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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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HFTODO this must be hidden if we don't want client capabilities in
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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems, Inc.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <drizzled/global.h>
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#include <drizzled/error.h>
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#include <mysys/my_sys.h>
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#include <vio/violite.h>
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#include <drizzled/session.h>
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#include <signal.h>
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#include <sys/socket.h>
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#include <sys/poll.h>
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The following handles the differences when this is linked between the
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can't normally do this the client should have a bigger max_allowed_packet.
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#define update_statistics(A)
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#define thd_increment_bytes_sent(N)
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#define TEST_BLOCKING 8
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/* Constants when using compression */
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#define NET_HEADER_SIZE 4 /* standard header size */
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#define COMP_HEADER_SIZE 3 /* compression header extra size */
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#define MAX_PACKET_LENGTH (256L*256L*256L-1)
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const char *not_error_sqlstate= "00000";
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static bool net_write_buff(NET *net, const unsigned char *packet, uint32_t len);
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static int drizzleclient_net_real_write(NET *net, const unsigned char *packet, size_t len);
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/** Init with packet info. */
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bool my_net_init(NET *net, Vio* vio)
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bool drizzleclient_net_init(NET *net, Vio* vio, uint32_t buffer_length)
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my_net_local_init(net); /* Set some limits */
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if (!(net->buff=(uchar*) my_malloc((size_t) net->max_packet+
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NET_HEADER_SIZE + COMP_HEADER_SIZE,
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net->max_packet= (uint32_t) buffer_length;
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net->max_packet_size= max(buffer_length,
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drizzled::global_system_variables.max_allowed_packet);
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if (!(net->buff=(unsigned char*) malloc((size_t) net->max_packet+
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NET_HEADER_SIZE + COMP_HEADER_SIZE)))
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net->buff_end=net->buff+net->max_packet;
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net->error=0; net->return_status=0;
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if (vio != 0) /* If real connection */
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if (vio != 0) /* If real connection */
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net->fd = vio_fd(vio); /* For perl DBI/DBD */
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net->fd = drizzleclient_vio_fd(vio); /* For perl DBI/DBD */
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drizzleclient_vio_fastsend(vio);
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void net_end(NET *net)
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my_free(net->buff,MYF(MY_ALLOW_ZERO_PTR));
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bool drizzleclient_net_init_sock(NET * net, int sock, int flags,
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uint32_t buffer_length)
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Vio *drizzleclient_vio_tmp= drizzleclient_vio_new(sock, VIO_TYPE_TCPIP, flags);
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if (drizzleclient_vio_tmp == NULL)
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if (drizzleclient_net_init(net, drizzleclient_vio_tmp, buffer_length))
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/* Only delete the temporary vio if we didn't already attach it to the
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if (drizzleclient_vio_tmp && (net->vio != drizzleclient_vio_tmp))
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drizzleclient_vio_delete(drizzleclient_vio_tmp);
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(void) shutdown(sock, SHUT_RDWR);
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void drizzleclient_net_end(NET *net)
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if (net->buff != NULL)
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void drizzleclient_net_close(NET *net)
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if (net->vio != NULL)
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drizzleclient_vio_delete(net->vio);
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bool drizzleclient_net_peer_addr(NET *net, char *buf, uint16_t *port, size_t buflen)
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return drizzleclient_vio_peer_addr(net->vio, buf, port, buflen);
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void drizzleclient_net_keepalive(NET *net, bool flag)
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drizzleclient_vio_keepalive(net->vio, flag);
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int drizzleclient_net_get_sd(NET *net)
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bool drizzleclient_net_more_data(NET *net)
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return (net->vio == 0 || net->vio->read_pos < net->vio->read_end);
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/** Realloc the packet buffer. */
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bool net_realloc(NET *net, size_t length)
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static bool drizzleclient_net_realloc(NET *net, size_t length)
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size_t pkt_length;
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if (length >= net->max_packet_size)
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/* @todo: 1 and 2 codes are identical. */
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net->last_errno= ER_NET_PACKET_TOO_LARGE;
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net->last_errno= CR_NET_PACKET_TOO_LARGE;
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pkt_length = (length+IO_SIZE-1) & ~(IO_SIZE-1);
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pkt_length = (length+IO_SIZE-1) & ~(IO_SIZE-1);
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We must allocate some extra bytes for the end 0 and to be able to
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read big compressed blocks
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if (!(buff= (uchar*) my_realloc((char*) net->buff, pkt_length +
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NET_HEADER_SIZE + COMP_HEADER_SIZE,
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if (!(buff= (unsigned char*) realloc((char*) net->buff, pkt_length +
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NET_HEADER_SIZE + COMP_HEADER_SIZE)))
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/* @todo: 1 and 2 codes are identical. */
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net->last_errno= ER_OUT_OF_RESOURCES;
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net->last_errno= CR_OUT_OF_MEMORY;
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/* In the server the error is reported by MY_WME flag. */
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Remove unwanted characters from connection
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and check if disconnected.
