hcq/MaxScale
hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
MaxScale/server/modules/protocol/mysql_common.c
Markus Makela 3992135325 Move authentication return codes to gw_authenticator.h 
The MYSQL_* authentication return codes are now in gw_authenticator.h so
that all authenticators can use them. Also dropped the MYSQL_ prefix from
the return codes and added AUTH_INCOMPLETE for a generic
authentication-in-progress return code.
2016-09-20 11:44:17 +03:00

995 lines
27 KiB
C
Raw Blame History

/*
* Copyright (c) 2016 MariaDB Corporation Ab
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file and at www.mariadb.com/bsl.
*
* Change Date: 2019-07-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2 or later of the General
* Public License.
*/
/*
* MySQL Protocol common routines for client to gateway and gateway to backend
*
* Revision History
* Date Who Description
* 17/06/2013 Massimiliano Pinto Common MySQL protocol routines
* 02/06/2013 Massimiliano Pinto MySQL connect asynchronous phases
* 04/09/2013 Massimiliano Pinto Added dcb NULL assert in mysql_send_custom_error
* 12/09/2013 Massimiliano Pinto Added checks in gw_decode_mysql_server_handshake and
* gw_read_backend_handshake
* 10/02/2014 Massimiliano Pinto Added MySQL Authentication with user@host
* 10/09/2014 Massimiliano Pinto Added MySQL Authentication option enabling localhost
* match with any host (wildcard %)
* Backend server configuration may differ so default is 0,
* don't match and an explicit
* localhost entry should be added for the selected user
* in the backends.
* Setting to 1 allow localhost (127.0.0.1 or socket) to
* match the any host grant via
* user@%
* 29/09/2014 Massimiliano Pinto Added Mysql user@host authentication with wildcard in IPv4 hosts:
* x.y.z.%, x.y.%.%, x.%.%.%
* 03/10/2014 Massimiliano Pinto Added netmask for wildcard in IPv4 hosts.
* 24/10/2014 Massimiliano Pinto Added Mysql user@host @db authentication support
* 10/11/2014 Massimiliano Pinto Charset at connect is passed to backend during authentication
* 07/07/2015 Martin Brampton Fix problem recognising null password
* 07/02/2016 Martin Brampton Remove authentication functions to mysql_auth.c
* 31/05/2016 Martin Brampton Add mysql_create_standard_error function
*
*/
#include <gw.h>
#include <utils.h>
#include <mysql_client_server_protocol.h>
#include <maxscale/alloc.h>
#include <skygw_types.h>
#include <skygw_utils.h>
#include <log_manager.h>
#include <netinet/tcp.h>
static server_command_t* server_command_init(server_command_t* srvcmd, mysql_server_cmd_t cmd);
/**
* Creates MySQL protocol structure
*
* @param dcb * Must be non-NULL.
* @param fd
*
* @return
*
*
* @details Protocol structure does not have fd because dcb is not
* connected yet.
*
*/
MySQLProtocol* mysql_protocol_init(DCB* dcb, int fd)
{
MySQLProtocol* p;
p = (MySQLProtocol *) MXS_CALLOC(1, sizeof(MySQLProtocol));
ss_dassert(p != NULL);
if (p == NULL)
{
goto return_p;
}
p->protocol_state = MYSQL_PROTOCOL_ALLOC;
p->protocol_auth_state = MYSQL_ALLOC;
p->current_command = MYSQL_COM_UNDEFINED;
p->protocol_command.scom_cmd = MYSQL_COM_UNDEFINED;
p->protocol_command.scom_nresponse_packets = 0;
p->protocol_command.scom_nbytes_to_read = 0;
#if defined(SS_DEBUG)
p->protocol_chk_top = CHK_NUM_PROTOCOL;
p->protocol_chk_tail = CHK_NUM_PROTOCOL;
#endif
/*< Assign fd with protocol */
p->fd = fd;
p->owner_dcb = dcb;
p->protocol_state = MYSQL_PROTOCOL_ACTIVE;
CHK_PROTOCOL(p);
return_p:
return p;
}
/**
* mysql_protocol_done
*
* free protocol allocations.
*
* @param dcb owner DCB
*
*/
void mysql_protocol_done(DCB* dcb)
{
MySQLProtocol* p;
server_command_t* scmd;
server_command_t* scmd2;
p = (MySQLProtocol *)dcb->protocol;
spinlock_acquire(&p->protocol_lock);
if (p->protocol_state != MYSQL_PROTOCOL_ACTIVE)
{
goto retblock;
}
scmd = p->protocol_cmd_history;
while (scmd != NULL)
{
scmd2 = scmd->scom_next;
MXS_FREE(scmd);
scmd = scmd2;
}
p->protocol_state = MYSQL_PROTOCOL_DONE;
retblock:
spinlock_release(&p->protocol_lock);
}
/**
* Return a string representation of a MySQL protocol state.
*
* @param state The protocol state
* @return String representation of the state
*
*/
const char* gw_mysql_protocol_state2string (int state)
{
switch(state)
{
case MYSQL_ALLOC:
return "MySQL Protocl struct allocated";
case MYSQL_PENDING_CONNECT:
return "MySQL Backend socket PENDING connect";
case MYSQL_CONNECTED:
return "MySQL Backend socket CONNECTED";
case MYSQL_AUTH_SENT:
return "MySQL Authentication handshake has been sent";
case MYSQL_AUTH_RECV:
return "MySQL Received user, password, db and capabilities";
case MYSQL_AUTH_FAILED:
return "MySQL Authentication failed";
case MYSQL_IDLE:
return "MySQL authentication is succesfully done.";
case MYSQL_AUTH_SSL_REQ:
return "MYSQL_AUTH_SSL_REQ";
case MYSQL_AUTH_SSL_HANDSHAKE_DONE:
return "MYSQL_AUTH_SSL_HANDSHAKE_DONE";
case MYSQL_AUTH_SSL_HANDSHAKE_FAILED:
return "MYSQL_AUTH_SSL_HANDSHAKE_FAILED";
case MYSQL_AUTH_SSL_HANDSHAKE_ONGOING:
return "MYSQL_AUTH_SSL_HANDSHAKE_ONGOING";
default:
return "MySQL (unknown protocol state)";
}
}
GWBUF* mysql_create_com_quit(GWBUF* bufparam,
int packet_number)
{
uint8_t* data;
GWBUF* buf;
if (bufparam == NULL)
{
buf = gwbuf_alloc(COM_QUIT_PACKET_SIZE);
}
else
{
buf = bufparam;
}
if (buf == NULL)
{
return 0;
}
ss_dassert(GWBUF_LENGTH(buf) == COM_QUIT_PACKET_SIZE);
data = GWBUF_DATA(buf);
*data++ = 0x1;
*data++ = 0x0;
*data++ = 0x0;
*data++ = packet_number;
*data = 0x1;
return buf;
}
int mysql_send_com_quit(DCB* dcb,
int packet_number,
GWBUF* bufparam)
{
GWBUF *buf;
int nbytes = 0;
CHK_DCB(dcb);
ss_dassert(packet_number <= 255);
if (dcb == NULL || dcb->state == DCB_STATE_ZOMBIE)
{
return 0;
}
if (bufparam == NULL)
{
buf = mysql_create_com_quit(NULL, packet_number);
}
else
{
buf = bufparam;
}
if (buf == NULL)
{
return 0;
}
nbytes = dcb->func.write(dcb, buf);
return nbytes;
}
GWBUF* mysql_create_custom_error(int packet_number,
int affected_rows,
const char* msg)
{
uint8_t* outbuf = NULL;
uint32_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t* mysql_payload = NULL;
uint8_t field_count = 0;
uint8_t mysql_err[2];
uint8_t mysql_statemsg[6];
const char* mysql_error_msg = NULL;
const char* mysql_state = NULL;
GWBUF* errbuf = NULL;
mysql_error_msg = "An errorr occurred ...";
mysql_state = "HY000";
field_count = 0xff;
gw_mysql_set_byte2(mysql_err, /* mysql_errno */ 2003);
mysql_statemsg[0]='#';
memcpy(mysql_statemsg + 1, mysql_state, 5);
if (msg != NULL)
{
mysql_error_msg = msg;
}
mysql_payload_size =
sizeof(field_count) +
sizeof(mysql_err) +
sizeof(mysql_statemsg) +
strlen(mysql_error_msg);
