/* netmon.c
*
- * $Id: netmon.c,v 1.16 1999/10/05 07:06:06 guy Exp $
+ * $Id$
*
* Wiretap Library
- * Copyright (c) 1998 by Gilbert Ramirez <gram@verdict.uthscsa.edu>
- *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
*/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
-#include <time.h>
-#include "wtap.h"
-#include "file.h"
+#include <string.h>
+#include "wtap-int.h"
+#include "file_wrappers.h"
#include "buffer.h"
+#include "atm.h"
#include "netmon.h"
/* The file at
guint32 networkinfolength; /* length of network info structure */
};
-/* Network Monitor record header; not defined in STRUCT.H, but deduced by
+/* Network Monitor 1.x record header; not defined in STRUCT.H, but deduced by
* looking at capture files. */
struct netmonrec_1_x_hdr {
guint32 ts_delta; /* time stamp - msecs since start of capture */
guint16 incl_len; /* number of octets captured in file */
};
+/* Network Monitor 2.x record header; not defined in STRUCT.H, but deduced by
+ * looking at capture files. */
struct netmonrec_2_x_hdr {
guint32 ts_delta_lo; /* time stamp - usecs since start of capture */
guint32 ts_delta_hi; /* time stamp - usecs since start of capture */
guint32 incl_len; /* number of octets captured in file */
};
-static int netmon_read(wtap *wth, int *err);
+/*
+ * The link-layer header on ATM packets.
+ */
+struct netmon_atm_hdr {
+ guint8 dest[6]; /* "Destination address" - what is it? */
+ guint8 src[6]; /* "Source address" - what is it? */
+ guint16 vpi; /* VPI */
+ guint16 vci; /* VCI */
+};
-int netmon_open(wtap *wth, int *err)
+static gboolean netmon_read(wtap *wth, int *err, gchar **err_info,
+ gint64 *data_offset);
+static gboolean netmon_seek_read(wtap *wth, gint64 seek_off,
+ union wtap_pseudo_header *pseudo_header, guchar *pd, int length,
+ int *err, gchar **err_info);
+static gboolean netmon_read_atm_pseudoheader(FILE_T fh,
+ union wtap_pseudo_header *pseudo_header, int *err);
+static gboolean netmon_read_rec_data(FILE_T fh, guchar *pd, int length,
+ int *err);
+static void netmon_sequential_close(wtap *wth);
+static void netmon_close(wtap *wth);
+static gboolean netmon_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
+ const union wtap_pseudo_header *pseudo_header, const guchar *pd, int *err);
+static gboolean netmon_dump_close(wtap_dumper *wdh, int *err);
+
+int netmon_open(wtap *wth, int *err, gchar **err_info)
{
int bytes_read;
char magic[sizeof netmon_1_x_magic];
static const int netmon_encap[] = {
WTAP_ENCAP_UNKNOWN,
WTAP_ENCAP_ETHERNET,
- WTAP_ENCAP_TR,
+ WTAP_ENCAP_TOKEN_RING,
WTAP_ENCAP_FDDI_BITSWAPPED,
- WTAP_ENCAP_UNKNOWN, /* WAN */
- WTAP_ENCAP_UNKNOWN, /* LocalTalk */
- WTAP_ENCAP_UNKNOWN, /* "DIX" - should not occur */
- WTAP_ENCAP_UNKNOWN, /* ARCNET raw */
- WTAP_ENCAP_UNKNOWN, /* ARCNET 878.2 */
- WTAP_ENCAP_UNKNOWN, /* ATM */
- WTAP_ENCAP_UNKNOWN, /* Wireless WAN */
- WTAP_ENCAP_UNKNOWN /* IrDA */
+ WTAP_ENCAP_ATM_PDUS, /* NDIS WAN - this is what's used for ATM */
+ WTAP_ENCAP_UNKNOWN, /* NDIS LocalTalk */
+ WTAP_ENCAP_UNKNOWN, /* NDIS "DIX" - should not occur */
+ WTAP_ENCAP_UNKNOWN, /* NDIS ARCNET raw */
+ WTAP_ENCAP_UNKNOWN, /* NDIS ARCNET 878.2 */
+ WTAP_ENCAP_UNKNOWN, /* NDIS ATM (no, this is NOT used for ATM) */
+ WTAP_ENCAP_UNKNOWN, /* NDIS Wireless WAN */
+ WTAP_ENCAP_UNKNOWN /* NDIS IrDA */
};
#define NUM_NETMON_ENCAPS (sizeof netmon_encap / sizeof netmon_encap[0])
struct tm tm;
+ int frame_table_offset;
