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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
This commit is contained in:
Andreas Eversberg 2023-12-19 12:56:44 +01:00 committed by laforge
parent 934f43bd1f
commit 79e7b7d213
1 changed files with 20 additions and 0 deletions
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20
src/libmsc/gsm_04_08_cc.c
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@ -654,6 +654,20 @@ static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg)
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 @@ static int gsm48_cc_tx_setup(struct gsm_trans *trans, void *arg)
/* 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);