linux下简易端口扫描器

 #include<iostream>
 #include<string.h>
 #include<sys/types.h>
 #include<sys/socket.h>
 #include<arpa/inet.h>
 #include<unistd.h>
 using namespace std;

 int main(int argc,char *argv[])
 {
     int s;
     struct sockaddr_in server_addr;

     s=socket(AF_INET,SOCK_STREAM,);
     if(s<){
         cout<<"Init socket error"<<endl;
         return -;
     }

     bzero(&server_addr,sizeof(server_addr));
     server_addr.sin_family=AF_INET;
     inet_pton(AF_INET, argv[], &server_addr.sin_addr);

     for(int port=;port<=;port++)
     {
         server_addr.sin_port=htons(port);
         int err=connect(s,(struct sockaddr*)&server_addr,sizeof(server_addr));
         if(err!=-){
             cout<<port<<":"<<"true"<<endl;
         }
     }
     return ;
 }