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tcpdump/netdissect.h
Francois-Xavier Le Bail 176e182416 Apply the first step of the new way to fetch data with bounds checking 
Add GET_{BE|HE|LE}_, GET_U_1, GET_S_1, GET_IPV4_TO_HOST_ORDER,
GET_IPV4_TO_NETWORK_ORDER macros and
get_{be|he|le}_, get_u_1, get_s_1, get_ipv4_to_host_order,
get_ipv4_to_network_order inline functions,
with setjmp/longjmp logic to do better and easier data fetch with
bounds checking.

Based on Guy Harris's idea and code.
2019-03-26 21:06:06 +01:00

711 lines
33 KiB
C
Raw Blame History

/*
* Copyright (c) 1988-1997
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 1998-2012 Michael Richardson <mcr@tcpdump.org>
* The TCPDUMP project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef netdissect_h
#define netdissect_h
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
#include <sys/types.h>
#include <setjmp.h>
#include "status-exit-codes.h"
/*
* Data types corresponding to multi-byte integral values within data
* structures. These are defined as arrays of octets, so that they're
* not aligned on their "natural" boundaries, and so that you *must*
* use the EXTRACT_ macros to extract them (which you should be doing
* *anyway*, so as not to assume a particular byte order or alignment
* in your code).
*
* We even want EXTRACT_U_1 used for 8-bit integral values, so we
* define nd_uint8_t and nd_int8_t as arrays as well.
*/
typedef unsigned char nd_uint8_t[1];
typedef unsigned char nd_uint16_t[2];
typedef unsigned char nd_uint24_t[3];
typedef unsigned char nd_uint32_t[4];
typedef unsigned char nd_uint40_t[5];
typedef unsigned char nd_uint48_t[6];
typedef unsigned char nd_uint56_t[7];
typedef unsigned char nd_uint64_t[8];
typedef signed char nd_int8_t[1];
/*
* "unsigned char" so that sign extension isn't done on the
* individual bytes while they're being assembled.
*/
typedef unsigned char nd_int32_t[4];
typedef unsigned char nd_int64_t[8];
/*
* Use this for IPv4 addresses and netmasks.
*
* It's defined as an array of octets, so that it's not guaranteed to
* be aligned on its "natural" boundary (in some packet formats, it
* *isn't* so aligned). We have separate EXTRACT_ calls for them;
* sometimes you want the host-byte-order value, other times you want
* the network-byte-order value.
*
* Don't use EXTRACT_BE_U_4() on them, use EXTRACT_IPV4_TO_HOST_ORDER()
* if you want them in host byte order and EXTRACT_IPV4_TO_NETWORK_ORDER()
* if you want them in network byte order (which you want with system APIs
* that expect network-order IPv4 addresses, such as inet_ntop()).
*
* If, on your little-endian machine (e.g., an "IBM-compatible PC", no matter
* what the OS, or an Intel Mac, no matter what the OS), you get the wrong
* answer, and you've used EXTRACT_BE_U_4(), do *N*O*T* "fix" this by using
* EXTRACT_LE_U_4(), fix it by using EXTRACT_IPV4_TO_NETWORK_ORDER(),
* otherwise you're breaking the result on big-endian machines (e.g.,
* most PowerPC/Power ISA machines, System/390 and z/Architecture, SPARC,
* etc.).
*
* Yes, people do this; that's why Wireshark has tvb_get_ipv4(), to extract
* an IPv4 address from a packet data buffer; it was introduced in reaction
* to somebody who *had* done that.
*/
typedef unsigned char nd_ipv4[4];
/*
* Use this for IPv6 addresses and netmasks.
*/
typedef unsigned char nd_ipv6[16];
/*
* Use this for MAC addresses.
*/
#define MAC_ADDR_LEN 6 /* length of MAC addresses */
typedef unsigned char nd_mac_addr[MAC_ADDR_LEN];
/*
* Use this for blobs of bytes; make them arrays of nd_byte.
*/
typedef unsigned char nd_byte;
/*
* Round up x to a multiple of y; y must be a power of 2.
