1 /* packet-h501.c
2  * Routines for H.501 packet dissection
3  * 2007  Tomas Kukosa
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 <epan/packet.h>
15 #include <epan/prefs.h>
16 #include <epan/oids.h>
17 #include <epan/asn1.h>
18 
19 #include "packet-tpkt.h"
20 #include "packet-per.h"
21 #include "packet-h225.h"
22 #include "packet-h235.h"
23 
24 #define PNAME  "H.501 Mobility"
25 #define PSNAME "H.501"
26 #define PFNAME "h501"
27 
28 void proto_register_h501(void);
29 
30 /* Initialize the protocol and registered fields */
31 static int proto_h501 = -1;
32 #include "packet-h501-hf.c"
33 
34 /* Initialize the subtree pointers */
35 static int ett_h501 = -1;
36 #include "packet-h501-ett.c"
37 
38 /* Dissectors */
39 static dissector_handle_t h501_pdu_handle;
40 
41 /* Preferences */
42 #define H501_PORT 2099
43 static gboolean h501_desegment_tcp = TRUE;
44 
45 void proto_reg_handoff_h501(void);
46 
47 #include "packet-h501-fn.c"
48 
49 static int
50 dissect_h501_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
51 {
52   proto_item  *ti = NULL;
53   proto_tree  *h501_tree = NULL;
54 
55   col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
56 
57   ti = proto_tree_add_item(tree, proto_h501, tvb, 0, -1, ENC_NA);
58   h501_tree = proto_item_add_subtree(ti, ett_h501);
59 
60   return dissect_Message_PDU(tvb, pinfo, h501_tree, NULL);
61 }
62 
63 static int
64 dissect_h501_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
65 {
66   dissect_tpkt_encap(tvb, pinfo, tree, FALSE, h501_pdu_handle);
67   return tvb_captured_length(tvb);
68 }
69 
70 static int
71 dissect_h501_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
72 {
73   dissect_tpkt_encap(tvb, pinfo, tree, h501_desegment_tcp, h501_pdu_handle);
74   return tvb_captured_length(tvb);
75 }
76 
77 /*--- proto_register_h501 ----------------------------------------------*/
78 void proto_register_h501(void) {
79   module_t *h501_module;
80 
81   /* List of fields */
82   static hf_register_info hf[] = {
83 #include "packet-h501-hfarr.c"
84   };
85 
86   /* List of subtrees */
87   static gint *ett[] = {
88     &ett_h501,
89 #include "packet-h501-ettarr.c"
90   };
91 
92   /* Register protocol */
93   proto_h501 = proto_register_protocol(PNAME, PSNAME, PFNAME);
94 
95   /* Register fields and subtrees */
96   proto_register_field_array(proto_h501, hf, array_length(hf));
97   proto_register_subtree_array(ett, array_length(ett));
98 
99   h501_pdu_handle = register_dissector(PFNAME, dissect_h501_pdu, proto_h501);
100 
101   h501_module = prefs_register_protocol(proto_h501, NULL);
102   prefs_register_bool_preference(h501_module, "desegment",
103                                  "Desegment H.501 over TCP",
104                                  "Desegment H.501 messages that span more TCP segments",
105                                  &h501_desegment_tcp);
106 
107 }
108 
109 /*--- proto_reg_handoff_h501 -------------------------------------------*/
110 void proto_reg_handoff_h501(void)
111 {
112   dissector_handle_t h501_udp_handle;
113   dissector_handle_t h501_tcp_handle;
114 
115   h501_udp_handle = create_dissector_handle(dissect_h501_udp, proto_h501);
116   h501_tcp_handle = create_dissector_handle(dissect_h501_tcp, proto_h501);
117   dissector_add_uint_with_preference("tcp.port", H501_PORT, h501_tcp_handle);
118   dissector_add_uint_with_preference("udp.port", H501_PORT, h501_udp_handle);
119 }
120 
121