/** allocate memory for packet header + payload */
errbuf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size);
ss_dassert(errbuf != NULL);
if (errbuf == NULL)
{
return 0;
}
outbuf = GWBUF_DATA(errbuf);
/** write packet header and packet number */
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
mysql_packet_header[3] = packet_number;
/** write header */
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
mysql_payload = outbuf + sizeof(mysql_packet_header);
/** write field */
memcpy(mysql_payload, &field_count, sizeof(field_count));
mysql_payload = mysql_payload + sizeof(field_count);
/** write errno */
memcpy(mysql_payload, mysql_err, sizeof(mysql_err));
mysql_payload = mysql_payload + sizeof(mysql_err);
/** write sqlstate */
memcpy(mysql_payload, mysql_statemsg, sizeof(mysql_statemsg));
mysql_payload = mysql_payload + sizeof(mysql_statemsg);
/** write error message */
memcpy(mysql_payload, mysql_error_msg, strlen(mysql_error_msg));
return errbuf;
}
/**
* @brief Create a standard MariaDB error message, emulating real server
*
* Supports the sending to a client of a standard database error, for
* circumstances where the error is generated within MaxScale but should
* appear like a backend server error. First introduced to support connection
* throttling, to send "Too many connections" error.
*
* @param packet_number Packet number for header
* @param error_number Standard error number as for MariaDB
* @param error_message Text message to be included
* @return GWBUF A buffer containing the error message, ready to send
*/
GWBUF *
mysql_create_standard_error(int packet_number,
int error_number,
const char *error_message)
{
uint8_t *outbuf = NULL;
uint32_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t mysql_error_number[2];
uint8_t *mysql_handshake_payload = NULL;
GWBUF *buf;
mysql_payload_size = 1 + sizeof(mysql_error_number) + strlen(error_message);
// allocate memory for packet header + payload
if ((buf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size)) == NULL)
{
return NULL;
}
outbuf = GWBUF_DATA(buf);
// write packet header with mysql_payload_size
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
// write packet number, now is 0
mysql_packet_header[3]= 0;
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
// current buffer pointer
mysql_handshake_payload = outbuf + sizeof(mysql_packet_header);
// write 0xff which is the error indicator
*mysql_handshake_payload = 0xff;
mysql_handshake_payload++;
// write error number
gw_mysql_set_byte2(mysql_handshake_payload, error_number);
mysql_handshake_payload += 2;
// write error message
memcpy(mysql_handshake_payload, error_message, strlen(error_message));
return buf;
}
/**
* @brief Send a standard MariaDB error message, emulating real server
*
* Supports the sending to a client of a standard database error, for
* circumstances where the error is generated within MaxScale but should
* appear like a backend server error. First introduced to support connection
* throttling, to send "Too many connections" error.
*
* @param dcb The client DCB to which error is to be sent
* @param packet_number Packet number for header
* @param error_number Standard error number as for MariaDB
* @param error_message Text message to be included
* @return 0 on failure, 1 on success
*/
int
mysql_send_standard_error(DCB *dcb,
int packet_number,
int error_number,
const char *error_message)
{
GWBUF *buf;
buf = mysql_create_standard_error(packet_number, error_number, error_message);
return buf ? dcb->func.write(dcb, buf) : 0;
}
/**
* mysql_send_custom_error
*
* Send a MySQL protocol Generic ERR message, to the dcb
* Note the errno and state are still fixed now
*
* @param dcb Owner_Dcb Control Block for the connection to which the OK is sent
* @param packet_number
* @param in_affected_rows
* @param mysql_message
* @return 1 Non-zero if data was sent
*
*/
int mysql_send_custom_error(DCB *dcb,
int packet_number,
int in_affected_rows,
const char *mysql_message)
{
GWBUF* buf;
buf = mysql_create_custom_error(packet_number, in_affected_rows, mysql_message);
return dcb->func.write(dcb, buf);
}
/**
* mysql_send_auth_error
*
* Send a MySQL protocol ERR message, for gateway authentication error to the dcb
*
* @param dcb descriptor Control Block for the connection to which the OK is sent
* @param packet_number
* @param in_affected_rows
* @param mysql_message
* @return packet length
*
*/
int mysql_send_auth_error(DCB *dcb,
int packet_number,
int in_affected_rows,
const char *mysql_message)
{
uint8_t *outbuf = NULL;
uint32_t mysql_payload_size = 0;
uint8_t mysql_packet_header[4];
uint8_t *mysql_payload = NULL;
uint8_t field_count = 0;
uint8_t mysql_err[2];
uint8_t mysql_statemsg[6];
const char *mysql_error_msg = NULL;
const char *mysql_state = NULL;
GWBUF *buf;
if (dcb->state != DCB_STATE_POLLING)
{
MXS_DEBUG("%lu [mysql_send_auth_error] dcb %p is in a state %s, "
"and it is not in epoll set anymore. Skip error sending.",
pthread_self(),
dcb,
STRDCBSTATE(dcb->state));
return 0;
}
mysql_error_msg = "Access denied!";
mysql_state = "28000";
field_count = 0xff;
gw_mysql_set_byte2(mysql_err, /*mysql_errno */ 1045);
mysql_statemsg[0]='#';
memcpy(mysql_statemsg + 1, mysql_state, 5);
if (mysql_message != NULL)
{
mysql_error_msg = mysql_message;
}
mysql_payload_size =
sizeof(field_count) + sizeof(mysql_err) + sizeof(mysql_statemsg) + strlen(mysql_error_msg);
// allocate memory for packet header + payload
if ((buf = gwbuf_alloc(sizeof(mysql_packet_header) + mysql_payload_size)) == NULL)
{
return 0;
}
outbuf = GWBUF_DATA(buf);
// write packet header with packet number
gw_mysql_set_byte3(mysql_packet_header, mysql_payload_size);
mysql_packet_header[3] = packet_number;
// write header
memcpy(outbuf, mysql_packet_header, sizeof(mysql_packet_header));
mysql_payload = outbuf + sizeof(mysql_packet_header);
// write field
memcpy(mysql_payload, &field_count, sizeof(field_count));
mysql_payload = mysql_payload + sizeof(field_count);
// write errno
memcpy(mysql_payload, mysql_err, sizeof(mysql_err));
mysql_payload = mysql_payload + sizeof(mysql_err);
// write sqlstate
memcpy(mysql_payload, mysql_statemsg, sizeof(mysql_statemsg));
mysql_payload = mysql_payload + sizeof(mysql_statemsg);
// write err messg
memcpy(mysql_payload, mysql_error_msg, strlen(mysql_error_msg));
// writing data in the Client buffer queue
dcb->func.write(dcb, buf);
return sizeof(mysql_packet_header) + mysql_payload_size;
}
/**
* Buffer contains at least one of the following:
* complete [complete] [partial] mysql packet
*
* @param p_readbuf Address of read buffer pointer
*
* @return pointer to gwbuf containing a complete packet or
* NULL if no complete packet was found.
*/
GWBUF* gw_MySQL_get_next_packet(GWBUF** p_readbuf)
{
GWBUF* packetbuf;
GWBUF* readbuf;
size_t buflen;
size_t packetlen;
size_t totalbuflen;
uint8_t* data;
size_t nbytes_copied = 0;
uint8_t* target;
readbuf = *p_readbuf;
if (readbuf == NULL)
{
packetbuf = NULL;
goto return_packetbuf;
}
CHK_GWBUF(readbuf);
if (GWBUF_EMPTY(readbuf))
{
packetbuf = NULL;
goto return_packetbuf;
}
totalbuflen = gwbuf_length(readbuf);
data = (uint8_t *)GWBUF_DATA((readbuf));
packetlen = MYSQL_GET_PACKET_LEN(data) + 4;
/** packet is incomplete */
if (packetlen > totalbuflen)
{
packetbuf = NULL;
goto return_packetbuf;
}
packetbuf = gwbuf_alloc(packetlen);
target = GWBUF_DATA(packetbuf);
packetbuf->gwbuf_type = readbuf->gwbuf_type; /*< Copy the type too */
/**
* Copy first MySQL packet to packetbuf and leave posible other
* packets to read buffer.
