多进程和多线程服务器端

于 2012-02-21 18:13:55 发布
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分类专栏： linux(unix)网络编程 文章标签： 多线程 服务器 struct server socket compiler
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/mazheng1989/article/details/7280700
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多进程服务器端：

/*
 * =====================================================================================
 *
 *       Filename:  MulProcServer.c
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2012年02月21日 00时49分26秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  MaZheng (blog.youkuaiyun.com/mazheng1989), mazheng19891019@gmail.com
 *        Company:  Dalian University Of Technology
 *
 * =====================================================================================
 */


#include	<stdio.h>
#include	<string.h>
#include	<unistd.h>
#include	<sys/types.h>
#include	<sys/socket.h>
#include	<netinet/in.h>
#include	<arpa/inet.h>
#define	PORT 1234				/*  */
#define	BACKLOG 5			/*  */
#define	MAXDATASIZE 1000			/*  */
void process_cli(int connfd,struct sockaddr_in client);
int main()
{
	int listenfd,connfd;
	pid_t pid;
	struct sockaddr_in server;
	struct sockaddr_in client;
	if((listenfd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{
		perror("Createing socket failed.");
		exit(1);
	}
	int opt=SO_REUSEADDR;
	setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
	bzero(&server,sizeof(server));
	server.sin_family=AF_INET;
	server.sin_port=htons(PORT);
	server.sin_addr.s_addr=htonl(INADDR_ANY);
	if(bind(listenfd,(struct sockaddr *)&server,sizeof(server))==-1)
	{
		perror("Bind() error.");
		exit(1);
	}
	if(listen(listenfd,BACKLOG)==-1)
	{
		perror("listen() error.\n");
		exit(1);
	}
	socklen_t	len=sizeof(client);
	while(1)
	{
		if((connfd=accept(listenfd,(struct sockaddr *)&client,&len))==-1)
		{
			perror("accept() error.\n");
			exit(1);
		}
		if((pid=fork())>0)
		{
			close(connfd);
			continue;
		}
		else if(pid==0)
		{
			close(listenfd);
			process_cli(connfd,client);
			exit(0);
		}
		else
		{
			printf("fork() error.\n");
			exit(0);
		}
	}
	close(listenfd);
	return 0;
}

void process_cli(int connfd,struct sockaddr_in client)
{
	int num;
	char recvbuf[MAXDATASIZE],sendbuf[MAXDATASIZE],cli_name[MAXDATASIZE];
	printf("You got a connection from %s.",inet_ntoa(client.sin_addr));
	num=recv(connfd,cli_name,MAXDATASIZE,0);
	if(num==0)
	{
		close(connfd);
		printf("client disconnected.\n");
		return ;
	}
	cli_name[num-1]='\0';
	printf("client's name is %s.\n",cli_name);
	while((num=recv(connfd,recvbuf,MAXDATASIZE,0))!=-1)
	{
		recvbuf[num]='\0';
		printf("received client ( %s )message: %s",cli_name,recvbuf);
		if(strcmp(recvbuf,"bye\n")==0)
			break;
		int i=0;
		for(i=0;i<num-1;i++)
		{
			if((recvbuf[i]>='a'&&recvbuf[i]<='z')||(recvbuf[i]>='A'&&recvbuf[i]<='Z'))
			{
				recvbuf[i]=recvbuf[i]+3;
				if((recvbuf[i]>'Z'&&recvbuf[i]<='Z'+3)||recvbuf[i]>'z')
				{
					recvbuf[i]=recvbuf[i]-26;
				}
			}
			sendbuf[i]=recvbuf[i];
		}
		sendbuf[num-1]='\0';
		send(connfd,sendbuf,strlen(sendbuf),0);
	}
	close(connfd);
}
运行命令：$:gcc MulProcServer.c -o MulProcServer.out

                  $:./MulProcServer.out

多进程客户端：

/*
 * =====================================================================================
 *
 *       Filename:  MulProcClient.c
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2012年02月21日 02时28分00秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  MaZheng (blog.youkuaiyun.com/mazheng1989), mazheng19891019@gmail.com
 *        Company:  Dalian University Of Technology
 *
 * =====================================================================================
 */


#include	<stdio.h>
#include	<string.h>
#include	<sys/socket.h>
#include	<sys/types.h>
#include	<unistd.h>
#include	<netinet/in.h>
#include	<arpa/inet.h>
#include	<netdb.h>
#define	PORT 1234			/*  */
#define	MAXDATASIZE 100			/*  */
void process(FILE *fp,int sockfd);
char *getMessage(char *sendline,int len,FILE* fp);
int main(int argc,char **argv)
{
	int sockfd;
	struct hostent *he;
	struct sockaddr_in server;
	if(argc!=2)
	{
		printf("Usage: %s <IP Address>\n",argv[0]);
		exit(1);
	}
	if((he=gethostbyname(argv[1]))==NULL)
	{
		printf("gethostbyname() error.\n");
		exit(1);
	}
	if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{
		printf("socket() error.\n");
		exit(1);
	}
	bzero(&server,sizeof(server));
	server.sin_family=AF_INET;
	server.sin_port=htons(PORT);
	server.sin_addr=*((struct in_addr *)he->h_addr);
	if(connect(sockfd,(struct sockaddr *)&server,sizeof(server))==-1)
	{
		printf("connect() error.\n");
		exit(1);
	}
	process(stdin,sockfd);
	close(sockfd);
	return 0;
}

