static int
routeQuery(ROUTER *instance, void *session, GWBUF *queue)
{
WEB_SESSION *wsession = (WEB_SESSION *)session;
char *ptr;
int i, found = 0;
char *url;
if ((url = gwbuf_get_property(queue, "URL")) == NULL)
{
respond_error(wsession, 404, "No URL available");
}
ptr = strrchr(url, '/');
if (ptr)
ptr++;
else
ptr = url;
for (i = 0; pages[i].page; i++)
{
if (!strcmp(ptr, pages[i].page))
{
(pages[i].fcn)(wsession);
found = 1;
}
}
if (!found)
respond_error(wsession, 404, "Unrecognised URL received");
gwbuf_free(queue);
return 0;
}
int
test2()
{
GWBUF *buffer;
char len = 128;
char query[129];
buffer = gwbuf_alloc(132);
ss_info_dassert((buffer != NULL),"Buffer should not be null");
memset(query,';',128);
memset(query+128,'\0',1);
*((unsigned char*)buffer->start) = len;
*((unsigned char*)buffer->start+1) = 0;
*((unsigned char*)buffer->start+2) = 0;
*((unsigned char*)buffer->start+3) = 1;
*((unsigned char*)buffer->start+4) = 0x03;
memcpy(buffer->start + 5,query,strlen(query));
char* result = modutil_get_SQL(buffer);
ss_dassert(strcmp(result,query) == 0);
gwbuf_free(buffer);
free(result);
ss_dfprintf(stderr, "\t..done\n");
return 0;
}
static int
test1()
{
GWBUF *buffer;
char *(sql[100]);
int result, length, residual;
/* Poll tests */
ss_dfprintf(stderr,
"testmodutil : Rudimentary tests.");
buffer = gwbuf_alloc(100);
ss_info_dassert(0 == modutil_is_SQL(buffer), "Default buffer should be diagnosed as not SQL");
/* There would ideally be some straightforward way to create a SQL buffer? */
ss_dfprintf(stderr, "\t..done\nExtract SQL from buffer");
ss_info_dassert(0 == modutil_extract_SQL(buffer, sql, &length), "Default buffer should fail");
ss_dfprintf(stderr, "\t..done\nExtract SQL from buffer different way?");
ss_info_dassert(0 == modutil_MySQL_Query(buffer, sql, &length, &residual), "Default buffer should fail");
ss_dfprintf(stderr, "\t..done\nReplace SQL in buffer");
ss_info_dassert(0 == modutil_replace_SQL(buffer, "select * from some_table;"), "Default buffer should fail");
ss_dfprintf(stderr, "\t..done\nTidy up.");
gwbuf_free(buffer);
ss_dfprintf(stderr, "\t..done\n");
return 0;
}
/**
* The routeQuery entry point. This is passed the query buffer
* to which the filter should be applied. Once applied the
* query should normally be passed to the downstream component
* (filter or router) in the filter chain.
*
* If my_session->residual is set then duplicate that many bytes
* and send them to the branch.
*
* If my_session->residual is zero then this must be a new request
* Extract the SQL text if possible, match against that text and forward
* the request. If the requets is not contained witin the packet we have
* then set my_session->residual to the number of outstanding bytes
*
* @param instance The filter instance data
* @param session The filter session
* @param queue The query data
*/
static int
routeQuery(FILTER *instance, void *session, GWBUF *queue)
{
TEE_INSTANCE *my_instance = (TEE_INSTANCE *)instance;
TEE_SESSION *my_session = (TEE_SESSION *)session;
char *ptr;
int rval;
GWBUF *buffer = NULL, *clone = NULL;
unsigned char command = gwbuf_length(queue) >= 5 ?
