/**
* \brief This function tries to handle Tag_Destroy command
*/
int vs_handle_tag_destroy(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *tag_destroy)
{
struct VSNode *node;
struct VSTagGroup *tg;
struct VSTag *tag;
uint32 node_id = UINT32(tag_destroy->data[0]);
uint16 taggroup_id = UINT16(tag_destroy->data[UINT32_SIZE]);
uint16 tag_id = UINT16(tag_destroy->data[UINT32_SIZE + UINT16_SIZE]);
int ret = 0;
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if(vs_node_is_created(node) != 1) {
goto end;
}
/* Is user owner of this node or can user write to this node? */
if(vs_node_can_write(vsession, node) != 1) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s can't write to node: %d\n",
__FUNCTION__,
((struct VSUser *)vsession->user)->username,
node->id);
goto end;
}
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag_group (id: %d) in node (id: %d) not found\n",
__FUNCTION__, taggroup_id, node_id);
goto end;
}
/* Try to find Tag */
if ( (tag = vs_tag_find(tg, tag_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag (id: %d) in tag_group (id: %d), node (id: %d) not found\n",
__FUNCTION__, tag_id, taggroup_id, node_id);
goto end;
}
ret = vs_tag_send_destroy(node, tg, tag);
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function handle taggroup_unsubscribe command
*/
int vs_handle_taggroup_unsubscribe(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *taggroup_unsubscribe)
{
struct VSNode *node;
struct VSTagGroup *tg;
uint32 node_id = UINT32(taggroup_unsubscribe->data[0]);
uint16 taggroup_id = UINT16(taggroup_unsubscribe->data[UINT32_SIZE]);
int ret = 0;
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if( vs_node_is_created(node) != 1 ) {
ret = 0;
} else {
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag_group (id: %d) in node (id: %d) not found\n",
__FUNCTION__, taggroup_id, node_id);
ret = 0;
} else {
ret = vs_taggroup_unsubscribe(tg, vsession);
}
}
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function handle node_subscribe command
*/
int vs_handle_taggroup_subscribe(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *taggroup_subscribe)
{
struct VSNode *node;
uint32 node_id = UINT32(taggroup_subscribe->data[0]);
uint16 taggroup_id = UINT16(taggroup_subscribe->data[UINT32_SIZE]);
int ret = 0;
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if( vs_node_is_created(node) != 1 ) {
goto end;
}
/* Is user owner of the node or can user read the node? */
if(vs_node_can_read(vsession, node) == 1) {
struct VSNodeSubscriber *node_subscriber;
struct VSTagGroup *tg;
struct VSTag *tag;
struct VSEntitySubscriber *tg_subscriber;
struct VBucket *bucket;
/* Try to find node subscriber */
node_subscriber = node->node_subs.first;
while(node_subscriber != NULL) {
if(node_subscriber->session == vsession) {
break;
}
node_subscriber = node_subscriber->next;
}
/* Client has to be subscribed to the node first */
if(node_subscriber == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): client has to be subscribed to the node: %d before subscribing to the tag_group: %d\n",
__FUNCTION__, node_id, taggroup_id);
goto end;
}
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag_group (id: %d) in node (id: %d) not found\n",
__FUNCTION__, taggroup_id, node_id);
goto end;
}
/* Is Client already subscribed to this tag group? */
tg_subscriber = tg->tg_subs.first;
while(tg_subscriber != NULL) {
if(tg_subscriber->node_sub->session->session_id == vsession->session_id) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() client already subscribed to the tag_group (id: %d) in node (id: %d)\n",
__FUNCTION__, taggroup_id, node_id);
goto end;
}
tg_subscriber = tg_subscriber->next;
}
ret = 1;
/* Add new subscriber to the list of tag group subscribers */
tg_subscriber = (struct VSEntitySubscriber*)malloc(sizeof(struct VSEntitySubscriber));
tg_subscriber->node_sub = node_subscriber;
v_list_add_tail(&tg->tg_subs, tg_subscriber);
/* Send tag create for all tags in this tag group
* TODO: do not send all tags at once, when there is lot of tags in this
* tag group. Implement this, when queue limits will be finished. */
bucket = tg->tags.lb.first;
while(bucket != NULL) {
tag = (struct VSTag*)bucket->data;
