Factoring code
diff --git a/tests/fuzz/common.h b/tests/fuzz/common.h
index 03dc2a4..5586c06 100644
--- a/tests/fuzz/common.h
+++ b/tests/fuzz/common.h
@@ -1,4 +1,19 @@
 #include "mbedtls/platform_time.h"
+#include <stdint.h>
+
+typedef struct fuzzBufferOffset
+{
+    const uint8_t *Data;
+    size_t Size;
+    size_t Offset;
+} fuzzBufferOffset_t;
 
 mbedtls_time_t dummy_constant_time( mbedtls_time_t* time );
 void dummy_init();
+
+int dummy_send( void *ctx, const unsigned char *buf, size_t len );
+int fuzz_recv( void *ctx, unsigned char *buf, size_t len );
+int dummy_random( void *p_rng, unsigned char *output, size_t output_len );
+int dummy_entropy( void *data, unsigned char *output, size_t len );
+int fuzz_recv_timeout( void *ctx, unsigned char *buf, size_t len,
+                      uint32_t timeout );