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swoole_mysql_coro.h
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/* +----------------------------------------------------------------------+ | Swoole | +----------------------------------------------------------------------+ | Copyright (c) 2012-2015 The Swoole Group | +----------------------------------------------------------------------+ | This source file is subject to version 2.0 of the Apache 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.apache.org/licenses/LICENSE-2.0.html | | If you did not receive a copy of the Apache2.0 license and are unable| | to obtain it through the world-wide-web, please send a note to | | license@swoole.com so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Author: Tianfeng Han <mikan.tenny@gmail.com> | +----------------------------------------------------------------------+ */ #ifndef SWOOLE_MYSQL_H_ #define SWOOLE_MYSQL_H_ #include "php_swoole.h" BEGIN_EXTERN_C() #ifdef SW_USE_MYSQLND #include "ext/mysqlnd/mysqlnd.h" #include "ext/mysqlnd/mysqlnd_charset.h" #endif #ifdef SW_USE_OPENSSL #ifndef OPENSSL_NO_RSA #define SW_MYSQL_RSA_SUPPORT #endif #endif //#define SW_MYSQL_DEBUG enum mysql_command { SW_MYSQL_COM_NULL = -1, SW_MYSQL_COM_SLEEP = 0, SW_MYSQL_COM_QUIT, SW_MYSQL_COM_INIT_DB, SW_MYSQL_COM_QUERY = 3, SW_MYSQL_COM_FIELD_LIST, SW_MYSQL_COM_CREATE_DB, SW_MYSQL_COM_DROP_DB, SW_MYSQL_COM_REFRESH, SW_MYSQL_COM_SHUTDOWN, SW_MYSQL_COM_STATISTICS, SW_MYSQL_COM_PROCESS_INFO, SW_MYSQL_COM_CONNECT, SW_MYSQL_COM_PROCESS_KILL, SW_MYSQL_COM_DEBUG, SW_MYSQL_COM_PING, SW_MYSQL_COM_TIME, SW_MYSQL_COM_DELAYED_INSERT, SW_MYSQL_COM_CHANGE_USER, SW_MYSQL_COM_BINLOG_DUMP, SW_MYSQL_COM_TABLE_DUMP, SW_MYSQL_COM_CONNECT_OUT, SW_MYSQL_COM_REGISTER_SLAVE, SW_MYSQL_COM_STMT_PREPARE, SW_MYSQL_COM_STMT_EXECUTE, SW_MYSQL_COM_STMT_SEND_LONG_DATA, SW_MYSQL_COM_STMT_CLOSE, SW_MYSQL_COM_STMT_RESET, SW_MYSQL_COM_SET_OPTION, SW_MYSQL_COM_STMT_FETCH, SW_MYSQL_COM_DAEMON, SW_MYSQL_COM_END }; enum mysql_handshake_state { SW_MYSQL_HANDSHAKE_WAIT_REQUEST, SW_MYSQL_HANDSHAKE_WAIT_SWITCH, SW_MYSQL_HANDSHAKE_WAIT_SIGNATURE, SW_MYSQL_HANDSHAKE_WAIT_RSA, SW_MYSQL_HANDSHAKE_WAIT_RESULT, SW_MYSQL_HANDSHAKE_COMPLETED, }; enum mysql_auth_signature { SW_MYSQL_AUTH_SIGNATURE_ERROR = 0x00, // get signature failed SW_MYSQL_AUTH_SIGNATURE = 0x01, SW_MYSQL_AUTH_SIGNATURE_RSA_PREPARED = 0x02, SW_MYSQL_AUTH_SIGNATURE_SUCCESS = 0x03, SW_MYSQL_AUTH_SIGNATURE_FULL_AUTH_REQUIRED = 0x04, //rsa required }; // nonce: a number or bit string used only once, in security engineering // other names on doc: challenge/scramble/salt #define SW_MYSQL_NONCE_LENGTH 20 enum mysql_read_state { SW_MYSQL_STATE_QUERY, SW_MYSQL_STATE_READ_START, SW_MYSQL_STATE_READ_FIELD, SW_MYSQL_STATE_READ_ROW, SW_MYSQL_STATE_READ_PARAM, SW_MYSQL_STATE_READ_END, SW_MYSQL_STATE_CLOSED, }; enum mysql_error_code { // FIXME: if it should be bigger than SW_ABORT? // may be in conflict with SW_xxx err code. SW_MYSQL_ERR_PROTOCOL_ERROR = 