             break;
932         default:
933             ND_PRINT((ndo, "unknown protocol 0x%04x, length %u", l2info.proto, l2info.length));
934         }
935 
936         return l2info.header_len;
937 }
938 #endif
939 
940 /*
941  *     ATM1 PIC cookie format
942  *
943  *     +-----+-------------------------+-------------------------------+
944  *     |fmtid|     vc index            |  channel  ID                  |
945  *     +-----+-------------------------+-------------------------------+
946  */
947 
948 #ifdef DLT_JUNIPER_ATM1
949 u_int
juniper_atm1_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)950 juniper_atm1_print(netdissect_options *ndo,
951                    const struct pcap_pkthdr *h, register const u_char *p)
952 {
953         int llc_hdrlen;
954 
955         struct juniper_l2info_t l2info;
956 
957         l2info.pictype = DLT_JUNIPER_ATM1;
958         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
959             return l2info.header_len;
960 
961         p+=l2info.header_len;
962 
963         if (l2info.cookie[0] == 0x80) { /* OAM cell ? */
964             oam_print(ndo, p, l2info.length, ATM_OAM_NOHEC);
965             return l2info.header_len;
966         }
967 
968         ND_TCHECK2(p[0], 3);
969         if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
970             EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
971 
972             llc_hdrlen = llc_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
973             if (llc_hdrlen > 0)
974                 return l2info.header_len;
975         }
976 
977         if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
978             isoclns_print(ndo, p + 1, l2info.length - 1);
979             /* FIXME check if frame was recognized */
980             return l2info.header_len;
981         }
982 
983         if (ip_heuristic_guess(ndo, p, l2info.length) != 0) /* last try - vcmux encaps ? */
984             return l2info.header_len;
985 
986 	return l2info.header_len;
987 
988 trunc:
989 	ND_PRINT((ndo, "[|juniper_atm1]"));
990 	return l2info.header_len;
991 }
992 #endif
993 
994 /*
995  *     ATM2 PIC cookie format
996  *
997  *     +-------------------------------+---------+---+-----+-----------+
998  *     |     channel ID                |  reserv |AAL| CCRQ| gap cnt   |
999  *     +-------------------------------+---------+---+-----+-----------+
1000  */
1001 
1002 #ifdef DLT_JUNIPER_ATM2
1003 u_int
juniper_atm2_print(netdissect_options * ndo,const struct pcap_pkthdr * h,register const u_char * p)1004 juniper_atm2_print(netdissect_options *ndo,
1005                    const struct pcap_pkthdr *h, register const u_char *p)
1006 {
1007         int llc_hdrlen;
1008 
1009         struct juniper_l2info_t l2info;
1010 
1011         l2info.pictype = DLT_JUNIPER_ATM2;
1012         if (juniper_parse_header(ndo, p, h, &l2info) == 0)
1013             return l2info.header_len;
1014 
1015         p+=l2info.header_len;
1016 
1017         if (l2info.cookie[7] & ATM2_PKT_TYPE_MASK) { /* OAM cell ? */
1018             oam_print(ndo, p, l2info.length, ATM_OAM_NOHEC);
1019             return l2info.header_len;
1020         }
1021 
1022         ND_TCHECK2(p[0], 3);
1023         if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
1024             EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
1025 
1026             llc_hdrlen = llc_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
1027             if (llc_hdrlen > 0)
1028                 return l2info.header_len;
1029         }
1030 
1031         if (l2info.direction != JUNIPER_BPF_PKT_IN && /* ether-over-1483 encaps ? */
1032             (EXTRACT_32BITS(l2info.cookie) & ATM2_GAP_COUNT_MASK)) {
1033             ether_print(ndo, p, l2info.length, l2info.caplen, NULL, NULL);
1034             return l2info.header_len;
1035         }
1036 
1037         if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
1038             isoclns_print(ndo, p + 1, l2info.length - 1);
