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rdkafka_mock_handlers.c
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/*
* librdkafka - Apache Kafka C library
*
* Copyright (c) 2019-2022, Magnus Edenhill,
* 2023, Confluent Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Mocks - protocol request handlers
*
*/
#include "rdkafka_int.h"
#include "rdbuf.h"
#include "rdrand.h"
#include "rdkafka_interceptor.h"
#include "rdkafka_mock_int.h"
#include "rdkafka_transport_int.h"
#include "rdkafka_offset.h"
#include "rdkafka_telemetry_decode.h"
void rd_kafka_mock_Produce_reply_tags_partition_write(
rd_kafka_buf_t *rkbuf,
int tagtype,
rd_kafka_mock_partition_t *mpart) {
switch (tagtype) {
case 0: /* CurrentLeader */
/* Leader id */
rd_kafka_buf_write_i32(rkbuf, mpart->leader->id);
/* Leader epoch */
rd_kafka_buf_write_i32(rkbuf, mpart->leader_epoch);
/* Field tags */
rd_kafka_buf_write_tags_empty(rkbuf);
break;
default:
break;
}
}
void rd_kafka_mock_Produce_reply_tags_write(
rd_kafka_buf_t *rkbuf,
int tagtype,
rd_kafka_mock_broker_t **changed_leaders,
int changed_leader_cnt) {
int i;
switch (tagtype) {
case 0: /* NodeEndpoints */
/* #NodeEndpoints */
rd_kafka_buf_write_arraycnt(rkbuf, changed_leader_cnt);
for (i = 0; i < changed_leader_cnt; i++) {
rd_kafka_mock_broker_t *changed_leader =
changed_leaders[i];
/* Leader id */
rd_kafka_buf_write_i32(rkbuf, changed_leader->id);
/* Leader Hostname */
rd_kafka_buf_write_str(
rkbuf, changed_leader->advertised_listener, -1);
/* Leader Port number */
rd_kafka_buf_write_i32(rkbuf,
(int32_t)changed_leader->port);
/* Leader Rack */
rd_kafka_buf_write_str(rkbuf, changed_leader->rack, -1);
/* Field tags */
rd_kafka_buf_write_tags_empty(rkbuf);
}
default:
break;
}
}
/**
* @brief Handle ProduceRequest
*/
static int rd_kafka_mock_handle_Produce(rd_kafka_mock_connection_t *mconn,
rd_kafka_buf_t *rkbuf) {
const rd_bool_t log_decode_errors = rd_true;
rd_kafka_mock_cluster_t *mcluster = mconn->broker->cluster;
rd_kafka_buf_t *resp = rd_kafka_mock_buf_new_response(rkbuf);
int32_t TopicsCnt;
rd_kafkap_str_t TransactionalId = RD_KAFKAP_STR_INITIALIZER;
int16_t Acks;
int32_t TimeoutMs;
rd_kafka_resp_err_t all_err;
int32_t tags_to_write[1] = {0};
size_t tags_to_write_cnt = 0;
int changed_leaders_cnt = 0;
rd_kafka_mock_broker_t **changed_leaders =
rd_calloc(mcluster->broker_cnt, sizeof(*changed_leaders));
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 3)
rd_kafka_buf_read_str(rkbuf, &TransactionalId);
rd_kafka_buf_read_i16(rkbuf, &Acks);
rd_kafka_buf_read_i32(rkbuf, &TimeoutMs);
/* #Topics */
rd_kafka_buf_read_arraycnt(rkbuf, &TopicsCnt, RD_KAFKAP_TOPICS_MAX);
/* Response: #Topics */
rd_kafka_buf_write_arraycnt(resp, TopicsCnt);
/* Inject error, if any */
all_err = rd_kafka_mock_next_request_error(mconn, resp);
while (TopicsCnt-- > 0) {
rd_kafkap_str_t Topic;
int32_t PartitionCnt;
rd_kafka_mock_topic_t *mtopic;
rd_kafka_buf_read_str(rkbuf, &Topic);
rd_kafka_buf_read_arraycnt(rkbuf, &PartitionCnt,
RD_KAFKAP_PARTITIONS_MAX);
mtopic = rd_kafka_mock_topic_find_by_kstr(mcluster, &Topic);
/* Response: Topic */
