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Write some java code

$10-30 USD

Closed
Posted over 6 years ago

$10-30 USD

Paid on delivery
I need you to develop some software for me. I would like this software to be developed using Java. I need some one to this on java SR sender Sliding Window – Selective-Repeat 1. Get Input: if any there is any input from the users (chars or words) add to a list or queue private static ArrayBlockingQueue<Packet> queue; // Blocking version is thread save if there is not more input then once we have send off all the packets (and got acks) we are done so set a flag or something similar 2. Send Packets if input Queue has packets to send AND Sliding Window has slots send packets while (![login to view URL]()) AND (lastSent - snd_base < WINDOW_SIZE) do get a packet from input Queue (p = [login to view URL](); ) make datagram from p (Packet has method for this) send datagram ([login to view URL](datagram);) set timer and thread for resending (Packet has method for this) note the sequence number of the packet, we are going to have to wait for an acknowledgement add sseq_num to the Set Set_of_UnaAcked_Packets (Packet has method for this) Note the Set is a SortedSet<Integer> // ordered/sorted set 3. Receive Acknowledgements if Sliding Window has slots used slots (snd_base <= lastSent) try to get all possible acks make packet and datagram receive datagram ([login to view URL](datagram);) make packet from datagram (Packet has method) get sequence number from packet (rseq_num = [login to view URL]();) if sequence number too big then ignore packet (continue) if less than Window base (snd_base) then ignore packet (continue) if sequence number in-between snd_base and snd_base + WINDOW_SIZE then check if sequence number is in Set_of_UnaAcked_Packets if it is an unAcknowledged Packet then unschedule Thread resend task & timer (Packet) and see if we can move Windows base identify contiguous sequence of acknowledged packets and update Window base snd_base = largest sequence_number of contiguous acknowledged packets . starting with snd_base for example, if we received ack for 6 and had Set with {6 7 8 11 13} note set is a ordered set (sorted) then we would set snd_base to 8 and remove from 6, 7, and 8 from the Set if packet is ack for LAST (we sent our LAST packet and this is an ack for it) and Set is and queue are empty we are DONE SR receiver 1. Receive packet get packet sequence_number if sequence number is less that rcv_base then we have already received (and acknowledged) this packet but the sender has sent it again (lost ack?) so send an ACK packet again if sequence number is greater than rcv_base+WINDOW_SIXE -1 then it is outside windows, we just ignore it (continue) if sequence number is in between rcv_base and rcv_base+WINDOW_SIXE -1 then receiver’s window and we need to send a selective ACK packet If the packet was not previously received, it is buffered. (added to a small list) If this packet has a sequence number equal to the base of the receive window, then this packet, and any previously . buffered and consecutively numbered (beginning with rcv_base) packets are printed out (in order) And then receive window base (rcv_bas) is then moved forward by the number of packets printed For example if we have rcv_base=2 and received i packets 2, 3, 4, 6,8 can printout 2, 3, and 4 And set rcv_base to 5
Project ID: 15869169

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4 proposals
Remote project
Active 6 yrs ago

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4 freelancers are bidding on average $34 USD for this job
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Hi I am a professional software engineer I have +3 years experience in this field I have lots of expertise in Java and software development I will provide quality work according to your requirements we can discuss more about project over chat regards
$20 USD in 1 day
3.9 (14 reviews)
3.7
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hello I will be glad by working in this task I have many previous applications in Java development i have many previous applications related to this task requirements i can show some of them throw teamviewer app thank you Mohamed
$10 USD in 1 day
0.0 (0 reviews)
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We have experts on JAVA application development we working on Spring, Hibernate and Struts framework
$25 USD in 1 day
0.0 (0 reviews)
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