Initial handling support for RIM messages
This code doesn't do anything yet app-related with the received RIM messages, but already provides the initial infrastructure to handle them in the future, and does first checkings. Related: SYS#5103 Change-Id: Ia0ade0e97ea781ec655439c008b6cefaf3e90dec
This commit is contained in:
parent
db5e339da4
commit
3a27102e59
|
@ -43,6 +43,7 @@ libgprs_la_SOURCES = \
|
|||
csn1.c \
|
||||
gsm_rlcmac.c \
|
||||
gprs_bssgp_pcu.c \
|
||||
gprs_bssgp_rim.c \
|
||||
gprs_rlcmac.cpp \
|
||||
gprs_rlcmac_sched.cpp \
|
||||
gprs_rlcmac_meas.cpp \
|
||||
|
@ -81,6 +82,7 @@ noinst_HEADERS = \
|
|||
csn1.h \
|
||||
gsm_rlcmac.h \
|
||||
gprs_bssgp_pcu.h \
|
||||
gprs_bssgp_rim.h \
|
||||
gprs_rlcmac.h \
|
||||
gprs_ms.h \
|
||||
gprs_ms_storage.h \
|
||||
|
|
|
@ -20,6 +20,7 @@
|
|||
|
||||
#include <gprs_rlcmac.h>
|
||||
#include <gprs_bssgp_pcu.h>
|
||||
#include <gprs_bssgp_rim.h>
|
||||
#include <pcu_l1_if.h>
|
||||
#include <gprs_debug.h>
|
||||
#include <bts.h>
|
||||
|
@ -419,10 +420,22 @@ static int gprs_bssgp_pcu_rcvmsg(struct msgb *msg)
|
|||
int rc = 0;
|
||||
struct bssgp_bvc_ctx *bctx;
|
||||
|
||||
if (pdu_type == BSSGP_PDUT_STATUS)
|
||||
switch (pdu_type) {
|
||||
case BSSGP_PDUT_STATUS:
|
||||
/* Pass the message to the generic BSSGP parser, which handles
|
||||
* STATUS and RESET messages in either direction. */
|
||||
case BSSGP_PDUT_RAN_INFO:
|
||||
case BSSGP_PDUT_RAN_INFO_REQ:
|
||||
case BSSGP_PDUT_RAN_INFO_ACK:
|
||||
case BSSGP_PDUT_RAN_INFO_ERROR:
|
||||
case BSSGP_PDUT_RAN_INFO_APP_ERROR:
|
||||
/* Also pass all RIM related messages to the generic BSSGP
|
||||
* parser so that it can deliver primitive to the RIM SAP
|
||||
* (SAP_BSSGP_RIM) */
|
||||
return bssgp_rcvmsg(msg);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* Identifiers from DOWN: NSEI, BVCI (both in msg->cb) */
|
||||
|
||||
|
@ -552,6 +565,8 @@ int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
|
|||
if (oph->primitive == PRIM_NM_STATUS)
|
||||
handle_nm_status(bp);
|
||||
break;
|
||||
case SAP_BSSGP_RIM:
|
||||
return handle_rim(bp);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
|
|
@ -0,0 +1,169 @@
|
|||
/* gprs_bssgp_pcu.cpp
|
||||
*
|
||||
* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <osmocom/gprs/gprs_bssgp.h>
|
||||
#include <osmocom/gprs/gprs_bssgp_rim.h>
|
||||
#include <osmocom/core/msgb.h>
|
||||
#include <osmocom/gsm/tlv.h>
|
||||
#include <osmocom/gprs/gprs_ns.h>
|
||||
#include <osmocom/core/prim.h>
|
||||
|
||||
#include "gprs_debug.h"
|
||||
#include "gprs_pcu.h"
|
||||
|
||||
#define LOGPRIM(nsei, level, fmt, args...) \
|
||||
LOGP(DRIM, level, "(NSEI=%u) " fmt, nsei, ## args)
|
||||
|
||||
static inline void gprs_ra_id_ci_to_cgi_ps(struct osmo_cell_global_id_ps *cgi_ps,
|
||||
const struct gprs_ra_id *raid, uint16_t cid)
|
||||
{
|
||||
*cgi_ps = (struct osmo_cell_global_id_ps) {
|
||||
.rai.lac.plmn.mcc = raid->mcc,
|
||||
.rai.lac.plmn.mnc = raid->mnc,
|
||||
.rai.lac.plmn.mnc_3_digits = raid->mnc_3_digits,
|
||||
.rai.lac.lac = raid->lac,
|
||||
.rai.rac = raid->rac,
|
||||
.cell_identity = cid,
|
||||
};
|
||||
}
|
||||
|
||||
/* Mirror RIM routing information of a given PDU, see also 3GPP TS 48.018, section 8c.1.4.3 */