rd_kafka_buf_write_kstr(resp, &Topic);
/* Response: #Partitions */
rd_kafka_buf_write_arraycnt(resp, PartitionCnt);
while (PartitionCnt-- > 0) {
int32_t Partition;
rd_kafka_mock_partition_t *mpart = NULL;
rd_kafkap_bytes_t records;
rd_kafka_resp_err_t err = RD_KAFKA_RESP_ERR_NO_ERROR;
int64_t BaseOffset = -1;
int32_t partition_tags_to_write[1] = {0};
size_t partition_tags_to_write_cnt = 0;
rd_kafka_buf_read_i32(rkbuf, &Partition);
if (mtopic)
mpart = rd_kafka_mock_partition_find(mtopic,
Partition);
rd_kafka_buf_read_kbytes(rkbuf, &records);
/* Partition Tags */
rd_kafka_buf_skip_tags(rkbuf);
/* Response: Partition */
rd_kafka_buf_write_i32(resp, Partition);
if (all_err)
err = all_err;
else if (!mpart)
err = RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART;
else if (mpart->leader != mconn->broker)
err =
RD_KAFKA_RESP_ERR_NOT_LEADER_FOR_PARTITION;
/* Append to partition log */
if (!err)
err = rd_kafka_mock_partition_log_append(
mpart, &records, &TransactionalId,
&BaseOffset);
/* Response: ErrorCode */
rd_kafka_buf_write_i16(resp, err);
if (err) {
/* Response: BaseOffset */
rd_kafka_buf_write_i64(resp, BaseOffset);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 2) {
/* Response: LogAppendTimeMs */
rd_kafka_buf_write_i64(resp, -1);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 6) {
/* Response: LogStartOffset */
rd_kafka_buf_write_i64(resp, -1);
}
} else {
/* Response: BaseOffset */
rd_kafka_buf_write_i64(resp, BaseOffset);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 2) {
/* Response: LogAppendTimeMs */
rd_kafka_buf_write_i64(resp, 1234);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 6) {
/* Response: LogStartOffset */
rd_kafka_buf_write_i64(
resp, mpart->start_offset);
}
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 8) {
/* Response: #RecordErrors
* TODO: Add support for injecting RecordErrors
* 0 record errors for now */
rd_kafka_buf_write_arraycnt(resp, 0);
/* Response: ErrorMessage */
rd_kafka_buf_write_str(resp, NULL, 0);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 10 &&
err == RD_KAFKA_RESP_ERR_NOT_LEADER_FOR_PARTITION) {
int changed_leader_idx;
/* See if this leader is already included */
for (changed_leader_idx = 0;
changed_leader_idx < changed_leaders_cnt;
changed_leader_idx++) {
if (changed_leaders[changed_leader_idx]
->id == mpart->leader->id)
break;
}
if (changed_leader_idx == changed_leaders_cnt) {
/* Add the new leader that wasn't
* present */
changed_leaders[changed_leaders_cnt] =
mpart->leader;
changed_leaders_cnt++;
}
partition_tags_to_write
[partition_tags_to_write_cnt] =
0 /* CurrentLeader */;
partition_tags_to_write_cnt++;
}
/* Response: Partition tags */
rd_kafka_buf_write_tags(
resp,
rd_kafka_mock_Produce_reply_tags_partition_write,
partition_tags_to_write,
partition_tags_to_write_cnt, mpart);
}
/* Topic tags */
rd_kafka_buf_skip_tags(rkbuf);
/* Response: Topic tags */
rd_kafka_buf_write_tags_empty(resp);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 1) {
/* Response: ThrottleTime */
rd_kafka_buf_write_i32(resp, 0);
}
/* Response: Top level tags */
if (changed_leaders_cnt) {
