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1、服务器端程序CODE: Copy to clipboard-/* 服务器程序 (server.c) */#include <stdlib.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <unistd.h>#include <netdb.h>#include <sys/socket.h>#include <netinet/in.h>#include <sys/types.h>#in
2、clude <arpa/inet.h>int main(int argc, char *argv) int sockfd,new_fd; struct sockaddr_in server_addr; struct sockaddr_in client_addr;
3、 int sin_size,portnumber; char hello="Hello! Are You Fine?n" if(argc!=2) &
4、#160; fprintf(stderr,"Usage:%s portnumberan",argv0); exit(1); if(portnumber=atoi(argv1)<0)
5、0; fprintf(stderr,"Usage:%s portnumberan",argv0); exit(1);
6、60; /* 服务器端开始建立socket描述符 */ if(sockfd=socket(AF_INET,SOCK_STREAM,0)=-1)
7、0; fprintf(stderr,"Socket error:%sna",strerror(errno); exit(1); /* 服务器端填充 sockaddr结构 */
8、60; bzero(&server_addr,sizeof(struct sockaddr_in); server_addr.sin_family=AF_INET; server_addr.sin_addr.s_addr=htonl(INADDR_ANY); server_addr.sin_port=h
9、tons(portnumber);推荐精选 /* 捆绑sockfd描述符 */ if(bind(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr)=-1)
10、0; fprintf(stderr,"Bind error:%sna",strerror(errno); exit(1); /* 监听sockfd
11、描述符 */ if(listen(sockfd,5)=-1) fprintf(stderr,"Listen error:%sna",strerror(errno);
12、60; exit(1); while(1)
13、/* 服务器阻塞,直到客户程序建立连接 */ sin_size=sizeof(struct sockaddr_in); if(new_fd=accept(sockfd,(struct sockaddr *)(&clien
14、t_addr),&sin_size)=-1) fprintf(stderr,"Accept error:%sna"
15、,strerror(errno); exit(1);
16、60; fprintf(stderr,"Server get connection from %sn", inet_ntoa(client_addr.sin_addr); &
17、#160; if(write(new_fd,hello,strlen(hello)=-1) fprintf(stder
18、r,"Write Error:%sn",strerror(errno); exit(1);
19、0; /* 这个通讯已经结束 */ close(new_fd);
20、0; /* 循环下一个 */ close(sockfd); exit(0);客户端程序推荐精选CODE: Copy to clipboard-/* 客户端程序 client.c */* 客户端程序 client.c */#include
21、 <stdlib.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <unistd.h>#include <netdb.h>#include <sys/socket.h>#include <netinet/in.h>#include <sys/types.h>#include <arpa/inet.h>int main(int argc, char *argv)
22、; int sockfd; char buffer1024; struct sockaddr_in server_addr; struct hostent *host; int portnumber,nbytes;&
23、#160; if(argc!=3) fprintf(stderr,"Usage:%s hostname portnumberan",argv0);
24、 exit(1); if(host=gethostbyname(argv1)=NULL)
25、160; fprintf(stderr,"Gethostname errorn"); exit(1); if(portnumber=atoi(argv2)<0)
26、160; fprintf(stderr,"Usage:%s hostname portnumberan",argv0); exit(1);
27、0; /* 客户程序开始建立 sockfd描述符 */ if(sockfd=socket(AF_INET,SOCK_STREAM,0)=-1)
28、; fprintf(stderr,"Socket Error:%san",strerror(errno); exit(1); 推荐精选 /* 客户程序填充服务端的资料
29、60; */ bzero(&server_addr,sizeof(server_addr); server_addr.sin_family=AF_INET; server_addr.sin_port=htons(portnumber); server_ad
30、dr.sin_addr=*(struct in_addr *)host->h_addr); /* 客户程序发起连接请求 */ if(connect(sockfd,(struct sockaddr *)(&server_addr),sizeof(struct sockaddr)=-1)
31、 fprintf(stderr,"Connect Error:%san",strerror(errno); exit(1);
32、; /* 连接成功了 */ if(nbytes=read(sockfd,buffer,1024)=-1)
33、 fprintf(stderr,"Read Error:%sn",strerror(errno); exit(1); buffernb
34、ytes='0' printf("I have received:%sn",buffer); /* 结束通讯 */ close(sockfd); exit(0);MakeFile这
35、里我们使用GNU 的make实用程序来编译. 关于make的详细说明见 Make 使用介绍CODE: Copy to clipboard # Makefile #all:server clientserver:server.c gcc $ -o $client:client.c gcc $ -o $运行make后会产生两个程序serv
36、er(服务器端)和client(客户端) 先运行./server portnumber& (portnumber随便取一个大于1204且不在/etc/services中出现的号码 就用8888好了), 然后运行 ./client localhost 8888 看看有什么结果. (你也可以用telnet和netstat试一试.) (注:可编辑下载,若有不当之处,请指正,谢谢!) 推荐精选