*/
#ifndef roundup2
#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1)))
#endif
/* nd_snprintf et al */
#include <stdarg.h>
#include <pcap.h>
#include "ip.h" /* struct ip for nextproto4_cksum() */
#include "ip6.h" /* struct ip6 for nextproto6_cksum() */
#ifndef HAVE_STRLCAT
extern size_t strlcat (char *, const char *, size_t);
#endif
#ifndef HAVE_STRLCPY
extern size_t strlcpy (char *, const char *, size_t);
#endif
#ifndef HAVE_STRDUP
extern char *strdup (const char *str);
#endif
#ifndef HAVE_STRSEP
extern char *strsep(char **, const char *);
#endif
struct tok {
u_int v; /* value */
const char *s; /* string */
};
extern const char *tok2strbuf(const struct tok *, const char *, u_int,
char *buf, size_t bufsize);
/* tok2str is deprecated */
extern const char *tok2str(const struct tok *, const char *, u_int);
extern char *bittok2str(const struct tok *, const char *, u_int);
extern char *bittok2str_nosep(const struct tok *, const char *, u_int);
/* Initialize netdissect. */
extern int nd_init(char *, size_t);
/* Clean up netdissect. */
extern void nd_cleanup(void);
/* Do we have libsmi support? */
extern int nd_have_smi_support(void);
/* Load an SMI module. */
extern int nd_load_smi_module(const char *, char *, size_t);
/* Flag indicating whether an SMI module has been loaded. */
extern int nd_smi_module_loaded;
/* Version number of the SMI library, or NULL if we don't have libsmi support. */
extern const char *nd_smi_version_string(void);
typedef struct netdissect_options netdissect_options;
#define IF_PRINTER_ARGS (netdissect_options *, const struct pcap_pkthdr *, const u_char *)
typedef u_int (*if_printer) IF_PRINTER_ARGS;
struct netdissect_options {
int ndo_bflag; /* print 4 byte ASes in ASDOT notation */
int ndo_eflag; /* print ethernet header */
int ndo_fflag; /* don't translate "foreign" IP address */
int ndo_Kflag; /* don't check IP, TCP or UDP checksums */
int ndo_nflag; /* leave addresses as numbers */
int ndo_Nflag; /* remove domains from printed host names */
int ndo_qflag; /* quick (shorter) output */
int ndo_Sflag; /* print raw TCP sequence numbers */
int ndo_tflag; /* print packet arrival time */
int ndo_uflag; /* Print undecoded NFS handles */
int ndo_vflag; /* verbosity level */
int ndo_xflag; /* print packet in hex */
int ndo_Xflag; /* print packet in hex/ASCII */
int ndo_Aflag; /* print packet only in ASCII observing TAB,
* LF, CR and SPACE as graphical chars
*/
int ndo_Hflag; /* dissect 802.11s draft mesh standard */
const char *ndo_protocol; /* protocol */
jmp_buf ndo_truncated; /* jmp_buf for setjmp()/longjmp() */
void *ndo_last_mem_p; /* pointer to the last allocated memory chunk */
int ndo_packet_number; /* print a packet number in the beginning of line */
int ndo_suppress_default_print; /* don't use default_print() for unknown packet types */
int ndo_tstamp_precision; /* requested time stamp precision */
const char *program_name; /* Name of the program using the library */
char *ndo_espsecret;
struct sa_list *ndo_sa_list_head; /* used by print-esp.c */
struct sa_list *ndo_sa_default;
char *ndo_sigsecret; /* Signature verification secret key */
int ndo_packettype; /* as specified by -T */
int ndo_snaplen;
/*global pointers to beginning and end of current packet (during printing) */
const u_char *ndo_packetp;
const u_char *ndo_snapend;
/* pointer to the if_printer function */
if_printer ndo_if_printer;
/* pointer to void function to output stuff */
void (*ndo_default_print)(netdissect_options *,
const u_char *bp, u_int length);
/* pointer to function to do regular output */
int (*ndo_printf)(netdissect_options *,
const char *fmt, ...)
PRINTFLIKE_FUNCPTR(2, 3);
/* pointer to function to output errors */
void NORETURN_FUNCPTR (*ndo_error)(netdissect_options *,
status_exit_codes_t status,
const char *fmt, ...)
PRINTFLIKE_FUNCPTR(3, 4);
/* pointer to function to output warnings */
void (*ndo_warning)(netdissect_options *,
const char *fmt, ...)