1039             /* FIXME check if frame was recognized */
1040             return l2info.header_len;
1041         }
1042 
1043         if(juniper_ppp_heuristic_guess(ndo, p, l2info.length) != 0) /* PPPoA vcmux encaps ? */
1044             return l2info.header_len;
1045 
1046         if (ip_heuristic_guess(ndo, p, l2info.length) != 0) /* last try - vcmux encaps ? */
1047             return l2info.header_len;
1048 
1049 	return l2info.header_len;
1050 
1051 trunc:
1052 	ND_PRINT((ndo, "[|juniper_atm2]"));
1053 	return l2info.header_len;
1054 }
1055 #endif
1056 
1057 
1058 /* try to guess, based on all PPP protos that are supported in
1059  * a juniper router if the payload data is encapsulated using PPP */
1060 static int
juniper_ppp_heuristic_guess(netdissect_options * ndo,register const u_char * p,u_int length)1061 juniper_ppp_heuristic_guess(netdissect_options *ndo,
1062                             register const u_char *p, u_int length)
1063 {
1064     switch(EXTRACT_16BITS(p)) {
1065     case PPP_IP :
1066     case PPP_OSI :
1067     case PPP_MPLS_UCAST :
1068     case PPP_MPLS_MCAST :
1069     case PPP_IPCP :
1070     case PPP_OSICP :
1071     case PPP_MPLSCP :
1072     case PPP_LCP :
1073     case PPP_PAP :
1074     case PPP_CHAP :
1075     case PPP_ML :
1076     case PPP_IPV6 :
1077     case PPP_IPV6CP :
1078         ppp_print(ndo, p, length);
1079         break;
1080 
1081     default:
1082         return 0; /* did not find a ppp header */
1083         break;
1084     }
1085     return 1; /* we printed a ppp packet */
1086 }
1087 
1088 static int
ip_heuristic_guess(netdissect_options * ndo,register const u_char * p,u_int length)1089 ip_heuristic_guess(netdissect_options *ndo,
1090                    register const u_char *p, u_int length)
1091 {
1092     switch(p[0]) {
1093     case 0x45:
1094     case 0x46:
1095     case 0x47:
1096     case 0x48:
1097     case 0x49:
1098     case 0x4a:
1099     case 0x4b:
1100     case 0x4c:
1101     case 0x4d:
1102     case 0x4e:
1103     case 0x4f:
1104 	    ip_print(ndo, p, length);
1105 	    break;
1106     case 0x60:
1107     case 0x61:
1108     case 0x62:
1109     case 0x63:
1110     case 0x64:
1111     case 0x65:
1112     case 0x66:
1113     case 0x67:
1114     case 0x68:
1115     case 0x69:
1116     case 0x6a:
1117     case 0x6b:
1118     case 0x6c:
1119     case 0x6d:
1120     case 0x6e:
1121     case 0x6f:
1122         ip6_print(ndo, p, length);
1123         break;
1124     default:
1125         return 0; /* did not find a ip header */
1126         break;
1127     }
1128     return 1; /* we printed an v4/v6 packet */
1129 }
1130 
1131 static int
juniper_read_tlv_value(const u_char * p,u_int tlv_type,u_int tlv_len)1132 juniper_read_tlv_value(const u_char *p, u_int tlv_type, u_int tlv_len)
1133 {
1134    int tlv_value;
1135 
1136    /* TLVs < 128 are little endian encoded */
1137    if (tlv_type < 128) {
1138        switch (tlv_len) {
1139        case 1:
1140            tlv_value = *p;
1141            break;
1142        case 2:
1143            tlv_value = EXTRACT_LE_16BITS(p);
1144            break;
1145        case 3:
1146            tlv_value = EXTRACT_LE_24BITS(p);
1147            break;
1148        case 4:
1149            tlv_value = EXTRACT_LE_32BITS(p);
1150            break;
1151        default:
1152            tlv_value = -1;
1153            break;
1154        }
1155    } else {
1156        /* TLVs >= 128 are big endian encoded */
1157        switch (tlv_len) {
1158        case 1:
1159            tlv_value = *p;
1160            break;
1161        case 2:
1162            tlv_value = EXTRACT_16BITS(p);
1163            break;
1164        case 3:
1165            tlv_value = EXTRACT_24BITS(p);
1166            break;
1167        case 4:
1168            tlv_value = EXTRACT_32BITS(p);
1169            break;
1170        default:
1171            tlv_value = -1;
1172            break;
1173        }
1174    }
1175    return tlv_value;
1176 }
1177 
1178 static int