tags_to_write[tags_to_write_cnt] = 0 /* NodeEndpoints */;
tags_to_write_cnt++;
}
rd_kafka_buf_write_tags(resp, rd_kafka_mock_Produce_reply_tags_write,
tags_to_write, tags_to_write_cnt,
changed_leaders, changed_leaders_cnt);
rd_kafka_mock_connection_send_response0(mconn, resp, rd_true);
rd_free(changed_leaders);
return 0;
err_parse:
rd_free(changed_leaders);
rd_kafka_buf_destroy(resp);
return -1;
}
void rd_kafka_mock_Fetch_reply_tags_partition_write(
rd_kafka_buf_t *rkbuf,
int tagtype,
rd_kafka_mock_partition_t *mpart) {
switch (tagtype) {
case 1: /* CurrentLeader */
{
int32_t leader_id = mpart->leader->id,
leader_epoch = mpart->leader_epoch;
rd_kafka_mock_partition_leader_t *mpart_leader =
rd_kafka_mock_partition_next_leader_response(mpart);
if (mpart_leader) {
leader_id = mpart_leader->leader_id;
leader_epoch = mpart_leader->leader_epoch;
rd_kafka_mock_partition_leader_destroy(mpart,
mpart_leader);
}
/* Leader id */
rd_kafka_buf_write_i32(rkbuf, leader_id);
/* Leader epoch */
rd_kafka_buf_write_i32(rkbuf, leader_epoch);
/* Field tags */
rd_kafka_buf_write_tags_empty(rkbuf);
break;
}
default:
break;
}
}
void rd_kafka_mock_Fetch_reply_tags_write(
rd_kafka_buf_t *rkbuf,
int tagtype,
rd_kafka_mock_broker_t **changed_leaders,
int changed_leader_cnt) {
int i;
switch (tagtype) {
case 0: /* NodeEndpoints */
/* #NodeEndpoints */
rd_kafka_buf_write_arraycnt(rkbuf, changed_leader_cnt);
for (i = 0; i < changed_leader_cnt; i++) {
rd_kafka_mock_broker_t *changed_leader =
changed_leaders[i];
/* Leader id */
rd_kafka_buf_write_i32(rkbuf, changed_leader->id);
/* Leader Hostname */
rd_kafka_buf_write_str(
rkbuf, changed_leader->advertised_listener, -1);
/* Leader Port number */
rd_kafka_buf_write_i32(rkbuf,
(int32_t)changed_leader->port);
/* Leader Rack */
rd_kafka_buf_write_str(rkbuf, changed_leader->rack, -1);
/* Field tags */
rd_kafka_buf_write_tags_empty(rkbuf);
}
default:
break;
}
}
/**
* @brief Handle FetchRequest
*/
static int rd_kafka_mock_handle_Fetch(rd_kafka_mock_connection_t *mconn,
rd_kafka_buf_t *rkbuf) {
const rd_bool_t log_decode_errors = rd_true;
rd_kafka_mock_cluster_t *mcluster = mconn->broker->cluster;
rd_kafka_buf_t *resp = rd_kafka_mock_buf_new_response(rkbuf);
rd_kafka_resp_err_t all_err;
int32_t ReplicaId = -1, MaxWait, MinBytes, MaxBytes = -1,
SessionId = -1, Epoch, TopicsCnt;
int8_t IsolationLevel;
size_t totsize = 0;
int32_t tags_to_write[1] = {0};
uint64_t tags_to_write_cnt = 0;
int changed_leaders_cnt = 0;
rd_kafka_mock_broker_t **changed_leaders =
rd_calloc(mcluster->broker_cnt, sizeof(*changed_leaders));
if (rkbuf->rkbuf_reqhdr.ApiVersion <= 14) {
rd_kafka_buf_read_i32(rkbuf, &ReplicaId);
}
rd_kafka_buf_read_i32(rkbuf, &MaxWait);
rd_kafka_buf_read_i32(rkbuf, &MinBytes);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 3)
rd_kafka_buf_read_i32(rkbuf, &MaxBytes);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 4)
rd_kafka_buf_read_i8(rkbuf, &IsolationLevel);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 7) {
rd_kafka_buf_read_i32(rkbuf, &SessionId);
rd_kafka_buf_read_i32(rkbuf, &Epoch);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 1) {
