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https://github.com/MariaDB/server.git
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Manual merge.
This commit is contained in:
joerg@mysql.com
parent
792d401981
commit
ab271b4d84
107
sql/net_serv.cc
107
sql/net_serv.cc
@ -14,6 +14,13 @@
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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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/*
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This file is the net layer API for the MySQL client/server protocol,
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which is a tightly coupled, proprietary protocol owned by MySQL AB.
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Any re-implementations of this protocol must also be under GPL
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unless one has got an license from MySQL AB stating otherwise.
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*/
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/*
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Write and read of logical packets to/from socket
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@ -26,6 +33,10 @@
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C file.
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*/
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/*
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HFTODO this must be hidden if we don't want client capabilities in
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embedded library
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*/
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#ifdef __WIN__
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#include <winsock.h>
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#endif
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@ -41,6 +52,13 @@
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#include <signal.h>
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#include <errno.h>
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#ifdef EMBEDDED_LIBRARY
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#undef MYSQL_SERVER
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#undef MYSQL_CLIENT
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#define MYSQL_CLIENT
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#endif /*EMBEDDED_LIBRARY */
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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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@ -66,10 +84,15 @@ void sql_print_error(const char *format,...);
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#ifdef MYSQL_SERVER
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#define USE_QUERY_CACHE
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/*
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The following variables/functions should really not be declared
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extern, but as it's hard to include mysql_priv.h here, we have to
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live with this for a while.
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*/
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extern uint test_flags;
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extern void query_cache_insert(NET *net, const char *packet, ulong length);
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extern ulong bytes_sent, bytes_received, net_big_packet_count;
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extern pthread_mutex_t LOCK_bytes_sent , LOCK_bytes_received;
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extern void query_cache_insert(NET *net, const char *packet, ulong length);
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#else
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#undef statistic_add
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#undef statistic_increment
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@ -85,7 +108,7 @@ static my_bool net_write_buff(NET *net,const char *packet,ulong len);
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/* Init with packet info */
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int my_net_init(NET *net, Vio* vio)
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my_bool my_net_init(NET *net, Vio* vio)
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{
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DBUG_ENTER("my_net_init");
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my_net_local_init(net); /* Set some limits */
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@ -104,6 +127,7 @@ int my_net_init(NET *net, Vio* vio)
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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->query_cache_query=0;
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net->report_error= 0;
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if (vio != 0) /* If real connection */
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{
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@ -132,7 +156,7 @@ void net_end(NET *net)
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/* Realloc the packet buffer */
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static my_bool net_realloc(NET *net, ulong length)
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my_bool net_realloc(NET *net, ulong length)
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{
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uchar *buff;
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ulong pkt_length;
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@ -141,9 +165,10 @@ static my_bool net_realloc(NET *net, ulong length)
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if (length >= net->max_packet_size)
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{
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DBUG_PRINT("error",("Packet too large. Max sixe: %lu",
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DBUG_PRINT("error", ("Packet too large. Max size: %lu",
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net->max_packet_size));
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net->error= 1;
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net->report_error= 1;
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net->last_errno= ER_NET_PACKET_TOO_LARGE;
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DBUG_RETURN(1);
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}
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@ -157,9 +182,8 @@ static my_bool net_realloc(NET *net, ulong length)
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MYF(MY_WME))))
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{
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net->error= 1;
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#ifdef MYSQL_SERVER
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net->report_error= 1;
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net->last_errno= ER_OUT_OF_RESOURCES;
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#endif
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DBUG_RETURN(1);
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}
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net->buff=net->write_pos=buff;
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@ -193,14 +217,14 @@ void net_clear(NET *net)
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/* Flush write_buffer if not empty. */
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int net_flush(NET *net)
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my_bool net_flush(NET *net)
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{
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int error=0;
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my_bool error= 0;
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DBUG_ENTER("net_flush");
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if (net->buff != net->write_pos)
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{
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error=net_real_write(net,(char*) net->buff,
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(ulong) (net->write_pos - net->buff));
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error=test(net_real_write(net,(char*) net->buff,
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(ulong) (net->write_pos - net->buff)));
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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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@ -223,7 +247,7 @@ int net_flush(NET *net)
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If compression is used the original package is modified!
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*/
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int
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my_bool
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my_net_write(NET *net,const char *packet,ulong len)
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{
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uchar buff[NET_HEADER_SIZE];
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@ -250,23 +274,46 @@ my_net_write(NET *net,const char *packet,ulong len)
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buff[3]= (uchar) net->pkt_nr++;
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if (net_write_buff(net,(char*) buff,NET_HEADER_SIZE))
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return 1;
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#ifndef DEBUG_DATA_PACKETS
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DBUG_DUMP("packet_header",(char*) buff,NET_HEADER_SIZE);
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#endif
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return test(net_write_buff(net,packet,len));
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}
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/*
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Send a command to the server.
