目录
本地套接字
TCP\UDP实现不同主机、网络通信
本地套接字实现本地的进程间的通信，类似的，一般采用TCP的通信流程
生成套接字文件
cpp
#include<arpa/inet.h>
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<sys/un.h>
int main(){
unlink("client.sock");
//1.创建套接字
int cfd=socket(AF_LOCAL,SOCK_STREAM,0);
if(cfd==-1){
perror("socket");
exit(-1);
}
//2.绑定本地套接字文件
struct sockaddr_un addr;
addr.sun_family=AF_LOCAL;
strcpy(addr.sun_path,"client.sock");
int ret=bind(cfd,(struct sockaddr *)&addr,sizeof(addr));
if(ret==-1){
perror("bind");
exit(-1);
}
//3.连接服务器
struct sockaddr_un seraddr;
seraddr.sun_family=AF_LOCAL;
strcpy(seraddr.sun_path,"server.sock");
ret=connect(cfd,(struct sockaddr *)&seraddr,sizeof(addr));
if(ret==-1){
perror("connect");
exit(-1);
}
//4.通信
int num=0;
while(1){
char buf[128];
sprintf(buf,"hello,i am client:%d\n",num++);
send(cfd,buf,strlen(buf)+1,0);
printf("clientsay:%s\n",buf);
//接收数据
int len=recv(cfd,buf,sizeof(buf),0);
if(len==-1){
perror("recv");
exit(-1);
}else if(len==0){
printf("server closed...\n");
break;
}else if(len>0){
printf("server say:%s\n",buf);
}
sleep(1);
}
close(cfd);
return 0;
}
cpp
#include<arpa/inet.h>
#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<sys/un.h>
int main(){
unlink("server.sock");
//1.创建套接字
int lfd=socket(AF_LOCAL,SOCK_STREAM,0);
if(lfd==-1){
perror("socket");
exit(-1);
}
//2.绑定本地套接字文件
struct sockaddr_un addr;
addr.sun_family=AF_LOCAL;
strcpy(addr.sun_path,"server.sock");
int ret=bind(lfd,(struct sockaddr *)&addr,sizeof(addr));
if(ret==-1){
perror("bind");
exit(-1);
}
//3.监听
ret=listen(lfd,100);
if(ret==-1){
perror("listen");
exit(-1);
}
//4.等待客户端连接
struct sockaddr_un cliaddr;
int len=sizeof(cliaddr);
int cfd=accept(lfd,(struct sockaddr *)&cliaddr,&len);
if(cfd==-1){
perror("accepr");
exit(-1);
}
printf("client socket filename:%s\n",cliaddr.sun_path);
//5.通信
while(1){
char buf[128];
int len=recv(cfd,buf,sizeof(buf),0);
if(len==-1){
perror("recv");
exit(-1);
}else if(len==0){
printf("client closed...\n");
break;
}else if(len>0){
printf("client say:%s\n",buf);
send(cfd,buf,len,0);
}
}
close(cfd);
close(lfd);
return 0;
}