*((unsigned char*)queue->start + 4) : 1;
#ifdef SS_DEBUG
skygw_log_write(LOGFILE_TRACE,"Tee routeQuery: %d : %s",
atomic_add(&debug_seq,1),
((char*)queue->start + 5));
#endif
spinlock_acquire(&my_session->tee_lock);
if(!my_session->active)
{
skygw_log_write(LOGFILE_TRACE, "Tee: Received a reply when the session was closed.");
gwbuf_free(queue);
spinlock_release(&my_session->tee_lock);
return 0;
}
if(my_session->queue)
{
my_session->queue = gwbuf_append(my_session->queue,queue);
buffer = modutil_get_next_MySQL_packet(&my_session->queue);
}
else
{
buffer = modutil_get_next_MySQL_packet(&queue);
my_session->queue = queue;
}
if(buffer == NULL)
{
spinlock_release(&my_session->tee_lock);
return 1;
}
clone = clone_query(my_instance, my_session,buffer);
spinlock_release(&my_session->tee_lock);
/* Reset session state */
if(!reset_session_state(my_session,buffer))
return 0;
/** Route query downstream */
spinlock_acquire(&my_session->tee_lock);
rval = route_single_query(my_instance,my_session,buffer,clone);
spinlock_release(&my_session->tee_lock);
return rval;
}
/**
* Free the memory associated with the session
*
* @param instance The filter instance
* @param session The filter session
*/
static void
freeSession(FILTER *instance, void *session)
{
TEE_SESSION *my_session = (TEE_SESSION *)session;
SESSION* ses = my_session->branch_session;
session_state_t state;
#ifdef SS_DEBUG
skygw_log_write(LOGFILE_TRACE,"Tee free: %d", atomic_add(&debug_seq,1));
#endif
if (ses != NULL)
{
state = ses->state;
if (state == SESSION_STATE_ROUTER_READY)
{
session_free(ses);
}
else if (state == SESSION_STATE_TO_BE_FREED)
{
/** Free branch router session */
ses->service->router->freeSession(
ses->service->router_instance,
ses->router_session);
/** Free memory of branch client session */
ses->state = SESSION_STATE_FREE;
free(ses);
/** This indicates that branch session is not available anymore */
my_session->branch_session = NULL;
}
else if(state == SESSION_STATE_STOPPING)
{
orphan_session_t* orphan;
if((orphan = malloc(sizeof(orphan_session_t))) == NULL)
{
skygw_log_write(LOGFILE_ERROR,"Error : Failed to "
"allocate memory for orphan session struct, "
"child session might leak memory.");
}else{
orphan->session = ses;
spinlock_acquire(&orphanLock);
orphan->next = allOrphans;
allOrphans = orphan;
spinlock_release(&orphanLock);
}
}
}
if (my_session->dummy_filterdef)
{
filter_free(my_session->dummy_filterdef);
}
if(my_session->tee_replybuf)
gwbuf_free(my_session->tee_replybuf);
free(session);
orphan_free(NULL);
return;
}
/**
* Trim bytes from the end of a GWBUF structure that may be the first
* in a list. If the buffer has n_bytes or less then it will be freed and
* the next buffer in the list will be returned, or if none, NULL.
*
* @param head The buffer to trim
* @param n_bytes The number of bytes to trim off
* @return The buffer chain or NULL if buffer chain now empty
*/
GWBUF *
gwbuf_rtrim(GWBUF *head, unsigned int n_bytes)
{
GWBUF *rval = head;
CHK_GWBUF(head);
GWBUF_RTRIM(head, n_bytes);
CHK_GWBUF(head);
if (GWBUF_EMPTY(head))
{
rval = head->next;
gwbuf_free(head);
}
return rval;
}
/**
* Consume data from a buffer in the linked list. The assumption is to consume
* n bytes from the buffer chain.
*
* If after consuming the bytes from the first buffer that buffer becomes
* empty it will be freed and the linked list updated.
*
* The return value is the new head of the linked list.
*
* This call should be made with the caller holding the lock for the linked
* list.
*
* @param head The head of the linked list
* @param length The amount of data to consume
* @return The head of the linked list
*/
GWBUF *
gwbuf_consume(GWBUF *head, unsigned int length)
{
GWBUF *rval = head;
CHK_GWBUF(head);
GWBUF_CONSUME(head, length);
CHK_GWBUF(head);
if (GWBUF_EMPTY(head))
{
rval = head->next;
gwbuf_free(head);
}
return rval;
}
/**
* Free the memory associated with the session
*
* @param instance The filter instance
* @param session The filter session
*/
static void
freeSession(FILTER *instance, void *session)
{
TEE_SESSION *my_session = (TEE_SESSION *) session;
SESSION* ses = my_session->branch_session;
session_state_t state;
#ifdef SS_DEBUG
MXS_INFO("Tee free: %d", atomic_add(&debug_seq, 1));
#endif
if (ses != NULL)
{
state = ses->state;
if (state == SESSION_STATE_ROUTER_READY)
{
session_free(ses);
}
else if (state == SESSION_STATE_TO_BE_FREED)
{
/** Free branch router session */
ses->service->router->freeSession(
ses->service->router_instance,
ses->router_session);
/** Free memory of branch client session */
ses->state = SESSION_STATE_FREE;
free(ses);
/** This indicates that branch session is not available anymore */
my_session->branch_session = NULL;
}
else if (state == SESSION_STATE_STOPPING)
{
create_orphan(ses);
}
}
if (my_session->dummy_filterdef)
{
filter_free(my_session->dummy_filterdef);
}
if (my_session->tee_replybuf)
{
gwbuf_free(my_session->tee_replybuf);
}
free(session);
orphan_free(NULL);
return;
}
/**
* Route the main query downstream along the main filter chain and possibly route
* a clone of the buffer to the branch session. If the clone buffer is NULL, nothing
* is routed to the branch session.
