1 files changed, 34 insertions, 0 deletions

diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..b5b7f1d
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,34 @@
+#ifndef IO_H
+#define IO_H
+
+#include "error.h"
+
+/* interface to send function */
+typedef int (*p_send) (
+    void *ctx,          /* context needed by send */ 
+    const char *data,   /* pointer to buffer with data to send */
+    size_t count,       /* number of bytes to send from buffer */
+    size_t *sent,       /* number of bytes sent uppon return */
+    int timeout         /* number of miliseconds left for transmission */
+);
+ 
+/* interface to recv function */
+typedef int (*p_recv) (
+    void *ctx,          /* context needed by recv */ 
+    char *data,         /* pointer to buffer where data will be writen */
+    size_t count,       /* number of bytes to receive into buffer */
+    size_t *got,        /* number of bytes received uppon return */
+    int timeout         /* number of miliseconds left for transmission */
+);
+
+/* IO driver definition */
+typedef struct t_io_ {
+    void *ctx;          /* context needed by send/recv */
+    p_send send;        /* send function pointer */
+    p_recv recv;        /* receive function pointer */
+} t_io;
+typedef t_io *p_io;
+
+void io_init(p_io io, p_send send, p_recv recv, void *ctx);
+
+#endif /* IO_H */