1 /* $OpenBSD: print-frag6.c,v 1.11 2022/01/05 05:35:19 dlg 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 #include <sys/time.h>
25 #include <sys/types.h>
26 #include <sys/socket.h>
27
28 #include <net/if.h>
29
30 #include <netinet/in.h>
31 #include <netinet/if_ether.h>
32 #include <netinet/ip.h>
33 #include <netinet/ip_icmp.h>
34 #include <netinet/ip_var.h>
35 #include <netinet/udp.h>
36 #include <netinet/udp_var.h>
37 #include <netinet/tcp.h>
38
39 #include <stdio.h>
40
41 #include <netinet/ip6.h>
42
43 #include "interface.h"
44 #include "addrtoname.h"
45
46 int
frag6_print(const u_char * bp,const u_char * bp2)47 frag6_print(const u_char *bp, const u_char *bp2)
48 {
49 const struct ip6_frag *dp;
50 const struct ip6_hdr *ip6;
51
52 dp = (struct ip6_frag *)bp;
53 ip6 = (struct ip6_hdr *)bp2;
54
55 TCHECK(dp->ip6f_ident);
56
57 printf("frag (0x%08x:%ld@%d%s)",
58 ntohl(dp->ip6f_ident),
59 sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen) -
60 (long)(bp - bp2) - sizeof(struct ip6_frag),
61 ntohs(dp->ip6f_offlg & IP6F_OFF_MASK),
62 (dp->ip6f_offlg & IP6F_MORE_FRAG) ? "+" : "");
63
64 /* it is meaningless to decode non-first fragment */
65 if (ntohs(dp->ip6f_offlg & IP6F_OFF_MASK) != 0)
66 return 65535;
67 else
68 {
69 printf(" ");
70 return sizeof(struct ip6_frag);
71 }
72 trunc:
73 printf("[|frag]");
74 return 65535;
75 }
76