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mysqlnd_wireprotocol.c
2160 lines (1861 loc) · 66.2 KB
/
mysqlnd_wireprotocol.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 2006-2013 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: |
| http://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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Georg Richter <georg@mysql.com> |
| Andrey Hristov <andrey@mysql.com> |
| Ulf Wendel <uwendel@mysql.com> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_globals.h"
#include "mysqlnd.h"
#include "mysqlnd_priv.h"
#include "mysqlnd_wireprotocol.h"
#include "mysqlnd_statistics.h"
#include "mysqlnd_debug.h"
#include "ext/standard/sha1.h"
#include "zend_ini.h"
#define MYSQLND_SILENT 1
#define MYSQLND_DUMP_HEADER_N_BODY
#define PACKET_READ_HEADER_AND_BODY(packet, conn, buf, buf_size, packet_type_as_text, packet_type) \
{ \
DBG_INF_FMT("buf=%p size=%u", (buf), (buf_size)); \
if (FAIL == mysqlnd_read_header((conn), &((packet)->header) TSRMLS_CC)) {\
CONN_SET_STATE(conn, CONN_QUIT_SENT); \
SET_CLIENT_ERROR(conn->error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);\
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", 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 %u wasn't big enough %u, %u bytes will be unread", \
(buf_size), (packet)->header.size, (packet)->header.size - (buf_size)); \
DBG_RETURN(FAIL); \
}\
if (FAIL == conn->net->m.receive((conn), (buf), (packet)->header.size TSRMLS_CC)) { \
CONN_SET_STATE(conn, CONN_QUIT_SENT); \
SET_CLIENT_ERROR(conn->error_info, CR_SERVER_GONE_ERROR, UNKNOWN_SQLSTATE, mysqlnd_server_gone);\
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", mysqlnd_server_gone); \
DBG_ERR_FMT("Empty '%s' packet body", (packet_type_as_text)); \
DBG_RETURN(FAIL);\
} \
MYSQLND_INC_CONN_STATISTIC_W_VALUE2(conn->stats, packet_type_to_statistic_byte_count[packet_type], \
MYSQLND_HEADER_SIZE + (packet)->header.size, \
packet_type_to_statistic_packet_count[packet_type], \
1); \
}
#define BAIL_IF_NO_MORE_DATA \
if ((size_t)(p - begin) > packet->header.size) { \
php_error_docref(NULL TSRMLS_CC, 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
/* {{{ 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"
};
/* }}} */
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 */
unsigned long
php_mysqlnd_net_field_length(zend_uchar **packet)
{
register zend_uchar *p= (zend_uchar *)*packet;
if (*p < 251) {
(*packet)++;
return (unsigned long) *p;
}
switch (*p) {
case 251:
(*packet)++;
return MYSQLND_NULL_LENGTH;
case 252:
(*packet) += 3;
return (unsigned long) uint2korr(p+1);
case 253:
(*packet) += 4;
return (unsigned long) uint3korr(p+1);
default:
(*packet) += 9;
return (unsigned long) uint4korr(p+1);
}
}
/* }}} */
/* {{{ php_mysqlnd_net_field_length_ll
Get next field's length */
uint64_t
php_mysqlnd_net_field_length_ll(zend_uchar **packet)
{
register 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, 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,(ulong) length);
return packet + 3;
}
*packet++ = 254;
int8store(packet, length);
return packet + 8;
}
/* }}} */
/* {{{ php_mysqlnd_read_error_from_line */
static enum_func_status
php_mysqlnd_read_error_from_line(zend_uchar *buf, size_t buf_len,
char *error, int error_buf_len,
unsigned int *error_no, char *sqlstate TSRMLS_DC)
{
zend_uchar *p = buf;
int 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 * conn, MYSQLND_PACKET_HEADER * header TSRMLS_DC)
{
MYSQLND_NET * net = conn->net;
zend_uchar buffer[MYSQLND_HEADER_SIZE];
DBG_ENTER("mysqlnd_read_header_name");
DBG_INF_FMT("compressed=%u conn_id=%u", net->compressed, conn->thread_id);
if (FAIL == net->m.receive(conn, buffer, MYSQLND_HEADER_SIZE TSRMLS_CC)) {
DBG_RETURN(FAIL);
}
header->size = uint3korr(buffer);
header->packet_no = uint1korr(buffer + 3);
#ifdef MYSQLND_DUMP_HEADER_N_BODY
DBG_INF_FMT("HEADER: prot_packet_no=%u size=%3u", header->packet_no, header->size);
#endif
MYSQLND_INC_CONN_STATISTIC_W_VALUE2(conn->stats,
STAT_PROTOCOL_OVERHEAD_IN, MYSQLND_HEADER_SIZE,
STAT_PACKETS_RECEIVED, 1);
if (net->compressed || net->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.
