From 8cfd26ed1e7a8d6d151c8f43d85b5d2d39451dcd Mon Sep 17 00:00:00 2001
From: Andre Puschmann <andre@softwareradiosystems.com>
Date: Wed, 4 Apr 2018 17:11:55 +0200
Subject: [PATCH] temporary fix for issue where a RLC SDU boundary is not
 detected properly during reassembly

---
 lib/src/upper/rlc_am.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/src/upper/rlc_am.cc b/lib/src/upper/rlc_am.cc
index ea50fb7f6..3295f37d2 100644
--- a/lib/src/upper/rlc_am.cc
+++ b/lib/src/upper/rlc_am.cc
@@ -668,6 +668,13 @@ int rlc_am::build_segment(uint8_t *payload, uint32_t nof_bytes, rlc_amd_retx_t r
     lower += old_header.li[i];
   }
 
+  // Make sure LI is not deleted in case the SDU boundary is crossed
+  // FIXME: fix if N_li > 1
+  if (new_header.N_li == 1 && retx.so_start + new_header.li[0] < retx.so_end && retx.so_end <= retx.so_start + pdu_space) {
+    // This segment crosses a SDU boundary
+    new_header.N_li++;
+  }
+
   // Update retx_queue
   if(tx_window[retx.sn].buf->N_bytes == retx.so_end) {
     retx_queue.pop_front();