+ guint32 frame_table_length;
+ guint32 frame_table_size;
+ guint32 *frame_table;
+#ifdef WORDS_BIGENDIAN
+ unsigned int i;
+#endif
/* Read in the string that should be at the start of a Network
* Monitor file */
- file_seek(wth->fh, 0, SEEK_SET);
errno = WTAP_ERR_CANT_READ;
bytes_read = file_read(magic, 1, sizeof magic, wth->fh);
if (bytes_read != sizeof magic) {
break;
default:
- g_message("netmon: major version %u unsupported", hdr.ver_major);
*err = WTAP_ERR_UNSUPPORTED;
+ *err_info = g_strdup_printf("netmon: major version %u unsupported", hdr.ver_major);
return -1;
}
hdr.network = pletohs(&hdr.network);
if (hdr.network >= NUM_NETMON_ENCAPS
|| netmon_encap[hdr.network] == WTAP_ENCAP_UNKNOWN) {
- g_message("netmon: network type %u unknown or unsupported",
+ *err = WTAP_ERR_UNSUPPORTED_ENCAP;
+ *err_info = g_strdup_printf("netmon: network type %u unknown or unsupported",
hdr.network);
- *err = WTAP_ERR_UNSUPPORTED;
return -1;
}
wth->file_type = file_type;
wth->capture.netmon = g_malloc(sizeof(netmon_t));
wth->subtype_read = netmon_read;
+ wth->subtype_seek_read = netmon_seek_read;
+ wth->subtype_sequential_close = netmon_sequential_close;
+ wth->subtype_close = netmon_close;
wth->file_encap = netmon_encap[hdr.network];
- wth->snapshot_length = 16384; /* XXX - not available in header */
+ wth->snapshot_length = 0; /* not available in header */
/*
* Convert the time stamp to a "time_t" and a number of
* milliseconds.
wth->capture.netmon->version_major = hdr.ver_major;
/*
- * The "frame index table" appears to come after the last
- * packet; remember its offset, so we know when we have no
- * more packets to read.
+ * Get the offset of the frame index table.
+ */
+ frame_table_offset = pletohl(&hdr.frametableoffset);
+
+ /*
+ * It appears that some NetMon 2.x files don't have the
+ * first packet starting exactly 128 bytes into the file.
+ *
+ * Furthermore, it also appears that there are "holes" in
+ * the file, i.e. frame N+1 doesn't always follow immediately
+ * after frame N.
+ *
+ * Therefore, we must read the frame table, and use the offsets
+ * in it as the offsets of the frames.
+ */
+ frame_table_length = pletohl(&hdr.frametablelength);
+ frame_table_size = frame_table_length / sizeof (guint32);
+ if ((frame_table_size * sizeof (guint32)) != frame_table_length) {
+ *err = WTAP_ERR_UNSUPPORTED;
+ *err_info = g_strdup_printf("netmon: frame table length is %u, which is not a multiple of the size of an entry",
+ frame_table_length);
+ g_free(wth->capture.netmon);
+ return -1;
+ }
+ if (frame_table_size == 0) {
+ *err = WTAP_ERR_UNSUPPORTED;
+ *err_info = g_strdup_printf("netmon: frame table length is %u, which means it's less than one entry in size",
+ frame_table_length);
+ g_free(wth->capture.netmon);
+ return -1;
+ }
+ if (file_seek(wth->fh, frame_table_offset, SEEK_SET, err) == -1) {
+ g_free(wth->capture.netmon);
+ return -1;
+ }
+ frame_table = g_malloc(frame_table_length);
+ errno = WTAP_ERR_CANT_READ;
+ bytes_read = file_read(frame_table, 1, frame_table_length, wth->fh);
+ if ((guint32)bytes_read != frame_table_length) {
+ *err = file_error(wth->fh);
+ if (*err == 0)
+ *err = WTAP_ERR_SHORT_READ;
+ g_free(frame_table);
+ g_free(wth->capture.netmon);
+ return -1;
+ }
+ wth->capture.netmon->frame_table_size = frame_table_size;
+ wth->capture.netmon->frame_table = frame_table;
+
+#ifdef WORDS_BIGENDIAN
+ /*
+ * OK, now byte-swap the frame table.
