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/* file.c
*
* $Id: file.c,v 1.14 1999/08/18 04:17:37 guy Exp $
*
* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
#include "wtap.h"
#include "buffer.h"
#include "lanalyzer.h"
#include "ngsniffer.h"
#include "radcom.h"
#include "libpcap.h"
#include "snoop.h"
#include "iptrace.h"
#include "netmon.h"
#include "netxray.h"
/* The open_file_* routines should return the WTAP_FILE_* type
* that they are checking for if the file is successfully recognized
* as such. If the file is not of that type, the routine should return
* WTAP_FILE_UNKNOWN */
/* Opens a file and prepares a wtap struct */
wtap* wtap_open_offline(const char *filename, int *err)
{
struct stat statb;
wtap *wth;
/* First, make sure the file is valid */
if (stat(filename, &statb)) {
*err = errno;
return NULL;
}
#ifndef WIN32
if (! S_ISREG(statb.st_mode) && ! S_ISFIFO(statb.st_mode)) {
*err = WTAP_ERR_NOT_REGULAR_FILE;
return NULL;
}
#endif
wth = (wtap*)malloc(sizeof(wtap));
/* Open the file */
if (!(wth->fh = fopen(filename, "rb"))) {
*err = errno;
free(wth);
return NULL;
}
/* initialization */
wth->file_encap = WTAP_ENCAP_NONE;
/* Try all file types */
/* WTAP_FILE_PCAP */
if ((wth->file_type = libpcap_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_NGSNIFFER */
if ((wth->file_type = ngsniffer_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_RADCOM */
if ((wth->file_type = radcom_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_LANALYZER */
if ((wth->file_type = lanalyzer_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_SNOOP */
if ((wth->file_type = snoop_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_IPTRACE */
if ((wth->file_type = iptrace_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_NETMON_xxx */
if ((wth->file_type = netmon_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* WTAP_FILE_NETXRAY_xxx */
if ((wth->file_type = netxray_open(wth)) != WTAP_FILE_UNKNOWN) {
goto success;
}
/* failure: */
fclose(wth->fh);
free(wth);
*err = WTAP_ERR_FILE_UNKNOWN_FORMAT;
return NULL;
success:
wth->frame_buffer = g_malloc(sizeof(struct Buffer));
buffer_init(wth->frame_buffer, 1500);
return wth;
}
static wtap_dumper* wtap_dump_open_common(FILE *fh, int filetype,
int encap, int snaplen, int *err);
wtap_dumper* wtap_dump_open(const char *filename, int filetype, int encap,
int snaplen, int *err)
{
FILE *fh;
/* In case "fopen()" fails but doesn't set "errno", set "errno"
to a generic "the open failed" error. */
errno = WTAP_ERR_CANT_OPEN;
fh = fopen(filename, "w");
if (fh == NULL) {
*err = errno;
return NULL; /* can't create file */
}
return wtap_dump_open_common(fh, filetype, encap, snaplen, err);
}
wtap_dumper* wtap_dump_fdopen(int fd, int filetype, int encap, int snaplen,
int *err)
{
FILE *fh;
/* In case "fopen()" fails but doesn't set "errno", set "errno"
to a generic "the open failed" error. */
errno = WTAP_ERR_CANT_OPEN;
fh = fdopen(fd, "w");
if (fh == NULL) {
*err = errno;
return NULL; /* can't create standard I/O stream */
}
return wtap_dump_open_common(fh, filetype, encap, snaplen, err);
}
static wtap_dumper* wtap_dump_open_common(FILE *fh, int filetype, int encap,
int snaplen, int *err)
{
wtap_dumper *wdh;
wdh = malloc(sizeof (wtap_dumper));
if (wdh == NULL) {
*err = errno;
/* NOTE: this means the FD handed to "wtap_dump_fdopen()"
will be closed if the malloc fails. */
fclose(fh);
return NULL;
}
wdh->fh = fh;
wdh->file_type = filetype;
wdh->snaplen = snaplen;
wdh->encap = encap;
switch (filetype) {
case WTAP_FILE_PCAP:
if (!libpcap_dump_open(wdh, err))
goto fail;
break;
default:
/* We currently only support dumping "libpcap" files */
*err = WTAP_ERR_UNSUPPORTED_FILE_TYPE;
goto fail;
}
return wdh;
fail:
free(wdh);
fclose(fh);
return NULL; /* XXX - provide a reason why we failed */
}
FILE* wtap_dump_file(wtap_dumper *wdh)
{
return wdh->fh;
}
int wtap_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
const u_char *pd)
{
return (wdh->subtype_write)(wdh, phdr, pd);
}
int wtap_dump_close(wtap_dumper *wdh)
{
int ret = 1;
if (!(wdh->subtype_close)(wdh))
ret = 0;
ret = fclose(wdh->fh);
if (ret == EOF)
ret = 0;
free(wdh);
return ret;
}
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