/
protocol.cpp
1341 lines (1128 loc) · 42 KB
/
protocol.cpp
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/*
* Copyright (C) 2011-2017 Redis Labs Ltd.
*
* This file is part of memtier_benchmark.
*
* memtier_benchmark is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2.
*
* memtier_benchmark is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with memtier_benchmark. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_ASSERT_H
#include <assert.h>
#endif
#include "protocol.h"
#include "memtier_benchmark.h"
#include "libmemcached_protocol/binary.h"
/////////////////////////////////////////////////////////////////////////
abstract_protocol::abstract_protocol() :
m_read_buf(NULL), m_write_buf(NULL), m_keep_value(false)
{
}
abstract_protocol::~abstract_protocol()
{
}
void abstract_protocol::set_buffers(struct evbuffer* read_buf, struct evbuffer* write_buf)
{
m_read_buf = read_buf;
m_write_buf = write_buf;
}
void abstract_protocol::set_keep_value(bool flag)
{
m_keep_value = flag;
}
/////////////////////////////////////////////////////////////////////////
protocol_response::protocol_response()
: m_status(NULL), m_mbulk_value(NULL), m_value(NULL), m_value_len(0), m_hits(0), m_error(false)
{
}
protocol_response::~protocol_response()
{
clear();
}
void protocol_response::set_error()
{
m_error = true;
}
bool protocol_response::is_error(void)
{
return m_error;
}
void protocol_response::set_status(const char* status)
{
if (m_status != NULL)
free((void *)m_status);
m_status = status;
}
const char* protocol_response::get_status(void)
{
return m_status;
}
void protocol_response::set_value(const char* value, unsigned int value_len)
{
if (m_value != NULL)
free((void *)m_value);
m_value = value;
m_value_len = value_len;
}
const char* protocol_response::get_value(unsigned int* value_len)
{
assert(value_len != NULL);
*value_len = m_value_len;
return m_value;
}
void protocol_response::set_total_len(unsigned int total_len)
{
m_total_len = total_len;
}
unsigned int protocol_response::get_total_len(void)
{
return m_total_len;
}
void protocol_response::incr_hits(void)
{
m_hits++;
}
unsigned int protocol_response::get_hits(void)
{
return m_hits;
}
void protocol_response::clear(void)
{
if (m_status != NULL) {
free((void *)m_status);
m_status = NULL;
}
if (m_value != NULL) {
free((void *)m_value);
m_value = NULL;
}
if (m_mbulk_value != NULL) {
delete m_mbulk_value;
m_mbulk_value = NULL;
}
m_value_len = 0;
m_total_len = 0;
m_hits = 0;
m_error = 0;
}
void protocol_response::set_mbulk_value(mbulk_size_el* element) {
m_mbulk_value = element;
}
mbulk_size_el* protocol_response::get_mbulk_value() {
return m_mbulk_value;
}
/////////////////////////////////////////////////////////////////////////
class redis_protocol : public abstract_protocol {
protected:
enum response_state { rs_initial, rs_read_bulk, rs_read_line, rs_end_bulk };
response_state m_response_state;
long m_bulk_len;
size_t m_response_len;
unsigned int m_total_bulks_count;
mbulk_size_el* m_current_mbulk;
bool m_resp3;
bool m_attribute;
bool aggregate_type(char c);
bool blob_type(char c);
bool single_type(char c);
bool response_ended();
public:
redis_protocol() : m_response_state(rs_initial), m_bulk_len(0), m_response_len(0), m_total_bulks_count(0), m_current_mbulk(NULL), m_resp3(false), m_attribute(false) { }
virtual redis_protocol* clone(void) { return new redis_protocol(); }
virtual int select_db(int db);
virtual int authenticate(const char *credentials);
virtual int configure_protocol(enum PROTOCOL_TYPE type);
virtual int write_command_cluster_slots();
virtual int write_command_set(const char *key, int key_len, const char *value, int value_len, int expiry, unsigned int offset);
virtual int write_command_get(const char *key, int key_len, unsigned int offset);
virtual int write_command_multi_get(const keylist *keylist);
virtual int write_command_wait(unsigned int num_slaves, unsigned int timeout);
virtual int parse_response(void);
// handle arbitrary command
virtual bool format_arbitrary_command(arbitrary_command &cmd);
int write_arbitrary_command(const command_arg *arg);
int write_arbitrary_command(const char *val, int val_len);
};
int redis_protocol::select_db(int db)
{
int size = 0;
char db_str[20];
snprintf(db_str, sizeof(db_str)-1, "%d", db);
size = evbuffer_add_printf(m_write_buf,
"*2\r\n"
"$6\r\n"
"SELECT\r\n"
"$%u\r\n"
"%s\r\n",
(unsigned int)strlen(db_str), db_str);
return size;
}
int redis_protocol::authenticate(const char *credentials)
{
int size = 0;
assert(credentials != NULL);
/* Credentials may be one of:
* <PASSWORD> For Redis <6.0 simple AUTH commands.
