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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, 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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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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int3store(&b[NET_HEADER_SIZE],complen);
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518
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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520
len+= header_length;
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/* 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;
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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)
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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
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* We could end up here with net->vio == NULL
535
* 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);
542
If we read 0, or we were interrupted this means that
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we need to switch to blocking mode and wait until the timeout
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544
on the socket kicks in.
473
546
if ((interrupted || length == 0))
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while (vio_blocking(net->vio, true, &old_mode) < 0)
550
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)
552
if (drizzleclient_vio_should_retry(net->vio) && retry_count++ < net->retry_count)
481
554
net->error= 2; /* Close socket */
482
net->last_errno= ER_NET_PACKET_TOO_LARGE;
555
net->last_errno= CR_NET_PACKET_TOO_LARGE;
490
563
if (retry_count++ < net->retry_count)
494
if (vio_errno(net->vio) == SOCKET_EINTR)
567
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);
571
net->error= 2; /* Close socket */
572
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));
579
if ((net->compress) && (packet != NULL))
580
free((char*) packet);
509
581
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
583
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.
588
Reads one packet to net->buff + net->where_b.
589
Long packets are handled by drizzleclient_net_read().
590
This function reallocates the net->buff buffer if necessary.
525
Returns length of packet.
593
Returns length of packet.
529
597
my_real_read(NET *net, size_t *complen)
533
uint i,retry_count=0;
534
uint32_t len=packet_error;
601
uint32_t i,retry_count=0;
602
size_t len=packet_error;
535
603
uint32_t remain= (net->compress ? NET_HEADER_SIZE+COMP_HEADER_SIZE :
537
/* Backup of the original SO_RCVTIMEO timeout */
538
struct timeval backtime;
543
608
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));
609
/* Read timeout is set in drizzleclient_net_set_read_timeout */
611
pos = net->buff + net->where_b; /* net->packet -4 */
572
613
for (i= 0; i < 2 ; i++)
574
615
while (remain > 0)
576
617
/* First read is done with non blocking mode */
577
if ((long) (length= vio_read(net->vio, pos, remain)) <= 0L)
618
if ((long) (length= drizzleclient_vio_read(net->vio, pos, remain)) <= 0L)
579
const bool interrupted = vio_should_retry(net->vio);
620
if (net->vio == NULL)
623
const bool interrupted = drizzleclient_vio_should_retry(net->vio);
582
{ /* Probably in MIT threads */
626
{ /* Probably in MIT threads */
583
627
if (retry_count++ < net->retry_count)
586
if (vio_errno(net->vio) == SOCKET_EINTR)
630
if (drizzleclient_vio_errno(net->vio) == EINTR)
590
634
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));
635
net->error= 2; /* Close socket */
636
net->last_errno= (drizzleclient_vio_was_interrupted(net->vio) ?
637
CR_NET_READ_INTERRUPTED :
598
642
remain -= (uint32_t) length;
600
update_statistics(thd_increment_bytes_received(length));
603
{ /* First parts is packet length */
646
{ /* First parts is packet length */
604
647
uint32_t helping;
606
if (net->buff[net->where_b + 3] != (uchar) net->pkt_nr)
649
if (net->buff[net->where_b + 3] != (unsigned char) net->pkt_nr)
608
651
len= packet_error;
609
652
/* 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.
691
Read a packet from the client/server and return it without the internal
694
If the packet is the first packet of a multi-packet packet
695
(which is indicated by the length of the packet = 0xffffff) then
696
all sub packets are read and concatenated.
698
If the packet was compressed, its uncompressed and the length of the
699
uncompressed packet is returned.
702
The function returns the length of the found packet or packet_error.
703
net->read_pos points to the read data.
668
my_net_read(NET *net)
707
drizzleclient_net_read(NET *net)
670
709
size_t len, complen;
721
760
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;
762
read_length = uint3korr(net->buff+start_of_packet);
765
/* End of multi-byte packet */
766
start_of_packet += NET_HEADER_SIZE;
769
if (read_length + NET_HEADER_SIZE <= buf_length - start_of_packet)
771
if (multi_byte_packet)
773
/* Remove packet header for second packet */
774
memmove(net->buff + first_packet_offset + start_of_packet,
775
net->buff + first_packet_offset + start_of_packet +
777
buf_length - start_of_packet);
778
start_of_packet += read_length;
779
buf_length -= NET_HEADER_SIZE;
782
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;
784
if (read_length != MAX_PACKET_LENGTH) /* last package */
786
multi_byte_packet= 0; /* No last zero len packet */
789
multi_byte_packet= NET_HEADER_SIZE;
790
/* Move data down to read next data packet after current one */
791
if (first_packet_offset)
793
memmove(net->buff,net->buff+first_packet_offset,
794
buf_length-first_packet_offset);
795
buf_length-=first_packet_offset;
796
start_of_packet -= first_packet_offset;
797
first_packet_offset=0;
763
802
/* Move data down to read next data packet after current one */
764
803
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;
805
memmove(net->buff,net->buff+first_packet_offset,
806
buf_length-first_packet_offset);
807
buf_length-=first_packet_offset;
808
start_of_packet -= first_packet_offset;
809
first_packet_offset=0;
773
812
net->where_b=buf_length;
774
813
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;
818
unsigned char * compbuf= (unsigned char *) malloc(complen);
821
uLongf tmp_complen= complen;
822
int error= uncompress((Bytef*) compbuf, &tmp_complen,
823
(Bytef*) (net->buff + net->where_b),
825
complen= tmp_complen;
829
net->error= 2; /* caller will close socket */
830
net->last_errno= CR_NET_UNCOMPRESS_ERROR;
834
memcpy((net->buff + net->where_b), compbuf, complen);
783
buf_length+= complen;
843
buf_length+= complen;
786
845
net->read_pos= net->buff+ first_packet_offset + NET_HEADER_SIZE;
787
846
net->buf_length= buf_length;
788
847
net->remain_in_buf= (uint32_t) (buf_length - start_of_packet);
789
848
len = ((uint32_t) (start_of_packet - first_packet_offset) - NET_HEADER_SIZE -
790
849
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 */
850
net->save_char= net->read_pos[len]; /* Must be saved */
851
net->read_pos[len]=0; /* Safeguard for drizzleclient_use_result */
798
void my_net_set_read_timeout(NET *net, uint timeout)
857
void drizzleclient_net_set_read_timeout(NET *net, uint32_t timeout)
800
859
net->read_timeout= timeout;
802
vio_timeout(net->vio, 0, timeout);
862
drizzleclient_vio_timeout(net->vio, 0, timeout);
807
void my_net_set_write_timeout(NET *net, uint timeout)
868
void drizzleclient_net_set_write_timeout(NET *net, uint32_t timeout)
809
870
net->write_timeout= timeout;
811
vio_timeout(net->vio, 1, timeout);
873
drizzleclient_vio_timeout(net->vio, 1, timeout);
878
Clear possible error state of struct NET
880
@param net clear the state of the argument
883
void drizzleclient_drizzleclient_net_clear_error(NET *net)
886
net->last_error[0]= '\0';
887
strcpy(net->sqlstate, not_error_sqlstate);