*/
- wth->capture.netmon->end_offset = pletohl(&hdr.frametableoffset);
+ for (i = 0; i < frame_table_size; i++)
+ frame_table[i] = pletohl(&frame_table[i]);
+#endif
- /* Seek to the beginning of the data records. */
- file_seek(wth->fh, CAPTUREFILE_HEADER_SIZE, SEEK_SET);
- wth->data_offset = CAPTUREFILE_HEADER_SIZE;
+ /* Set up to start reading at the first frame. */
+ wth->capture.netmon->current_frame = 0;
+ wth->tsprecision = WTAP_FILE_TSPREC_USEC;
return 1;
}
/* Read the next packet */
-static int netmon_read(wtap *wth, int *err)
+static gboolean netmon_read(wtap *wth, int *err, gchar **err_info,
+ gint64 *data_offset)
{
+ netmon_t *netmon = wth->capture.netmon;
guint32 packet_size = 0;
+ guint32 orig_size = 0;
int bytes_read;
union {
struct netmonrec_1_x_hdr hdr_1_x;
struct netmonrec_2_x_hdr hdr_2_x;
} hdr;
int hdr_size = 0;
- int data_offset;
+ int rec_offset;
+ guint8 *data_ptr;
time_t secs;
guint32 usecs;
double t;
/* Have we reached the end of the packet data? */
- if (wth->data_offset >= wth->capture.netmon->end_offset) {
- /* Yes. */
- return 0;
+ if (netmon->current_frame >= netmon->frame_table_size) {
+ /* Yes. We won't need the frame table any more;
+ free it. */
+ g_free(wth->capture.netmon->frame_table);
+ wth->capture.netmon->frame_table = NULL;
+ *err = 0; /* it's just an EOF, not an error */
+ return FALSE;
}
+
+ /* Seek to the beginning of the current record, if we're
+ not there already (seeking to the current position
+ may still cause a seek and a read of the underlying file,
+ so we don't want to do it unconditionally). */
+ rec_offset = netmon->frame_table[netmon->current_frame];
+ if (wth->data_offset != rec_offset) {
+ wth->data_offset = rec_offset;
+ if (file_seek(wth->fh, wth->data_offset, SEEK_SET, err) == -1)
+ return FALSE;
+ }
+ netmon->current_frame++;
+
/* Read record header. */
- switch (wth->capture.netmon->version_major) {
+ switch (netmon->version_major) {
case 1:
hdr_size = sizeof (struct netmonrec_1_x_hdr);
break;
}
errno = WTAP_ERR_CANT_READ;
+
bytes_read = file_read(&hdr, 1, hdr_size, wth->fh);
if (bytes_read != hdr_size) {
*err = file_error(wth->fh);
- if (*err != 0)
- return -1;
- if (bytes_read != 0) {
+ if (*err == 0 && bytes_read != 0) {
*err = WTAP_ERR_SHORT_READ;
- return -1;
}
- return 0;
+ return FALSE;
}
wth->data_offset += hdr_size;
- switch (wth->capture.netmon->version_major) {
+ switch (netmon->version_major) {
case 1:
+ orig_size = pletohs(&hdr.hdr_1_x.orig_len);
packet_size = pletohs(&hdr.hdr_1_x.incl_len);
break;
case 2:
+ orig_size = pletohl(&hdr.hdr_2_x.orig_len);
packet_size = pletohl(&hdr.hdr_2_x.incl_len);
break;
}
* Probably a corrupt capture file; don't blow up trying
* to allocate space for an immensely-large packet.