|
||||
static void mirror_rim_routing_info(struct bssgp_ran_information_pdu *to_pdu,
|
||||
const struct bssgp_ran_information_pdu *from_pdu)
|
||||
{
|
||||
memcpy(&to_pdu->routing_info_dest, &from_pdu->routing_info_src, sizeof(to_pdu->routing_info_dest));
|
||||
memcpy(&to_pdu->routing_info_src, &from_pdu->routing_info_dest, sizeof(to_pdu->routing_info_src));
|
||||
}
|
||||
|
||||
/* Format a RAN INFORMATION ERROR PDU */
|
||||
static void format_response_pdu_err(struct bssgp_ran_information_pdu *resp_pdu,
|
||||
const struct bssgp_ran_information_pdu *req_pdu)
|
||||
{
|
||||
memset(resp_pdu, 0, sizeof(*resp_pdu));
|
||||
mirror_rim_routing_info(resp_pdu, req_pdu);
|
||||
|
||||
resp_pdu->decoded.err_rim_cont = (struct bssgp_ran_inf_err_rim_cont) {
|
||||
.app_id = BSSGP_RAN_INF_APP_ID_NACC,
|
||||
.prot_ver = 1,
|
||||
.err_pdu = req_pdu->rim_cont,
|
||||
.err_pdu_len = req_pdu->rim_cont_len,
|
||||
};
|
||||
|
||||
resp_pdu->decoded_present = true;
|
||||
resp_pdu->rim_cont_iei = BSSGP_IE_RI_ERROR_RIM_COINTAINER;
|
||||
}
|
||||
|
||||
/* Check if the application ID in the request PDU is actually BSSGP_RAN_INF_APP_ID_NACC */
|
||||
static const enum bssgp_ran_inf_app_id *get_app_id(const struct bssgp_ran_information_pdu *pdu)
|
||||
{
|
||||
switch (pdu->rim_cont_iei) {
|
||||
case BSSGP_IE_RI_REQ_RIM_CONTAINER:
|
||||
return &pdu->decoded.req_rim_cont.app_id;
|
||||
case BSSGP_IE_RI_RIM_CONTAINER:
|
||||
return &pdu->decoded.rim_cont.app_id;
|
||||
case BSSGP_IE_RI_APP_ERROR_RIM_CONT:
|
||||
return &pdu->decoded.app_err_rim_cont.app_id;
|
||||
case BSSGP_IE_RI_ACK_RIM_CONTAINER:
|
||||
return &pdu->decoded.ack_rim_cont.app_id;
|
||||
case BSSGP_IE_RI_ERROR_RIM_COINTAINER:
|
||||
return &pdu->decoded.err_rim_cont.app_id;
|
||||
default:
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check if the application ID in the request PDU is of a certain type */
|
||||
static bool match_app_id(const struct bssgp_ran_information_pdu *pdu, enum bssgp_ran_inf_app_id exp_app_id)
|
||||
{
|
||||
const enum bssgp_ran_inf_app_id *app_id = get_app_id(pdu);
|
||||
if (app_id && *app_id == exp_app_id)
|
||||
return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
int handle_rim(struct osmo_bssgp_prim *bp)
|
||||
{
|
||||
struct msgb *msg = bp->oph.msg;
|
||||
uint16_t nsei = msgb_nsei(msg);
|
||||
struct bssgp_ran_information_pdu *pdu = &bp->u.rim_pdu;
|
||||
struct bssgp_ran_information_pdu resp_pdu;
|
||||
struct osmo_cell_global_id_ps dst_addr;
|
||||
struct gprs_rlcmac_bts *bts;
|
||||
|
||||
OSMO_ASSERT (bp->oph.sap == SAP_BSSGP_RIM);
|
||||
|
||||
/* At the moment we only support GERAN, so we block all other network
|
||||
* types here. */
|
||||
if (pdu->routing_info_dest.discr != BSSGP_RIM_ROUTING_INFO_GERAN) {
|
||||
LOGPRIM(nsei, LOGL_ERROR,
|
||||
"Only GERAN supported, destination cell is not a GERAN cell -- rejected.\n");
|
||||
return bssgp_tx_status(BSSGP_CAUSE_UNKN_RIM_AI, NULL, msg);
|
||||
}
|
||||
|
||||
/* Check if the RIM pdu is really addressed to this PCU. In case we
|
||||
* receive a RIM PDU for a cell that is not parented by this PCU we
|
||||
* are supposed to reject it with a BSSGP STATUS.