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Read from socket until there is nothing more to read. Discard
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If there is anything when to read 'net_clear' is called this
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normally indicates an error in the protocol.
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When connection is properly closed (for TCP it means with
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a FIN packet), then select() considers a socket "ready to read",
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in the sense that there's EOF to read, but read() returns 0.
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@param net NET handler
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@param clear_buffer if <> 0, then clear all data from comm buff
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Remove unwanted characters from connection
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and check if disconnected.
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Read from socket until there is nothing more to read. Discard
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If there is anything when to read 'drizzleclient_net_clear' is called this
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normally indicates an error in the protocol.
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When connection is properly closed (for TCP it means with
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a FIN packet), then select() considers a socket "ready to read",
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in the sense that there's EOF to read, but read() returns 0.
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@param net NET handler
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@param clear_buffer if <> 0, then clear all data from comm buff
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void net_clear(NET *net, bool clear_buffer)
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void drizzleclient_net_clear(NET *net, bool clear_buffer)
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if (clear_buffer)
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while (net_data_is_ready(net->vio->sd) > 0)
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/* The socket is ready */
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if (vio_read(net->vio, net->buff,
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(size_t) net->max_packet) <= 0)
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if (drizzleclient_vio_read(net->vio, net->buff,
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(size_t) net->max_packet) <= 0)
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net->pkt_nr=net->compress_pkt_nr=0; /* Ready for new command */
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net->pkt_nr=net->compress_pkt_nr=0; /* Ready for new command */
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net->write_pos=net->buff;
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/*****************************************************************************
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** Write something to server/client buffer
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*****************************************************************************/
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** Write something to server/client buffer
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*****************************************************************************/
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Write a logical packet with packet header.
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Format: Packet length (3 bytes), packet number(1 byte)
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When compression is used a 3 byte compression length is added
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If compression is used the original package is modified!
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Write a logical packet with packet header.
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Format: Packet length (3 bytes), packet number(1 byte)
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When compression is used a 3 byte compression length is added
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If compression is used the original package is modified!
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my_net_write(NET *net,const uchar *packet,size_t len)
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drizzleclient_net_write(NET *net,const unsigned char *packet,size_t len)
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uchar buff[NET_HEADER_SIZE];
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unsigned char buff[NET_HEADER_SIZE];
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if (unlikely(!net->vio)) /* nowhere to write */
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const uint32_t z_size = MAX_PACKET_LENGTH;
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int3store(buff, z_size);
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buff[3]= (uchar) net->pkt_nr++;
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buff[3]= (unsigned char) net->pkt_nr++;
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if (net_write_buff(net, buff, NET_HEADER_SIZE) ||
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net_write_buff(net, packet, z_size))
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net_write_buff(net, packet, z_size))
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packet += z_size;
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/* Write last packet */
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int3store(buff,len);
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buff[3]= (uchar) net->pkt_nr++;
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buff[3]= (unsigned char) net->pkt_nr++;
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if (net_write_buff(net, buff, NET_HEADER_SIZE))
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return test(net_write_buff(net,packet,len));
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return net_write_buff(net,packet,len) ? 1 : 0;
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Send a command to the server.