*/
- g_message("netmon: File has %u-byte packet, bigger than maximum of %u",
- packet_size, WTAP_MAX_PACKET_SIZE);
*err = WTAP_ERR_BAD_RECORD;
- return -1;
+ *err_info = g_strdup_printf("netmon: File has %u-byte packet, bigger than maximum of %u",
+ packet_size, WTAP_MAX_PACKET_SIZE);
+ return FALSE;
}
- buffer_assure_space(wth->frame_buffer, packet_size);
- data_offset = wth->data_offset;
- errno = WTAP_ERR_CANT_READ;
- bytes_read = file_read(buffer_start_ptr(wth->frame_buffer), 1,
- packet_size, wth->fh);
- if (bytes_read != packet_size) {
- *err = file_error(wth->fh);
- if (*err == 0)
- *err = WTAP_ERR_SHORT_READ;
- return -1;
+ *data_offset = wth->data_offset;
+
+ /*
+ * If this is an ATM packet, the first
+ * "sizeof (struct netmon_atm_hdr)" bytes have destination and
+ * source addresses (6 bytes - MAC addresses of some sort?)
+ * and the VPI and VCI; read them and generate the pseudo-header
+ * from them.
+ */
+ switch (wth->file_encap) {
+
+ case WTAP_ENCAP_ATM_PDUS:
+ if (packet_size < sizeof (struct netmon_atm_hdr)) {
+ /*
+ * Uh-oh, the packet isn't big enough to even
+ * have a pseudo-header.
+ */
+ *err = WTAP_ERR_BAD_RECORD;
+ *err_info = g_strdup_printf("netmon: ATM file has a %u-byte packet, too small to have even an ATM pseudo-header\n",
+ packet_size);
+ return FALSE;
+ }
+ if (!netmon_read_atm_pseudoheader(wth->fh, &wth->pseudo_header,
+ err))
+ return FALSE; /* Read error */
+
+ /*
+ * Don't count the pseudo-header as part of the packet.
+ */
+ orig_size -= sizeof (struct netmon_atm_hdr);
+ packet_size -= sizeof (struct netmon_atm_hdr);
+ wth->data_offset += sizeof (struct netmon_atm_hdr);
+ break;
+
+ case WTAP_ENCAP_ETHERNET:
+ /*
+ * We assume there's no FCS in this frame.
+ */
+ wth->pseudo_header.eth.fcs_len = 0;
+ break;
}
+
+ buffer_assure_space(wth->frame_buffer, packet_size);
+ data_ptr = buffer_start_ptr(wth->frame_buffer);
+ if (!netmon_read_rec_data(wth->fh, data_ptr, packet_size, err))
+ return FALSE; /* Read error */
wth->data_offset += packet_size;
- t = (double)wth->capture.netmon->start_usecs;
- switch (wth->capture.netmon->version_major) {
+ t = (double)netmon->start_usecs;
+ switch (netmon->version_major) {
case 1:
t += ((double)pletohl(&hdr.hdr_1_x.ts_delta))*1000;
break;
}
secs = (time_t)(t/1000000);
- usecs = (guint32)(t - secs*1000000);
- wth->phdr.ts.tv_sec = wth->capture.netmon->start_secs + secs;
- wth->phdr.ts.tv_usec = usecs;
+ usecs = (guint32)(t - (double)secs*1000000);
+ wth->phdr.ts.secs = netmon->start_secs + secs;
+ wth->phdr.ts.nsecs = usecs * 1000;
wth->phdr.caplen = packet_size;
- switch (wth->capture.netmon->version_major) {
+ wth->phdr.len = orig_size;
- case 1:
- wth->phdr.len = pletohs(&hdr.hdr_1_x.orig_len);
+ /*
+ * Attempt to guess from the packet data, the VPI, and the VCI
+ * information about the type of traffic.
