diff options
author | Harald Welte <laforge@gnumonks.org> | 2010-05-04 07:41:59 +0200 |
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committer | Harald Welte <laforge@gnumonks.org> | 2010-05-04 07:41:59 +0200 |
commit | e236596bf42aec7520f2d7a879bb8d2aef7afad0 (patch) | |
tree | 5db2e10e93509491e0c1a55f05ee52bbc80235b1 /openbsc/src/gprs/gprs_sndcp.c | |
parent | ce662943f3a0d49606ca6563aa700b2660abe3d4 (diff) |
[gprs] Move all GPRS related code to src/gprs subdirectory
Diffstat (limited to 'openbsc/src/gprs/gprs_sndcp.c')
-rw-r--r-- | openbsc/src/gprs/gprs_sndcp.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_sndcp.c b/openbsc/src/gprs/gprs_sndcp.c new file mode 100644 index 000000000..0d1a39004 --- /dev/null +++ b/openbsc/src/gprs/gprs_sndcp.c @@ -0,0 +1,70 @@ +/* GPRS SNDCP protocol implementation as per 3GPP TS 04.65 */ + +/* (C) 2010 by Harald Welte <laforge@gnumonks.org> + * + * All Rights Reserved + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <errno.h> +#include <stdint.h> + +#include <osmocore/msgb.h> +#include <osmocore/linuxlist.h> +#include <osmocore/timer.h> +#include <osmocore/talloc.h> + +#include <openbsc/gsm_data.h> +#include <openbsc/debug.h> +#include <openbsc/gprs_bssgp.h> +#include <openbsc/gprs_llc.h> + +/* Chapter 7.2: SN-PDU Formats */ +struct sndcp_common_hdr { + /* octet 1 */ + uint8_t nsapi:4; + uint8_t more:1; + uint8_t type:1; + uint8_t first:1; + uint8_t spare:1; + /* octet 2 */ + uint8_t pcomp; + uint8_t dcomp; +}; + +struct sndcp_udata_hdr { + /* octet 3 */ + uint8_t npdu_high:4; + uint8_t seg_nr:4; + /* octet 4 */ + uint8_t npdu_low; +}; + +/* Entry point for the LL-UNITDATA.indication */ +int sndcp_unitdata_ind(struct msgb *msg, uint8_t sapi, uint8_t *hdr, uint8_t len) +{ + struct sndcp_udata_hdr *suh; + uint16_t npdu; + + if (suh->type == 0) { + LOGP(DGPRS, LOGL_ERROR, "SN-DATA PDU at unitdata_ind() function\n"); + return -EINVAL; + } + + npdu = (suh->npdu_high << 8) | suh->npdu_low; +} + |