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ROHC compression/decompression library
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00001 /* 00002 * This program is free software; you can redistribute it and/or modify 00003 * it under the terms of the GNU General Public License as published by 00004 * the Free Software Foundation; either version 2 of the License, or 00005 * (at your option) any later version. 00006 * 00007 * This program is distributed in the hope that it will be useful, 00008 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00009 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00010 * GNU General Public License for more details. 00011 * 00012 * You should have received a copy of the GNU General Public License 00013 * along with this program; if not, write to the Free Software 00014 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00015 */ 00016 00024 #ifndef CRC_H 00025 #define CRC_H 00026 00027 #include "ip.h" 00028 00030 #define CRC_TYPE_2 1 00031 00032 #define CRC_TYPE_3 2 00033 00034 #define CRC_TYPE_6 3 00035 00036 #define CRC_TYPE_7 4 00037 00038 #define CRC_TYPE_8 5 00039 00041 #define CRC_INIT_2 0x3 00042 00043 #define CRC_INIT_3 0x7 00044 00045 #define CRC_INIT_6 0x3f 00046 00047 #define CRC_INIT_7 0x7f 00048 00049 #define CRC_INIT_8 0xff 00050 00051 00053 extern unsigned char crc_table_8[256]; 00055 extern unsigned char crc_table_7[256]; 00057 extern unsigned char crc_table_6[256]; 00059 extern unsigned char crc_table_3[256]; 00061 extern unsigned char crc_table_2[256]; 00062 00063 00064 /* 00065 * Function prototypes. 00066 */ 00067 00068 unsigned int crc_calculate(int type, 00069 unsigned char *data, 00070 int length, 00071 unsigned int init_val); 00072 00073 int crc_get_polynom(int type); 00074 00075 void crc_init_table(unsigned char *table, unsigned char polynum); 00076 00077 unsigned int compute_crc_static(const unsigned char *ip, 00078 const unsigned char *ip2, 00079 const unsigned char *next_header, 00080 unsigned int crc_type, 00081 unsigned int init_val); 00082 unsigned int compute_crc_dynamic(const unsigned char *ip, 00083 const unsigned char *ip2, 00084 const unsigned char *next_header, 00085 unsigned int crc_type, 00086 unsigned int init_val); 00087 00088 unsigned int udp_compute_crc_static(const unsigned char *ip, 00089 const unsigned char *ip2, 00090 const unsigned char *next_header, 00091 unsigned int crc_type, 00092 unsigned int init_val); 00093 unsigned int udp_compute_crc_dynamic(const unsigned char *ip, 00094 const unsigned char *ip2, 00095 const unsigned char *next_header, 00096 unsigned int crc_type, 00097 unsigned int init_val); 00098 00099 00100 unsigned int rtp_compute_crc_static(const unsigned char *ip, 00101 const unsigned char *ip2, 00102 const unsigned char *next_header, 00103 unsigned int crc_type, 00104 unsigned int init_val); 00105 unsigned int rtp_compute_crc_dynamic(const unsigned char *ip, 00106 const unsigned char *ip2, 00107 const unsigned char *next_header, 00108 unsigned int crc_type, 00109 unsigned int init_val); 00110 00111 unsigned int ipv6_ext_compute_crc_static(const unsigned char *ip, 00112 unsigned int crc_type, 00113 unsigned int init_val); 00114 unsigned int ipv6_ext_compute_crc_dynamic(const unsigned char *ip, 00115 unsigned int crc_type, 00116 unsigned int init_val); 00117 00118 #endif 00119
1.7.6.1