* <USER>:<PASSWORD> For Redis 6.0+ AUTH with both username and password.
*
* A :<PASSWORD> will be handled as a special case of quoting a password that
* contains a colon.
*/
const char *user = NULL;
const char *password;
if (credentials[0] == ':') {
password = credentials + 1;
} else {
password = strchr(credentials, ':');
if (!password) {
password = credentials;
} else {
user = credentials;
password++;
}
}
if (!user) {
size = evbuffer_add_printf(m_write_buf,
"*2\r\n"
"$4\r\n"
"AUTH\r\n"
"$%zu\r\n"
"%s\r\n",
strlen(password), password);
} else {
size_t user_len = password - user - 1;
size = evbuffer_add_printf(m_write_buf,
"*3\r\n"
"$4\r\n"
"AUTH\r\n"
"$%zu\r\n"
"%.*s\r\n"
"$%zu\r\n"
"%s\r\n",
user_len,
(int) user_len,
user,
strlen(password),
password);
}
return size;
}
int redis_protocol::configure_protocol(enum PROTOCOL_TYPE type) {
int size = 0;
if (type == PROTOCOL_RESP2 || type == PROTOCOL_RESP3) {
m_resp3 = type == PROTOCOL_RESP3;
size = evbuffer_add_printf(m_write_buf,
"*2\r\n"
"$5\r\n"
"HELLO\r\n"
"$1\r\n"
"%d\r\n",
type == PROTOCOL_RESP2 ? 2 : 3);
}
return size;
}
int redis_protocol::write_command_cluster_slots()
{
int size = 0;
size = evbuffer_add(m_write_buf,
"*2\r\n"
"$7\r\n"
"CLUSTER\r\n"
"$5\r\n"
"SLOTS\r\n",
28);
return size;
}
int redis_protocol::write_command_set(const char *key, int key_len, const char *value, int value_len, int expiry, unsigned int offset)
{
assert(key != NULL);
assert(key_len > 0);
assert(value != NULL);
assert(value_len > 0);
int size = 0;
if (!expiry && !offset) {
size = evbuffer_add_printf(m_write_buf,
"*3\r\n"
"$3\r\n"
"SET\r\n"
"$%u\r\n", key_len);
evbuffer_add(m_write_buf, key, key_len);
size += key_len;
size += evbuffer_add_printf(m_write_buf,
"\r\n"
"$%u\r\n", value_len);
} else if(offset) {
char offset_str[30];
snprintf(offset_str, sizeof(offset_str)-1, "%u", offset);
size = evbuffer_add_printf(m_write_buf,
"*4\r\n"
"$8\r\n"
"SETRANGE\r\n"
"$%u\r\n", key_len);
evbuffer_add(m_write_buf, key, key_len);
size += key_len;
size += evbuffer_add_printf(m_write_buf,
"\r\n"
"$%u\r\n"
"%s\r\n"
"$%u\r\n", (unsigned int) strlen(offset_str), offset_str, value_len);
} else {
char expiry_str[30];
snprintf(expiry_str, sizeof(expiry_str)-1, "%u", expiry);
size = evbuffer_add_printf(m_write_buf,
"*4\r\n"
"$5\r\n"
"SETEX\r\n"
"$%u\r\n", key_len);
evbuffer_add(m_write_buf, key, key_len);
size += key_len;
size += evbuffer_add_printf(m_write_buf,
"\r\n"
"$%u\r\n"
"%s\r\n"
"$%u\r\n", (unsigned int) strlen(expiry_str), expiry_str, value_len);
}
evbuffer_add(m_write_buf, value, value_len);
evbuffer_add(m_write_buf, "\r\n", 2);
size += value_len + 2;
return size;
}
int redis_protocol::write_command_multi_get(const keylist *keylist)
{
fprintf(stderr, "error: multi get not implemented for redis yet!\n");
assert(0);
}
int redis_protocol::write_command_get(const char *key, int key_len, unsigned int offset)
{
assert(key != NULL);
assert(key_len > 0);
int size = 0;
if (!offset) {
size = evbuffer_add_printf(m_write_buf,
"*2\r\n"
"$3\r\n"
"GET\r\n"
"$%u\r\n", key_len);
evbuffer_add(m_write_buf, key, key_len);
evbuffer_add(m_write_buf, "\r\n", 2);
size += key_len + 2;
} else {
char offset_str[30];
snprintf(offset_str, sizeof(offset_str)-1, "%u", offset);
size = evbuffer_add_printf(m_write_buf,
"*4\r\n"
"$8\r\n"
"GETRANGE\r\n"
"$%u\r\n", key_len);
evbuffer_add(m_write_buf, key, key_len);
