minor fix for UPF

55b6f1ce · Tien-Thinh Nguyen · c7927169 · 55b6f1ce
Commit 55b6f1ce authored Jul 29, 2020 by Tien-Thinh Nguyen
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src/spgwu/simpleswitch/spgwu_s1u.cpp src/spgwu/simpleswitch/spgwu_s1u.cpp +5 -0

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--- a/src/spgwu/simpleswitch/spgwu_s1u.cpp
+++ b/src/spgwu/simpleswitch/spgwu_s1u.cpp
@@ -120,6 +120,11 @@ void spgwu_s1u::handle_receive(char* recv_buffer, const std::size_t bytes_transf
        gtp_payload_offset += 4;
        gtp_payload_length -= 4;
      }
+      if (gtp_flags & 0x04) {
+        gtp_payload_offset += 4;
+        gtp_payload_length -= 4;
+      }
+
      uint32_t tunnel_id = be32toh(gtpuh->teid);

      struct iphdr* iph = (struct iphdr*)&recv_buffer[gtp_payload_offset];