2 * Copyright (c) 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
24 #define NETDISSECT_REWORKED
29 #include <tcpdump-stdinc.h>
31 #include "interface.h"
33 #include "addrtoname.h"
38 static const char tstr[] = "[|atm]";
40 #define OAM_CRC10_MASK 0x3ff
41 #define OAM_PAYLOAD_LEN 48
42 #define OAM_FUNCTION_SPECIFIC_LEN 45 /* this excludes crc10 and cell-type/function-type */
43 #define OAM_CELLTYPE_FUNCTYPE_LEN 1
45 static const struct tok oam_f_values[] = {
46 { VCI_OAMF4SC, "OAM F4 (segment)" },
47 { VCI_OAMF4EC, "OAM F4 (end)" },
51 static const struct tok atm_pty_values[] = {
52 { 0x0, "user data, uncongested, SDU 0" },
53 { 0x1, "user data, uncongested, SDU 1" },
54 { 0x2, "user data, congested, SDU 0" },
55 { 0x3, "user data, congested, SDU 1" },
56 { 0x4, "VCC OAM F5 flow segment" },
57 { 0x5, "VCC OAM F5 flow end-to-end" },
58 { 0x6, "Traffic Control and resource Mgmt" },
62 #define OAM_CELLTYPE_FM 0x1
63 #define OAM_CELLTYPE_PM 0x2
64 #define OAM_CELLTYPE_AD 0x8
65 #define OAM_CELLTYPE_SM 0xf
67 static const struct tok oam_celltype_values[] = {
68 { OAM_CELLTYPE_FM, "Fault Management" },
69 { OAM_CELLTYPE_PM, "Performance Management" },
70 { OAM_CELLTYPE_AD, "activate/deactivate" },
71 { OAM_CELLTYPE_SM, "System Management" },
75 #define OAM_FM_FUNCTYPE_AIS 0x0
76 #define OAM_FM_FUNCTYPE_RDI 0x1
77 #define OAM_FM_FUNCTYPE_CONTCHECK 0x4
78 #define OAM_FM_FUNCTYPE_LOOPBACK 0x8
80 static const struct tok oam_fm_functype_values[] = {
81 { OAM_FM_FUNCTYPE_AIS, "AIS" },
82 { OAM_FM_FUNCTYPE_RDI, "RDI" },
83 { OAM_FM_FUNCTYPE_CONTCHECK, "Continuity Check" },
84 { OAM_FM_FUNCTYPE_LOOPBACK, "Loopback" },
88 static const struct tok oam_pm_functype_values[] = {
89 { 0x0, "Forward Monitoring" },
90 { 0x1, "Backward Reporting" },
91 { 0x2, "Monitoring and Reporting" },
95 static const struct tok oam_ad_functype_values[] = {
96 { 0x0, "Performance Monitoring" },
97 { 0x1, "Continuity Check" },
101 #define OAM_FM_LOOPBACK_INDICATOR_MASK 0x1
103 static const struct tok oam_fm_loopback_indicator_values[] = {
109 static const struct tok *oam_functype_values[16] = {
111 oam_fm_functype_values, /* 1 */
112 oam_pm_functype_values, /* 2 */
118 oam_ad_functype_values, /* 8 */
129 * Print an RFC 1483 LLC-encapsulated ATM frame.
132 atm_llc_print(netdissect_options *ndo,
133 const u_char *p, int length, int caplen)
135 u_short extracted_ethertype;
137 if (!llc_print(ndo, p, length, caplen, NULL, NULL,
138 &extracted_ethertype)) {
139 /* ether_type not known, print raw packet */
140 if (extracted_ethertype) {
141 ND_PRINT((ndo, "(LLC %s) ",
142 etherproto_string(htons(extracted_ethertype))));
144 if (!ndo->ndo_suppress_default_print)
145 ND_DEFAULTPRINT(p, caplen);
150 * Given a SAP value, generate the LLC header value for a UI packet
151 * with that SAP as the source and destination SAP.
153 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
156 * This is the top level routine of the printer. 'p' points
157 * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
158 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
159 * is the number of bytes actually captured.
162 atm_if_print(netdissect_options *ndo,
163 const struct pcap_pkthdr *h, const u_char *p)
165 u_int caplen = h->caplen;
166 u_int length = h->len;
170 if (caplen < 1 || length < 1) {
171 ND_PRINT((ndo, "%s", tstr));
175 /* Cisco Style NLPID ? */
178 ND_PRINT((ndo, "CNLPID "));
179 isoclns_print(ndo, p + 1, length - 1, caplen - 1);
184 * Must have at least a DSAP, an SSAP, and the first byte of the
187 if (caplen < 3 || length < 3) {
188 ND_PRINT((ndo, "%s", tstr));
193 * Extract the presumed LLC header into a variable, for quick
195 * Then check for a header that's neither a header for a SNAP
196 * packet nor an RFC 2684 routed NLPID-formatted PDU nor
197 * an 802.2-but-no-SNAP IP packet.
199 llchdr = EXTRACT_24BITS(p);
200 if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
201 llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
202 llchdr != LLC_UI_HDR(LLCSAP_IP)) {
204 * XXX - assume 802.6 MAC header from Fore driver.
206 * Unfortunately, the above list doesn't check for
207 * all known SAPs, doesn't check for headers where
208 * the source and destination SAP aren't the same,
209 * and doesn't check for non-UI frames. It also
210 * runs the risk of an 802.6 MAC header that happens
211 * to begin with one of those values being
212 * incorrectly treated as an 802.2 header.