+ */
+ if (wth->file_encap == WTAP_ENCAP_ATM_PDUS) {
+ atm_guess_traffic_type(data_ptr, packet_size,
+ &wth->pseudo_header);
+ }
+
+ return TRUE;
+}
+
+static gboolean
+netmon_seek_read(wtap *wth, gint64 seek_off,
+ union wtap_pseudo_header *pseudo_header, guchar *pd, int length,
+ int *err, gchar **err_info _U_)
+{
+ if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
+ return FALSE;
+
+ switch (wth->file_encap) {
+
+ case WTAP_ENCAP_ATM_PDUS:
+ if (!netmon_read_atm_pseudoheader(wth->random_fh, pseudo_header,
+ err)) {
+ /* Read error */
+ return FALSE;
+ }
break;
- case 2:
- wth->phdr.len = pletohl(&hdr.hdr_2_x.orig_len);
+ case WTAP_ENCAP_ETHERNET:
+ /*
+ * We assume there's no FCS in this frame.
+ */
+ pseudo_header->eth.fcs_len = 0;
+ break;
+ }
+
+ /*
+ * Read the packet data.
+ */
+ if (!netmon_read_rec_data(wth->random_fh, pd, length, err))
+ return FALSE;
+
+ /*
+ * Attempt to guess from the packet data, the VPI, and the VCI
+ * information about the type of traffic.
+ */
+ if (wth->file_encap == WTAP_ENCAP_ATM_PDUS)
+ atm_guess_traffic_type(pd, length, pseudo_header);
+
+ return TRUE;
+}
+
+static gboolean
+netmon_read_atm_pseudoheader(FILE_T fh, union wtap_pseudo_header *pseudo_header,
+ int *err)
+{
+ struct netmon_atm_hdr atm_phdr;
+ int bytes_read;
+ guint16 vpi, vci;
+
+ errno = WTAP_ERR_CANT_READ;
+ bytes_read = file_read(&atm_phdr, 1, sizeof (struct netmon_atm_hdr), fh);
+ if (bytes_read != sizeof (struct netmon_atm_hdr)) {
+ *err = file_error(fh);
+ if (*err == 0)
+ *err = WTAP_ERR_SHORT_READ;
+ return FALSE;
+ }
+
+ vpi = g_ntohs(atm_phdr.vpi);
+ vci = g_ntohs(atm_phdr.vci);
+
+ pseudo_header->atm.vpi = vpi;
+ pseudo_header->atm.vci = vci;
+
+ /* We don't have this information */
+ pseudo_header->atm.flags = 0;
+ pseudo_header->atm.channel = 0;
+ pseudo_header->atm.cells = 0;
+ pseudo_header->atm.aal5t_u2u = 0;
+ pseudo_header->atm.aal5t_len = 0;
+ pseudo_header->atm.aal5t_chksum = 0;
+
+ return TRUE;
+}
+
+static gboolean
+netmon_read_rec_data(FILE_T fh, guchar *pd, int length, int *err)
+{
+ int bytes_read;
+
+ errno = WTAP_ERR_CANT_READ;
+ bytes_read = file_read(pd, 1, length, fh);
+
+ if (bytes_read != length) {
+ *err = file_error(fh);
+ if (*err == 0)
+ *err = WTAP_ERR_SHORT_READ;
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/* Throw away the frame table used by the sequential I/O stream. */
+static void
+netmon_sequential_close(wtap *wth)
+{
+ if (wth->capture.netmon->frame_table != NULL) {
+ g_free(wth->capture.netmon->frame_table);
+ wth->capture.netmon->frame_table = NULL;
+ }
+}
+
+/* Close stuff used by the random I/O stream, if any, and free up any
+ private data structures. (If there's a "sequential_close" routine
+ for a capture file type, it'll be called before the "close" routine
+ is called, so we don't have to free the frame table here.) */
+static void
+netmon_close(wtap *wth)
+{
+ g_free(wth->capture.netmon);
+}
+
+static const int wtap_encap[] = {
+ -1, /* WTAP_ENCAP_UNKNOWN -> unsupported */
+ 1, /* WTAP_ENCAP_ETHERNET -> NDIS Ethernet */
+ 2, /* WTAP_ENCAP_TOKEN_RING -> NDIS Token Ring */
+ -1, /* WTAP_ENCAP_SLIP -> unsupported */
+ -1, /* WTAP_ENCAP_PPP -> unsupported */
+ 3, /* WTAP_ENCAP_FDDI -> NDIS FDDI */
+ 3, /* WTAP_ENCAP_FDDI_BITSWAPPED -> NDIS FDDI */
+ -1, /* WTAP_ENCAP_RAW_IP -> unsupported */
+ -1, /* WTAP_ENCAP_ARCNET -> unsupported */
+ -1, /* WTAP_ENCAP_ATM_RFC1483 -> unsupported */