* @param my_instance Tee instance
* @param my_session Tee session
* @param buffer Main buffer
* @param clone Cloned buffer
* @return 1 on success, 0 on failure.
*/
int route_single_query(TEE_INSTANCE* my_instance, TEE_SESSION* my_session, GWBUF* buffer, GWBUF* clone)
{
int rval = 0;
if(!my_session->active ||
my_session->branch_session == NULL ||
my_session->branch_session->state != SESSION_STATE_ROUTER_READY)
{
rval = 0;
my_session->active = 0;
return rval;
}
rval = my_session->down.routeQuery(my_session->down.instance,
my_session->down.session,
buffer);
if (clone)
{
my_session->n_duped++;
if (my_session->branch_session->state == SESSION_STATE_ROUTER_READY)
{
SESSION_ROUTE_QUERY(my_session->branch_session, clone);
}
else
{
/** Close tee session */
my_session->active = 0;
rval = 0;
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Closed tee filter session: Child session in invalid state.")));
gwbuf_free(clone);
}
}
else
{
if (my_session->active)
{
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Closed tee filter session: Child session is NULL.")));
my_session->active = 0;
rval = 0;
}
my_session->n_rejected++;
}
return rval;
}
int main(int argc, char** argv)
{
unsigned int psize;
GWBUF* qbuff;
char *tok;
char readbuff[4092];
FILE* infile;
FILE* outfile;
if(argc != 3){
printf("Usage: canonizer <input file> <output file>\n");
return 1;
}
if(mysql_library_init(num_elements, server_options, server_groups)){
printf("Embedded server init failed.\n");
return 1;
}
infile = fopen(argv[1],"rb");
outfile = fopen(argv[2],"wb");
if(infile == NULL || outfile == NULL){
printf("Opening files failed.\n");
return 1;
}
while(!feof(infile))
{
fgets(readbuff,4092,infile);
psize = strlen(readbuff);
if(psize < 4092){
qbuff = gwbuf_alloc(psize + 7);
*(qbuff->sbuf->data + 0) = (unsigned char)psize;
*(qbuff->sbuf->data + 1) = (unsigned char)(psize>>8);
*(qbuff->sbuf->data + 2) = (unsigned char)(psize>>16);
*(qbuff->sbuf->data + 4) = 0x03;
memcpy(qbuff->start + 5,readbuff,psize + 1);
parse_query(qbuff);
tok = skygw_get_canonical(qbuff);
fprintf(outfile,"%s\n",tok);
free(tok);
gwbuf_free(qbuff);
}
}
/**
* Route the main query downstream along the main filter chain and possibly route
* a clone of the buffer to the branch session. If the clone buffer is NULL, nothing
* is routed to the branch session.
* @param my_instance Tee instance
* @param my_session Tee session
* @param buffer Main buffer
* @param clone Cloned buffer
* @return 1 on success, 0 on failure.