PRINTFLIKE_FUNCPTR(2, 3);
};
#define PT_VAT 1 /* Visual Audio Tool */
#define PT_WB 2 /* distributed White Board */
#define PT_RPC 3 /* Remote Procedure Call */
#define PT_RTP 4 /* Real-Time Applications protocol */
#define PT_RTCP 5 /* Real-Time Applications control protocol */
#define PT_SNMP 6 /* Simple Network Management Protocol */
#define PT_CNFP 7 /* Cisco NetFlow protocol */
#define PT_TFTP 8 /* trivial file transfer protocol */
#define PT_AODV 9 /* Ad-hoc On-demand Distance Vector Protocol */
#define PT_CARP 10 /* Common Address Redundancy Protocol */
#define PT_RADIUS 11 /* RADIUS authentication Protocol */
#define PT_ZMTP1 12 /* ZeroMQ Message Transport Protocol 1.0 */
#define PT_VXLAN 13 /* Virtual eXtensible Local Area Network */
#define PT_PGM 14 /* [UDP-encapsulated] Pragmatic General Multicast */
#define PT_PGM_ZMTP1 15 /* ZMTP/1.0 inside PGM (native or UDP-encapsulated) */
#define PT_LMP 16 /* Link Management Protocol */
#define PT_RESP 17 /* RESP */
#ifndef min
#define min(a,b) ((a)>(b)?(b):(a))
#endif
#ifndef max
#define max(a,b) ((b)>(a)?(b):(a))
#endif
/* For source or destination ports tests (UDP, TCP, ...) */
#define IS_SRC_OR_DST_PORT(p) (sport == (p) || dport == (p))
/*
* Maximum snapshot length. This should be enough to capture the full
* packet on most network interfaces.
*
*
* Somewhat arbitrary, but chosen to be:
*
* 1) big enough for maximum-size Linux loopback packets (65549)
* and some USB packets captured with USBPcap:
*
* http://desowin.org/usbpcap/
*
* (> 131072, < 262144)
*
* and
*
* 2) small enough not to cause attempts to allocate huge amounts of
* memory; some applications might use the snapshot length in a
* savefile header to control the size of the buffer they allocate,
* so a size of, say, 2^31-1 might not work well.
*
* XXX - does it need to be bigger still? Note that, for versions of
* libpcap with pcap_create()/pcap_activate(), if no -s flag is specified
* or -s 0 is specified, we won't set the snapshot length at all, and will
* let libpcap choose a snapshot length; newer versions may choose a bigger
* value than 262144 for D-Bus, for example.
*/
#define MAXIMUM_SNAPLEN 262144
/*
* True if "l" bytes from "p" were captured.
*
* The "ndo->ndo_snapend - (l) <= ndo->ndo_snapend" checks to make sure
* "l" isn't so large that "ndo->ndo_snapend - (l)" underflows.
*
* The check is for <= rather than < because "l" might be 0.
*
* We cast the pointers to uintptr_t to make sure that the compiler
* doesn't optimize away any of these tests (which it is allowed to
* do, as adding an integer to, or subtracting an integer from, a
* pointer assumes that the pointer is a pointer to an element of an
* array and that the result of the addition or subtraction yields a
* pointer to another member of the array, so that, for example, if
* you subtract a positive integer from a pointer, the result is
* guaranteed to be less than the original pointer value). See
*
* http://www.kb.cert.org/vuls/id/162289
*/
/*
* Test in two parts to avoid these warnings:
* comparison of unsigned expression >= 0 is always true [-Wtype-limits],
* comparison is always true due to limited range of data type [-Wtype-limits].
*/
#define IS_NOT_NEGATIVE(x) (((x) > 0) || ((x) == 0))
#define ND_TTEST_LEN(p, l) \
(IS_NOT_NEGATIVE(l) && \
((uintptr_t)ndo->ndo_snapend - (l) <= (uintptr_t)ndo->ndo_snapend && \
(uintptr_t)(p) <= (uintptr_t)ndo->ndo_snapend - (l)))
/* True if "*(p)" was captured */
#define ND_TTEST_SIZE(p) ND_TTEST_LEN(p, sizeof(*(p)))
/* Bail out if "l" bytes from "p" were not captured */
#define ND_TCHECK_LEN(p, l) if (!ND_TTEST_LEN(p, l)) goto trunc
/* Bail out if "*(p)" was not captured */
#define ND_TCHECK_SIZE(p) ND_TCHECK_LEN(p, sizeof(*(p)))
#define ND_PRINT(...) (ndo->ndo_printf)(ndo, __VA_ARGS__)
#define ND_DEFAULTPRINT(ap, length) (*ndo->ndo_default_print)(ndo, ap, length)
extern void ts_print(netdissect_options *, const struct timeval *);
extern void signed_relts_print(netdissect_options *, int32_t);
extern void unsigned_relts_print(netdissect_options *, uint32_t);
extern void fn_print_char(netdissect_options *, u_char);
extern void fn_print_str(netdissect_options *, const u_char *);
extern int nd_print(netdissect_options *, const u_char *, const u_char *);
extern u_int nd_printztn(netdissect_options *ndo, const u_char *, u_int, const u_char *);
extern int nd_printn(netdissect_options *, const u_char *, u_int, const u_char *);
extern int nd_printzp(netdissect_options *, const u_char *, u_int, const u_char *);
/*
* Flags for txtproto_print().