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The reason for having both header and packet is so that libdrizzle
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can easy add a header to a special command (like prepared statements)
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without having to re-alloc the string.
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As the command is part of the first data packet, we have to do some data
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juggling to put the command in there, without having to create a new
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This function will split big packets into sub-packets if needed.
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(Each sub packet can only be 2^24 bytes)
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@param net NET handler
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@param command Command in MySQL server (enum enum_server_command)
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@param header Header to write after command
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@param head_len Length of header
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@param packet Query or parameter to query
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@param len Length of packet
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Send a command to the server.
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The reason for having both header and packet is so that libdrizzle
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can easy add a header to a special command (like prepared statements)
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without having to re-alloc the string.
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As the command is part of the first data packet, we have to do some data
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juggling to put the command in there, without having to create a new
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This function will split big packets into sub-packets if needed.
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(Each sub packet can only be 2^24 bytes)
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@param net NET handler
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@param command Command in MySQL server (enum enum_server_command)
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@param header Header to write after command
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@param head_len Length of header
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@param packet Query or parameter to query
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@param len Length of packet
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net_write_command(NET *net,uchar command,
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const uchar *header, size_t head_len,
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const uchar *packet, size_t len)
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drizzleclient_net_write_command(NET *net,unsigned char command,
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const unsigned char *header, size_t head_len,
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const unsigned char *packet, size_t len)
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uint32_t length=len+1+head_len; /* 1 extra byte for command */
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uchar buff[NET_HEADER_SIZE+1];
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uint header_size=NET_HEADER_SIZE+1;
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uint32_t length=len+1+head_len; /* 1 extra byte for command */
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unsigned char buff[NET_HEADER_SIZE+1];
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uint32_t header_size=NET_HEADER_SIZE+1;
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buff[4]=command; /* For first packet */
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buff[4]=command; /* For first packet */
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if (length >= MAX_PACKET_LENGTH)
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int3store(buff, MAX_PACKET_LENGTH);
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buff[3]= (uchar) net->pkt_nr++;
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buff[3]= (unsigned char) net->pkt_nr++;
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if (net_write_buff(net, buff, header_size) ||
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net_write_buff(net, header, head_len) ||
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net_write_buff(net, packet, len))
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net_write_buff(net, header, head_len) ||
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net_write_buff(net, packet, len))
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length-= MAX_PACKET_LENGTH;
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len= MAX_PACKET_LENGTH;
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header_size= NET_HEADER_SIZE;
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} while (length >= MAX_PACKET_LENGTH);
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len=length; /* Data left to be written */
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len=length; /* Data left to be written */
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int3store(buff,length);
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buff[3]= (uchar) net->pkt_nr++;
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return(test(net_write_buff(net, buff, header_size) ||
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(head_len && net_write_buff(net, header, head_len)) ||
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net_write_buff(net, packet, len) || net_flush(net)));
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buff[3]= (unsigned char) net->pkt_nr++;
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return((net_write_buff(net, buff, header_size) ||
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(head_len && net_write_buff(net, header, head_len)) ||
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net_write_buff(net, packet, len) || drizzleclient_net_flush(net)) ? 1 : 0 );
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Caching the data in a local buffer before sending it.
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Caching the data in a local buffer before sending it.
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Fill up net->buffer and send it to the client when full.
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If the rest of the to-be-sent-packet is bigger than buffer,
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send it in one big block (to avoid copying to internal buffer).
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If not, copy the rest of the data to the buffer and return without
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@param net Network handler
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@param packet Packet to send
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@param len Length of packet
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The cached buffer can be sent as it is with 'net_flush()'.
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In this code we have to be careful to not send a packet longer than
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MAX_PACKET_LENGTH to net_real_write() if we are using the compressed
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protocol as we store the length of the compressed packet in 3 bytes.
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If the rest of the to-be-sent-packet is bigger than buffer,
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send it in one big block (to avoid copying to internal buffer).
