Receiving data, hexidecimal array, from Python script over socket in C

See more:

C

Python

I'm attempting to receive data over a socket connection from a python script. I seem to be failing in how to receive this data.

intreadETH(intsock, char **msg){
    printf("Read\n");
    int n;
    *msg = (char *)malloc(sizeof(char) * 256);
    bzero(*msg, 256);
    n = read(sock, *msg, 255);
    return n;
}

Its a simple read function.

I've successfully passed a message from the host computer(python) to the server(C) with a simple message. My python code is just for testing right now.

import socket
import time

HOST = '192.168.99.149'  # The server's hostname or IP address
PORT = 8080        # The port used by the server

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    time.sleep(2)
    s.sendall(b'Hello, world\r')
     s.detach()
     s.close()

This works, the server receives the full message "Hello, world" with no issues. I can then send the message as many times as I want with no issues.

What I have tried:

Now if I change the python script to look like this.

import socketimport time

HOST = '192.168.99.149'  # The server's hostname or IP address
PORT = 8080        # The port used by the server

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:

s.connect((HOST, PORT))
    time.sleep(2)
    packet = bytearray()
    packet.append(0xBF)
    packet.append(0xAB)
    packet.append(0xCD)
    packet.append(0xEF)
    packet.append(0x0D)
    
    bytePacket = bytes(packet)
    s.sendall(bytePacket)
    time.sleep(2)
    s.detach()
    s.close()

Both the original script and this updated script is sending messages of type bytes with a return carriage. So they look, and think, they are identical on the python side. However, I feel like on the server(C) side, they are different.

when I send the message I get what looks like four overlappting diamonds with ? in each of them.

I've attempted to make changes to the print statement, but I get warnings if I change the print statement to %d, %x, or %c. Thinking the formatter just needed to be changed.

Does anyone have any insight as to what I'm missing.