*/
#define RESP_CODE_SECOND_TOKEN 0x00000001 /* response code is second token in response line */
extern void txtproto_print(netdissect_options *, const u_char *, u_int,
const char **, u_int);
/*
* Locale-independent macros for testing character properties and
* stripping the 8th bit from characters.
*
* Byte values outside the ASCII range are considered unprintable, so
* both ND_ISPRINT() and ND_ISGRAPH() return "false" for them.
*
* Assumed to be handed a value between 0 and 255, i.e. don't hand them
* a char, as those might be in the range -128 to 127.
*/
#define ND_ISASCII(c) (!((c) & 0x80)) /* value is an ASCII code point */
#define ND_ISPRINT(c) ((c) >= 0x20 && (c) <= 0x7E)
#define ND_ISGRAPH(c) ((c) > 0x20 && (c) <= 0x7E)
#define ND_TOASCII(c) ((c) & 0x7F)
/*
* Locale-independent macros for coverting to upper or lower case.
*
* Byte values outside the ASCII range are not converted. Byte values
* *in* the ASCII range are converted to byte values in the ASCII range;
* in particular, 'i' is upper-cased to 'I" and 'I' is lower-cased to 'i',
* even in Turkish locales.
*
* Assumed to be handed a value between 0 and 255, i.e. don't hand
* them a char, as those might be in the range -128 to 127.
*/
#define ND_TOLOWER(c) (((c) >= 'A' && (c) <= 'Z') ? (c) - 'A' + 'a' : (c))
#define ND_TOUPPER(c) (((c) >= 'a' && (c) <= 'z') ? (c) - 'a' + 'A' : (c))
#if (defined(__i386__) || defined(_M_IX86) || defined(__X86__) || defined(__x86_64__) || defined(_M_X64)) || \
(defined(__arm__) || defined(_M_ARM) || defined(__aarch64__)) || \
(defined(__m68k__) && (!defined(__mc68000__) && !defined(__mc68010__))) || \
(defined(__ppc__) || defined(__ppc64__) || defined(_M_PPC) || defined(_ARCH_PPC) || defined(_ARCH_PPC64)) || \
(defined(__s390__) || defined(__s390x__) || defined(__zarch__)) || \
defined(__vax__)
/*
* The procesor natively handles unaligned loads, so just use memcpy()
* and memcmp(), to enable those optimizations.
*
* XXX - are those all the x86 tests we need?
* XXX - do we need to worry about ARMv1 through ARMv5, which didn't
* support unaligned loads, and, if so, do we need to worry about all
* of them, or just some of them, e.g. ARMv5?
* XXX - are those the only 68k tests we need not to generated
* unaligned accesses if the target is the 68000 or 68010?
* XXX - are there any tests we don't need, because some definitions are for
* compilers that also predefine the GCC symbols?
* XXX - do we need to test for both 32-bit and 64-bit versions of those
* architectures in all cases?
*/
#define UNALIGNED_MEMCPY(p, q, l) memcpy((p), (q), (l))
#define UNALIGNED_MEMCMP(p, q, l) memcmp((p), (q), (l))
#else
/*
* The processor doesn't natively handle unaligned loads,
* and the compiler might "helpfully" optimize memcpy()
* and memcmp(), when handed pointers that would normally
* be properly aligned, into sequences that assume proper
* alignment.
*
* Do copies and compares of possibly-unaligned data by
* calling routines that wrap memcpy() and memcmp(), to
* prevent that optimization.