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If not, copy the rest of the data to the buffer and return without
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@param net Network handler
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@param packet Packet to send
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@param len Length of packet
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The cached buffer can be sent as it is with 'drizzleclient_net_flush()'.
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In this code we have to be careful to not send a packet longer than
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MAX_PACKET_LENGTH to drizzleclient_net_real_write() if we are using the compressed
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protocol as we store the length of the compressed packet in 3 bytes.
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if (net->compress)
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We can't have bigger packets than 16M with compression
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Because the uncompressed length is stored in 3 bytes
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We can't have bigger packets than 16M with compression
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Because the uncompressed length is stored in 3 bytes
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left_length= MAX_PACKET_LENGTH;
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while (len > left_length)
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if (net_real_write(net, packet, left_length))
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packet+= left_length;
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if (drizzleclient_net_real_write(net, packet, left_length))
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packet+= left_length;
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if (len > net->max_packet)
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return net_real_write(net, packet, len) ? 1 : 0;
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return drizzleclient_net_real_write(net, packet, len) ? 1 : 0;
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/* Send out rest of the blocks as full sized blocks */
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memcpy(net->write_pos,packet,len);
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Read and write one packet using timeouts.
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If needed, the packet is compressed before sending.
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Read and write one packet using timeouts.
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If needed, the packet is compressed before sending.
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- TODO is it needed to set this variable if we have no socket
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- TODO is it needed to set this variable if we have no socket
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TODO: rewrite this in a manner to do non-block writes. If a write can not be made, and we are
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in the server, yield to another process and come back later.
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net_real_write(NET *net,const uchar *packet, size_t len)
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drizzleclient_net_real_write(NET *net, const unsigned char *packet, size_t len)
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const uchar *pos,*end;
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const unsigned char *pos, *end;
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uint32_t retry_count= 0;
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/* Backup of the original SO_RCVTIMEO timeout */
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struct timeval backtime;
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if (net->error == 2)
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return(-1); /* socket can't be used */
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return(-1); /* socket can't be used */
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net->reading_or_writing=2;
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477
if (net->compress)
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const uint header_length=NET_HEADER_SIZE+COMP_HEADER_SIZE;
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if (!(b= (uchar*) my_malloc(len + NET_HEADER_SIZE +
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COMP_HEADER_SIZE, MYF(MY_WME))))
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const uint32_t header_length=NET_HEADER_SIZE+COMP_HEADER_SIZE;
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if (!(b= (unsigned char*) malloc(len + NET_HEADER_SIZE +
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net->last_errno= ER_OUT_OF_RESOURCES;
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net->last_errno= CR_OUT_OF_MEMORY;
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/* In the server, the error is reported by MY_WME flag. */
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net->reading_or_writing= 0;
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memcpy(b+header_length,packet,len);
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if (my_compress(b+header_length, &len, &complen))
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complen= len * 120 / 100 + 12;
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unsigned char * compbuf= (unsigned char *) malloc(complen);
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uLongf tmp_complen= complen;
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int res= compress((Bytef*) compbuf, &tmp_complen,
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(Bytef*) (b+header_length),
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complen= tmp_complen;
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if ((res != Z_OK) || (complen >= len))
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size_t tmplen= complen;
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518
int3store(&b[NET_HEADER_SIZE],complen);
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519
int3store(b,len);
433
b[3]=(uchar) (net->compress_pkt_nr++);
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b[3]=(unsigned char) (net->compress_pkt_nr++);
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521
len+= header_length;
438
/* Check for error, currently assert */
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if (net->write_timeout)
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struct timeval waittime;
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waittime.tv_sec= net->write_timeout;
447
memset(&backtime, 0, sizeof(struct timeval));
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length= sizeof(struct timeval);
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error= getsockopt(net->vio->sd, SOL_SOCKET, SO_RCVTIMEO,
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perror("getsockopt");
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error= setsockopt(net->vio->sd, SOL_SOCKET, SO_RCVTIMEO,
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&waittime, (socklen_t)sizeof(struct timeval));
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/* Loop until we have read everything */
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while (pos != end)
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if ((long) (length= vio_write(net->vio,pos,(size_t) (end-pos))) <= 0)
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if ((long) (length= drizzleclient_vio_write(net->vio, pos, (size_t) (end-pos))) <= 0)
467
const bool interrupted= vio_should_retry(net->vio);
469
If we read 0, or we were interrupted this means that
470
we need to switch to blocking mode and wait until the timeout
534
* We could end up here with net->vio == NULL
536
* If that is the case, we exit the while loop
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if (net->vio == NULL)
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const bool interrupted= drizzleclient_vio_should_retry(net->vio);
543
If we read 0, or we were interrupted this means that
544
we need to switch to blocking mode and wait until the timeout
471
545
on the socket kicks in.
