plugins/tpg/packet-http.c

   1 /* packet-http.c
   2  *
   3  * $Id$
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <epan/wmem/wmem.h>
  27
  28 #include "http-parser.h"
  29 #include <gmodule.h>
  30
  31 static const value_string http_response_codes[] = {
  32     { 200, "OK" },
  33     { 302, "Later" },
  34     { 0,   NULL }
  35 };
  36
  37 static gint ett_http = -1;
  38 static int proto_http = -1;
  39
  40 static int hf_http_is_response = -1;
  41 static int hf_http_request_method = -1;
  42 static int hf_http_response_code = -1;
  43 static int hf_http_transfer_encoding = -1;
  44 static int hf_http_content_length = -1;
  45 static int hf_http_media = -1;
  46 static int hf_http_host = -1;
  47 static int hf_http_request_uri = -1;
  48
  49 static dissector_handle_t http_handle;
  50
  51 static void dissect_http(tvbuff_t* tvb, packet_info* pinfo _U_, proto_tree* tree) {
  52     http_info_value_t* msgdata = wmem_alloc0(wmem_packet_scope(), sizeof(http_info_value_t));
  53     tvbparse_elem_t* reqresp;
  54     tpg_parser_data_t* tpg;
  55     proto_item* pi = proto_tree_add_item(tree,proto_http,tvb,0,-1,ENC_NA);
  56     proto_tree* pt = proto_item_add_subtree(pi,ett_http);
  57
  58     tpg = tpg_start(pt,tvb,0,-1,http_tpg_data.wanted_http_sp, msgdata);
  59
  60     if (( reqresp = TPG_GET(tpg,http_tpg_data.wanted_http_req_resp) )) {
  61         tvbparse_elem_t* hdr;
  62
  63         while(( hdr = TPG_GET(tpg,http_tpg_data.wanted_http_header) ))
  64             ;
  65
  66         if ( TPG_GET(tpg,http_tpg_data.wanted_http_crlf) ) {
  67             pi = proto_tree_add_boolean(pt,hf_http_is_response,tvb,0,0,msgdata->is_response);
  68             pt = proto_item_add_subtree(pi,ett_http);
  69
  70
  71             if (msgdata->is_response) {
  72                 proto_tree_add_uint(pt,hf_http_response_code,tvb,0,0,msgdata->response_code);
  73                 proto_tree_add_uint(pt,hf_http_content_length,tvb,0,0,msgdata->content_length);
  74                 if (msgdata->transfer_encoding) proto_tree_add_string(pt,hf_http_transfer_encoding,tvb,0,0,msgdata->transfer_encoding);
  75                 if (msgdata->media) proto_tree_add_string(pt,hf_http_media,tvb,0,0,msgdata->media);
  76             } else {
  77                 if (msgdata->request_method) proto_tree_add_string(pt,hf_http_request_method,tvb,0,0,msgdata->request_method);
  78                 if (msgdata->http_host) proto_tree_add_string(pt,hf_http_host,tvb,0,0,msgdata->http_host);
  79                 if (msgdata->request_uri) proto_tree_add_string(pt,hf_http_request_uri,tvb,0,0,msgdata->request_uri);
  80             }
  81
  82     } else {
  83             /* header fragment */
  84         }
  85     } else {
  86         /* no header  */
  87         return;
  88     }
  89 }
  90
  91 static void proto_register_http(void) {
  92     static hf_register_info hf[] = {
  93         HF_HTTP_PARSER,
  94         { &hf_http_is_response, { "=Is Response", "hyttp.info.is_response", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "", HFILL }},
  95         { &hf_http_request_method, { "=Method", "hyttp.info.method", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
  96         { &hf_http_response_code, { "=Response Code", "hyttp.info.response.code", FT_UINT32, BASE_DEC, VALS( http_response_codes ), 0x0, "", HFILL }},
  97         { &hf_http_transfer_encoding, { "=Transfer-Encoding", "hyttp.info.transfer_encoding", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
  98         { &hf_http_content_length, { "=Content-Length", "hyttp.info.content_length", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
  99         { &hf_http_request_uri, { "=Request URI", "hyttp.info.uri", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
 100         { &hf_http_media, { "=Media", "hyttp.info.media", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }},
 101         { &hf_http_host, { "=Host", "hyttp.info.host", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }}
 102     };
 103
 104     gint *ett[] = {
 105         ETT_HTTP_PARSER,
 106         &ett_http
 107     };
 108
 109     tpg_http_init();
 110
 111     proto_http = proto_register_protocol("HyTTP", "HyTTP", "hyttp");
 112     proto_register_field_array(proto_http, hf, array_length(hf));
 113     proto_register_subtree_array(ett, array_length(ett));
 114 }
 115
 116
 117 static void proto_reg_handoff_http(void) {
 118     http_handle = create_dissector_handle(dissect_http, proto_http);
 119
 120     dissector_delete_uint("tcp.port", 80, NULL);
 121     dissector_add_uint("tcp.port", 80, http_handle);
 122
 123 }
 124
 125 #ifndef ENABLE_STATIC
 126
 127 WS_DLL_PUBLIC_DEF const gchar version[] = "0.0.0";
 128
 129 WS_DLL_PUBLIC_DEF void
 130 plugin_register(void)
 131 {
 132     /* register the new protocol, protocol fields, and subtrees */
 133     if (proto_http == -1) { /* execute protocol initialization only once */
 134         proto_register_http();
 135     }
 136 }
 137
 138 WS_DLL_PUBLIC_DEF void
 139 plugin_reg_handoff(void){
 140     proto_reg_handoff_http();
 141 }
 142
 143 #endif
 144