fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmo-gprs/+/31950 ) Change subject: rlcmac: do not attempt to decode PTCCH/D blocks, discard them ...................................................................... rlcmac: do not attempt to decode PTCCH/D blocks, discard them PTCCH/D blocks use different encoding than PDTCH/D blocks, and passing them to gprs_rlcmac_handle_gprs_dl_block() results in decoding errors: DRLCMAC NOTICE rlcmac.c:496 Failed decoding dl ctrl block: 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 2b 2b 2b 2b 2b 2b 2b We don't implement PTCCH yet, so discard these blocks starting at Fn=12 within the period of 104 frames (see 3GPP 45.002, table 6). Change-Id: I555004987cf2daa995b9ea21c90ac699199c4e9a --- M src/rlcmac/rlcmac_prim.c 1 file changed, 24 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmo-gprs refs/changes/50/31950/1 diff --git a/src/rlcmac/rlcmac_prim.c b/src/rlcmac/rlcmac_prim.c index 4bcd925..8f27ff7 100644 --- a/src/rlcmac/rlcmac_prim.c +++ b/src/rlcmac/rlcmac_prim.c @@ -491,6 +491,12 @@ return -EINVAL; } + /* TODO: handle PTCCH/D (Packet Timing Control CHannel) blocks */ + if ((rlcmac_prim->l1ctl.pdch_data_ind.fn % 104) == 12) { + LOGRLCMAC(LOGL_DEBUG, "Dropping PTCCH/D block (not implemented)\n"); + return 0; + } + if (gprs_rlcmac_mcs_is_gprs(cs)) return gprs_rlcmac_handle_gprs_dl_block(rlcmac_prim, cs); -- To view, visit https://gerrit.osmocom.org/c/libosmo-gprs/+/31950 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmo-gprs Gerrit-Branch: master Gerrit-Change-Id: I555004987cf2daa995b9ea21c90ac699199c4e9a Gerrit-Change-Number: 31950 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria <vyanitskiy@sysmocom.de> Gerrit-MessageType: newchange