473
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if ((interrupted || length == 0))
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while (vio_blocking(net->vio, true, &old_mode) < 0)
551
while (drizzleclient_vio_blocking(net->vio, true, &old_mode) < 0)
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if (vio_should_retry(net->vio) && retry_count++ < net->retry_count)
553
if (drizzleclient_vio_should_retry(net->vio) && retry_count++ < net->retry_count)
481
555
net->error= 2; /* Close socket */
482
net->last_errno= ER_NET_PACKET_TOO_LARGE;
556
net->last_errno= CR_NET_PACKET_TOO_LARGE;
490
564
if (retry_count++ < net->retry_count)
494
if (vio_errno(net->vio) == SOCKET_EINTR)
568
if (drizzleclient_vio_errno(net->vio) == EINTR)
498
net->error= 2; /* Close socket */
499
net->last_errno= (interrupted ? ER_NET_WRITE_INTERRUPTED :
500
ER_NET_ERROR_ON_WRITE);
572
net->error= 2; /* Close socket */
573
net->last_errno= (interrupted ? CR_NET_WRITE_INTERRUPTED :
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CR_NET_ERROR_ON_WRITE);
504
update_statistics(thd_increment_bytes_sent(length));
508
my_free((char*) packet,MYF(0));
580
if ((net->compress) && (packet != NULL))
581
free((char*) packet);
509
582
net->reading_or_writing=0;
511
if (net->write_timeout)
512
error= setsockopt(net->vio->sd, SOL_SOCKET, SO_RCVTIMEO,
513
&backtime, (socklen_t)sizeof(struct timeval));
515
584
return(((int) (pos != end)));
520
Reads one packet to net->buff + net->where_b.
521
Long packets are handled by my_net_read().
522
This function reallocates the net->buff buffer if necessary.
589
Reads one packet to net->buff + net->where_b.
590
Long packets are handled by drizzleclient_net_read().
591
This function reallocates the net->buff buffer if necessary.
525
Returns length of packet.
594
Returns length of packet.
529
598
my_real_read(NET *net, size_t *complen)
533
uint i,retry_count=0;
534
uint32_t len=packet_error;
602
uint32_t i,retry_count=0;
603
size_t len=packet_error;
535
604
uint32_t remain= (net->compress ? NET_HEADER_SIZE+COMP_HEADER_SIZE :
537
/* Backup of the original SO_RCVTIMEO timeout */
538
struct timeval backtime;
543
609
net->reading_or_writing= 1;
544
/* Read timeout is set in my_net_set_read_timeout */
546
pos = net->buff + net->where_b; /* net->packet -4 */
549
/* Check for error, currently assert */
550
if (net->read_timeout)
552
struct timeval waittime;
555
waittime.tv_sec= net->read_timeout;
558
memset(&backtime, 0, sizeof(struct timeval));
559
length= sizeof(struct timeval);
560
error= getsockopt(net->vio->sd, SOL_SOCKET, SO_RCVTIMEO,
564
perror("getsockopt");
567
error= setsockopt(net->vio->sd, SOL_SOCKET, SO_RCVTIMEO,
568
&waittime, (socklen_t)sizeof(struct timeval));
610
/* Read timeout is set in drizzleclient_net_set_read_timeout */
612
pos = net->buff + net->where_b; /* net->packet -4 */
572
614
for (i= 0; i < 2 ; i++)
574
616
while (remain > 0)
576
618
/* First read is done with non blocking mode */
577
if ((long) (length= vio_read(net->vio, pos, remain)) <= 0L)
619
if ((long) (length= drizzleclient_vio_read(net->vio, pos, remain)) <= 0L)
579
const bool interrupted = vio_should_retry(net->vio);
621
if (net->vio == NULL)
624
const bool interrupted = drizzleclient_vio_should_retry(net->vio);
582
{ /* Probably in MIT threads */
627
{ /* Probably in MIT threads */
583
628
if (retry_count++ < net->retry_count)
586
if (vio_errno(net->vio) == SOCKET_EINTR)
631
if (drizzleclient_vio_errno(net->vio) == EINTR)
590
635
len= packet_error;
591
net->error= 2; /* Close socket */
592
net->last_errno= (vio_was_interrupted(net->vio) ?