/* Response: ThrottleTime */
rd_kafka_buf_write_i32(resp, 0);
}
/* Inject error, if any */
all_err = rd_kafka_mock_next_request_error(mconn, resp);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 7) {
/* Response: ErrorCode */
rd_kafka_buf_write_i16(resp, all_err);
/* Response: SessionId */
rd_kafka_buf_write_i32(resp, SessionId);
}
rd_kafka_buf_read_arraycnt(rkbuf, &TopicsCnt, RD_KAFKAP_TOPICS_MAX);
/* Response: #Topics */
rd_kafka_buf_write_arraycnt(resp, TopicsCnt);
while (TopicsCnt-- > 0) {
rd_kafkap_str_t Topic = RD_KAFKAP_STR_INITIALIZER;
rd_kafka_Uuid_t TopicId = RD_KAFKA_UUID_ZERO;
int32_t PartitionCnt;
rd_kafka_mock_topic_t *mtopic;
rd_bool_t find_topic_by_id = rd_true;
if (rkbuf->rkbuf_reqhdr.ApiVersion <= 12) {
rd_kafka_buf_read_str(rkbuf, &Topic);
find_topic_by_id = rd_false;
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 13) {
rd_kafka_buf_read_uuid(rkbuf, &TopicId);
}
rd_kafka_buf_read_arraycnt(rkbuf, &PartitionCnt,
RD_KAFKAP_PARTITIONS_MAX);
if (find_topic_by_id) {
mtopic =
rd_kafka_mock_topic_find_by_id(mcluster, TopicId);
/* Response: TopicId */
rd_kafka_buf_write_uuid(resp, &TopicId);
} else {
mtopic =
rd_kafka_mock_topic_find_by_kstr(mcluster, &Topic);
/* Response: Topic */
rd_kafka_buf_write_kstr(resp, &Topic);
}
/* Response: #Partitions */
rd_kafka_buf_write_arraycnt(resp, PartitionCnt);
while (PartitionCnt-- > 0) {
int32_t Partition, CurrentLeaderEpoch = -1,
LastFetchedEpoch = -1, PartMaxBytes;
int64_t FetchOffset, LogStartOffset;
rd_kafka_mock_partition_t *mpart = NULL;
rd_kafka_resp_err_t err = all_err;
rd_bool_t on_follower;
size_t partsize = 0;
const rd_kafka_mock_msgset_t *mset = NULL;
int32_t partition_tags_to_write[1] = {0};
uint64_t partition_tags_to_write_cnt = 0;
rd_kafka_buf_read_i32(rkbuf, &Partition);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 9)
rd_kafka_buf_read_i32(rkbuf,
&CurrentLeaderEpoch);
rd_kafka_buf_read_i64(rkbuf, &FetchOffset);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 12)
rd_kafka_buf_read_i32(rkbuf, &LastFetchedEpoch);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 5)
rd_kafka_buf_read_i64(rkbuf, &LogStartOffset);
rd_kafka_buf_read_i32(rkbuf, &PartMaxBytes);
/* Partition tags */
rd_kafka_buf_skip_tags(rkbuf);
if (mtopic)
mpart = rd_kafka_mock_partition_find(mtopic,
Partition);
else if (find_topic_by_id)
err = RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_ID;
/* Response: Partition */
rd_kafka_buf_write_i32(resp, Partition);
/* Fetch is directed at follower and this is
* the follower broker. */
on_follower =
mpart && mpart->follower_id == mconn->broker->id;
if (!err) {
if (!all_err && !mpart)
err =
RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART;
else if (!all_err &&
mpart->leader != mconn->broker &&
!on_follower)
err =
RD_KAFKA_RESP_ERR_NOT_LEADER_OR_FOLLOWER;
}
if (!err && mpart)
err =
rd_kafka_mock_partition_leader_epoch_check(
mpart, CurrentLeaderEpoch);
/* Find MessageSet for FetchOffset */
if (!err && FetchOffset != mpart->end_offset) {
/* Kafka currently only returns
* OFFSET_NOT_AVAILABLE
* in ListOffsets calls */
