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/* iprohc_coding_util.h - ROHC coding/decoding routines */
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/*
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* Copyright (c) 2008 Wind River Systems, Inc.
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*
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* The right to copy, distribute or otherwise make use of this software
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* may be licensed only pursuant to the terms of an applicable Wind River
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* license agreement. No license to Wind River intellectual property rights
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* is granted herein. All rights not licensed by Wind River are reserved
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* by Wind River.
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*/
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/*
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modification history
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--------------------
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01h,01oct11,ggz Added capability to simulate various ipid change pattern
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01g,01dec09,ggz Add LSB encoding
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01f,01dec09,ggz Include LSB routines regardless to the option IPROHC_WLSB_LSB
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01e,01dec09,ggz Added k parameter to some WLSB/LSB APIs
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01d,01dec09,ggz Added p = 0 support
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01c,01dec09,ggz Added 32 bit WLSB value support and a test case
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01b,02mar09,tlu Fix Linux build warning
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01a,05apr08,ggz Created
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*/
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#ifndef IPROHC_CODING_UTIL_H
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#define IPROHC_CODING_UTIL_H
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/*
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****************************************************************************
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* INCLUDE FILES
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****************************************************************************
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*/
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#define IPCOM_USE_CLIB_PROTO
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#include <ipcom_type.h>
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#include <ipcom_os.h>
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#include <ipcom_list.h>
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#include <ipcom_err.h>
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#include <ipcom_syslog.h>
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#include <ipcom_time.h>
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#include <ipcom_clib.h>
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#include "iprohc.h"
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/*
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****************************************************************************
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* DEFINES
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****************************************************************************
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*/
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#undef ROHC_DEBUG_TEST_WLSB
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#undef ROHC_DEBUG_ENABLE_LOG
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/*
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* For field values that are expected always to increase, p can be
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* set to -1. The interpretation interval becomes
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* v_ref + 1, v_ref + 2^k].
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*/
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#ifdef ROHC_DEBUG_TEST_WLSB
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#define P_FOR_INCR -1
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/* For field values that stay the same or increase, p can be set to
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0. The interpretation interval becomes [v_ref, v_ref + 2^k - 1].*/
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#define P_FOR_STAT_INCR 0
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#endif
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/*
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****************************************************************************
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* Public TYPES
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****************************************************************************
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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****************************************************************************
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* LOCAL TYPES
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****************************************************************************
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*/
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/*#ifdef IPROHC_WLSB_LSB*/
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typedef struct cmp_wlsb_wnd{
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Ip_u32 val;
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Ip_u32 index;
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} cmp_wlsb_wnd;
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/*
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This is a prototype for passsing WLSB stucts of variouse types to generic functions.
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We could use dynamic allocation but this is much faster.
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Warning: cmp_wnd rngBuf[1] - must always be the last in the structure.
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In case of modification of this structure the structure in
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iprohc_create_cmp_wlsb_struct macro should be updated as well.
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*/
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typedef struct cmp_wslb_cast{
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int rngBuf_marker;
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int rngBuf_curr;
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int num_of_vals;
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int sizeOfWnd;
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int numOfBits;
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int p;
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cmp_wlsb_wnd rngBuf[1]; /* This arrays must always be the last in the structure */
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} cmp_wslb_cast;
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/*#endif*/ /*IPROHC_WLSB_LSB*/
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typedef struct cmp_lsb{
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Ip_u32 ref;
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Ip_u32 prev_ref;
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int p;
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int numOfBits;
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int num_of_vals;
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}cmp_lsb;
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typedef struct cmp_lsb_intrvl{
