print-arp.c (56896) | print-arp.c (75118) |
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1/* 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 --- 4 unchanged lines hidden (view full) --- 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 * | 1/* 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 --- 4 unchanged lines hidden (view full) --- 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 * $FreeBSD: head/contrib/tcpdump/print-arp.c 56896 2000-01-30 01:05:24Z fenner $ | 21 * $FreeBSD: head/contrib/tcpdump/print-arp.c 75118 2001-04-03 07:50:46Z fenner $ |
22 */ 23 24#ifndef lint 25static const char rcsid[] = | 22 */ 23 24#ifndef lint 25static const char rcsid[] = |
26 "@(#) $Header: /tcpdump/master/tcpdump/print-arp.c,v 1.44 1999/11/21 09:36:48 fenner Exp $ (LBL)"; | 26 "@(#) $Header: /tcpdump/master/tcpdump/print-arp.c,v 1.49 2000/10/10 05:05:07 guy Exp $ (LBL)"; |
27#endif 28 29#ifdef HAVE_CONFIG_H 30#include "config.h" 31#endif 32 33#include <sys/param.h> 34#include <sys/time.h> | 27#endif 28 29#ifdef HAVE_CONFIG_H 30#include "config.h" 31#endif 32 33#include <sys/param.h> 34#include <sys/time.h> |
35#include <sys/socket.h> | |
36 | 35 |
37#if __STDC__ 38struct mbuf; 39struct rtentry; 40#endif 41#include <net/if.h> 42#include <net/if_var.h> 43 | |
44#include <netinet/in.h> | 36#include <netinet/in.h> |
45#include <netinet/if_ether.h> | |
46 | 37 |
47#ifdef HAVE_MEMORY_H 48#include <memory.h> 49#endif | |
50#include <stdio.h> 51#include <string.h> 52 53#include "interface.h" 54#include "addrtoname.h" | 38#include <stdio.h> 39#include <string.h> 40 41#include "interface.h" 42#include "addrtoname.h" |
43#include "ether.h" |
|
55#include "ethertype.h" 56#include "extract.h" /* must come after interface.h */ 57 | 44#include "ethertype.h" 45#include "extract.h" /* must come after interface.h */ 46 |
47/* 48 * Address Resolution Protocol. 49 * 50 * See RFC 826 for protocol description. ARP packets are variable 51 * in size; the arphdr structure defines the fixed-length portion. 52 * Protocol type values are the same as those for 10 Mb/s Ethernet. 53 * It is followed by the variable-sized fields ar_sha, arp_spa, 54 * arp_tha and arp_tpa in that order, according to the lengths 55 * specified. Field names used correspond to RFC 826. 56 */ 57struct arphdr { 58 u_short ar_hrd; /* format of hardware address */ 59#define ARPHRD_ETHER 1 /* ethernet hardware format */ 60#define ARPHRD_IEEE802 6 /* token-ring hardware format */ 61#define ARPHRD_FRELAY 15 /* frame relay hardware format */ 62 u_short ar_pro; /* format of protocol address */ 63 u_char ar_hln; /* length of hardware address */ 64 u_char ar_pln; /* length of protocol address */ 65 u_short ar_op; /* one of: */ 66#define ARPOP_REQUEST 1 /* request to resolve address */ 67#define ARPOP_REPLY 2 /* response to previous request */ 68#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ 69#define ARPOP_REVREPLY 4 /* response giving protocol address */ 70#define ARPOP_INVREQUEST 8 /* request to identify peer */ 71#define ARPOP_INVREPLY 9 /* response identifying peer */ 72/* 73 * The remaining fields are variable in size, 74 * according to the sizes above. 75 */ 76#ifdef COMMENT_ONLY 77 u_char ar_sha[]; /* sender hardware address */ 78 u_char ar_spa[]; /* sender protocol address */ 79 u_char ar_tha[]; /* target hardware address */ 80 u_char ar_tpa[]; /* target protocol address */ 81#endif 82}; 83 84#define ARP_HDRLEN 8 85 86/* 87 * Ethernet Address Resolution Protocol. 88 * 89 * See RFC 826 for protocol description. Structure below is adapted 90 * to resolving internet addresses. Field names used correspond to 91 * RFC 826. 92 */ 93struct ether_arp { 94 struct arphdr ea_hdr; /* fixed-size header */ 95 u_char arp_sha[6]; /* sender hardware address */ 96 u_char arp_spa[4]; /* sender protocol address */ 97 u_char arp_tha[6]; /* target hardware address */ 98 u_char arp_tpa[4]; /* target protocol address */ 99}; 100#define arp_hrd ea_hdr.ar_hrd 101#define arp_pro ea_hdr.ar_pro 102#define arp_hln ea_hdr.ar_hln 103#define arp_pln ea_hdr.ar_pln 104#define arp_op ea_hdr.ar_op 105 106#define ETHER_ARP_HDRLEN (ARP_HDRLEN + 6 + 4 + 6 + 4) 107 108#define SHA(ap) ((ap)->arp_sha) 109#define THA(ap) ((ap)->arp_tha) 110#define SPA(ap) ((ap)->arp_spa) 111#define TPA(ap) ((ap)->arp_tpa) 112 |
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58/* Compatibility */ 59#ifndef REVARP_REQUEST 60#define REVARP_REQUEST 3 61#endif 62#ifndef REVARP_REPLY 63#define REVARP_REPLY 4 64#endif 65 --- 6 unchanged lines hidden (view full) --- 72 register const struct ether_header *eh; 73 register u_short pro, hrd, op; 74 75 ap = (struct ether_arp *)bp; 76 if ((u_char *)(ap + 1) > snapend) { 77 printf("[|arp]"); 78 return; 79 } | 113/* Compatibility */ 114#ifndef REVARP_REQUEST 115#define REVARP_REQUEST 3 116#endif 117#ifndef REVARP_REPLY 118#define REVARP_REPLY 4 119#endif 120 --- 6 unchanged lines hidden (view full) --- 127 register const struct ether_header *eh; 128 register u_short pro, hrd, op; 129 130 ap = (struct ether_arp *)bp; 131 if ((u_char *)(ap + 1) > snapend) { 132 printf("[|arp]"); 133 return; 134 } |
80 if (length < sizeof(struct ether_arp)) { | 135 if (length < ETHER_ARP_HDRLEN) { |
81 (void)printf("truncated-arp"); 82 default_print((u_char *)ap, length); 83 return; 84 } 85 86 pro = EXTRACT_16BITS(&ap->arp_pro); 87 hrd = EXTRACT_16BITS(&ap->arp_hrd); 88 op = EXTRACT_16BITS(&ap->arp_op); --- 52 unchanged lines hidden --- | 136 (void)printf("truncated-arp"); 137 default_print((u_char *)ap, length); 138 return; 139 } 140 141 pro = EXTRACT_16BITS(&ap->arp_pro); 142 hrd = EXTRACT_16BITS(&ap->arp_hrd); 143 op = EXTRACT_16BITS(&ap->arp_op); --- 52 unchanged lines hidden --- |