PentHertz
/
srsLTE
mirror of https://github.com/PentHertz/srsLTE.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

rlc_um_nr: fix unpacking of 12bit UM PDU

This commit is contained in:
Andre Puschmann 2021-02-23 22:23:33 +01:00
parent 976b5c12c1
commit 06e7f169c6
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
lib/src/upper/rlc_um_nr.cc
View File

@ -587,6 +587,11 @@ uint32_t rlc_um_nr_read_data_pdu_header(const uint8_t* payload,
header->si = (rlc_nr_si_field_t)((*ptr >> 6) & 0x03); // 2 bits SI
header->sn = (*ptr & 0x0F) << 4; // 4 bits SN
if (header->si == rlc_nr_si_field_t::full_sdu and header->sn != 0) {
fprintf(stderr, "Malformed PDU, reserved bits are set.\n");
return 0;
}
// sanity check
if (header->si == rlc_nr_si_field_t::first_segment) {
// make sure two reserved bits are not set
@ -596,9 +601,12 @@ uint32_t rlc_um_nr_read_data_pdu_header(const uint8_t* payload,
}
}
// continue unpacking remaining SN
ptr++;
header->sn |= (*ptr & 0xFF); // 8 bits SN
if (header->si != rlc_nr_si_field_t::full_sdu) {
// continue unpacking remaining SN
ptr++;
header->sn |= (*ptr & 0xFF); // 8 bits SN
}
ptr++;
} else {
fprintf(stderr, "Unsupported SN length\n");