mirror of
https://github.com/ChronosX88/FreePastry.git
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397 lines
11 KiB
C
397 lines
11 KiB
C
/* packet-scribe.c
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* Routines for Scribe
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* Copyright 2007, David Dugoujon <david.dugoujon@yahoo.fr>
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*
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <gmodule.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/prefs.h>
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#include "packet-scribe.h"
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#include "packet-freepastry.h"
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static int proto_scribe = -1;
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static int hf_scribe_type = -1;
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static int hf_scribe_version = -1;
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static int hf_scribe_has_source = -1;
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static int hf_scribe_has_content = -1;
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static int hf_scribe_content_type = -1;
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static int hf_scribe_content = -1;
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static int hf_scribe_to_visit_len = -1;
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static int hf_scribe_visited_len = -1;
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static int hf_scribe_id = -1;
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static int hf_scribe_has_previous_parent = -1;
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static int hf_scribe_previous_parent_type = -1;
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static int hf_scribe_previous_parent = -1;
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static int hf_scribe_path_len = -1;
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static int hf_scribe_path_type = -1;
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static int hf_scribe_path = -1;
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static gint ett_scribe = -1;
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static dissector_handle_t scribe_handle;
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static const value_string scribe_msg_type[] = {
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{ SCRIBE_ANYCAST_MSG, "Anycast"},
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{ SCRIBE_SUBSCRIBE_MSG, "Subscribe"},
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{ SCRIBE_SUBSCRIBE_ACK_MSG, "Subscribe Ack"},
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{ SCRIBE_SUBSCRIBE_FAILED_MSG, "Subscribe Failed"},
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{ SCRIBE_DROP_MSG, "Drop"},
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{ SCRIBE_PUBLISH_MSG, "Publish"},
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{ SCRIBE_PUBLISH_REQUEST_MSG, "Publish Request"},
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{ SCRIBE_UNSUBSCRIBE_MSG, "Unsubscribe"},
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{ 0, NULL }
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};
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void
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decode_content(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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gint payload_len;
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proto_tree_add_item(tree, hf_scribe_content_type, tvb, offset, 2, FALSE);
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offset += 2;
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payload_len = tvb_reported_length_remaining(tvb, offset);
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proto_tree_add_text(tree, tvb, offset, payload_len,
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"Payload (%u byte%s)", payload_len,
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plurality(payload_len, "", "s"));
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}
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gint
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decode_visit(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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guint32 to_visit_len;
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guint32 visited_len;
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guint32 i;
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to_visit_len = tvb_get_ntohl(tvb, offset);
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proto_tree_add_uint(tree, hf_scribe_to_visit_len, tvb, offset, 4, to_visit_len);
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offset += 4;
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for (i = 0; i < to_visit_len; ++i){
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offset = decode_nodehandle(tvb, tree, offset, ep_strdup_printf("NodeHandle to visit #%d", i+1));
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if (offset == -1){
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return -1;
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}
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}/*end for each to_visit*/
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visited_len = tvb_get_ntohl(tvb, offset);
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proto_tree_add_uint(tree, hf_scribe_visited_len, tvb, offset, 4, visited_len);
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offset += 4;
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for (i = 0; i < visited_len; ++i){
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offset = decode_nodehandle(tvb, tree, offset, ep_strdup_printf("Visited NodeHandle #%d", i+1));
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if (offset == -1){
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return -1;
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}
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}/*end for each visited*/
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return offset;
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}
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void
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decode_anycast(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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if (tree){
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gboolean has_content = FALSE;
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/*visit*/
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offset = decode_visit(tvb, tree, offset);
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if (offset == -1){
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return;
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}
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/*has content?*/
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if (tvb_get_guint8(tvb, offset) != 0){
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has_content = TRUE;
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}
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proto_tree_add_boolean(tree, hf_scribe_has_content, tvb, offset, 1, has_content);
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offset++;
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if (has_content){
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decode_content(tvb, tree, offset);
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}
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}
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}
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void
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decode_subscribe(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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if (tree){
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gboolean has_content = FALSE;
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gboolean has_previous_parent = FALSE;
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/*visit*/
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offset = decode_visit(tvb, tree, offset);
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if (offset == -1){
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return;
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}
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/*has content?*/
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if (tvb_get_guint8(tvb, offset) != 0){
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has_content = TRUE;
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}
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proto_tree_add_boolean(tree, hf_scribe_has_content, tvb, offset, 1, has_content);
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offset++;
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if (has_content){
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decode_content(tvb, tree, offset);
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} else {
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proto_tree_add_item(tree, hf_scribe_id, tvb, offset, 4, FALSE);
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offset += 4;
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/*has previous parent?*/
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if (tvb_get_guint8(tvb, offset) != 0){
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has_previous_parent = TRUE;
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}
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proto_tree_add_boolean(tree, hf_scribe_has_previous_parent, tvb, offset, 1, has_previous_parent);
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offset++;
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if (has_previous_parent){
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proto_tree_add_item(tree, hf_scribe_previous_parent_type, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_string(tree, hf_scribe_previous_parent, tvb, offset, 20, get_id_full(tvb, offset));
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offset +=20;
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}
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decode_nodehandle(tvb, tree, offset, "Subscriber");
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}
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}
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}
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void
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decode_scribe_subscribe_ack(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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if (tree){
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guint32 path_len;
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guint32 i;
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proto_tree_add_item(tree, hf_scribe_id, tvb, offset, 4, FALSE);
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offset += 4;
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path_len = tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(tree, hf_scribe_path_len, tvb, offset, 4, FALSE);
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offset += 4;
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for (i = 0; i < path_len; ++i){
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if (tvb_reported_length_remaining(tvb, offset) < 20){
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proto_tree_add_text(tree, tvb, offset, -1, "Malformed Scribe message!");