*/
net->packet_no++;
DBG_RETURN(PASS);
}
DBG_ERR_FMT("Logical link: packets out of order. Expected %u received %u. Packet size="MYSQLND_SZ_T_SPEC,
net->packet_no, header->packet_no, header->size);
php_error(E_WARNING, "Packets out of order. Expected %u received %u. Packet size="MYSQLND_SZ_T_SPEC,
net->packet_no, header->packet_no, header->size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_greet_read */
static enum_func_status
php_mysqlnd_greet_read(void *_packet, MYSQLND *conn TSRMLS_DC)
{
zend_uchar buf[2048];
zend_uchar *p = buf;
zend_uchar *begin = buf;
MYSQLND_PACKET_GREET *packet= (MYSQLND_PACKET_GREET *) _packet;
DBG_ENTER("php_mysqlnd_greet_read");
PACKET_READ_HEADER_AND_BODY(packet, conn, buf, sizeof(buf), "greeting", PROT_GREET_PACKET);
BAIL_IF_NO_MORE_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
TSRMLS_CC);
/*
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);
}
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->scramble_buf, p, SCRAMBLE_LENGTH_323);
p+= 8;
BAIL_IF_NO_MORE_DATA;
/* pad1 */
p++;
BAIL_IF_NO_MORE_DATA;
packet->server_capabilities = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
packet->charset_no = uint1korr(p);
p++;
BAIL_IF_NO_MORE_DATA;
packet->server_status = uint2korr(p);
p+= 2;
BAIL_IF_NO_MORE_DATA;
/* pad2 */
p+= 13;
BAIL_IF_NO_MORE_DATA;
if ((size_t) (p - buf) < packet->header.size) {
/* scramble_buf is split into two parts */
memcpy(packet->scramble_buf + SCRAMBLE_LENGTH_323,
p, SCRAMBLE_LENGTH - SCRAMBLE_LENGTH_323);
} else {
packet->pre41 = TRUE;
}
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",
packet->server_capabilities, packet->charset_no, packet->server_status);
DBG_RETURN(PASS);
premature_end:
DBG_ERR_FMT("GREET packet %d bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "GREET packet "MYSQLND_SZ_T_SPEC" 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, zend_bool stack_allocation TSRMLS_DC)
{
MYSQLND_PACKET_GREET *p= (MYSQLND_PACKET_GREET *) _packet;
if (p->server_version) {
efree(p->server_version);
p->server_version = NULL;
}
if (!stack_allocation) {
mnd_pefree(p, p->header.persistent);
}
}
/* }}} */
/* {{{ php_mysqlnd_crypt */
static void
php_mysqlnd_crypt(zend_uchar *buffer, const zend_uchar *s1, const zend_uchar *s2, size_t len)
{
const zend_uchar *s1_end = s1 + len;
while (s1 < s1_end) {
*buffer++= *s1++ ^ *s2++;
}
}
/* }}} */
/* {{{ php_mysqlnd_scramble */
void php_mysqlnd_scramble(zend_uchar * const buffer, const zend_uchar * const scramble, const zend_uchar * const password)
{
PHP_SHA1_CTX context;
zend_uchar sha1[SHA1_MAX_LENGTH];
zend_uchar sha2[SHA1_MAX_LENGTH];
/* Phase 1: hash password */
PHP_SHA1Init(&context);
PHP_SHA1Update(&context, password, strlen((char *)password));
PHP_SHA1Final(sha1, &context);
/* Phase 2: hash sha1 */
PHP_SHA1Init(&context);
PHP_SHA1Update(&context, (zend_uchar*)sha1, SHA1_MAX_LENGTH);
PHP_SHA1Final(sha2, &context);
/* Phase 3: hash scramble + sha2 */
PHP_SHA1Init(&context);
PHP_SHA1Update(&context, scramble, SCRAMBLE_LENGTH);
PHP_SHA1Update(&context, (zend_uchar*)sha2, SHA1_MAX_LENGTH);
PHP_SHA1Final(buffer, &context);
/* let's crypt buffer now */
php_mysqlnd_crypt(buffer, (const zend_uchar *)buffer, (const zend_uchar *)sha1, SHA1_MAX_LENGTH);