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Ip_u32 left_margin;
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Ip_u32 right_margin;
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} cmp_lsb_intrvl;
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typedef struct dmp_lsb{
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Ip_u32 ref;
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Ip_u32 prev_ref;
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int p;
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Ip_u32 bit_mask;
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/*int numOfBits;*/
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int num_of_vals;
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}dmp_lsb;
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typedef struct dmp_lsb_intrvl{
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Ip_u32 left_margin;
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Ip_u32 right_margin;
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}dmp_lsb_intrvl;
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/*
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****************************************************************************
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* Application APIs
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****************************************************************************
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*/
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/*
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****************************************************************************
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* GLOBAL FUNCTIONS
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****************************************************************************
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*/
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/*#ifdef IPROHC_WLSB_LSB*/
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/*
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Add here WLSB structes with variouse lengt if needed. The name should be unique
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Warning cmp_wnd rngBuf[sizeOfWnd] - must always be the last on the structure
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*/
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#define iprohc_create_cmp_wlsb_struct(name, szOfWnd) \
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struct { \
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int rngBuf_marker; \
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int rngBuf_curr; \
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int num_of_vals; \
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int sizeOfWnd; \
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int numOfBits; \
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int p; \
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cmp_wlsb_wnd rngBuf[szOfWnd]; \
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} name
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#define iprohc_create_cmp_lsb_struct(name) \
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cmp_lsb name
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IP_PUBLIC void iprohc_init_cmp_wlsb_struct(cmp_wslb_cast* wlsb, int sizeOfWnd,
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int numOfBits, int p);
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IP_PUBLIC Ip_bool iprohc_cmp_wlsb_add_val(cmp_wslb_cast* wlsb, Ip_u32 val, Ip_u32 index);
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IP_PUBLIC Ip_bool iprohc_cmp_wlsb_encode_val(cmp_wslb_cast *wlsb, Ip_u32 val, Ip_u32
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*enc_val, Ip_u8* enc_val_ln);
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/*#endif*/ /*IPROHC_WLSB_LSB*/
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#define iprohc_create_cmp_lsb_struct(name) \
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cmp_lsb name
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#define iprohc_create_dmp_lsb_struct(name) \
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dmp_lsb name
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IP_PUBLIC void iprohc_init_cmp_lsb_struct(cmp_lsb* lsb, int numOfBits, int p);
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IP_PUBLIC void iprohc_cmp_lsb_add_val(cmp_lsb* lsb, Ip_u32 val);
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IP_PUBLIC Ip_bool iprohc_cmp_lsb_encode_val(cmp_lsb *lsb, Ip_u32 val, Ip_u32 *enc_val, Ip_u8* enc_val_ln);
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/* Don't initialize the WLSB ring buffer */
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IP_PUBLIC void iprohc_init_dmp_lsb_struct(dmp_lsb *lsb, int p, Ip_u32 bit_mask);
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IP_PUBLIC void iprohc_dmp_lsb_save_last_valid_ref(dmp_lsb* lsb, Ip_u32 rev);
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IP_PUBLIC Ip_bool iprohc_lsb_decode_and_save_ip_sn_ref(Ip_u32* dec_val, dmp_lsb *lsb, Ip_u32 val, Ip_u8 k);
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IP_PUBLIC Ip_bool iprohc_lsb_decode_and_save_ref(Ip_u32* dec_val, dmp_lsb *lsb, Ip_u32 val, Ip_u8 k);
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IP_PUBLIC Ip_bool iprohc_lsb_encode_32(Ip_u32 ref_val, Ip_u32 val, Ip_u8 k, int p);
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IP_PUBLIC Ip_bool iprohc_lsb_decode_32(Ip_u32* dec_val, Ip_u32 ref_val,
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Ip_u32 val, Ip_u8 k, int p);
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#ifdef IPROHC_USE_TEST
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#ifdef IPROHC_TCP_IP_SIMULATED_IPID
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IP_PUBLIC void iprohc_ipid_sim(Ipcom_pkt *pkt, Ip_u16 ipid_gen);
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#endif
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#endif
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/*
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****************************************************************************
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* LOCAL FUNCTIONS
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****************************************************************************
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*/
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/*#ifdef IPROHC_WLSB_LSB*/
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#ifdef ROHC_DEBUG_TEST_WLSB
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IP_PUBLIC void test_wlsb_ip_id(void);
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IP_PUBLIC void test_wlsb_32bit(void);
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IP_PUBLIC void test_lsb_16bit(void);
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IP_PUBLIC void test_lsb_32bit(void);
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IP_PUBLIC void test_lsb_32(void);
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#endif
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/*#endif*/ /* IPROHC_WLSB_LSB */
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#ifdef __cplusplus
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}
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#endif
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#endif
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/*
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****************************************************************************
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* END OF FILE
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****************************************************************************
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*/
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