一.python实现ping返回延迟繁琐版

#!/usr/bin/python3.7# !coding:utf-8__author__ = 'hsz'__date__ = 'Thu Feb 27 22:41:15 EST 2020'import timeimport structimport socketimport selectimport sysdef chesksum(data): """ 校验 """ n = len(data) m = n % 2 sum = 0 for i in range(0, n - m, 2): sum += (data[i]) + ((data[i + 1]) << 8) # 传入data以每两个字节（十六进制）通过ord转十进制，第一字节在低位，第二个字节在高位 if m: sum += (data[-1]) # 将高于16位与低16位相加 sum = (sum >> 16) + (sum & 0xffff) sum += (sum >> 16) # 如果还有高于16位，将继续与低16位相加 answer = ~sum & 0xffff # 主机字节序转网络字节序列（参考小端序转大端序） answer = answer >> 8 | (answer << 8 & 0xff00) return answer ''' 连接套接字,并将数据发送到套接字 '''def raw_socket(dst_addr, imcp_packet): rawsocket = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.getprotobyname("icmp")) send_request_ping_time = time.time() # send data to the socket rawsocket.sendto(imcp_packet, (dst_addr, 80)) return send_request_ping_time, rawsocket, dst_addr ''' request ping '''def request_ping(data_type, data_code, data_checksum, data_ID, data_Sequence, payload_body): # 把字节打包成二进制数据 imcp_packet = struct.pack('>BBHHH32s', data_type, data_code, data_checksum, data_ID, data_Sequence, payload_body) icmp_chesksum = chesksum(imcp_packet) # 获取校验和 imcp_packet = struct.pack('>BBHHH32s', data_type, data_code, icmp_chesksum, data_ID, data_Sequence, payload_body) return imcp_packet ''' reply ping '''def reply_ping(send_request_ping_time, rawsocket, data_Sequence, timeout=2): while True: started_select = time.time() what_ready = select.select([rawsocket], [], [], timeout) wait_for_time = (time.time() - started_select) if what_ready[0] == []: # Timeout return -1 time_received = time.time() received_packet, addr = rawsocket.recvfrom(1024) icmpHeader = received_packet[20:28] type, code, checksum, packet_id, sequence = struct.unpack( ">BBHHH", icmpHeader ) if type == 0 and sequence == data_Sequence: return time_received - send_request_ping_time timeout = timeout - wait_for_time if timeout <= 0: return -1 ''' 实现 ping 主机/ip '''def ping(host): data_type = 8 # ICMP Echo Request data_code = 0 # must be zero data_checksum = 0 # "...with value 0 substituted for this field..." data_ID = 0 # Identifier data_Sequence = 1 # Sequence number payload_body = b'abcdefghijklmnopqrstuvwabcdefghi' # data dst_addr = socket.gethostbyname(host) # 将主机名转ipv4地址格式，返回以ipv4地址格式的字符串，如果主机名称是ipv4地址，则它将保持不变 print("正在 Ping {0} [{1}] 具有 32 字节的数据:".format(host, dst_addr)) for i in range(0, 4): icmp_packet = request_ping(data_type, data_code, data_checksum, data_ID, data_Sequence + i, payload_body) send_request_ping_time, rawsocket, addr = raw_socket(dst_addr, icmp_packet) times = reply_ping(send_request_ping_time, rawsocket, data_Sequence + i) if times > 0: print("来自 {0} 的回复: 字节=32 时间={1}ms".format(addr, int(times * 1000))) time.sleep(0.7) else: print("请求超时。")if __name__ == "__main__": # if len(sys.argv) < 2: # sys.exit('Usage: ping.py <host>') ping('')

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