forked from osmocom/wireshark
6db77b000f
Add a "record type" field to "struct wtap_pkthdr"; currently, it can be REC_TYPE_PACKET, for a record containing a packet, or REC_TYPE_FILE_TYPE_SPECIFIC, for records containing file-type-specific data. Modify code that reads packets to be able to handle non-packet records, even if that just means ignoring them. Rename some routines to indicate that they handle more than just packets. We don't yet have any libwiretap code that supplies records other than REC_TYPE_PACKET or that supporting writing records other than REC_TYPE_PACKET, or any code to support plugins for handling REC_TYPE_FILE_TYPE_SPECIFIC records; this is just the first step for bug 8590. Change-Id: Idb40b78f17c2c3aea72031bcd252abf9bc11c813 Reviewed-on: https://code.wireshark.org/review/1773 Reviewed-by: Guy Harris <guy@alum.mit.edu>
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/* hcidump.c
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*
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* Copyright (c) 2003 by Marcel Holtmann <marcel@holtmann.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include "buffer.h"
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#include "hcidump.h"
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struct dump_hdr {
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guint16 len;
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guint8 in;
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guint8 pad;
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guint32 ts_sec;
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guint32 ts_usec;
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};
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#define DUMP_HDR_SIZE (sizeof(struct dump_hdr))
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static gboolean hcidump_process_packet(FILE_T fh, struct wtap_pkthdr *phdr,
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Buffer *buf, int *err, gchar **err_info)
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{
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struct dump_hdr dh;
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int bytes_read, packet_size;
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bytes_read = file_read(&dh, DUMP_HDR_SIZE, fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(fh, err_info);
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if (*err == 0 && bytes_read != 0)
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*err = WTAP_ERR_SHORT_READ;
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return FALSE;
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}
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packet_size = GUINT16_FROM_LE(dh.len);
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if (packet_size > WTAP_MAX_PACKET_SIZE) {
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/*
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* Probably a corrupt capture file; don't blow up trying
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* to allocate space for an immensely-large packet.
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*/
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("hcidump: File has %u-byte packet, bigger than maximum of %u",
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packet_size, WTAP_MAX_PACKET_SIZE);
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return FALSE;
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}
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phdr->rec_type = REC_TYPE_PACKET;
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phdr->presence_flags = WTAP_HAS_TS;
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phdr->ts.secs = GUINT32_FROM_LE(dh.ts_sec);
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phdr->ts.nsecs = GUINT32_FROM_LE(dh.ts_usec) * 1000;
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phdr->caplen = packet_size;
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phdr->len = packet_size;
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phdr->pseudo_header.p2p.sent = (dh.in ? FALSE : TRUE);
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return wtap_read_packet_bytes(fh, buf, packet_size, err, err_info);
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}
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static gboolean hcidump_read(wtap *wth, int *err, gchar **err_info,
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gint64 *data_offset)
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{
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*data_offset = file_tell(wth->fh);
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return hcidump_process_packet(wth->fh, &wth->phdr, wth->frame_buffer,
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err, err_info);
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}
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static gboolean hcidump_seek_read(wtap *wth, gint64 seek_off,
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struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info)
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{
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if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
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return FALSE;
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return hcidump_process_packet(wth->random_fh, phdr, buf, err, err_info);
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}
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int hcidump_open(wtap *wth, int *err, gchar **err_info)
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{
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struct dump_hdr dh;
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guint8 type;
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int bytes_read;
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bytes_read = file_read(&dh, DUMP_HDR_SIZE, wth->fh);
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if (bytes_read != DUMP_HDR_SIZE) {
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*err = file_error(wth->fh, err_info);
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if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
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return -1;
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return 0;
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}
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if ((dh.in != 0 && dh.in != 1) || dh.pad != 0
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|| GUINT16_FROM_LE(dh.len) < 1)
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return 0;
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bytes_read = file_read(&type, 1, wth->fh);
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if (bytes_read != 1) {
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*err = file_error(wth->fh, err_info);
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if (*err != 0 && *err != WTAP_ERR_SHORT_READ)
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return -1;
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return 0;
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}
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if (type < 1 || type > 4)
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return 0;
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1)
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return -1;
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_HCIDUMP;
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wth->file_encap = WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR;
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wth->snapshot_length = 0;
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wth->subtype_read = hcidump_read;
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wth->subtype_seek_read = hcidump_seek_read;
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wth->tsprecision = WTAP_FILE_TSPREC_USEC;
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return 1;
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}
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