* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <errno.h>
#include <string.h>
-#include "wftap-int.h"
#include "wtap-int.h"
#include "file_wrappers.h"
-#include "buffer.h"
#include "radcom.h"
struct frame_date {
};
static const guint8 active_time_magic[11] = {
- 0x41, 0x63, 0x74, 0x69, 0x76, 0x65, 0x20, 0x54, 0x69, 0x6d, 0x65
+ 'A', 'c', 't', 'i', 'v', 'e', ' ', 'T', 'i', 'm', 'e'
};
/* RADCOM record header - followed by frame data (perhaps including FCS).
char xxw[9]; /* unknown */
};
-static gboolean radcom_read(wftap *wfth, int *err, gchar **err_info,
+static gboolean radcom_read(wtap *wth, int *err, gchar **err_info,
gint64 *data_offset);
-static gboolean radcom_seek_read(wftap *wfth, gint64 seek_off,
- void* header, Buffer *buf, int *err, gchar **err_info);
-static gboolean radcom_read_rec(wftap *wfth, FILE_T fh, struct wtap_pkthdr *phdr,
+static gboolean radcom_seek_read(wtap *wth, gint64 seek_off,
+ struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info);
+static gboolean radcom_read_rec(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
Buffer *buf, int *err, gchar **err_info);
-static gboolean radcom_read_rec_data(FILE_T fh, guint8 *pd, int length,
- int *err, gchar **err_info);
-int radcom_open(wftap *wfth, int *err, gchar **err_info)
+wtap_open_return_val radcom_open(wtap *wth, int *err, gchar **err_info)
{
- int bytes_read;
guint8 r_magic[8], t_magic[11], search_encap[7];
struct frame_date start_date;
#if 0
#endif
/* Read in the string that should be at the start of a RADCOM file */
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(r_magic, 8, wfth->fh);
- if (bytes_read != 8) {
- *err = file_error(wfth->fh, err_info);
- if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
- return -1;
- return 0;
+ if (!wtap_read_bytes(wth->fh, r_magic, 8, err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
}
/* XXX: bytes 2 and 3 of the "magic" header seem to be different in some
r_magic[1] = 0xD2;
r_magic[2] = 0x00;
if (memcmp(r_magic, radcom_magic, 8) != 0) {
- return 0;
+ return WTAP_OPEN_NOT_MINE;
}
/* Look for the "Active Time" string. The "frame_date" structure should
* be located 32 bytes before the beginning of this string */
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(t_magic, 11, wfth->fh);
- if (bytes_read != 11) {
- *err = file_error(wfth->fh, err_info);
- if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
- return -1;
- return 0;
+ if (!wtap_read_bytes(wth->fh, t_magic, 11, err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
}
while (memcmp(t_magic, active_time_magic, 11) != 0)
{
- if (file_seek(wfth->fh, -10, SEEK_CUR, err) == -1)
- return -1;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(t_magic, 11, wfth->fh);
- if (bytes_read != 11) {
- *err = file_error(wfth->fh, err_info);
- if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
- return -1;
- return 0;
+ if (file_seek(wth->fh, -10, SEEK_CUR, err) == -1)
+ return WTAP_OPEN_ERROR;
+ if (!wtap_read_bytes(wth->fh, t_magic, 11, err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
}
}
- if (file_seek(wfth->fh, -43, SEEK_CUR, err) == -1) return -1;
+ if (file_seek(wth->fh, -43, SEEK_CUR, err) == -1)
+ return WTAP_OPEN_ERROR;
/* Get capture start time */
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(&start_date, sizeof(struct frame_date), wfth->fh);
- if (bytes_read != sizeof(struct frame_date)) {
- *err = file_error(wfth->fh, err_info);
- if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
- return -1;
- return 0;
+ if (!wtap_read_bytes(wth->fh, &start_date, sizeof(struct frame_date),
+ err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
+ }
+
+ /* So what time is this? */
+ if (!wtap_read_bytes(wth->fh, NULL, sizeof(struct frame_date),
+ err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
+ }
+
+ for (;;) {
+ if (!wtap_read_bytes(wth->fh, search_encap, 4,
+ err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
+ }
+
+ if (memcmp(encap_magic, search_encap, 4) == 0)
+ break;
+
+ /*
+ * OK, that's not it, go forward 1 byte - reading
+ * the magic moved us forward 4 bytes, so seeking
+ * backward 3 bytes moves forward 1 byte - and
+ * try the 4 bytes at that offset.
