1 /* $OpenBSD: print-atm.c,v 1.15 2021/12/01 18:28:45 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 1994, 1995, 1996, 1997
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that: (1) source code distributions
9 * retain the above copyright notice and this paragraph in its entirety, (2)
10 * distributions including binary code include the above copyright notice and
11 * this paragraph in its entirety in the documentation or other materials
12 * provided with the distribution, and (3) all advertising materials mentioning
13 * features or use of this software display the following acknowledgement:
14 * ``This product includes software developed by the University of California,
15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16 * the University nor the names of its contributors may be used to endorse
17 * or promote products derived from this software without specific prior
18 * written permission.
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 */
23
24 #include <sys/time.h>
25 #include <sys/socket.h>
26
27 #include <net/if.h>
28
29 #include <netinet/in.h>
30 #include <netinet/if_ether.h>
31 #include <netinet/ip.h>
32 #include <netinet/ip_var.h>
33 #include <netinet/udp.h>
34 #include <netinet/udp_var.h>
35 #include <netinet/tcp.h>
36
37 #include <stdio.h>
38 #include <pcap.h>
39
40 #include "interface.h"
41 #include "addrtoname.h"
42 #include "ethertype.h"
43
44 /*
45 * This is the top level routine of the printer. 'p' is the points
46 * to the LLC/SNAP header of the packet, 'tvp' is the timestamp,
47 * 'length' is the length of the packet off the wire, and 'caplen'
48 * is the number of bytes actually captured.
49 */
50 void
atm_if_print(u_char * user,const struct pcap_pkthdr * h,const u_char * p)51 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
52 {
53 u_int caplen = h->caplen;
54 u_int length = h->len;
55 u_short ethertype;
56
57 ts_print(&h->ts);
58
59 if (caplen < 8) {
60 printf("[|atm]");
61 goto out;
62 }
63 if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) {
64 /*XXX assume 802.6 MAC header from fore driver */
65 #define MIN_ATM_8026_HDRLEN (20 + 8)
66 if (caplen < MIN_ATM_8026_HDRLEN) {
67 printf("[|atm]");
68 goto out;
69 }
70 if (eflag)
71 printf("%04x%04x %04x%04x ",
72 p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3],
73 p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7],
74 p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11],
75 p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]);
76 p += 20;
77 length -= 20;
78 caplen -= 20;
79 }
80 ethertype = p[6] << 8 | p[7];
81 if (eflag)
82 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
83 p[0], p[1], p[2], /* dsap/ssap/ctrl */
84 p[3], p[4], p[5], /* manufacturer's code */
85 ethertype);
86
87 /*
88 * Some printers want to get back at the ethernet addresses,
89 * and/or check that they're not walking off the end of the packet.
90 * Rather than pass them all the way down, we set these globals.
91 */
92 packetp = p;
93 snapend = p + caplen;
94
95 length -= 8;
96 caplen -= 8;
97 p += 8;
98
99 switch (ethertype) {
100
101 case ETHERTYPE_IP:
102 ip_print(p, length);
103 break;
104
105 case ETHERTYPE_IPV6:
106 ip6_print(p, length);
107 break;
108
109 /*XXX this probably isn't right */
110 case ETHERTYPE_ARP:
111 case ETHERTYPE_REVARP:
112 arp_print(p, length, caplen);
113 break;
114 #ifdef notyet
115 case ETHERTYPE_DN:
116 decnet_print(p, length, caplen);
117 break;
118
119 case ETHERTYPE_ATALK:
120 if (vflag)
121 printf("et1 ");
122 atalk_print(p, length);
123 break;
124
125 case ETHERTYPE_AARP:
126 aarp_print(p, length);
127 break;
128
129 case ETHERTYPE_LAT:
130 case ETHERTYPE_MOPRC:
131 case ETHERTYPE_MOPDL:
132 /* default_print for now */
133 #endif
134 default:
135 /* ether_type not known, print raw packet */
136 if (!eflag)
137 printf("%02x %02x %02x %02x-%02x-%02x %04x: ",
138 p[0], p[1], p[2], /* dsap/ssap/ctrl */
139 p[3], p[4], p[5], /* manufacturer's code */
140 ethertype);
141 if (!xflag && !qflag)
142 default_print(p, caplen);
143 }
144 if (xflag)
145 default_print(p, caplen);
146 out:
147 putchar('\n');
148 }
149