juniper_parse_header(netdissect_options * ndo,const u_char * p,const struct pcap_pkthdr * h,struct juniper_l2info_t * l2info)1179 juniper_parse_header(netdissect_options *ndo,
1180                      const u_char *p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info)
1181 {
1182     const struct juniper_cookie_table_t *lp = juniper_cookie_table;
1183     u_int idx, jnx_ext_len, jnx_header_len = 0;
1184     uint8_t tlv_type,tlv_len;
1185     uint32_t control_word;
1186     int tlv_value;
1187     const u_char *tptr;
1188 
1189 
1190     l2info->header_len = 0;
1191     l2info->cookie_len = 0;
1192     l2info->proto = 0;
1193 
1194 
1195     l2info->length = h->len;
1196     l2info->caplen = h->caplen;
1197     ND_TCHECK2(p[0], 4);
1198     l2info->flags = p[3];
1199     l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
1200 
1201     if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) { /* magic number found ? */
1202         ND_PRINT((ndo, "no magic-number found!"));
1203         return 0;
1204     }
1205 
1206     if (ndo->ndo_eflag) /* print direction */
1207         ND_PRINT((ndo, "%3s ", tok2str(juniper_direction_values, "---", l2info->direction)));
1208 
1209     /* magic number + flags */
1210     jnx_header_len = 4;
1211 
1212     if (ndo->ndo_vflag > 1)
1213         ND_PRINT((ndo, "\n\tJuniper PCAP Flags [%s]",
1214                bittok2str(jnx_flag_values, "none", l2info->flags)));
1215 
1216     /* extensions present ?  - calculate how much bytes to skip */
1217     if ((l2info->flags & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
1218 
1219         tptr = p+jnx_header_len;
1220 
1221         /* ok to read extension length ? */
1222         ND_TCHECK2(tptr[0], 2);
1223         jnx_ext_len = EXTRACT_16BITS(tptr);
1224         jnx_header_len += 2;
1225         tptr +=2;
1226 
1227         /* nail up the total length -
1228          * just in case something goes wrong
1229          * with TLV parsing */
1230         jnx_header_len += jnx_ext_len;
1231 
1232         if (ndo->ndo_vflag > 1)
1233             ND_PRINT((ndo, ", PCAP Extension(s) total length %u", jnx_ext_len));
1234 
1235         ND_TCHECK2(tptr[0], jnx_ext_len);
1236         while (jnx_ext_len > JUNIPER_EXT_TLV_OVERHEAD) {
1237             tlv_type = *(tptr++);
1238             tlv_len = *(tptr++);
1239             tlv_value = 0;
1240 
1241             /* sanity checks */
1242             if (tlv_type == 0 || tlv_len == 0)
1243                 break;
1244             if (tlv_len+JUNIPER_EXT_TLV_OVERHEAD > jnx_ext_len)
1245                 goto trunc;
1246 
1247             if (ndo->ndo_vflag > 1)
1248                 ND_PRINT((ndo, "\n\t  %s Extension TLV #%u, length %u, value ",
1249                        tok2str(jnx_ext_tlv_values,"Unknown",tlv_type),
1250                        tlv_type,
1251                        tlv_len));
1252 
1253             tlv_value = juniper_read_tlv_value(tptr, tlv_type, tlv_len);
1254             switch (tlv_type) {
1255             case JUNIPER_EXT_TLV_IFD_NAME:
1256                 /* FIXME */
1257                 break;
1258             case JUNIPER_EXT_TLV_IFD_MEDIATYPE:
1259             case JUNIPER_EXT_TLV_TTP_IFD_MEDIATYPE:
1260                 if (tlv_value != -1) {
1261                     if (ndo->ndo_vflag > 1)
1262                         ND_PRINT((ndo, "%s (%u)",
1263                                tok2str(juniper_ifmt_values, "Unknown", tlv_value),
1264                                tlv_value));
1265                 }
1266                 break;
1267             case JUNIPER_EXT_TLV_IFL_ENCAPS:
1268             case JUNIPER_EXT_TLV_TTP_IFL_ENCAPS:
1269                 if (tlv_value != -1) {
1270                     if (ndo->ndo_vflag > 1)
1271                         ND_PRINT((ndo, "%s (%u)",
1272                                tok2str(juniper_ifle_values, "Unknown", tlv_value),
1273                                tlv_value));
1274                 }
1275                 break;
1276             case JUNIPER_EXT_TLV_IFL_IDX: /* fall through */