|
||||
* see also: 3GPP TS 48.018, section 8c.3.1.2 */
|
||||
gprs_ra_id_ci_to_cgi_ps(&dst_addr, &pdu->routing_info_dest.geran.raid,
|
||||
pdu->routing_info_dest.geran.cid);
|
||||
bts = gprs_pcu_get_bts_by_cgi_ps(the_pcu, &dst_addr);
|
||||
if (!bts) {
|
||||
LOGPRIM(nsei, LOGL_ERROR, "Cell %s unknown to this pcu\n",
|
||||
osmo_cgi_ps_name(&dst_addr));
|
||||
return bssgp_tx_status(BSSGP_CAUSE_UNKN_DST, NULL, msg);
|
||||
}
|
||||
|
||||
/* Check if the incoming RIM PDU is parseable, if not we must report
|
||||
* an error to the controlling BSS 3GPP TS 48.018, 8c.3.4 and 8c.3.4.2 */
|
||||
if (!pdu->decoded_present) {
|
||||
LOGPRIM(nsei, LOGL_ERROR, "Errornous RIM PDU received -- rejected.\n");
|
||||
format_response_pdu_err(&resp_pdu, pdu);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Check if the RIM container inside the incoming RIM PDU has the correct
|
||||
* application ID */
|
||||
if (!match_app_id(pdu, BSSGP_RAN_INF_APP_ID_NACC)) {
|
||||
LOGPRIM(nsei, LOGL_ERROR, "RIM PDU with unknown/wrong application ID received -- rejected.\n");
|
||||
format_response_pdu_err(&resp_pdu, pdu);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Handle incoming RIM container */
|
||||
switch (pdu->rim_cont_iei) {
|
||||
case BSSGP_IE_RI_REQ_RIM_CONTAINER:
|
||||
LOGPRIM(nsei, LOGL_NOTICE, "Responding to RAN INFORMATION REQUEST not yet implemented!\n");
|
||||
break;
|
||||
case BSSGP_IE_RI_RIM_CONTAINER:
|
||||
LOGPRIM(nsei, LOGL_NOTICE, "Responding to RAN INFORMATION not yet implemented!\n");
|
||||
break;
|
||||
case BSSGP_IE_RI_APP_ERROR_RIM_CONT:
|
||||
case BSSGP_IE_RI_ACK_RIM_CONTAINER:
|
||||
case BSSGP_IE_RI_ERROR_RIM_COINTAINER:
|
||||
LOGPRIM(nsei, LOGL_ERROR, "RIM PDU not handled by this application\n");
|
||||
return -EINVAL;
|
||||
default:
|
||||
/* This should never happen. If the RIM PDU is parsed correctly, then the rim_cont_iei will
|
||||
* be set to one of the cases above and if parsing fails this switch statement is guarded
|
||||
* by the check on decoded_present above */
|
||||
OSMO_ASSERT(false);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,24 @@
|
|||
/* gprs_bssgp_rim.h
|
||||
*
|
||||
* Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version 2
|
||||
* of the License, or (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
struct osmo_bssgp_prim;
|
||||
|
||||
int handle_rim(struct osmo_bssgp_prim *bp);
|
|
@ -119,6 +119,13 @@ static const struct log_info_cat default_categories[] = {
|
|||
.loglevel = LOGL_NOTICE,
|
||||
.enabled = 1,
|
||||
},
|
||||
[DRIM] = {
|
||||
.name = "DRIM",
|
||||
.color = "\033[1;38m",
|
||||
.description = "RAN Information Management (RIM)",
|
||||
.loglevel = LOGL_NOTICE,
|
||||
.enabled = 1,
|
||||
},
|
||||
};
|
||||
|
||||
static int filter_fn(const struct log_context *ctx,
|
||||
|
|
|
@ -46,6 +46,7 @@ enum {
|
|||
DTBFUL,
|
||||
DNS,
|
||||
DPCU,
|
||||
DRIM,
|
||||
aDebug_LastEntry
|
||||
};
|
||||
|
||||
|
|
|
@ -116,6 +116,16 @@ struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_nr(struct gprs_pcu *pcu, uint8_t bts
|
|||
return NULL;
|
||||
}
|
||||
|
||||
struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_cgi_ps(struct gprs_pcu *pcu, struct osmo_cell_global_id_ps *cgi_ps)
|
||||
{
|
||||
struct gprs_rlcmac_bts *pos;
|
||||
llist_for_each_entry(pos, &pcu->bts_list, list) {
|
||||
if (memcmp(&pos->cgi_ps, cgi_ps, sizeof(*cgi_ps)) == 0)
|
||||
return pos;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void gprs_pcu_set_initial_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul)
|
||||
{
|
||||
struct gprs_rlcmac_bts *bts;
|
||||
|
|
|
@ -124,6 +124,7 @@ extern struct gprs_pcu *the_pcu;
|
|||
struct gprs_pcu *gprs_pcu_alloc(void *ctx);
|
||||
|
||||
struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_nr(struct gprs_pcu *pcu, uint8_t bts_nr);
|
||||
struct gprs_rlcmac_bts *gprs_pcu_get_bts_by_cgi_ps(struct gprs_pcu *pcu, struct osmo_cell_global_id_ps *cgi_ps);
|
||||
|
||||
void gprs_pcu_set_initial_cs(struct gprs_pcu *pcu, uint8_t cs_dl, uint8_t cs_ul);
|
||||
void gprs_pcu_set_initial_mcs(struct gprs_pcu *pcu, uint8_t mcs_dl, uint8_t mcs_ul);
|
||||
|
|
Loading…
Reference in New Issue