BBN-V6/tcp/tcpstru.h
#
/* Port name declarations */
# define CMDUSRNM "/dev/net/cmdusrxxx" /* user cmd port name prototype */
# define CMDTCPNM "/dev/net/cmdtcpxxx" /* tcp cmd port name prototype */
# define SENDNM "/dev/net/datsndxxxxxx" /* send data port name prototype */
# define RECVNM "/dev/net/datrcvxxxxxx" /* recv data port name prototype */
# define EAR "/dev/net/earx" /* ear port name */
# define PRTPREFIX 15 /* number of chars in port name prefix */
/* the following are the names for the absolute version
/dev/net/cmdusrxxx
/dev/net/cmdtcpxxx
/dev/net/datsndxxxxxx
/dev/net/datrcvxxxxxx
/dev/net/earx
PRTPREFIX = 15
*/
/* TCP Library error return codes */
# define EEARPRT 1 /* open of TCP ear port failed */
# define ERSPPRT 2 /* can't create tcp command port */
# define ECMDPRT 3 /* can't open user command port */
# define ETCPNRDY 4 /* TCP not responding */
# define ETCPNOPN 5 /* TCP cannot open tcp port */
# define ESNDPRT 6 /* error on send data port */
# define ERCVPRT 7 /* error on recv data port */
# define EUSRC 8 /* too many connections for this proc */
# define ENOSPC 9 /* not enough space in send port */
# define ENODATA 10 /* no data in recv port */
# define EBADRESP 11 /* error on TCP command port */
# define ENOCHNG 12 /* no change notices */
# define ESYSC 13 /* too many connections system wide */
# define ENOBUFS 14 /* tcp (or lib) is out of buffer space */
# define EILLS 15 /* illegal local port specification */
# define EUNAUTH 16 /* unauthorized parameter */
# define EUNSPEC 17 /* unspecified parameter in CAB */
# define ENOCONN 18 /* connection doesn't exist */
# define EBADPARAM 19 /* bad tcplib call parameter */
# define EMVSPT 20 /* Move: bad SPT in accepting TCB */
# define EMVSTATE 21 /* Move: connection not established */
# define ECMDCLS 22 /* tcp closed cmd port */
/* Command Port Message Opcodes */
# define OINIT 1 /* init opcode */
# define OABORT 2 /* abort opcode */
# define OURGENT 3 /* urgent opcode */
# define ORQSTAT 4 /* request status opcode */
# define OOPEN 5 /* open opcode */
# define OCLOSE 6 /* close opcode */
# define OSTOP 7 /* stop opcode */
# define ORESUME 8 /* resume opcode */
# define OMOVE 9 /* move opcode */
# define OACK 10 /* ack opcode */
# define OERR 11 /* error opcode */
# define OCHNG 12 /* change notice opcode */
# define OPROCNR 13 /* foreign process not responding */
# define OPROCR 14 /* foreign process responding again */
# define ORESET 15 /* connection reset */
# define OSTAT 16 /* TCP internal status opcode */
# define OREJECT 17 /* foreign TCP rejecting */
# define OSECERR 18 /* data security out of range */
# define OPRECCHNG 19 /* send precedence changed upward */
# define ONETMSG 20 /* net message arrived */
# define OUPDATE 21 /* update utcb parameters (move) */
# define OFLAKY 22 /* update flakeway parameters */
/* Connection States */
# define CLOSED 1
# define OPEN 2
# define SYNRECD 3
# define SYNSENT 4
# define ESTAB 5
# define FINWAIT 6
# define CLOSEWAIT 7
# define CLOSING 8
/* Internet option opcodes */
# define OPTSPT 2
/* Misc constants */
# define RBUFFSIZE 257 /* TCB data buffer size */
# define CMDTCPSIZE 64 /* max bytes in a tcp cmd msg */
# define CMDUSRSIZE 64 /* max bytes in a usr cmd msg */
# define HDRLNGTH 8 /* # bytes in port message hdr */
# define BSLLNGTH 16 /* BSL length in bytes */
# define INLNGTH 24 /* INL length in bytes */
# define TCPLNGTH 20 /* TCP header length in bytes */
# define NUMBTCC 4 /* number of TCCs allowed in Open */
# define AWTLENGTH 50 /* length of await buffer */
# define WORKSIZE 100 /* size of work list */
# define FDSSIZE 50 /* size of file descriptor blocks */
# define NUMBTCBS 10 /* number of allowed connections */
# define PORTCNT 16 /* size of port selector bit map */
# define TCPOTSZ 700 /* size of tcp output buffer */
# define TCPINSZ 700 /* size of tcp input buffer */
# define PORTSIZE 1024 /* size of Rand Port */
# define INVERNO 4 /* internet header version number */
# define TCPVERNO 6 /* TCP version number */
# define MINPREC 0 /* default minimum receive precedence */
# define MAXPREC 15 /* default maximum receive precedence */
# define NSTOP 4 /* Stop/Resume table size */
# define BASEPORT 01000 /* base of locally assigned port #s */
# define NUMNET 25 /* max number of foreign nets */
# define NUMTCPTBL 7 /* number of "tcptable" first line entries */
/* Opcodes for work list */
