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wireshark/gtk/decode_as_dcerpc.c

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/* decode_as_dcerpc.c
*
* $Id$
*
* Routines to modify dcerpc bindings on the fly.
*
* Copyright 2004 Ulf Lamping
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gtk/gtk.h>
#include <epan/packet.h>
#include <epan/ipproto.h>
#include <epan/epan_dissect.h>
#include <epan/dissectors/packet-dcerpc.h>
#include "../globals.h"
#include "../simple_dialog.h"
#include "gtk/decode_as_dlg.h"
#include "gtk/dlg_utils.h"
#include "gtk/gui_utils.h"
#include "gtk/decode_as_dcerpc.h"
/**************************************************/
/* Typedefs & Enums */
/**************************************************/
/* list of dcerpc "Decode As" bindings */
GSList *decode_dcerpc_bindings = NULL;
/**************************************************/
/* Global Functions */
/**************************************************/
/* inject one of our bindings into the dcerpc binding table */
static void
decode_dcerpc_inject_binding(gpointer data, gpointer user_data _U_)
{
dcerpc_add_conv_to_bind_table((decode_dcerpc_bind_values_t *) data);
}
/* inject all of our bindings into the dcerpc binding table */
static void
decode_dcerpc_inject_bindings(gpointer data _U_) {
g_slist_foreach(decode_dcerpc_bindings, decode_dcerpc_inject_binding, NULL /* user_data */);
}
/* init this file */
void
decode_dcerpc_init(void) {
GHook* hook_init_proto;
/* add a hook function to the dcerpc init_protocols hook */
hook_init_proto = g_hook_alloc(&dcerpc_hooks_init_protos);
hook_init_proto->func = decode_dcerpc_inject_bindings;
g_hook_prepend(&dcerpc_hooks_init_protos, hook_init_proto);
}
/* clone a binding (uses g_malloc) */
static decode_dcerpc_bind_values_t *
decode_dcerpc_binding_clone(decode_dcerpc_bind_values_t *binding_in)
{
decode_dcerpc_bind_values_t *stored_binding;
stored_binding = g_malloc(sizeof(decode_dcerpc_bind_values_t));
*stored_binding = *binding_in;
COPY_ADDRESS(&stored_binding->addr_a, &binding_in->addr_a);
COPY_ADDRESS(&stored_binding->addr_b, &binding_in->addr_b);
stored_binding->ifname = g_string_new(binding_in->ifname->str);
return stored_binding;
}
/* free a binding */
void
decode_dcerpc_binding_free(void *binding_in)
{
decode_dcerpc_bind_values_t *binding = binding_in;
g_free((void *) binding->addr_a.data);
g_free((void *) binding->addr_b.data);
if(binding->ifname)
g_string_free(binding->ifname, TRUE);
g_free(binding);
}
/* compare two bindings (except the interface related things, e.g. uuid) */
static gint
decode_dcerpc_binding_cmp(gconstpointer a, gconstpointer b)
{
const decode_dcerpc_bind_values_t *binding_a = a;
const decode_dcerpc_bind_values_t *binding_b = b;
/* don't compare uuid and ver! */
if(
ADDRESSES_EQUAL(&binding_a->addr_a, &binding_b->addr_a) &&
ADDRESSES_EQUAL(&binding_a->addr_b, &binding_b->addr_b) &&
binding_a->ptype == binding_b->ptype &&
binding_a->port_a == binding_b->port_a &&
binding_a->port_b == binding_b->port_b &&
binding_a->ctx_id == binding_b->ctx_id &&
binding_a->smb_fid == binding_b->smb_fid)
{
/* equal */
return 0;
}
/* unequal */
return 1;
}
/**************************************************/
/* Show Changed Bindings */
/**************************************************/
/* add a single binding to the Show list */
static void
