udp测试程序

服务器：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>

int port = 6789;

int main(int argc, char *agrv[])
{
    int fdSock;
    fdSock = socket(AF_INET, SOCK_DGRAM, 0);

    struct sockaddr_in address;
    bzero(&address, sizeof(address));
    address.sin_family = AF_INET;
    address.sin_port = htons(port);
    address.sin_addr.s_addr = htonl(INADDR_ANY); //inet_addr("127.0.0.1");

    char buf[80];
    sprintf(buf, "Are you OK ?");

    while(1)
    {
        sendto(fdSock, buf, sizeof(buf), 0, (struct sockaddr*)&address, sizeof(address));
        sleep(3);
        printf("send: %s\n", buf);
    }

    return 0;
}