*/
extern void unaligned_memcpy(void *, const void *, size_t);
extern int unaligned_memcmp(const void *, const void *, size_t);
#define UNALIGNED_MEMCPY(p, q, l) unaligned_memcpy((p), (q), (l))
#define UNALIGNED_MEMCMP(p, q, l) unaligned_memcmp((p), (q), (l))
#endif
#define PLURAL_SUFFIX(n) \
(((n) != 1) ? "s" : "")
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 if_printer lookup_printer(int);
#define ND_DEBUG {printf(" [%s:%d %s] ", __FILE__, __LINE__, __FUNCTION__); fflush(stdout);}
/* The DLT printer routines */
extern u_int ap1394_if_print IF_PRINTER_ARGS;
extern u_int arcnet_if_print IF_PRINTER_ARGS;
extern u_int arcnet_linux_if_print IF_PRINTER_ARGS;
extern u_int atm_if_print IF_PRINTER_ARGS;
extern u_int bt_if_print IF_PRINTER_ARGS;
extern u_int brcm_tag_if_print IF_PRINTER_ARGS;
extern u_int brcm_tag_prepend_if_print IF_PRINTER_ARGS;
extern u_int chdlc_if_print IF_PRINTER_ARGS;
extern u_int cip_if_print IF_PRINTER_ARGS;
extern u_int enc_if_print IF_PRINTER_ARGS;
extern u_int ether_if_print IF_PRINTER_ARGS;
extern u_int fddi_if_print IF_PRINTER_ARGS;
extern u_int fr_if_print IF_PRINTER_ARGS;
extern u_int ieee802_11_if_print IF_PRINTER_ARGS;
extern u_int ieee802_11_radio_avs_if_print IF_PRINTER_ARGS;
extern u_int ieee802_11_radio_if_print IF_PRINTER_ARGS;
extern u_int ieee802_15_4_if_print IF_PRINTER_ARGS;
extern u_int ieee802_15_4_tap_if_print IF_PRINTER_ARGS;
extern u_int ipfc_if_print IF_PRINTER_ARGS;
extern u_int ipnet_if_print IF_PRINTER_ARGS;
extern u_int juniper_atm1_if_print IF_PRINTER_ARGS;
extern u_int juniper_atm2_if_print IF_PRINTER_ARGS;
extern u_int juniper_chdlc_if_print IF_PRINTER_ARGS;
extern u_int juniper_es_if_print IF_PRINTER_ARGS;
extern u_int juniper_ether_if_print IF_PRINTER_ARGS;
extern u_int juniper_frelay_if_print IF_PRINTER_ARGS;
extern u_int juniper_ggsn_if_print IF_PRINTER_ARGS;
extern u_int juniper_mfr_if_print IF_PRINTER_ARGS;
extern u_int juniper_mlfr_if_print IF_PRINTER_ARGS;
extern u_int juniper_mlppp_if_print IF_PRINTER_ARGS;
extern u_int juniper_monitor_if_print IF_PRINTER_ARGS;
extern u_int juniper_ppp_if_print IF_PRINTER_ARGS;
extern u_int juniper_pppoe_atm_if_print IF_PRINTER_ARGS;
extern u_int juniper_pppoe_if_print IF_PRINTER_ARGS;
extern u_int juniper_services_if_print IF_PRINTER_ARGS;
extern u_int lane_if_print IF_PRINTER_ARGS;
extern u_int ltalk_if_print IF_PRINTER_ARGS;
extern u_int mfr_if_print IF_PRINTER_ARGS;
extern u_int netanalyzer_if_print IF_PRINTER_ARGS;
extern u_int netanalyzer_transparent_if_print IF_PRINTER_ARGS;
extern u_int nflog_if_print IF_PRINTER_ARGS;
extern u_int null_if_print IF_PRINTER_ARGS;
extern u_int pflog_if_print IF_PRINTER_ARGS;
extern u_int pktap_if_print IF_PRINTER_ARGS;
extern u_int ppi_if_print IF_PRINTER_ARGS;
extern u_int ppp_bsdos_if_print IF_PRINTER_ARGS;
extern u_int ppp_hdlc_if_print IF_PRINTER_ARGS;
extern u_int ppp_if_print IF_PRINTER_ARGS;
extern u_int pppoe_if_print IF_PRINTER_ARGS;
extern u_int prism_if_print IF_PRINTER_ARGS;
extern u_int raw_if_print IF_PRINTER_ARGS;
extern u_int sl_bsdos_if_print IF_PRINTER_ARGS;
extern u_int sl_if_print IF_PRINTER_ARGS;
extern u_int sll_if_print IF_PRINTER_ARGS;
extern u_int sll2_if_print IF_PRINTER_ARGS;
extern u_int sunatm_if_print IF_PRINTER_ARGS;
extern u_int symantec_if_print IF_PRINTER_ARGS;
extern u_int token_if_print IF_PRINTER_ARGS;
extern u_int usb_linux_48_byte_if_print IF_PRINTER_ARGS;
extern u_int usb_linux_64_byte_if_print IF_PRINTER_ARGS;
/*
* Structure passed to some printers to allow them to print
* link-layer address information if ndo_eflag isn't set
* (because they are for protocols that don't have their
* own addresses, so that we'd want to report link-layer
* address information).
*
* This contains a pointer to an address and a pointer to a routine
* to which we pass that pointer in order to get a string.
