forked from osmocom/wireshark
492 lines
15 KiB
C
492 lines
15 KiB
C
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/* packet-kafka.c
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* Routines for Kafka Protocol dissection (version 0.8 and later)
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* Copyright 2013, Evan Huus <eapache@gmail.com>
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*
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* https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol
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*
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* $Id$
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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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/dissectors/packet-tcp.h>
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#include <epan/conversation.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/wmem/wmem.h>
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void proto_reg_handoff_kafka(void);
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static int proto_kafka = -1;
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static int hf_kafka_len = -1;
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static int hf_kafka_request_api_key = -1;
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static int hf_kafka_response_api_key = -1;
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static int hf_kafka_request_api_version = -1;
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static int hf_kafka_correlation_id = -1;
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static int hf_kafka_client_id = -1;
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static int hf_kafka_string_len = -1;
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static int hf_kafka_array_count = -1;
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static int hf_kafka_required_acks = -1;
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static int hf_kafka_timeout = -1;
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static int hf_kafka_topic_name = -1;
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static int hf_kafka_partition_id = -1;
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static int hf_kafka_message_set_size = -1;
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static int hf_kafka_request_frame = -1;
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static int hf_kafka_response_frame = -1;
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static gint ett_kafka = -1;
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static gint ett_kafka_request_topic = -1;
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static gint ett_kafka_request_partition = -1;
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static gint ett_kafka_response_topic = -1;
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static gint ett_kafka_response_partition = -1;
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static guint kafka_port = 0;
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#define KAFKA_PRODUCE 0
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#define KAFKA_FETCH 1
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#define KAFKA_OFFSET 2
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#define KAFKA_METADATA 3
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#define KAFKA_LEADER_ISR 4
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#define KAFKA_STOP_REPLICA 5
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#define KAFKA_OFFSET_COMMIT 6
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#define KAFKA_OFFSET_FETCH 7
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static const value_string kafka_apis[] = {
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{ KAFKA_PRODUCE, "Produce" },
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{ KAFKA_FETCH, "Fetch" },
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{ KAFKA_OFFSET, "Offset" },
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{ KAFKA_METADATA, "Metadata" },
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{ KAFKA_LEADER_ISR, "Leader and ISR" },
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{ KAFKA_STOP_REPLICA, "Stop Replica" },
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{ KAFKA_OFFSET_COMMIT, "Offset Commit" },
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{ KAFKA_OFFSET_FETCH, "Offset Fetch" },
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{ 0, NULL }
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};
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typedef struct _kafka_query_response_t {
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gint16 api_key;
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guint32 request_frame;
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guint32 response_frame;
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gboolean response_found;
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} kafka_query_response_t;
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static guint
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get_kafka_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
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{
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return 4 + tvb_get_ntohl(tvb, offset);
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}
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static int
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dissect_kafka_array(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, int offset, int(*func)(tvbuff_t*, packet_info*, proto_tree*, int))
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{
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gint32 count, i;
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count = (gint32) tvb_get_ntohl(tvb, offset);
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proto_tree_add_item(tree, hf_kafka_array_count, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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for (i=0; i<count; i++) {
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offset = func(tvb, pinfo, tree, offset);
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}
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return offset;
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}
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static int
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dissect_kafka_string(proto_tree *tree, int hf_item, tvbuff_t *tvb, packet_info *pinfo _U_, int offset)
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{
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gint16 len;
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len = (gint16) tvb_get_ntohs(tvb, offset);
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proto_tree_add_item(tree, hf_kafka_string_len, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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if (len < -1) {
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/* TODO expert info */
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}
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else if (len == -1) {
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proto_tree_add_string(tree, hf_item, tvb, offset, 0, NULL);
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}
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else {
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proto_tree_add_item(tree, hf_item, tvb, offset, len, ENC_BIG_ENDIAN);
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offset += len;
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}
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return offset;
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}
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static int
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dissect_kafka_produce_request_partition(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset)
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{
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proto_item *ti;
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proto_tree *subtree;
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ti = proto_tree_add_text(tree, tvb, offset, 14, "Produce Request Partition");
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subtree = proto_item_add_subtree(ti, ett_kafka_request_partition);
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proto_tree_add_item(subtree, hf_kafka_partition_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(subtree, hf_kafka_message_set_size, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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return offset;
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}
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static int
