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/* export_object.c
* GUI independent helper routines common to all export object taps.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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 "proto.h"
#include "packet_info.h"
#include "export_object.h"
struct register_eo {
int proto_id; /* protocol id (0-indexed) */
const char* tap_listen_str; /* string used in register_tap_listener (NULL to use protocol name) */
tap_packet_cb eo_func; /* function to be called for new incoming packets for SRT */
export_object_gui_reset_cb reset_cb; /* function to parse parameters of optional arguments of tap string */
};
static GSList *registered_eo_tables = NULL;
static gint
insert_sorted_by_table_name(gconstpointer aparam, gconstpointer bparam)
{
const register_eo_t *a = (const register_eo_t *)aparam;
const register_eo_t *b = (const register_eo_t *)bparam;
return g_ascii_strcasecmp(proto_get_protocol_filter_name(a->proto_id), proto_get_protocol_filter_name(b->proto_id));
}
int
register_export_object(const int proto_id, tap_packet_cb export_packet_func, export_object_gui_reset_cb reset_cb)
{
register_eo_t *table;
DISSECTOR_ASSERT(export_packet_func);
table = g_new(register_eo_t,1);
table->proto_id = proto_id;
table->tap_listen_str = g_strdup_printf("%s_eo", proto_get_protocol_filter_name(proto_id));
table->eo_func = export_packet_func;
table->reset_cb = reset_cb;
registered_eo_tables = g_slist_insert_sorted(registered_eo_tables, table, insert_sorted_by_table_name);
return register_tap(table->tap_listen_str);
}
int get_eo_proto_id(register_eo_t* eo)
{
if (!eo) {
return -1;
}
return eo->proto_id;
}
const char* get_eo_tap_listener_name(register_eo_t* eo)
{
return eo->tap_listen_str;
}
tap_packet_cb get_eo_packet_func(register_eo_t* eo)
{
return eo->eo_func;
}
export_object_gui_reset_cb get_eo_reset_func(register_eo_t* eo)
{
return eo->reset_cb;
}
register_eo_t* get_eo_by_name(const char* name)
{
guint i, size = g_slist_length(registered_eo_tables);
register_eo_t* eo;
GSList *slist;
for (i = 0; i < size; i++) {
slist = g_slist_nth(registered_eo_tables, i);
eo = (register_eo_t*)slist->data;
if (strcmp(name, proto_get_protocol_filter_name(eo->proto_id)) == 0)
return eo;
}
return NULL;
}
void eo_iterate_tables(GFunc func, gpointer user_data)
{
g_slist_foreach(registered_eo_tables, func, user_data);
}
static GString *eo_rename(GString *gstr, int dupn)
{
GString *gstr_tmp;
gchar *tmp_ptr;
GString *ext_str;
gstr_tmp = g_string_new("(");
g_string_append_printf (gstr_tmp, "%d)", dupn);
if ( (tmp_ptr = strrchr(gstr->str, '.')) != NULL ) {
/* Retain the extension */
ext_str = g_string_new(tmp_ptr);
gstr = g_string_truncate(gstr, gstr->len - ext_str->len);
if ( gstr->len >= (EXPORT_OBJECT_MAXFILELEN - (strlen(gstr_tmp->str) + ext_str->len)) )
gstr = g_string_truncate(gstr, EXPORT_OBJECT_MAXFILELEN - (strlen(gstr_tmp->str) + ext_str->len));
gstr = g_string_append(gstr, gstr_tmp->str);
gstr = g_string_append(gstr, ext_str->str);
g_string_free(ext_str, TRUE);
}
else {
if ( gstr->len >= (EXPORT_OBJECT_MAXFILELEN - strlen(gstr_tmp->str)) )
gstr = g_string_truncate(gstr, EXPORT_OBJECT_MAXFILELEN - strlen(gstr_tmp->str));
gstr = g_string_append(gstr, gstr_tmp->str);
}
g_string_free(gstr_tmp, TRUE);
return gstr;
}
GString *
eo_massage_str(const gchar *in_str, gsize maxlen, int dupn)
{
gchar *tmp_ptr;
/* The characters in "reject" come from:
* http://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx.
* Add to the list as necessary for other OS's.
*/
const gchar *reject = "<>:\"/\\|?*"
"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a"
"\x0b\x0c\x0d\x0e\x0f\x10\x11\x12\x13\x14"
"\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f";
GString *out_str;
GString *ext_str;
out_str = g_string_new("");
/* Find all disallowed characters/bytes and replace them with %xx */
while ( (tmp_ptr = strpbrk(in_str, reject)) != NULL ) {
out_str = g_string_append_len(out_str, in_str, tmp_ptr - in_str);
g_string_append_printf(out_str, "%%%02x", *tmp_ptr);
in_str = tmp_ptr + 1;
}
out_str = g_string_append(out_str, in_str);
if ( out_str->len > maxlen ) {
if ( (tmp_ptr = strrchr(out_str->str, '.')) != NULL ) {
/* Retain the extension */
ext_str = g_string_new(tmp_ptr);
out_str = g_string_truncate(out_str, maxlen - ext_str->len);
out_str = g_string_append(out_str, ext_str->str);
g_string_free(ext_str, TRUE);
}
else
out_str = g_string_truncate(out_str, maxlen);
}
if ( dupn != 0 )
out_str = eo_rename(out_str, dupn);
return out_str;
}
const char *
eo_ct2ext(const char *content_type)
{
/* TODO: Map the content type string to an extension string. If no match,
* return NULL. */
return content_type;
}
void eo_free_entry(export_object_entry_t *entry)
{
g_free(entry->hostname);
g_free(entry->content_type);
g_free(entry->filename);
g_free(entry->payload_data);
g_free(entry);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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