不能设置IP_TTLand IP_TOS setsockopt的

Question

我已经定义了一个UDP套接字

#include<iostream> 
#include<WinSock2.h> 
sockaddr_in faraddr; 
     memset(&faraddr, 0, sizeof(sockaddr_in)); 
     unsigned short Port = 6789; 
     faraddr.sin_family  = AF_INET; 
     faraddr.sin_port  = htons(Port); 
     faraddr.sin_addr.s_addr = inet_addr(Loopbackaddress); 
     SOCKET XmitSocket; 
     XmitSocket = socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP); 
      if (XmitSocket < 0) 
      { 
       printf("Socket Creation Failed\n"); 
      } 
    int nBuffersize = 1024 * 1024; 
    uint8 nOptVal = 255; 
    setsockopt(XmitSocket,IPPROTO_IP,IP_TTL, (const char*)&nOptVal, 1); 

// 标识符IP_TTL不确定

setsockopt(XmitSocket,SOL_SOCKET,SO_SNDBUF, (const char*)&nBuffersize, 4); 

    int prio = 6 << 5;//First 3 bits of TOS field 
    setsockopt(XmitSocket, SOL_IP, IP_TOS, &prio, sizeof(prio)); 

// 标识符SOL_IP和IP_TOS未定义

我得到编译错误我错过了一些HeaderFile

Answer 1

#include <Ws2tcpip.h> 

看来你错过了一些头文件。详细信息请参见MSDN。