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Moved result set processing functions to modutil.c from tee.c.

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This commit is contained in:
Markus Makela 2015-01-13 09:45:58 +02:00
parent e0a460b869
commit d194af0733
3 changed files with 41 additions and 38 deletions
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28
server/core/modutil.c
View File

@ -31,7 +31,7 @@
#include <buffer.h>
#include <string.h>
#include <mysql_client_server_protocol.h>
#include <modutil.h>
/**
* Check if a GWBUF structure is a MySQL COM_QUERY packet
*
@ -493,3 +493,29 @@ GWBUF* modutil_get_next_MySQL_packet(
return_packetbuf:
return packetbuf;
}
/**
* Count the number of EOF packets in the buffer.
* @param reply Buffer to use
* @return Number of EOF packets
*/
int
modutil_count_EOF(GWBUF *reply)
{
unsigned char* ptr = (unsigned char*) reply->start;
unsigned char* end = (unsigned char*) reply->end;
int pktlen,eof = 0;
while(ptr < end)
{
pktlen = gw_mysql_get_byte3(ptr) + 4;
if(PTR_IS_EOF(ptr))
{
eof++;
}
ptr += pktlen;
}
return eof;
}

7
server/include/modutil.h
View File

@ -34,6 +34,12 @@
#include <buffer.h>
#include <dcb.h>
#define PTR_IS_RESULTSET(b) (b[0] == 0x01 && b[1] == 0x0 && b[2] == 0x0 && b[3] == 0x01)
#define PTR_IS_EOF(b) (b[4] == 0xfe)
#define PTR_IS_OK(b) (b[4] == 0x00)
#define PTR_IS_ERR(b) (b[4] == 0xff)
#define PTR_IS_LOCAL_INFILE(b) (b[4] == 0xfb)
extern int modutil_is_SQL(GWBUF *);
extern int modutil_extract_SQL(GWBUF *, char **, int *);
extern int modutil_MySQL_Query(GWBUF *, char **, int *, int *);
@ -52,4 +58,5 @@ GWBUF *modutil_create_mysql_err_msg(
const char *statemsg,
const char *msg);
int modutil_count_EOF(GWBUF*);
#endif

44
server/modules/filter/tee.c
View File

@ -78,9 +78,6 @@
#define PARENT 0
#define CHILD 1
#define PTR_IS_RESULTSET(b) (b[0] == 0x01 && b[1] == 0x0 && b[2] == 0x0 && b[3] == 0x01)
#define PTR_IS_EOF(b) (b[4] == 0xfe)
static unsigned char required_packets[] = {
MYSQL_COM_QUIT,
MYSQL_COM_INITDB,
@ -827,39 +824,6 @@ GWBUF *clone = NULL;
return rval;
}
/**
* Scans the GWBUF for EOF packets. If two packets for this session have been found
* from either the parent or the child branch, mark the response set from that branch as over.
* @param session The Tee filter session
* @param branch Parent or child branch
* @param reply Buffer to scan
*/
void
scan_resultset(TEE_SESSION *session, int branch, GWBUF *reply)
{
unsigned char* ptr = (unsigned char*) reply->start;
unsigned char* end = (unsigned char*) reply->end;
int pktlen = 0;
while(ptr < end)
{
pktlen = gw_mysql_get_byte3(ptr) + 4;
if(PTR_IS_EOF(ptr))
{
session->eof[branch]++;
if(session->eof[branch] == 2)
{
session->waiting[branch] = false;
session->eof[branch] = 0;
return;
}
}
ptr += pktlen;
}
}
/**
* The clientReply entry point. This is passed the response buffer
* to which the filter should be applied. Once processed the
@ -894,7 +858,13 @@ clientReply (FILTER* instance, void *session, GWBUF *reply)
if(my_session->waiting[branch])
{
scan_resultset(my_session,branch,reply);
int eof = modutil_count_EOF(reply);
if((my_session->eof[branch] += eof) >= 2)
{
my_session->eof[branch] = 0;
my_session->waiting[branch] = false;
}
}
if(branch == PARENT)