971.7.10
by Eric Day
Duplicated oldlibdrizzle module, one for Drizzle protocol and one for MySQL, per Brian's request from merge proposal. Port options are now --drizzle-protocol-port and --mysql-protocol-port. |
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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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*
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* Copyright (C) 2008 Sun Microsystems, Inc.
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*
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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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*
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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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*
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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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*/
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#include <drizzled/global.h> |
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#include <drizzled/session.h> |
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#include <assert.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <sys/socket.h> |
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#include <sys/poll.h> |
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#include <zlib.h> |
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#include <algorithm> |
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#include "errmsg.h" |
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#include "vio.h" |
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#include "net_serv.h" |
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using namespace std; |
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/*
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The following handles the differences when this is linked between the
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client and the server.
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This gives an error if a too big packet is found
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The server can change this with the -O switch, but because the client
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can't normally do this the client should have a bigger max_allowed_packet.
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*/
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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 drizzleclient_net_init(NET *net, Vio* vio, uint32_t buffer_length) |
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{
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net->vio = vio; |
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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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return(1); |
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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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net->pkt_nr=net->compress_pkt_nr=0; |
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net->write_pos=net->read_pos = net->buff; |
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net->last_error[0]=0; |
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net->compress=0; net->reading_or_writing=0; |
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net->where_b = net->remain_in_buf=0; |
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net->last_errno=0; |
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net->unused= 0; |
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if (vio != 0) /* If real connection */ |
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{
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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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}
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return(0); |
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}
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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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{
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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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return true; |
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else
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if (drizzleclient_net_init(net, drizzleclient_vio_tmp, buffer_length)) |
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{
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/* Only delete the temporary vio if we didn't already attach it to the
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* NET object.
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*/
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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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else
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{
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(void) shutdown(sock, SHUT_RDWR); |
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(void) close(sock); |
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}
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return true; |
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}
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return false; |
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}
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void drizzleclient_net_end(NET *net) |
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{
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if (net->buff != NULL) |
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free(net->buff); |
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net->buff= NULL; |
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return; |
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}
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void drizzleclient_net_close(NET *net) |
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{
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if (net->vio != NULL) |
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{
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drizzleclient_vio_delete(net->vio); |
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net->vio= 0; |
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}
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}
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bool drizzleclient_net_peer_addr(NET *net, char *buf, uint16_t *port, size_t buflen) |
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{
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return drizzleclient_vio_peer_addr(net->vio, buf, port, buflen); |
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}
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void drizzleclient_net_keepalive(NET *net, bool flag) |
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{
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drizzleclient_vio_keepalive(net->vio, flag); |
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}
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int drizzleclient_net_get_sd(NET *net) |
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{
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return net->vio->sd; |
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}
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bool drizzleclient_net_more_data(NET *net) |
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{
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return (net->vio == 0 || net->vio->read_pos < net->vio->read_end); |
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}
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/** Realloc the packet buffer. */
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static bool drizzleclient_net_realloc(NET *net, size_t length) |
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{
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unsigned char *buff; |
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size_t pkt_length; |
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if (length >= net->max_packet_size) |
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{
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/* @todo: 1 and 2 codes are identical. */
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net->error= 1; |
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net->last_errno= CR_NET_PACKET_TOO_LARGE; |
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return(1); |
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}
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pkt_length = (length+IO_SIZE-1) & ~(IO_SIZE-1); |
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/*
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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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*/
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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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{
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/* @todo: 1 and 2 codes are identical. */
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net->error= 1; |
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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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return(1); |
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}
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net->buff=net->write_pos=buff; |
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net->buff_end=buff+(net->max_packet= (uint32_t) pkt_length); |
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return(0); |
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}
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/**
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Check if there is any data to be read from the socket.
