1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 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 23 static const char rcsid[] _U_ = 24 "@(#) $Header: /tcpdump/master/tcpdump/print-frag6.c,v 1.20 2005-04-20 22:33:06 guy Exp $"; 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #ifdef INET6 32 33 #include <tcpdump-stdinc.h> 34 35 #include <stdio.h> 36 37 #include "ip6.h" 38 39 #include "interface.h" 40 #include "addrtoname.h" 41 #include "extract.h" 42 43 int 44 frag6_print(register const u_char *bp, register const u_char *bp2) 45 { 46 register const struct ip6_frag *dp; 47 register const struct ip6_hdr *ip6; 48 49 dp = (const struct ip6_frag *)bp; 50 ip6 = (const struct ip6_hdr *)bp2; 51 52 TCHECK(dp->ip6f_offlg); 53 54 if (vflag) { 55 printf("frag (0x%08x:%d|%ld)", 56 EXTRACT_32BITS(&dp->ip6f_ident), 57 EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK, 58 sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) - 59 (long)(bp - bp2) - sizeof(struct ip6_frag)); 60 } else { 61 printf("frag (%d|%ld)", 62 EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK, 63 sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) - 64 (long)(bp - bp2) - sizeof(struct ip6_frag)); 65 } 66 67 #if 1 68 /* it is meaningless to decode non-first fragment */ 69 if ((EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK) != 0) 70 return -1; 71 else 72 #endif 73 { 74 fputs(" ", stdout); 75 return sizeof(struct ip6_frag); 76 } 77 trunc: 78 fputs("[|frag]", stdout); 79 return -1; 80 #undef TCHECK 81 } 82 #endif /* INET6 */ 83