![Guy Harris](/assets/img/avatar_default.png)
While we're at it, rename a variable to avoid colliding with the read() routine. Change-Id: I6629ec761f48751f34a2e7d04180d7583ad85710 Reviewed-on: https://code.wireshark.org/review/11626 Reviewed-by: Guy Harris <guy@alum.mit.edu>
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/* json.c
|
|
*
|
|
* Copyright 2015, Dario Lombardo <lomato@gmail.com>
|
|
*
|
|
* 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 <string.h>
|
|
|
|
#include "wtap-int.h"
|
|
#include "file_wrappers.h"
|
|
|
|
#include <json.h>
|
|
#include <wsutil/jsmn.h>
|
|
|
|
static gboolean json_read_file(wtap *wth, FILE_T fh, struct wtap_pkthdr *phdr,
|
|
Buffer *buf, int *err, gchar **err_info)
|
|
{
|
|
gint64 file_size;
|
|
int packet_size;
|
|
|
|
if ((file_size = wtap_file_size(wth, err)) == -1)
|
|
return FALSE;
|
|
|
|
if (file_size > MAX_FILE_SIZE) {
|
|
/*
|
|
* Don't blow up trying to allocate space for an
|
|
* immensely-large file.
|
|
*/
|
|
*err = WTAP_ERR_BAD_FILE;
|
|
*err_info = g_strdup_printf("mime_file: File has %" G_GINT64_MODIFIER "d-byte packet, bigger than maximum of %u",
|
|
file_size, MAX_FILE_SIZE);
|
|
return FALSE;
|
|
}
|
|
packet_size = (int)file_size;
|
|
|
|
phdr->rec_type = REC_TYPE_PACKET;
|
|
phdr->presence_flags = 0; /* yes, we have no bananas^Wtime stamp */
|
|
|
|
phdr->caplen = packet_size;
|
|
phdr->len = packet_size;
|
|
|
|
phdr->ts.secs = 0;
|
|
phdr->ts.nsecs = 0;
|
|
|
|
return wtap_read_packet_bytes(fh, buf, packet_size, err, err_info);
|
|
}
|
|
|
|
static gboolean json_seek_read(wtap *wth, gint64 seek_off, struct wtap_pkthdr *phdr, Buffer *buf,
|
|
int *err, gchar **err_info)
|
|
{
|
|
/* there is only one packet */
|
|
if (seek_off > 0) {
|
|
*err = 0;
|
|
return FALSE;
|
|
}
|
|
|
|
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
|
|
return FALSE;
|
|
|
|
return json_read_file(wth, wth->random_fh, phdr, buf, err, err_info);
|
|
}
|
|
|
|
static gboolean json_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
|
|
{
|
|
gint64 offset;
|
|
|
|
*err = 0;
|
|
|
|
offset = file_tell(wth->fh);
|
|
|
|
/* there is only ever one packet */
|
|
if (offset != 0)
|
|
return FALSE;
|
|
|
|
*data_offset = offset;
|
|
|
|
return json_read_file(wth, wth->fh, &wth->phdr, wth->frame_buffer, err, err_info);
|
|
}
|
|
|
|
wtap_open_return_val json_open(wtap *wth, int *err, gchar **err_info)
|
|
{
|
|
guint8* filebuf;
|
|
int bytes_read;
|
|
|
|
filebuf = (guint8*)g_malloc0(MAX_FILE_SIZE);
|
|
if (!filebuf)
|
|
return WTAP_OPEN_ERROR;
|
|
|
|
bytes_read = file_read(filebuf, MAX_FILE_SIZE, wth->fh);
|
|
if (bytes_read < 0) {
|
|
/* Read error. */
|
|
*err = file_error(wth->fh, err_info);
|
|
g_free(filebuf);
|
|
return WTAP_OPEN_ERROR;
|
|
}
|
|
if (bytes_read == 0) {
|
|
/* empty file, not *anybody's* */
|
|
g_free(filebuf);
|
|
return WTAP_OPEN_NOT_MINE;
|
|
}
|
|
|
|
if (jsmn_is_json(filebuf, bytes_read) == FALSE) {
|
|
g_free(filebuf);
|
|
return WTAP_OPEN_NOT_MINE;
|
|
}
|
|
|
|
if (file_seek(wth->fh, 0, SEEK_SET, err) == -1) {
|
|
g_free(filebuf);
|
|
return WTAP_OPEN_ERROR;
|
|
}
|
|
|
|
wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_JSON;
|
|
wth->file_encap = WTAP_ENCAP_JSON;
|
|
wth->file_tsprec = WTAP_TSPREC_SEC;
|
|
wth->subtype_read = json_read;
|
|
wth->subtype_seek_read = json_seek_read;
|
|
wth->snapshot_length = 0;
|
|
|
|
g_free(filebuf);
|
|
return WTAP_OPEN_MINE;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|