CS 145A Lab 2 (due: Nov 7th)
Assume there is no ¡°packet corruption¡± ("packet corruption": Bit error inside a packet. Bit error can be detected or even corrected by checksum. Details about error correcting codes can be found in EE127.)
The parameter format of the sender is: "sender <filename> <PacketSize>", where <filename> is the name of the file for "transmission", <PacketSize> is the maximum size of a packet (including header). The size of the file is smaller than 64M bytes. The file contains English characters and numbers only.
The sender should implement the following functions:
The parameter format of the receiver is: "receiver <number of ¡°packets¡±> <PacketSize> <filename>", where <number of "packets"> is number of files for packets "received" by the receiver side. The files are in order of: "P0000001.txt", "P0000002.txt"... However, the packet in each file may not be the same packet "sent" by the sender, due to "packet loss", "packet reordering" and/or "packet duplication". <filename> is the file that the receiver should write to.
The receiver should implement the following functions:
Assume we have a file with 7 characters: ¡°abcdefg¡±. The Packet Size is 10 bytes.
If the packet header in your design has a size of 7 bytes, the payload of each packet is 3 bytes.
So, the sender should output 3 files:
P0000001.txt: <header>+ ¡°abc¡±
P0000002.txt: <header>+ ¡°def¡±
P0000003.txt: <header>+ ¡°g¡±
If these three files are provided to the receiver without change, the receiver should output a file with 7 characters "abcdefg".
If packet 1 is lost, the receiver will see:
P0000001.txt: <header>+ ¡°def¡±
P0000002.txt: <header>+ ¡°g¡±
(Note that the file names are still sequent numbers.)
The receiver should output a file with 5 characters: "#defg". "#" indicates a packet loss.
Please submit your codes in "sender.c","receiver.c" or "sender.cpp","receiver.cpp",
and your documents in "readme.txt"