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 1.3.2.1 2000/01/11 06:58:24 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 #include <net/if.h> 39 40 #include <netinet/in.h> 41 #include <netinet/if_ether.h> 42 #include <netinet/in_systm.h> 43 #include <netinet/ip.h> 44 #include <netinet/ip_icmp.h> 45 #include <netinet/ip_var.h> 46 #include <netinet/udp.h> 47 #include <netinet/udp_var.h> 48 #include <netinet/tcp.h> 49 50 #include <stdio.h> 51 52 #include <netinet/ip6.h> 53 54 #include "interface.h" 55 #include "addrtoname.h" 56 57 int 58 frag6_print(register const u_char *bp, register const u_char *bp2) 59 { 60 register const struct ip6_frag *dp; 61 register const struct ip6_hdr *ip6; 62 register const u_char *ep; 63 64 #if 0 65 #define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc 66 #endif 67 68 dp = (struct ip6_frag *)bp; 69 ip6 = (struct ip6_hdr *)bp2; 70 71 /* 'ep' points to the end of avaible data. */ 72 ep = snapend; 73 74 TCHECK(dp->ip6f_offlg); 75 76 if (vflag) { 77 printf("frag (0x%08x:%d|%ld)", 78 (u_int32_t)ntohl(dp->ip6f_ident), 79 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 80 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 81 (long)(bp - bp2) - sizeof(struct ip6_frag)); 82 } else { 83 printf("frag (%d|%ld)", 84 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK), 85 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) - 86 (long)(bp - bp2) - sizeof(struct ip6_frag)); 87 } 88 89 #if 0 90 /* it is meaningless to decode non-first fragment */ 91 if (ntohs(dp->ip6f_offlg & IP6F_OFF_MASK) != 0) 92 return 65535; 93 else 94 #endif 95 { 96 fputs(" ", stdout); 97 return sizeof(struct ip6_frag); 98 } 99 trunc: 100 fputs("[|frag]", stdout); 101 return 65535; 102 #undef TCHECK 103 } 104 #endif /* INET6 */ 105