593
ER_NET_READ_INTERRUPTED :
595
my_error(net->last_errno, MYF(0));
636
net->error= 2; /* Close socket */
637
net->last_errno= (drizzleclient_vio_was_interrupted(net->vio) ?
638
CR_NET_READ_INTERRUPTED :
598
643
remain -= (uint32_t) length;
600
update_statistics(thd_increment_bytes_received(length));
603
{ /* First parts is packet length */
647
{ /* First parts is packet length */
604
648
uint32_t helping;
606
if (net->buff[net->where_b + 3] != (uchar) net->pkt_nr)
650
if (net->buff[net->where_b + 3] != (unsigned char) net->pkt_nr)
608
652
len= packet_error;
609
653
/* Not a NET error on the client. XXX: why? */
652
Read a packet from the client/server and return it without the internal
655
If the packet is the first packet of a multi-packet packet
656
(which is indicated by the length of the packet = 0xffffff) then
657
all sub packets are read and concatenated.
659
If the packet was compressed, its uncompressed and the length of the
660
uncompressed packet is returned.
663
The function returns the length of the found packet or packet_error.
664
net->read_pos points to the read data.
692
Read a packet from the client/server and return it without the internal
695
If the packet is the first packet of a multi-packet packet
696
(which is indicated by the length of the packet = 0xffffff) then
697
all sub packets are read and concatenated.
699
If the packet was compressed, its uncompressed and the length of the
700
uncompressed packet is returned.
703
The function returns the length of the found packet or packet_error.
704
net->read_pos points to the read data.
668
my_net_read(NET *net)
708
drizzleclient_net_read(NET *net)
670
710
size_t len, complen;
721
761
if (buf_length - start_of_packet >= NET_HEADER_SIZE)
723
read_length = uint3korr(net->buff+start_of_packet);
726
/* End of multi-byte packet */
727
start_of_packet += NET_HEADER_SIZE;
730
if (read_length + NET_HEADER_SIZE <= buf_length - start_of_packet)
732
if (multi_byte_packet)
734
/* Remove packet header for second packet */
735
memmove(net->buff + first_packet_offset + start_of_packet,
736
net->buff + first_packet_offset + start_of_packet +
738
buf_length - start_of_packet);
739
start_of_packet += read_length;
740
buf_length -= NET_HEADER_SIZE;
743
start_of_packet+= read_length + NET_HEADER_SIZE;
763
read_length = uint3korr(net->buff+start_of_packet);
766
/* End of multi-byte packet */
767
start_of_packet += NET_HEADER_SIZE;
770
if (read_length + NET_HEADER_SIZE <= buf_length - start_of_packet)
772
if (multi_byte_packet)
774
/* Remove packet header for second packet */
775
memmove(net->buff + first_packet_offset + start_of_packet,
776
net->buff + first_packet_offset + start_of_packet +
778
buf_length - start_of_packet);
779
start_of_packet += read_length;
780
buf_length -= NET_HEADER_SIZE;
783
start_of_packet+= read_length + NET_HEADER_SIZE;
745
if (read_length != MAX_PACKET_LENGTH) /* last package */
747
multi_byte_packet= 0; /* No last zero len packet */
750
multi_byte_packet= NET_HEADER_SIZE;
751
/* Move data down to read next data packet after current one */
752
if (first_packet_offset)
754
