多进程并发服务器
#include<myhead.h>
#define SER_IP "192.168.125.54"
#define SER_PORT 8888
void handler(int signo)
{
if(signo==SIGCHLD)
{
while(waitpid(-1,NULL,WNOHANG)>0);
}
}
int main(int argc, char *argv[])
{
//将SIGCHLD信号与处理函数绑定
if(signal(SIGCHLD,handler)==SIG_ERR)
{
perror("signal");
return -1;
}
//创建套接字
int sfd=socket(AF_INET,SOCK_STREAM,0);
if(sfd==-1)
{
perror("socket");
return -1;
}
printf("socket success sfd=%d\n",sfd);
//端口快速重用
int reuse=1;
if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))==-1)
{
perror("setsockopt");
return -1;
}
printf("端口号快速重用成功\n");
//绑定ip地址和端口
//填充地址信息结构体
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(SER_PORT);
sin.sin_addr.s_addr=inet_addr(SER_IP);
//绑定
if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin))==-1)
{
perror("bind");
return -1;
}
printf("bind success\n");
//将套接字设置成被动监听状态
if(listen(sfd,128)==-1)
{
perror("listen");
return -1;
}
printf("listen success\n");
//阻塞等待客户端连接
struct sockaddr_in cin;
socklen_t socklen=sizeof(cin);
while(1)
{
int newfd=accept(sfd,(struct sockaddr*)&cin,&socklen);
if(newfd==-1)
{
perror("accept");
return -1;
}
printf("[%s:%d]:已连接,newfd=%d\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd);
pid_t pid=fork();
if(pid>0)
{
//accept创了一个newfd,父进程中不使用,关闭
close(newfd);
}else if(pid==0)
{
//数据通信
char rbuf[128]="";
while(1)
{
bzero(rbuf,sizeof(rbuf));
int ret = recv(newfd,rbuf,sizeof(rbuf),0);
if(ret==0)
{
printf("客户端已下线\n");
break;
}
printf("[%s:%d]:%s\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),rbuf);
strcat(rbuf,"*_*");
send(newfd,rbuf,strlen(rbuf),0);
printf("发送成功\n");
}
close(newfd);
exit(EXIT_SUCCESS);
}
}
close(sfd);
return 0;
}
多线程并发服务器
#include<myhead.h>
#define SER_IP "192.168.125.54"
#define SER_PORT 8888
struct MsgInfo
{
int newfd;
struct sockaddr_in cin;
};
void* deal_cli_msg(void* arg)
{
//将传递进来的数据解析出来
int newfd=((struct MsgInfo*)arg)->newfd;
struct sockaddr_in cin=((struct MsgInfo*)arg)->cin;
//数据通信
char rbuf[128]="";
while(1)
{
bzero(rbuf,sizeof(rbuf));
int ret = recv(newfd,rbuf,sizeof(rbuf),0);
if(ret==0)
{
printf("客户端已下线\n");
break;
}
printf("[%s:%d]:%s\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),rbuf);
strcat(rbuf,"*_*");
send(newfd,rbuf,strlen(rbuf),0);
printf("发送成功\n");
}
close(newfd);
pthread_exit(NULL);
}
int main(int argc, char *argv[])
{
//创建套接字
int sfd=socket(AF_INET,SOCK_STREAM,0);
if(sfd==-1)
{
perror("socket");
return -1;
}
printf("socket success sfd=%d\n",sfd);
//端口快速重用
int reuse=1;
if(setsockopt(sfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))==-1)
{
perror("setsockopt");
return -1;
}
printf("端口号快速重用成功\n");
//绑定ip地址和端口
//填充地址信息结构体
struct sockaddr_in sin;
sin.sin_family=AF_INET;
sin.sin_port=htons(SER_PORT);
sin.sin_addr.s_addr=inet_addr(SER_IP);
//绑定
if(bind(sfd,(struct sockaddr*)&sin,sizeof(sin))==-1)
{
perror("bind");
return -1;
}
printf("bind success\n");
//将套接字设置成被动监听状态
if(listen(sfd,128)==-1)
{
perror("listen");
return -1;
}
printf("listen success\n");
//阻塞等待客户端连接
struct sockaddr_in cin;
socklen_t socklen=sizeof(cin);
while(1)
{
int newfd=accept(sfd,(struct sockaddr*)&cin,&socklen);
if(newfd==-1)
{
perror("accept");
return -1;
}
printf("[%s:%d]:已连接,newfd=%d\n",\
inet_ntoa(cin.sin_addr),ntohs(cin.sin_port),newfd);
//定义用于传参的变量
struct MsgInfo info={newfd,cin};
//创建分支线程用于通信
pthread_t tid=-1;
if(pthread_create(&tid,NULL,deal_cli_msg,&info)==-1)
{
printf("创建线程失败\n");
return -1;
}
//回收分支线程的资源
pthread_detach(tid);
}
close(sfd);
return 0;
}
流式域套接字
服务器端
#include<myhead.h>
int main(int argc, char *argv[])
{
//创建套接字
int sfd=socket(AF_UNIX,SOCK_STREAM,0);
if(sfd==-1)
{
perror("socket");
return -1;
}
printf("socket success sfd=%d\n",sfd);
//判断要绑定的套接字文件是否存在
