taniomi/redes

Repositório para tarefas da matéria de Redes. 2023-2

Redes de Computadores

Tarefa 1 | TCP - Transmission Control Protocol

Implementation of TCP connection with python and socket module.

Tarefa 2 | TCP & HTTP

Implementação baseada na Tarefa 1, com servidor que serve arquivos HTML e imagens.

Tarefa 3 | UDP - User Datagram Protocol

Implementação de cliente e servidor UDP. Servidor deve enviar arquivos e separá-los em batches.

Deve-se definir o tamanho do buffer do servidor e do cliente.

Servidor deve ter checksum.

Cliente deve ser capaz de descartar partes do arquivo, para simular perda de dados e testar mecanismo de recuperação de dados. Cliente deve receber, montar e conferir o checksum do arquivo recebido do servidor.

redes's Issues

[Tarefa3] Client not showing msg of file received at desired moment

[Tarefa 3] Error receiving file in client

Outputs from client:

[SEND] Enter message to send (or "exit" to quit): FILE docs/joke.txt
[FILE] Receiving file: joke.txt
[ERROR] Error while receiving file: write() argument must be str, not bytes
[SEND] Enter message to send (or "exit" to quit): FILE docs/joke.txt
[ERROR] Error: not enough values to unpack (expected 2, got 1)

Prob issue with function receive_file()

[Tarefa3] If packet_size != 1024 in client and/or server, .txt file transfer doesn't work

If packet_size == 1024 in client AND in server, file transfer works fine.
Client:
[FILE] File received: joke.txt

If packet_size == 1024 in client and == 64 in server, file transfer gives this error in server:
Server:
[ERROR] Error: a bytes-like object is required, not 'str'

[Tarefa3] Client stuck after sending message that's not a request

Client output:

[SEND] Enter message to send (or "exit" to quit): hello
_ # stuck here

Server receives message and continues listening normally.
Client is stuck.

[Tarefa3] Add adjust server buffer dinamically with packet loss