verify/warn icmpv6 checksum. from jinmei@kame

[tcpdump] / interface.h

diff --git a/interface.h b/interface.h
index 1254b7859223396612e313274a193cfddfec0f08..29b6f9b227d348b95fb8f3db02d16180615432db 100644 (file)
--- a/interface.h
+++ b/interface.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
+ * Copyright (c) 1988-2002

  *     The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  *     The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without


@@ -18,7 +18,7 @@
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *

- * @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.135 2000-09-18 05:11:43 guy Exp $ (LBL)
+ * @(#) $Header: /tcpdump/master/tcpdump/interface.h,v 1.209 2003-05-02 08:13:54 itojun Exp $ (LBL)

  */
 
 #ifndef tcpdump_interface_h
  */
 
 #ifndef tcpdump_interface_h


@@ -27,57 +27,45 @@
 #ifdef HAVE_OS_PROTO_H
 #include "os-proto.h"
 #endif
 #ifdef HAVE_OS_PROTO_H
 #include "os-proto.h"
 #endif

-#include <sys/types.h>
-#include <sys/time.h>

 
 #ifndef HAVE___ATTRIBUTE__
 #define __attribute__(x)
 #endif
 
 
 #ifndef HAVE___ATTRIBUTE__
 #define __attribute__(x)
 #endif
 

+#define _U_    __attribute__((unused))
+

 /* snprintf et al */
 
 #include <stdarg.h>
 
 #if !defined(HAVE_SNPRINTF)
 /* snprintf et al */
 
 #include <stdarg.h>
 
 #if !defined(HAVE_SNPRINTF)

-int snprintf (char *str, size_t sz, const char *format, ...)
-     __attribute__ ((format (printf, 3, 4)));
+int snprintf(char *, size_t, const char *, ...)
+     __attribute__((format(printf, 3, 4)));

 #endif
 
 #if !defined(HAVE_VSNPRINTF)
 #endif
 
 #if !defined(HAVE_VSNPRINTF)

-int vsnprintf (char *str, size_t sz, const char *format, va_list ap)
-     __attribute__((format (printf, 3, 0)));
+int vsnprintf(char *, size_t, const char *, va_list)
+     __attribute__((format(printf, 3, 0)));

 #endif
 
 #endif
 

-#if !defined(HAVE_ASPRINTF)
-int asprintf (char **ret, const char *format, ...)
-     __attribute__ ((format (printf, 2, 3)));
+#ifndef HAVE_STRLCAT
+extern size_t strlcat(char *, const char *, size_t);

 #endif
 #endif

-
-#if !defined(HAVE_VASPRINTF)
-int vasprintf (char **ret, const char *format, va_list ap)
-     __attribute__((format (printf, 2, 0)));
+#ifndef HAVE_STRLCPY
+extern size_t strlcpy(char *, const char *, size_t);

 #endif
 
 #endif
 

-#if !defined(HAVE_ASNPRINTF)
-int asnprintf (char **ret, size_t max_sz, const char *format, ...)
-     __attribute__ ((format (printf, 3, 4)));
+#ifndef HAVE_STRDUP
+extern char *strdup(const char *);

 #endif
 
 #endif
 

-#if !defined(HAVE_VASNPRINTF)
-int vasnprintf (char **ret, size_t max_sz, const char *format, va_list ap)
-     __attribute__((format (printf, 3, 0)));
-#endif
-
-#ifndef HAVE_STRLCAT
-extern size_t strlcat __P((char *, const char *, size_t));
-#endif
-#ifndef HAVE_STRLCPY
-extern size_t strlcpy __P((char *, const char *, size_t));
+#ifndef HAVE_STRSEP
+extern char *strsep(char **, const char *);

 #endif
 
 struct tok {
        int v;                  /* value */
 #endif
 
 struct tok {
        int v;                  /* value */

-       char *s;                /* string */
+       const char *s;          /* string */

