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MXS-1048: Handle backquoted database names

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The schemarouter didn't expect backquoted database names for SHOW TABLE
and USE statements.
This commit is contained in:
Markus Makela
2016-12-13 13:51:46 +02:00
parent ea81990542
commit 3872cebd09
2 changed files with 29 additions and 24 deletions
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5
server/modules/routing/schemarouter/schemarouter.c
View File

@ -531,8 +531,9 @@ char* get_shard_target_name(ROUTER_INSTANCE* router,
query = modutil_get_SQL(buffer);
if ((tmp = strcasestr(query, "from")))
{
char *saved, *tok = strtok_r(tmp, " ;", &saved);
tok = strtok_r(NULL, " ;", &saved);
const char *delim = "` \n\t;";
char *saved, *tok = strtok_r(tmp, delim, &saved);
tok = strtok_r(NULL, delim, &saved);
ss_dassert(tok != NULL);
tmp = (char*) hashtable_fetch(ht, tok);

48
server/modules/routing/schemarouter/sharding_common.c
View File

@ -22,8 +22,8 @@
*/
bool extract_database(GWBUF* buf, char* str)
{
uint8_t* packet;
char *saved,*tok,*query = NULL;
uint8_t* packet;
char *saved, *tok, *query = NULL;
bool succp = true;
unsigned int plen;
@ -31,33 +31,37 @@ bool extract_database(GWBUF* buf, char* str)
plen = gw_mysql_get_byte3(packet) - 1;
/** Copy database name from MySQL packet to session */
if(qc_get_operation(buf) == QUERY_OP_CHANGE_DB)
if (qc_get_operation(buf) == QUERY_OP_CHANGE_DB)
{
query = modutil_get_SQL(buf);
tok = strtok_r(query," ;",&saved);
if(tok == NULL || strcasecmp(tok,"use") != 0)
{
MXS_ERROR("extract_database: Malformed chage database packet.");
succp = false;
goto retblock;
}
const char *delim = "` \n\t;";
tok = strtok_r(NULL," ;",&saved);
if(tok == NULL)
{
MXS_ERROR("extract_database: Malformed chage database packet.");
succp = false;
goto retblock;
}
query = modutil_get_SQL(buf);
tok = strtok_r(query, delim, &saved);
strncpy(str,tok,MYSQL_DATABASE_MAXLEN);
if (tok == NULL || strcasecmp(tok, "use") != 0)
{
MXS_ERROR("extract_database: Malformed chage database packet.");
succp = false;
goto retblock;
}
tok = strtok_r(NULL, delim, &saved);
if (tok == NULL)
{
MXS_ERROR("extract_database: Malformed change database packet.");
succp = false;
goto retblock;
}
strncpy(str, tok, MYSQL_DATABASE_MAXLEN);
}
else
{
memcpy(str,packet + 5,plen);
memset(str + plen,0,1);
memcpy(str, packet + 5, plen);
memset(str + plen, 0, 1);
}
retblock:
retblock:
free(query);
return succp;
}