}
/* }}} */
#define AUTH_WRITE_BUFFER_LEN (MYSQLND_HEADER_SIZE + MYSQLND_MAX_ALLOWED_USER_LEN + SHA1_MAX_LENGTH + MYSQLND_MAX_ALLOWED_DB_LEN + 1 + 128)
/* {{{ php_mysqlnd_auth_write */
static
size_t php_mysqlnd_auth_write(void *_packet, MYSQLND * conn TSRMLS_DC)
{
char buffer[AUTH_WRITE_BUFFER_LEN];
register char *p= buffer + MYSQLND_HEADER_SIZE; /* start after the header */
int len;
register MYSQLND_PACKET_AUTH *packet= (MYSQLND_PACKET_AUTH *) _packet;
DBG_ENTER("php_mysqlnd_auth_write");
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_half_packet) {
len = MIN(strlen(packet->user), MYSQLND_MAX_ALLOWED_USER_LEN);
memcpy(p, packet->user, len);
p+= len;
*p++ = '\0';
/* copy scrambled pass*/
if (packet->password && packet->password[0]) {
/* In 4.1 we use CLIENT_SECURE_CONNECTION and thus the len of the buf should be passed */
int1store(p, SHA1_MAX_LENGTH);
p++;
php_mysqlnd_scramble((zend_uchar*)p, packet->server_scramble_buf, (zend_uchar*)packet->password);
p+= SHA1_MAX_LENGTH;
} else {
/* Zero length */
int1store(p, 0);
p++;
}
if (packet->db) {
size_t real_db_len = MIN(MYSQLND_MAX_ALLOWED_DB_LEN, packet->db_len);
memcpy(p, packet->db, real_db_len);
p+= real_db_len;
*p++= '\0';
}
/* Handle CLIENT_CONNECT_WITH_DB */
/* no \0 for no DB */
}
DBG_RETURN(conn->net->m.send(conn, buffer, p - buffer - MYSQLND_HEADER_SIZE TSRMLS_CC));
}
/* }}} */
/* {{{ php_mysqlnd_auth_free_mem */
static
void php_mysqlnd_auth_free_mem(void *_packet, zend_bool stack_allocation TSRMLS_DC)
{
if (!stack_allocation) {
MYSQLND_PACKET_AUTH * p = (MYSQLND_PACKET_AUTH *) _packet;
mnd_pefree(p, p->header.persistent);
}
}
/* }}} */
#define OK_BUFFER_SIZE 2048
/* {{{ php_mysqlnd_ok_read */
static enum_func_status
php_mysqlnd_ok_read(void *_packet, MYSQLND *conn TSRMLS_DC)
{
zend_uchar local_buf[OK_BUFFER_SIZE];
size_t buf_len = conn->net->cmd_buffer.buffer? conn->net->cmd_buffer.length : OK_BUFFER_SIZE;
zend_uchar *buf = conn->net->cmd_buffer.buffer? (zend_uchar *) conn->net->cmd_buffer.buffer : local_buf;
zend_uchar *p = buf;
zend_uchar *begin = buf;
unsigned long i;
register MYSQLND_PACKET_OK *packet= (MYSQLND_PACKET_OK *) _packet;
DBG_ENTER("php_mysqlnd_ok_read");
PACKET_READ_HEADER_AND_BODY(packet, conn, buf, buf_len, "OK", PROT_OK_PACKET);
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
TSRMLS_CC);
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) && (i = php_mysqlnd_net_field_length(&p))) {
packet->message_len = MIN(i, 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=%lld last_ins_id=%ld 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 %d bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "OK packet "MYSQLND_SZ_T_SPEC" 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, zend_bool stack_allocation TSRMLS_DC)
{
MYSQLND_PACKET_OK *p= (MYSQLND_PACKET_OK *) _packet;
if (p->message) {
mnd_efree(p->message);
p->message = NULL;
}
if (!stack_allocation) {
mnd_pefree(p, p->header.persistent);
}
}
/* }}} */
/* {{{ php_mysqlnd_eof_read */
static enum_func_status
php_mysqlnd_eof_read(void *_packet, MYSQLND *conn TSRMLS_DC)
{
/*
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;
size_t buf_len = conn->net->cmd_buffer.length;
zend_uchar *buf = (zend_uchar *) conn->net->cmd_buffer.buffer;
