c语言下的端口扫描代码.txt

2 c语言下的端口扫描代码 很好用 黑客基地的

#include <stdafx.h>
#include <stdio.h> 
#include <string.h> 
#include <winsock.h> 
#pragma comment (lib,"ws2_32.lib") 
int main(int argc, char *argv[]) { 
 
int mysocket; 
 
int pcount = 0; 
 
struct sockaddr_in my_addr; 
 
WSADATA wsaData; 
 
WORD wVersionRequested=MAKEWORD(1,1); 
 
 
if(argc < 3) { 
 
printf("usage: %s <host> <maxport>\n", argv[0]); 
 
exit(1); 
 
} 
 
 
if (WSAStartup(wVersionRequested , &wsaData)){ 
 
printf("Winsock Initialization failed.\n"); 
 
exit(1); 
 
} 
 
 
for(int i=1; i < atoi(argv[2]); i++){ 
 
if((mysocket = socket(AF_INET, SOCK_STREAM,0)) == INVALID_SOCKET){ 
 
printf("Socket Error"); 
 
exit(1); 
 
} 
 
 
my_addr.sin_family = AF_INET; 
 
my_addr.sin_port = htons(i); 
 
my_addr.sin_addr.s_addr = inet_addr(argv[1]); 
 
 
if(connect(mysocket, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == SOCKET_ERROR) 
 
closesocket(mysocket); 
 
else{ 
 
pcount++; 
 
printf("Port %d - open\n", i); 
 
}} 
 
 
printf("%d ports open on host - %s\n", pcount, argv[1]); 
 
closesocket(mysocket); 
 
WSACleanup(); 
 
return 0; 
}