*/
int route_single_query(TEE_INSTANCE* my_instance, TEE_SESSION* my_session, GWBUF* buffer, GWBUF* clone)
{
int rval = 0;
if (!my_session->active ||
my_session->branch_session == NULL ||
my_session->branch_session->state != SESSION_STATE_ROUTER_READY)
{
rval = 0;
my_session->active = 0;
return rval;
}
if (clone == NULL)
{
/** We won't be expecting any response from the child branch */
my_session->waiting[CHILD] = false;
my_session->multipacket[CHILD] = false;
my_session->eof[CHILD] = 2;
my_session->n_rejected++;
}
rval = my_session->down.routeQuery(my_session->down.instance,
my_session->down.session,
buffer);
if (clone)
{
my_session->n_duped++;
if (my_session->branch_session->state == SESSION_STATE_ROUTER_READY)
{
SESSION_ROUTE_QUERY(my_session->branch_session, clone);
}
else
{
/** Close tee session */
my_session->active = 0;
rval = 0;
MXS_INFO("Closed tee filter session: Child session in invalid state.");
gwbuf_free(clone);
}
}
return rval;
}
void free_buffers()
{
if(instance.buffer){
int i;
for(i = 0;i<instance.buffer_count;i++){
gwbuf_free(instance.buffer[i]);
}
free(instance.buffer);
instance.buffer = NULL;
instance.buffer_count = 0;
}
if(instance.infile >= 0){
close(instance.infile);
free(instance.infile_name);
instance.infile = -1;
}
}
/**
* We have data from the client, this is a HTTP URL
*
* @param instance The router instance
* @param session The router session returned from the newSession call
* @param queue The queue of data buffers to route
* @return The number of bytes sent
*/
static int
handle_url(INFO_INSTANCE *instance, INFO_SESSION *session, GWBUF *queue)
{
char *uri;
int i;
RESULTSET *set;
uri = (char *)GWBUF_DATA(queue);
for (i = 0; supported_uri[i].uri; i++)
{
if (strcmp(uri, supported_uri[i].uri) == 0)
{
set = (*supported_uri[i].func)();
resultset_stream_json(set, session->dcb);
resultset_free(set);
}
}
gwbuf_free(queue);
return 1;
}
/**
* Consume data from a buffer in the linked list. The assumption is to consume
* n bytes from the buffer chain.
*
* If after consuming the bytes from the first buffer that buffer becomes
* empty it will be freed and the linked list updated.
*
* The return value is the new head of the linked list.
*
* This call should be made with the caller holding the lock for the linked
* list.
*
* @param head The head of the linked list
* @param length The amount of data to consume
* @return The head of the linked list
*/
GWBUF *
gwbuf_consume(GWBUF *head, unsigned int length)
{
GWBUF *rval = head;
CHK_GWBUF(head);
GWBUF_CONSUME(head, length);
CHK_GWBUF(head);
if (GWBUF_EMPTY(head))
{
rval = head->next;
if (head->next)
head->next->tail = head->tail;
gwbuf_free(head);
}
ss_dassert(rval == NULL || (rval->end > rval->start));
return rval;
}
void work_buffer(void* thr_num)
{
unsigned int index = instance.session_count;
GWBUF* fake_ok = gen_packet(PACKET_OK);
while(instance.running){
pthread_mutex_lock(&instance.work_mtx);
pthread_mutex_unlock(&instance.work_mtx);
index = atomic_add(&instance.sess_ind,1);
if(instance.running &&
index < instance.session_count &&
instance.buff_ind < instance.buffer_count)
{
struct timespec ts1;
ts1.tv_sec = 0;
if(instance.head->instance->routeQuery(instance.head->filter,
instance.head->session[index],
instance.buffer[instance.buff_ind]) == 0){
if(instance.outfile > 0){
const char* msg = "Query returned 0.\n";
write(instance.outfile,msg,strlen(msg));
}
}
if(instance.tail->instance->clientReply){
instance.tail->instance->clientReply(instance.tail->filter,
instance.tail->session[index],
fake_ok);
}
atomic_add(&instance.last_ind,1);
ts1.tv_nsec = 1000*instance.rt_delay*1000000;
nanosleep(&ts1, NULL);
}
}
gwbuf_free(fake_ok);
}
int main(int argc, char** argv)
{
if(argc < 3){
fprintf(stderr,"Usage: classify <input> <expected output>");
return 1;
}
int rd = 0,buffsz = getpagesize(),strsz = 0,ex_val = 0;
char buffer[1024], *strbuff = (char*)calloc(buffsz,sizeof(char));
