[Protostar]Net 0

#include "../common/common.c"

#define NAME "net0"
#define UID 999
#define GID 999
#define PORT 2999

void run()
{
  unsigned int i;
  unsigned int wanted;

  wanted = random();

  printf("Please send '%d' as a little endian 32bit int\n", wanted);

  if(fread(&i, sizeof(i), 1, stdin) == NULL) {
      errx(1, ":(\n");
  }

  if(i == wanted) {
      printf("Thank you sir/madam\n");
  } else {
      printf("I'm sorry, you sent %d instead\n", i);
  }
}

int main(int argc, char **argv, char **envp)
{
  int fd;
  char *username;

  /* Run the process as a daemon */
  background_process(NAME, UID, GID); 
  
  /* Wait for socket activity and return */
  fd = serve_forever(PORT);

  /* Set the client socket to STDIN, STDOUT, and STDERR */
  set_io(fd);

  /* Don't do this :> */
  srandom(time(NULL));

  run();
}

코드

#!/usr/bin/env python

import socket
import struct

IP="172.16.184.152"
PORT=2999


# Create client socket and connect to the IP/PORT
s1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s1.connect((IP, PORT))

#x Receive data from the server
data = s1.recv(2048)
print data

number = int( data.split("'")[1] )
number_hex = hex(number)

number_le = struct.pack("I", number_le)[0]
number_hex_le2 = hex(number_le2)

print "Original number %s:, in hex format: %s" % (number, number_hex)
print "Little endian number %s:, in hex format: %s" % (number_le2, number_hex_le2)

# Send data to the server
s1.send(number_le)

# Receive data from the server
data = s1.recv(2048)
print data

# Close the socket
s1.close()