if(tag->state == ENTITY_CREATING || tag->state == ENTITY_CREATED) {
if(vs_tag_send_create(tg_subscriber, node, tg, tag) != 1) {
ret = 0;
}
}
bucket = bucket->next;
}
} else {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s doesn't have permissions to subscribe to taggroup: %d in node: %d\n",
__FUNCTION__,
((struct VSUser *)vsession->user)->username,
taggroup_id, node->id);
}
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function tries to handle node_create command
*/
int vs_handle_taggroup_create(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *taggroup_create_cmd)
{
struct VSNode *node;
struct VSTagGroup *tg;
struct VBucket *vbucket;
uint32 node_id = UINT32(taggroup_create_cmd->data[0]);
uint16 taggroup_id = UINT16(taggroup_create_cmd->data[UINT32_SIZE]);
uint16 type = UINT16(taggroup_create_cmd->data[UINT32_SIZE+UINT16_SIZE]);
int ret = 0;
/* Client has to send taggroup_create command with taggroup_id equal to
* the value 0xFFFF */
if(taggroup_id != VRS_RESERVED_TAGGROUP_ID) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() taggroup_id: %d is not 0xFFFF\n",
__FUNCTION__, taggroup_id);
return 0;
}
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if( vs_node_is_created(node) != 1 ) {
goto end;
}
vbucket = node->tag_groups.lb.first;
/* Check, if there isn't tag group with the same type */
while(vbucket != NULL) {
tg = vbucket->data;
if(tg->custom_type == type) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() taggroup type: %d is already used in node: %d\n",
__FUNCTION__, type, node->id);
goto end;
}
vbucket = vbucket->next;
}
/* Is user owner of this node or can user write to this node? */
if(vs_node_can_write(vsession, node) != 1) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s can't write to node: %d\n",
__FUNCTION__,
((struct VSUser *)vsession->user)->username,
node->id);
goto end;
}
/* Try to create new tag group */
tg = vs_taggroup_create(node, VRS_RESERVED_TAGGROUP_ID, type);
if(tg == NULL) {
goto end;
} else {
struct VSNodeSubscriber *node_subscriber;
/* Set state for this entity */
tg->state = ENTITY_CREATING;
ret = 1;
/* Send tag group create command to all subscribers to the node
* that can read this node */
for(node_subscriber = node->node_subs.first;
node_subscriber != NULL;
node_subscriber = node_subscriber->next)
{
if( vs_node_can_read(node_subscriber->session, node) == 1) {
if(vs_taggroup_send_create(node_subscriber, node, tg) != 1) {
ret = 0;
}
}
}
}
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function tries to handle Tag_Set_Int8 command
*/
int vs_handle_tag_set(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *tag_set,
uint8 data_type,
uint8 count)
{
struct VSNode *node;
struct VSTagGroup *tg;
struct VSTag *tag;
struct VSEntitySubscriber *tg_subscriber;
uint32 node_id;
uint16 taggroup_id;
uint16 tag_id;
int ret = 0;
node_id = UINT32(tag_set->data[0]);
taggroup_id = UINT16(tag_set->data[UINT32_SIZE]);
tag_id = UINT16(tag_set->data[UINT32_SIZE + UINT16_SIZE]);
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if(vs_node_is_created(node) != 1) {
goto end;
}
/* Is user owner of this node or can user write to this node? */
if(vs_node_can_write(vsession, node) != 1) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s can't write to node: %d\n",
__FUNCTION__,
((struct VSUser *)vsession->user)->username,
node->id);
goto end;
}
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag_group (id: %d) in node (id: %d) not found\n",
__FUNCTION__, taggroup_id, node_id);
goto end;
}
/* Try to find Tag */
if ( (tag = vs_tag_find(tg, tag_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag (id: %d) in tag_group (id: %d), node (id: %d) not found\n",
__FUNCTION__, tag_id, taggroup_id, node_id);
goto end;
}
/* Data type has to match */
if(data_type != tag->data_type) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() data type (%d) of tag (id: %d) in tg (id: %d) in node (id: %d) does not match data type of received command (%d)\n",
__FUNCTION__, tag->data_type, tag_id,
taggroup_id, node_id, data_type);
goto end;
}
/* Count of values has to match */