1277             case JUNIPER_EXT_TLV_IFL_UNIT:
1278             case JUNIPER_EXT_TLV_IFD_IDX:
1279             default:
1280                 if (tlv_value != -1) {
1281                     if (ndo->ndo_vflag > 1)
1282                         ND_PRINT((ndo, "%u", tlv_value));
1283                 }
1284                 break;
1285             }
1286 
1287             tptr+=tlv_len;
1288             jnx_ext_len -= tlv_len+JUNIPER_EXT_TLV_OVERHEAD;
1289         }
1290 
1291         if (ndo->ndo_vflag > 1)
1292             ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
1293     }
1294 
1295     if ((l2info->flags & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
1296         if (ndo->ndo_eflag)
1297             ND_PRINT((ndo, "no-L2-hdr, "));
1298 
1299         /* there is no link-layer present -
1300          * perform the v4/v6 heuristics
1301          * to figure out what it is
1302          */
1303         ND_TCHECK2(p[jnx_header_len + 4], 1);
1304         if (ip_heuristic_guess(ndo, p + jnx_header_len + 4,
1305                                l2info->length - (jnx_header_len + 4)) == 0)
1306             ND_PRINT((ndo, "no IP-hdr found!"));
1307 
1308         l2info->header_len=jnx_header_len+4;
1309         return 0; /* stop parsing the output further */
1310 
1311     }
1312     l2info->header_len = jnx_header_len;
1313     p+=l2info->header_len;
1314     l2info->length -= l2info->header_len;
1315     l2info->caplen -= l2info->header_len;
1316 
1317     /* search through the cookie table and copy values matching for our PIC type */
1318     ND_TCHECK(p[0]);
1319     while (lp->s != NULL) {
1320         if (lp->pictype == l2info->pictype) {
1321 
1322             l2info->cookie_len += lp->cookie_len;
1323 
1324             switch (p[0]) {
1325             case LS_COOKIE_ID:
1326                 l2info->cookie_type = LS_COOKIE_ID;
1327                 l2info->cookie_len += 2;
1328                 break;
1329             case AS_COOKIE_ID:
1330                 l2info->cookie_type = AS_COOKIE_ID;
1331                 l2info->cookie_len = 8;
1332                 break;
1333 
1334             default:
1335                 l2info->bundle = l2info->cookie[0];
1336                 break;
1337             }
1338 
1339 
1340 #ifdef DLT_JUNIPER_MFR
1341             /* MFR child links don't carry cookies */
1342             if (l2info->pictype == DLT_JUNIPER_MFR &&
1343                 (p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
1344                 l2info->cookie_len = 0;
1345             }
1346 #endif
1347 
1348             l2info->header_len += l2info->cookie_len;
1349             l2info->length -= l2info->cookie_len;
1350             l2info->caplen -= l2info->cookie_len;
1351 
1352             if (ndo->ndo_eflag)
1353                 ND_PRINT((ndo, "%s-PIC, cookie-len %u",
1354                        lp->s,
1355                        l2info->cookie_len));
1356 
1357             if (l2info->cookie_len > 0) {
1358                 ND_TCHECK2(p[0], l2info->cookie_len);
1359                 if (ndo->ndo_eflag)
1360                     ND_PRINT((ndo, ", cookie 0x"));
1361                 for (idx = 0; idx < l2info->cookie_len; idx++) {
1362                     l2info->cookie[idx] = p[idx]; /* copy cookie data */
1363                     if (ndo->ndo_eflag) ND_PRINT((ndo, "%02x", p[idx]));
1364                 }
1365             }
1366 
1367             if (ndo->ndo_eflag) ND_PRINT((ndo, ": ")); /* print demarc b/w L2/L3*/
1368 
1369 
1370             ND_TCHECK_16BITS(p+l2info->cookie_len);
1371             l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
1372             break;
1373         }
1374         ++lp;
1375     }
1376     p+=l2info->cookie_len;
1377 
1378     /* DLT_ specific parsing */
1379     switch(l2info->pictype) {
1380 #ifdef DLT_JUNIPER_MLPPP
1381     case DLT_JUNIPER_MLPPP:
1382         switch (l2info->cookie_type) {
1383         case LS_COOKIE_ID:
1384             l2info->bundle = l2info->cookie[1];
