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mysqlnd_wireprotocol.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andrey Hristov <[email protected]> |
| Ulf Wendel <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "mysqlnd.h"
#include "mysqlnd_connection.h"
#include "mysqlnd_ps.h"
#include "mysqlnd_priv.h"
#include "mysqlnd_wireprotocol.h"
#include "mysqlnd_statistics.h"
#include "mysqlnd_debug.h"
#define BAIL_IF_NO_MORE_DATA \
if (UNEXPECTED((size_t)(p - begin) > packet->header.size)) { \
php_error_docref(NULL, E_WARNING, "Premature end of data (mysqlnd_wireprotocol.c:%u)", __LINE__); \
goto premature_end; \
} \
static const char *unknown_sqlstate= "HY000";
const char * const mysqlnd_empty_string = "";
/* Used in mysqlnd_debug.c */
const char mysqlnd_read_header_name[] = "mysqlnd_read_header";
const char mysqlnd_read_body_name[] = "mysqlnd_read_body";
#define ERROR_MARKER 0xFF
#define EODATA_MARKER 0xFE
#define MARIADB_RPL_VERSION_HACK "5.5.5-"
/* {{{ mysqlnd_command_to_text */
const char * const mysqlnd_command_to_text[COM_END] =
{
"SLEEP", "QUIT", "INIT_DB", "QUERY", "FIELD_LIST",
"CREATE_DB", "DROP_DB", "REFRESH", "SHUTDOWN", "STATISTICS",
"PROCESS_INFO", "CONNECT", "PROCESS_KILL", "DEBUG", "PING",
"TIME", "DELAYED_INSERT", "CHANGE_USER", "BINLOG_DUMP",
"TABLE_DUMP", "CONNECT_OUT", "REGISTER_SLAVE",
"STMT_PREPARE", "STMT_EXECUTE", "STMT_SEND_LONG_DATA", "STMT_CLOSE",
"STMT_RESET", "SET_OPTION", "STMT_FETCH", "DAEMON", "BINLOG_DUMP_GTID",
"RESET_CONNECTION"
};
/* }}} */
static enum_mysqlnd_collected_stats packet_type_to_statistic_byte_count[PROT_LAST] =
{
STAT_LAST,
STAT_LAST,
STAT_BYTES_RECEIVED_OK,
STAT_BYTES_RECEIVED_EOF,
STAT_LAST,
STAT_BYTES_RECEIVED_RSET_HEADER,
STAT_BYTES_RECEIVED_RSET_FIELD_META,
STAT_BYTES_RECEIVED_RSET_ROW,
STAT_BYTES_RECEIVED_PREPARE_RESPONSE,
STAT_BYTES_RECEIVED_CHANGE_USER,
};
static enum_mysqlnd_collected_stats packet_type_to_statistic_packet_count[PROT_LAST] =
{
STAT_LAST,
STAT_LAST,
STAT_PACKETS_RECEIVED_OK,
STAT_PACKETS_RECEIVED_EOF,
STAT_LAST,
STAT_PACKETS_RECEIVED_RSET_HEADER,
STAT_PACKETS_RECEIVED_RSET_FIELD_META,
STAT_PACKETS_RECEIVED_RSET_ROW,
STAT_PACKETS_RECEIVED_PREPARE_RESPONSE,
STAT_PACKETS_RECEIVED_CHANGE_USER,
};
/* {{{ php_mysqlnd_net_field_length
Get next field's length */
zend_ulong
php_mysqlnd_net_field_length(const zend_uchar **packet)
{
const zend_uchar *p= (const zend_uchar *)*packet;
if (*p < 251) {
(*packet)++;
return (zend_ulong) *p;
}
switch (*p) {
case 251:
(*packet)++;
return MYSQLND_NULL_LENGTH;
case 252:
(*packet) += 3;
return (zend_ulong) uint2korr(p+1);
case 253:
(*packet) += 4;
return (zend_ulong) uint3korr(p+1);
default:
(*packet) += 9;
return (zend_ulong) uint4korr(p+1);
}
}
/* }}} */
/* {{{ php_mysqlnd_net_field_length_ll
Get next field's length */
uint64_t
php_mysqlnd_net_field_length_ll(const zend_uchar **packet)
{
const zend_uchar *p = (zend_uchar *)*packet;
if (*p < 251) {
(*packet)++;
return (uint64_t) *p;
}
switch (*p) {
case 251:
(*packet)++;
return (uint64_t) MYSQLND_NULL_LENGTH;
case 252:
(*packet) += 3;
return (uint64_t) uint2korr(p + 1);
case 253:
(*packet) += 4;
return (uint64_t) uint3korr(p + 1);
default:
(*packet) += 9;
return (uint64_t) uint8korr(p + 1);
}
}
/* }}} */
/* {{{ php_mysqlnd_net_store_length */
zend_uchar *
php_mysqlnd_net_store_length(zend_uchar *packet, const uint64_t length)
{
if (length < (uint64_t) L64(251)) {
*packet = (zend_uchar) length;
return packet + 1;
}
if (length < (uint64_t) L64(65536)) {
*packet++ = 252;
int2store(packet,(unsigned int) length);
return packet + 2;
}
if (length < (uint64_t) L64(16777216)) {
*packet++ = 253;
int3store(packet,(zend_ulong) length);
return packet + 3;
}
*packet++ = 254;
int8store(packet, length);
return packet + 8;
}
/* }}} */
/* {{{ php_mysqlnd_net_store_length_size */
size_t
php_mysqlnd_net_store_length_size(uint64_t length)
{
if (length < (uint64_t) L64(251)) {
return 1;
}
if (length < (uint64_t) L64(65536)) {
return 3;
}
if (length < (uint64_t) L64(16777216)) {
return 4;
}
return 9;
}
/* }}} */
/* {{{ php_mysqlnd_read_error_from_line */
static enum_func_status
php_mysqlnd_read_error_from_line(const zend_uchar * const buf, const size_t buf_len,
char *error, const size_t error_buf_len,
unsigned int *error_no, char *sqlstate)
{
const zend_uchar *p = buf;
size_t error_msg_len = 0;
DBG_ENTER("php_mysqlnd_read_error_from_line");
*error_no = CR_UNKNOWN_ERROR;
memcpy(sqlstate, unknown_sqlstate, MYSQLND_SQLSTATE_LENGTH);
if (buf_len > 2) {
*error_no = uint2korr(p);
p+= 2;
/*
sqlstate is following. No need to check for buf_left_len as we checked > 2 above,
if it was >=2 then we would need a check
*/
if (*p == '#') {
++p;
if ((buf_len - (p - buf)) >= MYSQLND_SQLSTATE_LENGTH) {
memcpy(sqlstate, p, MYSQLND_SQLSTATE_LENGTH);
p+= MYSQLND_SQLSTATE_LENGTH;
} else {
goto end;
}
}
if ((buf_len - (p - buf)) > 0) {
error_msg_len = MIN((int)((buf_len - (p - buf))), (int) (error_buf_len - 1));
memcpy(error, p, error_msg_len);
}
}
end:
sqlstate[MYSQLND_SQLSTATE_LENGTH] = '\0';
error[error_msg_len]= '\0';
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ mysqlnd_read_header */
static enum_func_status
mysqlnd_read_header(MYSQLND_PFC * pfc, MYSQLND_VIO * vio, MYSQLND_PACKET_HEADER * header,
MYSQLND_STATS * conn_stats, MYSQLND_ERROR_INFO * error_info)
{
zend_uchar buffer[MYSQLND_HEADER_SIZE];
DBG_ENTER(mysqlnd_read_header_name);
DBG_INF_FMT("compressed=%u", pfc->data->compressed);
if (FAIL == pfc->data->m.receive(pfc, vio, buffer, MYSQLND_HEADER_SIZE, conn_stats, error_info)) {
DBG_RETURN(FAIL);
}
header->size = uint3korr(buffer);
header->packet_no = uint1korr(buffer + 3);
DBG_INF_FMT("HEADER: prot_packet_no=%u size=%3zu", header->packet_no, header->size);
MYSQLND_INC_CONN_STATISTIC_W_VALUE2(conn_stats,
STAT_PROTOCOL_OVERHEAD_IN, MYSQLND_HEADER_SIZE,
STAT_PACKETS_RECEIVED, 1);
if (pfc->data->compressed || pfc->data->packet_no == header->packet_no) {
/*
Have to increase the number, so we can send correct number back. It will
round at 255 as this is unsigned char. The server needs this for simple
flow control checking.