 };
 
 extern int aflag;              /* translate network and broadcast addresses */
 };
 
 extern int aflag;              /* translate network and broadcast addresses */


@@ -95,7 +83,7 @@ extern int uflag;             /* Print undecoded NFS handles */
 extern int vflag;              /* verbose */
 extern int xflag;              /* print packet in hex */
 extern int Xflag;              /* print packet in hex/ascii */
 extern int vflag;              /* verbose */
 extern int xflag;              /* print packet in hex */
 extern int Xflag;              /* print packet in hex/ascii */

-
+extern int Aflag;              /* print packet only in ascii observing TAB, LF, CR and SPACE as graphical chars */

 extern char *espsecret;
 
 extern int packettype;         /* as specified by -T */
 extern char *espsecret;
 
 extern int packettype;         /* as specified by -T */


@@ -114,16 +102,14 @@ extern int packettype;            /* as specified by -T */
 #define max(a,b) ((b)>(a)?(b):(a))
 #endif
 
 #define max(a,b) ((b)>(a)?(b):(a))
 #endif
 

-#ifndef INET6

 /*
  * The default snapshot length.  This value allows most printers to print
  * useful information while keeping the amount of unwanted data down.
 /*
  * The default snapshot length.  This value allows most printers to print
  * useful information while keeping the amount of unwanted data down.

- * In particular, it allows for an ethernet header, tcp/ip header, and
- * 14 bytes of data (assuming no ip options).

  */
  */

-#define DEFAULT_SNAPLEN 68
+#ifndef INET6
+#define DEFAULT_SNAPLEN 68     /* ether + IPv4 + TCP + 14 */

 #else
 #else

-#define DEFAULT_SNAPLEN 96
+#define DEFAULT_SNAPLEN 96     /* ether + IPv6 + TCP + 22 */

 #endif
 
 #ifndef BIG_ENDIAN
 #endif
 
 #ifndef BIG_ENDIAN


@@ -131,30 +117,8 @@ extern int packettype;             /* as specified by -T */
 #define LITTLE_ENDIAN 1234
 #endif
 
 #define LITTLE_ENDIAN 1234
 #endif
 

-#ifdef ETHER_HEADER_HAS_EA
-#define ESRC(ep) ((ep)->ether_shost.ether_addr_octet)
-#define EDST(ep) ((ep)->ether_dhost.ether_addr_octet)
-#else

 #define ESRC(ep) ((ep)->ether_shost)
 #define EDST(ep) ((ep)->ether_dhost)
 #define ESRC(ep) ((ep)->ether_shost)
 #define EDST(ep) ((ep)->ether_dhost)

-#endif
-
-#ifdef ETHER_ARP_HAS_X
-#define SHA(ap) ((ap)->arp_xsha)
-#define THA(ap) ((ap)->arp_xtha)
-#define SPA(ap) ((ap)->arp_xspa)
-#define TPA(ap) ((ap)->arp_xtpa)
-#else
-#ifdef ETHER_ARP_HAS_EA
-#define SHA(ap) ((ap)->arp_sha.ether_addr_octet)
-#define THA(ap) ((ap)->arp_tha.ether_addr_octet)
-#else
-#define SHA(ap) ((ap)->arp_sha)
-#define THA(ap) ((ap)->arp_tha)
-#endif
-#define SPA(ap) ((ap)->arp_spa)
-#define TPA(ap) ((ap)->arp_tpa)
-#endif

 
 #ifndef NTOHL
 #define NTOHL(x)       (x) = ntohl(x)
 
 #ifndef NTOHL
 #define NTOHL(x)       (x) = ntohl(x)


@@ -169,12 +133,19 @@ extern char *program_name;        /* used to generate self-identifying messages */
 extern int32_t thiszone;       /* seconds offset from gmt to local time */
 
 extern int snaplen;
 extern int32_t thiszone;       /* seconds offset from gmt to local time */
 
 extern int snaplen;

-/* global pointers to beginning and end of current packet (during printing) */
-extern const u_char *packetp;
+/* global pointer to end of current packet (during printing) */

 extern const u_char *snapend;
 
 extern const u_char *snapend;
 