+ */
+ if (file_seek(wth->fh, -3, SEEK_CUR, err) == -1)
+ return WTAP_OPEN_ERROR;
+ }
+ if (!wtap_read_bytes(wth->fh, NULL, 12, err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
+ }
+ if (!wtap_read_bytes(wth->fh, search_encap, 4, err, err_info)) {
+ if (*err != WTAP_ERR_SHORT_READ)
+ return WTAP_OPEN_ERROR;
+ return WTAP_OPEN_NOT_MINE;
}
/* This is a radcom file */
- wfth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_RADCOM;
- wfth->subtype_read = radcom_read;
- wfth->subtype_seek_read = radcom_seek_read;
- wfth->snapshot_length = 0; /* not available in header, only in frame */
- wfth->tsprecision = WTAP_FILE_TSPREC_USEC;
+ wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_RADCOM;
+ wth->subtype_read = radcom_read;
+ wth->subtype_seek_read = radcom_seek_read;
+ wth->snapshot_length = 0; /* not available in header, only in frame */
+ wth->file_tsprec = WTAP_TSPREC_USEC;
#if 0
tm.tm_year = pletoh16(&start_date.year)-1900;
tm.tm_sec = sec%60;
tm.tm_isdst = -1;
#endif
- if (file_seek(wfth->fh, sizeof(struct frame_date), SEEK_CUR, err) == -1)
- return -1;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(search_encap, 4, wfth->fh);
- if (bytes_read != 4) {
- goto read_error;
- }
- while (memcmp(encap_magic, search_encap, 4)) {
- if (file_seek(wfth->fh, -3, SEEK_CUR, err) == -1)
- return -1;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(search_encap, 4, wfth->fh);
- if (bytes_read != 4) {
- goto read_error;
- }
- }
- if (file_seek(wfth->fh, 12, SEEK_CUR, err) == -1)
- return -1;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(search_encap, 4, wfth->fh);
- if (bytes_read != 4) {
- goto read_error;
- }
if (memcmp(search_encap, "LAPB", 4) == 0)
- wfth->file_encap = WTAP_ENCAP_LAPB;
+ wth->file_encap = WTAP_ENCAP_LAPB;
else if (memcmp(search_encap, "Ethe", 4) == 0)
- wfth->file_encap = WTAP_ENCAP_ETHERNET;
+ wth->file_encap = WTAP_ENCAP_ETHERNET;
else if (memcmp(search_encap, "ATM/", 4) == 0)
- wfth->file_encap = WTAP_ENCAP_ATM_RFC1483;
+ wth->file_encap = WTAP_ENCAP_ATM_RFC1483;
else {
- *err = WTAP_ERR_UNSUPPORTED_ENCAP;
+ *err = WTAP_ERR_UNSUPPORTED;
*err_info = g_strdup_printf("radcom: network type \"%.4s\" unknown", search_encap);
- return -1;
+ return WTAP_OPEN_ERROR;
}
#if 0
- bytes_read = file_read(&next_date, sizeof(struct frame_date), wfth->fh);
- errno = WTAP_ERR_CANT_READ;
- if (bytes_read != sizeof(struct frame_date)) {
- goto read_error;
- }
+ if (!wtap_read_bytes(wth->fh, &next_date, sizeof(struct frame_date),
+ err, err_info))
+ return WTAP_OPEN_ERROR;
while (memcmp(&start_date, &next_date, 4)) {
- if (file_seek(wfth->fh, 1-sizeof(struct frame_date), SEEK_CUR, err) == -1)
- return -1;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(&next_date, sizeof(struct frame_date),
- wfth->fh);
- if (bytes_read != sizeof(struct frame_date)) {
- goto read_error;
- }
+ if (file_seek(wth->fh, 1-sizeof(struct frame_date), SEEK_CUR, err) == -1)
+ return WTAP_OPEN_ERROR;
+ if (!wtap_read_bytes(wth->fh, &next_date, sizeof(struct frame_date),
+ err, err_info))
+ return WTAP_OPEN_ERROR;
}
#endif
- if (wfth->file_encap == WTAP_ENCAP_ETHERNET) {
- if (file_seek(wfth->fh, 294, SEEK_CUR, err) == -1)
- return -1;
- } else if (wfth->file_encap == WTAP_ENCAP_LAPB) {
- if (file_seek(wfth->fh, 297, SEEK_CUR, err) == -1)
- return -1;
- } else if (wfth->file_encap == WTAP_ENCAP_ATM_RFC1483) {
- if (file_seek(wfth->fh, 504, SEEK_CUR, err) == -1)
- return -1;
+ if (wth->file_encap == WTAP_ENCAP_ETHERNET) {
+ if (!wtap_read_bytes(wth->fh, NULL, 294, err, err_info))
+ return WTAP_OPEN_ERROR;
+ } else if (wth->file_encap == WTAP_ENCAP_LAPB) {
+ if (!wtap_read_bytes(wth->fh, NULL, 297, err, err_info))
+ return WTAP_OPEN_ERROR;
+ } else if (wth->file_encap == WTAP_ENCAP_ATM_RFC1483) {
+ if (!wtap_read_bytes(wth->fh, NULL, 504, err, err_info))
+ return WTAP_OPEN_ERROR;
}
- return 1;
-
-read_error:
- *err = file_error(wfth->fh, err_info);
- if (*err != 0)
- return -1;
- return 0;
+ return WTAP_OPEN_MINE;
}
/* Read the next packet */
-static gboolean radcom_read(wftap *wfth, int *err, gchar **err_info,
+static gboolean radcom_read(wtap *wth, int *err, gchar **err_info,
gint64 *data_offset)
{
- int bytes_read;
char fcs[2];
- wtap* wth = (wtap*)wfth->tap_specific_data;
- *data_offset = file_tell(wfth->fh);
+ *data_offset = file_tell(wth->fh);
- /* Read record header. */
- if (!radcom_read_rec(wfth, wfth->fh, &wth->phdr, wfth->frame_buffer,
+ /* Read record. */
+ if (!radcom_read_rec(wth, wth->fh, &wth->phdr, wth->frame_buffer,
err, err_info)) {
/* Read error or EOF */
return FALSE;
}
- if (wfth->file_encap == WTAP_ENCAP_LAPB) {
+ if (wth->file_encap == WTAP_ENCAP_LAPB) {
/* Read the FCS.
