--- /dev/null
+/* stanag4607.c
+ *
+ * STANAG 4607 file reading
+ *
+ * $Id$
+ *
+ * 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.
+ */
+
+#include "config.h"
+
+#include <arpa/inet.h>
+#include <errno.h>
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#include "wtap-int.h"
+#include "file_wrappers.h"
+#include "buffer.h"
+#include "stanag4607.h"
+
+static gboolean is_valid_id(guint16 version_id)
+{
+#define VERSION_21 0x3231
+#define VERSION_30 0x3330
+ if ((version_id != VERSION_21) &&
+ (version_id != VERSION_30))
+ /* Not a stanag4607 file */
+ return FALSE;
+ return TRUE;
+}
+
+static gboolean stanag4607_read_file(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
+ Buffer *buf, int *err, gchar **err_info)
+{
+ static gint64 base_secs = 0;
+ guint32 millisecs, secs, nsecs;
+ gint64 offset = 0;
+ guint8 stanag_pkt_hdr[37];
+ int bytes_read;
+ guint32 packet_size;
+
+ *err = 0;
+
+ /* Combined packet header and segment header */
+ bytes_read = file_read(stanag_pkt_hdr, sizeof stanag_pkt_hdr, fh);
+ if (bytes_read != sizeof stanag_pkt_hdr)
+ goto fail;
+ offset += bytes_read;
+
+ if (!is_valid_id(pntohs(&stanag_pkt_hdr[0]))) {
+ *err = WTAP_ERR_BAD_FILE;
+ *err_info = g_strdup("Bad version number");
+ return FALSE;
+ }
+
+ /* The next 4 bytes are the packet length */
+ packet_size = pntohl(&stanag_pkt_hdr[2]);
+ phdr->caplen = packet_size;
+ phdr->len = packet_size;
+
+ /* Sadly, the header doesn't contain times; but some segments do */
+ /* So, get the segment header, which is just past tthe 32-byte header. */
+ phdr->presence_flags = WTAP_HAS_TS;
+
+ /* If no time specified, its the last baseline time */
+ phdr->ts.secs = base_secs;
+ phdr->ts.nsecs = 0;
+ millisecs = 0;
+
+#define MISSION_SEGMENT 1
+#define DWELL_SEGMENT 2
+#define JOB_DEFINITION_SEGMENT 5
+#define PLATFORM_LOCATION_SEGMENT 13
+ if (MISSION_SEGMENT == stanag_pkt_hdr[32]) {
+ guint8 mseg[39];
+ struct tm tm;
+
+ bytes_read = file_read(&mseg, sizeof mseg, fh);
+ if (bytes_read != sizeof mseg)
+ goto fail;
+ offset += bytes_read;
+
+ tm.tm_year = pntohs(&mseg[35]) - 1900;
+ tm.tm_mon = mseg[37] - 1;
+ tm.tm_mday = mseg[38];
+ tm.tm_hour = 0;
+ tm.tm_min = 0;
+ tm.tm_sec = 0;
+ tm.tm_isdst = -1;
+ base_secs = mktime(&tm);
+ phdr->ts.secs = base_secs;
+ }
+ else if (PLATFORM_LOCATION_SEGMENT == stanag_pkt_hdr[32]) {
+ bytes_read = file_read(&millisecs, sizeof millisecs, fh);
+ if (bytes_read != sizeof millisecs)
+ goto fail;
+ offset += bytes_read;
+ millisecs = ntohl(millisecs);
+ }
+ else if (DWELL_SEGMENT == stanag_pkt_hdr[32]) {
+ guint8 dseg[19];
+ bytes_read = file_read(&dseg, sizeof dseg, fh);
+ if (bytes_read != sizeof dseg)
+ goto fail;
+ offset += bytes_read;
+ millisecs = pntohl(&dseg[15]);
+ }
+ if (0 != millisecs) {
+ secs = millisecs/1000;
+ nsecs = (millisecs - 1000 * secs) * 1000000;
+ phdr->ts.secs = base_secs + secs;
+ phdr->ts.nsecs = nsecs;
+ }
+
+ /* wind back to the start of the packet ... */
+ if (file_seek(fh, - offset, SEEK_CUR, err) == -1)
+ goto fail;
+
+ return wtap_read_packet_bytes(fh, buf, packet_size, err, err_info);
+
+fail:
+ *err = file_error(wth->fh, err_info);
+ return FALSE;
+}
+
+static gboolean stanag4607_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
+{
+ gint64 offset;
+
+ *err = 0;
+
+ offset = file_tell(wth->fh);
+
+ *data_offset = offset;
+
+ return stanag4607_read_file(wth, wth->fh, &wth->phdr, wth->frame_buffer, err, err_info);
+}
+
+static gboolean stanag4607_seek_read(wtap *wth, gint64 seek_off,
+ struct wtap_pkthdr *phdr,
+ Buffer *buf, int length _U_, int *err, gchar **err_info)
+{
+ if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
+ return FALSE;
+
+ return stanag4607_read_file(wth, wth->random_fh, phdr, buf, err, err_info);
+}
+
+int stanag4607_open(wtap *wth, int *err, gchar **err_info)
+{
+ int bytes_read;
+ guint16 version_id;
+
+ bytes_read = file_read(&version_id, sizeof version_id, wth->fh);
+ if (bytes_read != sizeof version_id) {
+ *err = file_error(wth->fh, err_info);
+ return (*err != 0) ? -1 : 0;
+ }
+
+ if (!is_valid_id(GUINT16_TO_BE(version_id)))
+ /* Not a stanag4607 file */
+ return 0;
+
+ /* seek back to the start of the file */
+ if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
+ return -1;
+
+ wth->file_type = WTAP_FILE_STANAG_4607;
+ wth->file_encap = WTAP_ENCAP_STANAG_4607;
+ wth->snapshot_length = 0; /* not known */
+
+ wth->subtype_read = stanag4607_read;
+ wth->subtype_seek_read = stanag4607_seek_read;
+ wth->tsprecision = WTAP_FILE_TSPREC_MSEC;
+
+ return 1;
+}
--- /dev/null
+/* stanag4607.h
+ *
+ * STANAG 4607 file reading
+ *
+ * $Id$
+ *
+ * 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.
+ *
+ */
+
+#ifndef __STANAG_4607_H__
+#define __STANAG_4607_H__
+
+#include <glib.h>
+#include <wiretap/wtap.h>
+#include "ws_symbol_export.h"
+
+int stanag4607_open(wtap *wth, int *err, gchar **err_info);
+
+#endif
git.samba.org / metze / wireshark / wip.git / commitdiff