473 lines
20 KiB
C
473 lines
20 KiB
C
/* packet.h
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* Definitions for packet disassembly structures and routines
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*
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* $Id: packet.h,v 1.149 1999/11/21 20:02:32 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __PACKET_H__
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#define __PACKET_H__
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#ifndef __WTAP_H__
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#include "wiretap/wtap.h"
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#endif
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#ifndef __PROTO_H__
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#include "proto.h"
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#endif
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/* Pointer versions of ntohs and ntohl. Given a pointer to a member of a
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* byte array, returns the value of the two or four bytes at the pointer.
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* The pletoh[sl] versions return the little-endian representation.
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*/
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#define pntohs(p) ((guint16) \
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((guint16)*((guint8 *)p+0)<<8| \
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(guint16)*((guint8 *)p+1)<<0))
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#define pntohl(p) ((guint32)*((guint8 *)p+0)<<24| \
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(guint32)*((guint8 *)p+1)<<16| \
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(guint32)*((guint8 *)p+2)<<8| \
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(guint32)*((guint8 *)p+3)<<0)
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#define pletohs(p) ((guint16) \
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((guint16)*((guint8 *)p+1)<<8| \
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(guint16)*((guint8 *)p+0)<<0))
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#define pletohl(p) ((guint32)*((guint8 *)p+3)<<24| \
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(guint32)*((guint8 *)p+2)<<16| \
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(guint32)*((guint8 *)p+1)<<8| \
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(guint32)*((guint8 *)p+0)<<0)
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#define hi_nibble(b) ((b & 0xf0) >> 4)
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#define lo_nibble(b) (b & 0x0f)
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/* Useful when you have an array whose size you can tell at compile-time */
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#define array_length(x) (sizeof x / sizeof x[0])
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/* Useful when highlighting regions inside a dissect_*() function. With this
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* macro, you can highlight from an arbitrary offset to the end of the
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* packet (which may come before the end of the frame).
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* See dissect_data() for an example.
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*/
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#define END_OF_FRAME (pi.captured_len - offset)
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/* Check whether the "len" bytes of data starting at "offset" is
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* entirely inside the captured data for this packet. */
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#define BYTES_ARE_IN_FRAME(offset, len) ((offset) + (len) <= pi.captured_len)
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/* Check whether there's any data at all starting at "offset". */
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#define IS_DATA_IN_FRAME(offset) ((offset) < pi.captured_len)
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/* To pass one of two strings, singular or plural */
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#define plurality(d,s,p) ((d) == 1 ? (s) : (p))
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typedef struct _column_info {
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gint num_cols; /* Number of columns */
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gint *col_fmt; /* Format of column */
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gboolean **fmt_matx; /* Specifies which formats apply to a column */
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gint *col_width; /* Column widths to use during a "-S" capture */
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gchar **col_title; /* Column titles */
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gchar **col_data; /* Column data */
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} column_info;
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#define COL_MAX_LEN 256
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#define COL_MAX_INFO_LEN 4096
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typedef struct _packet_counts {
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gint tcp;
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gint udp;
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gint icmp;
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gint ospf;
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gint gre;
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gint netbios;
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gint other;
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gint total;
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} packet_counts;
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/* XXX - some of this stuff is used only while a packet is being dissected;
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should we keep around a separate data structure for that, to save
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memory?
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Also, should the pseudo-header be supplied by Wiretap when you do a
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seek-and-read, so that we don't have to save it for all frames? */
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typedef struct _frame_data {
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struct _frame_data *next; /* Next element in list */
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struct _frame_data *prev; /* Previous element in list */
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guint32 num; /* Frame number */
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guint32 pkt_len; /* Packet length */
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guint32 cap_len; /* Amount actually captured */
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guint32 rel_secs; /* Relative seconds */
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guint32 rel_usecs; /* Relative microseconds */
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guint32 abs_secs; /* Absolute seconds */
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guint32 abs_usecs; /* Absolute microseconds */
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guint32 del_secs; /* Delta seconds */
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guint32 del_usecs; /* Delta microseconds */
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long file_off; /* File offset */
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column_info *cinfo; /* Column formatting information */
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gint row; /* Row number for this packet in the display */
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int lnk_t; /* Per-packet encapsulation/data-link type */
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gboolean passed_dfilter; /* TRUE = display, FALSE = no display */
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union pseudo_header pseudo_header; /* "pseudo-header" from wiretap */
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} frame_data;
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/* Types of addresses Ethereal knows about. */
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typedef enum {
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AT_NONE, /* no link-layer address */
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AT_ETHER, /* MAC (Ethernet, 802.x, FDDI) address */
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AT_IPv4, /* IPv4 */
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AT_IPv6, /* IPv6 */
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AT_IPX, /* IPX */
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AT_SNA, /* SNA */
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AT_ATALK, /* Appletalk DDP */
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AT_VINES /* Banyan Vines */
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} address_type;
