Made SICS compile again after the move to git

zwickroll.c

@@ -0,0 +1,57 @@
+/*
+ *  zwickroll.c
+ *
+ *  This is a variation of the standard AsonHandler which does not 
+ *  clear the garbage away before writing. This lead to lost data with 
+ * the zwickroll machine.
+ *
+ * This is actually a fix rather then a solution. The Zwickroll test rig
+ * sends unsolicited messages. A better way to deal with this is to store them all 
+ * in a queue which clients can inspect and consume from. Or use a callback system
+ * for processing incoming messages.   
+ *
+ *  Created on: December, 4, 2013
+ *      Author: koennecke
+ */
+#include <errno.h>
+#include <ascon.h>
+#include <ascon.i>
+
+/*-----------------------------------------------------------
+ * I am abusing the echo field as a flag if we are reading
+ * an echo char or not
+-----------------------------------------------------------*/
+static int ZwickrollHandler(Ascon *a)
+{
+  int ret, l;
+
+  switch(a->state){
+  case AsconWriting:
+    l = GetDynStringLength(a->wrBuffer) - a->wrPos;
+    ret = AsconWriteChars(a->fd, GetCharArray(a->wrBuffer) + a->wrPos, l);
+    if (ret < 0) {
+      AsconError(a, "ASC4", errno); /* sets state to AsconFailed */ 
+    } else {
+      a->wrPos += ret;
+      if (a->wrPos >= GetDynStringLength(a->wrBuffer)) {
+        a->state = AsconWriteDone;
+      }
+    }
+    break;
+  case AsconReading:
+  default:
+    return AsconStdHandler(a);
+  }
+  return 1;
+}
+/*------------------------------------------------------------------------*/
+void AddZwickrollProtocoll()
+{
+  AsconProtocol *prot = NULL;
+
+  prot = calloc(sizeof(AsconProtocol), 1);
+  prot->name = strdup("zwickroll");
+  prot->init = AsconStdInit;
+  prot->handler = ZwickrollHandler;
+  AsconInsertProtocol(prot);
+}