XXX - should we have some way of indicating the
presence and size of an FCS to our caller?
That'd let us handle other file types as well. */
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(&fcs, sizeof fcs, wfth->fh);
- if (bytes_read != sizeof fcs) {
- *err = file_error(wfth->fh, err_info);
- if (*err == 0)
- *err = WTAP_ERR_SHORT_READ;
+ if (!wtap_read_bytes(wth->fh, &fcs, sizeof fcs, err, err_info))
return FALSE;
- }
}
return TRUE;
}
static gboolean
-radcom_seek_read(wftap *wfth, gint64 seek_off,
- void* header, Buffer *buf,
+radcom_seek_read(wtap *wth, gint64 seek_off,
+ struct wtap_pkthdr *phdr, Buffer *buf,
int *err, gchar **err_info)
{
- struct wtap_pkthdr *phdr = (struct wtap_pkthdr *)header;
- if (file_seek(wfth->random_fh, seek_off, SEEK_SET, err) == -1)
+ if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
return FALSE;
/* Read record. */
- if (!radcom_read_rec(wfth, wfth->random_fh, phdr, buf, err,
+ if (!radcom_read_rec(wth, wth->random_fh, phdr, buf, err,
err_info)) {
/* Read error or EOF */
if (*err == 0) {
}
static gboolean
-radcom_read_rec(wftap *wfth, FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
+radcom_read_rec(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr, Buffer *buf,
int *err, gchar **err_info)
{
struct radcomrec_hdr hdr;
- int bytes_read;
guint16 data_length, real_length, length;
guint32 sec;
struct tm tm;
guint8 atmhdr[8];
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(&hdr, sizeof hdr, fh);
- if (bytes_read != sizeof hdr) {
- *err = file_error(fh, err_info);
- if (*err == 0 && bytes_read != 0)
- *err = WTAP_ERR_SHORT_READ;
+ if (!wtap_read_bytes_or_eof(fh, &hdr, sizeof hdr, err, err_info))
return FALSE;
- }
data_length = pletoh16(&hdr.data_length);
if (data_length == 0) {
}
length = pletoh16(&hdr.length);
real_length = pletoh16(&hdr.real_length);
+ /*
+ * The maximum value of length is 65535, which is less than
+ * WTAP_MAX_PACKET_SIZE_STANDARD will ever be, so we don't need to check
+ * it.
+ */
+ phdr->rec_type = REC_TYPE_PACKET;
phdr->presence_flags = WTAP_HAS_TS|WTAP_HAS_CAP_LEN;
tm.tm_year = pletoh16(&hdr.date.year)-1900;
phdr->ts.secs = mktime(&tm);
phdr->ts.nsecs = pletoh32(&hdr.date.usec) * 1000;
- switch (wfth->file_encap) {
+ switch (wth->file_encap) {
case WTAP_ENCAP_ETHERNET:
/* XXX - is there an FCS? */
* XXX - is this stuff a pseudo-header?
* The direction appears to be in the "hdr.dce" field.
*/
- if (!radcom_read_rec_data(wfth->fh, atmhdr, sizeof atmhdr, err,
+ if (!wtap_read_bytes(fh, atmhdr, sizeof atmhdr, err,
err_info))
return FALSE; /* Read error */
length -= 8;
return TRUE;
}
-static gboolean
-radcom_read_rec_data(FILE_T fh, guint8 *pd, int length, int *err,
- gchar **err_info)
-{
- int bytes_read;
-
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(pd, length, fh);
-
- if (bytes_read != length) {
- *err = file_error(fh, err_info);
- if (*err == 0)
- *err = WTAP_ERR_SHORT_READ;
- return FALSE;
- }
- return TRUE;
-}
+/*
+ * Editor modelines - http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */
git.samba.org / metze / wireshark / wip.git / blobdiff