+ -1, /* WTAP_ENCAP_LINUX_ATM_CLIP -> unsupported */
+ -1, /* WTAP_ENCAP_LAPB -> unsupported*/
+ 4, /* WTAP_ENCAP_ATM_PDUS -> NDIS WAN (*NOT* ATM!) */
+ -1 /* WTAP_ENCAP_NULL -> unsupported */
+};
+#define NUM_WTAP_ENCAPS (sizeof wtap_encap / sizeof wtap_encap[0])
+
+/* Returns 0 if we could write the specified encapsulation type,
+ an error indication otherwise. */
+int netmon_dump_can_write_encap(int encap)
+{
+ /* Per-packet encapsulations aren't supported. */
+ if (encap == WTAP_ENCAP_PER_PACKET)
+ return WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED;
+
+ if (encap < 0 || (unsigned) encap >= NUM_WTAP_ENCAPS || wtap_encap[encap] == -1)
+ return WTAP_ERR_UNSUPPORTED_ENCAP;
+
+ return 0;
+}
+
+/* Returns TRUE on success, FALSE on failure; sets "*err" to an error code on
+ failure */
+gboolean netmon_dump_open(wtap_dumper *wdh, gboolean cant_seek, int *err)
+{
+ /* This is a NetMon file. We can't fill in some fields in the
+ header until all the packets have been written, so we can't
+ write to a pipe. */
+ if (cant_seek) {
+ *err = WTAP_ERR_CANT_WRITE_TO_PIPE;
+ return FALSE;
+ }
+
+ /* We can't fill in all the fields in the file header, as we
+ haven't yet written any packets. As we'll have to rewrite
+ the header when we've written out all the packets, we just
+ skip over the header for now. */
+ if (fseek(wdh->fh, CAPTUREFILE_HEADER_SIZE, SEEK_SET) == -1) {
+ *err = errno;
+ return FALSE;
+ }
+
+ wdh->subtype_write = netmon_dump;
+ wdh->subtype_close = netmon_dump_close;
+
+ wdh->dump.netmon = g_malloc(sizeof(netmon_dump_t));
+ wdh->dump.netmon->frame_table_offset = CAPTUREFILE_HEADER_SIZE;
+ wdh->dump.netmon->got_first_record_time = FALSE;
+ wdh->dump.netmon->frame_table = NULL;
+ wdh->dump.netmon->frame_table_index = 0;
+ wdh->dump.netmon->frame_table_size = 0;
+
+ return TRUE;
+}
+
+/* Write a record for a packet to a dump file.
+ Returns TRUE on success, FALSE on failure. */
+static gboolean netmon_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
+ const union wtap_pseudo_header *pseudo_header, const guchar *pd, int *err)
+{
+ netmon_dump_t *netmon = wdh->dump.netmon;
+ struct netmonrec_1_x_hdr rec_1_x_hdr;
+ struct netmonrec_2_x_hdr rec_2_x_hdr;
+ char *hdrp;
+ size_t hdr_size;
+ size_t nwritten;
+ double t;
+ guint32 time_low, time_high;
+ struct netmon_atm_hdr atm_hdr;
+ int atm_hdrsize;
+
+ /* NetMon files have a capture start time in the file header,
+ and have times relative to that in the packet headers;
+ pick the time of the first packet as the capture start
+ time. */
+ if (!netmon->got_first_record_time) {
+ netmon->first_record_time = phdr->ts;
+ netmon->got_first_record_time = TRUE;
+ }
+
+ if (wdh->encap == WTAP_ENCAP_ATM_PDUS)
+ atm_hdrsize = sizeof (struct netmon_atm_hdr);
+ else
+ atm_hdrsize = 0;
+ switch (wdh->file_type) {
+
+ case WTAP_FILE_NETMON_1_x:
+ rec_1_x_hdr.ts_delta = htolel(
+ (phdr->ts.secs - netmon->first_record_time.secs)*1000
+ + (phdr->ts.nsecs - netmon->first_record_time.nsecs + 500000)/1000000);
+ rec_1_x_hdr.orig_len = htoles(phdr->len + atm_hdrsize);
+ rec_1_x_hdr.incl_len = htoles(phdr->caplen + atm_hdrsize);
+ hdrp = (char *)&rec_1_x_hdr;
+ hdr_size = sizeof rec_1_x_hdr;
+ break;
+
+ case WTAP_FILE_NETMON_2_x:
+ /*
+ * Unfortunately, not all the platforms on which we run
+ * support 64-bit integral types, even though most do
+ * (even on 32-bit processors), so we do it in floating
+ * point.