*/
struct lladdr_info {
const char *(*addr_string)(netdissect_options *, const u_char *);
const u_char *addr;
};
/* The printer routines. */
extern void aarp_print(netdissect_options *, const u_char *, u_int);
extern int ah_print(netdissect_options *, const u_char *);
extern void ahcp_print(netdissect_options *, const u_char *, const u_int);
extern void aodv_print(netdissect_options *, const u_char *, u_int, int);
extern void aoe_print(netdissect_options *, const u_char *, const u_int);
extern void arp_print(netdissect_options *, const u_char *, u_int, u_int);
extern void ascii_print(netdissect_options *, const u_char *, u_int);
extern void atalk_print(netdissect_options *, const u_char *, u_int);
extern void atm_print(netdissect_options *, u_int, u_int, u_int, const u_char *, u_int, u_int);
extern void babel_print(netdissect_options *, const u_char *, u_int);
extern void beep_print(netdissect_options *, const u_char *, u_int);
extern void bfd_print(netdissect_options *, const u_char *, u_int, u_int);
extern void bgp_print(netdissect_options *, const u_char *, u_int);
extern const char *bgp_vpn_rd_print(netdissect_options *, const u_char *);
extern void bootp_print(netdissect_options *, const u_char *, u_int);
extern void calm_fast_print(netdissect_options *, const u_char *, u_int, const struct lladdr_info *);
extern void carp_print(netdissect_options *, const u_char *, u_int, u_int);
extern void cdp_print(netdissect_options *, const u_char *, u_int, u_int);
extern void cfm_print(netdissect_options *, const u_char *, u_int);
extern u_int chdlc_print(netdissect_options *, const u_char *, u_int);
extern void cisco_autorp_print(netdissect_options *, const u_char *, u_int);
extern void cnfp_print(netdissect_options *, const u_char *);
extern void dccp_print(netdissect_options *, const u_char *, const u_char *, u_int);
extern void decnet_print(netdissect_options *, const u_char *, u_int, u_int);
extern void dhcp6_print(netdissect_options *, const u_char *, u_int);
extern int dstopt_print(netdissect_options *, const u_char *);
extern void dtp_print(netdissect_options *, const u_char *, u_int);
extern void dvmrp_print(netdissect_options *, const u_char *, u_int);
extern void eap_print(netdissect_options *, const u_char *, u_int);
extern void egp_print(netdissect_options *, const u_char *, u_int);
extern void eigrp_print(netdissect_options *, const u_char *, u_int);
extern int esp_print(netdissect_options *, const u_char *, const int, const u_char *, u_int *, u_int *);
extern u_int ether_print(netdissect_options *, const u_char *, u_int, u_int, void (*)(netdissect_options *, const u_char *), const u_char *);
extern u_int ether_print_hdr_len(netdissect_options *, const u_char *, u_int, u_int, void (*)(netdissect_options *, const u_char *), const u_char *, u_int);
extern int ethertype_print(netdissect_options *, u_short, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *);
extern u_int fddi_print(netdissect_options *, const u_char *, u_int, u_int);
extern void forces_print(netdissect_options *, const u_char *, u_int);
extern u_int fr_print(netdissect_options *, const u_char *, u_int);
extern int frag6_print(netdissect_options *, const u_char *, const u_char *);
extern void ftp_print(netdissect_options *, const u_char *, u_int);
extern void geneve_print(netdissect_options *, const u_char *, u_int);
extern void geonet_print(netdissect_options *, const u_char *, u_int, const struct lladdr_info *);
extern void gre_print(netdissect_options *, const u_char *, u_int);
extern int hbhopt_print(netdissect_options *, const u_char *);
extern void hex_and_ascii_print(netdissect_options *, const char *, const u_char *, u_int);
extern void hex_print(netdissect_options *, const char *ident, const u_char *cp, u_int);
extern void hex_print_with_offset(netdissect_options *, const char *ident, const u_char *cp, u_int, u_int);
extern void hncp_print(netdissect_options *, const u_char *, u_int);
extern void hsrp_print(netdissect_options *, const u_char *, u_int);
extern void http_print(netdissect_options *, const u_char *, u_int);
extern void icmp6_print(netdissect_options *, const u_char *, u_int, const u_char *, int);
extern void icmp_print(netdissect_options *, const u_char *, u_int, const u_char *, int);
extern u_int ieee802_15_4_print(netdissect_options *ndo, const u_char *p, u_int caplen);
extern u_int ieee802_11_radio_print(netdissect_options *, const u_char *, u_int, u_int);
extern void igmp_print(netdissect_options *, const u_char *, u_int);
extern void igrp_print(netdissect_options *, const u_char *, u_int);
