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fix for missing crc check in blr_slave_fake_rotate()

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fix for missing crc check in blr_slave_fake_rotate()

fix for missing @@version_comment in order to allow mysql client get in
This commit is contained in:
MassimilianoPinto
2015-06-22 18:21:43 +02:00
parent 5bc07c5100
commit 2816d87013
2 changed files with 26 additions and 12 deletions
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35
server/modules/routing/binlog/blr_slave.c
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@ -271,7 +271,11 @@ int query_len;
else if (strcasecmp(word, "@@version_comment") == 0)
{
free(query_text);
return blr_slave_replay(router, slave, router->saved_master.selectvercom);
if (!router->saved_master.selectvercom)
/* This will allow mysql client to get in when @@version_comment is not available */
return blr_slave_send_ok(router, slave);
else
return blr_slave_replay(router, slave, router->saved_master.selectvercom);
}
else if (strcasecmp(word, "@@hostname") == 0)
{
@ -1800,6 +1804,10 @@ uint32_t chksum;
binlognamelen = strlen(slave->binlogfile);
len = 19 + 8 + 4 + binlognamelen;
/* no slave crc, remove 4 bytes */
if (slave->nocrc)
len -= 4;
// Build a fake rotate event
resp = gwbuf_alloc(len + 5);
hdr.payload_len = len + 1;
@ -1817,17 +1825,20 @@ uint32_t chksum;
memcpy(ptr, slave->binlogfile, binlognamelen);
ptr += binlognamelen;
/*
* Now add the CRC to the fake binlog rotate event.
*
* The algorithm is first to compute the checksum of an empty buffer
* and then the checksum of the event portion of the message, ie we do not
* include the length, sequence number and ok byte that makes up the first
* 5 bytes of the message. We also do not include the 4 byte checksum itself.
*/
chksum = crc32(0L, NULL, 0);
chksum = crc32(chksum, GWBUF_DATA(resp) + 5, hdr.event_size - 4);
encode_value(ptr, chksum, 32);
/* if slave has crc add the chksum */
if (!slave->nocrc) {
/*
* Now add the CRC to the fake binlog rotate event.
*
* The algorithm is first to compute the checksum of an empty buffer
* and then the checksum of the event portion of the message, ie we do not
* include the length, sequence number and ok byte that makes up the first
* 5 bytes of the message. We also do not include the 4 byte checksum itself.
*/
chksum = crc32(0L, NULL, 0);
chksum = crc32(chksum, GWBUF_DATA(resp) + 5, hdr.event_size - 4);
encode_value(ptr, chksum, 32);
}
slave->dcb->func.write(slave->dcb, resp);
return 1;