diff --git a/machinarium/machinarium.h b/machinarium/machinarium.h
index d113b8e5..5b53a945 100644
--- a/machinarium/machinarium.h
+++ b/machinarium/machinarium.h
@@ -20,6 +20,7 @@
 typedef void (*mmfunction_t)(void *arg);
 
 typedef void* mm_t;
+typedef void* mmio_t;
 
 MM_API mm_t
 mm_new(void);
@@ -34,4 +35,10 @@ MM_API void    mm_sleep(mm_t, uint64_t time_ms);
 MM_API int     mm_wait(mm_t, uint64_t id);
 MM_API int     mm_cancel(mm_t, uint64_t id);
 
+MM_API mmio_t
+mm_io_new(mm_t);
+
+MM_API void    mm_close(mmio_t);
+MM_API int     mm_fd(mmio_t);
+
 #endif
diff --git a/machinarium/machinarium_private.h b/machinarium/machinarium_private.h
index 0e27035f..f0ef7537 100644
--- a/machinarium/machinarium_private.h
+++ b/machinarium/machinarium_private.h
@@ -29,5 +29,6 @@
 #include "mm_fiber.h"
 #include "mm_scheduler.h"
 #include "mm.h"
+#include "mm_io.h"
 
 #endif
diff --git a/machinarium/makefile b/machinarium/makefile
index 405eb98c..3014a98d 100644
--- a/machinarium/makefile
+++ b/machinarium/makefile
@@ -7,7 +7,8 @@ CFLAGS  = -I. -Wall -g -O0 -pedantic
 OBJECTS = mm_context.o \
           mm_fiber.o \
           mm_scheduler.o \
-          mm.o
+          mm.o \
+          mm_io.o
 LIB     = libmachinarium.a
 $(LIB): clean $(OBJECTS)
 	$(AR) cr $(LIB) $(OBJECTS)
diff --git a/machinarium/mm_io.c b/machinarium/mm_io.c
new file mode 100644
index 00000000..b4251536
--- /dev/null
+++ b/machinarium/mm_io.c
@@ -0,0 +1,81 @@
+
+/*
+ * machinarium.
+ *
+ * Cooperative multitasking engine.
+*/
+
+#include <machinarium_private.h>
+#include <machinarium.h>
+
+MM_API mmio_t
+mm_io_new(mm_t envp)
+{
+	mm *env = envp;
+	mmio *io = malloc(sizeof(*io));
+	if (io == NULL)
+		return NULL;
+	/* tcp */
+	io->fd = -1;
+	io->f = env;
+	uv_tcp_init(&env->loop, &io->handle);
+	io->handle.data = io;
+	/* connect */
+	memset(&io->connect, 0, sizeof(io->connect));
+	uv_timer_init(&env->loop, &io->connect_timer);
+	io->connect.data = io;
+	io->connect_timer.data = io;
+	io->connect_timeout = 0;
+	io->connect_status = 0;
+	io->connected  = 0;
+	io->connect_fiber = NULL;
+	/* accept */
+	io->accept_status = 0;
+	io->accept_fiber = NULL;
+	/* read */
+	mm_bufinit(&io->read_buf);
+	uv_timer_init(&env->loop, &io->read_timer);
+	io->read_timer.data = io;
+	io->read_size = 0;
+	io->read_status = 0;
+	io->read_timeout = 0;
+	io->read_eof = 0;
+	io->read_fiber = NULL;
+	/* write */
+	memset(&io->write, 0, sizeof(io->write));
+	uv_timer_init(&env->loop, &io->write_timer);
+	io->write.data = io;
+	io->write_timer.data = io;
+	io->write_timeout = 0;
+	io->write_fiber = NULL;
+	io->write_status = 0;
+	return io;
+}
+
+MM_API void
+mm_close(mmio_t iop)
+{
+	mmio *io = iop;
+
+	if (! uv_is_closing((uv_handle_t*)&io->connect_timer))
+		uv_close((uv_handle_t*)&io->connect_timer, NULL);
+
+	if (! uv_is_closing((uv_handle_t*)&io->read_timer))
+		uv_close((uv_handle_t*)&io->read_timer, NULL);
+
+	if (! uv_is_closing((uv_handle_t*)&io->write_timer))
+		uv_close((uv_handle_t*)&io->write_timer, NULL);
+
+	if (! uv_is_closing((uv_handle_t*)&io->handle))
+		uv_close((uv_handle_t*)&io->handle, NULL);
+
+	mm_buffree(&io->read_buf);
+	free(io);
+}
+
+MM_API int
+mm_fd(mmio_t iop)
+{
+	mmio *io = iop;
+	return io->fd;
+}
diff --git a/machinarium/mm_io.h b/machinarium/mm_io.h
new file mode 100644
index 00000000..196a47bf
--- /dev/null
+++ b/machinarium/mm_io.h
@@ -0,0 +1,58 @@
+#ifndef MM_IO_H_
+#define MM_IO_H_
+
+/*
+ * machinarium.
+ *
+ * Cooperative multitasking engine.
+*/
+
+typedef struct mmio mmio;
+
+struct mmio {
+	uv_os_sock_t  fd;
+	uv_tcp_t      handle;
+	mm           *f;
+	/* connect */
+	uv_timer_t    connect_timer;
+	uv_connect_t  connect;
+	int           connect_timeout;
+	int           connected;
+	int           connect_status;
+	mmfiber      *connect_fiber;
+	/* accept */
+	int           accept_status;
+	mmfiber      *accept_fiber;
+	/* read */
+	uv_timer_t    read_timer;
+	mmbuf         read_buf;
+	int           read_size;
+	int           read_timeout;
+	int           read_eof;
+	int           read_status;
+	mmfiber      *read_fiber;
+	/* write */
+	uv_timer_t    write_timer;
+	uv_write_t    write;
+	int           write_timeout;
+	int           write_status;
+	mmfiber      *write_fiber;
+};
+
+static inline void
+mm_io_timer_start(uv_timer_t *timer, uv_timer_cb callback, uint64_t time_ms)
+{
+	if (time_ms > 0)
+		uv_timer_start(timer, callback, time_ms, 0);
+}
+
+static inline void
+mm_io_timer_stop(uv_timer_t *timer)
+{
+	uv_timer_stop(timer);
+	uv_handle_t *handle = (uv_handle_t*)timer;
+	if (! uv_is_closing(handle))
+		uv_close(handle, NULL);
+}
+
+#endif