1 /* $OpenBSD: print-frag6.c,v 1.3 2006/05/27 21:52:38 moritz Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 */ 23 24 #ifndef lint 25 static const char rcsid[] = 26 "@(#) /master/usr.sbin/tcpdump/tcpdump/print-icmp.c,v 2.1 1995/02/03 18:14:42 polk Exp (LBL)"; 27 #endif 28 29 #ifdef INET6 30 31 #include <sys/param.h> 32 #include <sys/time.h> 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 36 #include <net/if.h> 37 38 #include <netinet/in.h> 39 #include <netinet/if_ether.h> 40 #include <netinet/in_systm.h> 41 #include <netinet/ip.h> 42 #include <netinet/ip_icmp.h> 43 #include <netinet/ip_var.h> 44 #include <netinet/udp.h> 45 #include <netinet/udp_var.h> 46 #include <netinet/tcp.h> 47 48 #include <stdio.h> 49 50 #include <netinet/ip6.h> 51 52 #include "interface.h" 53 #include "addrtoname.h" 54 55 int 56 frag6_print(register const u_char *bp, register const u_char *bp2) 57 { 58 register const struct ip6_frag *dp; 59 register const struct ip6_hdr *ip6; 60 register const u_char *ep; 61 62 #if 0 63 #define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc 64 #endif 65 66 dp = (struct ip6_frag *)bp; 67 ip6 = (struct ip6_hdr *)bp2; 68 69 /* 'ep' points to the end of avaible data. */ 70 ep = snapend; 71 72 TCHECK(dp->ip6f_offlg); 73 74 if (vflag) { 75 TCHECK(dp->ip6f_ident); 76 printf("frag (0x%08x:%d|%ld)", 77 ntohl(dp->ip6f_ident), 78 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 79 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 80 (long)(bp - bp2) - sizeof(struct ip6_frag)); 81 } else { 82 printf("frag (%d|%ld)", 83 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 84 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 85 (long)(bp - bp2) - sizeof(struct ip6_frag)); 86 } 87 88 /* it is meaningless to decode non-first fragment */ 89 if (ntohs(dp->ip6f_offlg & IP6F_OFF_MASK) != 0) 90 return 65535; 91 else 92 { 93 fputs(" ", stdout); 94 return sizeof(struct ip6_frag); 95 } 96 trunc: 97 fputs("[|frag]", stdout); 98 return 65535; 99 #undef TCHECK 100 } 101 #endif /* INET6 */ 102