/* file.c
*
- * $Id: file.c,v 1.27 1999/10/31 17:46:06 gram Exp $
+ * $Id: file.c,v 1.56 2000/07/26 06:04:32 guy Exp $
*
* Wiretap Library
- * Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
+ * Copyright (c) 1998 by Gilbert Ramirez <gram@xiexie.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
-#include "wtap.h"
-#include "file.h"
+
+#ifdef HAVE_IO_H
+#include <io.h> /* open/close on win32 */
+#endif
+
+#include "wtap-int.h"
+#include "file_wrappers.h"
#include "buffer.h"
#include "lanalyzer.h"
#include "ngsniffer.h"
#include "netmon.h"
#include "netxray.h"
#include "toshiba.h"
+#include "i4btrace.h"
/* The open_file_* routines should return:
*
*/
ascend_open,
toshiba_open,
+ i4btrace_open,
};
-int wtap_def_seek_read (FILE *fh, int seek_off, guint8 *pd, int len)
+int wtap_def_seek_read(wtap *wth, int seek_off,
+ union wtap_pseudo_header *pseudo_header, guint8 *pd, int len)
{
- file_seek(fh, seek_off, SEEK_SET);
- return file_read(pd, sizeof(guint8), len, fh);
+ file_seek(wth->random_fh, seek_off, SEEK_SET);
+
+ return file_read(pd, sizeof(guint8), len, wth->random_fh);
}
#define N_FILE_TYPES (sizeof open_routines / sizeof open_routines[0])
-/* Opens a file and prepares a wtap struct */
-wtap* wtap_open_offline(const char *filename, int *err)
+/* Opens a file and prepares a wtap struct.
+ If "do_random" is TRUE, it opens the file twice; the second open
+ allows the application to do random-access I/O without moving
+ the seek offset for sequential I/O, which is used by Ethereal
+ so that it can do sequential I/O to a capture file that's being
+ written to as new packets arrive independently of random I/O done
+ to display protocol trees for packets when they're selected. */
+wtap* wtap_open_offline(const char *filename, int *err, gboolean do_random)
{
struct stat statb;
wtap *wth;
}
#ifndef WIN32
if (! S_ISREG(statb.st_mode) && ! S_ISFIFO(statb.st_mode)) {
- *err = WTAP_ERR_NOT_REGULAR_FILE;
+ if (S_ISDIR(statb.st_mode))
+ *err = EISDIR;
+ else
+ *err = WTAP_ERR_NOT_REGULAR_FILE;
return NULL;
}
#endif
errno = ENOMEM;
- wth = (wtap*)malloc(sizeof(wtap));
+ wth = g_malloc(sizeof(wtap));
if (wth == NULL) {
*err = errno;
return NULL;
}
+/* Win32 needs the O_BINARY flag for open() */
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
/* Open the file */
errno = WTAP_ERR_CANT_OPEN;
- if (!(wth->fd = open(filename, O_RDONLY))) {
+ wth->fd = open(filename, O_RDONLY|O_BINARY);
+ if (wth->fd < 0) {
*err = errno;
- free(wth);
+ g_free(wth);
return NULL;
}
if (!(wth->fh = filed_open(wth->fd, "rb"))) {
*err = errno;
- free(wth);
+ g_free(wth);
return NULL;
}
+ if (do_random) {
+ if (!(wth->random_fh = file_open(filename, "rb"))) {
+ *err = errno;
+ file_close(wth->fh);
+ g_free(wth);
+ return NULL;
+ }
+ } else
+ wth->random_fh = NULL;
+
/* initialization */
wth->file_encap = WTAP_ENCAP_UNKNOWN;
wth->data_offset = 0;
+ wth->subtype_sequential_close = NULL;
+ wth->subtype_close = NULL;
/* Try all file types */
for (i = 0; i < N_FILE_TYPES; i++) {
case -1:
/* I/O error - give up */
- /* XXX - why pass err to open_routines[i]() if err is
- * overwritten here? */
- *err = errno;
file_close(wth->fh);
- free(wth);
+ g_free(wth);
return NULL;
case 0:
}
/* Well, it's not one of the types of file we know about. */
+ if (wth->random_fh != NULL)
+ file_close(wth->random_fh);
file_close(wth->fh);
- free(wth);
+ g_free(wth);
*err = WTAP_ERR_FILE_UNKNOWN_FORMAT;
return NULL;
return wth;
}
+/* Table of the file types we know about. */
+const static struct file_type_info {
+ const char *name;
+ const char *short_name;
+ int (*can_write_encap)(int, int);
+ int (*dump_open)(wtap_dumper *, int *);
+} dump_open_table[WTAP_NUM_FILE_TYPES] = {
+ /* WTAP_FILE_UNKNOWN */