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typedef struct _address {
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address_type type; /* type of address */
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int len; /* length of address, in bytes */
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const guint8 *data; /* bytes that constitute address */
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} address;
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#define SET_ADDRESS(addr, addr_type, addr_len, addr_data) { \
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(addr)->type = (addr_type); \
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(addr)->len = (addr_len); \
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(addr)->data = (addr_data); \
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}
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/* Types of port numbers Ethereal knows about. */
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typedef enum {
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PT_NONE, /* no port number */
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PT_TCP, /* TCP */
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PT_UDP /* UDP */
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} port_type;
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typedef struct _packet_info {
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int len;
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int captured_len;
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address dl_src; /* link-layer source address */
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address dl_dst; /* link-layer destination address */
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address net_src; /* network-layer source address */
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address net_dst; /* network-layer destination address */
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address src; /* source address (net if present, DL otherwise )*/
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address dst; /* destination address (net if present, DL otherwise )*/
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guint32 ipproto;
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port_type ptype; /* type of the following two port numbers */
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guint32 srcport; /* source port */
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guint32 destport; /* destination port */
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guint32 match_port;
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int iplen;
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int iphdrlen;
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} packet_info;
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extern packet_info pi;
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/* Struct for the match_strval function */
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typedef struct _value_string {
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guint32 value;
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gchar *strptr;
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} value_string;
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/* Struct for boolean enumerations */
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typedef struct true_false_string {
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char *true_string;
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char *false_string;
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} true_false_string;
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/* Many of the structs and definitions below and in packet-*.c files
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* were taken from include files in the Linux distribution. */
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typedef struct tcp_extra_data {
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int match_port;
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int sport;
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int dport;
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} tcp_extra_data;
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/* Utility routines used by packet*.c */
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gchar* ether_to_str(const guint8 *);
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gchar* ether_to_str_punct(const guint8 *, char);
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gchar* ip_to_str(const guint8 *);
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struct e_in6_addr;
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gchar* ip6_to_str(struct e_in6_addr *);
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gchar* ipx_addr_to_str(guint32, const guint8 *);
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gchar* abs_time_to_str(struct timeval*);
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gchar* rel_time_to_str(struct timeval*);
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gchar* time_secs_to_str(guint32);
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gchar* bytes_to_str(const guint8 *, int);
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const u_char *find_line_end(const u_char *data, const u_char *dataend,
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const u_char **eol);
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int get_token_len(const u_char *linep, const u_char *lineend,
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const u_char **next_token);
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gchar* format_text(const u_char *line, int len);
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gchar* val_to_str(guint32, const value_string *, const char *);
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gchar* match_strval(guint32, const value_string*);
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char * decode_bitfield_value(char *buf, guint32 val, guint32 mask, int width);
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const char *decode_boolean_bitfield(guint32 val, guint32 mask, int width,
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const char *truedesc, const char *falsedesc);
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const char *decode_enumerated_bitfield(guint32 val, guint32 mask, int width,
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const value_string *tab, const char *fmt);
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const char *decode_numeric_bitfield(guint32 val, guint32 mask, int width,
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const char *fmt);
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gint check_col(frame_data *, gint);
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#if __GNUC__ == 2
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void col_add_fstr(frame_data *, gint, gchar *, ...)
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__attribute__((format (printf, 3, 4)));
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void col_append_fstr(frame_data *, gint, gchar *, ...)
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__attribute__((format (printf, 3, 4)));
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#else
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void col_add_fstr(frame_data *, gint, gchar *, ...);
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void col_append_fstr(frame_data *, gint, gchar *, ...);
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#endif
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void col_add_str(frame_data *, gint, const gchar *);
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void col_append_str(frame_data *, gint, gchar *);
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void blank_packetinfo(void);
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/* Allow protocols to register "init" routines, which are called before
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we make a pass through a capture file and dissect all its packets
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(e.g., when we read in a new capture file, or run a "filter packets"
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or "colorize packets" pass over the current capture file). */
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void register_init_routine(void (*func)(void));
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/* Call all the registered "init" routines. */
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void init_all_protocols(void);
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void dissect_packet(const u_char *, frame_data *, proto_tree *);
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/*
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* Routines in packet-*.c
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* Routines should take three args: packet data *, cap_len, packet_counts *
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* They should never modify the packet data.