size += key_len;
size += evbuffer_add_printf(m_write_buf,
"\r\n"
"$%u\r\n"
"%s\r\n"
"$2\r\n"
"-1\r\n", (unsigned int) strlen(offset_str), offset_str);
}
return size;
}
/*
* Utility function to get the number of digits in a number
*/
static int get_number_length(unsigned int num)
{
if (num < 10) return 1;
if (num < 100) return 2;
if (num < 1000) return 3;
if (num < 10000) return 4;
if (num < 100000) return 5;
if (num < 1000000) return 6;
if (num < 10000000) return 7;
if (num < 100000000) return 8;
if (num < 1000000000) return 9;
return 10;
}
int redis_protocol::write_command_wait(unsigned int num_slaves, unsigned int timeout)
{
int size = 0;
size = evbuffer_add_printf(m_write_buf,
"*3\r\n"
"$4\r\n"
"WAIT\r\n"
"$%u\r\n"
"%u\r\n"
"$%u\r\n"
"%u\r\n",
get_number_length(num_slaves), num_slaves,
get_number_length(timeout), timeout);
return size;
}
bool redis_protocol::aggregate_type(char c) {
if (c == '*')
return true;
if (m_resp3 && (c == '%' || c == '~' || c == '|'))
return true;
return false;
}
bool redis_protocol::blob_type(char c) {
if (c == '$')
return true;
if (m_resp3 && (c == '!' || c == '='))
return true;
return false;
}
bool redis_protocol::single_type(char c) {
if (c == '+' || c == '-' || c == ':')
return true;
if (m_resp3 && (c == '_' || c == ',' || c == '#' || c == '('))
return true;
return false;
}
bool redis_protocol::response_ended() {
if (m_total_bulks_count != 0)
return false;
if (m_attribute) {
m_attribute = false;
return false;
}
return true;
}
int redis_protocol::parse_response(void)
{
char *line;
size_t res_len;
while (true) {
switch (m_response_state) {
case rs_initial:
// clear last response
m_last_response.clear();
m_response_len = 0;
m_total_bulks_count = 0;
m_attribute = 0;
m_response_state = rs_read_line;
break;
case rs_read_line:
line = evbuffer_readln(m_read_buf, &res_len, EVBUFFER_EOL_CRLF_STRICT);
// maybe we didn't get it yet?
if (line == NULL) {
return 0;
}
// count CRLF
m_response_len += res_len + 2;
if (aggregate_type(line[0])) {
int count = strtol(line + 1, NULL, 10);
// in case of nested mbulk, the mbulk is one of the total bulks
if (m_total_bulks_count > 0) {
m_total_bulks_count--;
}
// from bulks counter perspective every count < 0 is equal to 0, because it's not followed by bulks.
if (count < 0) {
count = 0;
}
if (line[0] == '|') {
// Nested attribute?
assert(!m_attribute);
m_attribute = true;
}
// Map or Attribute contain key-value pair
if (line[0] == '%' || line[0] == '|') {
count *= 2;
}
if (m_keep_value) {
mbulk_size_el* new_mbulk_size = new mbulk_size_el();
new_mbulk_size->bulks_count = count;
new_mbulk_size->upper_level = m_current_mbulk;
// update first mbulk as the response mbulk, or insert it to current mbulk
if (m_last_response.get_mbulk_value() == NULL) {
m_last_response.set_mbulk_value(new_mbulk_size);
} else {
m_current_mbulk->add_new_element(new_mbulk_size);
}
// update current mbulk
m_current_mbulk = new_mbulk_size->get_next_mbulk();
}
m_last_response.set_status(line);
m_total_bulks_count += count;
if (response_ended()) {
m_last_response.set_total_len(m_response_len);
m_response_state = rs_initial;
return 1;
}
} else if (blob_type(line[0])) {
// if it's single bulk (not part of mbulk), we count it here
if (m_total_bulks_count == 0) {
m_total_bulks_count++;
}
m_bulk_len = strtol(line + 1, NULL, 10);
m_last_response.set_status(line);
if (line[0] == '!')