void process(FILE *fp,int sockfd)
{
	char sendline[MAXDATASIZE],recvline[MAXDATASIZE];
	int num;
	printf("connected to server.\n");
	printf("Input client's name:");
	if(fgets(sendline,MAXDATASIZE,fp)==NULL)
	{
		printf("\n Exit.\n");
		return;
	}
	send(sockfd,sendline,strlen(sendline),0);
	while(getMessage(sendline,MAXDATASIZE,fp)!=NULL)
	{
		send(sockfd,sendline,strlen(sendline),0);
		if(strcmp(sendline,"bye")==0)
			break;
		if((num=recv(sockfd,recvline,MAXDATASIZE,0))==0)
		{
			printf("server terminated.\n");
			return;
		}
		recvline[num]='\0';
		printf("server Message : %s\n",recvline);
	}
	printf("\n Exit.\n");
}
char *getMessage(char *sendline,int len,FILE *fp)
{
	printf("Input string to server:");
	return (fgets(sendline,MAXDATASIZE,fp));
}
运行命令：$:gcc MulProcClient.c -o MulProcClient.out

                 $:./MulProcClient.out 127.0.0.1

多线程服务器端：

/*
 * =====================================================================================
 *
 *       Filename:  MulThreadServer.c
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  2012年02月21日 15时01分48秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  MaZheng (blog.youkuaiyun.com/mazheng1989), mazheng19891019@gmail.com
 *        Company:  Dalian University Of Technology
 *
 * =====================================================================================
 */


#include	<stdio.h>
#include	<string.h>
#include	<stdlib.h>
#include	<unistd.h>
#include	<sys/types.h>
#include	<sys/socket.h>
#include	<arpa/inet.h>
#include	<netinet/in.h>
#include	<pthread.h>
#define	PORT 1234			/*  */
#define	BACKLOG 5			/*  */
#define	MAXDATASIZE 1000			/*  */

void process_cli(int connfd,struct sockaddr_in client);
void *function(void *arg);
struct ARG{
	int connfd;
	struct sockaddr_in client;
};

int main()
{
	int listenfd,connfd;
	pthread_t tid;
	struct ARG *arg;
	struct sockaddr_in server;
	struct sockaddr_in client;
	socklen_t len;
	if((listenfd=socket(AF_INET,SOCK_STREAM,0))==-1)
	{
		perror("creating socket failed.");
		exit(1);
	}
	int opt=SO_REUSEADDR;
	setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
	bzero(&server,sizeof(server));
	server.sin_family=AF_INET;
	server.sin_port=htons(PORT);
	server.sin_addr.s_addr=htonl(INADDR_ANY);
	if(bind(listenfd,(struct sockaddr *)&server,sizeof(server))==-1)
	{
		perror("bind() error.\n");
		exit(1);
	}
	if(listen(listenfd,BACKLOG)==-1)
	{
		perror("listen() error.\n");
		exit(1);
	}
	len=sizeof(client);
	while(1)
	{
		if((connfd=accept(listenfd,(struct sockaddr *)&client,&len))==-1)
		{
			perror("accept() error.\n");
			exit(1);
		}
		arg=(struct ARG *)malloc(sizeof(struct ARG));
		arg->connfd=connfd;
		memcpy((void *)&arg->client,&client,sizeof(client));
		if(pthread_create(&tid,NULL,function,(void *)arg))
		{
			perror("pthread_create() error.\n");
			exit(1);
		}
	}
	close(listenfd);
	
	return 0;
}
void *function(void *arg)
{
	struct ARG *info;
	info=(struct ARG *)arg;
	process_cli(info->connfd,info->client);
	free(arg);
	pthread_exit(NULL);
}
void process_cli(int connfd,struct sockaddr_in client)
{
	int num;
	char recvbuf[MAXDATASIZE],sendbuf[MAXDATASIZE],cli_name[MAXDATASIZE];
	printf("Yoy got a connection from %s.\n",inet_ntoa(client.sin_addr));
	num=recv(connfd,cli_name,MAXDATASIZE,0);
	if(num==0)
	{
		close(connfd);
		printf("client disconnected.\n");
		return;
	}
	cli_name[num-1]='\0';
	printf("client's name is %s.\n",cli_name);
	while(num=recv(connfd,recvbuf,MAXDATASIZE,0))
	{
		recvbuf[num]='\0';
		printf("received client ( %s ) message:%s",cli_name,recvbuf);
		int i;
		for(i=0;i<num-1;i++)
		{
			if((recvbuf[i]>='a'&&recvbuf[i]<='z')||(recvbuf[i]>='A'&&recvbuf[i]>='Z'))
			{
				recvbuf[i]=recvbuf[i]+3;
				if((recvbuf[i]>'Z'&&recvbuf[i]<='Z'+3)||(recvbuf[i]>'z'))
				{
					recvbuf[i]=recvbuf[i]-26;
				}
			}
			sendbuf[i]=recvbuf[i]-26;
		}
		sendbuf[num-1]='\0';
		send(connfd,sendbuf,strlen(sendbuf),0);
	}
	close(connfd);
}
运行命令： $:gcc -pthread MulThreadServer.c -o MulTreadServer.out   (要加上-pthread选项才能编译多线程程序

                  $:./MulTreadServer.out 127.0.0.1

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