diff options
Diffstat (limited to 'src/gprs_rlcmac.c')
-rw-r--r-- | src/gprs_rlcmac.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/gprs_rlcmac.c b/src/gprs_rlcmac.c new file mode 100644 index 00000000..b2cbecaa --- /dev/null +++ b/src/gprs_rlcmac.c @@ -0,0 +1,74 @@ +/* gprs_rlcmac.c + * + * Copyright (C) 2012 Ivan Klyuchnikov + * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu> + * Copyright (C) 2013 by Holger Hans Peter Freyther + * Copyright (C) 2023 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. + */ + +#include <osmocom/gsm/gsm48.h> + +#include <pcu_l1_if.h> +#include <gprs_rlcmac.h> +#include <bts.h> +#include <encoding.h> +#include <tbf.h> +#include <gprs_debug.h> + +extern void *tall_pcu_ctx; + +int gprs_rlcmac_paging_request(struct gprs_rlcmac_bts *bts, const struct osmo_mobile_identity *mi, + const char *imsi) +{ + if (log_check_level(DRLCMAC, LOGL_NOTICE)) { + char str[64]; + osmo_mobile_identity_to_str_buf(str, sizeof(str), mi); + LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Paging Request (CCCH) MI=%s\n", str); + } + struct bitvec *paging_request = bitvec_alloc(22, tall_pcu_ctx); + bitvec_unhex(paging_request, DUMMY_VEC); + int plen = write_paging_request(paging_request, mi); + if (plen <= 0) { + LOGP(DRLCMAC, LOGL_ERROR, "TX: [PCU -> BTS] Failed to encode Paging Request\n"); + return -1; + } + bts_do_rate_ctr_inc(bts, CTR_PCH_REQUESTS); + + pcu_l1if_tx_pch2(bts, paging_request, plen, false, imsi, GSM_RESERVED_TMSI); + bitvec_free(paging_request); + + return 0; +} + +/* Encode Application Information Request to Packet Application Information (3GPP TS 44.060 11.2.47) */ +struct msgb *gprs_rlcmac_app_info_msg(const struct gsm_pcu_if_app_info_req *req) { + struct msgb *msg; + uint16_t msgb_len = req->len + 1; + struct bitvec bv = {0, msgb_len, NULL}; + const enum bit_value page_mode[] = {ZERO, ZERO}; /* Normal Paging (3GPP TS 44.060 12.20) */ + + if (!req->len) { + LOGP(DRLCMAC, LOGL_ERROR, "Application Information Request with zero length received!\n"); + return NULL; + } + + msg = msgb_alloc(msgb_len, "app_info_msg"); + if (!msg) + return NULL; + + bv.data = msgb_put(msg, msgb_len); + bitvec_set_bits(&bv, page_mode, 2); + bitvec_set_uint(&bv, req->application_type, 4); + bitvec_set_bytes(&bv, req->data, req->len); + return msg; +} |