SSF.OS.TCP
Class TCP_Message

java.lang.Object
  |
  +--SSF.OS.ProtocolMessage
        |
        +--SSF.OS.TCP.TCP_Header
              |
              +--SSF.OS.TCP.TCP_Message

public class TCP_Message

extends TCP_Header

TCP_Message represents a TCP header and data segment together with the prepended IpHeader.

Field Summary

int	seglen segment length of this TCP message

Fields inherited from class SSF.OS.TCP.TCP_Header

ACK, ACKno, AdvertisedWnd, DEST_port, FIN, flags, PSH, RST, SEQno, SOURCE_port, SYN, URG

Constructor Summary

TCP_Message(TCP_Header th, int destAddr, int len)
Construct a TCP message with TCP header th, including a prepended IpHeader with given destination IP address destAddr, source IP address set to -1, and virtual segment length len bytes.

TCP_Message(TCP_Header th, int srcAddr, int destAddr, int len)
Construct a TCP message with TCP header th, including a prepended IpHeader with source IP address srcAddr, destination IP address destAddr, and virtual segment length len bytes.

TCP_Message(TCP_Message msg)
Copy constructor used with retransmission: copies the prepended IpHeader's fields SOURCE_IP, DEST_IP, TOS, but NOT the TTL field, which is set to the default value.

Method Summary

int	bytecount() Returns the total number of bytes contained in this TCP packet (header + data).
long	getLastSEQ() Returns the sequence number of the last byte in this segment.
void	printMsg()

Methods inherited from class SSF.OS.TCP.TCP_Header

version

Methods inherited from class SSF.OS.ProtocolMessage

carryPayload, copy, dropHeader, dropPayload, frombytes, fromVersion, header_bytecount, payload, previous, size, tobytes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

seglen

public int seglen

segment length of this TCP message

Constructor Detail

TCP_Message

public TCP_Message(TCP_Header th,
                   int destAddr,
                   int len)

Construct a TCP message with TCP header th, including a prepended IpHeader with given destination IP address destAddr, source IP address set to -1, and virtual segment length len bytes. Obsolete.

TCP_Message

public TCP_Message(TCP_Header th,
                   int srcAddr,
                   int destAddr,
                   int len)

Construct a TCP message with TCP header th, including a prepended IpHeader with source IP address srcAddr, destination IP address destAddr, and virtual segment length len bytes. Modification here and in other SSF.OS.TCP classes by BJ Premore 9/22/00.

TCP_Message

public TCP_Message(TCP_Message msg)
            throws ProtocolException

Copy constructor used with retransmission: copies the prepended IpHeader's fields SOURCE_IP, DEST_IP, TOS, but NOT the TTL field, which is set to the default value. Fragile: should not be used except by SSF.OS.TCP. Modification by ato 9/24/00.

Method Detail

printMsg

public void printMsg()

getLastSEQ

public long getLastSEQ()

Returns the sequence number of the last byte in this segment.

bytecount

public int bytecount()

Returns the total number of bytes contained in this TCP packet (header + data).

Overrides:

bytecount in class TCP_Header