forked from osmocom/wireshark
11c10244ef
The libjsmn was imported into the tree and enhanced with a new function. This change splits it into the "original" libjsmn and an addictional module wsjsmn that contains the new function. This will make easier to port within the tree future versions of the library. Change-Id: I3f1caa91bee462e0767e5e18d0b6a10f0b1cad32 Reviewed-on: https://code.wireshark.org/review/17963 Petri-Dish: Peter Wu <peter@lekensteyn.nl> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Peter Wu <peter@lekensteyn.nl>
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/* json.c
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*
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* Copyright 2015, Dario Lombardo <lomato@gmail.com>
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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 <string.h>
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#include "wtap-int.h"
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#include "file_wrappers.h"
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#include "json.h"
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#include <wsutil/wsjsmn.h>
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static gboolean json_read_file(wtap *wth, 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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gint64 file_size;
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int packet_size;
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if ((file_size = wtap_file_size(wth, err)) == -1)
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return FALSE;
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if (file_size > MAX_FILE_SIZE) {
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/*
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* Don't blow up trying to allocate space for an
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* immensely-large file.
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*/
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*err = WTAP_ERR_BAD_FILE;
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*err_info = g_strdup_printf("mime_file: File has %" G_GINT64_MODIFIER "d-byte packet, bigger than maximum of %u",
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file_size, MAX_FILE_SIZE);
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return FALSE;
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}
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packet_size = (int)file_size;
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phdr->rec_type = REC_TYPE_PACKET;
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phdr->presence_flags = 0; /* yes, we have no bananas^Wtime stamp */
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phdr->caplen = packet_size;
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phdr->len = packet_size;
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phdr->ts.secs = 0;
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phdr->ts.nsecs = 0;
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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 json_seek_read(wtap *wth, gint64 seek_off, struct wtap_pkthdr *phdr, Buffer *buf,
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int *err, gchar **err_info)
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{
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/* there is only one packet */
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if (seek_off > 0) {
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*err = 0;
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return FALSE;
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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 json_read_file(wth, wth->random_fh, phdr, buf, err, err_info);
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}
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static gboolean json_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
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{
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gint64 offset;
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*err = 0;
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offset = file_tell(wth->fh);
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/* there is only ever one packet */
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if (offset != 0)
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return FALSE;
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*data_offset = offset;
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return json_read_file(wth, wth->fh, &wth->phdr, wth->frame_buffer, err, err_info);
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}
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wtap_open_return_val json_open(wtap *wth, int *err, gchar **err_info)
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{
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guint8* filebuf;
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int bytes_read;
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filebuf = (guint8*)g_malloc0(MAX_FILE_SIZE);
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if (!filebuf)
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return WTAP_OPEN_ERROR;
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bytes_read = file_read(filebuf, MAX_FILE_SIZE, wth->fh);
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if (bytes_read < 0) {
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/* Read error. */
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*err = file_error(wth->fh, err_info);
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g_free(filebuf);
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return WTAP_OPEN_ERROR;
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}
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if (bytes_read == 0) {
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/* empty file, not *anybody's* */
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g_free(filebuf);
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return WTAP_OPEN_NOT_MINE;
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}
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if (jsmn_is_json(filebuf, bytes_read) == FALSE) {
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g_free(filebuf);
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return WTAP_OPEN_NOT_MINE;
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}
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if (file_seek(wth->fh, 0, SEEK_SET, err) == -1) {
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g_free(filebuf);
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return WTAP_OPEN_ERROR;
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}
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wth->file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_JSON;
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wth->file_encap = WTAP_ENCAP_JSON;
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wth->file_tsprec = WTAP_TSPREC_SEC;
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wth->subtype_read = json_read;
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wth->subtype_seek_read = json_seek_read;
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wth->snapshot_length = 0;
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g_free(filebuf);
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return WTAP_OPEN_MINE;
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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