--- a/fuzz-common.c	Thu May 25 22:21:23 2017 +0800
+++ b/fuzz-common.c	Thu May 25 22:21:49 2017 +0800
@@ -31,23 +31,7 @@
 
     memset(&ses, 0x0, sizeof(ses));
     memset(&svr_ses, 0x0, sizeof(svr_ses));
-
-    // get prefix. input format is
-    // string prefix
-    //     uint32 wrapfd seed
-    //     ... to be extended later
-    // [bytes] ssh input stream
-
-    // be careful to avoid triggering buffer.c assertions
-    if (fuzz.input->len < 8) {
-        return DROPBEAR_FAILURE;
-    }
-    size_t prefix_size = buf_getint(fuzz.input);
-    if (prefix_size != 4) {
-        return DROPBEAR_FAILURE;
-    }
-    uint32_t wrapseed = buf_getint(fuzz.input);
-    wrapfd_setup(wrapseed);
+    wrapfd_setup();
 
     fuzz_seed();