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@param sd socket descriptor
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@retval
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0 No data to read
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@retval
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1 Data or EOF to read
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@retval
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-1 Don't know if data is ready or not
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*/
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static bool net_data_is_ready(int sd) |
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{
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struct pollfd ufds; |
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int res; |
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ufds.fd= sd; |
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ufds.events= POLLIN | POLLPRI; |
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if (!(res= poll(&ufds, 1, 0))) |
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return 0; |
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if (res < 0 || !(ufds.revents & (POLLIN | POLLPRI))) |
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return 0; |
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return 1; |
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}
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/**
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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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what is read.
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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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*/
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void drizzleclient_net_clear(NET *net, bool clear_buffer) |
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{
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if (clear_buffer) |
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{
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while (net_data_is_ready(net->vio->sd) > 0) |
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{
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/* The socket is ready */
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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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{
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net->error= 2; |
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break; |
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}
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}
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}
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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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return; |
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}
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/** Flush write_buffer if not empty. */
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bool drizzleclient_net_flush(NET *net) |
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{
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bool error= 0; |
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if (net->buff != net->write_pos) |
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{
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error=drizzleclient_net_real_write(net, net->buff, |
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(size_t) (net->write_pos - net->buff)) ? 1 : 0; |
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net->write_pos=net->buff; |
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}
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/* Sync packet number if using compression */
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if (net->compress) |
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net->pkt_nr=net->compress_pkt_nr; |
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return(error); |
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}
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/*****************************************************************************
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** Write something to server/client buffer
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*****************************************************************************/
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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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@note
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If compression is used the original package is modified!
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*/
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bool
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drizzleclient_net_write(NET *net,const unsigned char *packet,size_t len) |
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{
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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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return 0; |
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/*
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Big packets are handled by splitting them in packets of MAX_PACKET_LENGTH
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length. The last packet is always a packet that is < MAX_PACKET_LENGTH.
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(The last packet may even have a length of 0)
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*/
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while (len >= MAX_PACKET_LENGTH) |
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{
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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]= (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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return 1; |
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packet += z_size; |
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len-= z_size; |
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}
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/* Write last packet */
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int3store(buff,len); |
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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 1; |
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return net_write_buff(net,packet,len) ? 1 : 0; |
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}
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/**
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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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packet.
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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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@retval
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0 ok
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@retval
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1 error
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*/
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bool
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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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{
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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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if (length >= MAX_PACKET_LENGTH) |
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{
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/* Take into account that we have the command in the first header */
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len= MAX_PACKET_LENGTH - 1 - head_len; |
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do
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{
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int3store(buff, MAX_PACKET_LENGTH); |
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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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return(1); |
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packet+= len; |
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length-= MAX_PACKET_LENGTH; |
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len= MAX_PACKET_LENGTH; |
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head_len= 0; |
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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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}
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int3store(buff,length); |
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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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}
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/**
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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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sending data.
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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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@note
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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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@retval
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0 ok
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@retval
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1
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*/
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static bool |
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net_write_buff(NET *net, const unsigned char *packet, uint32_t len) |
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{
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uint32_t left_length; |
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if (net->compress && net->max_packet > MAX_PACKET_LENGTH) |
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left_length= MAX_PACKET_LENGTH - (net->write_pos - net->buff); |
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else
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left_length= (uint32_t) (net->buff_end - net->write_pos); |
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if (len > left_length) |
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{
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if (net->write_pos != net->buff) |
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{
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/* Fill up already used packet and write it */
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memcpy(net->write_pos,packet,left_length); |
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if (drizzleclient_net_real_write(net, net->buff, |
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(size_t) (net->write_pos - net->buff) + left_length)) |
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return 1; |
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net->write_pos= net->buff; |
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packet+= left_length; |
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len-= left_length; |
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}
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if (net->compress) |
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{
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/*
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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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*/
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left_length= MAX_PACKET_LENGTH; |
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while (len > left_length) |
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{
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if (drizzleclient_net_real_write(net, packet, left_length)) |
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return 1; |
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packet+= left_length; |
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len-= left_length; |
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}
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}
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if (len > net->max_packet) |
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return drizzleclient_net_real_write(net, packet, len) ? 1 : 0; |
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440 |
/* Send out rest of the blocks as full sized blocks */
|
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}
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memcpy(net->write_pos,packet,len); |
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443 |
net->write_pos+= len; |
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444 |
return 0; |
|
445 |
}
|
|
446 |
||
447 |
||
448 |
/**
|
|
449 |
Read and write one packet using timeouts.
