Add LLC and HLC information forwarding to MNCC interface
low/high layer compatibility are used for capability checking between
caller and called entitiy. The transcoding is performed by libosmogsm.
Related: OS#6152
Depends: libosmocore.git Ia6a2159ecf810a02f85b558026edf20b934567de
Change-Id: I760980a7e17e2fa81615adc69ef85797eb0c07f1
diff --git a/src/libmsc/gsm_04_08_cc.c b/src/libmsc/gsm_04_08_cc.c
index f6ec81b..63b1699 100644
--- a/src/libmsc/gsm_04_08_cc.c
+++ b/src/libmsc/gsm_04_08_cc.c
@@ -654,6 +654,20 @@
gsm48_decode_called(&setup.called,
TLVP_VAL(&tp, GSM48_IE_CALLED_BCD)-1);
}
+ /* low layer compatibility */
+ if (TLVP_PRESENT(&tp, GSM48_IE_LOWL_COMPAT) && TLVP_LEN(&tp, GSM48_IE_LOWL_COMPAT) > 0 &&
+ TLVP_LEN(&tp, GSM48_IE_LOWL_COMPAT) <= sizeof(setup.llc.compat)) {
+ setup.fields |= MNCC_F_LOWL_COMPAT;
+ setup.llc.len = TLVP_LEN(&tp, GSM48_IE_LOWL_COMPAT);
+ memcpy(setup.llc.compat, TLVP_VAL(&tp, GSM48_IE_LOWL_COMPAT), setup.llc.len);
+ }
+ /* high layer compatibility */
+ if (TLVP_PRESENT(&tp, GSM48_IE_HIGHL_COMPAT) && TLVP_LEN(&tp, GSM48_IE_HIGHL_COMPAT) > 0 &&
+ TLVP_LEN(&tp, GSM48_IE_HIGHL_COMPAT) <= sizeof(setup.hlc.compat)) {
+ setup.fields |= MNCC_F_HIGHL_COMPAT;
+ setup.hlc.len = TLVP_LEN(&tp, GSM48_IE_HIGHL_COMPAT);
+ memcpy(setup.hlc.compat, TLVP_VAL(&tp, GSM48_IE_HIGHL_COMPAT), setup.hlc.len);
+ }
/* user-user */
if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) {
setup.fields |= MNCC_F_USERUSER;
@@ -961,6 +975,12 @@
/* called party BCD number */
if (setup->fields & MNCC_F_CALLED)
gsm48_encode_called(msg, &setup->called);
+ /* low layer compatibility */
+ if (setup->fields & MNCC_F_LOWL_COMPAT && setup->llc.len > 0 && setup->llc.len <= sizeof(setup->llc.compat))
+ msgb_tlv_put(msg, GSM48_IE_LOWL_COMPAT, setup->llc.len, setup->llc.compat);
+ /* high layer compatibility */
+ if (setup->fields & MNCC_F_HIGHL_COMPAT && setup->hlc.len > 0 && setup->hlc.len <= sizeof(setup->hlc.compat))
+ msgb_tlv_put(msg, GSM48_IE_HIGHL_COMPAT, setup->hlc.len, setup->hlc.compat);
/* user-user */
if (setup->fields & MNCC_F_USERUSER)
gsm48_encode_useruser(msg, 0, &setup->useruser);