1. #define WIN32_LEAN_AND_MEAN
    3. #include <windows.h>
    4. #include <winsock2.h>
    5. #include <ws2tcpip.h>
    6. #include <stdlib.h>
    7. #include <stdio.h>
    10. // Need to link with Ws2_32.lib, Mswsock.lib, and Advapi32.lib
    11. #pragma comment (lib, "Ws2_32.lib")
    12. #pragma comment (lib, "Mswsock.lib")
    13. #pragma comment (lib, "AdvApi32.lib")
    16. #define DEFAULT_BUFLEN 512
    17. #define DEFAULT_PORT "27015"
    18. int Scan(char *ip,int port);
    20. int __cdecl main(int argc, char** argv)
    21. {
    22.     WSADATA wsaData;
    26.     int iResult;
    29.     // Validate the parameters
    30.     if (argc != 2) {
    31.         printf("usage: %s server-name\n", argv[0]);
    32.         return 1;
    33.     }
    35.     // Initialize Winsock
    36.     iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
    37.     if (iResult != 0) {
    38.         printf("WSAStartup failed with error: %d\n", iResult);
    39.         return 1;
    40.     }
    42.     for (int i = 0; i < 65535; i++)
    43.     {
    44.         Scan(argv[1], i);
    47.     }
    53. }
    55. int Scan(char** ip,int port) {
    56.     struct addrinfo* result = NULL,
    57.         * ptr = NULL, hints;
    58.     SOCKET ConnectSocket = INVALID_SOCKET;
    59.     ZeroMemory(&hints, sizeof(hints));
    60.     hints.ai_family = AF_UNSPEC;
    61.     hints.ai_socktype = SOCK_STREAM;
    62.     hints.ai_protocol = IPPROTO_TCP;
    63.     int iResult;
    65.     // Resolve the server address and port
    66.     iResult = getaddrinfo(ip[1], (PCSTR)port, &hints, &result);
    67.     if (iResult != 0) {
    68.         printf("getaddrinfo failed with error: %d\n", iResult);
    69.         WSACleanup();
    70.         return 1;
    71.     }
    73.     // Attempt to connect to an address until one succeeds
    74.     for (ptr = result; ptr != NULL; ptr = ptr->ai_next) {
    76.         // Create a SOCKET for connecting to server
    77.         ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype,
    78.             ptr->ai_protocol);
    79.         if (ConnectSocket == INVALID_SOCKET) {
    80.             printf("socket failed with error: %ld\n", WSAGetLastError());
    82.             return 1;
    83.         }
    85.         // Connect to server.
    86.         iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
    87.         if (iResult == SOCKET_ERROR) {
    88.             closesocket(ConnectSocket);
    89.             ConnectSocket = INVALID_SOCKET;
    90.             continue;
    91.         }
    92.         break;
    93.     }
    95.     freeaddrinfo(result);
    97.     if (ConnectSocket == INVALID_SOCKET) {
    98.         printf("Unable to connect to server!\n");
    99.         return 1;
    100.     }
    104.     printf("addr : %s|%d open",ip,port);
    106.     // shutdown the connection since no more data will be sent
    107.     iResult = shutdown(ConnectSocket, SD_SEND);
    108.     if (iResult == SOCKET_ERROR) {
    109.         printf("shutdown failed with error: %d\n", WSAGetLastError());
    110.         closesocket(ConnectSocket);
    111.         return 1;
    112.     }
    114.     // Receive until the peer closes the connection
    117.     // cleanup
    118.     closesocket(ConnectSocket);
    121.     return 0;
    125. };