m_last_response.set_error();
/*
* only on negative bulk, the data ends right after the first CRLF ($-1\r\n), so
* we skip on rs_read_bulk and jump into rs_end_bulk
*/
if (m_bulk_len < 0) {
m_response_state = rs_end_bulk;
} else {
m_response_state = rs_read_bulk;
}
} else if (single_type(line[0])) {
// if it's single bulk (not part of mbulk), we count it here
if (m_total_bulks_count == 0) {
m_total_bulks_count++;
}
// if we are not inside mbulk, the status will be kept in m_status anyway
if (m_keep_value && m_current_mbulk) {
char *bulk_value = strdup(line);
assert(bulk_value != NULL);
bulk_el* new_bulk = new bulk_el();
new_bulk->value = bulk_value;
new_bulk->value_len = strlen(bulk_value);
// insert it to current mbulk
m_current_mbulk->add_new_element(new_bulk);
m_current_mbulk = m_current_mbulk->get_next_mbulk();
}
if (line[0] == '-')
m_last_response.set_error();
m_last_response.set_status(line);
m_total_bulks_count--;
if (response_ended()) {
m_last_response.set_total_len(m_response_len);
m_response_state = rs_initial;
return 1;
}
} else {
benchmark_debug_log("unsupported response: '%s'.\n", line);
free(line);
return -1;
}
break;
case rs_read_bulk:
if (evbuffer_get_length(m_read_buf) >= (unsigned long)(m_bulk_len + 2)) {
m_response_len += m_bulk_len + 2;
/*
* KNOWN ISSUE:
* in case of key with zero size (SET X "") that will return $0,
* we are not counting it as "hit", and the report will be wrong.
* currently this is a limitation because GETRANGE returns $0 for
* such key as well as non existing key or existing key without data
* in the requested range
*/
if (m_bulk_len > 0) {
m_last_response.incr_hits();
}
m_response_state = rs_end_bulk;
} else {
return 0;
}
break;
case rs_end_bulk:
if (m_keep_value) {
/*
* keep bulk value - in case we need to save bulk value it depends
* if it's inside a mbulk or not.
* in case of receiving just bulk as a response, we save it directly to the m_last_response,
* otherwise we insert it to the current mbulk element
*/
char *bulk_value = NULL;
int ret;
if (m_bulk_len > 0) {
bulk_value = (char *) malloc(m_bulk_len);
assert(bulk_value != NULL);
ret = evbuffer_remove(m_read_buf, bulk_value, m_bulk_len);
assert(ret != -1);
}
// drain last CRLF, zero bulk also includes it ($0\r\n\r\n)
if (m_bulk_len >= 0) {
ret = evbuffer_drain(m_read_buf, 2);
assert(ret != -1);
}
// in case we are inside mbulk
if (m_current_mbulk) {
bulk_el* new_bulk = new bulk_el();
new_bulk->value = bulk_value;
// negative bulk len counted as empty bulk
new_bulk->value_len = m_bulk_len > 0 ? m_bulk_len : 0;
// insert it to current mbulk
m_current_mbulk->add_new_element(new_bulk);
m_current_mbulk = m_current_mbulk->get_next_mbulk();
} else {
// negative bulk len counted as empty bulk
m_last_response.set_value(bulk_value, m_bulk_len > 0 ? m_bulk_len : 0);
}
} else {
// just drain the buffer, include the CRLF
if (m_bulk_len >= 0) {
int ret = evbuffer_drain(m_read_buf, m_bulk_len + 2);
assert(ret != -1);
}
}
m_total_bulks_count--;
if (response_ended()) {
m_last_response.set_total_len(m_response_len);
m_response_state = rs_initial;
return 1;
} else {
m_response_state = rs_read_line;
}
break;
default:
return -1;
}
}
return -1;
}
int redis_protocol::write_arbitrary_command(const command_arg *arg) {
evbuffer_add(m_write_buf, arg->data.c_str(), arg->data.length());
return arg->data.length();
}
int redis_protocol::write_arbitrary_command(const char *rand_val, int rand_val_len) {
int size = 0;
size = evbuffer_add_printf(m_write_buf, "$%d\r\n", rand_val_len);
evbuffer_add(m_write_buf, rand_val, rand_val_len);
size += rand_val_len;
evbuffer_add(m_write_buf, "\r\n", 2);
size += 2;
return size;
}
bool redis_protocol::format_arbitrary_command(arbitrary_command &cmd) {
for (unsigned int i = 0; i < cmd.command_args.size(); i++) {
command_arg* current_arg = &cmd.command_args[i];
current_arg->type = const_type;
// check arg type
if (current_arg->data.find(KEY_PLACEHOLDER) != std::string::npos) {
if (current_arg->data.length() != strlen(KEY_PLACEHOLDER)) {
benchmark_error_log("error: key placeholder can't combined with other data\n");
return false;
}
cmd.keys_count++;
current_arg->type = key_type;
} else if (current_arg->data.find(DATA_PLACEHOLDER) != std::string::npos) {
if (current_arg->data.length() != strlen(DATA_PLACEHOLDER)) {