zend_uchar *p = buf;
zend_uchar *begin = buf;
DBG_ENTER("php_mysqlnd_eof_read");
PACKET_READ_HEADER_AND_BODY(packet, conn, buf, buf_len, "EOF", PROT_EOF_PACKET);
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
TSRMLS_CC);
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 %d bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "EOF packet "MYSQLND_SZ_T_SPEC" bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_eof_free_mem */
static
void php_mysqlnd_eof_free_mem(void *_packet, zend_bool stack_allocation TSRMLS_DC)
{
if (!stack_allocation) {
mnd_pefree(_packet, ((MYSQLND_PACKET_EOF *)_packet)->header.persistent);
}
}
/* }}} */
/* {{{ php_mysqlnd_cmd_write */
size_t php_mysqlnd_cmd_write(void *_packet, MYSQLND *conn TSRMLS_DC)
{
/* 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_NET *net = conn->net;
unsigned int error_reporting = EG(error_reporting);
size_t written = 0;
DBG_ENTER("php_mysqlnd_cmd_write");
/*
Reset packet_no, or we will get bad handshake!
Every command starts a new TX and packet numbers are reset to 0.
*/
net->packet_no = 0;
net->compressed_envelope_packet_no = 0; /* this is for the response */
if (error_reporting) {
EG(error_reporting) = 0;
}
MYSQLND_INC_CONN_STATISTIC(conn->stats, STAT_PACKETS_SENT_CMD);
#ifdef MYSQLND_DO_WIRE_CHECK_BEFORE_COMMAND
net->m.consume_uneaten_data(net, packet->command TSRMLS_CC);
#endif
if (!packet->argument || !packet->arg_len) {
char buffer[MYSQLND_HEADER_SIZE + 1];
int1store(buffer + MYSQLND_HEADER_SIZE, packet->command);
written = conn->net->m.send(conn, buffer, 1 TSRMLS_CC);
} else {
size_t tmp_len = packet->arg_len + 1 + MYSQLND_HEADER_SIZE, ret;
zend_uchar *tmp, *p;
tmp = (tmp_len > net->cmd_buffer.length)? mnd_emalloc(tmp_len):net->cmd_buffer.buffer;
if (!tmp) {
goto end;
}
p = tmp + MYSQLND_HEADER_SIZE; /* skip the header */
int1store(p, packet->command);
p++;
memcpy(p, packet->argument, packet->arg_len);
ret = conn->net->m.send(conn, (char *)tmp, tmp_len - MYSQLND_HEADER_SIZE TSRMLS_CC);
if (tmp != net->cmd_buffer.buffer) {
MYSQLND_INC_CONN_STATISTIC(conn->stats, STAT_CMD_BUFFER_TOO_SMALL);
mnd_efree(tmp);
}
written = ret;
}
end:
if (error_reporting) {
/* restore error reporting */
EG(error_reporting) = error_reporting;
}
DBG_RETURN(written);
}
/* }}} */
/* {{{ php_mysqlnd_cmd_free_mem */
static
void php_mysqlnd_cmd_free_mem(void *_packet, zend_bool stack_allocation TSRMLS_DC)
{
if (!stack_allocation) {
MYSQLND_PACKET_COMMAND * p = (MYSQLND_PACKET_COMMAND *) _packet;
mnd_pefree(p, p->header.persistent);
}
}
/* }}} */
/* {{{ php_mysqlnd_rset_header_read */
static enum_func_status
php_mysqlnd_rset_header_read(void *_packet, MYSQLND *conn TSRMLS_DC)
{
enum_func_status ret = PASS;
size_t buf_len = conn->net->cmd_buffer.length;
zend_uchar *buf = (zend_uchar *) conn->net->cmd_buffer.buffer;
zend_uchar *p = buf;
zend_uchar *begin = buf;
size_t len;
MYSQLND_PACKET_RSET_HEADER *packet= (MYSQLND_PACKET_RSET_HEADER *) _packet;
DBG_ENTER("php_mysqlnd_rset_header_read");
PACKET_READ_HEADER_AND_BODY(packet, conn, buf, buf_len, "resultset header", PROT_RSET_HEADER_PACKET);
BAIL_IF_NO_MORE_DATA;
/*
Don't increment. First byte is ERROR_MARKER on error, but otherwise is starting byte
of encoded sequence for length.