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*/
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void capture_clip(const u_char *, guint32, packet_counts *);
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void capture_eth(const u_char *, guint32, packet_counts *);
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void capture_fddi(const u_char *, guint32, packet_counts *);
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void capture_null(const u_char *, guint32, packet_counts *);
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void capture_ppp(const u_char *, guint32, packet_counts *);
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void capture_raw(const u_char *, guint32, packet_counts *);
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void capture_tr(const u_char *, guint32, packet_counts *);
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/*
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* Routines in packet-*.c
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* Routines should take four args: packet data *, offset, cap_len,
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* packet_counts *
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* They should never modify the packet data.
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*/
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void capture_netbios(const u_char *, int, guint32, packet_counts *);
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void capture_llc(const u_char *, int, guint32, packet_counts *);
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void capture_ip(const u_char *, int, guint32, packet_counts *);
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/*
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* Routines in packet-*.c
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* Routines should take three args: packet data *, frame_data *, tree *
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* They should never modify the packet data.
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*/
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void dissect_ascend(const u_char *, frame_data *, proto_tree *);
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void dissect_atm(const u_char *, frame_data *, proto_tree *);
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void dissect_clip(const u_char *, frame_data *, proto_tree *);
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void dissect_lapb(const u_char *, frame_data *, proto_tree *);
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void dissect_lapd(const u_char *, frame_data *, proto_tree *);
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void dissect_null(const u_char *, frame_data *, proto_tree *);
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void dissect_ppp(const u_char *, frame_data *, proto_tree *);
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void dissect_raw(const u_char *, frame_data *, proto_tree *);
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/*
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* Routines in packet-*.c
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* Routines should take four args: packet data *, frame_data *, tree *,
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* gboolean
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* They should never modify the packet data.
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*/
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void dissect_fddi(const u_char *, frame_data *, proto_tree *, gboolean);
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typedef void (*DissectFunc) (const u_char*, int, frame_data*, proto_tree*);
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/*
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* Routines in packet-*.c
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* Routines should take four args: packet data *, offset, frame_data *,
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* tree *
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* They should never modify the packet data.
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*/
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int dissect_ah(const u_char *, int, frame_data *, proto_tree *);
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void dissect_aarp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_afs(const u_char *, int, frame_data *, proto_tree *);
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void dissect_arp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_bgp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_bootp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_bpdu(const u_char *, int, frame_data *, proto_tree *);
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void dissect_cdp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_cotp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_data(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ddp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_dns(const u_char *, int, frame_data *, proto_tree *);
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void dissect_eigrp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_esp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_eth(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ftp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ftpdata(const u_char *, int, frame_data *, proto_tree *);
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void dissect_giop(const u_char *, int, frame_data *, proto_tree *);
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void dissect_hsrp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_http(const u_char *, int, frame_data *, proto_tree *);
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void dissect_icmp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_icmpv6(const u_char *, int, frame_data *, proto_tree *);
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void dissect_igmp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ip(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ipcomp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ipp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ipv6(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ipx(const u_char *, int, frame_data *, proto_tree *);
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void dissect_llc(const u_char *, int, frame_data *, proto_tree *);
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void dissect_lpd(const u_char *, int, frame_data *, proto_tree *);
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void dissect_mapi(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nbdgm(const u_char *, int, frame_data *, proto_tree *);
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void dissect_netbios(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nbipx(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nbns(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nbss(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ncp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nntp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ntp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_nwlink_dg(const u_char *, int, frame_data *, proto_tree *);
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void dissect_osi(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ospf(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ospf_hello(const u_char *, int, frame_data *, proto_tree *);
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void dissect_pim(const u_char *, int, frame_data *, proto_tree *);
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void dissect_pop(const u_char *, int, frame_data *, proto_tree *);
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void dissect_pppoed(const u_char *, int, frame_data *, proto_tree *);
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void dissect_pppoes(const u_char *, int, frame_data *, proto_tree *);
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void dissect_icp(const u_char *,int, frame_data *, proto_tree *);
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void dissect_icq(const u_char *,int, frame_data *, proto_tree *);
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void dissect_imap(const u_char *,int, frame_data *, proto_tree *);
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void dissect_isakmp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_pim(const u_char *, int, frame_data *, proto_tree *);
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void dissect_q931(const u_char *, int, frame_data *, proto_tree *);
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void dissect_q2931(const u_char *, int, frame_data *, proto_tree *);
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void dissect_radius(const u_char *, int, frame_data *, proto_tree *);
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void dissect_rip(const u_char *, int, frame_data *, proto_tree *);
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void dissect_ripng(const u_char *, int, frame_data *, proto_tree *);
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void dissect_rsvp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_rtsp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_rx(const u_char *, int, frame_data *, proto_tree *);
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void dissect_sap(const u_char *, int, frame_data *, proto_tree *);
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void dissect_sdp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_sna(const u_char *, int, frame_data *, proto_tree *);
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void dissect_snmp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_sscop(const u_char *, int, frame_data *, proto_tree *);
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void dissect_tcp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_telnet(const u_char *, int, frame_data *, proto_tree *);
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void dissect_tftp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_tr(const u_char *, int, frame_data *, proto_tree *);
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void dissect_trmac(const u_char *, int, frame_data *, proto_tree *);
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void dissect_udp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_arp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_frp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_icp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_ipc(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_rtp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vines_spp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vlan(const u_char *, int, frame_data *, proto_tree *);
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void dissect_vrrp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_payload_ppp(const u_char *, int, frame_data *, proto_tree *);
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void dissect_x25(const u_char *, int, frame_data *, proto_tree *);
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void dissect_yhoo(const u_char *, int, frame_data *, proto_tree *);
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void dissect_smb(const u_char *, int, frame_data *, proto_tree *, int);
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void dissect_pptp(const u_char *, int, frame_data *, proto_tree *);
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|
void dissect_gre(const u_char *, int, frame_data *, proto_tree *);
|
|
|
|
/*
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|
* Routines in packet-*.c
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|
* Routines should take four args: packet data *, offset, frame_data *,
|
|
* tree *
|
|
* They should never modify the packet data.
