packet-text-media.c

   1 /* packet-text-media.c\r
   2  * Routines for text-based media dissection.\r
   3  *\r
   4  * NOTE - The media type is either found in pinfo->match_string\r
   5  *        or in pinfo->provate_data.\r
   6  *\r
   7  * (C) Olivier Biot, 2004 <Olivier.Biot (ad) siemens.com>\r
   8  *\r
   9  * $Id: packet-text-media.c,v 1.2 2004/01/10 02:54:50 obiot Exp $\r
  10  *\r
  11  * Ethereal - Network traffic analyzer\r
  12  * By Gerald Combs <gerald@ethereal.com>\r
  13  * Copyright 1998 Gerald Combs\r
  14  *\r
  15  * This program is free software; you can redistribute it and/or\r
  16  * modify it under the terms of the GNU General Public License\r
  17  * as published by the Free Software Foundation; either version 2\r
  18  * of the License, or (at your option) any later version.\r
  19  *\r
  20  * This program is distributed in the hope that it will be useful,\r
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  23  * GNU General Public License for more details.\r
  24  *\r
  25  * You should have received a copy of the GNU General Public License\r
  26  * along with this program; if not, write to the Free Software\r
  27  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.\r
  28  */\r
  29 \r
  30 /* Edit this file with 4-space tabs */\r
  31 \r
  32 #ifdef HAVE_CONFIG_H\r
  33 #include "config.h"\r
  34 #endif\r
  35 \r
  36 #include <string.h>\r
  37 #include <ctype.h>\r
  38 \r
  39 #include <glib.h>\r
  40 #include <epan/packet.h>\r
  41 #include <epan/strutil.h>\r
  42 \r
  43 \r
  44 /*\r
  45  * Media dissector for line-based text media like text/plain, message/http.\r
  46  *\r
  47  * TODO - character set and chunked transfer-coding\r
  48  */\r
  49 \r
  50 /* Filterable header fields */\r
  51 static gint proto_text_lines = -1;\r
  52 \r
  53 /* Subtrees */\r
  54 static gint ett_text_lines = -1;\r
  55 \r
  56 /* Dissector handles */\r
  57 static dissector_handle_t text_lines_handle;\r
  58 \r
  59 static void\r
  60 dissect_text_lines(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)\r
  61 {\r
  62         proto_tree      *subtree;\r
  63         proto_item      *ti;\r
  64         gint            offset = 0, next_offset;\r
  65         gint            len;\r
  66         const char      *data_name;\r
  67 \r
  68         data_name = pinfo->match_string;\r
  69         if (! (data_name && data_name[0])) {\r
  70                 /*\r
  71                  * No information from "match_string"\r
  72                  */\r
  73                 data_name = (char *)(pinfo->private_data);\r
  74                 if (! (data_name && data_name[0])) {\r
  75                         /*\r
  76                          * No information from "private_data"\r
  77                          */\r
  78                         data_name = NULL;\r
  79                 }\r
  80         }\r
  81 \r
  82         if (data_name && check_col(pinfo->cinfo, COL_INFO))\r
  83                 col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", data_name);\r
  84 \r
  85         if (tree) {\r
  86                 ti = proto_tree_add_item(tree, proto_text_lines,\r
  87                                 tvb, 0, -1, FALSE);\r
  88                 if (data_name)\r
  89                         proto_item_append_text(ti, ": %s", data_name);\r
  90                 subtree = proto_item_add_subtree(ti, ett_text_lines);\r
  91                 /* Read the media line by line */\r
  92                 while (tvb_reported_length_remaining(tvb, offset) != 0) {\r
  93                         len = tvb_find_line_end(tvb, offset,\r
  94                                         tvb_ensure_length_remaining(tvb, offset),\r
  95                                         &next_offset, FALSE);\r
  96                         if (len == -1)\r
  97                                 break;\r
  98                         proto_tree_add_text(subtree, tvb, offset, next_offset - offset,\r
  99                                         "%s", tvb_format_text(tvb, offset, len));\r
 100                         offset = next_offset;\r
 101                 }\r
 102         }\r
 103 }\r
 104 \r
 105 void\r
 106 proto_register_text_lines(void)\r
 107 {\r
 108         static gint *ett[] = {\r
 109                 &ett_text_lines,\r
 110         };\r
 111 \r
 112         proto_register_subtree_array(ett, array_length(ett));\r
 113 \r
 114         proto_text_lines = proto_register_protocol(\r
 115                         "Line-based text data", /* Long name */\r
 116                         "Line-based text data", /* Short name */\r
 117                         "data-text-lines");             /* Filter name */\r
 118         register_dissector("data-text-lines", dissect_text_lines, proto_text_lines);\r
 119 }\r
 120 \r
 121 void\r
 122 proto_reg_handoff_text_lines(void)\r
 123 {\r
 124         text_lines_handle = create_dissector_handle(\r
 125                                         dissect_text_lines, proto_text_lines);\r
 126 \r
 127         dissector_add_string("media_type", "text/plain", text_lines_handle);\r
 128         /* W3C line-based textual media */\r
 129         dissector_add_string("media_type", "text/html", text_lines_handle);\r
 130         dissector_add_string("media_type", "text/css", text_lines_handle);\r
 131         dissector_add_string("media_type", "application/xml", text_lines_handle);\r
 132         dissector_add_string("media_type", "application/x-javascript", text_lines_handle);\r
 133         dissector_add_string("media_type", "application/x-www-form-urlencoded", text_lines_handle);\r
 134         dissector_add_string("media_type", "application/x-ns-proxy-autoconfig", text_lines_handle);\r
 135         /* WAP line-based textual media */\r
 136         dissector_add_string("media_type", "text/vnd.wap.wml", text_lines_handle);\r
 137         dissector_add_string("media_type", "text/vnd.wap.si", text_lines_handle);\r
 138         dissector_add_string("media_type", "text/vnd.wap.sl", text_lines_handle);\r
 139         dissector_add_string("media_type", "text/vnd.wap.co", text_lines_handle);\r
 140         dissector_add_string("media_type", "text/vnd.wap.emn", text_lines_handle);\r
 141         /* Other */\r
 142         dissector_add_string("media_type", "text/vnd.sun.j2me.app-descriptor", text_lines_handle);\r
 143 }\r