Linux C语言写的超级简单端口扫描器

朱雀 2022-08-17 14:14 142阅读 0赞

转载自：http://blog.csdn.net/kongjiajie/article/details/4799986

[Linux C语言写的超级简单端口扫描器][Linux C]

这个本来以前也写过的，今天无聊复习下 再写一遍。简单的一塌糊涂，写的不咋地大家见谅哦！有空再加强 嘿嘿！

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1.  \#include <stdio.h>
2.  \#include <stdlib.h>
3.  \#include <sys/socket.h>
4.  \#include <time.h>
5.  \#include <sys/types.h>
6.  \#include <netinet/in.h>
7.  \#include <netdb.h>
8.  **void** msg() 
9.  \{ 
10.  printf("EP:scan ip startport endport/nEP:scan ip 127.0.0.1 20 2009/n"); 
11. \} 
12. **int** main(**int** argc,**char**\*\* argv) 
13. \{ 
14. **char** \*ip; 
15. **int** startport,endport,sockfd,i; 
16. **struct** sockaddr\_in to; 
17. **float** costtime; 
18. **clock\_t** start,end; 
19. **if**(4!=argc) 
20.  \{ 
21.  msg(); 
22. **return** 0; 
23.  \} 
24.  ip=argv\[1\]; 
25.  startport=atoi(argv\[2\]); 
26.  endport=atoi(argv\[3\]); 
27. **if**(startport<1 || endport>65535 || endport<startport) 
28.  \{ 
29.  printf("端口范围出错/n"); 
30. **return** 0; 
31.  \} 
32. **else**
33.  printf("IP:%s %d-%d/n",ip,startport,endport); 
34.  to.sin\_family=AF\_INET; 
35.  to.sin\_addr.s\_addr=inet\_addr(ip); 
36.  start=clock(); 
37. **for**(i=startport;i<=endport;i++) 
38.  \{ 
39.  sockfd=socket(AF\_INET,SOCK\_STREAM,0); 
40.  to.sin\_port=htons(i); 
41. **if**(connect(sockfd,(**struct** sockaddr \*)&to,**sizeof**(**struct** sockaddr))==0) 
42.  \{ 
43.  printf("%s %d/n",ip,i); 
44.  close(to); 
45.  \} 
46.  \} 
47.  end=clock(); 
48.  costtime=(**float**)(end-start)/CLOCKS\_PER\_SEC; 
49.  printf("用时:%f秒/n",costtime); 
50. **return** 0; 
51. \}

[Linux C]: http://blog.csdn.net/kongjiajie/article/details/4799986
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