Philipp | a536fc6 | 2016-08-10 12:14:57 +0200 | [diff] [blame] | 1 | /* GPRS LLC XID field encoding/decoding as per 3GPP TS 44.064 */ |
| 2 | |
| 3 | /* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * Author: Philipp Maier |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU Affero General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #pragma once |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | #include <osmocom/core/linuxlist.h> |
| 26 | |
| 27 | /* 3GPP TS 44.064 6.4.1.6 Exchange Identification (XID) |
| 28 | command/response parameter field */ |
| 29 | struct gprs_llc_xid_field { |
| 30 | struct llist_head list; |
| 31 | uint8_t type; /* See also Table 6: LLC layer parameter |
| 32 | negotiation */ |
| 33 | uint8_t *data; /* Payload data (memory is owned by the |
| 34 | * creator of the struct) */ |
| 35 | unsigned int data_len; /* Payload length */ |
| 36 | }; |
| 37 | |
| 38 | /* Transform a list with XID fields into a XID message (dst) */ |
| 39 | int gprs_llc_compile_xid(uint8_t *dst, int dst_maxlen, |
| 40 | const struct llist_head *xid_fields); |
| 41 | |
| 42 | /* Transform a XID message (dst) into a list of XID fields */ |
| 43 | struct llist_head *gprs_llc_parse_xid(const void *ctx, const uint8_t *src, |
| 44 | int src_len); |
| 45 | |
| 46 | /* Create a duplicate of an XID-Field */ |
| 47 | struct gprs_llc_xid_field *gprs_llc_dup_xid_field(const void *ctx, |
| 48 | const struct gprs_llc_xid_field *xid_field); |
| 49 | |
| 50 | /* Copy an llist with xid fields */ |
| 51 | struct llist_head *gprs_llc_copy_xid(const void *ctx, |
| 52 | const struct llist_head *xid_fields); |
| 53 | |
| 54 | /* Dump a list with XID fields (Debug) */ |
| 55 | void gprs_llc_dump_xid_fields(const struct llist_head *xid_fields, |
| 56 | unsigned int logl); |
| 57 | |