1, SW_MYSQL_ERR_BUFFER_OVERSIZE, SW_MYSQL_ERR_PACKET_CORRUPT, SW_MYSQL_ERR_WANT_READ, SW_MYSQL_ERR_WANT_WRITE, SW_MYSQL_ERR_UNKNOWN_ERROR, SW_MYSQL_ERR_MYSQL_ERROR, SW_MYSQL_ERR_SERVER_LOST, SW_MYSQL_ERR_BAD_PORT, SW_MYSQL_ERR_RESOLV_HOST, SW_MYSQL_ERR_SYSTEM, SW_MYSQL_ERR_CANT_CONNECT, SW_MYSQL_ERR_BUFFER_TOO_SMALL, SW_MYSQL_ERR_UNEXPECT_R_STATE, SW_MYSQL_ERR_STRFIELD_CORRUPT, SW_MYSQL_ERR_BINFIELD_CORRUPT, SW_MYSQL_ERR_BAD_LCB, SW_MYSQL_ERR_LEN_OVER_BUFFER, SW_MYSQL_ERR_CONVLONG, SW_MYSQL_ERR_CONVLONGLONG, SW_MYSQL_ERR_CONVFLOAT, SW_MYSQL_ERR_CONVDOUBLE, SW_MYSQL_ERR_CONVTIME, SW_MYSQL_ERR_CONVTIMESTAMP, SW_MYSQL_ERR_CONVDATE }; enum mysql_field_types { SW_MYSQL_TYPE_DECIMAL, SW_MYSQL_TYPE_TINY, SW_MYSQL_TYPE_SHORT, SW_MYSQL_TYPE_LONG, SW_MYSQL_TYPE_FLOAT, SW_MYSQL_TYPE_DOUBLE, SW_MYSQL_TYPE_NULL, SW_MYSQL_TYPE_TIMESTAMP, SW_MYSQL_TYPE_LONGLONG, SW_MYSQL_TYPE_INT24, SW_MYSQL_TYPE_DATE, SW_MYSQL_TYPE_TIME, SW_MYSQL_TYPE_DATETIME, SW_MYSQL_TYPE_YEAR, SW_MYSQL_TYPE_NEWDATE, SW_MYSQL_TYPE_VARCHAR, SW_MYSQL_TYPE_BIT, SW_MYSQL_TYPE_JSON = 245, SW_MYSQL_TYPE_NEWDECIMAL = 246, SW_MYSQL_TYPE_ENUM = 247, SW_MYSQL_TYPE_SET = 248, SW_MYSQL_TYPE_TINY_BLOB = 249, SW_MYSQL_TYPE_MEDIUM_BLOB = 250, SW_MYSQL_TYPE_LONG_BLOB = 251, SW_MYSQL_TYPE_BLOB = 252, SW_MYSQL_TYPE_VAR_STRING = 253, SW_MYSQL_TYPE_STRING = 254, SW_MYSQL_TYPE_GEOMETRY = 255 }; #ifdef SW_COROUTINE typedef enum { SW_MYSQL_CORO_STATUS_CLOSED, SW_MYSQL_CORO_STATUS_READY, SW_MYSQL_CORO_STATUS_WAIT, SW_MYSQL_CORO_STATUS_DONE } mysql_io_status; #endif // ref: https://dev.mysql.com/doc/dev/mysql-server/8.0.0/group__group__cs__capabilities__flags.html // use regex: "\#define[ ]+(CLIENT_[A-Z_\d]+)[ ]+(\(?[\dA-Z <]+\)?)\n[ ]+?[ ]+([\s\S ]+?\.) More\.\.\.\n?" // to "SW_MYSQL_$1 = $2, /* $3 */" enum mysql_client_capability_flags { SW_MYSQL_CLIENT_LONG_PASSWORD = 1, /* Use the improved version of Old Password Authentication. */ SW_MYSQL_CLIENT_FOUND_ROWS = 2, /* Send found rows instead of affected rows in EOF_Packet. */ SW_MYSQL_CLIENT_LONG_FLAG = 4, /* Get all column flags. */ SW_MYSQL_CLIENT_CONNECT_WITH_DB = 8, /* Database (schema) name can be specified on connect in Handshake Response Packet. */ SW_MYSQL_CLIENT_NO_SCHEMA = 16, /* Don't allow database.table.column. */ SW_MYSQL_CLIENT_COMPRESS = 32, /* Compression protocol supported. */ SW_MYSQL_CLIENT_ODBC = 64, /* Special handling of ODBC behavior. */ SW_MYSQL_CLIENT_LOCAL_FILES = 128, /* Can use LOAD DATA LOCAL. */ SW_MYSQL_CLIENT_IGNORE_SPACE = 256, /* Ignore spaces before '('. */ SW_MYSQL_CLIENT_PROTOCOL_41 = 512, /* New 4.1 protocol. */ SW_MYSQL_CLIENT_INTERACTIVE = 1024, /* This is an interactive client. */ SW_MYSQL_CLIENT_SSL = 2048, /* Use SSL encryption for the session. */ SW_MYSQL_CLIENT_IGNORE_SIGPIPE = 4096, /* Client only flag. */ SW_MYSQL_CLIENT_TRANSACTIONS = 8192, /* Client knows about transactions. */ SW_MYSQL_CLIENT_RESERVED = 16384, /* flag for 4.1 protocol. */ SW_MYSQL_CLIENT_SECURE_CONNECTION = 32768, /* swoole custom name for RESERVED2. */ SW_MYSQL_CLIENT_RESERVED2 = 32768, /* flag for 4.1 authentication. */ SW_MYSQL_CLIENT_MULTI_STATEMENTS = (1UL << 16), /* Enable/disable multi-stmt support. */ SW_MYSQL_CLIENT_MULTI_RESULTS = (1UL << 17), /* Enable/disable multi-results. */ SW_MYSQL_CLIENT_PS_MULTI_RESULTS = (1UL << 18), /* Multi-results and OUT parameters in PS-protocol. */ SW_MYSQL_CLIENT_PLUGIN_AUTH = (1UL << 19), /* Client supports plugin authentication. */ SW_MYSQL_CLIENT_CONNECT_ATTRS = (1UL << 20), /* Client supports connection attributes. */ SW_MYSQL_CLIENT_PLUGIN_AUTH_LENENC_CLIENT_DATA = (1UL << 21), /* Enable authentication response packet to be larger than 255 bytes. */ SW_MYSQL_CLIENT_CAN_HANDLE_EXPIRED_PASSWORDS = (1UL << 22), /* Don't close the connection for a user account with expired password. */ SW_MYSQL_CLIENT_SESSION_TRACK = (1UL << 23), /* Capable of handling server state change information. */ SW_MYSQL_CLIENT_DEPRECATE_EOF = (1UL << 24), /* Client no longer needs EOF_Packet and will use OK_Packet instead. */ SW_MYSQL_CLIENT_SSL_VERIFY_SERVER_CERT = (1UL << 30), /* Verify server certificate. */ SW_MYSQL_CLIENT_REMEMBER_OPTIONS = (1UL << 31) /* Don't reset the options after an unsuccessful connect. */ }; // ref: https://dev.mysql.com/doc/internals/en/status-flags.html enum mysql_server_status_flags { SW_MYSQL_SERVER_STATUS_IN_TRANS = 0x0001, // a transaction is active SW_MYSQL_SERVER_STATUS_AUTOCOMMIT = 0x0002, //auto-commit is enabled SW_MYSQL_SERVER_MORE_RESULTS_EXISTS = 0x0008, SW_MYSQL_SERVER_STATUS_NO_GOOD_INDEX_USED = 0x0010, SW_MYSQL_SERVER_STATUS_NO_INDEX_USED = 0x0020, SW_MYSQL_SERVER_STATUS_CURSOR_EXISTS = 0x0040, // Used by Binary Protocol Resultset to signal that COM_STMT_FETCH must be used to fetch the row-data. SW_MYSQL_SERVER_STATUS_LAST_ROW_SENT = 0x0080, SW_MYSQL_SERVER_STATUS_DB_DROPPED = 0x0100, SW_MYSQL_SERVER_STATUS_NO_BACKSLASH_ESCAPES = 0x0200, SW_MYSQL_SERVER_STATUS_METADATA_CHANGED = 0x0400, SW_MYSQL_SERVER_QUERY_WAS_SLOW = 0x0800, SW_MYSQL_SERVER_PS_OUT_PARAMS = 0x1000, SW_MYSQL_SERVER_STATUS_IN_TRANS_READONLY = 0x2000, // in a read-only transaction SW_MYSQL_SERVER_SESSION_STATE_CHANGED = 0x4000 // connection state information has changed }; typedef struct { uint32_t packet_length :24; uint32_t packet_number :8; uint8_t protocol_version; char *server_version; int connection_id; char auth_plugin_data[SW_MYSQL_NONCE_LENGTH + 1]; // nonce + '\0' uint8_t l_auth_plugin_data; char filler; int capability_flags; char character_set; int16_t status_flags; char reserved[10]; char *auth_plugin_name; uint8_t l_auth_plugin_name; } mysql_handshake_request; typedef struct { char *host; char *user; char *password; char *database; zend_bool strict_type; zend_bool fetch_mode; size_t host_len; size_t user_len; size_t password_len; size_t database_len; long port; double timeout; swTimer_node *timer; int capability_flags; int max_packet_size; char character_set; int packet_length; char buf[512]; #ifdef SW_USE_OPENSSL char auth_plugin_data[SW_MYSQL_NONCE_LENGTH]; // save challenge data for