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gprs_bssgp_rim: allow sending of encoded RIM messages 

The API function bssgp_tx_rim() accepts decoded RIM PDU structs, encodes
them and eventually sends them. However, there may be cases where the
RIM PCU already exists in its encoded form. (This is in particular the
case when the RIM PDU is forwarded from GTP to BSSGP)

Lets add an API function bssgp_tx_rim_encoded to allow sending of
already encoded RIM PDUs

Related: OS#6095
Change-Id: Id4a793bbaf32d7b9d894dcc5be3faaf2f2d91d82
This commit is contained in:
Philipp Maier 2023-08-09 16:39:06 +02:00
parent a0d84832be
commit 9e75544137
3 changed files with 21 additions and 0 deletions
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1
include/osmocom/gprs/gprs_bssgp_rim.h
View File

@ -270,3 +270,4 @@ int bssgp_parse_rim_pdu(struct bssgp_ran_information_pdu *pdu, const struct msgb
struct msgb *bssgp_encode_rim_pdu(const struct bssgp_ran_information_pdu *pdu);
int bssgp_tx_rim(const struct bssgp_ran_information_pdu *pdu, uint16_t nsei);
int bssgp_tx_rim_encoded(struct msgb *msg, uint16_t nsei);

19
src/gb/gprs_bssgp_rim.c
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@ -1179,6 +1179,25 @@ int bssgp_tx_rim(const struct bssgp_ran_information_pdu *pdu, uint16_t nsei)
return bssgp_ns_send(bssgp_ns_send_data, msg);
}
/*! Send encoded RAN TRANSPARENT CONTAINER via BSSGP (3GPP TS 29.060, section 7.7.43).
* \param[in] msg user provided memory for the encoded RAN TRANSPARENT CONTAINER to be sent.
* (this function will take ownership of msg).
* \param[in] nsei BSSGP network service entity identifier (NSEI).
* \returns 0 on sccess, -EINVAL on error. */
int bssgp_tx_rim_encoded(struct msgb *msg, uint16_t nsei)
{
struct bssgp_normal_hdr *bgph;
msgb_nsei(msg) = nsei;
msgb_bvci(msg) = 0; /* Signalling */
bgph = (struct bssgp_normal_hdr *)msgb_bssgph(msg);
DEBUGP(DLBSSGP, "BSSGP BVCI=0 NSEI=%u Tx RIM-PDU:%s\n",
nsei, bssgp_pdu_str(bgph->pdu_type));
return bssgp_ns_send(bssgp_ns_send_data, msg);
}
/* For internal use only (called from gprs_bssgp.c) */
int bssgp_rx_rim(struct msgb *msg, struct tlv_parsed *tp, uint16_t bvci)
{

1
src/gb/libosmogb.map
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@ -56,6 +56,7 @@ bssgp_tx_resume;
bssgp_tx_resume_ack;
bssgp_tx_resume_nack;
bssgp_tx_rim;
bssgp_tx_rim_encoded;
bssgp_tx_simple_bvci;
bssgp_tx_status;
bssgp_tx_suspend;