/* Create a new mqtt request instance */
struct tcp_conn *tcp_conn_add(int fd, struct flb_in_tcp_config *ctx)
{
int ret;
struct tcp_conn *conn;
struct mk_event *event;
conn = flb_malloc(sizeof(struct tcp_conn));
if (!conn) {
return NULL;
}
/* Set data for the event-loop */
event = &conn->event;
MK_EVENT_NEW(event);
event->fd = fd;
event->type = FLB_ENGINE_EV_CUSTOM;
event->handler = tcp_conn_event;
/* Connection info */
conn->fd = fd;
conn->ctx = ctx;
conn->buf_len = 0;
conn->rest = 0;
conn->status = TCP_NEW;
conn->buf_data = flb_malloc(ctx->chunk_size);
if (!conn->buf_data) {
perror("malloc");
close(fd);
flb_error("[in_tcp] could not allocate new connection");
flb_free(conn);
return NULL;
}
conn->buf_size = ctx->chunk_size;
conn->in = ctx->in;
/* Initialize JSON parser */
flb_pack_state_init(&conn->pack_state);
/* Register instance into the event loop */
ret = mk_event_add(ctx->evl, fd, FLB_ENGINE_EV_CUSTOM, MK_EVENT_READ, conn);
if (ret == -1) {
flb_error("[in_tcp] could not register new connection");
close(fd);
flb_free(conn->buf_data);
flb_free(conn);
return NULL;
}
mk_list_add(&conn->_head, &ctx->connections);
return conn;
}
/* Remove an event */
int mk_event_del(struct mk_event_loop *loop, struct mk_event *event)
{
int ret;
struct mk_event_ctx *ctx;
ctx = loop->data;
/* just remove a registered event */
if ((event->status & MK_EVENT_REGISTERED) == 0) {
return -1;
}
ret = _mk_event_del(ctx, event);
if (ret == -1) {
return -1;
}
/* Reset the status and mask */
MK_EVENT_NEW(event);
return 0;
}
static inline void thread_cb_init_vars()
{
int close;
int type = libco_param.type;
struct mk_vhost_handler *handler = libco_param.handler;
struct mk_http_session *session = libco_param.session;
struct mk_http_request *request = libco_param.request;
struct mk_thread *th = libco_param.th;
struct mk_http_thread *mth;
//struct mk_plugin *plugin;
/*
* Until this point the th->callee already set the variables, so we
* wait until the core wanted to resume so we really trigger the
* output callback.
*/
co_switch(th->caller);
if (type == MK_HTTP_THREAD_LIB) {
/* Invoke the handler callback */
handler->cb(request, handler->data);
/*
* Once the callback finished, we need to sanitize the connection
* so other further requests can be processed.
*/
int ret;
struct mk_sched_worker *sched;
struct mk_channel *channel;
channel = request->session->channel;
sched = mk_sched_get_thread_conf();
MK_EVENT_NEW(channel->event);
ret = mk_event_add(sched->loop,
channel->fd,
MK_EVENT_CONNECTION,
MK_EVENT_READ, channel->event);
if (ret == -1) {
//return -1;
}
/* Save temporal session */
mth = request->thread;
/*
* Finalize request internally, if ret == -1 means we should
* ask to shutdown the connection.
*/
ret = mk_http_request_end(session, session->server);
if (ret == -1) {
close = MK_TRUE;
}
else {
close = MK_FALSE;
}
mk_http_thread_purge(mth, close);
/* Return control to caller */
mk_thread_yield(th);
}
else if (type == MK_HTTP_THREAD_PLUGIN) {
/* FIXME: call plugin handler callback with params */
}
}
/*
* This routine perform a TCP connection and the required TLS/SSL
* handshake,
*/
FLB_INLINE int flb_io_net_tls_connect(struct flb_io_upstream *u,
struct flb_thread *th)
{
int fd;
int ret;
int error = 0;
int flag;
socklen_t len = sizeof(error);
struct flb_tls_session *session;
if (u->fd > 0) {
close(u->fd);
}
/* Create the socket */
fd = flb_net_socket_create(AF_INET, FLB_TRUE);
if (fd == -1) {
flb_error("[io] could not create socket");
return -1;
}
u->fd = fd;
/* Make the socket non-blocking */
flb_net_socket_nonblocking(u->fd);
/* Start the connection */
ret = flb_net_tcp_fd_connect(fd, u->tcp_host, u->tcp_port);
if (ret == -1) {
if (errno == EINPROGRESS) {
flb_debug("[upstream] connection in process");
}
else {
close(u->fd);
if (u->tls_session) {
tls_session_destroy(u->tls_session);
u->tls_session = NULL;
}
return -1;
}
MK_EVENT_NEW(&u->event);
u->thread = th;
ret = mk_event_add(u->evl,
fd,
FLB_ENGINE_EV_THREAD,
MK_EVENT_WRITE, &u->event);
if (ret == -1) {
/*
* If we failed here there no much that we can do, just
* let the caller we failed
*/
flb_error("[io_tls] connect failed registering event");
close(fd);
return -1;
}
/*
* Return the control to the parent caller, we need to wait for
* the event loop to get back to us.
*/
flb_thread_yield(th, FLB_FALSE);
/* Check the connection status */
if (u->event.mask & MK_EVENT_WRITE) {
ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len);
if (ret == -1) {
flb_error("[io_tls] could not validate socket status");
goto error;
}
if (error != 0) {
/* Connection is broken, not much to do here */
flb_error("[io_tls] connection failed");
goto error;
}
}
else {
return -1;
}
}
/* Configure TLS and prepare handshake */
session = u->tls_session;
mbedtls_ssl_set_bio(&session->ssl,
u,
mbedtls_net_send, mbedtls_net_recv, NULL);
retry_handshake:
ret = mbedtls_ssl_handshake(&session->ssl);
if (ret != 0) {
if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
io_tls_error(ret);
goto error;
}
if (ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
flag = MK_EVENT_WRITE;
}
else if (ret == MBEDTLS_ERR_SSL_WANT_READ) {
flag = MK_EVENT_READ;
}
else {
}
/*
* FIXME: if we need multiple reads we are invoking the same
* system call multiple times.
*/
ret = mk_event_add(u->evl,
u->event.fd,
FLB_ENGINE_EV_THREAD,
flag, &u->event);
if (ret == -1) {
goto error;
}
flb_thread_yield(th, FLB_FALSE);
goto retry_handshake;
}
else {
flb_debug("[io_tls] Handshake OK");
}
if (u->event.status == MK_EVENT_REGISTERED) {
mk_event_del(u->evl, &u->event);
}
flb_debug("[io_tls] connection OK");
return 0;
error:
if (u->event.status == MK_EVENT_REGISTERED) {
mk_event_del(u->evl, &u->event);
}
return -1;
}
