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trxcon/trx_if: send NOPE indications if there is no burst 

In a typical setup operating on the real radio interface, it's
the duty of the transceiver (e.g. osmo-trx) to send NOPE.ind to
the L1 implementation (e.g. osmo-bts-trx).  However, in a
virtual environment for ttcn3-bts-test we use a fake transceiver,
which due to its simplicity cannot send NOPE indications itself.

The lack of queues and buffering does not allow us to implement
NOPE indications in fake_trx.py, so the easiest approach is to
generate them from trxcon.  Send TRXD PDUs without the burst bits,
and fake_trx.py will tranform them info NOPE.ind for us.

Change-Id: I1c7f1315b8ef44f651efd6a22fb5b854f65c0946
Related: SYS#5313, OS#1569
This commit is contained in:
Vadim Yanitskiy 2021-06-14 23:30:52 +02:00
parent 529d54b13a
commit f8bc28505f
1 changed files with 4 additions and 5 deletions
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9
src/host/trxcon/trx_if.c
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@ -635,9 +635,6 @@ int trx_if_tx_burst(struct trx_instance *trx,
uint8_t buf[TRXD_BUF_SIZE];
size_t length;
if (br->burst_len == 0)
return 0;
/**
* We must be sure that we have clock,
* and we have sent all control data
@ -662,8 +659,10 @@ int trx_if_tx_burst(struct trx_instance *trx,
length = 6;
/* Copy ubits {0,1} */
memcpy(buf + 6, br->burst, br->burst_len);
length += br->burst_len;
if (br->burst_len != 0) {
memcpy(buf + 6, br->burst, br->burst_len);
length += br->burst_len;
}
/* Send data to transceiver */
send(trx->trx_ofd_data.fd, buf, length, 0);