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dissect_kafka_produce_request_topic(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int start_offset)
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{
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proto_item *ti;
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proto_tree *subtree;
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int offset = start_offset;
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ti = proto_tree_add_text(tree, tvb, offset, -1, "Produce Request Topic");
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subtree = proto_item_add_subtree(ti, ett_kafka_request_topic);
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offset = dissect_kafka_string(subtree, hf_kafka_topic_name, tvb, pinfo, offset);
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offset = dissect_kafka_array(subtree, tvb, pinfo, offset, &dissect_kafka_produce_request_partition);
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proto_item_set_len(ti, offset - start_offset);
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return offset;
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}
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static int
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dissect_kafka_produce_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
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{
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proto_tree_add_item(tree, hf_kafka_required_acks, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(tree, hf_kafka_timeout, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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offset = dissect_kafka_array(tree, tvb, pinfo, offset, &dissect_kafka_produce_request_topic);
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return offset;
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}
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static int
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dissect_kafka_produce_response_partition(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int offset)
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{
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proto_item *ti;
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proto_tree *subtree;
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ti = proto_tree_add_text(tree, tvb, offset, 14, "Produce Response Partition");
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subtree = proto_item_add_subtree(ti, ett_kafka_response_partition);
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proto_tree_add_item(subtree, hf_kafka_partition_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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/* TODO */
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return offset + 10;
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}
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static int
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dissect_kafka_produce_response_topic(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int start_offset)
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{
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proto_item *ti;
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proto_tree *subtree;
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int offset = start_offset;
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ti = proto_tree_add_text(tree, tvb, offset, -1, "Produce Response Topic");
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subtree = proto_item_add_subtree(ti, ett_kafka_response_topic);
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offset = dissect_kafka_string(subtree, hf_kafka_topic_name, tvb, pinfo, offset);
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offset = dissect_kafka_array(subtree, tvb, pinfo, offset, &dissect_kafka_produce_response_partition);
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proto_item_set_len(ti, offset - start_offset);
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return offset;
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}
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static int
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dissect_kafka_produce_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
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{
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return dissect_kafka_array(tree, tvb, pinfo, offset, &dissect_kafka_produce_response_topic);
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}
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static void
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dissect_kafka(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *kafka_tree;
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int offset = 0;
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kafka_query_response_t *matcher = NULL;
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conversation_t *conversation;
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wmem_queue_t *match_queue;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Kafka");
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col_clear(pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item(tree, proto_kafka, tvb, 0, -1, ENC_NA);
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kafka_tree = proto_item_add_subtree(ti, ett_kafka);
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proto_tree_add_item(kafka_tree, hf_kafka_len, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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conversation = find_or_create_conversation(pinfo);
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match_queue = (wmem_queue_t *) conversation_get_proto_data(conversation, proto_kafka);
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if (match_queue == NULL) {
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match_queue = wmem_queue_new(wmem_file_scope());
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conversation_add_proto_data(conversation, proto_kafka, match_queue);
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}
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if (PINFO_FD_VISITED(pinfo)) {
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matcher = (kafka_query_response_t *) p_get_proto_data(pinfo->fd, proto_kafka, 0);
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}
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if (pinfo->destport == kafka_port) {
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/* Request */
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if (matcher == NULL) {
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matcher = wmem_new(wmem_file_scope(), kafka_query_response_t);
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matcher->api_key = tvb_get_ntohs(tvb, offset);
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matcher->request_frame = PINFO_FD_NUM(pinfo);
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matcher->response_found = FALSE;
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p_add_proto_data(pinfo->fd, proto_kafka, 0, matcher);
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wmem_queue_push(match_queue, matcher);
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}
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col_add_fstr(pinfo->cinfo, COL_INFO, "Kafka %s Request",
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val_to_str_const(matcher->api_key, kafka_apis, "Unknown"));
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if (matcher->response_found) {
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ti = proto_tree_add_uint(kafka_tree, hf_kafka_response_frame, tvb,
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0, 0, matcher->response_frame);
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PROTO_ITEM_SET_GENERATED(ti);
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}
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proto_tree_add_item(kafka_tree, hf_kafka_request_api_key, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(kafka_tree, hf_kafka_request_api_version, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(kafka_tree, hf_kafka_correlation_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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offset = dissect_kafka_string(kafka_tree, hf_kafka_client_id, tvb, pinfo, offset);
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switch (matcher->api_key) {
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/* TODO: decode other request types */
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case KAFKA_PRODUCE:
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offset = dissect_kafka_produce_request(tvb, pinfo, kafka_tree, offset);
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break;
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}
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}
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else {