*/
pfc->data->packet_no++;
DBG_RETURN(PASS);
}
// @see https://dev.mysql.com/worklog/task/?id=12999
if (header->size > 0) {
zend_uchar *buf = mnd_emalloc(header->size);
if ((PASS == pfc->data->m.receive(pfc, vio, buf, header->size, conn_stats, error_info)) && buf[0] == ERROR_MARKER) {
php_mysqlnd_read_error_from_line(buf + 1, header->size - 1,
error_info->error, sizeof(error_info->error),
&error_info->error_no, error_info->sqlstate
);
mnd_efree(buf);
DBG_RETURN(FAIL);
}
mnd_efree(buf);
}
DBG_ERR_FMT("Logical link: packets out of order. Expected %u received %u. Packet size=%zu",
pfc->data->packet_no, header->packet_no, header->size);
php_error(E_WARNING, "Packets out of order. Expected %u received %u. Packet size=%zu",
pfc->data->packet_no, header->packet_no, header->size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ mysqlnd_read_packet_header_and_body */
static enum_func_status
mysqlnd_read_packet_header_and_body(MYSQLND_PACKET_HEADER * packet_header,
MYSQLND_PFC * pfc,
MYSQLND_VIO * vio,
MYSQLND_STATS * stats,
MYSQLND_ERROR_INFO * error_info,
MYSQLND_CONNECTION_STATE * connection_state,
zend_uchar * const buf, const size_t buf_size,
const char * const packet_type_as_text,
enum mysqlnd_packet_type packet_type)
{
DBG_ENTER("mysqlnd_read_packet_header_and_body");
DBG_INF_FMT("buf=%p size=%zu", buf, buf_size);
if (FAIL == mysqlnd_read_header(pfc, vio, packet_header, stats, error_info)) {
SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
if (error_info->error_no == 0) {
SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
}
DBG_ERR_FMT("Can't read %s's header", packet_type_as_text);
DBG_RETURN(FAIL);
}
if (buf_size < packet_header->size) {
DBG_ERR_FMT("Packet buffer %zu wasn't big enough %zu, %zu bytes will be unread",
buf_size, packet_header->size, packet_header->size - buf_size);
SET_CLIENT_ERROR(error_info, CR_INVALID_BUFFER_USE, UNKNOWN_SQLSTATE, "Packet buffer wasn't big enough; as a workaround consider increasing value of net_cmd_buffer_size");
DBG_RETURN(FAIL);
}
if (FAIL == pfc->data->m.receive(pfc, vio, buf, packet_header->size, stats, error_info)) {
SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
SET_CLIENT_ERROR(error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);
DBG_ERR_FMT("Empty '%s' packet body", packet_type_as_text);
DBG_RETURN(FAIL);
}
MYSQLND_INC_CONN_STATISTIC_W_VALUE2(stats, packet_type_to_statistic_byte_count[packet_type],
MYSQLND_HEADER_SIZE + packet_header->size,
packet_type_to_statistic_packet_count[packet_type],
1);
DBG_RETURN(PASS);
}
/* }}} */
/* {{{ php_mysqlnd_greet_read */
static enum_func_status
php_mysqlnd_greet_read(MYSQLND_CONN_DATA * conn, void * _packet)
{
const zend_uchar * pad_start = NULL;
MYSQLND_PACKET_GREET *packet= (MYSQLND_PACKET_GREET *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
const size_t buf_len = pfc->cmd_buffer.length;
zend_uchar * const buf = (zend_uchar *) pfc->cmd_buffer.buffer;
const zend_uchar * p = buf;
const zend_uchar * const begin = buf;
DBG_ENTER("php_mysqlnd_greet_read");
if (FAIL == mysqlnd_read_packet_header_and_body(&(packet->header), pfc, vio, stats, error_info, connection_state, buf, buf_len, "greeting", PROT_GREET_PACKET)) {
DBG_RETURN(FAIL);
}
BAIL_IF_NO_MORE_DATA;
packet->authentication_plugin_data.s = packet->intern_auth_plugin_data;
packet->authentication_plugin_data.l = sizeof(packet->intern_auth_plugin_data);
packet->protocol_version = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
if (ERROR_MARKER == packet->protocol_version) {
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error, sizeof(packet->error),
&packet->error_no, packet->sqlstate
);
/*
The server doesn't send sqlstate in the greet packet.
It's a bug#26426 , so we have to set it correctly ourselves.
It's probably "Too many connections, which has SQL state 08004".