# define NETINHP 1
# define NETOUTHP 2
# define NETINLP 3
# define NETOUTLP 4
# define USERINHP 5
# define USEROUTHP 6
# define USERINLP 7
# define USEROUTLP 8
# define USRCMD 9
# define TCPCMD 10
# define EARIN 11
# define TTYIN 12
# define TTYOUT 13
/* TCP control bit definitions */
# define FIN 01
# define SYN 02
# define RST 04
# define EOL 010
# define ACK 020
# define URG 040
/* TCB Flags field definitions */
# define XURGSEND 01 /* urgent data to be sent */
# define XURGRECV 02 /* incoming urgent condition */
# define XSLOWRETN 04 /* entered slow transmition mode */
# define XSENDFIN 010 /* send FIN after all data */
# define XABTCONN 020 /* abort the connection */
# define XNOMOSEG 040 /* send no more segments */
# define XREJECT 0100 /* foreign TCP rejecting */
# define XDISCDATA 0200 /* discard user data */
# define XHNORESP 0400 /* foreign host not responding */
# define XRTNDATA 01000 /* don't send data unless retran */
# define XRETRANOK 02000 /* retransmit data */
/* various net and gateway information */
# define ARPANET 10 /* arpanet net number */
# define RCCNET 3 /* rcc net number */
# define PTIPGTWY 0205 /* rcc to arpanet gateway (133 decimal) */
/* Port Message Format Masks */
/* general message mask */
struct PMask1
{ int YOpCode;
int YHandle;
int YMisc;
int YMisc1;
};
/* Update UTCB parameters */
/* tcp -> lib: update parameters */
struct MUpdate
{ int ZOpCode; /* opcode */
int ZHandle; /* connection index */
int ZConnIndex; /* new tcp connection index */
long ZSndCnt; /* new send data count */
long ZRcvCnt; /* new recv data count */
};
/* Urgent */
/* lib -> tcp: send an urgent */
/* tcp -> lib: go into urgent mode */
struct MUrgent
{ int UOpCode; /* opcode */
int UHandle; /* connection index */
long UByteNo; /* byte number at which urgent is to end */
};
/* Open Connection */
/* lib -> tcp: open (listen for) a connection */
struct MOpen
{ int OpCode; /* opcode */
int OHandle; /* tcp connection index */
int OpenMode; /* 1 = Listen only, 2 = Accept only */
char Net; /* foreign network */
char HostH; /* foreign host - high byte */
int HostL; /* foreign host - low bytes */
int SrcPrt; /* local port */
int DstPrt; /* destination port */
char SendPrec; /* send precedence */
char RecvPrec; /* minimum recv precedence */
char MaxSecur; /* maximum security level of connection */
char AbsSecur; /* absolute security level of connection */
char NumbTcc; /* number of TCCs following */
char OTcc[NUMBTCC]; /* transmission control codes */
};
/* Close Connection */
/* lib -> tcp: I am finished sending data */
struct MClose
{ int COpCode; /* opcode */
int CHandle; /* tcp connection index */
long CFinNum; /* byte number where FIN should occur */
};
/* Status */
/* tcp -> lib: connection status information */
/* size of array is 48 bytes */
struct MStatus
{ int SOpCode; /* opcode */
int SState; /* state of connection (see below) */
char SNet; /* foreign net */
char SHost; /* foreign host */
int SImp; /* foreign imp */
int SLocPrt; /* local port */
int SForPrt; /* foreign port */
char SScMxOt; /* max security to net */
char SScMnOt; /* min security to net */
char SScMxIn; /* max security from net */
char SScMnIn; /* min security from net */
char SSndPrec; /* send precedence */
char SRcvPrec; /* recv precedence */
char SNTcc; /* size of TCC list */
char STcc[10]; /* list of TCCs */
int SSndWind; /* send window */
int SRcvWind; /* receive window */
int SAckData; /* # of bytes awaiting ack */
int SSndBuff; /* Data in send buffer */
int SRecBuff; /* Data in receive buffer */
int SSegRecv; /* # of segment received */
int SDupSeg; /* # segments received with duplicate data */
int SBusyRecv; /* # discarded segments */
int SRetran; /* # retransmitted segments */
};
/* Send Data */
/* lib -> tcp: send user data to tcp on send port */
struct MSend
{ char SnSecur; /* security level for this data */
char SnFlags; /* eol flag, urgent flag */
int SnByteCnt; /* amount of data in next msg */
};
struct TcpTcb
{ char ConnHandle; /* local connection index */
char State; /* state of connection */
/* see above for flag definitions */
int Flags; /* various work-to-do flags */
char TMode; /* mode of TcpOpen */
char ProcID; /* user ID */
int TCPCmdPort; /* file desc - TCP to user command port */
