From 6a02264af6fb828098491b666a432c570e507fd4 Mon Sep 17 00:00:00 2001
From: Dhanya Thattil <dhanya.thattil@psi.ch>
Date: Fri, 28 Jan 2022 11:52:07 +0100
Subject: [PATCH] fix for 1g udp interface framenumber being set

---
 .../slsDetectorServer/src/UDPPacketHeaderGenerator.c           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/slsDetectorServers/slsDetectorServer/src/UDPPacketHeaderGenerator.c b/slsDetectorServers/slsDetectorServer/src/UDPPacketHeaderGenerator.c
index 0bc2e6d43..660866e6f 100644
--- a/slsDetectorServers/slsDetectorServer/src/UDPPacketHeaderGenerator.c
+++ b/slsDetectorServers/slsDetectorServer/src/UDPPacketHeaderGenerator.c
@@ -34,7 +34,8 @@ uint32_t getUDPPacketNumber() { return udpPacketNumber; }
 uint64_t getUDPFrameNumber() { return udpFrameNumber; }
 void setUDPFrameNumber(uint64_t fnum) {
     LOG(logINFO, ("Setting next frame number also for 1g to %lld\n", fnum));
-    udpFrameNumber = fnum;
+    // this gets incremented before setting it
+    udpFrameNumber = fnum - 1;
 }
 
 void createUDPPacketHeader(char *buffer, uint16_t id) {