FILE *input,*expected;
if(mysql_library_init(num_elements, server_options, server_groups))
{
printf("Error: Cannot initialize Embedded Library.");
return 1;
}
input = fopen(argv[1],"rb");
if(input == NULL)
{
printf("Error: Failed to open input file %s", argv[1]);
return 1;
}
expected = fopen(argv[2],"rb");
if(expected == NULL)
{
fclose(input);
printf("Error: Failed to open expected output file %s", argv[2]);
return 1;
}
while((rd = fread(buffer,sizeof(char),1023,input))){
/**Fill the read buffer*/
if(strsz + rd >= buffsz){
char* tmp = realloc(strbuff,(buffsz*2)*sizeof(char));
if(tmp == NULL){
free(strbuff);
fclose(input);
fclose(expected);
mysql_library_end();
fprintf(stderr,"Error: Memory allocation failed.");
return 1;
}
strbuff = tmp;
buffsz *= 2;
}
memcpy(strbuff+strsz,buffer,rd);
strsz += rd;
*(strbuff+strsz) = '\0';
char *tok,*nlptr;
/**Remove newlines*/
while((nlptr = strpbrk(strbuff,"\n")) != NULL && (nlptr - strbuff) < strsz){
memmove(nlptr,nlptr+1,strsz - (nlptr + 1 - strbuff));
strsz -= 1;
}
/**Parse read buffer for full queries*/
while(strpbrk(strbuff,";") != NULL){
tok = strpbrk(strbuff,";");
unsigned int qlen = tok - strbuff + 1;
GWBUF* buff = gwbuf_alloc(qlen+6);
*((unsigned char*)(buff->start)) = qlen;
*((unsigned char*)(buff->start + 1)) = (qlen >> 8);
*((unsigned char*)(buff->start + 2)) = (qlen >> 16);
*((unsigned char*)(buff->start + 3)) = 0x00;
*((unsigned char*)(buff->start + 4)) = 0x03;
memcpy(buff->start+5, strbuff, qlen);
memmove(strbuff,tok + 1, strsz - qlen);
strsz -= qlen;
memset(strbuff + strsz,0,buffsz - strsz);
skygw_query_type_t type = query_classifier_get_type(buff);
char qtypestr[64];
char expbuff[256];
int expos = 0;
while((rd = fgetc(expected)) != '\n' && !feof(expected)){
expbuff[expos++] = rd;
}
expbuff[expos] = '\0';
if(type == QUERY_TYPE_UNKNOWN){
sprintf(qtypestr,"QUERY_TYPE_UNKNOWN");
}
if(type & QUERY_TYPE_LOCAL_READ){
sprintf(qtypestr,"QUERY_TYPE_LOCAL_READ");
}
if(type & QUERY_TYPE_READ){
sprintf(qtypestr,"QUERY_TYPE_READ");
}
if(type & QUERY_TYPE_WRITE){
sprintf(qtypestr,"QUERY_TYPE_WRITE");
}
if(type & QUERY_TYPE_MASTER_READ){
sprintf(qtypestr,"QUERY_TYPE_MASTER_READ");
}
if(type & QUERY_TYPE_SESSION_WRITE){
sprintf(qtypestr,"QUERY_TYPE_SESSION_WRITE");
}
if(type & QUERY_TYPE_USERVAR_READ){
sprintf(qtypestr,"QUERY_TYPE_USERVAR_READ");
}
if(type & QUERY_TYPE_SYSVAR_READ){
sprintf(qtypestr,"QUERY_TYPE_SYSVAR_READ");
}
if(type & QUERY_TYPE_GSYSVAR_READ){
sprintf(qtypestr,"QUERY_TYPE_GSYSVAR_READ");
}
if(type & QUERY_TYPE_GSYSVAR_WRITE){
sprintf(qtypestr,"QUERY_TYPE_GSYSVAR_WRITE");
}
if(type & QUERY_TYPE_BEGIN_TRX){
sprintf(qtypestr,"QUERY_TYPE_BEGIN_TRX");
}
if(type & QUERY_TYPE_ENABLE_AUTOCOMMIT){
sprintf(qtypestr,"QUERY_TYPE_ENABLE_AUTOCOMMIT");
}
if(type & QUERY_TYPE_DISABLE_AUTOCOMMIT){
sprintf(qtypestr,"QUERY_TYPE_DISABLE_AUTOCOMMIT");
}
if(type & QUERY_TYPE_ROLLBACK){
sprintf(qtypestr,"QUERY_TYPE_ROLLBACK");
}
if(type & QUERY_TYPE_COMMIT){
sprintf(qtypestr,"QUERY_TYPE_COMMIT");
}
if(type & QUERY_TYPE_PREPARE_NAMED_STMT){
sprintf(qtypestr,"QUERY_TYPE_PREPARE_NAMED_STMT");
}
if(type & QUERY_TYPE_PREPARE_STMT){
sprintf(qtypestr,"QUERY_TYPE_PREPARE_STMT");
}
if(type & QUERY_TYPE_EXEC_STMT){
sprintf(qtypestr,"QUERY_TYPE_EXEC_STMT");
}
if(type & QUERY_TYPE_CREATE_TMP_TABLE){
sprintf(qtypestr,"QUERY_TYPE_CREATE_TMP_TABLE");
}
if(type & QUERY_TYPE_READ_TMP_TABLE){
sprintf(qtypestr,"QUERY_TYPE_READ_TMP_TABLE");
}
if(strcmp(qtypestr,expbuff) != 0){
printf("Error in output: '%s' was expected but got '%s'",expbuff,qtypestr);
ex_val = 1;
}
gwbuf_free(buff);
}
}
fclose(input);
fclose(expected);
mysql_library_end();
free(strbuff);
return ex_val;
}
/**
* The routeQuery entry point. This is passed the query buffer
* to which the filter should be applied. Once processed the
* query is passed to the downstream component
* (filter or router) in the filter chain.