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SYNOPSIS
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net_write_command()
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net NET handler
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command Command in MySQL server (enum enum_server_command)
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header Header to write after command
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head_len Length of header
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packet Query or parameter to query
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len Length of packet
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DESCRIPTION
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The reason for having both header and packet is so that libmysql
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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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RETURN VALUES
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0 ok
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1 error
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*/
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int
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net_write_command(NET *net,uchar command,const char *packet,ulong len)
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my_bool
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net_write_command(NET *net,uchar command,
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const char *header, ulong head_len,
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const char *packet, ulong len)
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{
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ulong length=len+1; /* 1 extra byte for command */
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ulong 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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DBUG_ENTER("net_write_command");
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@ -277,17 +324,19 @@ net_write_command(NET *net,uchar command,const char *packet,ulong len)
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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;
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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]= (uchar) net->pkt_nr++;
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if (net_write_buff(net,(char*) 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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DBUG_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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@ -295,6 +344,7 @@ net_write_command(NET *net,uchar command,const char *packet,ulong len)
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int3store(buff,length);
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buff[3]= (uchar) net->pkt_nr++;
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DBUG_RETURN(test(net_write_buff(net, (char*) buff, header_size) ||
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(head_len && net_write_buff(net, (char*) header, head_len)) ||
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net_write_buff(net, packet, len) || net_flush(net)));
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}
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@ -336,6 +386,9 @@ net_write_buff(NET *net,const char *packet,ulong len)
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else
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left_length= (ulong) (net->buff_end - net->write_pos);
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#ifdef DEBUG_DATA_PACKETS
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DBUG_DUMP("data", packet, len);
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#endif
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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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@ -413,6 +466,8 @@ net_real_write(NET *net,const char *packet,ulong len)
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#ifdef MYSQL_SERVER
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net->last_errno= ER_OUT_OF_RESOURCES;
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net->error= 2;
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/* TODO is it needed to set this variable if we have no socket */
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net->report_error= 1;
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#endif
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net->reading_or_writing= 0;
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DBUG_RETURN(1);
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@ -464,6 +519,7 @@ net_real_write(NET *net,const char *packet,ulong len)
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net->last_errno= ER_NET_ERROR_ON_WRITE;
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#endif
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net->error= 2; /* Close socket */
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net->report_error= 1;
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goto end;
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}
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retry_count=0;
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@ -490,6 +546,7 @@ net_real_write(NET *net,const char *packet,ulong len)
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}
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#endif /* defined(THREAD_SAFE_CLIENT) && !defined(MYSQL_SERVER) */
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net->error= 2; /* Close socket */
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net->report_error= 1;
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#ifdef MYSQL_SERVER
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net->last_errno= (interrupted ? ER_NET_WRITE_INTERRUPTED :
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ER_NET_ERROR_ON_WRITE);
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@ -668,6 +725,7 @@ my_real_read(NET *net, ulong *complen)
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#endif /* EXTRA_DEBUG */
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len= packet_error;
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net->error= 2; /* Close socket */
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net->report_error= 1;
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#ifdef MYSQL_SERVER
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net->last_errno= ER_NET_FCNTL_ERROR;
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#endif
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@ -699,6 +757,7 @@ my_real_read(NET *net, ulong *complen)
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remain, vio_errno(net->vio), length));
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len= packet_error;
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net->error= 2; /* Close socket */
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net->report_error= 1;
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#ifdef MYSQL_SERVER
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net->last_errno= (interrupted ? ER_NET_READ_INTERRUPTED :
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ER_NET_READ_ERROR);
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@ -712,6 +771,8 @@ my_real_read(NET *net, ulong *complen)
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if (i == 0)
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{ /* First parts is packet length */
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ulong helping;
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DBUG_DUMP("packet_header",(char*) net->buff+net->where_b,
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NET_HEADER_SIZE);
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if (net->buff[net->where_b + 3] != (uchar) net->pkt_nr)
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{
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if (net->buff[net->where_b] != (uchar) 255)
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@ -720,7 +781,6 @@ my_real_read(NET *net, ulong *complen)
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("Packets out of order (Found: %d, expected %u)",
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(int) net->buff[net->where_b + 3],
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net->pkt_nr));
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DBUG_DUMP("packet_header",(char*) net->buff+net->where_b, 4);
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#ifdef EXTRA_DEBUG
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fprintf(stderr,"Packets out of order (Found: %d, expected %d)\n",
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(int) net->buff[net->where_b + 3],
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@ -728,6 +788,7 @@ my_real_read(NET *net, ulong *complen)
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#endif
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}
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len= packet_error;
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net->report_error= 1;
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#ifdef MYSQL_SERVER
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net->last_errno=ER_NET_PACKETS_OUT_OF_ORDER;
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#endif
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@ -776,6 +837,10 @@ end:
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vio_blocking(net->vio, net_blocking, &old_mode);
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}
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net->reading_or_writing=0;
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#ifdef DEBUG_DATA_PACKETS
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if (len != packet_error)
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DBUG_DUMP("data",(char*) net->buff+net->where_b, len);
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#endif
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return(len);
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}
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@ -909,6 +974,7 @@ my_net_read(NET *net)
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&complen))
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{
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net->error= 2; /* caller will close socket */
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net->report_error= 1;
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#ifdef MYSQL_SERVER
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net->last_errno=ER_NET_UNCOMPRESS_ERROR;
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#endif
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@ -929,12 +995,3 @@ my_net_read(NET *net)
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return len;
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}
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bool net_request_file(NET* net, const char* fname)
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{
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char tmp [FN_REFLEN+1],*end;
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DBUG_ENTER("net_request_file");
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tmp[0] = (char) 251; /* NULL_LENGTH */
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end=strnmov(tmp+1,fname,sizeof(tmp)-2);
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DBUG_RETURN(my_net_write(net,tmp,(uint) (end-tmp)) ||
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net_flush(net));
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}
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