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This commit is contained in:
Chuck Bell 2011-09-07 13:05:25 -04:00
commit a2dd614820
1 changed files with 6 additions and 17 deletions
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23
sql/sql_acl.cc
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@ -8820,24 +8820,18 @@ static ulong parse_client_handshake_packet(MPVIO_EXT *mpvio,
/**
Make sure that when sending plugin supplued data to the client they
Make sure that when sending plugin supplied data to the client they
are not considered a special out-of-band command, like e.g.
\255 (error) or \254 (change user request packet).
To avoid this we send plugin data packets starting with one of these
2 bytes "wrapped" in a command \1.
For the above reason we have to wrap plugin data packets starting with
\1 as well.
\255 (error) or \254 (change user request packet) or \0 (OK).
To avoid this the server will send all plugin data packets "wrapped"
in a command \1.
Note that the client will continue sending its replies unrwapped.
*/
#define IS_OUT_OF_BAND_PACKET(packet,packet_len) \
((packet_len) > 0 && \
(*(packet) == 1 || *(packet) == 255 || *(packet) == 254))
static inline int
wrap_plguin_data_into_proper_command(NET *net,
const uchar *packet, int packet_len)
{
DBUG_ASSERT(IS_OUT_OF_BAND_PACKET(packet, packet_len));
return net_write_command(net, 1, (uchar *) "", 0, packet, packet_len);
}
@ -8874,13 +8868,8 @@ static int server_mpvio_write_packet(MYSQL_PLUGIN_VIO *param,
res= send_server_handshake_packet(mpvio, (char*) packet, packet_len);
else if (mpvio->status == MPVIO_EXT::RESTART)
res= send_plugin_request_packet(mpvio, packet, packet_len);
else if (IS_OUT_OF_BAND_PACKET(packet, packet_len))
res= wrap_plguin_data_into_proper_command(mpvio->net, packet, packet_len);
else
{
res= my_net_write(mpvio->net, packet, packet_len) ||
net_flush(mpvio->net);
}
res= wrap_plguin_data_into_proper_command(mpvio->net, packet, packet_len);
mpvio->packets_written++;
DBUG_RETURN(res);
}