epan/dissector_filters.c

   1 /* dissector_filters.c
   2  * Routines for dissector-generated conversation filters for use as
   3  * display and color filters
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #include <glib.h>
  15 #include "packet.h"
  16
  17 #include "dissector_filters.h"
  18
  19
  20 GList *conv_filter_list = NULL;
  21
  22
  23 void register_conversation_filter(const char *proto_name, const char *display_name,
  24                                         is_filter_valid_func is_filter_valid, build_filter_string_func build_filter_string) {
  25     conversation_filter_t *entry;
  26
  27     entry = (conversation_filter_t *)g_malloc(sizeof(conversation_filter_t));
  28
  29     entry->proto_name           = proto_name;
  30     entry->display_name         = display_name;
  31     entry->is_filter_valid      = is_filter_valid;
  32     entry->build_filter_string  = build_filter_string;
  33
  34     conv_filter_list = g_list_append(conv_filter_list, entry);
  35 }
  36
  37 struct conversation_filter_s* find_conversation_filter(const char *name)
  38 {
  39     GList *list_entry = conv_filter_list;
  40     conversation_filter_t* filter;
  41
  42     while (list_entry != NULL) {
  43         filter = (conversation_filter_t*)list_entry->data;
  44         if (!strcmp(filter->proto_name, name))
  45             return filter;
  46
  47         list_entry = g_list_next(list_entry);
  48     }
  49
  50     return NULL;
  51 }
  52
  53 static void conversation_filter_free(gpointer p, gpointer user_data _U_)
  54 {
  55     g_free(p);
  56 }
  57
  58 void conversation_filters_cleanup(void)
  59 {
  60     g_list_foreach(conv_filter_list, conversation_filter_free, NULL);
  61     g_list_free(conv_filter_list);
  62 }
  63
  64 gchar *conversation_filter_from_packet(struct _packet_info *pinfo)
  65 {
  66     const char *layers[] = { "tcp", "udp", "ip", "ipv6", "eth" };
  67     conversation_filter_t *conv_filter;
  68     gchar *filter;
  69     size_t i;
  70
  71     for (i = 0; i < G_N_ELEMENTS(layers); i++) {
  72         conv_filter = find_conversation_filter(layers[i]);
  73         if (conv_filter && conv_filter->is_filter_valid(pinfo)) {
  74             if ((filter = conv_filter->build_filter_string(pinfo)) != NULL)
  75                 return filter;
  76         }
  77     }
  78
  79     return NULL;
  80 }
  81
  82 /*
  83  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
  84  *
  85  * Local variables:
  86  * c-basic-offset: 4
  87  * tab-width: 8
  88  * indent-tabs-mode: nil
  89  * End:
  90  *
  91  * vi: set shiftwidth=4 tabstop=8 expandtab:
  92  * :indentSize=4:tabSize=8:noTabs=true:
  93  */