epan/dissectors/packet-cvspserver.c

   1 /* packet-cvspserver.c
   2  * Routines for CVS password server packet dissection
   3  * Copyright 2018, Jaap Keuter <jaap.keuter@xs4all.nl>
   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
  16 #define CVSPSERVER_PORT_TCP 2401
  17
  18 void proto_register_cvspserver(void);
  19 void proto_reg_handoff_cvspserver(void);
  20
  21 static dissector_handle_t cvspserver_handle;
  22
  23 static int proto_cvspserver;
  24
  25 static int hf_cvspserver_data;
  26
  27 static int ett_cvspserver;
  28
  29 static int
  30 dissect_cvspserver(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* dissector_data _U_)
  31 {
  32         proto_tree* cvspserver_tree;
  33         proto_item* ti;
  34         int length;
  35         int next_offset, offset;
  36         unsigned lines = 0;
  37
  38         col_set_str(pinfo->cinfo, COL_PROTOCOL, "CVSPSERVER");
  39         col_clear(pinfo->cinfo, COL_INFO);
  40
  41         ti = proto_tree_add_item(tree, proto_cvspserver, tvb, 0, -1, ENC_NA);
  42         cvspserver_tree = proto_item_add_subtree(ti, ett_cvspserver);
  43
  44         for (offset = 0; tvb_offset_exists(tvb, offset); offset = next_offset)
  45         {
  46                 length = tvb_find_line_end_unquoted(tvb, offset, -1, &next_offset);
  47                 proto_tree_add_item(cvspserver_tree, hf_cvspserver_data, tvb, offset, length, ENC_UTF_8);
  48                 lines++;
  49         }
  50
  51         col_add_fstr(pinfo->cinfo, COL_INFO, "%s %u",
  52                      (pinfo->srcport == pinfo->match_uint) ? "Response lines:" : "Request lines :",
  53                      lines);
  54
  55         proto_item_append_text(ti, " %s",
  56                                (pinfo->srcport == pinfo->match_uint) ? "Response" : "Request");
  57
  58         return tvb_captured_length(tvb);
  59 }
  60
  61 void
  62 proto_register_cvspserver(void)
  63 {
  64         static hf_register_info hf[] = {
  65                 { &hf_cvspserver_data, {
  66                         "Data", "cvspserver.data", FT_STRING, BASE_NONE,
  67                         NULL, 0, NULL, HFILL }}
  68                 };
  69
  70         static int *ett[] = {
  71                 &ett_cvspserver
  72         };
  73
  74         proto_cvspserver = proto_register_protocol("CVS pserver", "cvspserver", "cvspserver");
  75         proto_register_field_array(proto_cvspserver, hf, array_length(hf));
  76         proto_register_subtree_array(ett, array_length(ett));
  77
  78         cvspserver_handle = register_dissector("cvspserver", dissect_cvspserver, proto_cvspserver);
  79 }
  80
  81 void
  82 proto_reg_handoff_cvspserver(void)
  83 {
  84         dissector_add_uint_with_preference("tcp.port", CVSPSERVER_PORT_TCP, cvspserver_handle);
  85 }
  86
  87 /*
  88  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  89  *
  90  * Local variables:
  91  * c-basic-offset: 8
  92  * tab-width: 8
  93  * indent-tabs-mode: t
  94  * End:
  95  *
  96  * vi: set shiftwidth=8 tabstop=8 noexpandtab:
  97  * :indentSize=8:tabSize=8:noTabs=false:
  98  */