質問編集履歴
1
ソースコードの修正(ソケット生成部分などの追加)
test
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test
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@@ -16,29 +16,97 @@
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10つのクライアントからUDPを受信しようと考えているため，def main()内のfor処理を10回繰り返し，10個のタスクを生成しています．
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※主にソケット生成/受信/送信部分を見てもらえればよいと思います．
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```async.py
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import socket
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import
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import asyncio
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# socketの生成は省略
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async def recvDataOnUDP():
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-
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M_Group = "239.1.2.3"
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-
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LOCALHOST = socket.gethostbyname(socket.gethostname())
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PORT = 1234
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FILE_NAME = 'send.txt'
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# UDPソケットの設定
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udp_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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udp_sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF, socket.inet_aton(LOCALHOST))
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udp_sock.setsockopt(
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socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP,
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socket.inet_aton(M_Group) + socket.inet_aton(LOCALHOST)
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)
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# 自分の送ったマルチキャストパケットを自身で受け取らない
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udp_sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_LOOP, 0)
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udp_sock.bind(('', PORT))
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udp_sock.settimeout(5)
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# udp_sock.connect((M_Group, PORT))
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# TCPソケットの設定
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tcp_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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file_data = ""
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len_data = 0
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with open(FILE_NAME, 'r') as f:
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file_data = f.read()
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len_data = len(file_data)
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async def recv_loss_packet():
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print("time to wait for response...")
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try:
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res_data, (src_ip, src_port) = udp_sock.recvfrom(1024)
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print(f'src_ip: {src_ip}, src_port: {src_port}')
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# packet loss seq split
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recv_seq_ary = res_data.decode().split(",")
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recv_seq_ary.pop(-1)
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recv_seq_ary = list(map(int, recv_seq_ary))
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print(recv_seq_ary)
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# packet loss data resend
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tcp
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tcp_sock.connect((src_ip, src_port))
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for i in recv_seq_ary:
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chunk = file_data[i*10:i*10+10]
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chunk = str(i) + ":" + chunk
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print(chunk)
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tcp
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tcp_sock.send(chunk.encode())
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except:
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print(f"Timeout!")
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async def main():
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count = 0
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# データを指定バイトごとに分割
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chunks = [file_data[i:i+10] for i in range(0, len_data, 10)]
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for chunk in chunks:
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count+=1
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chunk = str(count) + ":" + chunk
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print(chunk)
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udp_sock.sendto(chunk.encode(), (M_Group, PORT))
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time.sleep(0.05)
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for i in range(10):
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#タスクを生成する
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asyncio.create_task(recv_loss_packet())
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await asyncio.sleep(10)
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asyncio.run(main())
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```
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### 試したこと
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