*/
if (packet->error_no == 1040) {
memcpy(packet->sqlstate, "08004", MYSQLND_SQLSTATE_LENGTH);
}
DBG_RETURN(PASS);
}
/* MariaDB always sends 5.5.5 before version string: 5.5.5 was never released,
so just ignore it */
if (!strncmp((char *) p, MARIADB_RPL_VERSION_HACK, sizeof(MARIADB_RPL_VERSION_HACK) - 1)) {
p += sizeof(MARIADB_RPL_VERSION_HACK) - 1;
}
packet->server_version = estrdup((char *)p);
p+= strlen(packet->server_version) + 1; /* eat the '\0' */
BAIL_IF_NO_MORE_DATA;
packet->thread_id = uint4korr(p);
p+=4;
BAIL_IF_NO_MORE_DATA;
memcpy(packet->authentication_plugin_data.s, p, SCRAMBLE_LENGTH_323);
p+= SCRAMBLE_LENGTH_323;
BAIL_IF_NO_MORE_DATA;
/* pad1 */
p++;
BAIL_IF_NO_MORE_DATA;
packet->server_capabilities = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
DBG_INF_FMT("4.1 server_caps=%u\n", (uint32_t) packet->server_capabilities);
packet->charset_no = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
packet->server_status = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
/* pad2 */
pad_start = p;
p+= 13;
BAIL_IF_NO_MORE_DATA;
if ((size_t) (p - buf) < packet->header.size) {
/* auth_plugin_data is split into two parts */
memcpy(packet->authentication_plugin_data.s + SCRAMBLE_LENGTH_323, p, SCRAMBLE_LENGTH - SCRAMBLE_LENGTH_323);
p+= SCRAMBLE_LENGTH - SCRAMBLE_LENGTH_323;
p++; /* 0x0 at the end of the scramble and thus last byte in the packet in 5.1 and previous */
} else {
packet->pre41 = TRUE;
}
/* Is this a 5.5+ server ? */
if ((size_t) (p - buf) < packet->header.size) {
/* backtrack one byte, the 0x0 at the end of the scramble in 5.1 and previous */
p--;
/* Additional 16 bits for server capabilities */
DBG_INF_FMT("additional 5.5+ caps=%u\n", (uint32_t) uint2korr(pad_start));
packet->server_capabilities |= ((uint32_t) uint2korr(pad_start)) << 16;
/* And a length of the server scramble in one byte */
packet->authentication_plugin_data.l = uint1korr(pad_start + 2);
if (packet->authentication_plugin_data.l > SCRAMBLE_LENGTH) {
/* more data*/
char * new_auth_plugin_data = emalloc(packet->authentication_plugin_data.l);
/* copy what we already have */
memcpy(new_auth_plugin_data, packet->authentication_plugin_data.s, SCRAMBLE_LENGTH);
/* add additional scramble data 5.5+ sent us */
memcpy(new_auth_plugin_data + SCRAMBLE_LENGTH, p, packet->authentication_plugin_data.l - SCRAMBLE_LENGTH);
p+= (packet->authentication_plugin_data.l - SCRAMBLE_LENGTH);
packet->authentication_plugin_data.s = new_auth_plugin_data;
}
}
if (packet->server_capabilities & CLIENT_PLUGIN_AUTH) {
BAIL_IF_NO_MORE_DATA;
/* The server is 5.5.x and supports authentication plugins */
size_t remaining_size = packet->header.size - (size_t)(p - buf);
if (remaining_size == 0) {
/* Might be better to fail but this will fail anyway */
packet->auth_protocol = estrdup("");
} else {
/* Check if NUL present */
char *null_terminator = memchr(p, '\0', remaining_size);
size_t auth_protocol_len;
if (null_terminator) {
/* If present, do basically estrdup */
auth_protocol_len = null_terminator - (char *)p;
} else {
/* If not present, copy the rest of the buffer */
auth_protocol_len = remaining_size;
}
char *auth_protocol = emalloc(auth_protocol_len + 1);
memcpy(auth_protocol, p, auth_protocol_len);
auth_protocol[auth_protocol_len] = '\0';
packet->auth_protocol = auth_protocol;