-/* True if  "l" bytes of "var" were captured */
-#define TTEST2(var, l) ((u_char *)&(var) <= snapend - (l))
+/*
+ * True if  "l" bytes of "var" were captured.
+ *
+ * The "snapend - (l) <= snapend" checks to make sure "l" isn't so large
+ * that "snapend - (l)" underflows.
+ *
+ * The check is for <= rather than < because "l" might be 0.
+ */
+#define TTEST2(var, l) (snapend - (l) <= snapend && \
+                       (const u_char *)&(var) <= snapend - (l))

 
 /* True if "var" was captured */
 #define TTEST(var) TTEST2(var, sizeof(var))
 
 /* True if "var" was captured */
 #define TTEST(var) TTEST2(var, sizeof(var))


@@ -185,17 +156,18 @@ extern const u_char *snapend;
 /* Bail if "var" was not captured */
 #define TCHECK(var) TCHECK2(var, sizeof(var))
 
 /* Bail if "var" was not captured */
 #define TCHECK(var) TCHECK2(var, sizeof(var))
 

-struct timeval;
-

 extern void ts_print(const struct timeval *);
 extern void relts_print(int);
 
 extern int fn_print(const u_char *, const u_char *);
 extern int fn_printn(const u_char *, u_int, const u_char *);
 extern const char *tok2str(const struct tok *, const char *, int);
 extern void ts_print(const struct timeval *);
 extern void relts_print(int);
 
 extern int fn_print(const u_char *, const u_char *);
 extern int fn_printn(const u_char *, u_int, const u_char *);
 extern const char *tok2str(const struct tok *, const char *, int);

-extern char *dnaddr_string(u_short);
+extern int mask2plen(u_int32_t);
+extern char *bittok2str(const struct tok *, const char *, int);
+extern const char *tok2strary_internal(const char **, int, const char *, int);
+#define        tok2strary(a,f,i) tok2strary_internal(a, sizeof(a)/sizeof(a[0]),f,i)

 
 

-extern void wrapup(int);
+extern const char *dnaddr_string(u_short);

 
 extern void error(const char *, ...)
     __attribute__((noreturn, format (printf, 1, 2)));
 
 extern void error(const char *, ...)
     __attribute__((noreturn, format (printf, 1, 2)));


@@ -207,111 +179,150 @@ extern char *copy_argv(char **);
 extern void safeputchar(int);
 extern void safeputs(const char *);
 
 extern void safeputchar(int);
 extern void safeputs(const char *);
 

-extern char *isonsap_string(const u_char *);
-extern char *llcsap_string(u_char);
-extern char *protoid_string(const u_char *);
-extern char *dnname_string(u_short);
-extern char *dnnum_string(u_short);
+extern const char *isonsap_string(const u_char *);
+extern const char *llcsap_string(u_char);
+extern const char *protoid_string(const u_char *);
+extern const char *ipxsap_string(u_short);
+extern const char *dnname_string(u_short);
+extern const char *dnnum_string(u_short);

 
 /* The printer routines. */
 
 
 /* The printer routines. */
 

-struct pcap_pkthdr;
+#include <pcap.h>

 
 

-extern void ascii_print_with_offset(const u_char *, u_int, u_int);    
-extern void ascii_print(const u_char *, u_int);    
-extern void hex_print_with_offset(const u_char *, u_int, u_int);    
-extern void telnet_print(const u_char *, u_int);    
-extern void hex_print(const u_char *, u_int);    
-extern int ether_encap_print(u_short, const u_char *, u_int, u_int);
+extern int print_unknown_data(const u_char *, const char *,int);
+extern void ascii_print_with_offset(const u_char *, u_int, u_int);
+extern void ascii_print(const u_char *, u_int);
+extern void hex_print_with_offset(const u_char *, u_int, u_int);
+extern void telnet_print(const u_char *, u_int);
+extern void hex_print(const u_char *, u_int);
+extern int ether_encap_print(u_short, const u_char *, u_int, u_int, u_short *);

 extern int llc_print(const u_char *, u_int, u_int, const u_char *,
 extern int llc_print(const u_char *, u_int, u_int, const u_char *,

