ether.h

完整的Bell实验室的嵌入式文件系统TFS

/* TFTP is UDP port 69... (see Stevens pg 206)
 */
#define IPPORT_TFTP         69
#define IPPORT_TFTPSRC      8888

#define TFTP_NETASCII_WRQ   1
#define TFTP_NETASCII_RRQ   2
#define TFTP_OCTET_WRQ      3
#define TFTP_OCTET_RRQ      4
#define TFTP_DATAMAX        512
#define TFTP_PKTOVERHEAD    (ETHERSIZE + IPSIZE + UDPSIZE)
#define TFTPACKSIZE         (TFTP_PKTOVERHEAD + 4)

/************************************************************************
 *
 * DHCP stuff...
 * See RFCs 2131 & 2132 for more details.
 * Note that the values used for dhcpstate enum are based on the state
 * diagram in 3rd Edition Comer pg 375.  Plus a few more so that I can
 * used the same enum for DHCP and BOOTP.
 *
 */

#define BOOTPSIZE (sizeof(struct ether_header) + sizeof(struct ip) + \
    sizeof(struct Udphdr) + sizeof(struct bootphdr))

#define DHCPSIZE (sizeof(struct ether_header) + sizeof(struct ip) + \
    sizeof(struct Udphdr) + sizeof(struct dhcphdr))

#define IPPORT_DHCP_SERVER  67
#define IPPORT_DHCP_CLIENT  68

#define DHCPBOOTP_REQUEST   1
#define DHCPBOOTP_REPLY     2

#define USE_NULL            0
#define USE_DHCP            1
#define USE_BOOTP           2

#define DHCP_VERBOSE    (SHOW_DHCP|SHOW_INCOMING|SHOW_OUTGOING|SHOW_BROADCAST)

/* DHCP Message types:
 */
#define DHCPDISCOVER    1
#define DHCPOFFER       2
#define DHCPREQUEST     3
#define DHCPDECLINE     4
#define DHCPACK         5
#define DHCPNACK        6
#define DHCPRELEASE     7
#define DHCPUNKNOWN     99

/* DHCPState (short) values: (upper bit set = bootp)
 */
#define DHCPSTATE_INITIALIZE        0x0001
#define DHCPSTATE_SELECT            0x0002
#define DHCPSTATE_REQUEST           0x0003
#define DHCPSTATE_BOUND             0x0004
#define DHCPSTATE_RENEW             0x0005
#define DHCPSTATE_REBIND            0x0006
#define DHCPSTATE_NOTUSED           0x0007
#define DHCPSTATE_RESTART           0x0008
#define BOOTP_MODE                  0x8000
#define BOOTPSTATE_INITIALIZE       0x8001
#define BOOTPSTATE_REQUEST          0x8002
#define BOOTPSTATE_RESTART          0x8003
#define BOOTPSTATE_COMPLETE         0x8005

/* DHCP Options
 */
#define DHCPOPT_SUBNETMASK          1
#define DHCPOPT_ROUTER              3
#define DHCPOPT_HOSTNAME            12
#define DHCPOPT_BROADCASTADDRESS    28
#define DHCPOPT_VENDORSPECIFICINFO  43
#define DHCPOPT_REQUESTEDIP         50
#define DHCPOPT_LEASETIME           51
#define DHCPOPT_MESSAGETYPE         53
#define DHCPOPT_SERVERID            54
#define DHCPOPT_PARMRQSTLIST        55
#define DHCPOPT_CLASSID             60
#define DHCPOPT_CLIENTID            61
#define DHCPOPT_NISDOMAINNAME       64
#define DHCPOPT_NISSERVER           65

#define STANDARD_MAGIC_COOKIE       0x63825363      /* 99.130.83.99 */

struct dhcphdr {
    unsigned char   op;
    unsigned char   htype;
    unsigned char   hlen;
    unsigned char   hops;
    unsigned long   transaction_id;
    unsigned short  seconds;
    unsigned short  flags;
    unsigned long   client_ip;
    unsigned long   your_ip;
    unsigned long   server_ip;
    unsigned long   router_ip;
    unsigned char   client_macaddr[16];
    unsigned char   server_hostname[64];
    unsigned char   bootfile[128];
    unsigned long   magic_cookie;
    /* Dhcp options would start here */
};

struct bootphdr {
    unsigned char   op;
    unsigned char   htype;
    unsigned char   hlen;
    unsigned char   hops;
    unsigned long   transaction_id;
    unsigned short  seconds;
    unsigned short  unused;
    unsigned long   client_ip;
    unsigned long   your_ip;
    unsigned long   server_ip;
    unsigned long   router_ip;
    unsigned char   client_macaddr[16];
    unsigned char   server_hostname[64];
    unsigned char   bootfile[128];
    unsigned char   vsa[64];
};

unsigned char *DhcpGetOption();

/************************************************************************
 * 
 * DNS stuff...
 *
 * The area of the dnshdr structure beginning with the question array
 * is actually a variable sized area for four sections:
 *  question, answer, authority and additional information.
 * For the monitor's implementation of DNS, it is simplified to need
 * only the question section because we are only using this to do
 * a standard DNS query (give a domain name to a server and wait for
 * a response that has the IP address).
 * So, for the sake of building a fixed size structure, we allocate a
 * 64 byte question section and assume that no single domain name request
 * will exceed that length.
 * Note: first byte of domain name is the size.
 */
#define MAX_DOMAIN_NAME_SIZE    63

struct dnshdr {
    unsigned short  id;
    unsigned short  param;
    unsigned short  num_questions;
    unsigned short  num_answers;
    unsigned short  num_authority;  
    unsigned short  num_additional;
    unsigned char   question[MAX_DOMAIN_NAME_SIZE+1];
};