p += auth_protocol_len;
if (null_terminator) {
p++;
}
}
}
DBG_INF_FMT("proto=%u server=%s thread_id=%u",
packet->protocol_version, packet->server_version, packet->thread_id);
DBG_INF_FMT("server_capabilities=%u charset_no=%u server_status=%i auth_protocol=%s scramble_length=%zu",
packet->server_capabilities, packet->charset_no, packet->server_status,
packet->auth_protocol? packet->auth_protocol:"n/a", packet->authentication_plugin_data.l);
DBG_RETURN(PASS);
premature_end:
DBG_ERR_FMT("GREET packet %zu bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL, E_WARNING, "GREET packet %zu bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_greet_free_mem */
static
void php_mysqlnd_greet_free_mem(void * _packet)
{
MYSQLND_PACKET_GREET *p= (MYSQLND_PACKET_GREET *) _packet;
if (p->server_version) {
efree(p->server_version);
p->server_version = NULL;
}
if (p->authentication_plugin_data.s && p->authentication_plugin_data.s != p->intern_auth_plugin_data) {
efree(p->authentication_plugin_data.s);
p->authentication_plugin_data.s = NULL;
}
if (p->auth_protocol) {
efree(p->auth_protocol);
p->auth_protocol = NULL;
}
}
/* }}} */
#define AUTH_WRITE_BUFFER_LEN (MYSQLND_HEADER_SIZE + MYSQLND_MAX_ALLOWED_USER_LEN + SCRAMBLE_LENGTH + MYSQLND_MAX_ALLOWED_DB_LEN + 1 + 4096)
/* {{{ php_mysqlnd_auth_write */
static
size_t php_mysqlnd_auth_write(MYSQLND_CONN_DATA * conn, void * _packet)
{
zend_uchar buffer[AUTH_WRITE_BUFFER_LEN];
zend_uchar *p = buffer + MYSQLND_HEADER_SIZE; /* start after the header */
size_t len;
MYSQLND_PACKET_AUTH * packet= (MYSQLND_PACKET_AUTH *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
DBG_ENTER("php_mysqlnd_auth_write");
if (!packet->is_change_user_packet) {
int4store(p, packet->client_flags);
p+= 4;
int4store(p, packet->max_packet_size);
p+= 4;
int1store(p, packet->charset_no);
p++;
memset(p, 0, 23); /* filler */
p+= 23;
}
if (packet->send_auth_data || packet->is_change_user_packet) {
len = MIN(strlen(packet->user), MYSQLND_MAX_ALLOWED_USER_LEN);
p = zend_mempcpy(p, packet->user, len);
*p++ = '\0';
/* defensive coding */
if (packet->auth_data == NULL) {
packet->auth_data_len = 0;
}
if (packet->auth_data_len > 0xFF) {
const char * const msg = "Authentication data too long. "
"Won't fit into the buffer and will be truncated. Authentication will thus fail";
SET_CLIENT_ERROR(error_info, CR_UNKNOWN_ERROR, UNKNOWN_SQLSTATE, msg);
php_error_docref(NULL, E_WARNING, "%s", msg);
DBG_RETURN(0);
}
int1store(p, (int8_t)packet->auth_data_len);
++p;
/*!!!!! is the buffer big enough ??? */
if (sizeof(buffer) < (packet->auth_data_len + (p - buffer))) {
DBG_ERR("the stack buffer was not enough!!");
DBG_RETURN(0);
}
if (packet->auth_data_len) {
p = zend_mempcpy(p, packet->auth_data, packet->auth_data_len);
}
if (packet->db_len > 0) {
/* CLIENT_CONNECT_WITH_DB should have been set */
size_t real_db_len = MIN(MYSQLND_MAX_ALLOWED_DB_LEN, packet->db_len);
p = zend_mempcpy(p, packet->db, real_db_len);
*p++= '\0';
} else if (packet->is_change_user_packet) {
*p++= '\0';
}
/* no \0 for no DB */
if (packet->is_change_user_packet) {
if (packet->charset_no) {
int2store(p, packet->charset_no);
p+= 2;
}
}
if (packet->auth_plugin_name) {
len = MIN(strlen(packet->auth_plugin_name), sizeof(buffer) - (p - buffer) - 1);
p = zend_mempcpy(p, packet->auth_plugin_name, len);
*p++= '\0';