214 * So is that Fore driver still around? And, if so,
215 * is it still putting 802.6 MAC headers on ATM
216 * packets? If so, could it be changed to use a
217 * new DLT_IEEE802_6 value if we added it?
219 if (caplen < 20 || length < 20) {
220 ND_PRINT((ndo, "%s", tstr));
224 ND_PRINT((ndo, "%08x%08x %08x%08x ",
228 EXTRACT_32BITS(p+12)));
234 atm_llc_print(ndo, p, length, caplen);
241 static const struct tok msgtype2str[] = {
242 { CALL_PROCEED, "Call_proceeding" },
243 { CONNECT, "Connect" },
244 { CONNECT_ACK, "Connect_ack" },
246 { RELEASE, "Release" },
247 { RELEASE_DONE, "Release_complete" },
248 { RESTART, "Restart" },
249 { RESTART_ACK, "Restart_ack" },
250 { STATUS, "Status" },
251 { STATUS_ENQ, "Status_enquiry" },
252 { ADD_PARTY, "Add_party" },
253 { ADD_PARTY_ACK, "Add_party_ack" },
254 { ADD_PARTY_REJ, "Add_party_reject" },
255 { DROP_PARTY, "Drop_party" },
256 { DROP_PARTY_ACK, "Drop_party_ack" },
261 sig_print(netdissect_options *ndo,
262 const u_char *p, int caplen)
266 if (caplen < PROTO_POS) {
267 ND_PRINT((ndo, "%s", tstr));
270 if (p[PROTO_POS] == Q2931) {
272 * protocol:Q.2931 for User to Network Interface
273 * (UNI 3.1) signalling
275 ND_PRINT((ndo, "Q.2931"));
276 if (caplen < MSG_TYPE_POS) {
277 ND_PRINT((ndo, " %s", tstr));
280 ND_PRINT((ndo, ":%s ",
281 tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));
284 * The call reference comes before the message type,
285 * so if we know we have the message type, which we
286 * do from the caplen test above, we also know we have
287 * the call reference.
289 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
290 ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));
292 /* SCCOP with some unknown protocol atop it */
293 ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));
298 * Print an ATM PDU (such as an AAL5 PDU).
301 atm_print(netdissect_options *ndo,
302 u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
306 ND_PRINT((ndo, "VPI:%u VCI:%u ", vpi, vci));
312 sig_print(ndo, p, caplen);
316 ND_PRINT((ndo, "broadcast sig: "));
319 case VCI_OAMF4SC: /* fall through */
321 oam_print(ndo, p, length, ATM_OAM_HEC);
325 ND_PRINT((ndo, "meta: "));
329 ND_PRINT((ndo, "ilmi: "));
330 snmp_print(ndo, p, length);
340 * Assumes traffic is LLC if unknown.
342 atm_llc_print(ndo, p, length, caplen);
346 lane_print(ndo, p, length, caplen);
351 struct oam_fm_loopback_t {
352 uint8_t loopback_indicator;
353 uint8_t correlation_tag[4];
354 uint8_t loopback_id[12];
355 uint8_t source_id[12];
359 struct oam_fm_ais_rdi_t {
360 uint8_t failure_type;
361 uint8_t failure_location[16];
366 oam_print (netdissect_options *ndo,
367 const u_char *p, u_int length, u_int hec)
369 uint32_t cell_header;
370 uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
371 uint8_t cell_type, func_type, payload, clp;
374 const struct oam_fm_loopback_t *oam_fm_loopback;
375 const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
379 cell_header = EXTRACT_32BITS(p+hec);
380 cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f;
381 func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f;
383 vpi = (cell_header>>20)&0xff;
384 vci = (cell_header>>4)&0xffff;
385 payload = (cell_header>>1)&0x7;
386 clp = cell_header&0x1;
388 ND_PRINT((ndo, "%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
389 tok2str(oam_f_values, "OAM F5", vci),
391 tok2str(atm_pty_values, "Unknown", payload),
394 if (!ndo->ndo_vflag) {
398 ND_PRINT((ndo, "\n\tcell-type %s (%u)",
399 tok2str(oam_celltype_values, "unknown", cell_type),
402 if (oam_functype_values[cell_type] == NULL)
403 ND_PRINT((ndo, ", func-type unknown (%u)", func_type));
405 ND_PRINT((ndo, ", func-type %s (%u)",
406 tok2str(oam_functype_values[cell_type],"none",func_type),
409 p += ATM_HDR_LEN_NOHEC + hec;
411 switch (cell_type << 4 | func_type) {
412 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
413 oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
414 ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
415 tok2str(oam_fm_loopback_indicator_values,
417 oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK),
418 EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag)));
419 ND_PRINT((ndo, "\n\tLocation-ID "));
420 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
422 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
425 ND_PRINT((ndo, "\n\tSource-ID "));
426 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
428 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx])));
433 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
434 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
435 oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
436 ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
437 ND_PRINT((ndo, "\n\tLocation-ID "));
438 for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
440 ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
445 case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
453 /* crc10 checksum verification */
454 cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
456 cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
458 ND_PRINT((ndo, "\n\tcksum 0x%03x (%scorrect)",
460 cksum_shouldbe == 0 ? "" : "in"));