extern void ip6_print(netdissect_options *, const u_char *, u_int);
extern void ipN_print(netdissect_options *, const u_char *, u_int);
extern void ip_print(netdissect_options *, const u_char *, u_int);
extern void ip_inner_print(netdissect_options *, const u_char *, u_int, u_int nh, const u_char *);
extern void ipcomp_print(netdissect_options *, const u_char *);
extern void ipx_netbios_print(netdissect_options *, const u_char *, u_int);
extern void ipx_print(netdissect_options *, const u_char *, u_int);
extern void isakmp_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void isakmp_rfc3948_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void isoclns_print(netdissect_options *, const u_char *, u_int);
extern void krb_print(netdissect_options *, const u_char *);
extern void l2tp_print(netdissect_options *, const u_char *, u_int);
extern void lane_print(netdissect_options *, const u_char *, u_int, u_int);
extern void ldp_print(netdissect_options *, const u_char *, u_int);
extern void lisp_print(netdissect_options *, const u_char *, u_int);
extern u_int llap_print(netdissect_options *, const u_char *, u_int);
extern int llc_print(netdissect_options *, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *);
extern void lldp_print(netdissect_options *, const u_char *, u_int);
extern void lmp_print(netdissect_options *, const u_char *, u_int);
extern void loopback_print(netdissect_options *, const u_char *, const u_int);
extern void lspping_print(netdissect_options *, const u_char *, u_int);
extern void lwapp_control_print(netdissect_options *, const u_char *, u_int, int);
extern void lwapp_data_print(netdissect_options *, const u_char *, u_int);
extern void lwres_print(netdissect_options *, const u_char *, u_int);
extern void m3ua_print(netdissect_options *, const u_char *, const u_int);
extern void medsa_print(netdissect_options *, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *);
extern u_int mfr_print(netdissect_options *, const u_char *, u_int);
extern void mobile_print(netdissect_options *, const u_char *, u_int);
extern int mobility_print(netdissect_options *, const u_char *, const u_char *);
extern void mpcp_print(netdissect_options *, const u_char *, u_int);
extern void mpls_print(netdissect_options *, const u_char *, u_int);
extern int mptcp_print(netdissect_options *, const u_char *, u_int, u_char);
extern void msdp_print(netdissect_options *, const u_char *, u_int);
extern void msnlb_print(netdissect_options *, const u_char *);
extern void nbt_tcp_print(netdissect_options *, const u_char *, u_int);
extern void nbt_udp137_print(netdissect_options *, const u_char *, u_int);
extern void nbt_udp138_print(netdissect_options *, const u_char *, u_int);
extern void netbeui_print(netdissect_options *, u_short, const u_char *, u_int);
extern void nfsreply_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void nfsreply_noaddr_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void nfsreq_noaddr_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern const u_char * ns_nprint(netdissect_options *, const u_char *, const u_char *);
extern void domain_print(netdissect_options *, const u_char *, u_int, int);
extern void nsh_print(netdissect_options *ndo, const u_char *bp, u_int len);
extern void ntp_print(netdissect_options *, const u_char *, u_int);
extern void oam_print(netdissect_options *, const u_char *, u_int, u_int);
extern void olsr_print(netdissect_options *, const u_char *, u_int, int);
extern void openflow_print(netdissect_options *, const u_char *, const u_int);
extern void ospf6_print(netdissect_options *, const u_char *, u_int);
extern void ospf_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern int ospf_grace_lsa_print(netdissect_options *, const u_char *, u_int);
extern int ospf_te_lsa_print(netdissect_options *, const u_char *, u_int);
extern void otv_print(netdissect_options *, const u_char *, u_int);
extern void pgm_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void pim_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void pimv1_print(netdissect_options *, const u_char *, u_int);
extern u_int ppp_print(netdissect_options *, const u_char *, u_int);
extern u_int pppoe_print(netdissect_options *, const u_char *, u_int);
extern void pptp_print(netdissect_options *, const u_char *);
extern int print_unknown_data(netdissect_options *, const u_char *, const char *, int);
extern const char *q922_string(netdissect_options *, const u_char *, u_int);
extern void q933_print(netdissect_options *, const u_char *, u_int);
