Bridge网络模式下Linux虚拟机和主机进行通信

#include <sys/types.h>  
#include <sys/socket.h>  
#include <arpa/inet.h>  
#include <stdio.h>  
#define BUFLEN 255  
  
int main(int argc, char **argv)  
{  
    struct sockaddr_in peeraddr, localaddr;  
    int sockfd;  
    char recmsg[BUFLEN+1];  
    int socklen, n;  
  
    if(argc!=5){  
        printf("%s <dest IP address> <dest port> <source IP address> <source port>\n", argv[0]);  
        exit(0);  
    }  
  
    sockfd = socket(AF_INET, SOCK_DGRAM, 0);  
    if(sockfd<0){  
        printf("socket creating err in udptalk\n");  
        exit(1);  
    }  
     printf("IP address Checking!\n");  
    socklen = sizeof(struct sockaddr_in);  
    memset(&peeraddr, 0, socklen);  
    peeraddr.sin_family=AF_INET;  
    peeraddr.sin_port=htons(atoi(argv[2]));  
    if(inet_pton(AF_INET, argv[1], &peeraddr.sin_addr)<=0){  
        printf("Wrong dest IP address!\n");  
        exit(0);  
    }  
    memset(&localaddr, 0, socklen);  
    localaddr.sin_family=AF_INET;  
    if(inet_pton(AF_INET, argv[3], &localaddr.sin_addr)<=0){  
        printf("Wrong source IP address!\n");  
        exit(0);  
    }  
    printf("try to bind local address \n");  
    localaddr.sin_port=htons(atoi(argv[4]));  
    if(bind(sockfd, &localaddr, socklen)<0){   
        printf("bind local address err in udptalk!\n");  
        exit(2);  
    }  
 printf("Please Type Some Message To Server\n");    
    if(fgets(recmsg, BUFLEN, stdin) == NULL) {
        printf("get nothing exit\n"); 
        exit(0);
    }  
 //    printf("end of fgets \n");  
    if(sendto(sockfd, "HELLO", strlen("HELLO"), 0, &peeraddr, socklen)<0){  
        printf("sendto err in udptalk!\n");  
        exit(3);  
    }  
 printf("end of sendto \n");  
      printf("start of recv&send message loop!\n");  
    for(;;){  
        /*recv&send message loop*/  
        printf("Waiting For Message...!\n");  
        n = recvfrom(sockfd, recmsg, BUFLEN, 0, &peeraddr, &socklen);  
        if(n<0){  
            printf("recvfrom err in udptalk!\n");  
            exit(4);  
        }else{  
            recmsg[n]=0;  
            printf("peer:%s\n", recmsg);    
        }  
     printf("Please Type Some Message To Server\n");    
        if(fgets(recmsg, BUFLEN, stdin) == NULL) exit(0);  
        if(sendto(sockfd, recmsg, strlen(recmsg), 0, &peeraddr, socklen)<0){  
            printf("sendto err in udptalk!\n");  
            exit(3);  
        }  
    }  
}