linux c++ socket入门之tcp server端

http://blog.csdn.net/jom_ch/article/details/7852491

tcp_server.h

[cpp] view plaincopy

1. #include <unistd.h>  
2. #include <iostream>  
3. #include <sys/socket.h>  
4. #include <arpa/inet.h>  
5.   
6. #define MAXSIZE 1024  
7.   
8. class tcp_server  
9. {  
10. private:  
11.         int socket_fd,accept_fd;  
12.         sockaddr_in myserver;  
13.         sockaddr_in remote_addr;  
14.   
15. public:  
16.         tcp_server(int listen_port);  
17.         int recv_msg();  
18. };  

tcp_server.cpp

[cpp] view plaincopy

1. #include "tcp_server.h"  
2.   
3. tcp_server::tcp_server(int listen_port) {  
4.   
5.         if(( socket_fd = socket(PF_INET,SOCK_STREAM,IPPROTO_TCP)) < 0 ){  
6.                 throw "socket() failed";  
7.         }  
8.   
9.         memset(&myserver,0,sizeof(myserver));  
10.         myserver.sin_family = AF_INET;  
11.         myserver.sin_addr.s_addr = htonl(INADDR_ANY);  
12.         myserver.sin_port = htons(listen_port);  
13.   
14.         if( bind(socket_fd,(sockaddr*) &myserver,sizeof(myserver)) < 0 ) {  
15.                 throw "bind() failed";  
16.         }  
17.   
18.         if( listen(socket_fd,10) < 0 ) {  
19.                 throw "listen() failed";  
20.         }  
21. }  
22.   
23. int tcp_server::recv_msg() {  
24.   
25.         while( 1 ) {  
26.   
27.                 socklen_t sin_size = sizeof(struct sockaddr_in);  
28.                 if(( accept_fd = accept(socket_fd,(struct sockaddr*) &remote_addr,&sin_size)) == -1 )  
29.                 {  
30.                         throw "Accept error!";  
31.                         continue;  
32.                 }  
33.                 printf("Received a connection from %s\n",(char*) inet_ntoa(remote_addr.sin_addr));  
34.   
35.                 if( !fork() ) {  
36.                         char buffer[MAXSIZE];  
37.                         memset(buffer,0,MAXSIZE);  
38.                         if( ( read(accept_fd,buffer,MAXSIZE)) < 0 ) {  
39.                                 throw("Read() error!");  
40.                         } else {  
41.                                 printf("Received message: %s\n",buffer);  
42.                                 break;  
43.                         }  
44.                         exit(0);  
45.                 }  
46.                 close(accept_fd);  
47.         }  
48.         return 0;  
49. }  

main.cpp

[cpp] view plaincopy

1. #include <iostream>  
2. #include <tcp_server.h>  
3.   
4. int main(int argc,char* argv[])  
5. {  
6.         tcp_server ts(atoi(argv[1]));  
7.         ts.recv_msg();  
8.         return 0;  
9. }  

 

编译

[cpp] view plaincopy

1. g++ -c tcp_server.cpp -o tcp_server.o  
2. g++ -g tcp_server.o main.cpp -I. -o main  

 运行

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1. ./main 9527  

客户端测试

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1. telnet server_ip 9527  

服务器端响应

[cpp] view plaincopy

1. client(IP:192.168.99.1) connected.