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/* conversation_filter.c
* Routines for dissector-generated conversation filters for use as
* display and color filters
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <glib.h>
#include "packet.h"
#include "conversation_filter.h"
GList *packet_conv_filter_list = NULL;
GList *log_conv_filter_list = NULL;
static GSList *conversation_proto_names = NULL;
void conversation_filters_init(void)
{
// add_conversation_filter_protocol prepends entries to the list. Add
// lower layers first so that upper-layer conversations take precedence.
add_conversation_filter_protocol("eth");
add_conversation_filter_protocol("ipv6");
add_conversation_filter_protocol("ip");
add_conversation_filter_protocol("udp");
add_conversation_filter_protocol("tcp");
}
static void do_register_conversation_filter(GList **conv_filter_list, const char *proto_name, const char *display_name,
is_filter_valid_func is_filter_valid, build_filter_string_func build_filter_string) {
conversation_filter_t *entry;
entry = g_new(conversation_filter_t, 1);
entry->proto_name = proto_name;
entry->display_name = display_name;
entry->is_filter_valid = is_filter_valid;
entry->build_filter_string = build_filter_string;
*conv_filter_list = g_list_append(*conv_filter_list, entry);
}
void register_conversation_filter(const char *proto_name, const char *display_name,
is_filter_valid_func is_filter_valid, build_filter_string_func build_filter_string) {
do_register_conversation_filter(&packet_conv_filter_list,
proto_name,
display_name,
is_filter_valid,
build_filter_string);
}
void register_log_conversation_filter(const char *proto_name, const char *display_name,
is_filter_valid_func is_filter_valid, build_filter_string_func build_filter_string) {
do_register_conversation_filter(&log_conv_filter_list,
proto_name,
display_name,
is_filter_valid,
build_filter_string);
}
void add_conversation_filter_protocol(const char *proto_name)
{
for (GSList *cur_entry = conversation_proto_names; cur_entry; cur_entry = g_slist_next(cur_entry)) {
if (strcmp(proto_name, cur_entry->data) == 0) {
return;
}
}
conversation_proto_names = g_slist_prepend(conversation_proto_names, (void *)proto_name);
}
static struct conversation_filter_s* find_conversation_filter(GList *conv_filter_list, const char *name)
{
GList *list_entry = conv_filter_list;
conversation_filter_t* filter;
while (list_entry != NULL) {
filter = (conversation_filter_t*)list_entry->data;
if (!strcmp(filter->proto_name, name))
return filter;
list_entry = g_list_next(list_entry);
}
return NULL;
}
static void conversation_filter_free(gpointer p, gpointer user_data _U_)
{
g_free(p);
}
void conversation_filters_cleanup(void)
{
g_list_foreach(packet_conv_filter_list, conversation_filter_free, NULL);
g_list_free(packet_conv_filter_list);
g_list_foreach(log_conv_filter_list, conversation_filter_free, NULL);
g_list_free(log_conv_filter_list);
g_slist_free(conversation_proto_names);
}
static gchar *conversation_filter_from_pinfo(GList *conv_filter_list, struct _packet_info *pinfo)
{
conversation_filter_t *conv_filter;
gchar *filter;
for (GSList *cur_entry = conversation_proto_names; cur_entry; cur_entry = g_slist_next(cur_entry)) {
conv_filter = find_conversation_filter(conv_filter_list, (const char *) cur_entry->data);
if (conv_filter && conv_filter->is_filter_valid(pinfo)) {
if ((filter = conv_filter->build_filter_string(pinfo)) != NULL)
return filter;
}
}
return NULL;
}
gchar *conversation_filter_from_packet(struct _packet_info *pinfo)
{
return conversation_filter_from_pinfo(packet_conv_filter_list, pinfo);
}
gchar *conversation_filter_from_log(struct _packet_info *pinfo)
{
return conversation_filter_from_pinfo(log_conv_filter_list, pinfo);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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