}
if (packet->connect_attr && zend_hash_num_elements(packet->connect_attr)) {
size_t ca_payload_len = 0;
{
zend_string * key;
zval * entry_value;
ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(packet->connect_attr, key, entry_value) {
if (key) { /* HASH_KEY_IS_STRING */
size_t value_len = Z_STRLEN_P(entry_value);
ca_payload_len += php_mysqlnd_net_store_length_size(ZSTR_LEN(key));
ca_payload_len += ZSTR_LEN(key);
ca_payload_len += php_mysqlnd_net_store_length_size(value_len);
ca_payload_len += value_len;
}
} ZEND_HASH_FOREACH_END();
}
if (sizeof(buffer) >= (ca_payload_len + php_mysqlnd_net_store_length_size(ca_payload_len) + (p - buffer))) {
p = php_mysqlnd_net_store_length(p, ca_payload_len);
{
zend_string * key;
zval * entry_value;
ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(packet->connect_attr, key, entry_value) {
if (key) { /* HASH_KEY_IS_STRING */
size_t value_len = Z_STRLEN_P(entry_value);
/* copy key */
p = php_mysqlnd_net_store_length(p, ZSTR_LEN(key));
p = zend_mempcpy(p, ZSTR_VAL(key), ZSTR_LEN(key));
/* copy value */
p = php_mysqlnd_net_store_length(p, value_len);
p = zend_mempcpy(p, Z_STRVAL_P(entry_value), value_len);
}
} ZEND_HASH_FOREACH_END();
}
} else {
/* cannot put the data - skip */
}
}
}
if (packet->is_change_user_packet) {
enum_func_status ret = FAIL;
const MYSQLND_CSTRING payload = {(char*) buffer + MYSQLND_HEADER_SIZE, p - (buffer + MYSQLND_HEADER_SIZE)};
const unsigned int silent = packet->silent;
ret = conn->command->change_user(conn, payload, silent);
DBG_RETURN(ret == PASS? (p - buffer - MYSQLND_HEADER_SIZE) : 0);
} else {
/*
The auth handshake packet has no command in it. Thus we can't go over conn->command directly.
Well, we can have a command->no_command(conn, payload)
*/
const size_t sent = pfc->data->m.send(pfc, vio, buffer, p - buffer - MYSQLND_HEADER_SIZE, stats, error_info);
if (!sent) {
SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
}
DBG_RETURN(sent);
}
}
/* }}} */
/* {{{ php_mysqlnd_auth_response_read */
static enum_func_status
php_mysqlnd_auth_response_read(MYSQLND_CONN_DATA * conn, void * _packet)
{
MYSQLND_PACKET_AUTH_RESPONSE * packet= (MYSQLND_PACKET_AUTH_RESPONSE *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
const size_t buf_len = pfc->cmd_buffer.length;
zend_uchar * const buf = (zend_uchar *) pfc->cmd_buffer.buffer;
const zend_uchar * p = buf;
const zend_uchar * const begin = buf;
DBG_ENTER("php_mysqlnd_auth_response_read");
if (FAIL == mysqlnd_read_packet_header_and_body(&(packet->header), pfc, vio, stats, error_info, connection_state, buf, buf_len, "OK", PROT_OK_PACKET)) {
DBG_RETURN(FAIL);
}
BAIL_IF_NO_MORE_DATA;
/* Should be always 0x0 or ERROR_MARKER for error */
packet->response_code = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
if (ERROR_MARKER == packet->response_code) {
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error, sizeof(packet->error),
&packet->error_no, packet->sqlstate
);
DBG_RETURN(PASS);
}
if (0xFE == packet->response_code) {
/* Authentication Switch Response */
if (packet->header.size > (size_t) (p - buf)) {
packet->new_auth_protocol = mnd_pestrdup((char *)p, FALSE);
packet->new_auth_protocol_len = strlen(packet->new_auth_protocol);
p+= packet->new_auth_protocol_len + 1; /* +1 for the \0 */