benchmark_error_log("error: data placeholder can't combined with other data\n");
return false;
}
current_arg->type = data_type;
}
// we expect that first arg is the COMMAND name
assert(i != 0 || (i == 0 && current_arg->type == const_type && "first arg is not command name?"));
if (current_arg->type == const_type) {
char buffer[20];
int buffer_len;
// if it's first arg we add also the mbulk size
if (i == 0) {
buffer_len = snprintf(buffer, 20, "*%zd\r\n$%zd\r\n", cmd.command_args.size(), current_arg->data.length());
} else {
buffer_len = snprintf(buffer, 20, "$%zd\r\n", current_arg->data.length());
}
current_arg->data.insert(0, buffer, buffer_len);
current_arg->data += "\r\n";
}
}
return true;
}
/////////////////////////////////////////////////////////////////////////
class memcache_text_protocol : public abstract_protocol {
protected:
enum response_state { rs_initial, rs_read_section, rs_read_value, rs_read_end };
response_state m_response_state;
unsigned int m_value_len;
size_t m_response_len;
public:
memcache_text_protocol() : m_response_state(rs_initial), m_value_len(0), m_response_len(0) { }
virtual memcache_text_protocol* clone(void) { return new memcache_text_protocol(); }
virtual int select_db(int db);
virtual int authenticate(const char *credentials);
virtual int configure_protocol(enum PROTOCOL_TYPE type);
virtual int write_command_cluster_slots();
virtual int write_command_set(const char *key, int key_len, const char *value, int value_len, int expiry, unsigned int offset);
virtual int write_command_get(const char *key, int key_len, unsigned int offset);
virtual int write_command_multi_get(const keylist *keylist);
virtual int write_command_wait(unsigned int num_slaves, unsigned int timeout);
virtual int parse_response(void);
// handle arbitrary command
virtual bool format_arbitrary_command(arbitrary_command& cmd);
virtual int write_arbitrary_command(const command_arg *arg);
virtual int write_arbitrary_command(const char *val, int val_len);
};
int memcache_text_protocol::select_db(int db)
{
assert(0);
}
int memcache_text_protocol::authenticate(const char *credentials)
{
assert(0);
}
int memcache_text_protocol::configure_protocol(enum PROTOCOL_TYPE type)
{
assert(0);
}
int memcache_text_protocol::write_command_cluster_slots()
{
assert(0);
}
int memcache_text_protocol::write_command_set(const char *key, int key_len, const char *value, int value_len, int expiry, unsigned int offset)
{
assert(key != NULL);
assert(key_len > 0);
assert(value != NULL);
assert(value_len > 0);
int size = 0;
size = evbuffer_add_printf(m_write_buf,
"set %.*s 0 %u %u\r\n", key_len, key, expiry, value_len);
evbuffer_add(m_write_buf, value, value_len);
evbuffer_add(m_write_buf, "\r\n", 2);
size += value_len + 2;
return size;
}
int memcache_text_protocol::write_command_get(const char *key, int key_len, unsigned int offset)
{
assert(key != NULL);
assert(key_len > 0);
int size = 0;
size = evbuffer_add_printf(m_write_buf,
"get %.*s\r\n", key_len, key);
return size;
}
int memcache_text_protocol::write_command_multi_get(const keylist *keylist)
{
assert(keylist != NULL);
assert(keylist->get_keys_count() > 0);
int n = 0;
int size = 0;
n = evbuffer_add(m_write_buf, "get", 3);
assert(n != -1);
size = 3;
for (unsigned int i = 0; i < keylist->get_keys_count(); i++) {
const char *key;
unsigned int key_len;
n = evbuffer_add(m_write_buf, " ", 1);
assert(n != -1);
size++;
key = keylist->get_key(i, &key_len);
assert(key != NULL);
n = evbuffer_add(m_write_buf, key, key_len);
assert(n != -1);
size += key_len;
}
n = evbuffer_add(m_write_buf, "\r\n", 2);
assert(n != -1);
size += 2;
return size;
}
int memcache_text_protocol::write_command_wait(unsigned int num_slaves, unsigned int timeout)
{
fprintf(stderr, "error: WAIT command not implemented for memcache!\n");
assert(0);
}
int memcache_text_protocol::parse_response(void)
{
char *line;
size_t tmplen;
while (true) {
switch (m_response_state) {
case rs_initial:
m_last_response.clear();
m_response_state = rs_read_section;
m_response_len = 0;
break;
case rs_read_section:
line = evbuffer_readln(m_read_buf, &tmplen, EVBUFFER_EOL_CRLF_STRICT);
if (!line)
return 0;
m_response_len += tmplen + 2; // For CRLF
if (m_last_response.get_status() == NULL) {
m_last_response.set_status(line);
}
m_last_response.set_total_len((unsigned int) m_response_len); // for now...
