从网络C++接收数据

Question

我有一个python函数，可以通过数据报套接字通过网络发送数据。在接收器端，我必须使用 c++ 来接收该数据，但接收器无法接收任何有意义的数据。应该使用什么来获取发送的确切格式的字符串？

蟒蛇代码

def send(self, command):
        segments = command.split() # split command on spaces
        if len(segments) < 5 or segments[1] not in self.hosts or segments[2] not in self.hosts: # sanity check
            print('invalid arguments')
            return
        else:
            h1 = map(int, segments[1].split('.'))# segment 1 contains a IP address
            h2 = map(int, segments[2].split('.'))# segment 2 contains an IP address
            fmt = '4s4B4Bh' + segments[3] + 's'# segemt 3 is string length segment 4 is a string
            buf = struct.pack(fmt, segments[0], h1[0], h1[1], h1[2], h1[3], h2[0], h2[1], h2[2], h2[3], int(segments[3]), ' '.join(segments[4:]))
            print('sending to {0}'.format(segments[1])) # print a message before sending to source
            self.s.sendto(buf, (segments[1], self.port)) # send to source
            #self.s.sendto(command, (segments[1], self.port)) # send to source

C++代码

bytes_received = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr*) &client_address, &addrlen);
        //print(buffer);
        if(bytes_received==-1)
        {
            perror("recvfrom");
            printf("error %sn",strerror(errno));
        }
        printf("[%s:%hu]: %s n", inet_ntoa(client_address.sin_addr), ntohs(client_address.sin_port), buffer);

正确创建所有套接字

Answer 1

如果您收到类似"发送???????"的内容我希望在发送过程中会出现编码问题。"？"是0x3F(dec 63(，通常来自基本ASCII(小于127(表中的字符。我不熟悉 python，但你能确保在将 python 字符串转换为字节数组时使用正确的(例如 UTF-8，肯定不是 UTF-16/32，也许不是 ASCII(编码吗？