PROJECT 1: DHCP
===============


   0                   1                   2                   3
   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     op (1)    |   htype (1)   |   hlen (1)    |   hops (1)    |
   +---------------+---------------+---------------+---------------+
   |                            xid (4)                            |
   +-------------------------------+-------------------------------+
   |           secs (2)            |           flags (2)           |
   +-------------------------------+-------------------------------+
   |                          ciaddr  (4)                          |
   +---------------------------------------------------------------+
   |                          yiaddr  (4)                          |
   +---------------------------------------------------------------+
   |                          siaddr  (4)                          |
   +---------------------------------------------------------------+

op     = BOOTREQUEST=1 from client; BOOTREPLY=2 from server
htype  = 1
hlen   = 6
hops   = 0
xid    = monotonically increasing from client to server and server copies this
         in the reply so client can match request with reply
secs   = 0
flags  = 0
ciaddr = local IP address of client
yiaddr = zero from client to server; copied from ciaddr by server when
         replying to client
siaddr = server IP address

The project is to create server and client processes that will exchange
messages of the format given above. Accept a command line argument on how
many messages are to be exchanged between one client and server and send
the message that many times with a gap of a few seconds (also a command line
argument). Then, in the client, print the reply from
the server to the console. Give the client ID (have different client IDs
for different clients) when printing the replies.

Group 8 :
Implement as TCP Concurrent server with processes

Group 5 :
Implement as TCP Concurrent server with threads

Group 11 :
Implement as TCP iterative server with select to handle multiple connections