2 * Routines for chargen packet dissection
3 * Copyright 2014, Dario Lombardo <lomato@gmail.com>
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * Chargen specs taken from RFC 864
10 * https://tools.ietf.org/html/rfc864
12 * SPDX-License-Identifier: GPL-2.0-or-later
17 #include <epan/packet.h>
18 #define CHARGEN_PORT_UDP 19
19 #define CHARGEN_PORT_TCP 19
21 void proto_register_chargen(void);
22 void proto_reg_handoff_chargen(void);
24 static dissector_handle_t chargen_handle
;
26 static int proto_chargen
;
28 static int hf_chargen_data
;
30 static int ett_chargen
;
32 /* dissect_chargen - dissects chargen packet data
33 * tvb - tvbuff for packet data (IN)
35 * proto_tree - resolved protocol tree
38 dissect_chargen(tvbuff_t
*tvb
, packet_info
*pinfo
, proto_tree
*tree
, void* dissector_data _U_
)
40 proto_tree
* chargen_tree
;
45 col_set_str(pinfo
->cinfo
, COL_PROTOCOL
, "Chargen");
46 col_set_str(pinfo
->cinfo
, COL_INFO
, "Chargen");
48 ti
= proto_tree_add_item(tree
, proto_chargen
, tvb
, 0, -1, ENC_NA
);
49 chargen_tree
= proto_item_add_subtree(ti
, ett_chargen
);
51 len
= tvb_reported_length(tvb
);
52 data
= tvb_get_string_enc(pinfo
->pool
, tvb
, 0, len
, ENC_ASCII
);
54 proto_tree_add_string_format(chargen_tree
, hf_chargen_data
, tvb
, 0,
55 len
, "Data", "Data (%u): %s", len
, data
);
57 /* proto_tree_add_item(chargen_tree, hf_chargen_data, tvb, 0, -1, ENC_ASCII); */
58 return tvb_captured_length(tvb
);
62 proto_register_chargen(void)
64 static hf_register_info hf
[] = {
66 "Data", "chargen.data", FT_STRING
, BASE_NONE
,
67 NULL
, 0, NULL
, HFILL
}}
74 proto_chargen
= proto_register_protocol("Character Generator Protocol", "Chargen",
76 proto_register_field_array(proto_chargen
, hf
, array_length(hf
));
77 proto_register_subtree_array(ett
, array_length(ett
));
79 chargen_handle
= register_dissector("chargen", dissect_chargen
, proto_chargen
);
83 proto_reg_handoff_chargen(void)
85 dissector_add_uint_with_preference("udp.port", CHARGEN_PORT_UDP
, chargen_handle
);
86 dissector_add_uint_with_preference("tcp.port", CHARGEN_PORT_TCP
, chargen_handle
);
90 * Editor modelines - https://www.wireshark.org/tools/modelines.html
98 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
99 * :indentSize=8:tabSize=8:noTabs=false: