~drizzle-trunk/drizzle/development : contents of libdrizzle-2.0/libdrizzle/command.cc at revision 2385.2.1

~drizzle-trunk/drizzle/development : (revision 2385.2.1)

/*
 * 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 "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->db) + 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
	43	#include "common.h"
	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)
123	drizzle_state_pop(con);
124	else
125	return DRIZZLE_RETURN_PAUSE;
126
127	return DRIZZLE_RETURN_OK;
128	}
129
130	drizzle_return_t drizzle_state_command_write(drizzle_con_st *con)
131	{
132	uint8_t *start;
133	uint8_t *ptr;
134	size_t free_size;
135	drizzle_return_t ret;
136
137	drizzle_log_debug(con->drizzle, "drizzle_state_command_write");
138
139	if (con->command_data == NULL && con->command_total != 0 &&
140	con->command != DRIZZLE_COMMAND_CHANGE_USER)
141	{
142	return DRIZZLE_RETURN_PAUSE;
143	}
144
145	if (con->buffer_size == 0)
146	{
147	con->buffer_ptr= con->buffer;
148	start= con->buffer;
149	}
150	else
151	start= con->buffer_ptr + con->buffer_size;
152
153	if (con->command_offset == 0)
154	{
155	/* Make sure we can fit the largest non-streaming packet, currently a
156	DRIZZLE_COMMAND_CHANGE_USER command. */
157
158	con->packet_size= 1 /* Command */
159	+ strlen(con->user) + 1
160	+ 1 /* Scramble size */
161	+ DRIZZLE_MAX_SCRAMBLE_SIZE
162	+ strlen(con->db) + 1;
163
164	/* Flush buffer if there is not enough room. */
165	free_size= (size_t)DRIZZLE_MAX_BUFFER_SIZE - (size_t)(start - con->buffer);
166	if (free_size < con->packet_size)
167	{
168	drizzle_state_push(con, drizzle_state_write);
169	return DRIZZLE_RETURN_OK;
170	}
171
172	/* Store packet size at the end since it may change. */
173	con->packet_number= 1;
174	ptr= start;
175	ptr[3]= 0;
176	if (con->options & DRIZZLE_CON_MYSQL)
177	ptr[4]= (uint8_t)(con->command);
178	else
179	ptr[4]= (uint8_t)(_command_drizzle_map[con->command]);
180	ptr+= 5;
181
182	if (con->command == DRIZZLE_COMMAND_CHANGE_USER)
183	{
184	ptr= drizzle_pack_auth(con, ptr, &ret);
185	if (ret != DRIZZLE_RETURN_OK)
186	return ret;
187
188	con->buffer_size+= (4 + con->packet_size);
189	}
190	else if (con->command_total == 0)
191	{
192	con->packet_size= 1;
193	con->buffer_size+= 5;
194	}
195	else
196	{
197	con->packet_size= 1 + con->command_total;
198	free_size-= 5;
199
200	/* Copy as much of the data in as we can into the write buffer. */
201	if (con->command_size <= free_size)
202	{
203	memcpy(ptr, con->command_data, con->command_size);
204	con->command_offset= con->command_size;
205	con->command_data= NULL;
206	con->buffer_size+= 5 + con->command_size;
207	}
208	else
209	{
210	memcpy(ptr, con->command_data, free_size);
211	con->command_offset= free_size;
212	con->command_data+= free_size;
213	con->command_size-= free_size;
214	con->buffer_size+= 5 + free_size;
215	}
216	}
217
218	/* Store packet size now. */
219	drizzle_set_byte3(start, con->packet_size);
220	}
221	else
222	{
223	/* Write directly from the caller buffer for the rest. */
224	con->buffer_ptr= con->command_data;
225	con->buffer_size= con->command_size;
226	con->command_offset+= con->command_size;
227	con->command_data= NULL;
228	}
229
230	if (con->command_offset == con->command_total)
231	{
232	drizzle_state_pop(con);
233
234	if (!(con->options & (DRIZZLE_CON_RAW_PACKET \|
235	DRIZZLE_CON_NO_RESULT_READ)) &&
236	con->command != DRIZZLE_COMMAND_FIELD_LIST)
237	{
238	drizzle_state_push(con, drizzle_state_result_read);
239	drizzle_state_push(con, drizzle_state_packet_read);
240	}
241	}
242
243	drizzle_state_push(con, drizzle_state_write);
244
245	return DRIZZLE_RETURN_OK;
246	}