一、编写Linux下socket协议TCP的ClientServer程序
- //客户端,client:
- #include<stdio.h>
- #include<unistd.h>
- #include<stdlib.h>
- #include<sys/socket.h>
- #include<sys/stat.h>
- #include<arpa/inet.h>
- #define MAXBUF 256
- int main()
- {
- int ssock;
- int clen;
- struct sockaddr_in server_addr;
- char buf[MAXBUF];
- if((ssock=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))<0){
- perror("socket error:");
- exit(1);
- }
- clen = sizeof(server_addr);
- memset(&server_addr,0,sizeof(server_addr));
- server_addr.sin_family =AF_INET;
- server_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
- server_addr.sin_port =htons(7758);
- if(connect(ssock,(struct sockaddr *)&server_addr,clen)<0){
- perror("connect error:");
- exit(1);
- }
- memset(buf,0,MAXBUF);
- if(read(ssock,buf,MAXBUF)<=0)
- {
- perror("read error:");
- exit(1);
- }
- close(ssock);
- printf("\nread: %s\n",buf);
- return 0;
- }
- //服务端,server:
- #include<stdio.h>
- #include<unistd.h>
- #include<stdlib.h>
- #include<string.h>
- #include<sys/socket.h>
- #include<sys/stat.h>
- #include<arpa/inet.h>
- #define MAXBUF 256
- int main()
- {
- int clen;
- int ssock,csock;
- struct sockaddr_in client_addr,server_addr;
- char buf[MAXBUF];
- if((ssock=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))<0){
- perror("socket error:");
- exit(1);
- }
- clen = sizeof(client_addr);
- memset(&server_addr,0,sizeof(server_addr));
- server_addr.sin_family =AF_INET;
- server_addr.sin_addr.s_addr=htonl(INADDR_ANY);<p> server_addr.sin_port=htons(7758);
- if(bind(ssock,(struct sockaddr *)&server_addr,sizeof(server_addr))<0){
- perror("bind error");
- exit(1);
- }
- if(listen(ssock,8)<0){
- perror("listen error:");
- exit(1);
- }
- while(1){
- csock=accept(ssock,(struct sockaddr *)&client_addr,&clen);
- if(write(csock,buf, MAXBUF)<=0)
- perror("write error:");
- close(csock);
- }
- return 0;
- }
- </p>
- //客户端,client:
- #include<stdio.h>
- #include<unistd.h>
- #include<stdlib.h>
- #include<string.h>
- #include<sys/socket.h>
- #include<sys/stat.h>
- #include<arpa/inet.h>
- #define MAXBUF 256
- int main()
- {
- int ssock;
- int clen;
- struct sockaddr_in client_addr,server_addr;
- char buf[MAXBUF];
- strcpy(buf,"I miss you already!\n");
- if((ssock = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP))<0){
- perror("socket error:\n");
- exit(1);
- }
- memset(&server_addr,0,sizeof(server_addr));
- server_addr.sin_family =AF_INET;
- server_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
- server_addr.sin_port=htons(7758);
- sendto(ssock,(void *)buf,MAXBUF,0,(struct sockaddr*)&server_addr,sizeof(server_addr));
- printf("Send message:%s\n",buf);
- clen=sizeof(client_addr);
- recvfrom(ssock,(void *)buf,MAXBUF,0,(struct sockaddr*)&server_addr,&clen);
- printf("Receive message:%s\n",buf);
- close(ssock);
- return 0;
- }
- //服务端,server:
- #include<stdio.h>
- #include<unistd.h>
- #include<stdlib.h>
- #include<string.h>
- #include<sys/socket.h>
- #include<sys/stat.h>
- #include<arpa/inet.h>
- #define MAXBUF 256
- int main()
- {
- int ssock;
- int clen;
- struct sockaddr_in client_addr,server_addr;
- char buf[MAXBUF];
- if((ssock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP))<0){
- perror("socket error:");
- exit(1);
- }
- memset(&server_addr,0,sizeof(server_addr));
- server_addr.sin_family=AF_INET;
- server_addr.sin_addr.s_addr=htonl(INADDR_ANY);
- server_addr.sin_port=htons(7758);
- if(bind(ssock,(struct sockaddr *)&server_addr,sizeof(server_addr))<0){
- perror("bind error:");
- exit(1);
- }
- clen=sizeof(client_addr);
- recvfrom(ssock,(void *)buf,MAXBUF,0,(struct sockaddr*)&client_addr,&clen);
- strcpy(buf,"I miss you");
- sendto(ssock,(void *)buf,MAXBUF,0,(struct sockaddr*)&client_addr ,sizeof(client_addr));
- close(ssock);
- return 0;
- }
from: http://blog.youkuaiyun.com/silentpebble/article/details/7077161