hcq/MaxScale
hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add more packet splitting debug assertions

Browse Source 
Having more debug assertions in functions that split packets guarantees
that they work as expected.
This commit is contained in:
Markus Mäkelä 2018-07-20 11:16:39 +03:00
parent d68f20b75b
commit bbe4f42935
No known key found for this signature in database
GPG Key ID: 72D48FCE664F7B19
3 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
server/core/buffer.cc
View File

@ -795,6 +795,7 @@ gwbuf_make_contiguous(GWBUF *orig)
if (orig == NULL)
{
ss_info_dassert(!true, "gwbuf_make_contiguous: NULL buffer");
return NULL;
}
if (orig->next == NULL)

12
server/core/modutil.cc
View File

@ -485,6 +485,17 @@ int modutil_send_mysql_err_packet(DCB *dcb,
return dcb->func.write(dcb, buf);
}
// Helper function for debug assertions
static bool only_one_packet(GWBUF* buffer)
{
ss_dassert(buffer);
uint8_t header[4] = {};
gwbuf_copy_data(buffer, 0, MYSQL_HEADER_LEN, header);
size_t packet_len = gw_mysql_get_byte3(header);
size_t buffer_len = gwbuf_length(buffer);
return packet_len + MYSQL_HEADER_LEN == buffer_len;
}
/**
* Return the first packet from a buffer.
*
@ -531,6 +542,7 @@ GWBUF* modutil_get_next_MySQL_packet(GWBUF** p_readbuf)
}
}
ss_dassert(!packet || only_one_packet(packet));
return packet;
}

12
server/modules/protocol/MySQL/mariadbclient/mysql_client.cc
View File

@ -1576,17 +1576,6 @@ static bool reauthenticate_client(MXS_SESSION* session, GWBUF* packetbuf)
return rval;
}
// Helper function for debug assertions
static bool only_one_packet(GWBUF* buffer)
{
ss_dassert(buffer);
uint8_t header[4] = {};
gwbuf_copy_data(buffer, 0, MYSQL_HEADER_LEN, header);
size_t packet_len = gw_mysql_get_byte3(header);
size_t buffer_len = gwbuf_length(buffer);
return packet_len + MYSQL_HEADER_LEN == buffer_len;
}
/**
* Detect if buffer includes partial mysql packet or multiple packets.
* Store partial packet to dcb_readqueue. Send complete packets one by one
@ -1616,7 +1605,6 @@ static int route_by_statement(MXS_SESSION* session, uint64_t capabilities, GWBUF
if (packetbuf != NULL)
{
ss_dassert(only_one_packet(packetbuf));
CHK_GWBUF(packetbuf);
MySQLProtocol* proto = (MySQLProtocol*)session->client_dcb->protocol;