if (!(mset = rd_kafka_mock_msgset_find(
mpart, FetchOffset, on_follower)))
err =
RD_KAFKA_RESP_ERR_OFFSET_OUT_OF_RANGE;
rd_kafka_dbg(
mcluster->rk, MOCK, "MOCK",
"Topic %.*s [%" PRId32
"] fetch err %s for offset %" PRId64
" mset %p, on_follower %d, "
"start %" PRId64 ", end_offset %" PRId64
", current epoch %" PRId32,
RD_KAFKAP_STR_PR(&Topic), Partition,
rd_kafka_err2name(err), FetchOffset, mset,
on_follower, mpart->start_offset,
mpart->end_offset, mpart->leader_epoch);
}
/* Response: ErrorCode */
rd_kafka_buf_write_i16(resp, err);
/* Response: Highwatermark */
rd_kafka_buf_write_i64(
resp,
mpart ? (on_follower ? mpart->follower_end_offset
: mpart->end_offset)
: -1);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 4) {
/* Response: LastStableOffset */
rd_kafka_buf_write_i64(
resp, mpart ? mpart->end_offset : -1);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 5) {
/* Response: LogStartOffset */
rd_kafka_buf_write_i64(
resp,
!mpart ? -1
: (on_follower
? mpart->follower_start_offset
: mpart->start_offset));
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 4) {
/* Response: #Aborted */
rd_kafka_buf_write_arraycnt(resp, 0);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 11) {
int32_t PreferredReadReplica =
mpart && mpart->leader == mconn->broker &&
mpart->follower_id != -1
? mpart->follower_id
: -1;
/* Response: PreferredReplica */
rd_kafka_buf_write_i32(resp,
PreferredReadReplica);
if (PreferredReadReplica != -1) {
/* Don't return any data when
* PreferredReadReplica is set */
mset = NULL;
MaxWait = 0;
}
}
if (mset && partsize < (size_t)PartMaxBytes &&
totsize < (size_t)MaxBytes) {
/* Response: Records */
size_t written = rd_kafka_buf_write_kbytes(
resp, &mset->bytes);
partsize += written;
totsize += written;
/* FIXME: Multiple messageSets ? */
} else {
/* Empty Response: Records: Null */
rd_kafka_buf_write_arraycnt(resp, 0);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 12 &&
err == RD_KAFKA_RESP_ERR_NOT_LEADER_OR_FOLLOWER) {
int changed_leader_idx;
for (changed_leader_idx = 0;
changed_leader_idx < changed_leaders_cnt;
changed_leader_idx++) {
if (changed_leaders[changed_leader_idx]
->id == mpart->leader->id)
break;
}
if (changed_leader_idx == changed_leaders_cnt) {
changed_leaders[changed_leaders_cnt] =
mpart->leader;
changed_leaders_cnt++;
}
/* CurrentLeader */
partition_tags_to_write
[partition_tags_to_write_cnt] = 1;
partition_tags_to_write_cnt++;
}
/* Response: Partition tags */
rd_kafka_buf_write_tags(
resp,
rd_kafka_mock_Fetch_reply_tags_partition_write,
partition_tags_to_write,
partition_tags_to_write_cnt, mpart);
}
/* Topic tags */
rd_kafka_buf_skip_tags(rkbuf);
/* Response: Topic tags */
rd_kafka_buf_write_tags_empty(resp);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 7) {
int32_t ForgottenTopicCnt;
rd_kafka_buf_read_arraycnt(rkbuf, &ForgottenTopicCnt,
RD_KAFKAP_TOPICS_MAX);
while (ForgottenTopicCnt-- > 0) {
rd_kafkap_str_t Topic = RD_KAFKAP_STR_INITIALIZER;
rd_kafka_Uuid_t TopicId = RD_KAFKA_UUID_ZERO;
int32_t ForgPartCnt;
if (rkbuf->rkbuf_reqhdr.ApiVersion <= 12) {
