mirror of https://github.com/pvnis/srsRAN_4G.git
mac_pdu: fix check of remaining length when adding new subheader to MAC PDU
when adding a new subheader to a MAC PDU we should only add the subheader if at least 2 bytes are left in the PDU. Even a 1 Byte MAC Control Element requires another byte to pack the subheader. This fixes #1424 in which a 3 B MAC opportunity is provided in the UL. After adding the Short BSR, we tried to add another MAC subheader. Adding the subheader succeeded even though no space is left to add a single byte. With this patch, adding the subheader fails and the generates MAC PDU is correct.master
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