*/
if (ERROR_MARKER == *p) {
/* Error */
p++;
BAIL_IF_NO_MORE_DATA;
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error_info.error, sizeof(packet->error_info.error),
&packet->error_info.error_no, packet->error_info.sqlstate
TSRMLS_CC);
DBG_RETURN(PASS);
}
packet->field_count = php_mysqlnd_net_field_length(&p);
BAIL_IF_NO_MORE_DATA;
switch (packet->field_count) {
case MYSQLND_NULL_LENGTH:
DBG_INF("LOAD LOCAL");
/*
First byte in the packet is the field count.
Thus, the name is size - 1. And we add 1 for a trailing \0.
Because we have BAIL_IF_NO_MORE_DATA before the switch, we are guaranteed
that packet->header.size is > 0. Which means that len can't underflow, that
would lead to 0 byte allocation but 2^32 or 2^64 bytes copied.
*/
len = packet->header.size - 1;
packet->info_or_local_file = mnd_emalloc(len + 1);
if (packet->info_or_local_file) {
memcpy(packet->info_or_local_file, p, len);
packet->info_or_local_file[len] = '\0';
packet->info_or_local_file_len = len;
} else {
SET_OOM_ERROR(conn->error_info);
ret = FAIL;
}
break;
case 0x00:
DBG_INF("UPSERT");
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;
/* Check for additional textual data */
if (packet->header.size > (size_t) (p - buf) && (len = php_mysqlnd_net_field_length(&p))) {
packet->info_or_local_file = mnd_emalloc(len + 1);
if (packet->info_or_local_file) {
memcpy(packet->info_or_local_file, p, len);
packet->info_or_local_file[len] = '\0';
packet->info_or_local_file_len = len;
} else {
SET_OOM_ERROR(conn->error_info);
ret = FAIL;
}
}
DBG_INF_FMT("affected_rows=%llu last_insert_id=%llu server_status=%u warning_count=%u",
packet->affected_rows, packet->last_insert_id,
packet->server_status, packet->warning_count);
break;
default:
DBG_INF("SELECT");
/* Result set */
break;
}
BAIL_IF_NO_MORE_DATA;
DBG_RETURN(ret);
premature_end:
DBG_ERR_FMT("RSET_HEADER packet %d bytes shorter than expected", p - begin - packet->header.size);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "RSET_HEADER packet "MYSQLND_SZ_T_SPEC" bytes shorter than expected",
p - begin - packet->header.size);
DBG_RETURN(FAIL);
}
/* }}} */
/* {{{ php_mysqlnd_rset_header_free_mem */
static
void php_mysqlnd_rset_header_free_mem(void *_packet, zend_bool stack_allocation TSRMLS_DC)
{
MYSQLND_PACKET_RSET_HEADER *p= (MYSQLND_PACKET_RSET_HEADER *) _packet;
DBG_ENTER("php_mysqlnd_rset_header_free_mem");
if (p->info_or_local_file) {
mnd_efree(p->info_or_local_file);
p->info_or_local_file = NULL;
}
if (!stack_allocation) {
mnd_pefree(p, p->header.persistent);
}
DBG_VOID_RETURN;
}
/* }}} */
static size_t rset_field_offsets[] =
{
STRUCT_OFFSET(MYSQLND_FIELD, catalog),
STRUCT_OFFSET(MYSQLND_FIELD, catalog_length),
STRUCT_OFFSET(MYSQLND_FIELD, db),
STRUCT_OFFSET(MYSQLND_FIELD, db_length),
STRUCT_OFFSET(MYSQLND_FIELD, table),
STRUCT_OFFSET(MYSQLND_FIELD, table_length),
STRUCT_OFFSET(MYSQLND_FIELD, org_table),
STRUCT_OFFSET(MYSQLND_FIELD, org_table_length),
