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168 lines
4.2 KiB
C
Executable file
168 lines
4.2 KiB
C
Executable file
/*************************************************************************
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*
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* ivi_config.h :
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*
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* MAP-T/MAP-E Configuration Header File
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*
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* Copyright (C) 2013 CERNET Network Center
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* All rights reserved.
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*
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* Design and coding:
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* Xing Li <xing@cernet.edu.cn>
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* Congxiao Bao <congxiao@cernet.edu.cn>
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* Yuncheng Zhu <haoyu@cernet.edu.cn>
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* Wentao Shang <wentaoshang@gmail.com>
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* Guoliang Han <bupthgl@gmail.com>
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*
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* Contributions:
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*
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* This file is part of MAP-T/MAP-E Kernel Module.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* You should have received a copy of the GNU General Public License
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* along with MAP-T/MAP-E Kernel Module. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* For more versions, please send an email to <bupthgl@gmail.com> to
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* obtain an password to access the svn server.
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*
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* LIC: GPLv2
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*
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************************************************************************/
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#ifndef IVI_CONFIG_H
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#define IVI_CONFIG_H
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#include <linux/types.h>
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#ifdef __KERNEL__
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#include <net/ipv6.h>
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#endif
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#define ADDR_FMT_NONE 0 // DMR format
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#define ADDR_FMT_MAPT 1 // BMR/FMR format
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#define ADDR_FMT_MAPX_CPE 2 // MAP CPE format with no eabits
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#define MAP_T 0 // Header translation
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#define MAP_E 1 // Header encapsulation mode 1: BR address is specified as a /128
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#define TCP_MAX_LOOP_NUM 20
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#define UDP_MAX_LOOP_NUM 6
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#ifndef IFNAMSIZ
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#define IFNAMSIZ 16
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#endif
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// comment this line out if you don't want to compile this code for the Linksys environment
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//#define LINKSYS_COMPILE
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//#define TP_LINK_COMPILE
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#ifdef LINKSYS_COMPILE
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static inline u32 get_unaligned_be32(const void *p) {
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u32 tmp;
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memcpy(&tmp, p, 4);
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return tmp;
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}
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#endif
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#ifndef NIP4
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#define NIP4_FMT "%u.%u.%u.%u"
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#ifdef TP_LINK_COMPILE
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#define NIP4(addr) \
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((unsigned char *)&addr)[0], \
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((unsigned char *)&addr)[1], \
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((unsigned char *)&addr)[2], \
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((unsigned char *)&addr)[3]
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#else
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#define NIP4(addr) \
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((unsigned char *)&addr)[3], \
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((unsigned char *)&addr)[2], \
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((unsigned char *)&addr)[1], \
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((unsigned char *)&addr)[0]
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#endif
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#endif
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#ifndef NIP6
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#define NIP6(addr) \
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ntohs((addr).s6_addr16[0]), \
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ntohs((addr).s6_addr16[1]), \
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ntohs((addr).s6_addr16[2]), \
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ntohs((addr).s6_addr16[3]), \
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ntohs((addr).s6_addr16[4]), \
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ntohs((addr).s6_addr16[5]), \
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ntohs((addr).s6_addr16[6]), \
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ntohs((addr).s6_addr16[7])
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#define NIP6_FMT "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
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#endif
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struct rule_info {
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__u32 prefix4;
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int plen4;
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struct in6_addr prefix6;
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int plen6;
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__u16 ratio;
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__u16 adjacent;
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__u8 format;
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__u8 transport;
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__u8 extension;
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};
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#define MAPT_PORTMAP_TCP 0
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#define MAPT_PORTMAP_UDP 1
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#define MAPT_PORTMAP_ICMP 2
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struct portmap_info {
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__u32 lanAddr;
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__u32 wanAddr;
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__u16 port;
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__u16 intPort;
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__u16 proto;
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};
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#ifdef __KERNEL__
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// comment this line out if you don't want to track any debug information
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//#define IVI_DEBUG
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// comment this line out if you don't want to track any debug information of tcp connection state
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//#define IVI_DEBUG_TCP
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// comment this line out if you don't want to track any debug information of rule mapping
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//#define IVI_DEBUG_RULE
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// comment this line out if you don't want to track any debug information of port mapping
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//#define IVI_DEBUG_MAP
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//#define IVI_DEBUG_MAP_TCP
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enum {
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IVI_MODE_HGW = 0, // Home gateway
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IVI_MODE_HGW_NAT44, // Home gateway with NAT44
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};
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#define IVI_HTABLE_SIZE 32
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#define IVI_GOLDEN_RATIO_16 0x9e37
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#define IVI_GOLDEN_RATIO_32 0x9e370001
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// Generic hash function for a 16 bit value, see 'Introduction to Algorithms, 2nd Edition' Section 11.3.2
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static inline int port_hashfn(__be16 port)
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{
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unsigned int m = port * IVI_GOLDEN_RATIO_16;
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return ((m & 0xf800) >> 11); // extract highest 6 bits as hash result
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}
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// Generic hash function for a 32 bit value, see 'Introduction to Algorithms, 2nd Edition' Section 11.3.2
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static inline int v4addr_port_hashfn(__be32 addr, __be16 port)
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{
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__be32 m = addr + port;
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m *= IVI_GOLDEN_RATIO_32;
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return ((m & 0xf8000000) >> 27);
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}
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#endif /* __KERNEL__ */
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#endif /* IVI_CONFIG_H */
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