*
* The Luafilter calls the routeQuery functions of both the session and the global script.
* The query is passed as a string parameter to the routeQuery Lua function and
* the return values of the session specific function, if any were returned,
* are interpreted. If the first value is bool, it is interpreted as a decision
* whether to route the query or to send an error packet to the client.
* If it is a string, the current query is replaced with the return value and
* the query will be routed. If nil is returned, the query is routed normally.
*
* @param instance The filter instance data
* @param session The filter session
* @param queue The query data
*/
static int routeQuery(FILTER *instance, void *session, GWBUF *queue)
{
LUA_SESSION *my_session = (LUA_SESSION *) session;
LUA_INSTANCE *my_instance = (LUA_INSTANCE *) instance;
DCB* dcb = my_session->session->client_dcb;
char *fullquery = NULL, *ptr;
bool route = true;
GWBUF* forward = queue;
int rc = 0;
if (modutil_is_SQL(queue) || modutil_is_SQL_prepare(queue))
{
fullquery = modutil_get_SQL(queue);
if (fullquery && my_session->lua_state)
{
spinlock_acquire(&my_session->lock);
lua_getglobal(my_session->lua_state, "routeQuery");
lua_pushlstring(my_session->lua_state, fullquery, strlen(fullquery));
if (lua_pcall(my_session->lua_state, 1, 1, 0))
{
MXS_ERROR("luafilter: Session scope call to 'routeQuery' failed: '%s'.",
lua_tostring(my_session->lua_state, -1));
}
else if (lua_gettop(my_session->lua_state))
{
if (lua_isstring(my_session->lua_state, -1))
{
if (forward)
{
gwbuf_free(forward);
}
forward = modutil_create_query((char*) lua_tostring(my_session->lua_state, -1));
}
else if (lua_isboolean(my_session->lua_state, -1))
{
route = lua_toboolean(my_session->lua_state, -1);
}
}
spinlock_release(&my_session->lock);
}
if (my_instance->global_lua_state)
{
spinlock_acquire(&my_instance->lock);
lua_getglobal(my_instance->global_lua_state, "routeQuery");
lua_pushlstring(my_instance->global_lua_state, fullquery, strlen(fullquery));
if (lua_pcall(my_instance->global_lua_state, 1, 0, 0))
{
MXS_ERROR("luafilter: Global scope call to 'routeQuery' failed: '%s'.",
lua_tostring(my_session->lua_state, -1));
}
else if (lua_gettop(my_instance->global_lua_state))
{
if (lua_isstring(my_instance->global_lua_state, -1))
{
if (forward)
{
gwbuf_free(forward);
}
forward = modutil_create_query((char*)
lua_tostring(my_instance->global_lua_state, -1));
}
else if (lua_isboolean(my_instance->global_lua_state, -1))
{
route = lua_toboolean(my_instance->global_lua_state, -1);
}
}
spinlock_release(&my_instance->lock);
}
free(fullquery);
}
if (!route)
{
gwbuf_free(queue);
GWBUF* err = modutil_create_mysql_err_msg(1, 0, 1045, "28000", "Access denied.");
rc = dcb->func.write(dcb, err);
}
else
{
rc = my_session->down.routeQuery(my_session->down.instance,
my_session->down.session, forward);
}
return rc;
}
/**
* The clientReply entry point. This is passed the response buffer
* to which the filter should be applied. Once processed the
* query is passed to the upstream component
* (filter or router) in the filter chain.
