Changeset 10099 for fact/FADctrl/FADBoard.cc

Timestamp:

01/11/11 14:44:34 (13 years ago)

Author:

ogrimm

Message:

Corrupt events (wrong start-package flag) are removed from internal buffer

File:

• fact/FADctrl/FADBoard.cc (modified) (2 diffs)

fact/FADctrl/FADBoard.cc

@@ -182 +182 @@
 
   static char Buffer[READ_BUFFER_SIZE];
-  static unsigned int Pos = 0;
+  static unsigned int Pos = 0, Temp;
   const PEVNT_HEADER *Header = (PEVNT_HEADER *) Buffer;
   ssize_t Result;
@@ -218 +218 @@
         }
         
-        // Check if full event available in buffer
-        if (Pos < sizeof(PEVNT_HEADER) || ntohs(Header->start_package_flag) != 0xfb01) continue;
+        // Check if buffer starts with start_package_flag, remove data if not
+        Temp = 0;
+        while (ntohs(Header->start_package_flag) != 0xfb01 && Pos > 0) {
+          memmove(Buffer, Buffer+1, Pos-1);
+          Pos--;
+          Temp++;
+        }
+        if (Temp != 0) {
+          printf("Removed %d bytes because of start_package_flag not found\n", Temp);
+          continue;
+        }
+
+        // Wait until the buffer contains at least enough bytes to potentially hold a PEVNT_HEADER
+        if (Pos < sizeof(PEVNT_HEADER)) continue;
         
         unsigned int Length = ntohs(Header->package_length)*2*sizeof(char);