1b0453382SBill Fenner /* 2b0453382SBill Fenner * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 3b0453382SBill Fenner * The Regents of the University of California. All rights reserved. 4b0453382SBill Fenner * 5b0453382SBill Fenner * Redistribution and use in source and binary forms, with or without 6b0453382SBill Fenner * modification, are permitted provided that: (1) source code distributions 7b0453382SBill Fenner * retain the above copyright notice and this paragraph in its entirety, (2) 8b0453382SBill Fenner * distributions including binary code include the above copyright notice and 9b0453382SBill Fenner * this paragraph in its entirety in the documentation or other materials 10b0453382SBill Fenner * provided with the distribution, and (3) all advertising materials mentioning 11b0453382SBill Fenner * features or use of this software display the following acknowledgement: 12b0453382SBill Fenner * ``This product includes software developed by the University of California, 13b0453382SBill Fenner * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14b0453382SBill Fenner * the University nor the names of its contributors may be used to endorse 15b0453382SBill Fenner * or promote products derived from this software without specific prior 16b0453382SBill Fenner * written permission. 17b0453382SBill Fenner * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18b0453382SBill Fenner * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19b0453382SBill Fenner * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20b0453382SBill Fenner */ 21b0453382SBill Fenner 223340d773SGleb Smirnoff /* \summary: IPv6 fragmentation header printer */ 233340d773SGleb Smirnoff 24ee67461eSJoseph Mingrone #include <config.h> 25b0453382SBill Fenner 26ee67461eSJoseph Mingrone #include "netdissect-stdinc.h" 27b0453382SBill Fenner 283340d773SGleb Smirnoff #include "netdissect.h" 295b0fe478SBruce M Simpson #include "extract.h" 30b0453382SBill Fenner 310bff6a5aSEd Maste #include "ip6.h" 320bff6a5aSEd Maste 33b0453382SBill Fenner int 34ee67461eSJoseph Mingrone frag6_print(netdissect_options *ndo, const u_char *bp, const u_char *bp2) 35b0453382SBill Fenner { 36ee67461eSJoseph Mingrone const struct ip6_frag *dp; 37ee67461eSJoseph Mingrone const struct ip6_hdr *ip6; 38b0453382SBill Fenner 39ee67461eSJoseph Mingrone ndo->ndo_protocol = "frag6"; 40a90e161bSBill Fenner dp = (const struct ip6_frag *)bp; 41a90e161bSBill Fenner ip6 = (const struct ip6_hdr *)bp2; 42b0453382SBill Fenner 43*0a7e5f1fSJoseph Mingrone ND_PRINT("frag ("); 44*0a7e5f1fSJoseph Mingrone if (ndo->ndo_vflag) 45*0a7e5f1fSJoseph Mingrone ND_PRINT("0x%08x:", GET_BE_U_4(dp->ip6f_ident)); 46*0a7e5f1fSJoseph Mingrone ND_PRINT("%u|", GET_BE_U_2(dp->ip6f_offlg) & IP6F_OFF_MASK); 47*0a7e5f1fSJoseph Mingrone if ((bp - bp2) + sizeof(struct ip6_frag) > 48*0a7e5f1fSJoseph Mingrone sizeof(struct ip6_hdr) + GET_BE_U_2(ip6->ip6_plen)) 49*0a7e5f1fSJoseph Mingrone ND_PRINT("[length < 0] (invalid))"); 50*0a7e5f1fSJoseph Mingrone else 51*0a7e5f1fSJoseph Mingrone ND_PRINT("%zu)", 52ee67461eSJoseph Mingrone sizeof(struct ip6_hdr) + GET_BE_U_2(ip6->ip6_plen) - 53ee67461eSJoseph Mingrone (bp - bp2) - sizeof(struct ip6_frag)); 54b0453382SBill Fenner 55b0453382SBill Fenner /* it is meaningless to decode non-first fragment */ 56ee67461eSJoseph Mingrone if ((GET_BE_U_2(dp->ip6f_offlg) & IP6F_OFF_MASK) != 0) 575b0fe478SBruce M Simpson return -1; 58*0a7e5f1fSJoseph Mingrone else { 59ee67461eSJoseph Mingrone ND_PRINT(" "); 60b0453382SBill Fenner return sizeof(struct ip6_frag); 61b0453382SBill Fenner } 62b0453382SBill Fenner } 63