*
* @param instance The filter instance data
* @param session The filter session
* @param reply The response data
*/
static int
clientReply(FILTER* instance, void *session, GWBUF *reply)
{
int rc, branch, eof;
TEE_SESSION *my_session = (TEE_SESSION *) session;
bool route = false, mpkt;
GWBUF *complete = NULL;
unsigned char *ptr;
uint16_t flags = 0;
int min_eof = my_session->command != 0x04 ? 2 : 1;
int more_results = 0;
#ifdef SS_DEBUG
int prev_debug_seq = atomic_add(&debug_seq, 1);
ptr = (unsigned char*) reply->start;
MXS_INFO("Tee clientReply [%s] [%s] [%s]: %d",
instance ? "parent" : "child",
my_session->active ? "open" : "closed",
PTR_IS_ERR(ptr) ? "ERR" : PTR_IS_OK(ptr) ? "OK" : "RSET",
prev_debug_seq);
#endif
spinlock_acquire(&my_session->tee_lock);
if (!my_session->active)
{
MXS_INFO("Tee: Failed to return reply, session is closed");
gwbuf_free(reply);
rc = 0;
if (my_session->waiting[PARENT])
{
GWBUF* errbuf = modutil_create_mysql_err_msg(1, 0, 1, "0000", "Session closed.");
my_session->waiting[PARENT] = false;
my_session->up.clientReply(my_session->up.instance,
my_session->up.session,
errbuf);
}
goto retblock;
}
branch = instance == NULL ? CHILD : PARENT;
my_session->tee_partials[branch] = gwbuf_append(my_session->tee_partials[branch], reply);
my_session->tee_partials[branch] = gwbuf_make_contiguous(my_session->tee_partials[branch]);
complete = modutil_get_complete_packets(&my_session->tee_partials[branch]);
if (complete == NULL)
{
/** Incomplete packet */
MXS_DEBUG("tee.c: Incomplete packet, "
"waiting for a complete packet before forwarding.");
rc = 1;
goto retblock;
}
complete = gwbuf_make_contiguous(complete);
if (my_session->tee_partials[branch] &&
GWBUF_EMPTY(my_session->tee_partials[branch]))
{
gwbuf_free(my_session->tee_partials[branch]);
my_session->tee_partials[branch] = NULL;
}
ptr = (unsigned char*) complete->start;
if (my_session->replies[branch] == 0)
{
MXS_INFO("Tee: First reply to a query for [%s].", branch == PARENT ? "PARENT" : "CHILD");
/* Reply is in a single packet if it is an OK, ERR or LOCAL_INFILE packet.
* Otherwise the reply is a result set and the amount of packets is unknown.
*/
if (PTR_IS_ERR(ptr) || PTR_IS_LOCAL_INFILE(ptr) ||
PTR_IS_OK(ptr) || !my_session->multipacket[branch])
{
my_session->waiting[branch] = false;
my_session->multipacket[branch] = false;
if (PTR_IS_OK(ptr))
{
flags = get_response_flags(ptr, true);
more_results = (flags & 0x08) && my_session->client_multistatement;
if (more_results)
{
MXS_INFO("Tee: [%s] waiting for more results.", branch == PARENT ? "PARENT" : "CHILD");
}
}
}
#ifdef SS_DEBUG
else
{
MXS_DEBUG("tee.c: [%ld] Waiting for a result set from %s session.",
my_session->d_id,
branch == PARENT ? "parent" : "child");
}
#endif
}
if (my_session->waiting[branch])
{
eof = modutil_count_signal_packets(complete, my_session->use_ok, my_session->eof[branch] > 0, &more_results);
more_results &= my_session->client_multistatement;
my_session->eof[branch] += eof;
if (my_session->eof[branch] >= min_eof)
{
#ifdef SS_DEBUG
MXS_DEBUG("tee.c [%ld] %s received last EOF packet",
my_session->d_id,
branch == PARENT ? "parent" : "child");
#endif
my_session->waiting[branch] = more_results;
if (more_results)
{
my_session->eof[branch] = 0;
}
}
}
if (branch == PARENT)
{
my_session->tee_replybuf = gwbuf_append(my_session->tee_replybuf, complete);
}
else
{
gwbuf_free(complete);
}
my_session->replies[branch]++;
rc = 1;
mpkt = my_session->multipacket[PARENT] || my_session->multipacket[CHILD];
if (my_session->tee_replybuf != NULL)
{
if (my_session->branch_session == NULL)
{
rc = 0;
gwbuf_free(my_session->tee_replybuf);
my_session->tee_replybuf = NULL;
