epan/dissectors/pidl/samr/samr.cnf cnf_dissect_lsa_BinaryString => lsarpc_dissect_str...
[wireshark-sm.git] / epan / dissectors / packet-h221_nonstd.c
blob83903b369643b94d579a9c159b708698f0dc902d
1 /* packet-h221_nonstd.c
2 * Routines for H.221 nonstandard parameters disassembly
4 * Wireshark - Network traffic analyzer
5 * By Gerald Combs <gerald@wireshark.org>
6 * Copyright 1998 Gerald Combs
8 * SPDX-License-Identifier: GPL-2.0-or-later
9 */
11 #include "config.h"
13 #include <epan/packet.h>
15 void proto_register_nonstd(void);
16 void proto_reg_handoff_nonstd(void);
18 static dissector_handle_t ms_nonstd_handle;
20 /* Define the nonstd proto */
21 static int proto_nonstd;
23 static int hf_h221_nonstd_netmeeting_codec;
24 static int hf_h221_nonstd_netmeeting_non_standard;
27 * Define the trees for nonstd
28 * We need one for nonstd itself and one for the nonstd paramters
30 static int ett_nonstd;
32 static const value_string ms_codec_vals[] = {
33 { 0x0111, "L&H CELP 4.8k" },
34 { 0x0200, "MS-ADPCM" },
35 { 0x0211, "L&H CELP 8k" },
36 { 0x0311, "L&H CELP 12k" },
37 { 0x0411, "L&H CELP 16k" },
38 { 0x1100, "IMA-ADPCM" },
39 { 0x3100, "MS-GSM" },
40 { 0xfeff, "E-AMR" },
41 { 0, NULL }
44 static int
45 dissect_ms_nonstd(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
47 proto_item *it;
48 proto_tree *tr;
49 uint32_t offset=0;
50 int tvb_len;
51 uint16_t codec_extra;
53 it=proto_tree_add_protocol_format(tree, proto_nonstd, tvb, 0, tvb_reported_length(tvb), "Microsoft NonStd");
54 tr=proto_item_add_subtree(it, ett_nonstd);
57 tvb_len = tvb_reported_length(tvb);
60 * XXX - why do this test? Are there any cases where throwing
61 * an exception if the tvbuff is too short causes subsequent stuff
62 * in the packet not to be dissected (e.g., if the octet string
63 * containing the non-standard data is too short for the data
64 * supposedly contained in it, and is followed by more items)?
66 * If so, the right fix might be to catch ReportedBoundsError in
67 * the dissector calling this dissector, and report a malformed
68 * nonStandardData item, and rethrow other exceptions (as a
69 * BoundsError means you really *have* run out of packet data).
71 if(tvb_len >= 23)
74 codec_extra = tvb_get_ntohs(tvb,offset+22);
76 if(codec_extra == 0x0100)
79 proto_tree_add_item(tr, hf_h221_nonstd_netmeeting_codec, tvb, offset+20, 2, ENC_BIG_ENDIAN);
82 else
85 proto_tree_add_item(tr, hf_h221_nonstd_netmeeting_non_standard, tvb, offset, -1, ENC_NA);
89 return tvb_captured_length(tvb);
92 /* Register all the bits needed with the filtering engine */
94 void
95 proto_register_nonstd(void)
97 static hf_register_info hf[] = {
98 { &hf_h221_nonstd_netmeeting_codec,
99 { "Microsoft NetMeeting Codec", "h221nonstd.netmeeting.codec", FT_UINT32, BASE_HEX,
100 VALS(ms_codec_vals), 0, NULL, HFILL }
102 { &hf_h221_nonstd_netmeeting_non_standard,
103 { "Microsoft NetMeeting Non Standard", "h221nonstd.netmeeting.non_standard", FT_BYTES, BASE_NONE,
104 NULL, 0, NULL, HFILL }
108 static int *ett[] = {
109 &ett_nonstd,
112 proto_nonstd = proto_register_protocol("H221NonStandard","h221nonstd", "h221nonstd");
114 proto_register_subtree_array(ett, array_length(ett));
115 proto_register_field_array(proto_nonstd, hf, array_length(hf));
117 ms_nonstd_handle = register_dissector("h221nonstd", dissect_ms_nonstd, proto_nonstd);
120 /* The registration hand-off routine */
121 void
122 proto_reg_handoff_nonstd(void)
124 dissector_add_uint("h245.nsp.h221",0xb500534c, ms_nonstd_handle);
125 dissector_add_uint("h225.nsp.h221",0xb500534c, ms_nonstd_handle);
129 * Editor modelines - https://www.wireshark.org/tools/modelines.html
131 * Local variables:
132 * c-basic-offset: 4
133 * tab-width: 8
134 * indent-tabs-mode: nil
135 * End:
137 * vi: set shiftwidth=4 tabstop=8 expandtab:
138 * :indentSize=4:tabSize=8:noTabs=true: