/* $NetBSD: print-frag6.c,v 1.4 2004/09/27 23:04:24 dyoung Exp $ */ /* * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 * 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. */ #include #ifndef lint #if 0 static const char rcsid[] _U_ = "@(#) Header: /tcpdump/master/tcpdump/print-frag6.c,v 1.16.2.3 2003/11/19 00:35:43 guy Exp"; #else __RCSID("$NetBSD: print-frag6.c,v 1.4 2004/09/27 23:04:24 dyoung Exp $"); #endif #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef INET6 #include #include #include "ip6.h" #include "interface.h" #include "addrtoname.h" #include "extract.h" int frag6_print(register const u_char *bp, register const u_char *bp2) { register const struct ip6_frag *dp; register const struct ip6_hdr *ip6; register const u_char *ep; #if 0 #define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc #endif dp = (const struct ip6_frag *)bp; ip6 = (const struct ip6_hdr *)bp2; /* 'ep' points to the end of available data. */ ep = snapend; TCHECK(dp->ip6f_offlg); if (vflag) { printf("frag (0x%08x:%d|%ld)", EXTRACT_32BITS(&dp->ip6f_ident), EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK, sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) - (long)(bp - bp2) - sizeof(struct ip6_frag)); } else { printf("frag (%d|%ld)", EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK, sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) - (long)(bp - bp2) - sizeof(struct ip6_frag)); } #if 1 /* it is meaningless to decode non-first fragment */ if ((EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK) != 0) return -1; else #endif { fputs(" ", stdout); return sizeof(struct ip6_frag); } trunc: fputs("[|frag]", stdout); return -1; #undef TCHECK } #endif /* INET6 */