decode_dcerpc_add_show_list_single(gpointer data, gpointer user_data)
{
gchar string1[20];
decode_dcerpc_bind_values_t *binding = data;
g_snprintf(string1, sizeof(string1), "ctx_id: %u", binding->ctx_id);
decode_add_to_show_list (
user_data,
"DCE-RPC",
string1,
"-",
binding->ifname->str);
}
/* add all bindings to the Show list */
void
decode_dcerpc_add_show_list(gpointer user_data)
{
g_slist_foreach(decode_dcerpc_bindings, decode_dcerpc_add_show_list_single, user_data);
}
/**************************************************/
/* Modify the binding routines */
/**************************************************/
/* removes all bindings */
void
decode_dcerpc_reset_all(void)
{
decode_dcerpc_bind_values_t *binding;
while(decode_dcerpc_bindings) {
binding = decode_dcerpc_bindings->data;
decode_dcerpc_binding_free(binding);
decode_dcerpc_bindings = g_slist_remove(
decode_dcerpc_bindings,
decode_dcerpc_bindings->data);
}
}
/* remove a binding (looking the same way as the given one) */
static void
decode_dcerpc_binding_reset(
const gchar *table_name _U_,
decode_dcerpc_bind_values_t *binding)
{
GSList *le;
decode_dcerpc_bind_values_t *old_binding;
/* find the old binding (if it exists) */
le = g_slist_find_custom(decode_dcerpc_bindings,
binding,
decode_dcerpc_binding_cmp);
if(le == NULL)
return;
old_binding = le->data;
decode_dcerpc_bindings = g_slist_remove(decode_dcerpc_bindings, le->data);
g_free((void *) old_binding->addr_a.data);
g_free((void *) old_binding->addr_b.data);
g_string_free(old_binding->ifname, TRUE);
g_free(old_binding);
}
/* a binding has changed (remove a previously existing one) */
static void
decode_dcerpc_binding_change(
const gchar *table_name,
decode_dcerpc_bind_values_t *binding)
{
decode_dcerpc_bind_values_t *stored_binding;
/* remove a probably existing old binding */
decode_dcerpc_binding_reset(table_name, binding);
/* clone the new binding and append it to the list */
stored_binding = decode_dcerpc_binding_clone(binding);
decode_dcerpc_bindings = g_slist_append (decode_dcerpc_bindings, stored_binding);
}
/* a binding has changed (add/replace/remove it) */
static void
decode_change_one_dcerpc_binding(const gchar *table_name, decode_dcerpc_bind_values_t *binding, GtkWidget *list)
{
dcerpc_uuid_key *key;
gchar *abbrev;
GtkTreeSelection *selection;
GtkTreeModel *model;
GtkTreeIter iter;
selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(list));
if (gtk_tree_selection_get_selected(selection, &model, &iter) == FALSE)
{
abbrev = NULL;
key = NULL;
} else {
gtk_tree_model_get(model, &iter, E_LIST_S_PROTO_NAME, &abbrev,
E_LIST_S_TABLE+1, &key, -1);
}
if (key == NULL || (abbrev != NULL && strcmp(abbrev, "(default)") == 0) ) {
decode_dcerpc_binding_reset(table_name, binding);
} else {
binding->ifname = g_string_new(abbrev);
binding->uuid = key->uuid;
binding->ver = key->ver;
decode_dcerpc_binding_change(table_name, binding);
}
g_free(abbrev);
}
/**************************************************/
/* Action routines for the "Decode As..." dialog */
/* - called when the OK button pressed */
/**************************************************/
/*
* This routine is called when the user clicks the "OK" button in the
* "Decode As..." dialog window and the DCE-RPC page is foremost.
* This routine takes care of making any changes requested to the DCE-RPC
* binding tables.
*
* @param notebook_pg A pointer to the "DCE-RPC" notebook page.
