TCPReceiver Class Reference

The "receiver" part of a TCP implementation. More...

#include <tcp_receiver.hh>

Public Member Functions
	TCPReceiver (const size_t capacity)
	Construct a TCP receiver. More...
void	segment_received (const TCPSegment &seg)
	handle an inbound segment More...
size_t	unassembled_bytes () const
	number of bytes stored but not yet reassembled More...
Accessors to provide feedback to the remote TCPSender
std::optional< WrappingInt32 >	ackno () const
	The ackno that should be sent to the peer. More...
size_t	window_size () const
	The window size that should be sent to the peer. More...
"Output" interface for the reader
ByteStream &	stream_out ()
const ByteStream &	stream_out () const

Private Attributes
size_t	_capacity
	The maximum number of bytes we'll store. More...
StreamReassembler	_reassembler
	Our data structure for re-assembling bytes. More...

Detailed Description

The "receiver" part of a TCP implementation.

Receives and reassembles segments into a ByteStream, and computes the acknowledgment number and window size to advertise back to the remote TCPSender.

Definition at line 16 of file tcp_receiver.hh.

Constructor & Destructor Documentation

TCPReceiver()

TCPReceiver::TCPReceiver ( const size_t  capacity )

inline

Construct a TCP receiver.

Parameters

capacity

the maximum number of bytes that the receiver will store in its buffers at any give time.

Definition at line 28 of file tcp_receiver.hh.

Member Function Documentation

ackno()

optional< WrappingInt32 > TCPReceiver::ackno

(

)

const

The ackno that should be sent to the peer.

Returns

empty if no SYN has been received

This is the beginning of the receiver's window, or in other words, the sequence number of the first byte in the stream that the receiver hasn't received.

Definition at line 17 of file tcp_receiver.cc.

segment_received()

void TCPReceiver::segment_received

(

const TCPSegment &

seg

)

handle an inbound segment

Definition at line 13 of file tcp_receiver.cc.

stream_out() [1/2]

ByteStream& TCPReceiver::stream_out ( )

inline

Definition at line 61 of file tcp_receiver.hh.

stream_out() [2/2]

const ByteStream& TCPReceiver::stream_out ( ) const

inline

Definition at line 62 of file tcp_receiver.hh.

unassembled_bytes()

size_t TCPReceiver::unassembled_bytes ( ) const

inline

number of bytes stored but not yet reassembled

Definition at line 54 of file tcp_receiver.hh.

window_size()

size_t TCPReceiver::window_size

(

)

const

The window size that should be sent to the peer.

Operationally: the capacity minus the number of bytes that the TCPReceiver is holding in its byte stream (those that have been reassembled, but not consumed).

Formally: the difference between (a) the sequence number of the first byte that falls after the window (and will not be accepted by the receiver) and (b) the sequence number of the beginning of the window (the ackno).

Definition at line 19 of file tcp_receiver.cc.

Member Data Documentation

_capacity

size_t TCPReceiver::_capacity

private

The maximum number of bytes we'll store.

Definition at line 21 of file tcp_receiver.hh.

_reassembler

StreamReassembler TCPReceiver::_reassembler

private

Our data structure for re-assembling bytes.

Definition at line 18 of file tcp_receiver.hh.

---

The documentation for this class was generated from the following files:

• /home/cs144/sponge/libsponge/tcp_receiver.hh
• /home/cs144/sponge/libsponge/tcp_receiver.cc