extern void radius_print(netdissect_options *, const u_char *, u_int);
extern void resp_print(netdissect_options *, const u_char *, u_int);
extern void rip_print(netdissect_options *, const u_char *, u_int);
extern void ripng_print(netdissect_options *, const u_char *, unsigned int);
extern void rpki_rtr_print(netdissect_options *, const u_char *, u_int);
extern void rrcp_print(netdissect_options *, const u_char *, u_int, const struct lladdr_info *, const struct lladdr_info *);
extern void rsvp_print(netdissect_options *, const u_char *, u_int);
extern int rt6_print(netdissect_options *, const u_char *, const u_char *);
extern void rtsp_print(netdissect_options *, const u_char *, u_int);
extern void rx_print(netdissect_options *, const u_char *, u_int, u_int, u_int, const u_char *);
extern void sctp_print(netdissect_options *, const u_char *, const u_char *, u_int);
extern void sflow_print(netdissect_options *, const u_char *, u_int);
extern void sip_print(netdissect_options *, const u_char *, u_int);
extern void slow_print(netdissect_options *, const u_char *, u_int);
extern void smb_data_print(netdissect_options *, const u_char *, u_int);
extern void smb_tcp_print(netdissect_options *, const u_char *, u_int);
extern void smtp_print(netdissect_options *, const u_char *, u_int);
extern int snap_print(netdissect_options *, const u_char *, u_int, u_int, const struct lladdr_info *, const struct lladdr_info *, u_int);
extern void snmp_print(netdissect_options *, const u_char *, u_int);
extern void stp_print(netdissect_options *, const u_char *, u_int);
extern void sunrpc_print(netdissect_options *, const u_char *, u_int, const u_char *);
extern void syslog_print(netdissect_options *, const u_char *, u_int);
extern void tcp_print(netdissect_options *, const u_char *, u_int, const u_char *, int);
extern void telnet_print(netdissect_options *, const u_char *, u_int);
extern void tftp_print(netdissect_options *, const u_char *, u_int);
extern void timed_print(netdissect_options *, const u_char *);
extern void tipc_print(netdissect_options *, const u_char *, u_int, u_int);
extern u_int token_print(netdissect_options *, const u_char *, u_int, u_int);
extern void udld_print(netdissect_options *, const u_char *, u_int);
extern void udp_print(netdissect_options *, const u_char *, u_int, const u_char *, int);
extern int vjc_print(netdissect_options *, const u_char *, u_short);
extern void vqp_print(netdissect_options *, const u_char *, u_int);
extern void vrrp_print(netdissect_options *, const u_char *, u_int, const u_char *, int);
extern void vtp_print(netdissect_options *, const u_char *, u_int);
extern void vxlan_gpe_print(netdissect_options *ndo, const u_char *bp, u_int len);
extern void vxlan_print(netdissect_options *, const u_char *, u_int);
extern void wb_print(netdissect_options *, const u_char *, u_int);
extern void zep_print(netdissect_options *, const u_char *, u_int);
extern void zephyr_print(netdissect_options *, const u_char *, int);
extern void zmtp1_print(netdissect_options *, const u_char *, u_int);
extern void zmtp1_datagram_print(netdissect_options *, const u_char *, const u_int);
/* checksum routines */
extern void init_checksum(void);
extern uint16_t verify_crc10_cksum(uint16_t, const u_char *, int);
extern uint16_t create_osi_cksum(const uint8_t *, int, int);
struct cksum_vec {
const uint8_t *ptr;
int len;
};
extern uint16_t in_cksum(const struct cksum_vec *, int);
extern uint16_t in_cksum_shouldbe(uint16_t, uint16_t);
extern uint16_t nextproto4_cksum(netdissect_options *, const struct ip *, const uint8_t *, u_int, u_int, u_int);
/* in print-ip6.c */
extern uint16_t nextproto6_cksum(netdissect_options *, const struct ip6_hdr *, const uint8_t *, u_int, u_int, u_int);
/* Utilities */
extern void nd_print_trunc(netdissect_options *);
extern void nd_print_protocol(netdissect_options *);
extern void nd_print_invalid(netdissect_options *);
extern int mask2plen(uint32_t);
extern int mask62plen(const u_char *);
extern const char *dnname_string(netdissect_options *, u_short);
extern const char *dnnum_string(netdissect_options *, u_short);
extern int decode_prefix4(netdissect_options *, const u_char *, u_int, char *, u_int);
extern int decode_prefix6(netdissect_options *, const u_char *, u_int, char *, u_int);
extern void esp_print_decodesecret(netdissect_options *);
extern int esp_print_decrypt_buffer_by_ikev2(netdissect_options *, int,
const u_char spii[8],
const u_char spir[8],
const u_char *, const u_char *);
#endif /* netdissect_h */
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