*/
while (nbytes_copied < packetlen && totalbuflen > 0)
{
uint8_t* src = GWBUF_DATA((*p_readbuf));
size_t bytestocopy;
buflen = GWBUF_LENGTH((*p_readbuf));
bytestocopy = buflen < (packetlen - nbytes_copied) ? buflen : packetlen - nbytes_copied;
memcpy(target + nbytes_copied, src, bytestocopy);
*p_readbuf = gwbuf_consume((*p_readbuf), bytestocopy);
totalbuflen = gwbuf_length((*p_readbuf));
nbytes_copied += bytestocopy;
}
ss_dassert(buflen == 0 || nbytes_copied == packetlen);
return_packetbuf:
return packetbuf;
}
/**
* Move <npackets> from buffer pointed to by <*p_readbuf>.
* Appears to be unused 11 May 2016 (Martin)
*/
GWBUF* gw_MySQL_get_packets(GWBUF** p_srcbuf,
int* npackets)
{
GWBUF* packetbuf;
GWBUF* targetbuf = NULL;
while (*npackets > 0 && (packetbuf = gw_MySQL_get_next_packet(p_srcbuf)) != NULL)
{
targetbuf = gwbuf_append(targetbuf, packetbuf);
*npackets -= 1;
}
ss_dassert(*npackets < 128);
ss_dassert(*npackets >= 0);
return targetbuf;
}
static server_command_t* server_command_init(server_command_t* srvcmd,
mysql_server_cmd_t cmd)
{
server_command_t* c;
if (srvcmd != NULL)
{
c = srvcmd;
}
else
{
c = (server_command_t *)MXS_MALLOC(sizeof(server_command_t));
}
if (c != NULL)
{
c->scom_cmd = cmd;
c->scom_nresponse_packets = -1;
c->scom_nbytes_to_read = 0;
c->scom_next = NULL;
}
return c;
}
static server_command_t* server_command_copy(server_command_t* srvcmd)
{
server_command_t* c = (server_command_t *)MXS_MALLOC(sizeof(server_command_t));
if (c)
{
*c = *srvcmd;
}
return c;
}
#define MAX_CMD_HISTORY 10
void protocol_archive_srv_command(MySQLProtocol* p)
{
server_command_t* s1;
server_command_t* h1;
int len = 0;
CHK_PROTOCOL(p);
spinlock_acquire(&p->protocol_lock);
if (p->protocol_state != MYSQL_PROTOCOL_ACTIVE)
{
goto retblock;
}
s1 = &p->protocol_command;
#if defined(EXTRA_SS_DEBUG)
MXS_INFO("Move command %s from fd %d to command history.",
STRPACKETTYPE(s1->scom_cmd),
p->owner_dcb->fd);
#endif
/** Copy to history list */
if ((h1 = p->protocol_cmd_history) == NULL)
{
p->protocol_cmd_history = server_command_copy(s1);
}
else /*< scan and count history commands */
{
len = 1;
while (h1->scom_next != NULL)
{
h1 = h1->scom_next;
len += 1;
}
h1->scom_next = server_command_copy(s1);
}
/** Keep history limits, remove oldest */
if (len > MAX_CMD_HISTORY)
{
server_command_t* c = p->protocol_cmd_history;
p->protocol_cmd_history = p->protocol_cmd_history->scom_next;
MXS_FREE(c);
}
/** Remove from command list */
if (s1->scom_next == NULL)
{
p->protocol_command.scom_cmd = MYSQL_COM_UNDEFINED;
}
else
{
p->protocol_command = *(s1->scom_next);
MXS_FREE(s1->scom_next);
}
retblock:
spinlock_release(&p->protocol_lock);
CHK_PROTOCOL(p);
}
/**
* If router expects to get separate, complete statements, add MySQL command
* to MySQLProtocol structure. It is removed when response has arrived.