*/
static void
decode_dcerpc(GtkWidget *notebook_pg)
{
GtkWidget *list;
const gchar *table_name;
decode_dcerpc_bind_values_t *binding;
list = g_object_get_data(G_OBJECT(notebook_pg), E_PAGE_LIST);
if (requested_action == E_DECODE_NO)
gtk_tree_selection_unselect_all(gtk_tree_view_get_selection(GTK_TREE_VIEW(list)));
binding = g_object_get_data(G_OBJECT(notebook_pg), E_PAGE_BINDING);
/*table_name = g_object_get_data(G_OBJECT(notebook_pg), E_PAGE_TABLE);*/
table_name = "DCE-RPC";
decode_change_one_dcerpc_binding(table_name, binding, list);
}
/**************************************************/
/* Dialog setup */
/**************************************************/
/* add an interface to the list */
static void
decode_dcerpc_add_to_list(gpointer key, gpointer value, gpointer user_data)
{
/*dcerpc_uuid_key *k = key;*/
dcerpc_uuid_value *v = value;
if(strcmp(v->name, "(none)"))
decode_add_to_list("DCE-RPC", v->name, key, user_data);
}
/* add all interfaces to the list */
static GtkWidget *
decode_add_dcerpc_menu (GtkWidget *page, const gchar *table_name _U_)
{
GtkWidget *scrolled_window;
GtkWidget *list;
decode_list_menu_start(page, &list, &scrolled_window);
g_hash_table_foreach(dcerpc_uuids, decode_dcerpc_add_to_list, list);
decode_list_menu_finish(list);
return(scrolled_window);
}
/* add a DCE-RPC page to the notebook */
GtkWidget *
decode_dcerpc_add_page (packet_info *pinfo)
{
GtkWidget *page_hb, *info_vb, *label, *scrolled_window;
GString *gs = g_string_new("");
GString *gs2 = g_string_new("");
decode_dcerpc_bind_values_t *binding;
/* clone binding */
binding = g_malloc(sizeof(decode_dcerpc_bind_values_t));
COPY_ADDRESS(&binding->addr_a, &pinfo->src);
COPY_ADDRESS(&binding->addr_b, &pinfo->dst);
binding->ptype = pinfo->ptype;
binding->port_a = pinfo->srcport;
binding->port_b = pinfo->destport;
binding->ctx_id = pinfo->dcectxid;
binding->smb_fid = dcerpc_get_transport_salt(pinfo);
binding->ifname = NULL;
/*binding->uuid = NULL;*/
binding->ver = 0;
/* create page content */
page_hb = gtk_hbox_new(FALSE, 5);
g_object_set_data(G_OBJECT(page_hb), E_PAGE_ACTION, decode_dcerpc);
g_object_set_data(G_OBJECT(page_hb), E_PAGE_TABLE, "DCE-RPC");
g_object_set_data(G_OBJECT(page_hb), E_PAGE_TITLE, "DCE-RPC");
g_object_set_data(G_OBJECT(page_hb), E_PAGE_BINDING, binding);
info_vb = gtk_vbox_new(FALSE, 5);
gtk_box_pack_start(GTK_BOX(page_hb), info_vb, TRUE, TRUE, 0);
/* Always enabled */
label = gtk_label_new("Replace binding between:");
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
switch(binding->ptype) {
case(PT_TCP):
g_string_printf(gs2, "TCP port");
break;
case(PT_UDP):
g_string_printf(gs2, "UDP port");
break;
default:
g_string_printf(gs2, "Unknown port type");
}
/* XXX - how to print the address binding->addr_a? */
g_string_printf(gs, "Address: ToBeDone %s: %u", gs2->str, binding->port_a);
label = gtk_label_new(gs->str);
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
label = gtk_label_new("&");
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
/* XXX - how to print the address binding->addr_b? */
g_string_printf(gs, "Address: ToBeDone %s: %u", gs2->str, binding->port_b);
label = gtk_label_new(gs->str);
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
label = gtk_label_new("&");
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
g_string_printf(gs, "Context ID: %u", binding->ctx_id);
label = gtk_label_new(gs->str);
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
label = gtk_label_new("&");
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
gtk_widget_set_sensitive(label, binding->smb_fid);
g_string_printf(gs, "SMB FID: %u", binding->smb_fid);
label = gtk_label_new(gs->str);
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
gtk_widget_set_sensitive(label, binding->smb_fid);
/* Conditionally enabled - only when decoding packets */
label = gtk_label_new("with:");
gtk_box_pack_start(GTK_BOX(info_vb), label, TRUE, TRUE, 0);
decode_dimmable = g_slist_prepend(decode_dimmable, label);
scrolled_window = decode_add_dcerpc_menu(page_hb, "dcerpc" /*table_name*/);
gtk_box_pack_start(GTK_BOX(page_hb), scrolled_window, TRUE, TRUE, 0);
decode_dimmable = g_slist_prepend(decode_dimmable, scrolled_window);
g_string_free(gs, TRUE);
return(page_hb);
}
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