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/*
* Bump in the Host (BIH)
* http://code.google.com/p/bump-in-the-host/source/
* ----------------------------------------------------------
*
* Copyrighted (C) 2010,2011 by the China Mobile Communications
* Corporation <bih.cmcc@gmail.com>;
* See the COPYRIGHT file for full details.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#ifndef _FANYI_H
#define _FANYI_H
#define FANYI_ETH 0
#define BUFF_SIZE 4096
#define FRAG_BUFF_SIZE 1232
//#define FRAG_BUFF_SIZE 1400
#define TRANSLATED_PREFIX 0x0000ffff
#define MAPPED_PREFIX 0x0000ffff
#define IP4_IP6_HDR_DIFF 20
#define IP6_FRAGMENT_SIZE 8
#define IP6F_OFF_MASK 0xfff8
#define IP6F_RESERVED_MASK 0x0006
#define IP6F_MORE_FRAG 0x0001
struct ip6_opthdr
{
unsigned char nxt;
unsigned char len;
};
struct ip6_hdr
{
union
{
struct ip6_hdrctl
{
uint32_t ip6_un1_flow; /* 4 bits version, 8 bits TC,
20 bits flow-ID */
uint16_t ip6_un1_plen; /* payload length */
uint8_t ip6_un1_nxt; /* next header */
uint8_t ip6_un1_hlim; /* hop limit */
} ip6_un1;
uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits tclass */
} ip6_ctlun;
struct in6_addr ip6_src; /* source address */
struct in6_addr ip6_dst; /* destination address */
};
#define ip6_vfc ip6_ctlun.ip6_un2_vfc
#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
struct ipv6 {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned char priority:4,version:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned char version:4,priority:4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
unsigned char flow_lbl[3];
unsigned short payload_len;
unsigned char nexthdr;
unsigned char hop_limit;
struct in6_addr saddr;
struct in6_addr daddr;
};
struct ip
{
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned int ip_hl:4; /*header length*/
unsigned int ip_v:4; /*version*/
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned int ip_v:4; /*version*/
unsigned int ip_hl:4; /*header length*/
#endif
unsigned char ip_tos; /*type of service*/
unsigned short ip_len; /*total length*/
unsigned short ip_id; /*identification*/
unsigned short ip_off; /*fragment offset field*/
#define IP_RF 0x8000 /*reserved fragment flag*/
#define IP_DF 0x4000 /*dont fragment flag*/
#define IP_MF 0x2000 /*more fragments flag*/
#define IP_OFFMASK 0x1fff /*mask for fragmenting bits*/
unsigned char ip_ttl; /*time to live*/
unsigned char ip_p; /*protocol*/
unsigned short ip_sum; /*checksum*/
unsigned int ip_src,ip_dst;/*source and dest address*/
}__attribute__((packed));
struct tcp
{
unsigned short sport; /*源端口*/
unsigned short dport; /*目的端口*/
unsigned int seq; /*标识TCP数据包的序列号*/
unsigned int ack_seq; /*确认序列号,表示接受方下一次接受的数据序列号*/
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned short res1:4;
unsigned short doff:4; /*TCP数据包首部长度,以4字节为单位,
一般的时候为5*/
unsigned short fin:1; /*如果设置为1的时候,表示请求关闭连接*/
unsigned short syn:1; /*如果设置为1的时候,表示请求建立连接*/
unsigned short rst:1; /*如果设置为1的时候,表示请求重新连接*/
unsigned short psh:1; /*如果设置为1,那么接收方收到数据后,
立即交给上一层程序*/
unsigned short ack:1; /*如果确认号正确则为1*/
unsigned short urg:1; /*如果设置紧急数据指针,则该位为1*/
unsigned short res2:2;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned short doff:4;
unsigned short res1:4;
unsigned short res2:2;
unsigned short urg:1;
unsigned short ack:1;
unsigned short psh:1;
unsigned short rst:1;
unsigned short syn:1;
unsigned short fin:1;
#endif
unsigned short window; /*告诉接收者可以接收的大小*/
unsigned short check; /*TCP数据报校验*/
unsigned short urg_prt; /*如果urg=1,那么指出紧急数据
对于历史数据开始的序列号的偏移值*/
}__attribute__((packed));
struct udp
{
unsigned short sport;
unsigned short dport;
unsigned short len;
unsigned short check;
}__attribute__((packed));
#define lprintf(level,format,...) \
do \
{ \
if(level==0) \
printk("%s(%d)%s: "format,__FILE__,__LINE__,(char *)__FUNCTION__,##__VA_ARGS__ ); \
else \
printk((format),##__VA_ARGS__ ); \
} \
while(0)
#define PKG_PUT_SHORT(val, cp) \
do \
{ \
unsigned short Xv; \
Xv = (unsigned short)(val); \
*(cp)++ = (unsigned char)(Xv >> 8); \
*(cp)++ = (unsigned char)Xv; \
} \
while(0)
#endif
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