*/
void protocol_add_srv_command(MySQLProtocol* p,
mysql_server_cmd_t cmd)
{
#if defined(EXTRA_SS_DEBUG)
server_command_t* c;
#endif
spinlock_acquire(&p->protocol_lock);
if (p->protocol_state != MYSQL_PROTOCOL_ACTIVE)
{
goto retblock;
}
/** this is the only server command in protocol */
if (p->protocol_command.scom_cmd == MYSQL_COM_UNDEFINED)
{
/** write into structure */
server_command_init(&p->protocol_command, cmd);
}
else
{
/** add to the end of list */
p->protocol_command.scom_next = server_command_init(NULL, cmd);
}
#if defined(EXTRA_SS_DEBUG)
MXS_INFO("Added command %s to fd %d.",
STRPACKETTYPE(cmd),
p->owner_dcb->fd);
c = &p->protocol_command;
while (c != NULL && c->scom_cmd != MYSQL_COM_UNDEFINED)
{
MXS_INFO("fd %d : %d %s",
p->owner_dcb->fd,
c->scom_cmd,
STRPACKETTYPE(c->scom_cmd));
c = c->scom_next;
}
#endif
retblock:
spinlock_release(&p->protocol_lock);
}
/**
* If router processes separate statements, every stmt has corresponding MySQL
* command stored in MySQLProtocol structure.
*
* Remove current (=oldest) command.
*/
void protocol_remove_srv_command(MySQLProtocol* p)
{
server_command_t* s;
spinlock_acquire(&p->protocol_lock);
s = &p->protocol_command;
#if defined(EXTRA_SS_DEBUG)
MXS_INFO("Removed command %s from fd %d.",
STRPACKETTYPE(s->scom_cmd),
p->owner_dcb->fd);
#endif
if (s->scom_next == NULL)
{
p->protocol_command.scom_cmd = MYSQL_COM_UNDEFINED;
}
else
{
p->protocol_command = *(s->scom_next);
MXS_FREE(s->scom_next);
}
spinlock_release(&p->protocol_lock);
}
mysql_server_cmd_t protocol_get_srv_command(MySQLProtocol* p,
bool removep)
{
mysql_server_cmd_t cmd;
cmd = p->protocol_command.scom_cmd;
if (removep)
{
protocol_remove_srv_command(p);
}
MXS_DEBUG("%lu [protocol_get_srv_command] Read command %s for fd %d.",
pthread_self(),
STRPACKETTYPE(cmd),
p->owner_dcb->fd);
return cmd;
}
/**
* Examine command type and the readbuf. Conclude response
* packet count from the command type or from the first packet
* content.
* Fails if read buffer doesn't include enough data to read the
* packet length.
*/
void init_response_status(GWBUF* buf,
mysql_server_cmd_t cmd,
int* npackets,
ssize_t* nbytes_left)
{
uint8_t readbuf[3];
int nparam = 0;
int nattr = 0;
uint8_t* data;
ss_dassert(gwbuf_length(buf) >= 3);
/** Read command byte */
gwbuf_copy_data(buf, 4, 1, readbuf);
if (readbuf[0] == 0xff) /*< error */
{
*npackets = 1;
}
else
{
switch (cmd)
{
case MYSQL_COM_STMT_PREPARE:
gwbuf_copy_data(buf, 9, 2, readbuf);
nparam = gw_mysql_get_byte2(readbuf);
gwbuf_copy_data(buf, 11, 2, readbuf);
nattr = gw_mysql_get_byte2(readbuf);
*npackets = 1 + nparam + MIN(1, nparam) + nattr + MIN(nattr, 1);
break;
case MYSQL_COM_QUIT:
case MYSQL_COM_STMT_SEND_LONG_DATA:
case MYSQL_COM_STMT_CLOSE:
*npackets = 0; /*< these don't reply anything */
break;
default:
/**
* assume that other session commands respond
* OK or ERR
*/
*npackets = 1;
break;
}
}
gwbuf_copy_data(buf, 0, 3, readbuf);
*nbytes_left = gw_mysql_get_byte3(readbuf) + MYSQL_HEADER_LEN;
/**
* There is at least one complete packet in the buffer so buffer is bigger
* than packet
*/
ss_dassert(*nbytes_left > 0);
ss_dassert(*npackets > 0);
}
/**
* Read how many packets are left from current response and how many bytes there
* is still to be read from the current packet.