+ { NULL, NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_WTAP */
+ { "Wiretap (Ethereal)", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_PCAP */
+ { "libpcap (tcpdump, Ethereal, etc.)", "libpcap",
+ libpcap_dump_can_write_encap, libpcap_dump_open },
+
+ /* WTAP_FILE_PCAP_SS990417 */
+ { "Red Hat Linux 6.1 libpcap (tcpdump)", "rh6_1libpcap",
+ libpcap_dump_can_write_encap, libpcap_dump_open },
+
+ /* WTAP_FILE_PCAP_SS990915 */
+ { "SuSE Linux 6.3 libpcap (tcpdump)", "suse6_3libpcap",
+ libpcap_dump_can_write_encap, libpcap_dump_open },
+
+ /* WTAP_FILE_PCAP_SS991029 */
+ { "modified libpcap (tcpdump)", "modlibpcap",
+ libpcap_dump_can_write_encap, libpcap_dump_open },
+
+ /* WTAP_FILE_LANALYZER */
+ { "Novell LANalyzer", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_NGSNIFFER_UNCOMPRESSED */
+ { "Network Associates Sniffer (DOS-based)", "ngsniffer",
+ ngsniffer_dump_can_write_encap, ngsniffer_dump_open },
+
+ /* WTAP_FILE_NGSNIFFER_COMPRESSED */
+ { "Network Associates Sniffer (DOS-based), compressed", "ngsniffer_comp",
+ NULL, NULL },
+
+ /* WTAP_FILE_SNOOP */
+ { "Sun snoop", "snoop",
+ snoop_dump_can_write_encap, snoop_dump_open },
+
+ /* WTAP_FILE_IPTRACE_1_0 */
+ { "AIX iptrace 1.0", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_IPTRACE_2_0 */
+ { "AIX iptrace 2.0", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_NETMON_1_x */
+ { "Microsoft Network Monitor 1.x", "netmon1",
+ netmon_dump_can_write_encap, netmon_dump_open },
+
+ /* WTAP_FILE_NETMON_2_x */
+ { "Microsoft Network Monitor 2.x", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_NETXRAY_1_0 */
+ { "Cinco Networks NetXRay", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_NETXRAY_1_1 */
+ { "Network Associates Sniffer (Windows-based) 1.1", "ngwsniffer_1_1",
+ netxray_dump_can_write_encap, netxray_dump_open_1_1 },
+
+ /* WTAP_FILE_NETXRAY_2_00x */
+ { "Network Associates Sniffer (Windows-based) 2.00x", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_RADCOM */
+ { "RADCOM WAN/LAN analyzer", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_ASCEND */
+ { "Lucent/Ascend access server trace", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_NETTL */
+ { "HP-UX nettl trace", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_TOSHIBA */
+ { "Toshiba Compact ISDN Router snoop trace", NULL,
+ NULL, NULL },
+
+ /* WTAP_FILE_I4BTRACE */
+ { "I4B ISDN trace", NULL,
+ NULL, NULL },
+
+};
+
+/* Name that should be somewhat descriptive. */
+const char *wtap_file_type_string(int filetype)
+{
+ if (filetype < 0 || filetype >= WTAP_NUM_FILE_TYPES) {
+ g_error("Unknown capture file type %d", filetype);
+ return NULL;
+ } else
+ return dump_open_table[filetype].name;
+}
+
+/* Name to use in, say, a command-line flag specifying the type. */
+const char *wtap_file_type_short_string(int filetype)
+{
+ if (filetype < 0 || filetype >= WTAP_NUM_FILE_TYPES)
+ return NULL;
+ else
+ return dump_open_table[filetype].short_name;
+}
+
+/* Translate a short name to a capture file type. */
+int wtap_short_string_to_file_type(const char *short_name)
+{
+ int filetype;
+
+ for (filetype = 0; filetype < WTAP_NUM_FILE_TYPES; filetype++) {
+ if (dump_open_table[filetype].short_name != NULL &&
+ strcmp(short_name, dump_open_table[filetype].short_name) == 0)
+ return filetype;
+ }
+ return -1; /* no such file type, or we can't write it */
+}
+
+gboolean wtap_dump_can_open(int filetype)
+{
+ if (filetype < 0 || filetype >= WTAP_NUM_FILE_TYPES
+ || dump_open_table[filetype].dump_open == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+gboolean wtap_dump_can_write_encap(int filetype, int encap)
+{
+ if (filetype < 0 || filetype >= WTAP_NUM_FILE_TYPES
