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

Fix debug assertion in modutil_count_signal_packets

Browse Source 
The original offset needs to be separately tracked to assert that an OK
packet is not the first packet in the buffer. The functional offset into
the buffer is modified to reduce the need to iterate over buffers that
have already been processed.
This commit is contained in:
Markus Mäkelä
2017-10-10 07:25:47 +03:00
committed by Johan Wikman
parent 426f80c8ef
commit 3afc89ae80
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
server/core/modutil.cc
View File

@ -631,6 +631,7 @@ GWBUF* modutil_get_complete_packets(GWBUF **p_readbuf)
int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more_dest, modutil_state* state)
{
unsigned int len = gwbuf_length(reply);
ss_debug(int real_offset = 0);
int eof = 0;
int err = 0;
size_t offset = 0;
@ -669,7 +670,8 @@ int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more_dest, mod
else if (more && command == MYSQL_REPLY_OK)
{
// This should not be the first packet
ss_dassert(pktlen >= MYSQL_OK_PACKET_MIN_LEN && offset > 0);
ss_dassert(pktlen >= MYSQL_OK_PACKET_MIN_LEN);
ss_dassert(real_offset > 0);
uint8_t data[payloadlen - 1];
gwbuf_copy_data(reply, offset + MYSQL_HEADER_LEN + 1, sizeof(data), data);
@ -691,6 +693,8 @@ int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more_dest, mod
}
offset += pktlen;
ss_debug(real_offset += pktlen);
if (offset >= GWBUF_LENGTH(reply) && reply->next)
{
offset -= GWBUF_LENGTH(reply);