代码示例_网络编程

代码示例_网络编程_TCP

TCP

1.　头文件

 1 #pragma once
 2 
 3 #include <stdio.h>
 4 #include <stdlib.h>
 5 #include <sys/types.h>
 6 #include <sys/socket.h>
 7 #include <strings.h>
 8 #include <string.h>
 9 #include <linux/in.h>
10 
11 #define IP "192.168.2.150"
12 #define PORT 9999
13 #define SIZE 128

2.　client_tcp

 1 #include "net.h"
 2 
 3 int main(void)
 4 {
 5     //1.创建套接字
 6     int fd = socket(AF_INET,SOCK_STREAM,0);
 7     if(fd<0){
 8         perror("socket failed");
 9         exit(1);
10     }
11 
12 
13     //2.初始服务器地址
14     struct sockaddr_in cli;
15     cli.sin_family = AF_INET;
16     cli.sin_port = htons(PORT);
17     cli.sin_addr.s_addr=inet_addr(IP);
18 
19 
20     //3.发起连接请求
21     if( connect(fd,(struct sockaddr*)&cli,sizeof(cli))<0 ){
22         perror("connect failed");
23         exit(1);
24     }
25 
26 
27     //4.写
28     char buf[SIZE];
29     while(1){
30     bzero(buf,SIZE);
31     printf("please input:	");
32     fgets(buf,SIZE,stdin);
33     write(fd,buf,strlen(buf));
34         if(strncmp(buf,"quit",4)==0)
35         break;
36     }
37 
38     
39     //5.关闭
40     close(fd);
41 
42     return 0 ;
43 }

3.server_tcp

 1 #include "net.h"
 2 
 3 int main(void)
 4 {
 5     //1.创建套接字
 6     int fd = socket(AF_INET,SOCK_STREAM,0);
 7     if(fd<0){
 8         perror("socket failed");
 9         exit(1);
10     }
11 
12 
13     //2.初始本地地址
14     struct sockaddr_in ser;
15     ser.sin_family = AF_INET;
16     ser.sin_port = htons(PORT);
17     ser.sin_addr.s_addr=inet_addr(IP);
18 
19 
20     //3.绑定
21     if(  bind(fd,(struct sockaddr*)&ser,sizeof(ser))<0  ){
22         perror("bind failed");
23         exit(1);
24     }
25 
26 
27     //4.监听
28     if(  listen(fd,5)<0  ){
29         perror("listen failed");
30         exit(1);
31     }
32 
33 
34     //5.接收
35     int newfd;
36     if(   (newfd=accept(fd,NULL,NULL))<0  ){
37         perror("accept failed");
38         exit(1);
39     }
40 
41 
42     //6.读
43     char buf[SIZE];
44     while(1){
45     bzero(buf,SIZE);
46     int ret = read(newfd,buf,SIZE);
47     if(ret<0){
48         perror("read failed");
49         exit(1);
50     }
51     else if(ret==0)
52         break;
53     else
54     printf("server : %s",buf);
55         if(strncmp(buf,"quit",4)==0)
56             break;
57     }
58 
59     //7.关闭
60     close(fd);
61     close(newfd);
62 
63 
64     return 0 ;
65 }

测试：

success ！

Stay hungry, stay foolish 待续。。。