使用boost buffer序列化并使用UDP协议发送

Question

我想序列化并通过 UDP 协议发送一些数据。代码如下所示：

typedef struct{
   uint8_t a[2];
   uint8_t b;
}example;
std::vector<example> ex_vector; //Filling part of this vector is notgiven here

void sendUDP(){
    int sockfd;
    sockfd = socket(AF_INET,SOCK_DGRAM,0);
    struct sockaddr_in serv;

    serv.sin_family = AF_INET;
    serv.sin_port = htons(5005);
    serv.sin_addr.s_addr = inet_addr("127.0.0.1");

    //const uint8_t buffer[2] = {0x12, 0x13}; -> Works well with this
    auto mutable_buffer = boost::asio::buffer(ex_vector);
    socklen_t m = sizeof(serv);
    sendto(sockfd,mutable_buffer,sizeof(mutable_buffer),0,(struct sockaddr *)&serv,m);
}

如何使用 boost 序列化 POD 元素 (example) 的向量？ UDP 代码取自 (http://www.cplusplus.com/forum/unices/76180/).

当前弹出错误：

no matching function for call to 'sendto'
    sendto(sockfd,mutable_buffer,sizeof(mutable_buffer),0,(struct sockaddr *)&serv,m);

Answer 1

来自 boost::asio::buffer 的文档：

The contents of a buffer may be accessed using the data() and size() member functions:
boost::asio::mutable_buffer b1 = ...;
std::size_t s1 = b1.size();
unsigned char* p1 = static_cast<unsigned char*>(b1.data());

（不过，我想知道你为什么混合使用 boost 和 posix，boost 有 boost::asio::ip::udp::socket 应该可以完美地与缓冲区一起工作，并且互联网上应该可以找到示例）

使用boost buffer序列化并使用UDP协议发送

Using boost buffer to serialize and send using UDP protocol

c++

boost

udp