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return;
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}
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proto_tree_add_item(tree, hf_scribe_path_type, tvb, offset, 2, FALSE);
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offset += 2;
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proto_tree_add_string(tree, hf_scribe_path, tvb, offset, 20, get_id_full(tvb, offset));
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offset += 20;
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}
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}
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}
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void
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decode_scribe_failed(tvbuff_t *tvb, proto_tree *tree, gint offset)
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{
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if (tree){
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proto_tree_add_item(tree, hf_scribe_id, tvb, offset, 4, FALSE);
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offset += 4;
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}
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}
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static void
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dissect_scribe(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti = NULL;
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proto_tree *scribe_tree = NULL;
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const gchar *type_string = NULL;
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guint16 type;
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gboolean has_source = FALSE;
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gint offset = 0;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Scribe");
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type = tvb_get_ntohs(tvb, offset);
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type_string = val_to_str(type, scribe_msg_type, "<Unknown type %d>");
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if (check_col(pinfo->cinfo, COL_INFO)){
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col_clear (pinfo->cinfo, COL_INFO);
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col_add_fstr(pinfo->cinfo, COL_INFO, "%d > %d %s",
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pinfo->srcport, pinfo->destport, type_string);
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}
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/*has source?*/
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if (tvb_get_guint8(tvb, offset+3) != 0){
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has_source = TRUE;
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}
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if (tree){
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ti = proto_tree_add_item(tree, proto_scribe, tvb, 0, -1, FALSE);
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scribe_tree = proto_item_add_subtree(ti, ett_scribe);
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proto_tree_add_item(scribe_tree, hf_scribe_type, tvb, offset, 2, FALSE);
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proto_tree_add_item(scribe_tree, hf_scribe_version, tvb, offset + 2, 1, FALSE);
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proto_tree_add_boolean(scribe_tree, hf_scribe_has_source, tvb, offset + 3, 1, has_source);
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if (has_source){
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offset = decode_nodehandle(tvb, scribe_tree, offset + 4 , "Source");
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}
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} else {
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if (has_source){
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offset = get_node_handle_len(tvb, offset + 3);
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}
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}
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if (offset == -1){
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return;
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}
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if(check_col(pinfo->cinfo,COL_INFO)){
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print_id_into_col_info(tvb, pinfo, offset, "Topic");
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}
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if (tree){
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offset = decode_type_and_id(tvb, scribe_tree, offset);
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if (offset == -1){
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return;
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}
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switch (type){
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case SCRIBE_ANYCAST_MSG:
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decode_anycast(tvb, scribe_tree, offset);
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break;
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case SCRIBE_SUBSCRIBE_MSG:
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decode_subscribe(tvb, scribe_tree, offset);
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break;
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case SCRIBE_SUBSCRIBE_ACK_MSG:
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decode_scribe_subscribe_ack(tvb, scribe_tree, offset);
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break;
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case SCRIBE_SUBSCRIBE_FAILED_MSG:
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decode_scribe_failed(tvb, scribe_tree, offset);
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break;
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case SCRIBE_PUBLISH_MSG:
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case SCRIBE_PUBLISH_REQUEST_MSG:
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decode_content(tvb, scribe_tree, offset);
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break;
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case SCRIBE_DROP_MSG:
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case SCRIBE_UNSUBSCRIBE_MSG:
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default:
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return;/*stop dissection*/
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}
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}
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}
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void
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proto_register_scribe(void)
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{
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static hf_register_info hf[] = {
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{ &hf_scribe_type,
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{ "Type", "scribe.type",
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FT_UINT16, BASE_DEC, VALS(scribe_msg_type), 0x0,
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"", HFILL }},
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{ &hf_scribe_version,
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{ "Version", "scribe.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_has_source,
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{ "Has source", "scribe.has_source",
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FT_BOOLEAN, 8, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_has_content,
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{ "Has content", "scribe.has_content",
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FT_BOOLEAN, 8, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_content_type,
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{ "Content type", "scribe.content.type",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_content,
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{ "Payload", "scribe.content.value",
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FT_BYTES, BASE_HEX, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_to_visit_len,
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{ "Number of nodes to visit", "scribe.tovisit.len",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_visited_len,
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{ "Number of visited nodes", "scribe.visited.len",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_id,
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{ "Request ID", "scribe.id",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_has_previous_parent,
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{ "Has previous parent", "scribe.has_previous_parent",
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FT_BOOLEAN, 8, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_previous_parent_type,
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{ "Path type", "scribe.previous_parent.type",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_previous_parent,
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{ "Previous parent", "scribe.previous_parent.value",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_path_len,
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{ "Lengh of path", "scribe.length_of_path",
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FT_UINT32, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_path_type,
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{ "Path type", "scribe.path.type",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }},
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{ &hf_scribe_path,
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{ "Path", "scribe.path.value",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"", HFILL }},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_scribe
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};
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module_t *scribe_module;
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if (proto_scribe == -1) {
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proto_scribe = proto_register_protocol (
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"Scribe (Common API Application)", /* name */
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"Scribe", /* short name */
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"scribe" /* abbrev */
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);
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}
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scribe_module = prefs_register_protocol(proto_scribe, NULL);
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proto_register_field_array(proto_scribe, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_scribe(void)
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{
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static int Initialized=FALSE;
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if (!Initialized) {
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scribe_handle = create_dissector_handle(dissect_scribe, proto_scribe);
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dissector_add("commonapi.app", SCRIBE_SUB_ADDRESS, scribe_handle);
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}
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}
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