modem: Initial integration of libosmo-gprs-rlcmac
This commit places code to forward unitdata LLC<->RLCMAC. Depends: libosmo-gprs.git Change-Id I1870fa6a264612c5a669bfb832e6e8c0a892cb74 Related: OS#5500 Change-Id: I0e628d9ddaa5ad6a205f07746d4176d1b8df7eb0
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53996bb3d8
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60716bcfe6
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@ -27,6 +27,7 @@ enum {
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DLUA,
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DGAPK,
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DTUN,
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DRLCMAC,
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DLLC,
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DSNDCP,
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};
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@ -1,6 +1,7 @@
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noinst_HEADERS = \
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modem.h \
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llc.h \
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rlcmac.h \
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sndcp.h \
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vty.h \
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$(NULL)
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@ -0,0 +1,8 @@
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#pragma once
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#include <stdbool.h>
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struct osmocom_ms;
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int modem_rlcmac_init(struct osmocom_ms *ms);
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@ -153,16 +153,22 @@ static const struct log_info_cat default_categories[] = {
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.color = "\033[0;37m",
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.enabled = 1, .loglevel = LOGL_NOTICE,
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},
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[DRLCMAC] = {
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.name = "DRLCMAC",
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.description = "Radio Link Control / Medium Access Control (RLC/MAC)",
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.color = "\033[0;38m",
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.enabled = 1, .loglevel = LOGL_NOTICE,
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},
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[DLLC] = {
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.name = "DLLC",
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.description = "GPRS Logical Link Control Protocol (LLC)",
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.color = "\033[0;38m",
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.color = "\033[0;39m",
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.enabled = 1, .loglevel = LOGL_NOTICE,
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},
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[DSNDCP] = {
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.name = "DSNDCP",
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.description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)",
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.color = "\033[0;39m",
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.color = "\033[0;40m",
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.enabled = 1, .loglevel = LOGL_NOTICE,
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},
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};
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@ -19,6 +19,7 @@ modem_SOURCES = \
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$(top_srcdir)/src/common/main.c \
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app_modem.c \
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llc.c \
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rlcmac.c \
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sndcp.c \
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vty.c \
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$(NULL)
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@ -48,6 +48,7 @@
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#include <osmocom/bb/common/l1l2_interface.h>
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#include <osmocom/bb/common/sysinfo.h>
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#include <osmocom/bb/common/apn.h>
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#include <osmocom/bb/modem/rlcmac.h>
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#include <osmocom/bb/modem/llc.h>
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#include <osmocom/bb/modem/sndcp.h>
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#include <osmocom/bb/modem/vty.h>
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@ -552,6 +553,11 @@ int l23_app_init(void)
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app_data.ms = osmocom_ms_alloc(l23_ctx, "1");
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OSMO_ASSERT(app_data.ms);
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if ((rc = modem_rlcmac_init(app_data.ms))) {
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LOGP(DRLCMAC, LOGL_FATAL, "Failed initializing RLC/MAC layer\n");
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return rc;
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}
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if ((rc = modem_llc_init(app_data.ms, NULL))) {
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LOGP(DLLC, LOGL_FATAL, "Failed initializing LLC layer\n");
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return rc;
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@ -33,6 +33,7 @@
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gprs/llc/llc_prim.h>
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#include <osmocom/gprs/llc/llc.h>
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#include <osmocom/gprs/rlcmac/rlcmac_prim.h>
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#include <osmocom/gprs/sndcp/sndcp_prim.h>
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#include <osmocom/bb/common/logging.h>
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@ -141,10 +142,22 @@ int modem_llc_prim_down_cb(struct osmo_gprs_llc_prim *llc_prim, void *user_data)
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const char *pdu_name = osmo_gprs_llc_prim_name(llc_prim);
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int rc = 0;
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osmo_static_assert(sizeof(struct osmo_gprs_llc_grr_prim) == sizeof(struct osmo_gprs_rlcmac_grr_prim),
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_grr_prim_size);
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switch (llc_prim->oph.sap) {
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case OSMO_GPRS_LLC_SAP_GRR:
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LOGP(DLLC, LOGL_DEBUG, "%s(): Rx %s l3=[%s]\n", __func__, pdu_name,
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LOGP(DLLC, LOGL_DEBUG, "%s(): Rx %s ll=[%s]\n", __func__, pdu_name,
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osmo_hexdump(llc_prim->grr.ll_pdu, llc_prim->grr.ll_pdu_len));
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/* Forward it to lower layers, pass ownership over to RLCMAC: */
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/* Optimization: LLC-GRR-UNITDATA-IND is 1-to-1 ABI compatible with
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RLCMAC-GRR-UNITDATA-IND, we just need to adapt the header.
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See osmo_static_assert(_grr_prim_size) above.
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*/
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llc_prim->oph.sap = OSMO_GPRS_RLCMAC_SAP_GRR;
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llc_prim->oph.primitive = OSMO_GPRS_RLCMAC_GRR_UNITDATA;
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osmo_gprs_rlcmac_prim_upper_down((struct osmo_gprs_rlcmac_prim *)llc_prim);
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rc = 1; /* Tell RLCMAC that we take ownership of the prim. */
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break;
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default:
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LOGP(DLLC, LOGL_DEBUG, "%s(): Unexpected Rx %s\n", __func__, pdu_name);
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@ -0,0 +1,138 @@
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/* GPRS RLC/MAC protocol implementation as per 3GPP TS 44.060 */
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/* (C) 2023 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
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* All Rights Reserved
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/lienses/>.
