3_12b_ipv6_echo_client.py 文件源码

def ipv6_echo_client(port, host=HOST):
    for res in socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
        af, socktype, proto, canonname, sa = res
        try:
            sock = socket.socket(af, socktype, proto)
        except socket.error as err:
            print ("Error:%s" %err)
        try:
            sock.connect(sa)
        except socket.error as msg:
            sock.close()
            continue
    if sock is None:
        print ('Failed to open socket!')
        sys.exit(1)
    msg = "Hello from ipv6 client"
    print ("Send data to server: %s" %msg)
    sock.send(bytes(msg.encode('utf-8')))
    while True:
        data = sock.recv(BUFSIZE)
        print ('Received from server', repr(data))
        if not data: 
            break
    sock.close()