UDP 多播服务模型

来源：互联网发布：mysql w10 编辑：程序博客网时间：2024/06/08 20:13

server.c

#include<errno.h>#include<semaphore.h>#include<string.h>#include<sys/stat.h>#include<fcntl.h>#include<errno.h>#include<stdlib.h>#include<unistd.h>#include<stdio.h>#include<sys/mman.h>#include<sys/types.h>#include<signal.h>#include<pthread.h>#include<netinet/in.h>#include<arpa/inet.h>#include<sys/socket.h>#include<net/if.h>#define SERVER_PORT 8000#define MAXLINE 1500#define GROUP "239.0.0.2"#define CLIENT_PORT 9000int main(){    struct sockaddr_in serveraddr,clientaddr;    int sockfd;    socklen_t clientlen;    char ipstr[INET_ADDRSTRLEN];    char buf[MAXLINE];    ssize_t len;    struct ip_mreqn group;    sockfd=socket(AF_INET,SOCK_DGRAM,0);    bzero(&serveraddr,sizeof(serveraddr));    serveraddr.sin_family=AF_INET;    serveraddr.sin_addr.s_addr=htonl(INADDR_ANY);    serveraddr.sin_port=htons(SERVER_PORT);    bind(sockfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr));    inet_pton(AF_INET,GROUP,&group.imr_multiaddr);    inet_pton(AF_INET,"0.0.0.0",&group.imr_address);    group.imr_ifindex=if_nametoindex("eno16777736");    setsockopt(sockfd,IPPROTO_IP,IP_MULTICAST_IF,        &group,sizeof(group));    bzero(&clientaddr,sizeof(clientaddr));    clientaddr.sin_family=AF_INET;    inet_pton(AF_INET,GROUP,&clientaddr.sin_addr.s_addr);    clientaddr.sin_port=htons(CLIENT_PORT);    while(fgets(buf,sizeof(buf),stdin)){        len=strlen(buf);        sendto(sockfd,buf,len,0,(struct sockaddr*)&clientaddr,sizeof(clientaddr));}    close(sockfd);    return 0;}

client.c

#include<errno.h>#include<semaphore.h>#include<string.h>#include<sys/stat.h>#include<fcntl.h>#include<errno.h>#include<stdlib.h>#include<unistd.h>#include<stdio.h>#include<sys/mman.h>#include<sys/types.h>#include<signal.h>#include<pthread.h>#include<netinet/in.h>#include<arpa/inet.h>#include<sys/socket.h>#include<net/if.h>#define SERVER_PORT 8000#define CLIENT_PORT 9000#define GROUP "239.0.0.2"#define MAXLINE 4096int main(int argc,char* argv[]){    struct sockaddr_in serveraddr,clientaddr;    int confd;    char buf[MAXLINE];    ssize_t len;    struct ip_mreqn group;    confd=socket(AF_INET,SOCK_DGRAM,0);    bzero(&clientaddr,sizeof(clientaddr));    clientaddr.sin_family=AF_INET;    inet_pton(AF_INET,"0,0,0,0",&clientaddr.sin_addr.s_addr);    clientaddr.sin_port=htons(CLIENT_PORT);    bind(confd,(struct sockaddr*)&clientaddr,sizeof(clientaddr));    inet_pton(AF_INET,GROUP,&group.imr_multiaddr);    inet_pton(AF_INET,"0.0.0.0",&group.imr_address);    group.imr_ifindex=if_nametoindex("eno16777736");    setsockopt(confd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&group,sizeof(group));    while(1){        len=recvfrom(confd,buf,sizeof(buf),0,NULL,0);        write(STDOUT_FILENO,buf,len);    }    close(confd);    return 0;}

0 0