if (memcmp(line, "VALUE", 5) == 0) {
char prefix[50];
char key[256];
unsigned int flags;
unsigned int cas;
int res = sscanf(line, "%s %s %u %u %u", prefix, key, &flags, &m_value_len, &cas);
if (res < 4|| res > 5) {
benchmark_debug_log("unexpected VALUE response: %s\n", line);
if (m_last_response.get_status() != line)
free(line);
return -1;
}
m_response_state = rs_read_value;
continue;
} else if (memcmp(line, "END", 3) == 0 ||
memcmp(line, "STORED", 6) == 0) {
if (m_last_response.get_status() != line)
free(line);
m_response_state = rs_read_end;
break;
} else {
m_last_response.set_error();
benchmark_debug_log("unknown response: %s\n", line);
return -1;
}
break;
case rs_read_value:
if (evbuffer_get_length(m_read_buf) >= m_value_len + 2) {
if (m_keep_value) {
char *value = (char *) malloc(m_value_len);
assert(value != NULL);
int ret = evbuffer_remove(m_read_buf, value, m_value_len);
assert((unsigned int) ret == 0);
m_last_response.set_value(value, m_value_len);
} else {
int ret = evbuffer_drain(m_read_buf, m_value_len);
assert((unsigned int) ret == 0);
}
int ret = evbuffer_drain(m_read_buf, 2);
assert((unsigned int) ret == 0);
m_last_response.incr_hits();
m_response_len += m_value_len + 2;
m_response_state = rs_read_section;
} else {
return 0;
}
break;
case rs_read_end:
m_response_state = rs_initial;
return 1;
default:
benchmark_debug_log("unknown response state %d.\n", m_response_state);
return -1;
}
}
return -1;
}
bool memcache_text_protocol::format_arbitrary_command(arbitrary_command& cmd) {
assert(0);
}
int memcache_text_protocol::write_arbitrary_command(const command_arg *arg) {
assert(0);
}
int memcache_text_protocol::write_arbitrary_command(const char *val, int val_len) {
assert(0);
}
/////////////////////////////////////////////////////////////////////////
class memcache_binary_protocol : public abstract_protocol {
protected:
enum response_state { rs_initial, rs_read_body };
response_state m_response_state;
protocol_binary_response_no_extras m_response_hdr;
size_t m_response_len;
const char* status_text(void);
public:
memcache_binary_protocol() : m_response_state(rs_initial), m_response_len(0) { }
virtual memcache_binary_protocol* clone(void) { return new memcache_binary_protocol(); }
virtual int select_db(int db);
virtual int authenticate(const char *credentials);
virtual int configure_protocol(enum PROTOCOL_TYPE type);
virtual int write_command_cluster_slots();
virtual int write_command_set(const char *key, int key_len, const char *value, int value_len, int expiry, unsigned int offset);
virtual int write_command_get(const char *key, int key_len, unsigned int offset);
virtual int write_command_multi_get(const keylist *keylist);
virtual int write_command_wait(unsigned int num_slaves, unsigned int timeout);
virtual int parse_response(void);
// handle arbitrary command
virtual bool format_arbitrary_command(arbitrary_command& cmd);
virtual int write_arbitrary_command(const command_arg *arg);
virtual int write_arbitrary_command(const char *val, int val_len);
};