60 lines
1.4 KiB
Python
60 lines
1.4 KiB
Python
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#!/usr/bin/env python3
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#netinterface.py
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import os, time
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class network_interface:
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timeout = 0.800 # 800 millisec
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addr_space = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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own_addr = ''
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net_path = ''
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last_read = -1
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def __init__(self, path, addr):
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self.net_path = path
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self.own_addr = addr
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addr_dir = self.net_path + self.own_addr
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if not os.path.exists(addr_dir):
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os.mkdir(addr_dir)
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os.mkdir(addr_dir + '/IN')
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os.mkdir(addr_dir + '/OUT')
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in_dir = addr_dir + '/IN'
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msgs = sorted(os.listdir(in_dir))
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self.last_read = len(msgs) - 1
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def send_msg(self, dst, msg):
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out_dir = self.net_path + self.own_addr + '/OUT'
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msgs = sorted(os.listdir(out_dir))
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if len(msgs) > 0:
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last_msg = msgs[-1].split('--')[0]
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next_msg = (int.from_bytes(bytes.fromhex(last_msg), byteorder='big') + 1).to_bytes(2, byteorder='big').hex()
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else:
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next_msg = '0000'
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next_msg += '--' + dst
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with open(out_dir + '/' + next_msg, 'wb') as f: f.write(msg)
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return True
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def receive_msg(self, blocking=False):
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in_dir = self.net_path + self.own_addr + '/IN'
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status = False
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msg = b''
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while True:
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msgs = sorted(os.listdir(in_dir))
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if len(msgs) - 1 > self.last_read:
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with open(in_dir + '/' + msgs[self.last_read + 1], 'rb') as f: msg = f.read()
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status = True
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self.last_read += 1
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if not blocking or status: return status, msg
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else: time.sleep(self.timeout)
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