1385             break;
1386         case AS_COOKIE_ID:
1387             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1388             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1389             break;
1390         default:
1391             l2info->bundle = l2info->cookie[0];
1392             break;
1393         }
1394         break;
1395 #endif
1396 #ifdef DLT_JUNIPER_MLFR
1397     case DLT_JUNIPER_MLFR:
1398         switch (l2info->cookie_type) {
1399         case LS_COOKIE_ID:
1400             ND_TCHECK2(p[0], 2);
1401             l2info->bundle = l2info->cookie[1];
1402             l2info->proto = EXTRACT_16BITS(p);
1403             l2info->header_len += 2;
1404             l2info->length -= 2;
1405             l2info->caplen -= 2;
1406             break;
1407         case AS_COOKIE_ID:
1408             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1409             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1410             break;
1411         default:
1412             l2info->bundle = l2info->cookie[0];
1413             l2info->header_len += 2;
1414             l2info->length -= 2;
1415             l2info->caplen -= 2;
1416             break;
1417         }
1418         break;
1419 #endif
1420 #ifdef DLT_JUNIPER_MFR
1421     case DLT_JUNIPER_MFR:
1422         switch (l2info->cookie_type) {
1423         case LS_COOKIE_ID:
1424             ND_TCHECK2(p[0], 2);
1425             l2info->bundle = l2info->cookie[1];
1426             l2info->proto = EXTRACT_16BITS(p);
1427             l2info->header_len += 2;
1428             l2info->length -= 2;
1429             l2info->caplen -= 2;
1430             break;
1431         case AS_COOKIE_ID:
1432             l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
1433             l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
1434             break;
1435         default:
1436             l2info->bundle = l2info->cookie[0];
1437             break;
1438         }
1439         break;
1440 #endif
1441 #ifdef DLT_JUNIPER_ATM2
1442     case DLT_JUNIPER_ATM2:
1443         ND_TCHECK2(p[0], 4);
1444         /* ATM cell relay control word present ? */
1445         if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
1446             control_word = EXTRACT_32BITS(p);
1447             /* some control word heuristics */
1448             switch(control_word) {
1449             case 0: /* zero control word */
1450             case 0x08000000: /* < JUNOS 7.4 control-word */
1451             case 0x08380000: /* cntl word plus cell length (56) >= JUNOS 7.4*/
1452                 l2info->header_len += 4;
1453                 break;
1454             default:
1455                 break;
1456             }
1457 
1458             if (ndo->ndo_eflag)
1459                 ND_PRINT((ndo, "control-word 0x%08x ", control_word));
1460         }
1461         break;
1462 #endif
1463 #ifdef DLT_JUNIPER_GGSN
1464     case DLT_JUNIPER_GGSN:
1465         break;
1466 #endif
1467 #ifdef DLT_JUNIPER_ATM1
1468     case DLT_JUNIPER_ATM1:
1469         break;
1470 #endif
1471 #ifdef DLT_JUNIPER_PPP
1472     case DLT_JUNIPER_PPP:
1473         break;
1474 #endif
1475 #ifdef DLT_JUNIPER_CHDLC
1476     case DLT_JUNIPER_CHDLC:
1477         break;
1478 #endif
1479 #ifdef DLT_JUNIPER_ETHER
1480     case DLT_JUNIPER_ETHER:
1481         break;
1482 #endif
1483 #ifdef DLT_JUNIPER_FRELAY
1484     case DLT_JUNIPER_FRELAY:
1485         break;
1486 #endif
1487 
1488     default:
1489         ND_PRINT((ndo, "Unknown Juniper DLT_ type %u: ", l2info->pictype));
1490         break;
1491     }
1492 
1493     if (ndo->ndo_eflag > 1)
1494         ND_PRINT((ndo, "hlen %u, proto 0x%04x, ", l2info->header_len, l2info->proto));
1495 
1496     return 1; /* everything went ok so far. continue parsing */
1497  trunc:
1498     ND_PRINT((ndo, "[|juniper_hdr], length %u", h->len));
1499     return 0;
1500 }
1501 
1502 
1503 /*
1504  * Local Variables:
1505  * c-style: whitesmith
1506  * c-basic-offset: 4
1507  * End:
1508  */
1509