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Diffstat (limited to 'contrib/tcpdump/print-arp.c')
-rw-r--r-- | contrib/tcpdump/print-arp.c | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/contrib/tcpdump/print-arp.c b/contrib/tcpdump/print-arp.c deleted file mode 100644 index 68e9dc6..0000000 --- a/contrib/tcpdump/print-arp.c +++ /dev/null @@ -1,341 +0,0 @@ -/* - * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that: (1) source code distributions - * retain the above copyright notice and this paragraph in its entirety, (2) - * distributions including binary code include the above copyright notice and - * this paragraph in its entirety in the documentation or other materials - * provided with the distribution, and (3) all advertising materials mentioning - * features or use of this software display the following acknowledgement: - * ``This product includes software developed by the University of California, - * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of - * the University nor the names of its contributors may be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-arp.c,v 1.64 2004/04/30 16:42:14 mcr Exp $ (LBL)"; -#endif - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include <tcpdump-stdinc.h> - -#include <stdio.h> -#include <string.h> - -#include "netdissect.h" -#include "addrtoname.h" -#include "ether.h" -#include "ethertype.h" -#include "extract.h" /* must come after interface.h */ - -/* - * Address Resolution Protocol. - * - * See RFC 826 for protocol description. ARP packets are variable - * in size; the arphdr structure defines the fixed-length portion. - * Protocol type values are the same as those for 10 Mb/s Ethernet. - * It is followed by the variable-sized fields ar_sha, arp_spa, - * arp_tha and arp_tpa in that order, according to the lengths - * specified. Field names used correspond to RFC 826. - */ -struct arp_pkthdr { - u_short ar_hrd; /* format of hardware address */ -#define ARPHRD_ETHER 1 /* ethernet hardware format */ -#define ARPHRD_IEEE802 6 /* token-ring hardware format */ -#define ARPHRD_ARCNET 7 /* arcnet hardware format */ -#define ARPHRD_FRELAY 15 /* frame relay hardware format */ -#define ARPHRD_STRIP 23 /* Ricochet Starmode Radio hardware format */ -#define ARPHRD_IEEE1394 24 /* IEEE 1394 (FireWire) hardware format */ - u_short ar_pro; /* format of protocol address */ - u_char ar_hln; /* length of hardware address */ - u_char ar_pln; /* length of protocol address */ - u_short ar_op; /* one of: */ -#define ARPOP_REQUEST 1 /* request to resolve address */ -#define ARPOP_REPLY 2 /* response to previous request */ -#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ -#define ARPOP_REVREPLY 4 /* response giving protocol address */ -#define ARPOP_INVREQUEST 8 /* request to identify peer */ -#define ARPOP_INVREPLY 9 /* response identifying peer */ -/* - * The remaining fields are variable in size, - * according to the sizes above. - */ -#ifdef COMMENT_ONLY - u_char ar_sha[]; /* sender hardware address */ - u_char ar_spa[]; /* sender protocol address */ - u_char ar_tha[]; /* target hardware address */ - u_char ar_tpa[]; /* target protocol address */ -#endif -#define ar_sha(ap) (((const u_char *)((ap)+1))+0) -#define ar_spa(ap) (((const u_char *)((ap)+1))+ (ap)->ar_hln) -#define ar_tha(ap) (((const u_char *)((ap)+1))+ (ap)->ar_hln+(ap)->ar_pln) -#define ar_tpa(ap) (((const u_char *)((ap)+1))+2*(ap)->ar_hln+(ap)->ar_pln) -}; - -#define ARP_HDRLEN 8 - -#define HRD(ap) EXTRACT_16BITS(&(ap)->ar_hrd) -#define HLN(ap) ((ap)->ar_hln) -#define