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/* Response */
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proto_tree_add_item(kafka_tree, hf_kafka_correlation_id, tvb, offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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if (matcher == NULL) {
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if (wmem_queue_count(match_queue) == 0) {
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col_set_str(pinfo->cinfo, COL_INFO, "Kafka Response (Unknown API, Missing Request)");
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/* TODO: expert info, don't have request, can't dissect */
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return;
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}
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matcher = (kafka_query_response_t *) wmem_queue_pop(match_queue);
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matcher->response_frame = PINFO_FD_NUM(pinfo);
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matcher->response_found = TRUE;
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p_add_proto_data(pinfo->fd, proto_kafka, 0, matcher);
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}
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col_add_fstr(pinfo->cinfo, COL_INFO, "Kafka %s Response",
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val_to_str_const(matcher->api_key, kafka_apis, "Unknown"));
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ti = proto_tree_add_uint(kafka_tree, hf_kafka_request_frame, tvb,
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0, 0, matcher->request_frame);
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PROTO_ITEM_SET_GENERATED(ti);
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ti = proto_tree_add_int(kafka_tree, hf_kafka_response_api_key, tvb,
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0, 0, matcher->api_key);
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PROTO_ITEM_SET_GENERATED(ti);
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switch (matcher->api_key) {
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/* TODO: decode other response types */
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case KAFKA_PRODUCE:
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offset = dissect_kafka_produce_response(tvb, pinfo, kafka_tree, offset);
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break;
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}
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}
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}
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static int
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dissect_kafka_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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void *data _U_)
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{
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tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 4,
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get_kafka_pdu_len, dissect_kafka);
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return tvb_length(tvb);
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}
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void
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proto_register_kafka(void)
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{
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module_t *kafka_module;
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static hf_register_info hf[] = {
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{ &hf_kafka_len,
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{ "Length", "kafka.len",
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FT_INT32, BASE_DEC, 0, 0,
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"The length of this Kafka packet.", HFILL }
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},
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{ &hf_kafka_request_api_key,
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{ "API Key", "kafka.request_key",
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FT_INT16, BASE_DEC, VALS(kafka_apis), 0,
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"Request API.", HFILL }
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},
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{ &hf_kafka_response_api_key,
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{ "API Key", "kafka.response_key",
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FT_INT16, BASE_DEC, VALS(kafka_apis), 0,
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"Response API.", HFILL }
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},
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{ &hf_kafka_request_api_version,
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{ "API Version", "kafka.version",
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FT_INT16, BASE_DEC, 0, 0,
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"Request API Version.", HFILL }
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},
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{ &hf_kafka_correlation_id,
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{ "Correlation ID", "kafka.correlation_id",
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FT_INT32, BASE_DEC, 0, 0,
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NULL, HFILL }
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},
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{ &hf_kafka_client_id,
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{ "Client ID", "kafka.client_id",
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FT_STRING, BASE_NONE, 0, 0,
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"The ID of the sending client.", HFILL }
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},
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{ &hf_kafka_string_len,
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{ "String Length", "kafka.string_len",
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FT_INT16, BASE_DEC, 0, 0,
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|
"Generic length for kafka-encoded string.", HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_array_count,
|
||
|
{ "Array Count", "kafka.array_count",
|
||
|
FT_INT32, BASE_DEC, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_required_acks,
|
||
|
{ "Required Acks", "kafka.required_acks",
|
||
|
FT_INT16, BASE_DEC, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_timeout,
|
||
|
{ "Timeout", "kafka.timeout",
|
||
|
FT_INT32, BASE_DEC, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_topic_name,
|
||
|
{ "Topic Name", "kafka.topic_name",
|
||
|
FT_STRING, BASE_NONE, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_partition_id,
|
||
|
{ "Partition ID", "kafka.partition_id",
|
||
|
FT_INT32, BASE_DEC, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_message_set_size,
|
||
|
{ "Message Set Size", "kafka.message_set_size",
|
||
|
FT_INT32, BASE_DEC, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_request_frame,
|
||
|
{ "Request Frame", "kafka.request_frame",
|
||
|
FT_FRAMENUM, BASE_NONE, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
},
|
||
|
{ &hf_kafka_response_frame,
|
||
|
{ "Response Frame", "kafka.reponse_frame",
|
||
|
FT_FRAMENUM, BASE_NONE, 0, 0,
|
||
|
NULL, HFILL }
|
||
|
}
|
||
|
};
|
||
|
|
||
|
static gint *ett[] = {
|
||
|
&ett_kafka,
|
||
|
&ett_kafka_request_topic,
|
||
|
&ett_kafka_request_partition,
|
||
|
&ett_kafka_response_topic,
|
||
|
&ett_kafka_response_partition
|
||
|
};
|
||
|
|
||
|
proto_kafka = proto_register_protocol("Kafka",
|
||
|
"Kafka", "kafka");
|
||
|
|
||
|
proto_register_field_array(proto_kafka, hf, array_length(hf));
|
||
|
proto_register_subtree_array(ett, array_length(ett));
|
||
|
|
||
|
kafka_module = prefs_register_protocol(proto_kafka,
|
||
|
proto_reg_handoff_kafka);
|
||
|
|
||
|
/* Register an example port preference */
|
||
|
prefs_register_uint_preference(kafka_module, "tcp.port", "Broker TCP Port",
|
||
|
"Kafka broker's TCP port",
|
||
|
10, &kafka_port);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
proto_reg_handoff_kafka(void)
|
||
|
{
|
||
|
static gboolean initialized = FALSE;
|
||
|
static dissector_handle_t kafka_handle;
|
||
|
static int currentPort;
|
||
|
|
||
|
if (!initialized) {
|
||
|
kafka_handle = new_create_dissector_handle(dissect_kafka_tcp,
|
||
|
proto_kafka);
|
||
|
initialized = TRUE;
|
||
|
|
||
|
} else {
|
||
|
dissector_delete_uint("tcp.port", currentPort, kafka_handle);
|
||
|
}
|
||
|
|
||
|
currentPort = kafka_port;
|
||
|
|
||
|
dissector_add_uint("tcp.port", currentPort, kafka_handle);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
||
|
*
|
||
|
* Local variables:
|
||
|
* c-basic-offset: 4
|
||
|
* tab-width: 8
|
||
|
* indent-tabs-mode: nil
|
||
|
* End:
|
||
|
*
|
||
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
||
|
* :indentSize=4:tabSize=8:noTabs=true:
|
||
|
*/
|