RSA auth #endif uint16_t error_code; char *error_msg; uint16_t error_length; } mysql_connector; typedef struct { char *buffer; char *name; /* Name of column */ char *org_name; /* Original column name, if an alias */ char *table; /* Table of column if column was a field */ char *org_table; /* Org table name, if table was an alias */ char *db; /* Database for table */ char *catalog; /* Catalog for table */ char *def; /* Default value (set by mysql_list_fields) */ ulong_t length; /* Width of column (create length) */ ulong_t max_length; /* Max width for selected set */ uint32_t name_length; uint32_t org_name_length; uint32_t table_length; uint32_t org_table_length; uint32_t db_length; uint32_t catalog_length; uint32_t def_length; uint32_t flags; /* Div flags */ uint32_t decimals; /* Number of decimals in field */ uint32_t charsetnr; /* Character set */ enum mysql_field_types type; /* Type of field. See mysql_com.h for types */ void *extension; } mysql_field; typedef union { signed char stiny; uchar utiny; uchar mbool; short ssmall; unsigned short small; int sint; uint32_t uint; long long sbigint; unsigned long long ubigint; float mfloat; double mdouble; } mysql_row; typedef struct { uint32_t id; uint16_t field_count; uint16_t param_count; uint16_t warning_count; uint16_t unreaded_param_count; struct _mysql_client *client; zval *object; swString *buffer; /* save the mysql multi responses data */ zval *result; /* save the zval array result */ } mysql_statement; typedef struct { mysql_field *columns; ulong_t num_column; ulong_t index_column; uint32_t num_row; uint8_t response_type; uint32_t packet_length :24; uint32_t packet_number :8; int32_t error_code; uint32_t warnings; uint16_t status_code; char status_msg[6]; char *server_msg; uint16_t l_server_msg; ulong_t affected_rows; ulong_t insert_id; zval *result_array; } mysql_response_t; typedef struct _mysql_client { #ifdef SW_COROUTINE zend_bool defer; zend_bool suspending; mysql_io_status iowait; zval *result; long cid; #endif uint8_t state; uint32_t switch_check :1; /* check if server request auth switch */ uint8_t handshake; uint8_t cmd; /* help with judging to do what in callback */ swString *buffer; /* save the mysql responses data */ swClient *cli; zval *object; zval *callback; zval *onClose; int fd; uint32_t transaction :1; uint32_t connected :1; mysql_connector connector; mysql_statement *statement; swLinkedList *statement_list; swTimer_node *timer; zval _object; zval _onClose; size_t want_length; off_t check_offset; mysql_response_t response; /* single response */ // for stored procedure zval* tmp_result; } mysql_client; #define mysql_request_buffer (SwooleTG.buffer_stack) #define SW_MYSQL_NOT_NULL_FLAG 1 #define SW_MYSQL_PRI_KEY_FLAG 2 #define SW_MYSQL_UNIQUE_KEY_FLAG 4 #define SW_MYSQL_MULTIPLE_KEY_FLAG 8 #define SW_MYSQL_BLOB_FLAG 16 #define SW_MYSQL_UNSIGNED_FLAG 32 #define SW_MYSQL_ZEROFILL_FLAG 64 #define SW_MYSQL_BINARY_FLAG 128 #define SW_MYSQL_ENUM_FLAG 256 #define SW_MYSQL_AUTO_INCREMENT_FLAG 