*/
bool protocol_get_response_status(MySQLProtocol* p,
int* npackets,
ssize_t* nbytes)
{
bool succp;
CHK_PROTOCOL(p);
spinlock_acquire(&p->protocol_lock);
*npackets = p->protocol_command.scom_nresponse_packets;
*nbytes = (ssize_t)p->protocol_command.scom_nbytes_to_read;
spinlock_release(&p->protocol_lock);
if (*npackets < 0 && *nbytes == 0)
{
succp = false;
}
else
{
succp = true;
}
return succp;
}
void protocol_set_response_status(MySQLProtocol* p,
int npackets_left,
ssize_t nbytes)
{
CHK_PROTOCOL(p);
spinlock_acquire(&p->protocol_lock);
p->protocol_command.scom_nbytes_to_read = nbytes;
ss_dassert(p->protocol_command.scom_nbytes_to_read >= 0);
p->protocol_command.scom_nresponse_packets = npackets_left;
spinlock_release(&p->protocol_lock);
}
char* create_auth_failed_msg(GWBUF*readbuf,
char* hostaddr,
uint8_t* sha1)
{
char* errstr;
char* uname=(char *)GWBUF_DATA(readbuf) + 5;
const char* ferrstr = "Access denied for user '%s'@'%s' (using password: %s)";
/** -4 comes from 2X'%s' minus terminating char */
errstr = (char *)MXS_MALLOC(strlen(uname) + strlen(ferrstr) + strlen(hostaddr) + strlen("YES") - 6 + 1);
if (errstr != NULL)
{
sprintf(errstr, ferrstr, uname, hostaddr, (*sha1 == '\0' ? "NO" : "YES"));
}
return errstr;
}
/**
* Create a message error string to send via MySQL ERR packet.
*
* @param username the MySQL user
* @param hostaddr the client IP
* @param sha1 authentication scramble data
* @param db the MySQL db to connect to
*
* @return Pointer to the allocated string or NULL on failure
*/
char *create_auth_fail_str(char *username,
char *hostaddr,
char *sha1,
char *db,
int errcode)
{
char* errstr;
const char* ferrstr;
int db_len;
if (db != NULL)
{
db_len = strlen(db);
}
else
{
db_len = 0;
}
if (db_len > 0)
{
ferrstr = "Access denied for user '%s'@'%s' (using password: %s) to database '%s'";
}
else if (errcode == MXS_AUTH_FAILED_SSL)
{
ferrstr = "Access without SSL denied";
}
else
{
ferrstr = "Access denied for user '%s'@'%s' (using password: %s)";
}
errstr = (char *)MXS_MALLOC(strlen(username) + strlen(ferrstr) +
strlen(hostaddr) + strlen("YES") - 6 +
db_len + ((db_len > 0) ? (strlen(" to database ") + 2) : 0) + 1);
if (errstr == NULL)
{
goto retblock;
}
if (db_len > 0)
{
sprintf(errstr, ferrstr, username, hostaddr, (*sha1 == '\0' ? "NO" : "YES"), db);
}
else if (errcode == MXS_AUTH_FAILED_SSL)
{
sprintf(errstr, "%s", ferrstr);
}
else
{
sprintf(errstr, ferrstr, username, hostaddr, (*sha1 == '\0' ? "NO" : "YES"));
}
retblock:
return errstr;
}
Reference in New Issue View Git Blame Copy Permalink