STRUCT_OFFSET(MYSQLND_FIELD, name),
STRUCT_OFFSET(MYSQLND_FIELD, name_length),
STRUCT_OFFSET(MYSQLND_FIELD, org_name),
STRUCT_OFFSET(MYSQLND_FIELD, org_name_length)
};
/* {{{ php_mysqlnd_rset_field_read */
static enum_func_status
php_mysqlnd_rset_field_read(void *_packet, MYSQLND *conn TSRMLS_DC)
{
/* Should be enough for the metadata of a single row */
MYSQLND_PACKET_RES_FIELD *packet= (MYSQLND_PACKET_RES_FIELD *) _packet;
size_t buf_len = conn->net->cmd_buffer.length, total_len = 0;
zend_uchar *buf = (zend_uchar *) conn->net->cmd_buffer.buffer;
zend_uchar *p = buf;
zend_uchar *begin = buf;
char *root_ptr;
unsigned long len;
MYSQLND_FIELD *meta;
unsigned int i, field_count = sizeof(rset_field_offsets)/sizeof(size_t);
DBG_ENTER("php_mysqlnd_rset_field_read");
PACKET_READ_HEADER_AND_BODY(packet, conn, buf, buf_len, "field", PROT_RSET_FLD_PACKET);
if (packet->skip_parsing) {
DBG_RETURN(PASS);
}
BAIL_IF_NO_MORE_DATA;
if (ERROR_MARKER == *p) {
/* Error */
p++;
BAIL_IF_NO_MORE_DATA;
php_mysqlnd_read_error_from_line(p, packet->header.size - 1,
packet->error_info.error, sizeof(packet->error_info.error),
&packet->error_info.error_no, packet->error_info.sqlstate
TSRMLS_CC);
DBG_ERR_FMT("Server error : (%u) %s", packet->error_info.error_no, packet->error_info.error);
DBG_RETURN(PASS);
} else if (EODATA_MARKER == *p && packet->header.size < 8) {
/* Premature EOF. That should be COM_FIELD_LIST */
DBG_INF("Premature EOF. That should be COM_FIELD_LIST");
packet->stupid_list_fields_eof = TRUE;
DBG_RETURN(PASS);
}
meta = packet->metadata;
for (i = 0; i < field_count; i += 2) {
len = php_mysqlnd_net_field_length(&p);
BAIL_IF_NO_MORE_DATA;
switch ((len)) {
case 0:
*(const char **)(((char*)meta) + rset_field_offsets[i]) = mysqlnd_empty_string;
*(unsigned int *)(((char*)meta) + rset_field_offsets[i+1]) = 0;
break;
case MYSQLND_NULL_LENGTH:
goto faulty_or_fake;
default:
*(const char **)(((char *)meta) + rset_field_offsets[i]) = (const char *)p;
*(unsigned int *)(((char*)meta) + rset_field_offsets[i+1]) = len;
p += len;
total_len += len + 1;
break;
}
BAIL_IF_NO_MORE_DATA;
}
/* 1 byte length */
if (12 != *p) {
DBG_ERR_FMT("Protocol error. Server sent false length. Expected 12 got %d", (int) *p);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Protocol error. Server sent false length. Expected 12");
}
p++;
BAIL_IF_NO_MORE_DATA;
meta->charsetnr = uint2korr(p);
p += 2;
BAIL_IF_NO_MORE_DATA;
meta->length = uint4korr(p);
p += 4;
BAIL_IF_NO_MORE_DATA;
meta->type = uint1korr(p);
p += 1;
BAIL_IF_NO_MORE_DATA;
meta->flags = uint2korr(p);
p += 2;
BAIL_IF_NO_MORE_DATA;
meta->decimals = uint1korr(p);
p += 1;
BAIL_IF_NO_MORE_DATA;
/* 2 byte filler */
p +=2;
BAIL_IF_NO_MORE_DATA;
/* Should we set NUM_FLAG (libmysql does it) ? */
if (
(meta->type <= MYSQL_TYPE_INT24 &&
(meta->type != MYSQL_TYPE_TIMESTAMP || meta->length == 14 || meta->length == 8)
) || meta->type == MYSQL_TYPE_YEAR)
{
meta->flags |= NUM_FLAG;
}