|
|
* They should return TRUE if the packet is of the type the routine would
|
|
* dissect, FALSE otherwise.
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|
*/
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|
gboolean dissect_rpc(const u_char *, int, frame_data *, proto_tree *);
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|
|
|
void init_dissect_rpc(void);
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|
void init_dissect_udp(void);
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|
void init_dissect_x25(void);
|
|
|
|
/* These functions are in ethertype.c */
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|
void capture_ethertype(guint16 etype, int offset,
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|
const u_char *pd, guint32 cap_len, packet_counts *ld);
|
|
void ethertype(guint16 etype, int offset,
|
|
const u_char *pd, frame_data *fd, proto_tree *tree,
|
|
proto_tree *fh_tree, int item_id);
|
|
extern const value_string etype_vals[];
|
|
|
|
/* These functions are in packet-arp.c */
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|
gchar *arphrdaddr_to_str(guint8 *ad, int ad_len, guint16 type);
|
|
gchar *arphrdtype_to_str(guint16 hwtype, const char *fmt);
|
|
|
|
/* ipproto.c */
|
|
extern const char *ipprotostr(int proto);
|
|
|
|
/*
|
|
* All of the possible columns in summary listing.
|
|
*
|
|
* NOTE: The SRC and DST entries MUST remain in this order, or else you
|
|
* need to fix the offset #defines before get_column_format!
|
|
*/
|
|
enum {
|
|
COL_NUMBER, /* Packet list item number */
|
|
COL_CLS_TIME, /* Command line-specified time (default relative) */
|
|
COL_REL_TIME, /* Relative time */
|
|
COL_ABS_TIME, /* Absolute time */
|
|
COL_DELTA_TIME, /* Delta time */
|
|
COL_DEF_SRC, /* Source address */
|
|
COL_RES_SRC, /* Resolved source */
|
|
COL_UNRES_SRC, /* Unresolved source */
|
|
COL_DEF_DL_SRC, /* Data link layer source address */
|
|
COL_RES_DL_SRC, /* Resolved DL source */
|
|
COL_UNRES_DL_SRC, /* Unresolved DL source */
|
|
COL_DEF_NET_SRC, /* Network layer source address */
|
|
COL_RES_NET_SRC, /* Resolved net source */
|
|
COL_UNRES_NET_SRC, /* Unresolved net source */
|
|
COL_DEF_DST, /* Destination address */
|
|
COL_RES_DST, /* Resolved dest */
|
|
COL_UNRES_DST, /* Unresolved dest */
|
|
COL_DEF_DL_DST, /* Data link layer dest address */
|
|
COL_RES_DL_DST, /* Resolved DL dest */
|
|
COL_UNRES_DL_DST, /* Unresolved DL dest */
|
|
COL_DEF_NET_DST, /* Network layer dest address */
|
|
COL_RES_NET_DST, /* Resolved net dest */
|
|
COL_UNRES_NET_DST, /* Unresolved net dest */
|
|
COL_DEF_SRC_PORT, /* Source port */
|
|
COL_RES_SRC_PORT, /* Resolved source port */
|
|
COL_UNRES_SRC_PORT, /* Unresolved source port */
|
|
COL_DEF_DST_PORT, /* Destination port */
|
|
COL_RES_DST_PORT, /* Resolved dest port */
|
|
COL_UNRES_DST_PORT, /* Unresolved dest port */
|
|
COL_PROTOCOL, /* Protocol */
|
|
COL_INFO, /* Description */
|
|
COL_PACKET_LENGTH, /* Packet length in bytes */
|
|
NUM_COL_FMTS /* Should always be last */
|
|
};
|
|
|
|
#endif /* packet.h */
|