~drizzle-trunk/drizzle/development : contents of libdrizzle-2.0/command.cc at revision 2470

~drizzle-trunk/drizzle/development : (revision 2470)

/*
 * Drizzle Client & Protocol Library
 *
 * Copyright (C) 2008 Eric Day (eday@oddments.org)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *
 *     * The names of its contributors may not be used to endorse or
 * promote products derived from this software without specific prior
 * written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */


/**
 * @file
 * @brief Command definitions
 */

#include <libdrizzle-2.0/common.h>

/*
 * Private variables.
 */

static drizzle_command_drizzle_t _command_drizzle_map[]=
{
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_QUIT,
 DRIZZLE_COMMAND_DRIZZLE_INIT_DB,
 DRIZZLE_COMMAND_DRIZZLE_QUERY,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_SHUTDOWN,
 DRIZZLE_COMMAND_DRIZZLE_END, // STATISTICS
 DRIZZLE_COMMAND_DRIZZLE_END, // PROCESS_INFO
 DRIZZLE_COMMAND_DRIZZLE_END, // CONNECT
 DRIZZLE_COMMAND_DRIZZLE_KILL,// PROCESS_KILL
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_PING,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END,
 DRIZZLE_COMMAND_DRIZZLE_END
};

/*
 * State Definitions
 */

drizzle_return_t drizzle_state_command_read(drizzle_con_st *con)
{
  drizzle_log_debug(con->drizzle, "drizzle_state_command_read");

  if (con->buffer_size == 0)
  {
    drizzle_state_push(con, drizzle_state_read);
    return DRIZZLE_RETURN_OK;
  }

  if (con->command_total == 0)
  {
    con->command= (drizzle_command_t)(con->buffer_ptr[0]);
    con->buffer_ptr++;
    con->buffer_size--;

    con->command_total= (con->packet_size - 1);
  }

  if (con->buffer_size < (con->command_total - con->command_offset))
  {
    con->command_size= con->buffer_size;
    con->command_offset+= con->command_size;
  }
  else
  {
    con->command_size= (con->command_total - con->command_offset);
    con->command_offset= con->command_total;
  }

  con->command_data= con->buffer_ptr;
  con->buffer_ptr+= con->command_size;
  con->buffer_size-= con->command_size;

  if (con->command_offset == con->command_total)
  {
    drizzle_state_pop(con);
  }
  else
  {
    return DRIZZLE_RETURN_PAUSE;
  }

  return DRIZZLE_RETURN_OK;
}

drizzle_return_t drizzle_state_command_write(drizzle_con_st *con)
{
  uint8_t *start;
  uint8_t *ptr;
  size_t free_size;
  drizzle_return_t ret;

  drizzle_log_debug(con->drizzle, "drizzle_state_command_write");

  if (con->command_data == NULL && con->command_total != 0 &&
      con->command != DRIZZLE_COMMAND_CHANGE_USER)
  {
    return DRIZZLE_RETURN_PAUSE;
  }

  if (con->buffer_size == 0)
  {
    con->buffer_ptr= con->buffer;
    start= con->buffer;
  }
  else
    start= con->buffer_ptr + con->buffer_size;

  if (con->command_offset == 0)
  {
    /* Make sure we can fit the largest non-streaming packet, currently a
       DRIZZLE_COMMAND_CHANGE_USER command. */

    con->packet_size= 1  /* Command */
                    + strlen(con->user) + 1
                    + 1  /* Scramble size */
                    + DRIZZLE_MAX_SCRAMBLE_SIZE
                    + strlen(con->schema) +1;

    /* Flush buffer if there is not enough room. */
    free_size= (size_t)DRIZZLE_MAX_BUFFER_SIZE - (size_t)(start - con->buffer);
    if (free_size < con->packet_size)
    {
      drizzle_state_push(con, drizzle_state_write);
      return DRIZZLE_RETURN_OK;
    }

    /* Store packet size at the end since it may change. */
    con->packet_number= 1;
    ptr= start;
    ptr[3]= 0;
    if (con->options & DRIZZLE_CON_MYSQL)
    {
      ptr[4]= uint8_t(con->command);
    }
    else
    {
      ptr[4]= uint8_t(_command_drizzle_map[con->command]);
    }
    ptr+= 5;

    if (con->command == DRIZZLE_COMMAND_CHANGE_USER)
    {
      ptr= drizzle_pack_auth(con, ptr, &ret);
      if (ret != DRIZZLE_RETURN_OK)
        return ret;

      con->buffer_size+= (4 + con->packet_size);
    }
    else if (con->command_total == 0)
    {
      con->packet_size= 1;
      con->buffer_size+= 5;
    }
    else
    {
      con->packet_size= 1 + con->command_total;
      free_size-= 5;

      /* Copy as much of the data in as we can into the write buffer. */
      if (con->command_size <= free_size)
      {
        memcpy(ptr, con->command_data, con->command_size);
        con->command_offset= con->command_size;
        con->command_data= NULL;
        con->buffer_size+= 5 + con->command_size;
      }
      else
      {
        memcpy(ptr, con->command_data, free_size);
        con->command_offset= free_size;
        con->command_data+= free_size;
        con->command_size-= free_size;
        con->buffer_size+= 5 + free_size;
      }
    }

    /* Store packet size now. */
    drizzle_set_byte3(start, con->packet_size);
  }
  else
  {
    /* Write directly from the caller buffer for the rest. */
    con->buffer_ptr= con->command_data;
    con->buffer_size= con->command_size;
    con->command_offset+= con->command_size;
    con->command_data= NULL;
  }

  if (con->command_offset == con->command_total)
  {
    drizzle_state_pop(con);

    if (!(con->options & (DRIZZLE_CON_RAW_PACKET |
                          DRIZZLE_CON_NO_RESULT_READ)) &&
        con->command != DRIZZLE_COMMAND_FIELD_LIST)
    {
      drizzle_state_push(con, drizzle_state_result_read);
      drizzle_state_push(con, drizzle_state_packet_read);
    }
  }

  drizzle_state_push(con, drizzle_state_write);

  return DRIZZLE_RETURN_OK;
}

2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	1	/*
	2	* Drizzle Client & Protocol Library
	3	*
	4	* Copyright (C) 2008 Eric Day (eday@oddments.org)
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions are
	9	* met:
	10	*
	11	* * Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	*
	14	* * Redistributions in binary form must reproduce the above
	15	* copyright notice, this list of conditions and the following disclaimer
	16	* in the documentation and/or other materials provided with the
	17	* distribution.
	18	*
	19	* * The names of its contributors may not be used to endorse or
	20	* promote products derived from this software without specific prior
	21	* written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	24	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	25	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	26	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	27	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	28	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	29	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	30	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	31	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	32	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	33	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	34	*
	35	*/
	36
	37
	38	/**
	39	* @file
	40	* @brief Command definitions
	41	*/
	42
2449.1.2 by Brian Aker Additional fixes for libdrizzle.	43	#include <libdrizzle-2.0/common.h>
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	44
	45	/*
	46	* Private variables.
	47	*/
	48
	49	static drizzle_command_drizzle_t _command_drizzle_map[]=
	50	{
	51	DRIZZLE_COMMAND_DRIZZLE_END,
	52	DRIZZLE_COMMAND_DRIZZLE_QUIT,
	53	DRIZZLE_COMMAND_DRIZZLE_INIT_DB,
	54	DRIZZLE_COMMAND_DRIZZLE_QUERY,
	55	DRIZZLE_COMMAND_DRIZZLE_END,
	56	DRIZZLE_COMMAND_DRIZZLE_END,
	57	DRIZZLE_COMMAND_DRIZZLE_END,
	58	DRIZZLE_COMMAND_DRIZZLE_END,
	59	DRIZZLE_COMMAND_DRIZZLE_SHUTDOWN,
	60	DRIZZLE_COMMAND_DRIZZLE_END, // STATISTICS
	61	DRIZZLE_COMMAND_DRIZZLE_END, // PROCESS_INFO
	62	DRIZZLE_COMMAND_DRIZZLE_END, // CONNECT
	63	DRIZZLE_COMMAND_DRIZZLE_KILL,// PROCESS_KILL
	64	DRIZZLE_COMMAND_DRIZZLE_END,
	65	DRIZZLE_COMMAND_DRIZZLE_PING,
	66	DRIZZLE_COMMAND_DRIZZLE_END,
	67	DRIZZLE_COMMAND_DRIZZLE_END,
	68	DRIZZLE_COMMAND_DRIZZLE_END,
	69	DRIZZLE_COMMAND_DRIZZLE_END,
	70	DRIZZLE_COMMAND_DRIZZLE_END,
	71	DRIZZLE_COMMAND_DRIZZLE_END,
	72	DRIZZLE_COMMAND_DRIZZLE_END,
	73	DRIZZLE_COMMAND_DRIZZLE_END,
	74	DRIZZLE_COMMAND_DRIZZLE_END,
	75	DRIZZLE_COMMAND_DRIZZLE_END,
	76	DRIZZLE_COMMAND_DRIZZLE_END,
	77	DRIZZLE_COMMAND_DRIZZLE_END,
	78	DRIZZLE_COMMAND_DRIZZLE_END,
	79	DRIZZLE_COMMAND_DRIZZLE_END,
	80	DRIZZLE_COMMAND_DRIZZLE_END,
	81	DRIZZLE_COMMAND_DRIZZLE_END
	82	};
	83
	84	/*
	85	* State Definitions
	86	*/
	87
	88	drizzle_return_t drizzle_state_command_read(drizzle_con_st *con)
	89	{
	90	drizzle_log_debug(con->drizzle, "drizzle_state_command_read");
	91
	92	if (con->buffer_size == 0)
	93	{
	94	drizzle_state_push(con, drizzle_state_read);
	95	return DRIZZLE_RETURN_OK;
	96	}
	97
	98	if (con->command_total == 0)
	99	{
	100	con->command= (drizzle_command_t)(con->buffer_ptr[0]);
	101	con->buffer_ptr++;
	102	con->buffer_size--;
	103
	104	con->command_total= (con->packet_size - 1);
	105	}
	106
	107	if (con->buffer_size < (con->command_total - con->command_offset))
108	{
109	con->command_size= con->buffer_size;
110	con->command_offset+= con->command_size;
111	}
112	else
113	{
114	con->command_size= (con->command_total - con->command_offset);
115	con->command_offset= con->command_total;
116	}
117
118	con->command_data= con->buffer_ptr;
119	con->buffer_ptr+= con->command_size;
120	con->buffer_size-= con->command_size;
121
122	if (con->command_offset == con->command_total)
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	123	{
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	124	drizzle_state_pop(con);
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	125	}
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	126	else
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	127	{
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	128	return DRIZZLE_RETURN_PAUSE;
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	129	}
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	130
	131	return DRIZZLE_RETURN_OK;
	132	}
	133
	134	drizzle_return_t drizzle_state_command_write(drizzle_con_st *con)
	135	{
	136	uint8_t *start;
	137	uint8_t *ptr;
	138	size_t free_size;
	139	drizzle_return_t ret;
	140
	141	drizzle_log_debug(con->drizzle, "drizzle_state_command_write");
	142
	143	if (con->command_data == NULL && con->command_total != 0 &&
	144	con->command != DRIZZLE_COMMAND_CHANGE_USER)
	145	{
	146	return DRIZZLE_RETURN_PAUSE;
	147	}
	148
	149	if (con->buffer_size == 0)
	150	{
	151	con->buffer_ptr= con->buffer;
	152	start= con->buffer;
	153	}
	154	else
	155	start= con->buffer_ptr + con->buffer_size;
	156
	157	if (con->command_offset == 0)
	158	{
	159	/* Make sure we can fit the largest non-streaming packet, currently a
	160	DRIZZLE_COMMAND_CHANGE_USER command. */
	161
	162	con->packet_size= 1 /* Command */
	163	+ strlen(con->user) + 1
	164	+ 1 /* Scramble size */
	165	+ DRIZZLE_MAX_SCRAMBLE_SIZE
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	166	+ strlen(con->schema) +1;
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	167
	168	/* Flush buffer if there is not enough room. */
	169	free_size= (size_t)DRIZZLE_MAX_BUFFER_SIZE - (size_t)(start - con->buffer);
	170	if (free_size < con->packet_size)
	171	{
	172	drizzle_state_push(con, drizzle_state_write);
	173	return DRIZZLE_RETURN_OK;
	174	}
	175
	176	/* Store packet size at the end since it may change. */
	177	con->packet_number= 1;
	178	ptr= start;
	179	ptr[3]= 0;
	180	if (con->options & DRIZZLE_CON_MYSQL)
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	181	{
	182	ptr[4]= uint8_t(con->command);
	183	}
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	184	else
2461.1.1 by Brian Aker Fix safety issues around calling API with no check for NULL	185	{
	186	ptr[4]= uint8_t(_command_drizzle_map[con->command]);
	187	}
2244.1.1 by Monty Taylor Split libdrizzle into 1.0 and 2.0. Applied the C++ changes to 2.0 branch.	188	ptr+= 5;
	189
	190	if (con->command == DRIZZLE_COMMAND_CHANGE_USER)
	191	{
	192	ptr= drizzle_pack_auth(con, ptr, &ret);
	193	if (ret != DRIZZLE_RETURN_OK)
	194	return ret;
	195
	196	con->buffer_size+= (4 + con->packet_size);
	197	}
	198	else if (con->command_total == 0)
	199	{
	200	con->packet_size= 1;
	201	con->buffer_size+= 5;
	202	}
	203	else
	204	{
	205	con->packet_size= 1 + con->command_total;
	206	free_size-= 5;
	207
	208	/* Copy as much of the data in as we can into the write buffer. */
	209	if (con->command_size <= free_size)
	210	{
	211	memcpy(ptr, con->command_data, con->command_size);
	212	con->command_offset= con->command_size;
	213	con->command_data= NULL;
	214	con->buffer_size+= 5 + con->command_size;
	215	}
	216	else
	217	{
	218	memcpy(ptr, con->command_data, free_size);
	219	con->command_offset= free_size;
	220	con->command_data+= free_size;
	221	con->command_size-= free_size;
	222	con->buffer_size+= 5 + free_size;
	223	}
	224	}
	225
	226	/* Store packet size now. */
	227	drizzle_set_byte3(start, con->packet_size);
	228	}
	229	else
	230	{
	231	/* Write directly from the caller buffer for the rest. */
	232	con->buffer_ptr= con->command_data;
	233	con->buffer_size= con->command_size;
	234	con->command_offset+= con->command_size;
	235	con->command_data= NULL;
	236	}
	237
	238	if (con->command_offset == con->command_total)
	239	{
	240	drizzle_state_pop(con);
	241
	242	if (!(con->options & (DRIZZLE_CON_RAW_PACKET \|
	243	DRIZZLE_CON_NO_RESULT_READ)) &&
	244	con->command != DRIZZLE_COMMAND_FIELD_LIST)
	245	{
	246	drizzle_state_push(con, drizzle_state_result_read);
	247	drizzle_state_push(con, drizzle_state_packet_read);
	248	}
	249	}
	250
	251	drizzle_state_push(con, drizzle_state_write);
252
253	return DRIZZLE_RETURN_OK;
254	}