if(access("./unix",F_OK)==0)
{
//说明文件存在,将其删除
if(unlink("./unix")!=0)
{
perror("unlink");
return -1;
}
}
//绑定ip地址和端口
//填充地址信息结构体
struct sockaddr_un sun;
sun.sun_family=AF_UNIX;
strcpy(sun.sun_path,"./unix");
//绑定
if(bind(sfd,(struct sockaddr*)&sun,sizeof(sun))==-1)
{
perror("bind");
return -1;
}
printf("bind success\n");
//将套接字设置成被动监听状态
if(listen(sfd,128)==-1)
{
perror("listen");
return -1;
}
printf("listen success\n");
//阻塞等待客户端连接
struct sockaddr_un cun;
socklen_t socklen=sizeof(cun);
int newfd=accept(sfd,(struct sockaddr*)&cun,&socklen);
if(newfd==-1)
{
perror("accept");
return -1;
}
printf("[%s]:已连接,newfd=%d\n",cun.sun_path,newfd);
//数据通信
char rbuf[128]="";
while(1)
{
bzero(rbuf,sizeof(rbuf));
int ret = recv(newfd,rbuf,sizeof(rbuf),0);
if(ret==0)
{
printf("客户端已下线\n");
break;
}
printf("[%s]:%s\n",cun.sun_path,rbuf);
strcat(rbuf,"*_*");
send(newfd,rbuf,strlen(rbuf),0);
printf("发送成功\n");
}
close(sfd);
close(newfd);
return 0;
}
客户端
#include<myhead.h>
int main(int argc, char *argv[])
{
int cfd=socket(AF_UNIX,SOCK_STREAM,0);
if(cfd==-1)
{
perror("socket");
return -1;
}
printf("socket success\n");
if(access("./linux",F_OK)==0)
{
if(unlink("./linux")!=0)
{
perror("unlink");
return -1;
}
}
//绑定ip地址和端口
//填充地址信息结构体
struct sockaddr_un cun;
cun.sun_family=AF_UNIX;
strcpy(cun.sun_path,"./linux");
//绑定
if(bind(cfd,(struct sockaddr*)&cun,sizeof(cun))==-1)
{
perror("bind");
return -1;
}
struct sockaddr_un sun;
sun.sun_family=AF_UNIX;
strcpy(sun.sun_path,"./unix");
if(connect(cfd,(struct sockaddr*)&sun,sizeof(sun))==-1)
{
perror("connect");
return -1;
}
printf("connect success\n");
char wbuf[128]="";
while(1)
{
printf("请输入>>>>");
fgets(wbuf,sizeof(wbuf),stdin);
wbuf[strlen(wbuf)-1]='\0';
if(strcmp(wbuf,"quit")==0)
{
break;
}
send(cfd,wbuf,strlen(wbuf),0);
bzero(wbuf,sizeof(wbuf));
recv(cfd,wbuf,sizeof(wbuf),0);
printf("收到消息为:%s\n",wbuf);
}
close(cfd);
return 0;
}
报式域套接字
服务器端
#include<myhead.h>
int main(int argc, char *argv[])
{
//创建套接字
int sfd=socket(AF_UNIX,SOCK_DGRAM,0);
if(sfd==-1)
{
perror("socket");
return -1;
}
printf("socket success sfd=%d\n",sfd);
//判断要绑定的套接字文件是否存在
if(access("./unix",F_OK)==0)
{
//说明文件存在,将其删除
if(unlink("./unix")!=0)
{
perror("unlink");
return -1;
}
}
//绑定ip地址和端口
//填充地址信息结构体
struct sockaddr_un sun;
sun.sun_family=AF_UNIX;
strcpy(sun.sun_path,"./unix");
//绑定
if(bind(sfd,(struct sockaddr*)&sun,sizeof(sun))==-1)
{
perror("bind");
return -1;
}
printf("bind success\n");
struct sockaddr_un cun;
socklen_t socklen=sizeof(cun);
//数据通信
char rbuf[128]="";
while(1)
{
bzero(rbuf,sizeof(rbuf));
recvfrom(sfd,rbuf,sizeof(rbuf),0,(struct sockaddr*)&cun,&socklen);
printf("[%s]:%s\n",cun.sun_path,rbuf);
strcat(rbuf,"*_*");
if(sendto(sfd,rbuf,sizeof(rbuf),0,(struct sockaddr*)&cun,sizeof(cun))==-1)
{
perror("sendto");
return -1;
}
printf("发送成功\n");
}
close(sfd);
return 0;
}
客户端
#include<myhead.h>
int main(int argc, char *argv[])
{
int cfd=socket(AF_UNIX,SOCK_DGRAM,0);
if(cfd==-1)
{
perror("socket");
return -1;
}
printf("socket success\n");
//判断要绑定的套接字文件是否存在
if(access("./linux",F_OK)==0)
{
//说明文件存在,将其删除
if(unlink("./linux")!=0)
{
perror("unlink");
return -1;
}
}
struct sockaddr_un cun;
cun.sun_family=AF_UNIX;
strcpy(cun.sun_path,"./linux");
if(bind(cfd,(struct sockaddr*)&cun,sizeof(cun))==-1)
{
perror("bind");
return -1;
}
struct sockaddr_un sun;
sun.sun_family=AF_UNIX;
strcpy(sun.sun_path,"./unix");
char wbuf[128]="";
while(1)
{
printf("请输入>>>>");
fgets(wbuf,sizeof(wbuf),stdin);
wbuf[strlen(wbuf)-1]=0;
sendto(cfd,wbuf,strlen(wbuf),0,(struct sockaddr*)&sun,sizeof(sun));
printf("发送成功\n");
recvfrom(cfd,wbuf,sizeof(wbuf),0,NULL,NULL);
printf("收到服务器消息:%s\n",wbuf);
}
close(cfd);
return 0;
}