falconia has submitted this change. ( https://gerrit.osmocom.org/c/osmo-hlr/+/34450?usp=email )

(

2 is the latest approved patch-set. No files were changed between the latest approved patch-set and the submitted one. )Change subject: SMS over GSUP: implement forwarding of MT SMS ......................................................................

SMS over GSUP: implement forwarding of MT SMS

When an SMSC tries to deliver an SM to a subscriber, it will send us an MT-forwardSM.req GSUP message. We look up the subscriber by IMSI and see if they are attached to a VLR. If the subscriber is attached, we forward the message to the MSC/VLR, otherwise return an error to the SMSC.

Related: OS#6135 Change-Id: Ib3551bf7839690606c677461758c5cfef5f0aa7b --- M include/osmocom/hlr/hlr_sms.h M src/hlr.c M src/hlr_sms.c 3 files changed, 48 insertions(+), 0 deletions(-)

Approvals: Jenkins Builder: Verified fixeria: Looks good to me, but someone else must approve pespin: Looks good to me, but someone else must approve laforge: Looks good to me, approved

diff --git a/include/osmocom/hlr/hlr_sms.h b/include/osmocom/hlr/hlr_sms.h index 727e408..e6e476e 100644 --- a/include/osmocom/hlr/hlr_sms.h +++ b/include/osmocom/hlr/hlr_sms.h @@ -29,3 +29,4 @@ void smsc_route_free(struct hlr_smsc_route *rt);

void forward_mo_sms(struct osmo_gsup_req *req); +void forward_mt_sms(struct osmo_gsup_req *req); diff --git a/src/hlr.c b/src/hlr.c index 501eabc..eae9e84 100644 --- a/src/hlr.c +++ b/src/hlr.c @@ -560,6 +560,9 @@ case OSMO_GSUP_MSGT_MO_FORWARD_SM_REQUEST: forward_mo_sms(req); break; + case OSMO_GSUP_MSGT_MT_FORWARD_SM_REQUEST: + forward_mt_sms(req); + break; default: LOGP(DMAIN, LOGL_DEBUG, "Unhandled GSUP message type %s\n", osmo_gsup_message_type_name(req->gsup.message_type)); diff --git a/src/hlr_sms.c b/src/hlr_sms.c index 672d6c9..c8c8e49 100644 --- a/src/hlr_sms.c +++ b/src/hlr_sms.c @@ -190,3 +190,31 @@ strlen(smsc->name) + 1); osmo_gsup_forward_to_local_peer(req->cb_data, &dest_peer, req, NULL); } + +/*********************************************************************** + * forwarding of MT SMS from SMSCs to MSC/VLR based on IMSI + ***********************************************************************/ + +void forward_mt_sms(struct osmo_gsup_req *req) +{ + struct hlr_subscriber subscr; + struct osmo_cni_peer_id dest_peer; + int rc; + + rc = db_subscr_get_by_imsi(g_hlr->dbc, req->gsup.imsi, &subscr); + if (rc < 0) { + osmo_gsup_req_respond_err(req, GMM_CAUSE_IMSI_UNKNOWN, + "IMSI unknown"); + return; + } + /* is this subscriber currently attached to a VLR? */ + if (!subscr.vlr_number[0]) { + osmo_gsup_req_respond_err(req, GMM_CAUSE_IMPL_DETACHED, + "subscriber not attached to a VLR"); + return; + } + osmo_cni_peer_id_set(&dest_peer, OSMO_CNI_PEER_ID_IPA_NAME, + (const uint8_t *) subscr.vlr_number, + strlen(subscr.vlr_number) + 1); + osmo_gsup_forward_to_local_peer(req->cb_data, &dest_peer, req, NULL); +}