|
|
450 |
If needed, the packet is compressed before sending.
|
|
451 |
||
452 |
@todo
|
|
453 |
- TODO is it needed to set this variable if we have no socket
|
|
454 |
*/
|
|
455 |
||
456 |
/*
|
|
457 |
TODO: rewrite this in a manner to do non-block writes. If a write can not be made, and we are
|
|
458 |
in the server, yield to another process and come back later.
|
|
459 |
*/
|
|
460 |
static int |
|
461 |
drizzleclient_net_real_write(NET *net, const unsigned char *packet, size_t len) |
|
462 |
{
|
|
463 |
size_t length; |
|
464 |
const unsigned char *pos, *end; |
|
465 |
uint32_t retry_count= 0; |
|
466 |
||
467 |
/* Backup of the original SO_RCVTIMEO timeout */
|
|
468 |
||
469 |
if (net->error == 2) |
|
470 |
return(-1); /* socket can't be used */ |
|
471 |
||
472 |
net->reading_or_writing=2; |
|
473 |
if (net->compress) |
|
474 |
{
|
|
475 |
size_t complen; |
|
476 |
unsigned char *b; |
|
477 |
const uint32_t header_length=NET_HEADER_SIZE+COMP_HEADER_SIZE; |
|
478 |
if (!(b= (unsigned char*) malloc(len + NET_HEADER_SIZE + |
|
479 |
COMP_HEADER_SIZE))) |
|
480 |
{
|
|
481 |
net->error= 2; |
|
482 |
net->last_errno= CR_OUT_OF_MEMORY; |
|
483 |
/* In the server, the error is reported by MY_WME flag. */
|
|
484 |
net->reading_or_writing= 0; |
|
485 |
return(1); |
|
486 |
}
|
|
487 |
memcpy(b+header_length,packet,len); |
|
488 |
||
489 |
complen= len * 120 / 100 + 12; |
|
490 |
unsigned char * compbuf= (unsigned char *) malloc(complen); |
|
491 |
if (compbuf != NULL) |
|
492 |
{
|
|
493 |
uLongf tmp_complen= complen; |
|
494 |
int res= compress((Bytef*) compbuf, &tmp_complen, |
|
495 |
(Bytef*) (b+header_length), |
|
496 |
len); |
|
497 |
complen= tmp_complen; |
|
498 |
||
499 |
free(compbuf); |
|
500 |
||
501 |
if ((res != Z_OK) || (complen >= len)) |
|
502 |
complen= 0; |
|
503 |
else
|
|
504 |
{
|
|
505 |
size_t tmplen= complen; |
|
506 |
complen= len; |
|
507 |
len= tmplen; |
|
508 |
}
|
|
509 |
}
|
|
510 |
else
|
|
511 |
{
|
|
512 |
complen=0; |
|
513 |
}
|
|
514 |
int3store(&b[NET_HEADER_SIZE],complen); |
|
515 |
int3store(b,len); |
|
516 |
b[3]=(unsigned char) (net->compress_pkt_nr++); |
|
517 |
len+= header_length; |
|
518 |
packet= b; |
|
519 |
}
|
|
520 |
||
521 |
pos= packet; |
|
522 |
end=pos+len; |
|
523 |
/* Loop until we have read everything */
|
|
524 |
while (pos != end) |
|
525 |
{
|
|
526 |
assert(pos); |
|
527 |
if ((long) (length= drizzleclient_vio_write(net->vio, pos, (size_t) (end-pos))) <= 0) |
|
528 |
{
|
|
529 |
/*
|
|
530 |
* We could end up here with net->vio == NULL
|
|
531 |
* See LP bug#436685
|
|
532 |
* If that is the case, we exit the while loop
|
|
533 |
*/
|
|
534 |
if (net->vio == NULL) |
|
535 |
break; |
|
536 |
||
537 |
const bool interrupted= drizzleclient_vio_should_retry(net->vio); |
|
538 |
/*
|
|
539 |
If we read 0, or we were interrupted this means that
|
|
540 |
we need to switch to blocking mode and wait until the timeout
|
|
541 |
on the socket kicks in.
