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Odd Errors When Compiling Winsock Code.

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Odd Errors When Compiling Winsock Code.

 
1
  #1
Oct 26th, 2008
Hello, first of all i'm glad to be a member here. Nice to be with you!

I wrote a simple dum port scanner. For practicing purposes. It worked fine under linux, i ported to windows, i linked it to winsock libraries. I keep getting errors, such as

C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|29|error C3861: 'getaddrinfo': identifier not found|

Anyway here is my code if you want to see it:

C++ Syntax (Toggle Plain Text) 
  1. #include<iostream>
  2. #include<string>
  3. #include<sstream>
  4. #include"WinSock2.h"
  5. using namespace std;
  6.  
  7. struct addrinfo hints;      	//fill your host info - hints is input
  8. struct addrinfo *results;	//gets your host info - results is output
  9. char *remoteIP = new char[40];  //holds inserted remote IP
  10. string tempPort;                //holds ports temporarly
  11. int startingPort;               //stores the starting range of port number
  12. int status;                     //receives the status of your pc address
  13. int currentPort;           //holds current port
  14.  
  15.  
  16. //program description
  17. void progDesc()
  18. {
  19.      cout<<"This is a simple port scanner, scan range of\n";
  20.      cout<<"ports on your local machine...\n"<<endl;
  21.  
  22. }
  23.  
  24.  
  25. //getaddrinfe locates your machine, more specific
  26. //details of your host address is returned to results.
  27. void getAddrIn()
  28. {
  29. 	status = getaddrinfo(remoteIP, NULL , &hints, &results);
  30.  
  31. 	if(status != 0)
  32. 	{
  33. 		fprintf(stderr, "getaddrinfo error: %s\n", gai_strerror(status));
  34. 		exit(1);
  35. 	}
  36. }
  37.  
  38.  
  39. //Run the program
  40. int main()
  41. {
  42. 	int endingPort;                 //stores the ending rage of port number
  43.  
  44.     WORD wVersionRequested;
  45.     WSADATA wsaData;
  46.     int err;
  47.  
  48. 	/* Use the MAKEWORD(lowbyte, highbyte) macro declared in Windef.h */
  49.     wVersionRequested = MAKEWORD(2, 2);
  50.  
  51.     err = WSAStartup(wVersionRequested, &wsaData);
  52.     if (err != 0) {
  53.         /* Tell the user that we could not find a usable */
  54.         /* Winsock DLL.                                  */
  55.         printf("WSAStartup failed with error: %d\n", err);
  56.         return 1;
  57.     }
  58.  
  59. 	system("clear");
  60.  
  61. 	//tell user what program does
  62. 	progDesc();
  63.  
  64. 	//set size of hints to zero
  65. 	memset(&hints, 0, sizeof hints);
  66.  
  67. 	//fill some of your host address info
  68. 	hints.ai_family = AF_UNSPEC;
  69. 	hints.ai_socktype = SOCK_STREAM;
  70.  
  71. 	//ask for remote IP
  72. 	cout<<"Please enter your target IP: ";
  73. 	cin>>remoteIP;
  74.  
  75. 	getAddrIn();
  76.  
  77. 	//ask port range from user
  78. 	cout<<"Enter Starting Port: ";
  79. 	cin>>startingPort;
  80.  
  81. 	cout<<"Enter Ending Port: ";
  82. 	cin>>endingPort;
  83.  
  84. 	cout<<endl;
  85.  
  86. 	cout<<"Start Checking: "<<endl;
  87.  
  88.  
  89. 	//check the status
  90. 	while(startingPort <= endingPort)
  91. 	{
  92. 		//call getaddrinfo()
  93. 		getAddrIn();
  94.  
  95. 		//create a socket.
  96. 		int socketfd;
  97. 		socketfd = socket(results->ai_family, results->ai_socktype, results->ai_protocol);
  98.  
  99. 		if(socketfd == -1 )
  100. 		{
  101. 			cout<<"Error: failed to create a socket.\n";
  102. 			return 2;
  103. 		}
  104.  
  105. 		struct sockaddr_in *specifyPort = (struct sockaddr_in *)results->ai_addr;
  106.  
  107. 		specifyPort->sin_port = htons(startingPort);
  108.  
  109. 		int connectStatus;
  110. 		connectStatus = connect(socketfd, results->ai_addr, results->ai_addrlen);
  111.  
  112. 		if(connectStatus == -1 )
  113. 		{
  114. 			if(errno == ECONNREFUSED)
  115. 				cout<<"Port "<<startingPort<<" is Closed or Blocked.\n";
  116. 			//Alternatively, you can do:
  117. 			//cout << "connect failed; reason = " << strerror(errno) <<endl;
  118. 		}else{
  119. 			cout<<"Port "<<startingPort<<" is OPEN.\n";
  120. 		}
  121.  
  122.  
  123. 		closesocket(socketfd);
  124.  
  125. 		//move to the next port in the specified range
  126. 		startingPort++;
  127.  
  128. 	}
  129.  
  130. 	//deallocate memory
  131. 	delete[] remoteIP;
  132.  
  133. 	//free linkedlist of struct addrinfo *results
  134. 	freeaddrinfo(results);
  135.     WSACleanup();
  136. 	return 0;
  137. }

Errors:

C++ Syntax (Toggle Plain Text) 
  1. C:\Program Files\Microsoft Visual Studio 9.0\VC\include\xlocale|342|warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc|
  2. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|7|error C2079: 'hints' uses undefined struct 'addrinfo'|
  3. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|29|error C3861: 'getaddrinfo': identifier not found|
  4. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|33|error C3861: 'gai_strerror': identifier not found|
  5. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|53|error C2228: left of '.ai_family' must have class/struct/union|
  6. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|54|error C2228: left of '.ai_socktype' must have class/struct/union|
  7. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2027: use of undefined type 'addrinfo'|
  8. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2227: left of '->ai_family' must point to class/struct/union/generic type|
  9. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2027: use of undefined type 'addrinfo'|
  10. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2227: left of '->ai_socktype' must point to class/struct/union/generic type|
  11. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2027: use of undefined type 'addrinfo'|
  12. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|82|error C2227: left of '->ai_protocol' must point to class/struct/union/generic type|
  13. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|90|error C2027: use of undefined type 'addrinfo'|
  14. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|90|error C2227: left of '->ai_addr' must point to class/struct/union/generic type|
  15. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|95|error C2027: use of undefined type 'addrinfo'|
  16. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|95|error C2227: left of '->ai_addr' must point to class/struct/union/generic type|
  17. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|95|error C2027: use of undefined type 'addrinfo'|
  18. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|95|error C2227: left of '->ai_addrlen' must point to class/struct/union/generic type|
  19. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|99|error C2065: 'ECONNREFUSED' : undeclared identifier|
  20. C:\Documents and Settings\Fahmi\Desktop\test\main.cpp|119|error C3861: 'freeaddrinfo': identifier not found|
  21. ||=== Build finished: 19 errors, 1 warnings ===|


PLZ HELP.... I ALREADY DID ALL I CAN. I'm about to give up....
Last edited by f.ben.isaac; Oct 26th, 2008 at 1:47 am.
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Re: Odd Errors When Compiling Winsock Code.

 
0
  #2
Oct 26th, 2008
you are missing a header file -- see example program here
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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Re: Odd Errors When Compiling Winsock Code.

 
0
  #3
Oct 26th, 2008
I managed to make the code compile free of errors and warnings, here are the changes I made. 
#include<iostream>
#include<string>
#include<sstream>
#include<winsock2.h>
#include<ws2tcpip.h>

#pragma comment(lib, "Ws2_32.lib")

using namespace std;

struct addrinfo hints;      	//fill your host info - hints is input
struct addrinfo *results;	//gets your host info - results is output
char *remoteIP = new char[40];  //holds inserted remote IP
string tempPort;                //holds ports temporarly
int startingPort;               //stores the starting range of port number
int status;                     //receives the status of your pc address
int currentPort;           //holds current port


//program description
void progDesc()
{
     cout<<"This is a simple port scanner, scan range of\n";
     cout<<"ports on your local machine...\n"<<endl;

}


//getaddrinfe locates your machine, more specific
//details of your host address is returned to results.
void getAddrIn()
{
	status = getaddrinfo(remoteIP, NULL , &hints, &results);

	if(status != 0)
	{
		fprintf(stderr, "getaddrinfo error: %s\n", gai_strerror(status));
		exit(1);
	}
}


//Run the program
int main()
{
	int endingPort;                 //stores the ending rage of port number

    WORD wVersionRequested;
    WSADATA wsaData;
    int err;

	/* Use the MAKEWORD(lowbyte, highbyte) macro declared in Windef.h */
    wVersionRequested = MAKEWORD(2, 2);

    err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        /* Tell the user that we could not find a usable */
        /* Winsock DLL.                                  */
        printf("WSAStartup failed with error: %d\n", err);
        return 1;
    }

	system("cls");

	//tell user what program does
	progDesc();

	//set size of hints to zero
	memset(&hints, 0, sizeof hints);

	//fill some of your host address info
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;

	//ask for remote IP
	cout<<"Please enter your target IP: ";
	cin>>remoteIP;

	getAddrIn();

	//ask port range from user
	cout<<"Enter Starting Port: ";
	cin>>startingPort;

	cout<<"Enter Ending Port: ";
	cin>>endingPort;

	cout<<endl;

	cout<<"Start Checking: "<<endl;


	//check the status
	while(startingPort <= endingPort)
	{
		//call getaddrinfo()
		getAddrIn();

		//create a socket.
		SOCKET socketfd;
		socketfd = (int) socket(results->ai_family, results->ai_socktype, results->ai_protocol);

		if(socketfd == -1 )
		{
			cout<<"Error: failed to create a socket.\n";
			return 2;
		}

		struct sockaddr_in *specifyPort = (struct sockaddr_in *)results->ai_addr;

		specifyPort->sin_port = htons(startingPort);

		int connectStatus;
		connectStatus = connect(socketfd, results->ai_addr, (int)results->ai_addrlen);

		if(connectStatus == -1 )
		{
			if(errno == WSAECONNREFUSED)
				cout<<"Port "<<startingPort<<" is Closed or Blocked.\n";
			//Alternatively, you can do:
			//cout << "connect failed; reason = " << strerror(errno) <<endl;
		}else{
			cout<<"Port "<<startingPort<<" is OPEN.\n";
		}


		closesocket(socketfd);

		//move to the next port in the specified range
		startingPort++;

	}

	//deallocate memory
	delete[] remoteIP;

	//free linkedlist of struct addrinfo *results
	freeaddrinfo(results);
    WSACleanup();
	return 0;
}
Hope this helps :]
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Re: Odd Errors When Compiling Winsock Code.

 
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  #4
Oct 26th, 2008
Hey, great!!!!! worked
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Re: Odd Errors When Compiling Winsock Code.

 
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  #5
Oct 26th, 2008
I did not do this #pragma comment(lib, "Ws2_32.lib")

I went to the linker & put the path that leads to Ws2_32.lib....

THANKS
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