+ */
+ t = (phdr->ts.secs - netmon->first_record_time.secs)*1000000.0
+ + (phdr->ts.nsecs - netmon->first_record_time.nsecs) / 1000;
+ time_high = (guint32) (t/4294967296.0);
+ time_low = (guint32) (t - (time_high*4294967296.0));
+ rec_2_x_hdr.ts_delta_lo = htolel(time_low);
+ rec_2_x_hdr.ts_delta_hi = htolel(time_high);
+ rec_2_x_hdr.orig_len = htolel(phdr->len + atm_hdrsize);
+ rec_2_x_hdr.incl_len = htolel(phdr->caplen + atm_hdrsize);
+ hdrp = (char *)&rec_2_x_hdr;
+ hdr_size = sizeof rec_2_x_hdr;
+ break;
+
+ default:
+ /* We should never get here - our open routine
+ should only get called for the types above. */
+ *err = WTAP_ERR_UNSUPPORTED_FILE_TYPE;
+ return FALSE;
+ }
+
+ nwritten = fwrite(hdrp, 1, hdr_size, wdh->fh);
+ if (nwritten != hdr_size) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ return FALSE;
+ }
+
+ if (wdh->encap == WTAP_ENCAP_ATM_PDUS) {
+ /*
+ * Write the ATM header.
+ * We supply all-zero destination and source addresses.
+ */
+ memset(&atm_hdr.dest, 0, sizeof atm_hdr.dest);
+ memset(&atm_hdr.src, 0, sizeof atm_hdr.src);
+ atm_hdr.vpi = g_htons(pseudo_header->atm.vpi);
+ atm_hdr.vci = g_htons(pseudo_header->atm.vci);
+ nwritten = fwrite(&atm_hdr, 1, sizeof atm_hdr, wdh->fh);
+ if (nwritten != sizeof atm_hdr) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ return FALSE;
+ }
+ }
+
+ nwritten = fwrite(pd, 1, phdr->caplen, wdh->fh);
+ if (nwritten != phdr->caplen) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ return FALSE;
+ }
+
+ /*
+ * Stash the file offset of this frame.
+ */
+ if (netmon->frame_table_size == 0) {
+ /*
+ * Haven't yet allocated the buffer for the frame table.
+ */
+ netmon->frame_table = g_malloc(1024 * sizeof *netmon->frame_table);
+ netmon->frame_table_size = 1024;
+ } else {
+ /*
+ * We've allocated it; are we at the end?
+ */
+ if (netmon->frame_table_index >= netmon->frame_table_size) {
+ /*
+ * Yes - double the size of the frame table.
+ */
+ netmon->frame_table_size *= 2;
+ netmon->frame_table = g_realloc(netmon->frame_table,
+ netmon->frame_table_size * sizeof *netmon->frame_table);
+ }
+ }
+ netmon->frame_table[netmon->frame_table_index] =
+ htolel(netmon->frame_table_offset);
+ netmon->frame_table_index++;
+ netmon->frame_table_offset += hdr_size + phdr->caplen + atm_hdrsize;
+
+ return TRUE;
+}
+
+/* Finish writing to a dump file.