memmove(net->buff,net->buff+first_packet_offset,
755
buf_length-first_packet_offset);
756
buf_length-=first_packet_offset;
757
start_of_packet -= first_packet_offset;
758
first_packet_offset=0;
785
if (read_length != MAX_PACKET_LENGTH) /* last package */
787
multi_byte_packet= 0; /* No last zero len packet */
790
multi_byte_packet= NET_HEADER_SIZE;
791
/* Move data down to read next data packet after current one */
792
if (first_packet_offset)
794
memmove(net->buff,net->buff+first_packet_offset,
795
buf_length-first_packet_offset);
796
buf_length-=first_packet_offset;
797
start_of_packet -= first_packet_offset;
798
first_packet_offset=0;
763
803
/* Move data down to read next data packet after current one */
764
804
if (first_packet_offset)
766
memmove(net->buff,net->buff+first_packet_offset,
767
buf_length-first_packet_offset);
768
buf_length-=first_packet_offset;
769
start_of_packet -= first_packet_offset;
770
first_packet_offset=0;
806
memmove(net->buff,net->buff+first_packet_offset,
807
buf_length-first_packet_offset);
808
buf_length-=first_packet_offset;
809
start_of_packet -= first_packet_offset;
810
first_packet_offset=0;
773
813
net->where_b=buf_length;
774
814
if ((packet_len = my_real_read(net,&complen)) == packet_error)
776
if (my_uncompress(net->buff + net->where_b, packet_len,
779
net->error= 2; /* caller will close socket */
780
net->last_errno= ER_NET_UNCOMPRESS_ERROR;
819
unsigned char * compbuf= (unsigned char *) malloc(complen);
822
uLongf tmp_complen= complen;
823
int error= uncompress((Bytef*) compbuf, &tmp_complen,
824
(Bytef*) (net->buff + net->where_b),
826
complen= tmp_complen;
830
net->error= 2; /* caller will close socket */
831
net->last_errno= CR_NET_UNCOMPRESS_ERROR;
835
memcpy((net->buff + net->where_b), compbuf, complen);
783
buf_length+= complen;
844
buf_length+= complen;
786
846
net->read_pos= net->buff+ first_packet_offset + NET_HEADER_SIZE;
787
847
net->buf_length= buf_length;
788
848
net->remain_in_buf= (uint32_t) (buf_length - start_of_packet);
789
849
len = ((uint32_t) (start_of_packet - first_packet_offset) - NET_HEADER_SIZE -
790
850
multi_byte_packet);
791
net->save_char= net->read_pos[len]; /* Must be saved */
792
net->read_pos[len]=0; /* Safeguard for drizzle_use_result */
851
net->save_char= net->read_pos[len]; /* Must be saved */
852
net->read_pos[len]=0; /* Safeguard for drizzleclient_use_result */
798
void my_net_set_read_timeout(NET *net, uint timeout)
858
void drizzleclient_net_set_read_timeout(NET *net, uint32_t timeout)
800
860
net->read_timeout= timeout;
802
vio_timeout(net->vio, 0, timeout);
863
drizzleclient_vio_timeout(net->vio, 0, timeout);
807
void my_net_set_write_timeout(NET *net, uint timeout)
869
void drizzleclient_net_set_write_timeout(NET *net, uint32_t timeout)
809
871
net->write_timeout= timeout;
811
vio_timeout(net->vio, 1, timeout);
874
drizzleclient_vio_timeout(net->vio, 1, timeout);
879
Clear possible error state of struct NET
881
@param net clear the state of the argument
884
void drizzleclient_drizzleclient_net_clear_error(NET *net)
887
net->last_error[0]= '\0';
888
strcpy(net->sqlstate, not_error_sqlstate);