一个判断远程主机存活程序代码(ping) #include #include #include #include #include "winsock.h" #pragma comment(lib,"Ws2_32"); #define SEND_SIZE 32 #define PACKET_SIZE 4096 #define ICMP_ECHO 8 #define ICMP_ECHOREPLY 0 struct icmp {

tcp udp 网络编程源码 //创建套接字 sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) if(INVALID_SOCKET == sHost) { printf("socket failed!\n") WSACleanup() //释放套接字资源 return -1 } //设置服务器地址 servAddr.sin_family =AF_INET servA