|
|
542 |
*/
|
|
543 |
if ((interrupted || length == 0)) |
|
544 |
{
|
|
545 |
bool old_mode; |
|
546 |
||
547 |
while (drizzleclient_vio_blocking(net->vio, true, &old_mode) < 0) |
|
548 |
{
|
|
549 |
if (drizzleclient_vio_should_retry(net->vio) && retry_count++ < net->retry_count) |
|
550 |
continue; |
|
551 |
net->error= 2; /* Close socket */ |
|
552 |
net->last_errno= CR_NET_PACKET_TOO_LARGE; |
|
553 |
goto end; |
|
554 |
}
|
|
555 |
retry_count=0; |
|
556 |
continue; |
|
557 |
}
|
|
558 |
else
|
|
559 |
{
|
|
560 |
if (retry_count++ < net->retry_count) |
|
561 |
continue; |
|
562 |
}
|
|
563 |
||
564 |
if (drizzleclient_vio_errno(net->vio) == EINTR) |
|
565 |
{
|
|
566 |
continue; |
|
567 |
}
|
|
568 |
net->error= 2; /* Close socket */ |
|
569 |
net->last_errno= (interrupted ? CR_NET_WRITE_INTERRUPTED : |
|
570 |
CR_NET_ERROR_ON_WRITE); |
|
571 |
break; |
|
572 |
}
|
|
573 |
pos+=length; |
|
574 |
}
|
|
575 |
end: |
|
576 |
if ((net->compress) && (packet != NULL)) |
|
577 |
free((char*) packet); |
|
578 |
net->reading_or_writing=0; |
|
579 |
||
580 |
return(((int) (pos != end))); |
|
581 |
}
|
|
582 |
||
583 |
||
584 |
/**
|
|
585 |
Reads one packet to net->buff + net->where_b.
|
|
586 |
Long packets are handled by drizzleclient_net_read().
|
|
587 |
This function reallocates the net->buff buffer if necessary.
|
|
588 |
||
589 |
@return
|
|
590 |
Returns length of packet.
|
|
591 |
*/
|
|
592 |
||
593 |
static uint32_t |
|
594 |
my_real_read(NET *net, size_t *complen) |
|
595 |
{
|
|
596 |
unsigned char *pos; |
|
597 |
size_t length; |
|
598 |
uint32_t i,retry_count=0; |
|
599 |
size_t len=packet_error; |
|
600 |
uint32_t remain= (net->compress ? NET_HEADER_SIZE+COMP_HEADER_SIZE : |
|
601 |
NET_HEADER_SIZE); |
|
602 |
||
603 |
*complen = 0; |
|
604 |
||
605 |
net->reading_or_writing= 1; |
|
606 |
/* Read timeout is set in drizzleclient_net_set_read_timeout */
|
|
607 |
||
608 |
pos = net->buff + net->where_b; /* net->packet -4 */ |
|
609 |
||
610 |
for (i= 0; i < 2 ; i++) |
|
611 |
{
|
|
612 |
while (remain > 0) |
|
613 |
{
|
|
614 |
/* First read is done with non blocking mode */
|
|
615 |
if ((long) (length= drizzleclient_vio_read(net->vio, pos, remain)) <= 0L) |
|
616 |
{
|
|
617 |
if (net->vio == NULL) |
|
618 |
goto end; |
|
619 |
||
620 |
const bool interrupted = drizzleclient_vio_should_retry(net->vio); |
|
621 |
||
622 |
if (interrupted) |
|
623 |
{ /* Probably in MIT threads */ |
|
624 |
