关于uIP及其Data Struct

uIP 文档：

文件:	uip-1.0-refman.pdf
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1、The Ethernet header.

__packed struct uip_eth_hdr

{

struct uip_eth_addr dest;

struct uip_eth_addr src;

u16_t type;

};

__packed struct uip_eth_addr

{

u8_t addr[6];

};

#define UIP_ETHTYPE_ARP 0x0806

#define UIP_ETHTYPE_IP  0x0800

#define UIP_ETHTYPE_IP6 0x86dd

2、ip_header 

__packed struct ethip_hdr

{

     struct uip_eth_hdr ethhdr;

     /* IP header. */

     u8_t vhl,                   //10

         tos,

         len[2],

         ipid[2],

         ipoffset[2],

         ttl,

         proto;

     u16_t ipchksum;             //2

     u16_t srcipaddr[2],         //8

          destipaddr[2];

};

 

 

/* TCP header. */

u16_t srcport,

destport;

u8_t seqno[4],

ackno[4],

tcpoffset,

flags,

wnd[2];

u16_t tcpchksum;

u8_t urgp[2];

u8_t optdata[4];

3、a uIP TCP connection.

struct uip_tcp_conn

{  //fhy

u16_t ripaddr[2]; /**< The IP address of the remote host. */

u16_t lport; /**< The local TCP port, in network byte order. */

u16_t rport; /**< The local remote TCP port, in network byte order. */         //8

u8_t rcv_nxt[4]; /**< The sequence number that we expect to receive next. */

u8_t snd_nxt[4]; /**< The sequence number that was last sent by us. */         //8

u16_t len; /**< Length of the data that was previously sent. */                //2

u16_t mss; /**< Current maximum segment size for the connection. */

u16_t initialmss; /**< Initial maximum segment size for the connection. */

u8_t sa; /**< Retransmission time-out calculation state variable. */

u8_t sv; /**< Retransmission time-out calculation state variable. */

u16_t rto; /**< Retransmission time-out. */

u8_t tcpstateflags; /**< TCP state and flags. */

u16_t timer; /**< The retransmission timer. */        

u8_t nrtx; /**< The number of retransmissions for the last segment sent. */

/** The application state. */

u8_t appstate[UIP_APPSTATE_SIZE];

};

4、appstate

__packed struct netreader_state

{

     DWORD dwCmdParaLen;    //要接收数据的总长度

     DWORD dwRecvPos;       //已经接收到的长度

     DWORD dwSndLen;

     enum statemachine  state;

};

 

uip_appdata = ( volatile u8_t*) (uip_buf + 40 + UIP_LLH_LEN);    //???

 

__packed struct arp_hdr {

     struct uip_eth_hdr ethhdr;

     u16_t hwtype;

     u16_t protocol;

     u8_t hwlen;

     u8_t protolen;

     u16_t opcode;

     struct uip_eth_addr shwaddr;

     u16_t sipaddr[2];

     struct uip_eth_addr dhwaddr;

     u16_t dipaddr[2];

};