int mk_conn_error(int socket)
{
int ret = -1;
struct client_session *cs;
struct sched_list_node *sched;
MK_TRACE("Connection Handler, error on FD %i", socket);
/* Plugin hook */
ret = mk_plugin_event_error(socket);
switch(ret) {
case MK_PLUGIN_RET_EVENT_OWNED:
return MK_PLUGIN_RET_CONTINUE;
case MK_PLUGIN_RET_EVENT_CLOSE:
return -1;
case MK_PLUGIN_RET_EVENT_CONTINUE:
break; /* just return controller to invoker */
}
sched = mk_sched_get_thread_conf();
mk_sched_remove_client(sched, socket);
cs = mk_session_get(socket);
if (cs) {
mk_session_remove(socket);
}
return 0;
}
int mk_conn_read(int socket)
{
int ret;
struct client_session *cs;
struct sched_list_node *sched;
MK_TRACE("[FD %i] Connection Handler / read", socket);
/* Plugin hook */
ret = mk_plugin_event_read(socket);
switch(ret) {
case MK_PLUGIN_RET_EVENT_OWNED:
return MK_PLUGIN_RET_CONTINUE;
case MK_PLUGIN_RET_EVENT_CLOSE:
return -1;
case MK_PLUGIN_RET_EVENT_CONTINUE:
break; /* just return controller to invoker */
}
sched = mk_sched_get_thread_conf();
cs = mk_session_get(socket);
if (!cs) {
/* Note: Linux don't set TCP_NODELAY socket flag by default */
if (mk_socket_set_tcp_nodelay(socket) != 0) {
mk_warn("TCP_NODELAY failed");
}
/* Create session for the client */
MK_TRACE("[FD %i] Create session", socket);
cs = mk_session_create(socket, sched);
if (!cs) {
return -1;
}
}
/* Read incomming data */
ret = mk_handler_read(socket, cs);
if (ret > 0) {
if (mk_http_pending_request(cs) == 0) {
mk_epoll_change_mode(sched->epoll_fd,
socket, MK_EPOLL_WRITE, MK_EPOLL_LEVEL_TRIGGERED);
}
else if (cs->body_length + 1 >= config->max_request_size) {
/*
* Request is incomplete and our buffer is full,
* close connection
*/
mk_session_remove(socket);
return -1;
}
else {
MK_TRACE("[FD %i] waiting for pending data", socket);
}
}
return ret;
}
int mk_http_request_end(int socket)
{
int ka;
struct client_session *cs;
struct sched_list_node *sched;
sched = mk_sched_get_thread_conf();
cs = mk_session_get(socket);
if (!cs) {
MK_TRACE("[FD %i] Not found", socket);
return -1;
}
if (mk_unlikely(!sched)) {
MK_TRACE("Could not find sched list node :/");
return -1;
}
/*
* We need to ask to http_keepalive if this
* connection can continue working or we must
* close it.
*/
ka = mk_http_keepalive_check(cs);
mk_request_free_list(cs);
if (ka < 0) {
MK_TRACE("[FD %i] No KeepAlive mode, remove", socket);
mk_session_remove(socket);
}
else {
mk_request_ka_next(cs);
mk_epoll_change_mode(sched->epoll_fd,
socket, MK_EPOLL_READ, MK_EPOLL_LEVEL_TRIGGERED);
return 0;
}
return -1;
}
int mk_conn_write(int socket)
{
int ret = -1;
struct client_session *cs;
struct sched_list_node *sched;
struct sched_connection *conx;
MK_TRACE("[FD %i] Connection Handler / write", socket);
/* Plugin hook */
ret = mk_plugin_event_write(socket);
switch(ret) {
case MK_PLUGIN_RET_EVENT_OWNED:
return MK_PLUGIN_RET_CONTINUE;
case MK_PLUGIN_RET_EVENT_CLOSE:
return -1;
case MK_PLUGIN_RET_EVENT_CONTINUE:
break; /* just return controller to invoker */
}
MK_TRACE("[FD %i] Normal connection write handling", socket);
sched = mk_sched_get_thread_conf();
conx = mk_sched_get_connection(sched, socket);
if (!conx) {
MK_TRACE("[FD %i] Registering new connection");
if (mk_sched_register_client(socket, sched) == -1) {
MK_TRACE("[FD %i] Close requested", socket);
return -1;
}
mk_epoll_change_mode(sched->epoll_fd, socket,
MK_EPOLL_READ, MK_EPOLL_LEVEL_TRIGGERED);
return 0;
}
mk_sched_update_conn_status(sched, socket, MK_SCHEDULER_CONN_PROCESS);
/* Get node from schedule list node which contains
* the information regarding to the current client/socket
*/
cs = mk_session_get(socket);
if (!cs) {
/* This is a ghost connection that doesn't exist anymore.
* Closing it could accidentally close some other thread's
* socket, so pass it to remove_client that checks it's ours.
*/
mk_sched_remove_client(sched, socket);
return 0;
}
ret = mk_handler_write(socket, cs);
/* if ret < 0, means that some error
* happened in the writer call, in the
* other hand, 0 means a successful request
* processed, if ret > 0 means that some data
* still need to be send.
*/
if (ret < 0) {
mk_request_free_list(cs);
mk_session_remove(socket);
return -1;
}
else if (ret == 0) {
return mk_http_request_end(socket);
}
else if (ret > 0) {
return 0;
}
/* avoid to make gcc cry :_( */
return -1;
}
int mk_conn_read(int socket)
{
int ret;
struct client_session *cs;
struct sched_list_node *sched;
MK_TRACE("[FD %i] Connection Handler / read", socket);
/* Plugin hook */
ret = mk_plugin_event_read(socket);
switch(ret) {
case MK_PLUGIN_RET_EVENT_OWNED:
return MK_PLUGIN_RET_CONTINUE;
case MK_PLUGIN_RET_EVENT_CLOSE:
return -1;
case MK_PLUGIN_RET_EVENT_CONTINUE:
break; /* just return controller to invoker */
}
sched = mk_sched_get_thread_conf();
cs = mk_session_get(socket);
if (!cs) {
/* Check if is this a new connection for the Scheduler */
if (!mk_sched_get_connection(sched, socket)) {
MK_TRACE("[FD %i] Registering new connection");
if (mk_sched_register_client(socket, sched) == -1) {
MK_TRACE("[FD %i] Close requested", socket);
return -1;
}
/*
* New connections are not registered yet into the epoll
* event state list, we need to do it manually
*/
mk_epoll_state_set(socket,
MK_EPOLL_READ,
MK_EPOLL_LEVEL_TRIGGERED,
(EPOLLERR | EPOLLHUP | EPOLLRDHUP | EPOLLIN));
return 0;
}
/* Create session for the client */
MK_TRACE("[FD %i] Create session", socket);
cs = mk_session_create(socket, sched);
if (!cs) {
return -1;
}
}
/* Read incomming data */
ret = mk_handler_read(socket, cs);
if (ret > 0) {
if (mk_http_pending_request(cs) == 0) {
mk_epoll_change_mode(sched->epoll_fd,
socket, MK_EPOLL_WRITE, MK_EPOLL_LEVEL_TRIGGERED);
}
else if (cs->body_length + 1 >= (unsigned int) config->max_request_size) {
/*
* Request is incomplete and our buffer is full,
* close connection
*/
mk_session_remove(socket);
return -1;
}
else {
MK_TRACE("[FD %i] waiting for pending data", socket);
}
}
return ret;
}