组播

来源：互联网发布：淘宝毛毛仔体育正吗编辑：程序博客网时间：2024/05/04 11:22

关于消息队列的使用

http://www.cnblogs.com/chenpingzhao/p/5262050.html

消息队列采用高可用，可持久化的消息中间件。比如Active MQ，Rabbit MQ，Rocket Mq。

ZeroMQ

号称史上最快的消息队列

性能对比见http://blog.csdn.net/abcd1f2/article/details/47318693

ZeroMQ的C版本nanomsg

Sender.cpp

#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <time.h>#include <string.h>#include <stdio.h>#include <unistd.h>#define HELLO_PORT 12345#define HELLO_GROUP "225.0.0.37"int main(int argc, char *argv[]){struct sockaddr_in addr;int fd, cnt;struct ip_mreq mreq;char *message="Hello, World!";/* create what looks like an ordinary UDP socket */if ((fd=socket(AF_INET,SOCK_DGRAM,0)) < 0) {perror("socket");exit(1);}/* set up destination address */memset(&addr,0,sizeof(addr));addr.sin_family=AF_INET;addr.sin_addr.s_addr=inet_addr(HELLO_GROUP);addr.sin_port=htons(HELLO_PORT);/* now just sendto() our destination! */while (1){if (sendto(fd,message, strlen(message), 0, (struct sockaddr *) &addr, sizeof(addr)) < 0) {perror("sendto");exit(1);}sleep(1);}}

Recver.cpp 文件内容如下：

#include <stdlib.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <arpa/inet.h>#include <time.h>#include <string.h>#include <stdio.h>#include <unistd.h>#define HELLO_PORT  12345#define HELLO_GROUP "225.0.0.37"#define MSGBUFSIZE 256int main(int argc, char *argv[]){struct sockaddr_in addr;int fd, nbytes,addrlen;struct ip_mreq mreq;char msgbuf[MSGBUFSIZE];u_int yes=1; /*** MODIFICATION TO ORIGINAL *//* create what looks like an ordinary UDP socket */if ((fd=socket(AF_INET,SOCK_DGRAM,0)) < 0) {perror("socket");exit(1);}/**** MODIFICATION TO ORIGINAL *//* allow multiple sockets to use the same PORT number */if (setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(yes)) < 0) {perror("Reusing ADDR failed");exit(1);}/*** END OF MODIFICATION TO ORIGINAL *//* set up destination address */memset(&addr,0,sizeof(addr));addr.sin_family=AF_INET;addr.sin_addr.s_addr=htonl(INADDR_ANY); /* N.B.: differs from sender */addr.sin_port=htons(HELLO_PORT);/* bind to receive address */if (bind(fd,(struct sockaddr *) &addr,sizeof(addr)) < 0){perror("bind");exit(1);}/* use setsockopt() to request that the kernel join a multicast group */mreq.imr_multiaddr.s_addr=inet_addr(HELLO_GROUP);mreq.imr_interface.s_addr=htonl(INADDR_ANY);if (setsockopt(fd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(mreq)) < 0) {perror("setsockopt");exit(1);}/* now just enter a read-print loop */while (1) {addrlen=sizeof(addr);if ((nbytes=recvfrom(fd,msgbuf,MSGBUFSIZE,0, (struct sockaddr *) &addr,(socklen_t*)&addrlen)) < 0) {perror("recvfrom");exit(1);}puts(msgbuf);}return 0;}

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