rd_kafka_buf_read_str(rkbuf, &Topic);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 13) {
rd_kafka_buf_read_uuid(rkbuf, &TopicId);
}
rd_kafka_buf_read_arraycnt(rkbuf, &ForgPartCnt,
RD_KAFKAP_PARTITIONS_MAX);
while (ForgPartCnt-- > 0) {
int32_t Partition;
rd_kafka_buf_read_i32(rkbuf, &Partition);
}
/* ForgottenTopic tags */
rd_kafka_buf_skip_tags(rkbuf);
}
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 11) {
rd_kafkap_str_t RackId;
char *rack;
rd_kafka_buf_read_str(rkbuf, &RackId);
RD_KAFKAP_STR_DUPA(&rack, &RackId);
/* Matt might do something sensible with this */
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 16 && changed_leaders_cnt) {
tags_to_write[tags_to_write_cnt] = 0 /* NodeEndpoints */;
tags_to_write_cnt++;
}
/* Response: Top level tags */
rd_kafka_buf_write_tags(resp, rd_kafka_mock_Fetch_reply_tags_write,
tags_to_write, tags_to_write_cnt,
changed_leaders, changed_leaders_cnt);
/* If there was no data, delay up to MaxWait.
* This isn't strictly correct since we should cut the wait short
* and feed newly produced data if a producer writes to the
* partitions, but that is too much of a hassle here since we
* can't block the thread. */
if (!totsize && MaxWait > 0)
resp->rkbuf_ts_retry = rd_clock() + (MaxWait * 1000);
rd_kafka_mock_connection_send_response0(mconn, resp, rd_true);
rd_free(changed_leaders);
return 0;
err_parse:
rd_kafka_buf_destroy(resp);
rd_free(changed_leaders);
return -1;
}
/**
* @brief Handle ListOffsets
*/
static int rd_kafka_mock_handle_ListOffsets(rd_kafka_mock_connection_t *mconn,
rd_kafka_buf_t *rkbuf) {
const rd_bool_t log_decode_errors = rd_true;
rd_kafka_mock_cluster_t *mcluster = mconn->broker->cluster;
rd_kafka_buf_t *resp = rd_kafka_mock_buf_new_response(rkbuf);
rd_kafka_resp_err_t all_err;
int32_t ReplicaId, TopicsCnt;
int8_t IsolationLevel;
rd_kafka_buf_read_i32(rkbuf, &ReplicaId);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 2)
rd_kafka_buf_read_i8(rkbuf, &IsolationLevel);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 2) {
/* Response: ThrottleTime */
rd_kafka_buf_write_i32(resp, 0);
}
/* Inject error, if any */
all_err = rd_kafka_mock_next_request_error(mconn, resp);
rd_kafka_buf_read_arraycnt(rkbuf, &TopicsCnt, RD_KAFKAP_TOPICS_MAX);
/* Response: #Topics */
rd_kafka_buf_write_arraycnt(resp, TopicsCnt);
while (TopicsCnt-- > 0) {
rd_kafkap_str_t Topic;
int32_t PartitionCnt;
rd_kafka_mock_topic_t *mtopic;
rd_kafka_buf_read_str(rkbuf, &Topic);
rd_kafka_buf_read_arraycnt(rkbuf, &PartitionCnt,
RD_KAFKAP_PARTITIONS_MAX);
mtopic = rd_kafka_mock_topic_find_by_kstr(mcluster, &Topic);
/* Response: Topic */
rd_kafka_buf_write_kstr(resp, &Topic);
/* Response: #Partitions */
rd_kafka_buf_write_arraycnt(resp, PartitionCnt);
while (PartitionCnt-- > 0) {
int32_t Partition, CurrentLeaderEpoch = -1;
int64_t Timestamp, Offset = -1;
int32_t MaxNumOffsets;
rd_kafka_mock_partition_t *mpart = NULL;
rd_kafka_resp_err_t err = all_err;
rd_kafka_buf_read_i32(rkbuf, &Partition);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 4)
rd_kafka_buf_read_i32(rkbuf,
&CurrentLeaderEpoch);
rd_kafka_buf_read_i64(rkbuf, &Timestamp);
