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[] = 24 "@(#) $Header: /tcpdump/master/tcpdump/print-frag6.c,v 1.13 2001/09/17 21:58:02 fenner Exp $"; 25 #endif 26 27 #ifdef HAVE_CONFIG_H 28 #include "config.h" 29 #endif 30 31 #ifdef INET6 32 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 38 39 #include <netinet/in.h> 40 41 #include <stdio.h> 42 43 #include "ip6.h" 44 45 #include "interface.h" 46 #include "addrtoname.h" 47 48 int 49 frag6_print(register const u_char *bp, register const u_char *bp2) 50 { 51 register const struct ip6_frag *dp; 52 register const struct ip6_hdr *ip6; 53 register const u_char *ep; 54 55 dp = (const struct ip6_frag *)bp; 56 ip6 = (const struct ip6_hdr *)bp2; 57 58 /* 'ep' points to the end of available data. */ 59 ep = snapend; 60 61 TCHECK(dp->ip6f_offlg); 62 63 if (vflag) { 64 printf("frag (0x%08x:%d|%ld)", 65 (u_int32_t)ntohl(dp->ip6f_ident), 66 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 67 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 68 (long)(bp - bp2) - sizeof(struct ip6_frag)); 69 } else { 70 printf("frag (%d|%ld)", 71 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 72 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 73 (long)(bp - bp2) - sizeof(struct ip6_frag)); 74 } 75 76 #if 1 77 /* it is meaningless to decode non-first fragment */ 78 if (ntohs(dp->ip6f_offlg & IP6F_OFF_MASK) != 0) 79 return 65535; 80 else 81 #endif 82 { 83 fputs(" ", stdout); 84 return sizeof(struct ip6_frag); 85 } 86 trunc: 87 fputs("[|frag]", stdout); 88 return 65535; 89 #undef TCHECK 90 } 91 #endif /* INET6 */ 92