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*
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <inttypes.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/crypt/kdf.h>
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#include <osmocom/gprs/gprs_bssgp.h>
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gprs/rlcmac/rlcmac_prim.h>
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#include <osmocom/gprs/rlcmac/rlcmac.h>
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#include <osmocom/gprs/llc/llc_prim.h>
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#include <osmocom/bb/common/logging.h>
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#include <osmocom/bb/common/apn.h>
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#include <osmocom/bb/common/ms.h>
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#include <osmocom/bb/modem/rlcmac.h>
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static int modem_rlcmac_handle_grr(struct osmo_gprs_rlcmac_prim *rlcmac_prim)
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{
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int rc;
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osmo_static_assert(sizeof(struct osmo_gprs_rlcmac_grr_prim) == sizeof(struct osmo_gprs_llc_grr_prim),
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_grr_prim_size);
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switch (rlcmac_prim->oph.primitive) {
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case OSMO_GPRS_RLCMAC_GRR_UNITDATA:
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/* Forward it to upper layers, pass ownership over to LLC: */
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/* Optimization: RLCMAC-GRR-UNITDATA-IND is 1-to-1 ABI compatible with
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LLC-GRR-UNITDATA-IND, we just need to adapt the header.
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See osmo_static_assert(_grr_prim_size) above.
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*/
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rlcmac_prim->oph.sap = OSMO_GPRS_LLC_SAP_GRR;
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rlcmac_prim->oph.primitive = OSMO_GPRS_LLC_GRR_UNITDATA;
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osmo_gprs_llc_prim_lower_up((struct osmo_gprs_llc_prim *)rlcmac_prim);
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rc = 1; /* Tell RLCMAC that we take ownership of the prim. */
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break;
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case OSMO_GPRS_RLCMAC_GRR_DATA:
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default:
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LOGP(DRLCMAC, LOGL_NOTICE, "%s(): Unexpected Rx RLCMAC GRR prim %u\n",
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__func__, rlcmac_prim->oph.primitive);
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rc = -EINVAL;
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break;
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}
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return rc;
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}
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static int modem_rlcmac_handle_gmmrr(struct osmo_gprs_rlcmac_prim *rlcmac_prim)
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{
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int rc;
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switch (rlcmac_prim->oph.primitive) {
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case OSMO_GPRS_RLCMAC_GMMRR_PAGE:
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LOGP(DRLCMAC, LOGL_ERROR, "%s(): TODO: implement answering to paging indication TLLI=0x%08x\n",
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__func__, rlcmac_prim->gmmrr.page_ind.tlli);
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rc = 0;
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break;
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default:
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LOGP(DRLCMAC, LOGL_NOTICE, "%s(): Unexpected Rx RLCMAC GMMRR prim %u\n",
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__func__, rlcmac_prim->oph.primitive);
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rc = -EINVAL;
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}
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return rc;
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}
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static int modem_rlcmac_prim_up_cb(struct osmo_gprs_rlcmac_prim *rlcmac_prim, void *user_data)
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{
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const char *pdu_name = osmo_gprs_rlcmac_prim_name(rlcmac_prim);
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int rc = 0;
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switch (rlcmac_prim->oph.sap) {
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case OSMO_GPRS_RLCMAC_SAP_GRR:
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LOGP(DRLCMAC, LOGL_DEBUG, "%s(): Rx %s TLLI=0x%08x ll=[%s]\n",
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__func__, pdu_name, rlcmac_prim->grr.tlli,
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osmo_hexdump(rlcmac_prim->grr.ll_pdu, rlcmac_prim->grr.ll_pdu_len));
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rc = modem_rlcmac_handle_grr(rlcmac_prim);
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break;
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case OSMO_GPRS_RLCMAC_SAP_GMMRR:
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LOGP(DRLCMAC, LOGL_DEBUG, "%s(): Rx %s\n",
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__func__, pdu_name);
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rc = modem_rlcmac_handle_gmmrr(rlcmac_prim);
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break;
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default:
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LOGP(DRLCMAC, LOGL_NOTICE, "%s(): Unexpected Rx %s\n", __func__, pdu_name);
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OSMO_ASSERT(0);
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}
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return rc;
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}
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static int modem_rlcmac_prim_down_cb(struct osmo_gprs_rlcmac_prim *rlcmac_prim, void *user_data)
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{
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const char *pdu_name = osmo_gprs_rlcmac_prim_name(rlcmac_prim);
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int rc = 0;
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switch (rlcmac_prim->oph.sap) {
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default:
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LOGP(DRLCMAC, LOGL_DEBUG, "%s(): Unexpected Rx %s\n", __func__, pdu_name);
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OSMO_ASSERT(0);
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}
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return rc;
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}
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int modem_rlcmac_init(struct osmocom_ms *ms)
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{
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int rc;
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rc = osmo_gprs_rlcmac_init(OSMO_GPRS_RLCMAC_LOCATION_MS);
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if (rc != 0)
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return rc;
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osmo_gprs_rlcmac_set_log_cat(OSMO_GPRS_RLCMAC_LOGC_RLCMAC, DRLCMAC);
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osmo_gprs_rlcmac_prim_set_up_cb(modem_rlcmac_prim_up_cb, ms);
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osmo_gprs_rlcmac_prim_set_down_cb(modem_rlcmac_prim_down_cb, ms);
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return rc;
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}
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