-       const u_char *);
+       const u_char *, u_short *);
+extern int snap_print(const u_char *, u_int, u_int, u_short *, u_int32_t,
+       u_short, u_int);

 extern void aarp_print(const u_char *, u_int);
 extern void arp_print(const u_char *, u_int, u_int);
 extern void atalk_print(const u_char *, u_int);
 extern void aarp_print(const u_char *, u_int);
 extern void arp_print(const u_char *, u_int, u_int);
 extern void atalk_print(const u_char *, u_int);

-extern void atm_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);
-extern void bootp_print(const u_char *, u_int, u_short, u_short);
+extern void atm_print(u_int, u_int, u_int, const u_char *, u_int, u_int);
+extern u_int atm_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sunatm_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void bootp_print(const u_char *, u_int);

 extern void bgp_print(const u_char *, int);
 extern void bgp_print(const u_char *, int);

-extern void cnfp_print(const u_char *cp, u_int len, const u_char *bp);
+extern void beep_print(const u_char *, u_int);
+extern void cnfp_print(const u_char *, const u_char *);

 extern void decnet_print(const u_char *, u_int, u_int);
 extern void default_print(const u_char *, u_int);
 extern void default_print_unaligned(const u_char *, u_int);
 extern void dvmrp_print(const u_char *, u_int);
 extern void decnet_print(const u_char *, u_int, u_int);
 extern void default_print(const u_char *, u_int);
 extern void default_print_unaligned(const u_char *, u_int);
 extern void dvmrp_print(const u_char *, u_int);

-extern void egp_print(const u_char *, u_int, const u_char *);
-extern void ether_if_print(u_char *, const struct pcap_pkthdr *,
+extern void egp_print(const u_char *);
+extern u_int enc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int pflog_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int arcnet_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int arcnet_linux_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void ether_print(const u_char *, u_int, u_int);
+extern u_int ether_if_print(const struct pcap_pkthdr *,

        const u_char *);
        const u_char *);

-extern void token_if_print(u_char *, const struct pcap_pkthdr *,
+extern u_int token_print(const u_char *, u_int, u_int);
+extern u_int token_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void fddi_print(const u_char *, u_int, u_int);
+extern u_int fddi_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int fr_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ieee802_11_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ieee802_11_radio_if_print(const struct pcap_pkthdr *,

        const u_char *);
        const u_char *);

-extern void fddi_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);

 extern void gre_print(const u_char *, u_int);
 extern void icmp_print(const u_char *, u_int, const u_char *);
 extern void gre_print(const u_char *, u_int);
 extern void icmp_print(const u_char *, u_int, const u_char *);

+extern void igmp_print(const u_char *, u_int);

 extern void igrp_print(const u_char *, u_int, const u_char *);
 extern void ip_print(const u_char *, u_int);
 extern void ipN_print(const u_char *, u_int);
 extern void igrp_print(const u_char *, u_int, const u_char *);
 extern void ip_print(const u_char *, u_int);
 extern void ipN_print(const u_char *, u_int);

+extern u_int ipfc_if_print(const struct pcap_pkthdr *, const u_char *);

 extern void ipx_print(const u_char *, u_int);
 extern void isoclns_print(const u_char *, u_int, u_int, const u_char *,
        const u_char *);
 extern void ipx_print(const u_char *, u_int);
 extern void isoclns_print(const u_char *, u_int, u_int, const u_char *,
        const u_char *);