PLN(ap) ((ap)->ar_pln) -#define OP(ap) EXTRACT_16BITS(&(ap)->ar_op) -#define PRO(ap) EXTRACT_16BITS(&(ap)->ar_pro) -#define SHA(ap) (ar_sha(ap)) -#define SPA(ap) (ar_spa(ap)) -#define THA(ap) (ar_tha(ap)) -#define TPA(ap) (ar_tpa(ap)) - -/* - * ATM Address Resolution Protocol. - * - * See RFC 2225 for protocol description. ATMARP packets are similar - * to ARP packets, except that there are no length fields for the - * protocol address - instead, there are type/length fields for - * the ATM number and subaddress - and the hardware addresses consist - * of an ATM number and an ATM subaddress. - */ -struct atmarp_pkthdr { - u_short aar_hrd; /* format of hardware address */ -#define ARPHRD_ATM2225 19 /* ATM (RFC 2225) */ - u_short aar_pro; /* format of protocol address */ - u_char aar_shtl; /* length of source ATM number */ - u_char aar_sstl; /* length of source ATM subaddress */ -#define ATMARP_IS_E164 0x40 /* bit in type/length for E.164 format */ -#define ATMARP_LEN_MASK 0x3F /* length of {sub}address in type/length */ - u_short aar_op; /* same as regular ARP */ -#define ATMARPOP_NAK 10 /* NAK */ - u_char aar_spln; /* length of source protocol address */ - u_char aar_thtl; /* length of target ATM number */ - u_char aar_tstl; /* length of target ATM subaddress */ - u_char aar_tpln; /* length of target protocol address */ -/* - * The remaining fields are variable in size, - * according to the sizes above. - */ -#ifdef COMMENT_ONLY - u_char aar_sha[]; /* source ATM number */ - u_char aar_ssa[]; /* source ATM subaddress */ - u_char aar_spa[]; /* sender protocol address */ - u_char aar_tha[]; /* target ATM number */ - u_char aar_tsa[]; /* target ATM subaddress */ - u_char aar_tpa[]; /* target protocol address */ -#endif - -#define ATMHRD(ap) EXTRACT_16BITS(&(ap)->aar_hrd) -#define ATMSHLN(ap) ((ap)->aar_shtl & ATMARP_LEN_MASK) -#define ATMSSLN(ap) ((ap)->aar_sstl & ATMARP_LEN_MASK) -#define ATMSPLN(ap) ((ap)->aar_spln) -#define ATMOP(ap) EXTRACT_16BITS(&(ap)->aar_op) -#define ATMPRO(ap) EXTRACT_16BITS(&(ap)->aar_pro) -#define ATMTHLN(ap) ((ap)->aar_thtl & ATMARP_LEN_MASK) -#define ATMTSLN(ap) ((ap)->aar_tstl & ATMARP_LEN_MASK) -#define ATMTPLN(ap) ((ap)->aar_tpln) -#define aar_sha(ap) ((const u_char *)((ap)+1)) -#define aar_ssa(ap) (aar_sha(ap) + ATMSHLN(ap)) -#define aar_spa(ap) (aar_ssa(ap) + ATMSSLN(ap)) -#define aar_tha(ap) (aar_spa(ap) + ATMSPLN(ap)) -#define aar_tsa(ap) (aar_tha(ap) + ATMTHLN(ap)) -#define aar_tpa(ap) (aar_tsa(ap) + ATMTSLN(ap)) -}; - -#define ATMSHA(ap) (aar_sha(ap)) -#define ATMSSA(ap) (aar_ssa(ap)) -#define ATMSPA(ap) (aar_spa(ap)) -#define ATMTHA(ap) (aar_tha(ap)) -#define ATMTSA(ap) (aar_tsa(ap)) -#define ATMTPA(ap) (aar_tpa(ap)) - -static u_char ezero[6]; - -static void -atmarp_addr_print(netdissect_options *ndo, - const u_char *ha, u_int ha_len, const u_char *srca, - u_int srca_len) -{ - if (ha_len == 0) - ND_PRINT((ndo, "<No address>")); - else { - ND_PRINT((ndo, "%s", linkaddr_string(ha, ha_len))); - if (srca_len != 0) - ND_PRINT((ndo, ",%s", - linkaddr_string(srca, srca_len))); - } -} - -static void -atmarp_print(netdissect_options *ndo, - const u_char *bp, u_int length, u_int caplen) -{ - const struct atmarp_pkthdr *ap; - u_short pro, hrd, op; - - ap = (const struct atmarp_pkthdr *)bp; - ND_TCHECK(*ap); - - hrd = ATMHRD(ap); - pro = ATMPRO(ap); - op = ATMOP(ap); - - if (!ND_TTEST2(*aar_tpa(ap), ATMTPLN(ap))) { - ND_PRINT((ndo, "truncated-atmarp")); - ND_DEFAULTPRINT((const u_char *)ap, length); - return; - } - - if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL) || - ATMSPLN(ap) != 