/************************************************************************
 *
 * TCP stuff...
 *
 */

struct  tcphdr {
    unsigned short  sport;              /* Source port */
    unsigned short  dport;              /* Source port */
    unsigned long   seqno;              /* Sequence number */
    unsigned long   ackno;              /* Acknowledgment number */
    unsigned short  flags;              /* Flags (lower 6 bits) */
    unsigned short  windowsize;         /* Window size */
    unsigned short  tcpcsum;            /* TCP checksum */
    unsigned short  urgentptr;          /* Urgent pointer */
/*  options (if any) & data (if any) follow */
};

/* Masks for flags (made up of flag bits, reserved bits & header length):
 */
#define TCP_FLAGMASK    0x003F
#define TCP_RSVDMASK    0x0FC0
#define TCP_HDRLENMASK  0xF000
#define TCP_HLEN(tp)    (((tp)->flags & TCP_HDRLENMASK) >> 10)

/* Masks for flag bits within flags member:
 */
#define TCP_FINISH          0x0001
#define TCP_SYNC            0x0002
#define TCP_RESET           0x0004
#define TCP_PUSH            0x0008
#define TCP_ACK             0x0010
#define TCP_URGENT          0x0020


/************************************************************************
 *
 * Miscellaneous...
 *
 */

/* Port that is used to issue monitor commands through ethernet.
 */
#define MONRESPSIZE (sizeof(struct ether_header) + sizeof(struct ip) + \
    sizeof(struct Udphdr) + idx)
#define IPPORT_MONCMD       777

/* Verbosity levels used by various ethernet layers:
 */
#define SHOW_INCOMING   0x00000001
#define SHOW_OUTGOING   0x00000002
#define SHOW_HEX        0x00000004
#define SHOW_BROADCAST  0x00000008
#define SHOW_TFTP       0x00000010
#define SHOW_DHCP       0x00000020
#define SHOW_ARP        0x00000040
#define SHOW_ASCII      0x00000080
#define SHOW_BADCSUM    0x00000100
#define SHOW_BADCSUMV   0x00000200
#define SHOW_PHY        0x00000400
#define SHOW_ALL        0xffffffff

#define ETHER_INCOMING 1
#define ETHER_OUTGOING 2

extern  char *Etheradd, *IPadd;
extern  unsigned char etheraddr[], ipaddr[];
extern  unsigned short MoncmdPort, TftpPort, TftpSrcPort;
extern  unsigned short DhcpClientPort, DhcpServerPort, DHCPState;
extern  int EtherVerbose, IPMonCmdActive, EtherIsActive;
extern  unsigned char BinEnetAddr[], BroadcastAddr[], BinIpAddr[];
extern  int EtherXFRAMECnt, EtherRFRAMECnt, EtherIPERRCnt, EtherUDPERRCnt;

extern  int pollethernet(void);
extern  int getAddresses(void);
extern  int IpToBin(char *,unsigned char *);
extern  int EtherToBin(char *,unsigned char *);
extern  char *extGetIpAdd(), *extGetEtherAdd();
extern  char *IpToString(unsigned long, char *);
extern  char *EtherToString(unsigned char *,char *);
extern  unsigned short ipId(void);
extern  unsigned char *ArpEther(unsigned char *,unsigned char *,int);
extern  unsigned char *getXmitBuffer();
extern  unsigned char *EtherFromCache(unsigned char *);
extern  void ipChksum(struct ip *), udpChksum(struct ip *);
extern  void tcpChksum(struct ip *);
extern  void printPkt(struct ether_header *,int,int);
extern  void printMem(unsigned char *,int);
extern  void DhcpBootpDone(int, struct dhcphdr *,int);
extern  void DhcpVendorSpecific(struct  dhcphdr *);
extern  int sendBuffer(int);
extern  struct  ether_header *EtherCopy(struct ether_header *);
extern  int EthernetStartup(int,int);
extern  int ValidDHCPOffer(struct   dhcphdr *);
extern  int buildDhcpHdr(struct dhcphdr *);
extern  int printDhcpVSopt(int,int,char *);
extern  int RetransmitDelay(int);
extern  int tftpGet(unsigned long,char *,char *,char *,char *,char *,char *);
extern  void printDhcp(struct Udphdr *);
extern  int printIp(struct ip*);
extern  int printUdp(struct Udphdr *);
extern  void processPACKET(struct ether_header *,unsigned short);
extern  void processTCP(struct ether_header *,unsigned short);
extern  int processTFTP(struct ether_header *,unsigned short);
extern  int processICMP(struct ether_header *,unsigned short);
extern  char *processARP(struct ether_header *,unsigned short);
extern  int processDHCP(struct ether_header *,unsigned short);
extern  int processRARP(struct ether_header *,unsigned short);
extern  int SendICMPUnreachable(struct ether_header *,unsigned char);
extern  void enresetmmu(void), enreset(void);
extern  void ShowEtherdevStats(void), ShowTftpStats(void), ShowDhcpStats(void);
extern  void enablePromiscuousReception(void);
extern  void disablePromiscuousReception(void);
extern  int enselftest(int), polletherdev(void), EtherdevStartup(int);
extern  void DisableEtherdev(void);
extern  void tftpStateCheck(void), dhcpStateCheck(void);
extern  int DhcpIPCheck(char *);
extern  void dhcpDisable(void);
extern  void tftpInit(void);
extern  void disableBroadcastReception();
extern  void enableBroadcastReception();
extern  int SendIPMonChar(unsigned char,int);
extern  void DisableEthernet(void);