2 * Copyright (c) 1994, 1995, 1996, 1997
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6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
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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 static const char rcsid[] _U_ =
25 "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.33.2.2 2003/11/16 08:51:11 guy Exp $ (LBL)";
32 #include <tcpdump-stdinc.h>
38 #include "interface.h"
40 #include "addrtoname.h"
41 #include "ethertype.h"
49 * Print an RFC 1483 LLC-encapsulated ATM frame.
52 atm_llc_print(const u_char *p, int length, int caplen)
54 u_short extracted_ethertype;
56 if (!llc_print(p, length, caplen, NULL, NULL,
57 &extracted_ethertype)) {
58 /* ether_type not known, print raw packet */
59 if (extracted_ethertype) {
61 etherproto_string(htons(extracted_ethertype)));
64 default_print(p, caplen);
69 * Given a SAP value, generate the LLC header value for a UI packet
70 * with that SAP as the source and destination SAP.
72 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
75 * This is the top level routine of the printer. 'p' points
76 * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
77 * 'h->length' is the length of the packet off the wire, and 'h->caplen'
78 * is the number of bytes actually captured.
81 atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
83 u_int caplen = h->caplen;
84 u_int length = h->len;
93 * Extract the presumed LLC header into a variable, for quick
95 * Then check for a header that's neither a header for a SNAP
96 * packet nor an RFC 2684 routed NLPID-formatted PDU nor
97 * an 802.2-but-no-SNAP IP packet.
99 llchdr = EXTRACT_24BITS(p);
100 if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
101 llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
102 llchdr != LLC_UI_HDR(LLCSAP_IP)) {
104 * XXX - assume 802.6 MAC header from Fore driver.
106 * Unfortunately, the above list doesn't check for
107 * all known SAPs, doesn't check for headers where
108 * the source and destination SAP aren't the same,
109 * and doesn't check for non-UI frames. It also
110 * runs the risk of an 802.6 MAC header that happens
111 * to begin with one of those values being
112 * incorrectly treated as an 802.2 header.
114 * So is that Fore driver still around? And, if so,
115 * is it still putting 802.6 MAC headers on ATM
116 * packets? If so, could it be changed to use a
117 * new DLT_IEEE802_6 value if we added it?
120 printf("%08x%08x %08x%08x ",
124 EXTRACT_32BITS(p+12));
130 atm_llc_print(p, length, caplen);
137 static struct tok msgtype2str[] = {
138 { CALL_PROCEED, "Call_proceeding" },
139 { CONNECT, "Connect" },
140 { CONNECT_ACK, "Connect_ack" },
142 { RELEASE, "Release" },
143 { RELEASE_DONE, "Release_complete" },
144 { RESTART, "Restart" },
145 { RESTART_ACK, "Restart_ack" },
146 { STATUS, "Status" },
147 { STATUS_ENQ, "Status_enquiry" },
148 { ADD_PARTY, "Add_party" },
149 { ADD_PARTY_ACK, "Add_party_ack" },
150 { ADD_PARTY_REJ, "Add_party_reject" },
151 { DROP_PARTY, "Drop_party" },
152 { DROP_PARTY_ACK, "Drop_party_ack" },
157 sig_print(const u_char *p, int caplen)
159 bpf_u_int32 call_ref;
161 if (caplen < PROTO_POS) {
165 if (p[PROTO_POS] == Q2931) {
167 * protocol:Q.2931 for User to Network Interface
168 * (UNI 3.1) signalling
171 if (caplen < MSG_TYPE_POS) {
176 tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
178 if (caplen < CALL_REF_POS+3) {
182 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
183 printf("CALL_REF:0x%06x", call_ref);
185 /* SCCOP with some unknown protocol atop it */
186 printf("SSCOP, proto %d ", p[PROTO_POS]);
191 * Print an ATM PDU (such as an AAL5 PDU).
194 atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
198 printf("VPI:%u VCI:%u ", vpi, vci);
204 sig_print(p, caplen);
208 printf("broadcast sig: ");
212 printf("oamF4(segment): ");
216 printf("oamF4(end): ");
225 snmp_print(p, length);
235 * Assumes traffic is LLC if unknown.
237 atm_llc_print(p, length, caplen);
241 lane_print(p, length, caplen);