if (retry_count++ < net->retry_count) |
|
625 |
continue; |
|
626 |
}
|
|
627 |
if (drizzleclient_vio_errno(net->vio) == EINTR) |
|
628 |
{
|
|
629 |
continue; |
|
630 |
}
|
|
631 |
len= packet_error; |
|
632 |
net->error= 2; /* Close socket */ |
|
633 |
net->last_errno= (drizzleclient_vio_was_interrupted(net->vio) ? |
|
634 |
CR_NET_READ_INTERRUPTED : |
|
635 |
CR_NET_READ_ERROR); |
|
636 |
ER(net->last_errno); |
|
637 |
goto end; |
|
638 |
}
|
|
639 |
remain -= (uint32_t) length; |
|
640 |
pos+= length; |
|
641 |
}
|
|
642 |
if (i == 0) |
|
643 |
{ /* First parts is packet length */ |
|
644 |
uint32_t helping; |
|
645 |
||
646 |
if (net->buff[net->where_b + 3] != (unsigned char) net->pkt_nr) |
|
647 |
{
|
|
648 |
len= packet_error; |
|
649 |
/* Not a NET error on the client. XXX: why? */
|
|
650 |
goto end; |
|
651 |
}
|
|
652 |
net->compress_pkt_nr= ++net->pkt_nr; |
|
653 |
if (net->compress) |
|
654 |
{
|
|
655 |
/*
|
|
656 |
If the packet is compressed then complen > 0 and contains the
|
|
657 |
number of bytes in the uncompressed packet
|
|
658 |
*/
|
|
659 |
*complen=uint3korr(&(net->buff[net->where_b + NET_HEADER_SIZE])); |
|
660 |
}
|
|
661 |
||
662 |
len=uint3korr(net->buff+net->where_b); |
|
663 |
if (!len) /* End of big multi-packet */ |
|
664 |
goto end; |
|
665 |
helping = max(len,*complen) + net->where_b; |
|
666 |
/* The necessary size of net->buff */
|
|
667 |
if (helping >= net->max_packet) |
|
668 |
{
|
|
669 |
if (drizzleclient_net_realloc(net,helping)) |
|
670 |
{
|
|
671 |
len= packet_error; /* Return error and close connection */ |
|
672 |
goto end; |
|
673 |
}
|
|
674 |
}
|
|
675 |
pos=net->buff + net->where_b; |
|
676 |
remain = (uint32_t) len; |
|
677 |
}
|
|
678 |
}
|
|
679 |
||
680 |
end: |
|
681 |
net->reading_or_writing= 0; |
|
682 |
||
683 |
return(len); |
|
684 |
}
|
|
685 |
||
686 |
||
687 |
/**
|
|
688 |
Read a packet from the client/server and return it without the internal
|
|
689 |
package header.
|
|
690 |
||
691 |
If the packet is the first packet of a multi-packet packet
|
|
692 |
(which is indicated by the length of the packet = 0xffffff) then
|
|
693 |
all sub packets are read and concatenated.
|
|
694 |
||
695 |
If the packet was compressed, its uncompressed and the length of the
|
|
696 |
uncompressed packet is returned.
|
|
697 |
||
698 |
@return
|
|
699 |
The function returns the length of the found packet or packet_error.
|
|
700 |
net->read_pos points to the read data.