if(count != tag->count) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() count of values (%d) of tag (id: %d) in tg (id: %d) in node (id: %d) does not match count of values of received command (%d)\n",
__FUNCTION__, tag->count, tag_id, taggroup_id, node_id, count);
goto end;
}
/* Set value in tag */
switch(tag->data_type) {
case VRS_VALUE_TYPE_UINT8:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], UINT8_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_UINT16:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], UINT16_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_UINT32:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], UINT32_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_UINT64:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], UINT64_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_REAL16:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], REAL16_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_REAL32:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], REAL32_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_REAL64:
memcpy(tag->value, &tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE], REAL64_SIZE*tag->count);
break;
case VRS_VALUE_TYPE_STRING8:
if(tag->value == NULL) {
tag->value = strdup(PTR(tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE]));
} else {
size_t new_str_len = strlen(PTR(tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE]));
size_t old_str_len = strlen((char*)tag->value);
/* Rewrite old string */
if(new_str_len == old_str_len) {
strcpy((char*)tag->value, PTR(tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE]));
} else {
tag->value = (char*)realloc(tag->value, new_str_len*sizeof(char));
strcpy((char*)tag->value, PTR(tag_set->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE]));
}
}
break;
default:
assert(0);
break;
}
ret = 1;
/* Set this tag as initialized, because value of this tag was set. */
tag->flag = TAG_INITIALIZED;
vs_taggroup_inc_version(tg);
/* Send this tag to all client subscribed to the TagGroup */
tg_subscriber = tg->tg_subs.first;
while(tg_subscriber != NULL) {
if(vs_tag_send_set(tg_subscriber->node_sub->session, tg_subscriber->node_sub->prio, node, tg, tag) != 1) {
ret = 0;
}
tg_subscriber = tg_subscriber->next;
}
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function tries to handle Tag_Create command
*/
int vs_handle_tag_create(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *tag_create)
{
struct VSNode *node;
struct VSTagGroup *tg;
struct VSTag *tag;
struct VBucket *vbucket;
struct VSEntitySubscriber *tg_subscriber;
uint32 node_id = UINT32(tag_create->data[0]);
uint16 taggroup_id = UINT16(tag_create->data[UINT32_SIZE]);
uint16 tag_id = UINT16(tag_create->data[UINT32_SIZE + UINT16_SIZE]);
uint8 data_type = UINT8(tag_create->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE]);
uint8 count = UINT8(tag_create->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE + UINT8_SIZE]);
uint16 type = UINT16(tag_create->data[UINT32_SIZE + UINT16_SIZE + UINT16_SIZE + UINT8_SIZE + UINT8_SIZE]);
int ret = 0;
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__FUNCTION__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if(vs_node_is_created(node) != 1) {
goto end;
}
/* User has to have permission to write to the node */
if(vs_node_can_write(vsession, node) != 1) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s can't write to node: %d\n",
__FUNCTION__,
((struct VSUser *)vsession->user)->username,
node->id);
goto end;
}
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag_group (id: %d) in node (id: %d) not found\n",
__FUNCTION__, taggroup_id, node_id);
goto end;
}
/* Tag Group has to be created too (it can't be in DELETING or DELETED state ) */
if(!(tg->state == ENTITY_CREATED || tg->state == ENTITY_CREATING)) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag group (id: %d) from node (id: %d) is not in CREATING or CREATED state: %d\n",
__FUNCTION__, tg->id, node->id, tg->state);
goto end;
}
/* Client has to send tag_create command with tag_id equal to
* the value 0xFFFF */
if(tag_id != RESERVED_TAG_ID) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag_id: %d is not 0xFFFF\n",
__FUNCTION__, tag_id);
goto end;
}
/* Is type of Tag supported? */