int UserCmdPort; /* file desc - user to TCP command port */
int SendPort; /* file desc - data from user port */
int RecvPort; /* file desc - data to user port */
/* Open Parameters */
char ScMaxOut; /* max security user to net */
char ScMinOut; /* min security user to net */
char ScMaxIn; /* max security net to user */
char ScMinIn; /* min security net to user */
char ATPrec; /* maximum user precedence allowed */
char SndPrec; /* send precedence */
char MnRcvPrec; /* minimum receive precedence */
char MxRcvPrec; /* maximum receive precedence */
char TCCCnt; /* count of following TCCs */
char TccList[NUMBTCC]; /* list of TCCs */
char OpnNet; /* foreign network */
char OpnHstH; /* foreign host - high byte */
int OpnHstL; /* foreign host - low word */
int OpnPort; /* foreign port */
/* Binary Segment Leader */
int PrecSec; /* precedence, security fields */
int TccCcc; /* transmission control code, command control code */
int SecTcc; /* redundant security, TCC fields */
int FnTcp; /* foreign TCP ID */
int VerSegNo; /* version, s-segment number */
int BSLSave[3]; /* unused BSL fields */
/* InterNet Header */
char TypeService; /* type of service */
char VerHdr; /* 4 bit version, 4 bit header length */
int SegLength; /* length of segment in octets */
int SegID; /* segment identification */
int FragOffset; /* 3 bits flags, 13 bits fragment offset */
char Protocol; /* next layer protocol identifier */
char TimeToLive; /* time to live... */
int INChkSum; /* internet header checksum */
char SrcHstH; /* source host - high byte */
char SrcNet; /* source network */
int SrcHstL; /* source host - lower two bytes */
char DstHstH; /* destination host - high byte */
char DstNet; /* destination network */
int DstHstL; /* destination host - lower two bytes */
char Options[4]; /* option field */
/* TCP Header */
int SrcePort; /* source port */
int DestPort; /* destination port */
long SeqNo; /* sequence number */
long AckNo; /* acknowledge number */
int TCPFlags; /* 4 bits data offset, rest are flags */
int Window; /* flow control window */
int TCPChkSum; /* checksum of TCP & parts of IN header */
int UrgentPtr; /* urgent pointer */
/* miscellaneous state information */
long LeftSeq; /* earliest unacknowledged octet seq no. */
long SendSeq; /* sequence # next to send */
long MaxSend; /* seq no. of last data sent + 1 */
int DataHd; /* octet last acknowledged */
int DataNxt; /* next octet to send */
int DataTl; /* last data item in send buffer */
int SndWindow; /* send window size in octets */
char RetranTm; /* retransmission time out */
char NumRetran; /* no. of retrans before good ACK */
int RetrSw; /* 1 => slow mode */
long SndUrgNo; /* urgent number for send */
long RcvUrgNo; /* urgent number for receive */
int DataState; /* state of data port from user */
int DataLeft; /* remaining data in input port */
int LastAckTime; /* time of last acknowledge - seconds */
long SndISN; /* initial send seq number */
long RcvISN; /* initial recv seq number */
long SndFSN; /* final send seq number */
int SndSpc1; /* data in send port */
int RcvSpc1; /* space in recv port */
/* measurement data */
int SegRecv; /* # of segments recvd */
int DupRecv; /* # of duplicate segments received */
int BusyRecv; /* # of discarded segments */
int RetranSeg; /* # of retransmitted segments */
/* Linkage area */
int *NxtActTcb; /* ptr to next active TCB */
int *NxtRetran; /* ptr to next retransmit TCB */
int *LstRetran; /* ptr to last retransmit TCB */
/* Retransmission Ring Buffer */
char RetranBuff[RBUFFSIZE]; /* input buffer/retransmission buffer */
char FlagBuff[RBUFFSIZE]; /* flags associated with data */
};
struct WorkBlk /* a block in the work list */
{ char PortFlags; /* misc work flags */
char PortFds; /* file descriptor of port */
struct TcpTcb *TCBPtr; /* ptr to TCB (also is fds for tcp) */
struct WorkBlk *LastWork; /* last node link address */
struct WorkBlk *NextWork; /* next node link address */
};
struct FdsBlk /* picture of an FdsBffer entry */
{ char BuffFlags; /* misc work flags */
char BuffFds; /* fds for port */
int *BuffTcbPtr; /* ptr to relevent TCB, temp for fds usr cmd */
};
struct /* used to break apart longs for printing */
{ int bb[2];
} *z;
struct PortLdr
{ int UsrPID;
int GroupID; /* file table pointer */
char RealUserID;
char EffUserID;
int DCount;
};