|
|
701 |
*/
|
|
702 |
||
703 |
uint32_t
|
|
704 |
drizzleclient_net_read(NET *net) |
|
705 |
{
|
|
706 |
size_t len, complen; |
|
707 |
||
708 |
if (!net->compress) |
|
709 |
{
|
|
710 |
len = my_real_read(net,&complen); |
|
711 |
if (len == MAX_PACKET_LENGTH) |
|
712 |
{
|
|
713 |
/* First packet of a multi-packet. Concatenate the packets */
|
|
714 |
uint32_t save_pos = net->where_b; |
|
715 |
size_t total_length= 0; |
|
716 |
do
|
|
717 |
{
|
|
718 |
net->where_b += len; |
|
719 |
total_length += len; |
|
720 |
len = my_real_read(net,&complen); |
|
721 |
} while (len == MAX_PACKET_LENGTH); |
|
722 |
if (len != packet_error) |
|
723 |
len+= total_length; |
|
724 |
net->where_b = save_pos; |
|
725 |
}
|
|
726 |
net->read_pos = net->buff + net->where_b; |
|
727 |
if (len != packet_error) |
|
728 |
net->read_pos[len]=0; /* Safeguard for drizzleclient_use_result */ |
|
729 |
return len; |
|
730 |
}
|
|
731 |
else
|
|
732 |
{
|
|
733 |
/* We are using the compressed protocol */
|
|
734 |
||
735 |
uint32_t buf_length; |
|
736 |
uint32_t start_of_packet; |
|
737 |
uint32_t first_packet_offset; |
|
738 |
uint32_t read_length, multi_byte_packet=0; |
|
739 |
||
740 |
if (net->remain_in_buf) |
|
741 |
{
|
|
742 |
buf_length= net->buf_length; /* Data left in old packet */ |
|
743 |
first_packet_offset= start_of_packet= (net->buf_length - |
|
744 |
net->remain_in_buf); |
|
745 |
/* Restore the character that was overwritten by the end 0 */
|
|
746 |
net->buff[start_of_packet]= net->save_char; |
|
747 |
}
|
|
748 |
else
|
|
749 |
{
|
|
750 |
/* reuse buffer, as there is nothing in it that we need */
|
|
751 |
buf_length= start_of_packet= first_packet_offset= 0; |
|
752 |
}
|
|
753 |
for (;;) |
|
754 |
{
|
|
755 |
uint32_t packet_len; |
|
756 |
||
757 |
if (buf_length - start_of_packet >= NET_HEADER_SIZE) |
|
758 |
{
|
|
759 |
read_length = uint3korr(net->buff+start_of_packet); |
|
760 |
if (!read_length) |
|
761 |
{
|
|
762 |
/* End of multi-byte packet */
|
|
763 |
start_of_packet += NET_HEADER_SIZE; |
|
764 |
break; |
|
765 |
}
|
|
766 |
if (read_length + NET_HEADER_SIZE <= buf_length - start_of_packet) |
|
767 |
{
|
|
768 |
if (multi_byte_packet) |
|
769 |
{
|
|
770 |
/* Remove packet header for second packet */
|
|
771 |
memmove(net->buff + first_packet_offset + start_of_packet, |
|
772 |
net->buff + first_packet_offset + start_of_packet + |
|
773 |
NET_HEADER_SIZE, |
|
774 |
buf_length - start_of_packet); |
|
775 |
start_of_packet += read_length; |
|
776 |
buf_length -= NET_HEADER_SIZE; |
|
777 |
}
|
|
778 |
else
|
|
779 |
start_of_packet+= read_length + NET_HEADER_SIZE; |
|
780 |
||
781 |
if (read_length != MAX_PACKET_LENGTH) /* last package */ |
|
782 |
{
|
|
783 |
multi_byte_packet= 0; /* No last zero len packet */ |
|
784 |
break; |
|
785 |
}
|
|
786 |
multi_byte_packet= NET_HEADER_SIZE; |
|
787 |
/* Move data down to read next data packet after current one */
|
|
788 |
if (first_packet_offset) |
|
789 |
{
|
|
790 |
memmove(net->buff,net->buff+first_packet_offset, |