if(!(data_type>VRS_VALUE_TYPE_RESERVED && data_type<=VRS_VALUE_TYPE_STRING8)) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag_type: %d is not supported\n",
__FUNCTION__, data_type);
goto end;
}
vbucket = tg->tags.lb.first;
/* Check, if there isn't tag with the same type */
while(vbucket != NULL) {
tag = vbucket->data;
if(tag->custom_type == type) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() tag type: %d is already used in taggroup: %d\n",
__FUNCTION__, type, tg->id);
goto end;
}
vbucket = vbucket->next;
}
if (v_hash_array_count_items(&tg->tags) > MAX_TAGS_COUNT) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() max number of tags in node: %d tag_group: %d was reached\n",
tg->id);
goto end;
}
/* Try to create new tag */
tag = vs_tag_create(tg, RESERVED_TAG_ID, data_type, count, type);
if(tag == NULL) {
goto end;
}
ret = 1;
tag->state = ENTITY_CREATING;
/* Send TagCreate to all subscribers of tag group */
tg_subscriber = tg->tg_subs.first;
while(tg_subscriber != NULL) {
if(vs_tag_send_create(tg_subscriber, node, tg, tag) != 1) {
ret = 0;
}
tg_subscriber = tg_subscriber->next;
}
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}
/**
* \brief This function handle node_subscribe command
*/
int vs_handle_taggroup_subscribe(struct VS_CTX *vs_ctx,
struct VSession *vsession,
struct Generic_Cmd *taggroup_subscribe)
{
struct VSNode *node;
uint32 node_id = UINT32(taggroup_subscribe->data[0]);
uint16 taggroup_id = UINT16(taggroup_subscribe->data[UINT32_SIZE]);
int ret = 0;
/* Try to find node */
if((node = vs_node_find(vs_ctx, node_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG, "%s() node (id: %d) not found\n",
__func__, node_id);
return 0;
}
pthread_mutex_lock(&node->mutex);
/* Node has to be created */
if( vs_node_is_created(node) != 1 ) {
goto end;
}
/* Is user owner of the node or can user read the node? */
if(vs_node_can_read(vsession, node) == 1) {
struct VSNodeSubscriber *node_subscriber;
struct VSTagGroup *tg;
struct VSTag *tag;
struct VSEntitySubscriber *tg_subscriber;
struct VBucket *bucket;
/* Try to find node subscriber */
node_subscriber = node->node_subs.first;
while(node_subscriber != NULL) {
if(node_subscriber->session == vsession) {
break;
}
node_subscriber = node_subscriber->next;
}
/* Client has to be subscribed to the node first */
if(node_subscriber == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): client has to be subscribed to the node: %d before subscribing to the tag_group: %d\n",
__func__, node_id, taggroup_id);
goto end;
}
/* Try to find TagGroup */
if( (tg = vs_taggroup_find(node, taggroup_id)) == NULL) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() tag_group (id: %d) in node (id: %d) not found\n",
__func__, taggroup_id, node_id);
goto end;
}
/* Is Client already subscribed to this tag group? */
tg_subscriber = tg->tg_subs.first;
while(tg_subscriber != NULL) {
if(tg_subscriber->node_sub->session->session_id == vsession->session_id) {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s() client already subscribed to the tag_group (id: %d) in node (id: %d)\n",
__func__, taggroup_id, node_id);
goto end;
}
tg_subscriber = tg_subscriber->next;
}
ret = 1;
/* Add new subscriber to the list of tag group subscribers */
tg_subscriber = (struct VSEntitySubscriber*)malloc(sizeof(struct VSEntitySubscriber));
tg_subscriber->node_sub = node_subscriber;
v_list_add_tail(&tg->tg_subs, tg_subscriber);
/* Try to send tag_create for all tags in this tag group */
bucket = tg->tags.lb.first;
while(bucket != NULL) {
tag = (struct VSTag*)bucket->data;
vs_tag_send_create(tg_subscriber, node, tg, tag);
/* When TCP/WebSocket is used and tag is initialized, then it
* is possible (necessary) to send value too. */
if( ((vsession->flags & VRS_TP_TCP) ||
(vsession->flags & VRS_TP_WEBSOCKET)) &&
(tag->flag & TAG_INITIALIZED))
{
vs_tag_send_set(vsession, node_subscriber->prio, node, tg, tag);
}
bucket = bucket->next;
}
} else {
v_print_log(VRS_PRINT_DEBUG_MSG,
"%s(): user: %s doesn't have permissions to subscribe to taggroup: %d in node: %d\n",
__func__,
((struct VSUser *)vsession->user)->username,
taggroup_id, node->id);
}
end:
pthread_mutex_unlock(&node->mutex);
return ret;
}