/* GPRS SNDCP header compression handler */ /* (C) 2016 by sysmocom s.f.m.c. GmbH * All Rights Reserved * * Author: Philipp Maier * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation; either version 3 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . */ #pragma once #include #include #include /* Note: The decompressed packet may have a maximum size of: * Return value + MAX_DECOMPR_INCR */ #define MAX_HDRDECOMPR_INCR 64 /* Initalize header compression */ int gprs_sndcp_pcomp_init(const void *ctx, struct gprs_sndcp_comp *comp_entity, const struct gprs_sndcp_comp_field *comp_field); /* Terminate header compression */ void gprs_sndcp_pcomp_term(struct gprs_sndcp_comp *comp_entity); /* Expand packet header */ int gprs_sndcp_pcomp_expand(uint8_t *data, unsigned int len, uint8_t pcomp, const struct llist_head *comp_entities); /* Compress packet header */ int gprs_sndcp_pcomp_compress(uint8_t *data, unsigned int len, uint8_t *pcomp, const struct llist_head *comp_entities, uint8_t nsapi);