512 #define SW_MYSQL_TIMESTAMP_FLAG 1024 #define SW_MYSQL_SET_FLAG 2048 #define SW_MYSQL_NO_DEFAULT_VALUE_FLAG 4096 #define SW_MYSQL_ON_UPDATE_NOW_FLAG 8192 #define SW_MYSQL_PART_KEY_FLAG 16384 #define SW_MYSQL_GROUP_FLAG 32768 #define SW_MYSQL_NUM_FLAG 32768 #define SW_MYSQL_PACKET_OK 0x0 #define SW_MYSQL_PACKET_NULL 0xfb #define SW_MYSQL_PACKET_EOF 0xfe #define SW_MYSQL_PACKET_ERR 0xff /* int<3> payload_length + int<1> sequence_id */ #define SW_MYSQL_PACKET_HEADER_SIZE 4 #define SW_MYSQL_PACKET_EOF_MAX_SIZE 9 #define SW_MYSQL_MAX_PACKET_BODY_SIZE 0x00ffffff #define SW_MYSQL_MAX_PACKET_SIZE (SW_MYSQL_PACKET_HEADER_SIZE + SW_MYSQL_MAX_PACKET_BODY_SIZE) #define mysql_uint2korr(A) (uint16_t) (((uint16_t) ((zend_uchar) (A)[0])) +\ ((uint16_t) ((zend_uchar) (A)[1]) << 8)) #define mysql_uint3korr(A) (uint32_t) (((uint32_t) ((zend_uchar) (A)[0])) +\ (((uint32_t) ((zend_uchar) (A)[1])) << 8) +\ (((uint32_t) ((zend_uchar) (A)[2])) << 16)) #define mysql_uint4korr(A) (uint32_t) (((uint32_t) ((zend_uchar) (A)[0])) +\ (((uint32_t) ((zend_uchar) (A)[1])) << 8) +\ (((uint32_t) ((zend_uchar) (A)[2])) << 16) +\ (((uint32_t) ((zend_uchar) (A)[3])) << 24)) #define mysql_uint8korr(A) ((uint64_t)(((uint32_t) ((zend_uchar) (A)[0])) +\ (((uint32_t) ((zend_uchar) (A)[1])) << 8) +\ (((uint32_t) ((zend_uchar) (A)[2])) << 16) +\ (((uint32_t) ((zend_uchar) (A)[3])) << 24)) +\ (((uint64_t) (((uint32_t) ((zend_uchar) (A)[4])) +\ (((uint32_t) ((zend_uchar) (A)[5])) << 8) +\ (((uint32_t) ((zend_uchar) (A)[6])) << 16) +\ (((uint32_t) ((zend_uchar) (A)[7])) << 24))) << 32)) #define mysql_int1store(T,A) do { *((int8_t*) (T)) = (int8_t)(A); } while(0) #define mysql_int2store(T,A) do { uint32_t def_temp= (uint32_t) (A) ;\ *((zend_uchar*) (T)) = (zend_uchar)(def_temp); \ *((zend_uchar*) (T+1)) = (zend_uchar)((def_temp >> 8)); } while (0) #define mysql_int3store(T,A) do { /*lint -save -e734 */\ *(((char *)(T))) = (char) ((A));\ *(((char *)(T))+1) = (char) (((A) >> 8));\ *(((char *)(T))+2) = (char) (((A) >> 16)); \ /*lint -restore */} while (0) #define mysql_int4store(T,A) do { \ *(((char *)(T))) = (char) ((A));\ *(((char *)(T))+1) = (char) (((A) >> 8));\ *(((char *)(T))+2) = (char) (((A) >> 16));\ *(((char *)(T))+3) = (char) (((A) >> 24)); } while (0) #define mysql_int5store(T,A) do { \ *(((char *)(T))) = (char)((A));\ *(((char *)(T))+1) = (char)(((A) >> 8));\ *(((char *)(T))+2) = (char)(((A) >> 16));\ *(((char *)(T))+3) = (char)(((A) >> 24)); \ *(((char *)(T))+4) = (char)(((A) >> 32)); } while (0) /* Based on int5store() from Andrey Hristov */ #define mysql_int6store(T,A) do { \ *(((char *)(T))) = (char)((A));\ *(((char *)(T))+1) = (char)(((A) >> 8));\ *(((char *)(T))+2) = (char)(((A) >> 16));\ *(((char *)(T))+3) = (char)(((A) >> 24)); \ *(((char *)(T))+4) = (char)(((A) >> 32)); \ *(((char *)(T))+5) = (char)(((A) >> 40)); } while (0) #define mysql_int8store(T,A) do { uint32_t def_temp= (uint32_t) (A), def_temp2= (uint32_t) ((A) >> 32); \ mysql_int4store((T),def_temp); \ mysql_int4store((T+4),def_temp2); } while (0) #define MYSQL_RESPONSE_BUFFER (client->cmd == SW_MYSQL_COM_STMT_EXECUTE ? client->statement->buffer : client->buffer) int mysql_get_result(mysql_connector *connector, char *buf, size_t len); int mysql_get_charset(char *name); int mysql_handshake(mysql_connector *connector, char *buf, size_t len); int mysql_parse_auth_signature(swString *buffer, mysql_connector *connector); int mysql_parse_rsa(mysql_connector *connector, char *buf, size_t len); int mysql_auth_switch(mysql_connector *connector, char *buf, size_t len); int mysql_request_pack(swString *sql, swString *buffer); int mysql_prepare_pack(swString *sql, swString *buffer); #ifdef SW_MYSQL_DEBUG void mysql_client_info(mysql_client *client); void mysql_column_info(mysql_field *field); #define swMysqlPacketDump(packet, len, title) \ do { \ unsigned int of = 0; \ swDebug("+----------+------------+-------------------------------------------------------+"); \ swDebug("| P#%-6d | L%-9zu | %-10zu %42s |", (packet)[3], mysql_uint3korr(packet), len, title); \ swDebug("+----------+------------+-----------+-----------+------------+------------------+"); \ for (of = 0; of < len; of += 16) { \ char hex[16*3+1]; \ char str[16+1]; \ int i, hof = 0, sof = 0; \ for (i = of ; i < of + 16 && i < len ; i++) { \ hof += sprintf(hex+hof, "%02x ", (packet)[i] & 0xff); \ sof += sprintf(str+sof, "%c", isprint((int)(packet)[i]) ? (packet)[i] : '.'); \ } \ swDebug("| %08x | %-48s| %-16s |", of, hex, str); \ } \ swDebug("+----------+------------+-----------+-----------+------------+------------------+"); \ } while(0) #else #define swMysqlPacketDump(packet, len, title) #endif static sw_inline void mysql_pack_length(int length, char *buf) { buf[2] = length >> 16; buf[1] = length >> 8; buf[0] = length; } static sw_inline int mysql_length_coded_binary(char *m, ulong_t *r, char *nul, uint32_t len) { if (len < 1) { return -1; } switch ((uchar) m[0]) { case 251: /* fb : 1 octet */ *r = 0; *nul = 1; return 1; case 252: /* fc : 2 octets */ if (len < 3) { return -1; } *r = mysql_uint2korr(m + 1); *nul = 0; return 3; case 253: /* fd : 3 octets */ if (len < 5) { return -1; } *r = mysql_uint3korr(m + 1); *nul = 0; return 4; case 254: /* fe */ if (len < 9) { return -1; } *r = mysql_uint8korr(m + 1); *nul = 0; return 9; default: *r = (uchar) m[0]; *nul = 0; return 1; } } static sw_inline int mysql_write_lcb(char *p, long val) { if (val <= 250) { mysql_int1store(p, val); return 1; } else if (val <= 0xffff) { mysql_int2store(p, val); return 2; } else if (val <= 0xffffff) { mysql_int3store(p, val); return 3; } else { mysql_int1store(p, 254); mysql_int8store(p, val); return 9; } } static sw_inline int mysql_ensure_packet(char *buf, size_t n_buf) { if (n_buf < SW_MYSQL_PACKET_HEADER_SIZE) { return SW_ERR; } uint32_t packet_length = mysql_uint3korr(buf); // Ensure that we've received the complete packet if (n_buf < SW_MYSQL_PACKET_HEADER_SIZE + packet_length) { return SW_ERR; } return SW_OK; } END_EXTERN_C() #endif /* SWOOLE_MYSQL_H_ */