+ || dump_open_table[filetype].can_write_encap == NULL)
+ return FALSE;
+
+ if ((*dump_open_table[filetype].can_write_encap)(filetype, encap) != 0)
+ return FALSE;
+
+ return TRUE;
+}
static wtap_dumper* wtap_dump_open_common(FILE *fh, int filetype,
int encap, int snaplen, int *err);
/* 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");
+ fh = fopen(filename, "wb");
if (fh == NULL) {
*err = errno;
return NULL; /* can't create file */
/* 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");
+ fh = fdopen(fd, "wb");
if (fh == NULL) {
*err = errno;
return NULL; /* can't create standard I/O stream */
{
wtap_dumper *wdh;
- wdh = malloc(sizeof (wtap_dumper));
+ if (filetype < 0 || filetype >= WTAP_NUM_FILE_TYPES
+ || dump_open_table[filetype].dump_open == NULL) {
+ /* Invalid type, or type we don't know how to write. */
+ *err = WTAP_ERR_UNSUPPORTED_FILE_TYPE;
+ /* NOTE: this means the FD handed to "wtap_dump_fdopen()"
+ will be closed if we can't write that file type. */
+ fclose(fh);
+ return NULL;
+ }
+
+ /* OK, we know how to write that type; can we write the specified
+ encapsulation type? */
+ *err = (*dump_open_table[filetype].can_write_encap)(filetype, encap);
+ if (*err != 0) {
+ /* NOTE: this means the FD handed to "wtap_dump_fdopen()"
+ will be closed if we can't write that encapsulation type. */
+ fclose(fh);
+ return NULL;
+ }
+
+ /* OK, we can write the specified encapsulation type. Allocate
+ a data structure for the output stream. */
+ wdh = g_malloc(sizeof (wtap_dumper));
if (wdh == NULL) {
*err = errno;
/* NOTE: this means the FD handed to "wtap_dump_fdopen()"
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;
+ wdh->dump.opaque = NULL;
+ wdh->subtype_write = NULL;
+ wdh->subtype_close = NULL;
+
+ /* Now try to open the file for writing. */
+ if (!(*dump_open_table[filetype].dump_open)(wdh, err)) {
+ /* The attempt failed. */
+ g_free(wdh);
+ /* NOTE: this means the FD handed to "wtap_dump_fdopen()"
+ will be closed if the open fails. */
+ fclose(fh);
+ return NULL;
}
- return wdh;
-fail:
- free(wdh);
- fclose(fh);
- return NULL; /* XXX - provide a reason why we failed */
+ return wdh; /* success! */
}
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, int *err)
+gboolean wtap_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
+ const union wtap_pseudo_header *pseudo_header, const u_char *pd, int *err)
{
- return (wdh->subtype_write)(wdh, phdr, pd, err);
+ return (wdh->subtype_write)(wdh, phdr, pseudo_header, pd, err);
}
-int wtap_dump_close(wtap_dumper *wdh, int *err)
+gboolean wtap_dump_close(wtap_dumper *wdh, int *err)
{
- int ret = 1;
+ gboolean ret = TRUE;
- if (!(wdh->subtype_close)(wdh, err))
- ret = 0;
+ if (wdh->subtype_close != NULL) {
+ /* There's a close routine for this dump stream. */
+ if (!(wdh->subtype_close)(wdh, err))
+ ret = FALSE;
+ }
errno = WTAP_ERR_CANT_CLOSE;
if (fclose(wdh->fh) == EOF) {
if (ret) {
if (err != NULL)
*err = errno;
}
- ret = 0;
+ ret = FALSE;
}
- free(wdh);
+ if (wdh->dump.opaque != NULL)
+ g_free(wdh->dump.opaque);
+ g_free(wdh);
return ret;
}
-
-/*
- * Routine to return a Wiretap error code (0 for no error, an errno
- * for a file error, or a WTAP_ERR_ code for other errors) for an
- * I/O stream.
- */
-#ifdef HAVE_LIBZ
-int
-file_error(void *fh)
-{
- int errnum;
-
- gzerror(fh, &errnum);
- switch (errnum) {
-
- case Z_OK: /* no error */
- return 0;
-
- case Z_STREAM_END: /* EOF - not an error */
- return 0;
-
- case Z_ERRNO: /* file I/O error */
- return errno;
-
- default:
- return WTAP_ERR_ZLIB + errnum;
- }
-}
-#else /* HAVE_LIBZ */
-int
-file_error(FILE *fh)
-{
- if (ferror(fh))
- return errno;
- else
- return 0;
-}
-#endif /* HAVE_LIBZ */
git.samba.org / obnox / wireshark / wip.git / blobdiff