packet->new_auth_protocol_data_len = packet->header.size - (size_t) (p - buf);
if (packet->new_auth_protocol_data_len) {
packet->new_auth_protocol_data = mnd_emalloc(packet->new_auth_protocol_data_len);
memcpy(packet->new_auth_protocol_data, p, packet->new_auth_protocol_data_len);
}
DBG_INF_FMT("The server requested switching auth plugin to : %s", packet->new_auth_protocol);
DBG_INF_FMT("Server salt : [%zu][%.*s]", packet->new_auth_protocol_data_len, (int) packet->new_auth_protocol_data_len, packet->new_auth_protocol_data);
}
} else {
zend_ulong net_len;
/* Everything was fine! */
packet->affected_rows = php_mysqlnd_net_field_length_ll(&p);
BAIL_IF_NO_MORE_DATA;
packet->last_insert_id = php_mysqlnd_net_field_length_ll(&p);
BAIL_IF_NO_MORE_DATA;
packet->server_status = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
packet->warning_count = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
/* There is a message */
if (packet->header.size > (size_t) (p - buf) && (net_len = php_mysqlnd_net_field_length(&p))) {
/* p can get past packet size when getting field length so it needs to be checked first
* and after that it can be checked that the net_len is not greater than the packet size */
if ((p - buf) > packet->header.size || packet->header.size - (p - buf) < net_len) {
DBG_ERR_FMT("OK packet message length is past the packet size");
php_error_docref(NULL, E_WARNING, "OK packet message length is past the packet size");
DBG_RETURN(FAIL);
}
packet->message_len = net_len;
packet->message = mnd_pestrndup((char *)p, packet->message_len, FALSE);
} else {
packet->message = NULL;
packet->message_len = 0;
}
DBG_INF_FMT("OK packet: aff_rows=%" PRIu64 " last_ins_id=%" PRIu64 " server_status=%u warnings=%u",
packet->affected_rows, packet->last_insert_id, packet->server_status,
packet->warning_count);
}
DBG_RETURN(PASS);
premature_end:
DBG_ERR_FMT("OK packet %zu bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL, E_WARNING, "AUTH_RESPONSE packet %zu bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_auth_response_free_mem */
static void
php_mysqlnd_auth_response_free_mem(void * _packet)
{
MYSQLND_PACKET_AUTH_RESPONSE * p = (MYSQLND_PACKET_AUTH_RESPONSE *) _packet;
if (p->message) {
mnd_efree(p->message);
p->message = NULL;
}
if (p->new_auth_protocol) {
mnd_efree(p->new_auth_protocol);
p->new_auth_protocol = NULL;
}
p->new_auth_protocol_len = 0;
if (p->new_auth_protocol_data) {
mnd_efree(p->new_auth_protocol_data);
p->new_auth_protocol_data = NULL;
}
p->new_auth_protocol_data_len = 0;
}
/* }}} */
/* {{{ php_mysqlnd_change_auth_response_write */
static size_t
php_mysqlnd_change_auth_response_write(MYSQLND_CONN_DATA * conn, void * _packet)
{
MYSQLND_PACKET_CHANGE_AUTH_RESPONSE *packet= (MYSQLND_PACKET_CHANGE_AUTH_RESPONSE *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
size_t total_packet_size = packet->auth_data_len + MYSQLND_HEADER_SIZE;
zend_uchar * const buffer = pfc->cmd_buffer.length >= total_packet_size? pfc->cmd_buffer.buffer : mnd_emalloc(total_packet_size);
zend_uchar * p = buffer + MYSQLND_HEADER_SIZE; /* start after the header */
DBG_ENTER("php_mysqlnd_change_auth_response_write");
if (packet->auth_data_len) {
p = zend_mempcpy(p, packet->auth_data, packet->auth_data_len);
}
{
/*
The auth handshake packet has no command in it. Thus we can't go over conn->command directly.