if (rkbuf->rkbuf_reqhdr.ApiVersion == 0)
rd_kafka_buf_read_i32(rkbuf, &MaxNumOffsets);
/* Partition tags */
rd_kafka_buf_skip_tags(rkbuf);
if (mtopic)
mpart = rd_kafka_mock_partition_find(mtopic,
Partition);
/* Response: Partition */
rd_kafka_buf_write_i32(resp, Partition);
if (!all_err && !mpart)
err = RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART;
else if (!all_err && mpart->leader != mconn->broker)
err =
RD_KAFKA_RESP_ERR_NOT_LEADER_FOR_PARTITION;
if (!err && mpart)
err =
rd_kafka_mock_partition_leader_epoch_check(
mpart, CurrentLeaderEpoch);
/* Response: ErrorCode */
rd_kafka_buf_write_i16(resp, err);
if (!err && mpart) {
if (Timestamp == RD_KAFKA_OFFSET_BEGINNING)
Offset = mpart->start_offset;
else if (Timestamp == RD_KAFKA_OFFSET_END)
Offset = mpart->end_offset;
else if (Timestamp < 0)
Offset = -1;
else /* FIXME: by timestamp */
Offset = -1;
}
if (rkbuf->rkbuf_reqhdr.ApiVersion == 0) {
/* Response: #OldStyleOffsets */
rd_kafka_buf_write_i32(resp,
Offset != -1 ? 1 : 0);
/* Response: OldStyleOffsets[0] */
if (Offset != -1)
rd_kafka_buf_write_i64(resp, Offset);
} else {
/* Response: Timestamp (FIXME) */
rd_kafka_buf_write_i64(resp, -1);
/* Response: Offset */
rd_kafka_buf_write_i64(resp, Offset);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 4) {
/* Response: LeaderEpoch */
const rd_kafka_mock_msgset_t *mset = NULL;
int32_t leader_epoch = -1;
rd_bool_t on_follower = rd_false;
if (mpart) {
on_follower =
mpart && mpart->follower_id ==
mconn->broker->id;
if (Offset >= 0 &&
(mset = rd_kafka_mock_msgset_find(
mpart, Offset, on_follower))) {
leader_epoch =
mset->leader_epoch;
}
}
rd_kafka_buf_write_i32(resp, leader_epoch);
}
/* Response: Partition tags */
rd_kafka_buf_write_tags_empty(resp);
rd_kafka_dbg(mcluster->rk, MOCK, "MOCK",
"Topic %.*s [%" PRId32
"] returning "
"offset %" PRId64 " (leader epoch %" PRId32
") for %s: %s",
RD_KAFKAP_STR_PR(&Topic), Partition,
Offset, mpart ? mpart->leader_epoch : -1,
rd_kafka_offset2str(Timestamp),
rd_kafka_err2str(err));
}
/* Topic tags */
rd_kafka_buf_skip_tags(rkbuf);
/* Response: Topic tags */
rd_kafka_buf_write_tags_empty(resp);
}
rd_kafka_mock_connection_send_response(mconn, resp);
return 0;
err_parse:
rd_kafka_buf_destroy(resp);
return -1;
}
/**
* @brief Handle OffsetFetch (fetch committed offsets)
*/
static int rd_kafka_mock_handle_OffsetFetch(rd_kafka_mock_connection_t *mconn,
rd_kafka_buf_t *rkbuf) {
const rd_bool_t log_decode_errors = rd_true;
rd_kafka_mock_cluster_t *mcluster = mconn->broker->cluster;
rd_kafka_buf_t *resp = rd_kafka_mock_buf_new_response(rkbuf);
rd_kafka_mock_broker_t *mrkb;
rd_kafka_resp_err_t all_err;
int32_t TopicsCnt;
rd_kafkap_str_t GroupId;
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 3) {
/* Response: ThrottleTime */
rd_kafka_buf_write_i32(resp, 0);
}
rd_kafka_buf_read_str(rkbuf, &GroupId);
/* Inject error, if any */
all_err = rd_kafka_mock_next_request_error(mconn, resp);
mrkb = rd_kafka_mock_cluster_get_coord(mcluster, RD_KAFKA_COORD_GROUP,
&GroupId);
if (!mrkb && !all_err)
all_err = RD_KAFKA_RESP_ERR_NOT_COORDINATOR; // FIXME? check if
// its this mrkb?
