多进程和多线程服务器端

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.csdn.net/mazheng1989), [e-mail] *        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>#definePORT 1234/*  */#defineBACKLOG 5/*  */#defineMAXDATASIZE 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_tlen=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.csdn.net/mazheng1989), [e-mail] *        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>#definePORT 1234/*  */#defineMAXDATASIZE 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.csdn.net/mazheng1989), [e-mail] *        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>#definePORT 1234/*  */#defineBACKLOG 5/*  */#defineMAXDATASIZE 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