Solved

Network Programming

Posted on 1998-12-08
11
209 Views
Last Modified: 2010-04-15
I m writing a TCP/IP network program using C on MS Visual C++ 5.0 on a WinNT platform . I get LNK2001 error whenever i link my files ... any ideas ?
0
Comment
Question by:SkyWolf
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 5
11 Comments
 
LVL 6

Accepted Solution

by:
stsanz earned 100 total points
ID: 1254945
If you use TCP/IP functions, you have to declare winsock library in your Visual C++ project.
Go to menu Project/Settings..., click on "link" tab and add wsock32.lib and ws2_32.lib in "Object/Library modules" edit box.

Your program should now link correctly.
Otherwise, tell us what is the full LNK2001 error message.


0
 
LVL 1

Expert Comment

by:billyh
ID: 1254946
I usually get that error when I have defined a method in one of my classes and then forgetting to implement it in my defination file. Other causes of this error are using the wrong case when implementing a method, remember C is case-sensitive.
0
 

Author Comment

by:SkyWolf
ID: 1254947
Now that u added both lib to the Object/Library i got these errors ....

LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/alarmman.exe : fatal error LNK1120: 1 unresolved externals

0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:SkyWolf
ID: 1254948
sorry ...typo...i mean now that i added the lib into Object/Library ...
0
 
LVL 6

Expert Comment

by:stsanz
ID: 1254949
Is your program a console program (with a main() function) or a windows program (with a WinMain() function)

Do you have a main or WinMain function ?
Does the same link error message appear if you compile to Release configuration, instead of Debug ?


0
 

Author Comment

by:SkyWolf
ID: 1254950
I am using a main() ... I still get the error if the output file is to Release .....
0
 
LVL 6

Expert Comment

by:stsanz
ID: 1254951
If you want to create a windows program you have to replace your main() function by the WinMain() function :

int APIENTRY WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
  {
  // Do the startup stuff

  return 0 ;
  }

Instead, if you want to create an old-fashioned "DOS" program and use main() function, you have to select "Win32 Console Application" when you create a new project in Visual C++

0
 

Author Comment

by:SkyWolf
ID: 1254952
erm...i hav a qs though , is it that , if i use socket tp pass data, i am ACTUALLY not implementing TCP/IP ?
0
 
LVL 6

Expert Comment

by:stsanz
ID: 1254953
Sorry I can't understand your question. Do you mean you want to know if your program implements a TCP/IP protocol when it uses socket layers functions ? Can you please ask your question again ?



0
 

Author Comment

by:SkyWolf
ID: 1254954
"whack" me if I am wrong here *smile* ..TCP/IP is a connectionless protocol which  doesnt use the bind() functional call ? so the standard procedures of creating a socket(),recv(),send() is as usual ?
0
 
LVL 6

Expert Comment

by:stsanz
ID: 1254955
I don't know how to use socket functions. You should create a new question on "C language" home page about it.

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
Examines three attack vectors, specifically, the different types of malware used in malicious attacks, web application attacks, and finally, network based attacks.  Concludes by examining the means of securing and protecting critical systems and inf…
The goal of this video is to provide viewers with basic examples to understand and use pointers in the C programming language.
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use nested-loops in the C programming language.

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question