forked from osmocom/wireshark
117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* export_object_ui.c
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* Common routines for tracking & saving objects found in streams of data
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* Copyright 2007, Stephen Fisher (see AUTHORS file)
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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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,
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* USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <errno.h>
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#include <glib.h>
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#include <epan/packet_info.h>
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#include <epan/tap.h>
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#include <wiretap/wtap.h>
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#include <wsutil/file_util.h>
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#include <ui/alert_box.h>
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#include "export_object_ui.h"
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gboolean
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eo_save_entry(const gchar *save_as_filename, export_object_entry_t *entry, gboolean show_err)
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{
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int to_fd;
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gint64 bytes_left;
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int bytes_to_write;
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ssize_t bytes_written;
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guint8 *ptr;
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int err;
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to_fd = ws_open(save_as_filename, O_WRONLY | O_CREAT | O_EXCL |
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O_BINARY, 0644);
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if(to_fd == -1) { /* An error occurred */
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if (show_err)
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open_failure_alert_box(save_as_filename, errno, TRUE);
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return FALSE;
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}
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/*
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* The third argument to _write() on Windows is an unsigned int,
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* so, on Windows, that's the size of the third argument to
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* ws_write().
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*
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* The third argument to write() on UN*X is a size_t, although
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* the return value is an ssize_t, so one probably shouldn't
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* write more than the max value of an ssize_t.
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*
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* In either case, there's no guarantee that a gint64 such as
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* payload_len can be passed to ws_write(), so we write in
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* chunks of, at most 2^31 bytes.
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*/
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ptr = entry->payload_data;
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bytes_left = entry->payload_len;
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while (bytes_left != 0) {
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if (bytes_left > 0x40000000)
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bytes_to_write = 0x40000000;
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else
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bytes_to_write = (int)bytes_left;
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bytes_written = ws_write(to_fd, ptr, bytes_to_write);
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if(bytes_written <= 0) {
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if (bytes_written < 0)
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err = errno;
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else
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err = WTAP_ERR_SHORT_WRITE;
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if (show_err)
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write_failure_alert_box(save_as_filename, err);
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ws_close(to_fd);
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return FALSE;
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}
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bytes_left -= bytes_written;
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ptr += bytes_written;
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}
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if (ws_close(to_fd) < 0) {
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if (show_err)
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write_failure_alert_box(save_as_filename, errno);
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return FALSE;
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}
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return TRUE;
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}
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/*
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* Editor modelines
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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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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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