194 lines
4.8 KiB
C
194 lines
4.8 KiB
C
/* wtap.h
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*
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* $Id: wtap.h,v 1.16 1999/03/22 02:46:46 guy Exp $
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
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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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*/
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#ifndef __WTAP_H__
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#define __WTAP_H__
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/* Encapsulation types. Choose names that truly reflect
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* what is contained in the packet trace file. */
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#define WTAP_ENCAP_NONE 0
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#define WTAP_ENCAP_ETHERNET 1
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#define WTAP_ENCAP_TR 2
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#define WTAP_ENCAP_SLIP 3
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#define WTAP_ENCAP_PPP 4
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#define WTAP_ENCAP_FDDI 5
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#define WTAP_ENCAP_RAW_IP 6
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#define WTAP_ENCAP_ARCNET 7
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#define WTAP_ENCAP_ATM_RFC1483 8
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/* last WTAP_ENCAP_ value + 1 */
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#define WTAP_NUM_ENCAP_TYPES 9
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/* File types that can be read by wiretap */
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#define WTAP_FILE_UNKNOWN 0
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#define WTAP_FILE_WTAP 1
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#define WTAP_FILE_PCAP 2
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#define WTAP_FILE_LANALYZER 3
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#define WTAP_FILE_NGSNIFFER 4
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#define WTAP_FILE_SNOOP 6
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#define WTAP_FILE_IPTRACE 7
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#define WTAP_FILE_NETMON 8
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#define WTAP_FILE_NETXRAY 9
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/* Filter types that wiretap can create. An 'offline' filter is really
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* a BPF filter, but it is treated specially because wiretap might not know
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* in advance the datalink type(s) needed.
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*/
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#define WTAP_FILTER_NONE 0
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#define WTAP_FILTER_OFFLINE 1
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#define WTAP_FILTER_BPF 2
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#include <sys/types.h>
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#include <sys/time.h>
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#include <glib.h>
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#include <stdio.h>
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typedef struct {
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double timeunit;
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time_t start;
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guint16 pkt_len;
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guint16 size;
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guint16 true_size;
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double t;
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int is_atm;
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} ngsniffer_t;
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typedef struct {
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guint16 pkt_len;
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guint32 totpktt;
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time_t start;
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} lanalyzer_t;
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typedef struct {
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int byte_swapped;
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guint16 version_major;
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guint16 version_minor;
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} libpcap_t;
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typedef struct {
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time_t start_secs;
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guint32 start_msecs;
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int end_offset;
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} netmon_t;
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typedef struct {
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time_t start_time;
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double timeunit;
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double start_timestamp;
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int wrapped;
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int end_offset;
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int version_major;
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} netxray_t;
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struct wtap_pkthdr {
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struct timeval ts;
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guint32 caplen;
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guint32 len;
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int pkt_encap;
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};
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typedef void (*wtap_handler)(u_char*, const struct wtap_pkthdr*,
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int, const u_char *);
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struct wtap;
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struct bpf_instruction;
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struct Buffer;
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typedef int (*subtype_func)(struct wtap*);
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typedef struct wtap {
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FILE* fh;
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int file_type;
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int snapshot_length;
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struct Buffer *frame_buffer;
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struct wtap_pkthdr phdr;
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union {
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libpcap_t *pcap;
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lanalyzer_t *lanalyzer;
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ngsniffer_t *ngsniffer;
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netmon_t *netmon;
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netxray_t *netxray;
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} capture;
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subtype_func subtype_read;
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int file_encap; /* per-file, for those
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file formats that have
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per-file encapsulation
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types */
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union {
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struct bpf_instruction *bpf;
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struct bpf_instruction **offline;
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} filter;
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gchar *filter_text;
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int filter_type;
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int filter_length; /* length in bytes or records,
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depending upon filter_type */
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int *offline_filter_lengths;
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} wtap;
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wtap* wtap_open_offline(char *filename);
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void wtap_loop(wtap *wth, int, wtap_handler, u_char*);
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int wtap_offline_filter(wtap *wth, char *filter);
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FILE* wtap_file(wtap *wth);
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int wtap_snapshot_length(wtap *wth); /* per file */
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int wtap_file_type(wtap *wth);
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void wtap_close(wtap *wth);
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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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#ifndef pntohs
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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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#endif
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#ifndef pntohl
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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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#endif
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#ifndef pletohs
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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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#endif
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#ifndef plethol
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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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#endif
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#endif /* __WTAP_H__ */
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