jolly has submitted this change. ( https://gerrit.osmocom.org/c/osmo-bts/+/34519?usp=email ) Change subject: Do not prefix UI header to System Information Type 10 ...................................................................... Do not prefix UI header to System Information Type 10 System Information Type 10 uses short L2 header that is transmitted as Bter UI frame. The complete frame is sent by BSC, including short L2 header. Only the SACCH layer 1 header is added by the BTS. A switch() statement is used, so other System Information with short L2 header can be added in the future. Change-Id: Ifede42bfd84ea5914b559a20ae68f594d2ee1a5c --- M src/common/rsl.c 1 file changed, 25 insertions(+), 0 deletions(-) Approvals: fixeria: Looks good to me, but someone else must approve Jenkins Builder: Verified laforge: Looks good to me, approved diff --git a/src/common/rsl.c b/src/common/rsl.c index f11ec0e..09723be 100644 --- a/src/common/rsl.c +++ b/src/common/rsl.c @@ -993,6 +993,15 @@ * \param[in] len length of \a current in octets */ static inline void lapdm_ui_prefix(uint8_t *buf, uint32_t *valid, const uint8_t *current, uint8_t osmo_si, uint16_t len) { + /* Special case for short header SI. Do not pre-fix the two-byte UI header. */ + switch (osmo_si) { + case SYSINFO_TYPE_10: + (*valid) |= (1 << osmo_si); + memset(buf, GSM_MACBLOCK_PADDING, sizeof(sysinfo_buf_t)); + memcpy(buf, current, len); + return; + } + /* We have to pre-fix with the two-byte LAPDM UI header */ if (len > sizeof(sysinfo_buf_t) - 2) { LOGP(DRSL, LOGL_ERROR, "Truncating received SI%s (%u -> %zu) to prepend LAPDM UI header (2 bytes)\n", -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/34519?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: Ifede42bfd84ea5914b559a20ae68f594d2ee1a5c Gerrit-Change-Number: 34519 Gerrit-PatchSet: 1 Gerrit-Owner: jolly &lt;andreas(a)eversberg.eu&gt; Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: fixeria &lt;vyanitskiy(a)sysmocom.de&gt; Gerrit-Reviewer: jolly &lt;andreas(a)eversberg.eu&gt; Gerrit-Reviewer: laforge &lt;laforge(a)osmocom.org&gt; Gerrit-MessageType: merged