-extern void krb_print(const u_char *, u_int);
+extern void krb_print(const u_char *);
+extern u_int llap_print(const u_char *, u_int);
+extern u_int ltalk_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void msdp_print(const unsigned char *, u_int);

 extern void nfsreply_print(const u_char *, u_int, const u_char *);
 extern void nfsreq_print(const u_char *, u_int, const u_char *);
 extern void ns_print(const u_char *, u_int);
 extern void ntp_print(const u_char *, u_int);
 extern void nfsreply_print(const u_char *, u_int, const u_char *);
 extern void nfsreq_print(const u_char *, u_int, const u_char *);
 extern void ns_print(const u_char *, u_int);
 extern void ntp_print(const u_char *, u_int);

-extern void null_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);
+extern u_int null_if_print(const struct pcap_pkthdr *, const u_char *);

 extern void ospf_print(const u_char *, u_int, const u_char *);
 extern void pimv1_print(const u_char *, u_int);
 extern void cisco_autorp_print(const u_char *, u_int);
 extern void ospf_print(const u_char *, u_int, const u_char *);
 extern void pimv1_print(const u_char *, u_int);
 extern void cisco_autorp_print(const u_char *, u_int);

+extern void rsvp_print(const u_char *, u_int);
+extern void ldp_print(const u_char *, u_int);

 extern void mobile_print(const u_char *, u_int);
 extern void pim_print(const u_char *, u_int);
 extern void mobile_print(const u_char *, u_int);
 extern void pim_print(const u_char *, u_int);

-extern void pppoe_print(const u_char *, u_int);
-extern void ppp_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);
-extern void ppp_hdlc_if_print(u_char *, const struct pcap_pkthdr *,
-       const u_char *);
-extern void ppp_bsdos_if_print(u_char *, const struct pcap_pkthdr *,
-       const u_char *);
-extern int vjc_print(register const char *, register u_int, u_short);
-extern void raw_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);
+extern u_int pppoe_print(const u_char *, u_int);
+extern u_int ppp_print(register const u_char *, u_int);
+extern u_int ppp_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ppp_hdlc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int ppp_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int pppoe_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int prism_if_print(const struct pcap_pkthdr *, const u_char *);
+extern int vjc_print(register const char *, u_short);
+extern u_int raw_if_print(const struct pcap_pkthdr *, const u_char *);

 extern void rip_print(const u_char *, u_int);
 extern void rip_print(const u_char *, u_int);

-extern void sl_if_print(u_char *, const struct pcap_pkthdr *, const u_char *);
-extern void lane_if_print(u_char *, const struct pcap_pkthdr *,const u_char *);
-extern void cip_if_print(u_char *, const struct pcap_pkthdr *,const u_char *);
-extern void sl_bsdos_if_print(u_char *, const struct pcap_pkthdr *,
-    const u_char *);
-extern void chdlc_if_print(u_char *, const struct pcap_pkthdr *,
-    const u_char *);
+extern u_int sl_if_print(const struct pcap_pkthdr *, const u_char *);
+extern void lane_print(const u_char *, u_int, u_int);
+extern u_int lane_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int cip_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sl_bsdos_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int chdlc_if_print(const struct pcap_pkthdr *, const u_char *);
+extern u_int sll_if_print(const struct pcap_pkthdr *, const u_char *);

 extern void snmp_print(const u_char *, u_int);
 extern void sunrpcrequest_print(const u_char *, u_int, const u_char *);
 extern void snmp_print(const u_char *, u_int);
 extern void sunrpcrequest_print(const u_char *, u_int, const u_char *);

-extern void tcp_print(const u_char *, u_int, const u_char *);
+extern void tcp_print(const u_char *, u_int, const u_char *, int);

 extern void tftp_print(const u_char *, u_int);
 extern void tftp_print(const u_char *, u_int);

-extern void udp_print(const u_char *, u_int, const u_char *);
+extern void timed_print(const u_char *);
+extern void udp_print(const u_char *, u_int, const u_char *, int);

 extern void wb_print(const void *, u_int);
 extern void wb_print(const void *, u_int);