rd_kafka_buf_read_arraycnt(rkbuf, &TopicsCnt, 100000);
/* Response: #Topics */
rd_kafka_buf_write_arraycnt(resp, TopicsCnt);
while (TopicsCnt-- > 0) {
rd_kafkap_str_t Topic;
int32_t PartitionCnt;
rd_kafka_mock_topic_t *mtopic;
rd_kafka_buf_read_str(rkbuf, &Topic);
rd_kafka_buf_read_arraycnt(rkbuf, &PartitionCnt, 100000);
mtopic = rd_kafka_mock_topic_find_by_kstr(mcluster, &Topic);
/* Response: Topic */
rd_kafka_buf_write_kstr(resp, &Topic);
/* Response: #Partitions */
rd_kafka_buf_write_arraycnt(resp, PartitionCnt);
while (PartitionCnt-- > 0) {
int32_t Partition;
rd_kafka_mock_partition_t *mpart = NULL;
const rd_kafka_mock_committed_offset_t *coff = NULL;
rd_kafka_resp_err_t err = all_err;
rd_kafka_buf_read_i32(rkbuf, &Partition);
if (mtopic)
mpart = rd_kafka_mock_partition_find(mtopic,
Partition);
/* Response: Partition */
rd_kafka_buf_write_i32(resp, Partition);
if (!all_err && !mpart)
err = RD_KAFKA_RESP_ERR_UNKNOWN_TOPIC_OR_PART;
if (!err)
coff = rd_kafka_mock_committed_offset_find(
mpart, &GroupId);
/* Response: CommittedOffset */
rd_kafka_buf_write_i64(resp, coff ? coff->offset : -1);
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 5) {
/* Response: CommittedLeaderEpoch */
rd_kafka_buf_write_i32(
resp, mpart ? mpart->leader_epoch : -1);
}
/* Response: Metadata */
rd_kafka_buf_write_kstr(resp,
coff ? coff->metadata : NULL);
/* Response: ErrorCode */
rd_kafka_buf_write_i16(resp, err);
/* Response: Struct tags */
rd_kafka_buf_write_tags_empty(resp);
if (coff)
rd_kafka_dbg(mcluster->rk, MOCK, "MOCK",
"Topic %s [%" PRId32
"] returning "
"committed offset %" PRId64
" for group %s",
mtopic->name, mpart->id,
coff->offset, coff->group);
else
rd_kafka_dbg(mcluster->rk, MOCK, "MOCK",
"Topic %.*s [%" PRId32
"] has no "
"committed offset for group %.*s: "
"%s",
RD_KAFKAP_STR_PR(&Topic),
Partition,
RD_KAFKAP_STR_PR(&GroupId),
rd_kafka_err2str(err));
}
/* Request: Skip struct tags */
rd_kafka_buf_skip_tags(rkbuf);
/* Response: Struct tags */
rd_kafka_buf_write_tags_empty(resp);
}
if (rkbuf->rkbuf_reqhdr.ApiVersion >= 2) {
/* Response: Outer ErrorCode */
rd_kafka_buf_write_i16(resp, all_err);
}
rd_kafka_mock_connection_send_response(mconn, resp);
return 0;
err_parse:
rd_kafka_buf_destroy(resp);
return -1;
}
/**
* @brief Handle OffsetCommit
*/
static int rd_kafka_mock_handle_OffsetCommit(rd_kafka_mock_connection_t *mconn,
rd_kafka_buf_t *rkbuf) {
const rd_bool_t log_decode_errors = rd_true;