2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
| 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
|
3 * The Regents of the University of California. All rights reserved.
4 *
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
16 * written permission.
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.
20 */
21
22#ifndef lint
23static const char rcsid[] =
| 3 * The Regents of the University of California. All rights reserved.
4 *
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
16 * written permission.
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.
20 */
21
22#ifndef lint
23static const char rcsid[] =
|
41#include <stdio.h>
42#include <string.h>
43
44#include "interface.h"
45#include "addrtoname.h"
46#include "ethertype.h"
47#include "extract.h" /* must come after interface.h */
48
49/* Compatibility */
50#ifndef REVARP_REQUEST
51#define REVARP_REQUEST 3
52#endif
53#ifndef REVARP_REPLY
54#define REVARP_REPLY 4
55#endif
56
57static u_char ezero[6];
58
59void
60arp_print(register const u_char *bp, u_int length, u_int caplen)
61{
62 register const struct ether_arp *ap;
63 register const struct ether_header *eh;
64 register u_short pro, hrd, op;
65
66 ap = (struct ether_arp *)bp;
67 if ((u_char *)(ap + 1) > snapend) {
68 printf("[|arp]");
69 return;
70 }
71 if (length < sizeof(struct ether_arp)) {
72 (void)printf("truncated-arp");
73 default_print((u_char *)ap, length);
74 return;
75 }
76
77 pro = EXTRACT_16BITS(&ap->arp_pro);
78 hrd = EXTRACT_16BITS(&ap->arp_hrd);
79 op = EXTRACT_16BITS(&ap->arp_op);
80
81 if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
82 || ap->arp_hln != sizeof(SHA(ap))
83 || ap->arp_pln != sizeof(SPA(ap))) {
84 (void)printf("arp-#%d for proto #%d (%d) hardware #%d (%d)",
85 op, pro, ap->arp_pln,
86 hrd, ap->arp_hln);
87 return;
88 }
89 if (pro == ETHERTYPE_TRAIL)
90 (void)printf("trailer-");
91 eh = (struct ether_header *)packetp;
92 switch (op) {
93
94 case ARPOP_REQUEST:
95 (void)printf("arp who-has %s", ipaddr_string(TPA(ap)));
96 if (memcmp((char *)ezero, (char *)THA(ap), 6) != 0)
97 (void)printf(" (%s)", etheraddr_string(THA(ap)));
98 (void)printf(" tell %s", ipaddr_string(SPA(ap)));
99 if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
100 (void)printf(" (%s)", etheraddr_string(SHA(ap)));
101 break;
102
103 case ARPOP_REPLY:
104 (void)printf("arp reply %s", ipaddr_string(SPA(ap)));
105 if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
106 (void)printf(" (%s)", etheraddr_string(SHA(ap)));
107 (void)printf(" is-at %s", etheraddr_string(SHA(ap)));
108 if (memcmp((char *)EDST(eh), (char *)THA(ap), 6) != 0)
109 (void)printf(" (%s)", etheraddr_string(THA(ap)));
110 break;
111
112 case REVARP_REQUEST:
113 (void)printf("rarp who-is %s tell %s",
114 etheraddr_string(THA(ap)),
115 etheraddr_string(SHA(ap)));
116 break;
117
118 case REVARP_REPLY:
119 (void)printf("rarp reply %s at %s",
120 etheraddr_string(THA(ap)),
121 ipaddr_string(TPA(ap)));
122 break;
123
124 default:
125 (void)printf("arp-#%d", op);
126 default_print((u_char *)ap, caplen);
127 return;
128 }
129 if (hrd != ARPHRD_ETHER)
130 printf(" hardware #%d", hrd);
131}
| 44#include <stdio.h>
45#include <string.h>
46
47#include "interface.h"
48#include "addrtoname.h"
49#include "ethertype.h"
50#include "extract.h" /* must come after interface.h */
51
52/* Compatibility */
53#ifndef REVARP_REQUEST
54#define REVARP_REQUEST 3
55#endif
56#ifndef REVARP_REPLY
57#define REVARP_REPLY 4
58#endif
59
60static u_char ezero[6];
61
62void
63arp_print(register const u_char *bp, u_int length, u_int caplen)
64{
65 register const struct ether_arp *ap;
66 register const struct ether_header *eh;
67 register u_short pro, hrd, op;
68
69 ap = (struct ether_arp *)bp;
70 if ((u_char *)(ap + 1) > snapend) {
71 printf("[|arp]");
72 return;
73 }
74 if (length < sizeof(struct ether_arp)) {
75 (void)printf("truncated-arp");
76 default_print((u_char *)ap, length);
77 return;
78 }
79
80 pro = EXTRACT_16BITS(&ap->arp_pro);
81 hrd = EXTRACT_16BITS(&ap->arp_hrd);
82 op = EXTRACT_16BITS(&ap->arp_op);
83
84 if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL)
85 || ap->arp_hln != sizeof(SHA(ap))
86 || ap->arp_pln != sizeof(SPA(ap))) {
87 (void)printf("arp-#%d for proto #%d (%d) hardware #%d (%d)",
88 op, pro, ap->arp_pln,
89 hrd, ap->arp_hln);
90 return;
91 }
92 if (pro == ETHERTYPE_TRAIL)
93 (void)printf("trailer-");
94 eh = (struct ether_header *)packetp;
95 switch (op) {
96
97 case ARPOP_REQUEST:
98 (void)printf("arp who-has %s", ipaddr_string(TPA(ap)));
99 if (memcmp((char *)ezero, (char *)THA(ap), 6) != 0)
100 (void)printf(" (%s)", etheraddr_string(THA(ap)));
101 (void)printf(" tell %s", ipaddr_string(SPA(ap)));
102 if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
103 (void)printf(" (%s)", etheraddr_string(SHA(ap)));
104 break;
105
106 case ARPOP_REPLY:
107 (void)printf("arp reply %s", ipaddr_string(SPA(ap)));
108 if (memcmp((char *)ESRC(eh), (char *)SHA(ap), 6) != 0)
109 (void)printf(" (%s)", etheraddr_string(SHA(ap)));
110 (void)printf(" is-at %s", etheraddr_string(SHA(ap)));
111 if (memcmp((char *)EDST(eh), (char *)THA(ap), 6) != 0)
112 (void)printf(" (%s)", etheraddr_string(THA(ap)));
113 break;
114
115 case REVARP_REQUEST:
116 (void)printf("rarp who-is %s tell %s",
117 etheraddr_string(THA(ap)),
118 etheraddr_string(SHA(ap)));
119 break;
120
121 case REVARP_REPLY:
122 (void)printf("rarp reply %s at %s",
123 etheraddr_string(THA(ap)),
124 ipaddr_string(TPA(ap)));
125 break;
126
127 default:
128 (void)printf("arp-#%d", op);
129 default_print((u_char *)ap, caplen);
130 return;
131 }
132 if (hrd != ARPHRD_ETHER)
133 printf(" hardware #%d", hrd);
134}
|