Well, we can have a command->no_command(conn, payload)
*/
const size_t sent = pfc->data->m.send(pfc, vio, buffer, p - buffer - MYSQLND_HEADER_SIZE, stats, error_info);
if (buffer != pfc->cmd_buffer.buffer) {
mnd_efree(buffer);
}
if (!sent) {
SET_CONNECTION_STATE(connection_state, CONN_QUIT_SENT);
}
DBG_RETURN(sent);
}
}
/* }}} */
/* {{{ php_mysqlnd_ok_read */
static enum_func_status
php_mysqlnd_ok_read(MYSQLND_CONN_DATA * conn, void * _packet)
{
MYSQLND_PACKET_OK *packet= (MYSQLND_PACKET_OK *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
const size_t buf_len = pfc->cmd_buffer.length;
zend_uchar * const buf = (zend_uchar *) pfc->cmd_buffer.buffer;
const zend_uchar * p = buf;
const zend_uchar * const begin = buf;
zend_ulong net_len;
DBG_ENTER("php_mysqlnd_ok_read");
if (FAIL == mysqlnd_read_packet_header_and_body(&(packet->header), pfc, vio, stats, error_info, connection_state, buf, buf_len, "OK", PROT_OK_PACKET)) {
DBG_RETURN(FAIL);
}
BAIL_IF_NO_MORE_DATA;
/* Should be always 0x0 or ERROR_MARKER for error */
packet->field_count = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
if (ERROR_MARKER == packet->field_count) {
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error, sizeof(packet->error),
&packet->error_no, packet->sqlstate
);
DBG_RETURN(PASS);
}
/* Everything was fine! */
packet->affected_rows = php_mysqlnd_net_field_length_ll(&p);
BAIL_IF_NO_MORE_DATA;
packet->last_insert_id = php_mysqlnd_net_field_length_ll(&p);
BAIL_IF_NO_MORE_DATA;
packet->server_status = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
packet->warning_count = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
/* There is a message */
if (packet->header.size > (size_t) (p - buf) && (net_len = php_mysqlnd_net_field_length(&p))) {
packet->message_len = MIN(net_len, buf_len - (p - begin));
packet->message = mnd_pestrndup((char *)p, packet->message_len, FALSE);
} else {
packet->message = NULL;
packet->message_len = 0;
}
DBG_INF_FMT("OK packet: aff_rows=%" PRIu64 " last_ins_id=%" PRIu64 " server_status=%u warnings=%u",
packet->affected_rows, packet->last_insert_id, packet->server_status,
packet->warning_count);
BAIL_IF_NO_MORE_DATA;
DBG_RETURN(PASS);
premature_end:
DBG_ERR_FMT("OK packet %zu bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL, E_WARNING, "OK packet %zu bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_ok_free_mem */
static void
php_mysqlnd_ok_free_mem(void * _packet)
{
MYSQLND_PACKET_OK *p= (MYSQLND_PACKET_OK *) _packet;
if (p->message) {
mnd_efree(p->message);
p->message = NULL;
}
}
/* }}} */
/* {{{ php_mysqlnd_eof_read */
static enum_func_status
php_mysqlnd_eof_read(MYSQLND_CONN_DATA * conn, void * _packet)
{
/*
EOF packet is since 4.1 five bytes long,
but we can get also an error, make it bigger.
Error : error_code + '#' + sqlstate + MYSQLND_ERRMSG_SIZE
*/
MYSQLND_PACKET_EOF *packet= (MYSQLND_PACKET_EOF *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;
const size_t buf_len = pfc->cmd_buffer.length;
zend_uchar * const buf = (zend_uchar *) pfc->cmd_buffer.buffer;
const zend_uchar * p = buf;
const zend_uchar * const begin = buf;
DBG_ENTER("php_mysqlnd_eof_read");
if (FAIL == mysqlnd_read_packet_header_and_body(&(packet->header), pfc, vio, stats, error_info, connection_state, buf, buf_len, "EOF", PROT_EOF_PACKET)) {
DBG_RETURN(FAIL);
}
BAIL_IF_NO_MORE_DATA;
/* Should be always EODATA_MARKER */
packet->field_count = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
if (ERROR_MARKER == packet->field_count) {
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error, sizeof(packet->error),
&packet->error_no, packet->sqlstate
);
DBG_RETURN(PASS);
}
/*
4.1 sends 1 byte EOF packet after metadata of
PREPARE/EXECUTE but 5 bytes after the result. This is not
according to the Docs@Forge!!!
*/
if (packet->header.size > 1) {
packet->warning_count = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
packet->server_status = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
} else {
packet->warning_count = 0;
packet->server_status = 0;
}
BAIL_IF_NO_MORE_DATA;
DBG_INF_FMT("EOF packet: fields=%u status=%u warnings=%u",
packet->field_count, packet->server_status, packet->warning_count);
DBG_RETURN(PASS);
premature_end:
DBG_ERR_FMT("EOF packet %zu bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL, E_WARNING, "EOF packet %zu bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_cmd_write */
size_t php_mysqlnd_cmd_write(MYSQLND_CONN_DATA * conn, void * _packet)
{
/* Let's have some space, which we can use, if not enough, we will allocate new buffer */
MYSQLND_PACKET_COMMAND * packet= (MYSQLND_PACKET_COMMAND *) _packet;
MYSQLND_ERROR_INFO * error_info = conn->error_info;
MYSQLND_PFC * pfc = conn->protocol_frame_codec;
MYSQLND_VIO * vio = conn->vio;
MYSQLND_STATS * stats = conn->stats;
MYSQLND_CONNECTION_STATE * connection_state = &conn->state;