|
791 |
buf_length-first_packet_offset); |
|
792 |
buf_length-=first_packet_offset; |
|
793 |
start_of_packet -= first_packet_offset; |
|
794 |
first_packet_offset=0; |
|
795 |
}
|
|
796 |
continue; |
|
797 |
}
|
|
798 |
}
|
|
799 |
/* Move data down to read next data packet after current one */
|
|
800 |
if (first_packet_offset) |
|
801 |
{
|
|
802 |
memmove(net->buff,net->buff+first_packet_offset, |
|
803 |
buf_length-first_packet_offset); |
|
804 |
buf_length-=first_packet_offset; |
|
805 |
start_of_packet -= first_packet_offset; |
|
806 |
first_packet_offset=0; |
|
807 |
}
|
|
808 |
||
809 |
net->where_b=buf_length; |
|
810 |
if ((packet_len = my_real_read(net,&complen)) == packet_error) |
|
811 |
return packet_error; |
|
812 |
||
813 |
if (complen) |
|
814 |
{
|
|
815 |
unsigned char * compbuf= (unsigned char *) malloc(complen); |
|
816 |
if (compbuf != NULL) |
|
817 |
{
|
|
818 |
uLongf tmp_complen= complen; |
|
819 |
int error= uncompress((Bytef*) compbuf, &tmp_complen, |
|
820 |
(Bytef*) (net->buff + net->where_b), |
|
821 |
(uLong)packet_len); |
|
822 |
complen= tmp_complen; |
|
823 |
||
824 |
if (error != Z_OK) |
|
825 |
{
|
|
826 |
net->error= 2; /* caller will close socket */ |
|
827 |
net->last_errno= CR_NET_UNCOMPRESS_ERROR; |
|
828 |
}
|
|
829 |
else
|
|
830 |
{
|
|
831 |
memcpy((net->buff + net->where_b), compbuf, complen); |
|
832 |
}
|
|
833 |
free(compbuf); |
|
834 |
}
|
|
835 |
}
|
|
836 |
else
|
|
837 |
complen= packet_len; |
|
838 |
||
839 |
}
|
|
840 |
buf_length+= complen; |
|
841 |
||
842 |
net->read_pos= net->buff+ first_packet_offset + NET_HEADER_SIZE; |
|
843 |
net->buf_length= buf_length; |
|
844 |
net->remain_in_buf= (uint32_t) (buf_length - start_of_packet); |
|
845 |
len = ((uint32_t) (start_of_packet - first_packet_offset) - NET_HEADER_SIZE - |
|
846 |
multi_byte_packet); |
|
847 |
net->save_char= net->read_pos[len]; /* Must be saved */ |
|
848 |
net->read_pos[len]=0; /* Safeguard for drizzleclient_use_result */ |
|
849 |
}
|
|
850 |
return len; |
|
851 |
}
|
|
852 |
||
853 |
||
854 |
void drizzleclient_net_set_read_timeout(NET *net, uint32_t timeout) |
|
855 |
{
|
|
856 |
net->read_timeout= timeout; |
|
857 |
#ifndef __sun
|
|
858 |
if (net->vio) |
|
859 |
drizzleclient_vio_timeout(net->vio, 0, timeout); |
|
860 |
#endif
|
|
861 |
return; |
|
862 |
}
|
|
863 |
||
864 |
||
865 |
void drizzleclient_net_set_write_timeout(NET *net, uint32_t timeout) |
|
866 |
{
|
|
867 |
net->write_timeout= timeout; |
|
868 |
#ifndef __sun
|
|
869 |
if (net->vio) |
|
870 |
drizzleclient_vio_timeout(net->vio, 1, timeout); |
|
871 |
#endif
|
|
872 |
return; |
|
873 |
}
|
|
874 |
/**
|
|
875 |
Clear possible error state of struct NET
|
|
876 |
||
877 |
@param net clear the state of the argument
|
|
878 |
*/
|
|
879 |
||
880 |
void drizzleclient_drizzleclient_net_clear_error(NET *net) |
|
881 |
{
|
|
882 |
net->last_errno= 0; |
|
883 |
net->last_error[0]= '\0'; |
|
884 |
strcpy(net->sqlstate, not_error_sqlstate); |
|
885 |
}
|
|
886 |