+ Returns TRUE on success, FALSE on failure. */
+static gboolean netmon_dump_close(wtap_dumper *wdh, int *err)
+{
+ netmon_dump_t *netmon = wdh->dump.netmon;
+ size_t n_to_write;
+ size_t nwritten;
+ struct netmon_hdr file_hdr;
+ const char *magicp;
+ size_t magic_size;
+ struct tm *tm;
+
+ /* Write out the frame table. "netmon->frame_table_index" is
+ the number of entries we've put into it. */
+ n_to_write = netmon->frame_table_index * sizeof *netmon->frame_table;
+ nwritten = fwrite(netmon->frame_table, 1, n_to_write, wdh->fh);
+ if (nwritten != n_to_write) {
+ if (err != NULL) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ }
+ return FALSE;
+ }
+
+ /* Now go fix up the file header. */
+ fseek(wdh->fh, 0, SEEK_SET);
+ memset(&file_hdr, '\0', sizeof file_hdr);
+ switch (wdh->file_type) {
+
+ case WTAP_FILE_NETMON_1_x:
+ magicp = netmon_1_x_magic;
+ magic_size = sizeof netmon_1_x_magic;
+ /* NetMon file version, for 1.x, is 1.1 */
+ file_hdr.ver_major = 1;
+ file_hdr.ver_minor = 1;
break;
+
+ case WTAP_FILE_NETMON_2_x:
+ magicp = netmon_2_x_magic;
+ magic_size = sizeof netmon_2_x_magic;
+ /*
+ * NetMon file version, for 2.x, is 2.0;
+ * for 3.0, it's 2.1.
+ */
+ file_hdr.ver_major = 2;
+ file_hdr.ver_minor = 0;
+ break;
+
+ default:
+ /* We should never get here - our open routine
+ should only get called for the types above. */
+ if (err != NULL)
+ *err = WTAP_ERR_UNSUPPORTED_FILE_TYPE;
+ return FALSE;
+ }
+ nwritten = fwrite(magicp, 1, magic_size, wdh->fh);
+ if (nwritten != magic_size) {
+ if (err != NULL) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ }
+ return FALSE;
+ }
+
+ file_hdr.network = htoles(wtap_encap[wdh->encap]);
+ tm = localtime(&netmon->first_record_time.secs);
+ if (tm != NULL) {
+ file_hdr.ts_year = htoles(1900 + tm->tm_year);
+ file_hdr.ts_month = htoles(tm->tm_mon + 1);
+ file_hdr.ts_dow = htoles(tm->tm_wday);
+ file_hdr.ts_day = htoles(tm->tm_mday);
+ file_hdr.ts_hour = htoles(tm->tm_hour);
+ file_hdr.ts_min = htoles(tm->tm_min);
+ file_hdr.ts_sec = htoles(tm->tm_sec);
+ } else {
+ file_hdr.ts_year = htoles(1900 + 0);
+ file_hdr.ts_month = htoles(0 + 1);
+ file_hdr.ts_dow = htoles(0);
+ file_hdr.ts_day = htoles(0);
+ file_hdr.ts_hour = htoles(0);
+ file_hdr.ts_min = htoles(0);
+ file_hdr.ts_sec = htoles(0);
+ }
+ file_hdr.ts_msec = htoles(netmon->first_record_time.nsecs/1000000);
+ /* XXX - what about rounding? */
+ file_hdr.frametableoffset = htolel(netmon->frame_table_offset);
+ file_hdr.frametablelength =
+ htolel(netmon->frame_table_index * sizeof *netmon->frame_table);
+ nwritten = fwrite(&file_hdr, 1, sizeof file_hdr, wdh->fh);
+ if (nwritten != sizeof file_hdr) {
+ if (err != NULL) {
+ if (nwritten == 0 && ferror(wdh->fh))
+ *err = errno;
+ else
+ *err = WTAP_ERR_SHORT_WRITE;
+ }
+ return FALSE;
}
- wth->phdr.pkt_encap = wth->file_encap;
- return data_offset;
+ return TRUE;
}
git.samba.org / obnox / wireshark / wip.git / blobdiff