MXS_ERROR("Tee child session was closed.");
}
if (mpkt)
{
if (my_session->waiting[PARENT])
{
route = true;
}
else if (my_session->eof[PARENT] >= min_eof &&
my_session->eof[CHILD] >= min_eof)
{
route = true;
#ifdef SS_DEBUG
MXS_DEBUG("tee.c:[%ld] Routing final packet of response set.", my_session->d_id);
#endif
}
}
else if (!my_session->waiting[PARENT] &&
!my_session->waiting[CHILD])
{
#ifdef SS_DEBUG
MXS_DEBUG("tee.c:[%ld] Routing single packet response.", my_session->d_id);
#endif
route = true;
}
}
if (route)
{
#ifdef SS_DEBUG
MXS_DEBUG("tee.c:[%ld] Routing buffer '%p' parent(waiting [%s] replies [%d] eof[%d])"
" child(waiting [%s] replies[%d] eof [%d])",
my_session->d_id,
my_session->tee_replybuf,
my_session->waiting[PARENT] ? "true" : "false",
my_session->replies[PARENT],
my_session->eof[PARENT],
my_session->waiting[CHILD] ? "true" : "false",
my_session->replies[CHILD],
my_session->eof[CHILD]);
#endif
rc = my_session->up.clientReply(my_session->up.instance,
my_session->up.session,
my_session->tee_replybuf);
my_session->tee_replybuf = NULL;
}
if (my_session->queue &&
!my_session->waiting[PARENT] &&
!my_session->waiting[CHILD])
{
GWBUF* buffer = modutil_get_next_MySQL_packet(&my_session->queue);
GWBUF* clone = clone_query(my_session->instance, my_session, buffer);
reset_session_state(my_session, buffer);
route_single_query(my_session->instance, my_session, buffer, clone);
MXS_INFO("tee: routing queued query");
}
retblock:
spinlock_release(&my_session->tee_lock);
return rc;
}
/**
* Loads a query from a file
*@return 0 if successful, 1 if an error occurred
*/
int load_query()
{
char** query_list = NULL;
char* buffer = NULL;
int i, qcount = 0, qbuff_sz = 10, rval = 0;
int offset = 0;
unsigned int qlen = 0;
buffer = (char*)calloc(4092,sizeof(char));
if(buffer == NULL){
printf("Error: cannot allocate enough memory.\n");
MXS_ERROR("cannot allocate enough memory.\n");
return 1;
}
query_list = calloc(qbuff_sz,sizeof(char*));
if(query_list == NULL){
printf("Error: cannot allocate enough memory.\n");
MXS_ERROR("cannot allocate enough memory.\n");
free(buffer);
return 1;
}
while((offset = fdgets(instance.infile,buffer,4092))){
if(qbuff_sz <= qcount){
char** tmpbuff = realloc(query_list,sizeof(char*)*qbuff_sz*2);
if(tmpbuff == NULL){
printf("Error: cannot allocate enough memory.\n");
MXS_ERROR("cannot allocate enough memory.\n");
rval = 1;
goto retblock;
}
query_list = tmpbuff;
qbuff_sz *= 2;
}
query_list[qcount] = calloc((offset + 1),sizeof(char));
strcpy(query_list[qcount],buffer);
offset = 0;
qcount++;
}
/**TODO check what messes up the first querystring*/
GWBUF** tmpbff = malloc(sizeof(GWBUF*)*(qcount + 1));
if(tmpbff){
for(i = 0;i<qcount;i++){
tmpbff[i] = gwbuf_alloc(strlen(query_list[i]) + 6);
if(tmpbff[i] == NULL)
{
printf("Error: cannot allocate a new buffer.\n");
MXS_ERROR("cannot allocate a new buffer.\n");
int x;
for(x = 0;x<i;x++)
{
gwbuf_free(tmpbff[x]);
}
free(tmpbff);
rval = 1;
goto retblock;
}
gwbuf_set_type(tmpbff[i],GWBUF_TYPE_MYSQL);
strcpy((char*)(tmpbff[i]->start + 5),query_list[i]);
qlen = strlen(query_list[i]) + 1;
tmpbff[i]->sbuf->data[0] = qlen;
tmpbff[i]->sbuf->data[1] = (qlen << 8);
tmpbff[i]->sbuf->data[2] = (qlen << 16);
tmpbff[i]->sbuf->data[3] = 0x00;
tmpbff[i]->sbuf->data[4] = 0x03;
}
tmpbff[qcount] = NULL;
instance.buffer = tmpbff;
}else{
printf("Error: cannot allocate enough memory for buffers.\n");
MXS_ERROR("cannot allocate enough memory for buffers.\n");
free_buffers();
rval = 1;
goto retblock;
}
if(qcount < 1){
rval = 1;
goto retblock;
}
instance.buffer_count = qcount;
retblock:
for(i = 0;i<qcount;i++)
{
free(query_list[i]);
}
free(query_list);
free(buffer);
return rval;
}
