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packet-xmpp-utils.h
1/* packet-xmpp-utils.h
2 *
3 * Copyright 2011, Mariusz Okroj <okrojmariusz[]gmail.com>
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#ifndef XMPP_UTILS_H
13#define XMPP_UTILS_H
14
15#include "ws_symbol_export.h"
16#include <epan/tvbuff.h>
17#include <epan/dissectors/packet-xml.h>
18#include <epan/wmem_scopes.h>
19
20#define xmpp_elem_cdata(elem) \
21 elem->data?elem->data->value:""
22
23 typedef struct _xmpp_array_t
24{
25 void *data;
26 int length;
27} xmpp_array_t;
28
29 typedef struct _xmpp_attr_t{
30 const char *value;
31 const char *name;
32 int offset;
33 int length;
34
35 bool was_read;
36} xmpp_attr_t;
37
38 typedef struct _xmpp_data_t{
39 char *value;
40
41 int offset;
42 int length;
43} xmpp_data_t;
44
45 typedef struct _xmpp_element_t{
46 char* name;
47
48 /*abbreviation that appears before tag name (<nos:x .../>)
49 if abbrev doesn't appear then NULL*/
50 char* default_ns_abbrev;
51 /*pair of namespace abbrev and namespace*/
52 GHashTable *namespaces;
53
54 GHashTable *attrs;
55 GList *elements;
56 xmpp_data_t *data;
57
58 int offset;
59 int length;
60
61 bool was_read;
62} xmpp_element_t;
63
64/*informations about attributes that are displayed in proto tree*/
65 typedef struct _xmpp_attr_info{
66 const char *name;
67 const int *phf;
68 bool is_required;
69 bool in_short_list;
70
71 /*function validates this attribute
72 it may impose other restrictions (e.g. validating attribute's name, ...)*/
73 void (*val_func)(packet_info *pinfo, proto_item *item, const char *name, const char *value, const void *data);
74 void *data;
75} xmpp_attr_info;
76
77 typedef struct _xmpp_attr_info_ext{
78 const char* ns;
79 xmpp_attr_info info;
80} xmpp_attr_info_ext;
81
82 typedef enum _xmpp_elem_info_type{
83 NAME,
84 ATTR,
85 NAME_AND_ATTR,
86 NAMES
87} xmpp_elem_info_type;
88
89 typedef enum _xmpp_elem_info_occurrence
90{
91 ONE,MANY
92} xmpp_elem_info_occurrence;
93
94/*informations about elements that are displayed in proto tree*/
95 typedef struct _xmpp_elem_info{
96 xmpp_elem_info_type type;
97 const void *data;
98 /*function that displays element in tree*/
99 void (*elem_func)(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo, xmpp_element_t* element);
100 xmpp_elem_info_occurrence occurrence;
101} xmpp_elem_info;
102
103 typedef struct _xmpp_conv_info_t {
104 wmem_tree_t *req_resp;
105 wmem_tree_t *jingle_sessions;
106 wmem_tree_t *ibb_sessions;
107 wmem_tree_t *gtalk_sessions;
108 uint32_t ssl_start;
109} xmpp_conv_info_t;
110
114 typedef struct _xmpp_reqresp_transaction_t {
115 uint32_t req_frame;
116 uint32_t resp_frame;
117} xmpp_transaction_t;
118
124 extern void xmpp_iq_reqresp_track(packet_info *pinfo, xmpp_element_t *packet, xmpp_conv_info_t *xmpp_info);
125
129 extern void xmpp_jingle_session_track(packet_info *pinfo, xmpp_element_t *packet, xmpp_conv_info_t *xmpp_info);
130
134 extern void xmpp_ibb_session_track(packet_info *pinfo, xmpp_element_t *packet, xmpp_conv_info_t *xmpp_info);
135
139 extern void xmpp_gtalk_session_track(packet_info *pinfo, xmpp_element_t *packet, xmpp_conv_info_t *xmpp_info);
140
145 extern void xmpp_unknown(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, xmpp_element_t *element);
146
152 extern void xmpp_cdata(proto_tree *tree, tvbuff_t *tvb, xmpp_element_t *element, int hf);
153
157 extern void xmpp_simple_cdata_elem(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, xmpp_element_t *element);
158
161 extern xmpp_element_t* xmpp_xml_frame_to_element_t(packet_info *pinfo, xml_frame_t *xml_frame, xmpp_element_t *parent, tvbuff_t *tvb);
162
166 extern void xmpp_element_t_tree_free(xmpp_element_t *root);
167
169 extern xmpp_array_t* xmpp_ep_init_array_t(wmem_allocator_t *pool, const char** array, int len);
170
