CS779/879

Assignment #5

Due Midnight, Wednesday April 20, 2011

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Write the following programs.

NAME

TSCServer – TCP/SCTP Chat Server

TSCClient – TCP/SCTP Chat Client

SYNOPSIS

TSCServer <port> <time-limit>

TSCClient <type> <host> <port> where <type> is one element of the set: { t4, t6, s4, s6, q4, q6}

DESCRIPTION

TSCServer

· The program creates two IPV6 sockets : a TCP socket and an SCTP socket and binds each to <port>.

· It accepts connections from any number of TCP or SCTP clients and any message recieved from any client is sent to all connected clients.

· If any client does not send a message in a period of <time-limit> seconds, it is disconnected.

· The program exit if there is no connected clients and no new connections in a period of <time-limit> seconds.

TSCClient

· The program is as a typical chat client: accept user input, send it to the server and receive messages from the server and display it to the user.

· The progarm behave according to the specified client type as :

t4 : TCP IPV4

t6 : TCP IPV6

s4 : SCTP STREAM IPV4

s6 : SCTP STREAM IPV6

q4 : SCTP SEQPACKET IPV4

q6 : SCTP SEQPACKET IPV6