4 || ATMTPLN(ap) != 4) { - ND_PRINT((ndo, "atmarp-#%d for proto #%d (%d/%d) hardware #%d", - op, pro, ATMSPLN(ap), ATMTPLN(ap), hrd)); - return; - } - if (pro == ETHERTYPE_TRAIL) - ND_PRINT((ndo, "trailer-")); - switch (op) { - - case ARPOP_REQUEST: - ND_PRINT((ndo, "arp who-has %s", ipaddr_string(ATMTPA(ap)))); - if (ATMTHLN(ap) != 0) { - ND_PRINT((ndo, " (")); - atmarp_addr_print(ndo, ATMTHA(ap), ATMTHLN(ap), - ATMTSA(ap), ATMTSLN(ap)); - ND_PRINT((ndo, ")")); - } - ND_PRINT((ndo, " tell %s", ipaddr_string(ATMSPA(ap)))); - break; - - case ARPOP_REPLY: - ND_PRINT((ndo, "arp reply %s", ipaddr_string(ATMSPA(ap)))); - ND_PRINT((ndo, " is-at ")); - atmarp_addr_print(ndo, ATMSHA(ap), ATMSHLN(ap), ATMSSA(ap), - ATMSSLN(ap)); - break; - - case ARPOP_INVREQUEST: - ND_PRINT((ndo, "invarp who-is ")); - atmarp_addr_print(ndo, ATMTHA(ap), ATMTHLN(ap), ATMTSA(ap), - ATMTSLN(ap)); - ND_PRINT((ndo, " tell ")); - atmarp_addr_print(ndo, ATMSHA(ap), ATMSHLN(ap), ATMSSA(ap), - ATMSSLN(ap)); - break; - - case ARPOP_INVREPLY: - ND_PRINT((ndo, "invarp reply ")); - atmarp_addr_print(ndo, ATMSHA(ap), ATMSHLN(ap), ATMSSA(ap), - ATMSSLN(ap)); - ND_PRINT((ndo, " at %s", ipaddr_string(ATMSPA(ap)))); - break; - - case ATMARPOP_NAK: - ND_PRINT((ndo, "nak reply for %s", - ipaddr_string(ATMSPA(ap)))); - break; - - default: - ND_PRINT((ndo, "atmarp-#%d", op)); - ND_DEFAULTPRINT((const u_char *)ap, caplen); - return; - } - return; -trunc: - ND_PRINT((ndo, "[|atmarp]")); -} - -void -arp_print(netdissect_options *ndo, - const u_char *bp, u_int length, u_int caplen) -{ - const struct arp_pkthdr *ap; - u_short pro, hrd, op; - - ap = (const struct arp_pkthdr *)bp; - ND_TCHECK(*ap); - hrd = HRD(ap); - if (hrd == ARPHRD_ATM2225) { - atmarp_print(ndo, bp, length, caplen); - return; - } - pro = PRO(ap); - op = OP(ap); - - if (!ND_TTEST2(*ar_tpa(ap), PLN(ap))) { - ND_PRINT((ndo, "truncated-arp")); - ND_DEFAULTPRINT((const u_char *)ap, length); - return; - } - - if ((pro != ETHERTYPE_IP && pro != ETHERTYPE_TRAIL) || - PLN(ap) != 4 || HLN(ap) == 0) { - ND_PRINT((ndo, "arp-#%d for proto #%d (%d) hardware #%d (%d)", - op, pro, PLN(ap), hrd, HLN(ap))); - return; - } - if (pro == ETHERTYPE_TRAIL) - ND_PRINT((ndo, "trailer-")); - switch (op) { - - case ARPOP_REQUEST: - ND_PRINT((ndo, "arp who-has %s", ipaddr_string(TPA(ap)))); - if (memcmp((const char *)ezero, (const char *)THA(ap), HLN(ap)) != 0) - ND_PRINT((ndo, " (%s)", - linkaddr_string(THA(ap), HLN(ap)))); - ND_PRINT((ndo, " tell %s", ipaddr_string(SPA(ap)))); - break; - - case ARPOP_REPLY: - ND_PRINT((ndo, "arp reply %s", ipaddr_string(SPA(ap)))); - ND_PRINT((ndo, " is-at %s", linkaddr_string(SHA(ap), HLN(ap)))); - break; - - case ARPOP_REVREQUEST: - ND_PRINT((ndo, "rarp who-is %s tell %s", - linkaddr_string(THA(ap), HLN(ap)), - linkaddr_string(SHA(ap), HLN(ap)))); - break; - - case ARPOP_REVREPLY: - ND_PRINT((ndo, "rarp reply %s at %s", - linkaddr_string(THA(ap), HLN(ap)), - ipaddr_string(TPA(ap)))); - break; - - case ARPOP_INVREQUEST: - ND_PRINT((ndo, "invarp who-is %s tell %s", - linkaddr_string(THA(ap), HLN(ap)), - linkaddr_string(SHA(ap), HLN(ap)))); - break; - - case ARPOP_INVREPLY: - ND_PRINT((ndo,"invarp reply %s at %s", - linkaddr_string(THA(ap), HLN(ap)), - ipaddr_string(TPA(ap)))); - break; - - default: - ND_PRINT((ndo, "arp-#%d", op)); - ND_DEFAULTPRINT((const u_char *)ap, caplen); - return; - } - if (hrd != ARPHRD_ETHER) - ND_PRINT((ndo, " hardware #%d", hrd)); - return; -trunc: - ND_PRINT((ndo, "[|arp]")); -} - -/* - * Local Variables: - * c-style: bsd - * End: - */ - |