171/*Allocs ephemeral memory for xmpp_attr_t struct*/
172 extern xmpp_attr_t* xmpp_ep_init_attr_t(wmem_allocator_t *pool, const char *value, int offset, int length);
173
178 extern xmpp_element_t* xmpp_steal_element_by_name(xmpp_element_t *packet, const char *name);
179 extern xmpp_element_t* xmpp_steal_element_by_names(xmpp_element_t *packet, const char **names, int names_len);
180 extern xmpp_element_t* xmpp_steal_element_by_attr(xmpp_element_t *packet, const char *attr_name, const char *attr_value);
181 extern xmpp_element_t* xmpp_steal_element_by_name_and_attr(xmpp_element_t *packet, const char *name, const char *attr_name, const char *attr_value);
182
183/*Returns first child in element*/
184 extern xmpp_element_t* xmpp_get_first_element(xmpp_element_t *packet);
185
186/*Converts element to string. Returns memory allocated from the given pool.*/
187 extern char* xmpp_element_to_string(wmem_allocator_t *pool, tvbuff_t *tvb, xmpp_element_t *element);
188
189/* Returns attribute by name and set as read. If attrib is set as read, it may be found
190 * one more time, but it is invisible for function xmpp_unknown_attrib*/
191 extern xmpp_attr_t* xmpp_get_attr(xmpp_element_t *element, const char* attr_name);
192
193/*Function hides first element in tree.*/
194 extern void xmpp_proto_tree_hide_first_child(proto_tree *tree);
195
196/*Function shows first element in tree.*/
197 extern void xmpp_proto_tree_show_first_child(proto_tree *tree);
198
199/*Function returns item as text. Memory is allocated from the given pool.*/
200 extern char* proto_item_get_text(wmem_allocator_t *pool, proto_item *item);
201
202/*Function returns struct that contains 3 strings. It is used to build xmpp_attr_info struct.*/
203 extern void *xmpp_name_attr_struct(wmem_allocator_t *pool, const char *name, const char *attr_name, const char *attr_value);
204
213 extern void xmpp_display_attrs(proto_tree *tree, xmpp_element_t *element, packet_info *pinfo, tvbuff_t *tvb, const xmpp_attr_info *attrs, unsigned n);
214
227 extern void xmpp_display_attrs_ext(proto_tree *tree, xmpp_element_t *element, packet_info *pinfo, tvbuff_t *tvb, const xmpp_attr_info_ext *attrs, unsigned n);
228
234 extern void xmpp_display_elems(proto_tree *tree, xmpp_element_t *parent, packet_info *pinfo, tvbuff_t *tvb, xmpp_elem_info *elems, unsigned n);
235
236/* Validates attribute value. Takes string array(char**) in parameter data.
237 * Is used in XMPP_ATTR_INFO struct.
238 */
239 extern void xmpp_val_enum_list(packet_info *pinfo, proto_item *item, const char *name, const char *value, const void *data);
240
245 extern void xmpp_change_elem_to_attrib(wmem_allocator_t *pool, const char *elem_name, const char *attr_name, xmpp_element_t *parent, xmpp_attr_t* (*transform_func)(wmem_allocator_t *pool, xmpp_element_t *element));
246
249 extern xmpp_attr_t* xmpp_transform_func_cdata(wmem_allocator_t *pool, xmpp_element_t *elem);
250
251#endif /* XMPP_UTILS_H */
_packet_info
Definition packet_info.h:43
_proto_node
Definition proto.h:907
_wmem_allocator_t
Internal memory allocator interface used by the wmem subsystem.
Definition wmem_allocator.h:34
_wmem_tree_t
Internal representation of a wmem balanced tree.
Definition wmem_tree-int.h:81
_xml_frame_t
Definition packet-xml.h:25
_xmpp_array_t
Definition packet-xmpp-utils.h:24
_xmpp_attr_info_ext
Definition packet-xmpp-utils.h:77
_xmpp_attr_info
Definition packet-xmpp-utils.h:65
_xmpp_attr_t
Definition packet-xmpp-utils.h:29
_xmpp_conv_info_t
Definition packet-xmpp-utils.h:103
_xmpp_data_t
Definition packet-xmpp-utils.h:38
_xmpp_elem_info
Definition packet-xmpp-utils.h:95
_xmpp_element_t
Definition packet-xmpp-utils.h:45
_xmpp_reqresp_transaction_t
Definition packet-xmpp-utils.h:114
info
Definition file-pcapng.h:57
tvbuff
Definition tvbuff-int.h:36
tvbuff.h
wmem_scopes.h