-extern int ah_print(register const u_char *, register const u_char *);
-extern int esp_print(register const u_char *, register const u_char *, int *);
+extern int ah_print(register const u_char *);
+extern int esp_print(register const u_char *, register const u_char *, int *, int *);

 extern void isakmp_print(const u_char *, u_int, const u_char *);
 extern void isakmp_print(const u_char *, u_int, const u_char *);

-extern int ipcomp_print(register const u_char *, register const u_char *, int *);
+extern int ipcomp_print(register const u_char *, int *);

 extern void rx_print(register const u_char *, int, int, int, u_char *);
 extern void rx_print(register const u_char *, int, int, int, u_char *);

-extern void netbeui_print(const u_char *, const u_char *);
-extern void ipx_netbios_print(const u_char *, const u_char *);
+extern void netbeui_print(u_short, const u_char *, int);
+extern void ipx_netbios_print(const u_char *, u_int);

 extern void nbt_tcp_print(const u_char *, int);
 extern void nbt_tcp_print(const u_char *, int);

-extern void nbt_udp137_print(const u_char *data, int);
-extern void nbt_udp138_print(const u_char *data, int);
+extern void nbt_udp137_print(const u_char *, int);
+extern void nbt_udp138_print(const u_char *, int);

 extern char *smb_errstr(int, int);
 extern void print_data(const unsigned char *, int);
 extern void l2tp_print(const u_char *, u_int);
 extern char *smb_errstr(int, int);
 extern void print_data(const unsigned char *, int);
 extern void l2tp_print(const u_char *, u_int);

-extern void lcp_print(const u_char *, u_int);
-extern void vrrp_print(const u_char *bp, u_int len, int ttl);
-extern void cdp_print(const u_char *p, u_int length, u_int caplen,
-                     const u_char *esrc, const u_char *edst);
-extern void stp_print(const u_char *p, u_int length);
+extern void vrrp_print(const u_char *, u_int, int);
+extern void cdp_print(const u_char *, u_int, u_int);
+extern void stp_print(const u_char *, u_int);
+extern void radius_print(const u_char *, u_int);
+extern void lwres_print(const u_char *, u_int);
+extern void pptp_print(const u_char *);
+extern void sctp_print(const u_char *, const u_char *, u_int);
+extern void mpls_print(const u_char *, u_int);
+extern void zephyr_print(const u_char *, int);
+extern void hsrp_print(const u_char *, u_int);

 
 #ifdef INET6
 
 #ifdef INET6

-extern void ip6_print(const u_char *, int);
+extern void ip6_print(const u_char *, u_int);

 extern void ip6_opt_print(const u_char *, int);
 extern int hbhopt_print(const u_char *);
 extern int dstopt_print(const u_char *);
 extern int frag6_print(const u_char *, const u_char *);
 extern void ip6_opt_print(const u_char *, int);
 extern int hbhopt_print(const u_char *);
 extern int dstopt_print(const u_char *);
 extern int frag6_print(const u_char *, const u_char *);

-extern void icmp6_print(const u_char *, const u_char *);
-extern void ripng_print(const u_char *, int);
+extern int mobility_print(const u_char *, const u_char *);
+extern void icmp6_print(const u_char *, const u_char *, int);
+extern void ripng_print(const u_char *, unsigned int);

 extern int rt6_print(const u_char *, const u_char *);
 extern void ospf6_print(const u_char *, u_int);
 extern void dhcp6_print(const u_char *, u_int, u_int16_t, u_int16_t);
 #endif /*INET6*/
 extern int rt6_print(const u_char *, const u_char *);
 extern void ospf6_print(const u_char *, u_int);
 extern void dhcp6_print(const u_char *, u_int, u_int16_t, u_int16_t);
 #endif /*INET6*/

-extern u_short in_cksum(const u_short *addr, register int len, u_short csum);
+extern u_short in_cksum(const u_short *, register u_int, int);
+extern u_int16_t in_cksum_shouldbe(u_int16_t, u_int16_t);
+
+#ifndef HAVE_BPF_DUMP
+struct bpf_program;
+
+extern void bpf_dump(struct bpf_program *, int);
+#endif