Sounds to me like you are not linking the necessary libraries to your
project, i know how hard is this at the begining but dont dispair download the winpcap developers pack and link the necessary files as stated on the winpcap tutorial : http://winpcap.polito.it/docs/man/html/group__wpcap__tut.html "WinPcap tutorial: a step by step guide to program WinPcap" be sure to follow every step of it and you should have your application runing in no time. hope this help Daniel Quintero Terry Braun wrote: Mario, Someone else will probably chime in with more help (and hopefully correct me if I make a mistake!) but 1. there are two interfaces, packet.dll that runs on top of the driver (npf.sys) winpcap that runs on top of packet.dll 2. The interface of choice is winpcap because it is the "supported" (and therefore mostly unchanging) interface, whereas packet.dll may change Unless you have some special needs you should at least start with winpcap. Sounds like you did. 3. Unless you have special requirements you should use the developer pack with the header files and precomiled libraries. You can find the ddk somewhere online if you need it ( I don't remember where sorry) but it is really not required, at least at this stage 4. Make sure that you have linked in wpcap.lib- I think you can either include it in a VC++ project or do "properties/linker/inputs". - I think this is your current problem. 5. In order to run you will need both packet.dll and winpcap.dllI hope this help Terry Mario Hollibaugh wrote:I am trying to develop a compact, customized-to-my-purposes packet sniffer using VC++ v6.0. It was recommended to me that instead of writing a program using hardware interfacing and working directly with interrupts, to take a look at and use the WinPCap library. Normally I can hack my way through things with computers, but right now I am so frustrated I could cry. <>When I look at the documentation (and believe me, I have spent nearly 15 hours reading through the docs trying to help myself out) I notice 2 things: 1) documentation entitled “WinPcap tutorial: a step by step guide to program WinPcap”, and 2) WinPcap internals” under which are “NPf driver internals manual” and “Packet Driver API developer’s manual”. Through no amount of reading, or posting in my usual newsgroups, have I been able to determine which section pertains to me. Do I want to know how to “program WinPcap”, or do I want to use the “Packet Driver API’s”? <> Furthermore, I can’t “build the NPF driver” like it talks about in one of the read-me’s that came with my download for WinPcap source v 3.0, because I don’t have a DDK (driver development kit). Do I need to be able to compile that in order to use the WinPcap library? Or do I only need to take the precompiled library that comes with the download, put it in the included libraries, and also make sure I get all the .h and .c files that came with the source into an included path? <> Moving on, when I tried to read the “WinPcap tutorial: a step by step guide to program WinPcap” there are many sample programs. It seems to me like the obvious thing to do is to compile/build/run these porgrams, then read over the analysis provided in the tutorials. However (and this has been MOST frustrating so far) EVERY program that I try to compile give me “unresolved external symbols” errors when linking. This error basically means “you have a data member or a function that is defined in one of your header files, but it’s never implemented anywhere in a corresponding .c or .lib file. How can this be? I’ll give a concrete example: <> The very first sample program in the tutorial is “Obtaining the Device List”. When I cut and paste the code into VC++ 6.0, at link-time I get the following error: <> Linking... main.obj : error LNK2001: unresolved external symbol _pcap_freealldevs main.obj : error LNK2001: unresolved external symbol _pcap_findalldevs Debug/blah.exe : fatal error LNK1120: 2 unresolved externals Error executing link.exe. <> So I go and look up pcap_freealldevs in the online documentation. The documentation tells me that pcap_freealldevs is defined in pcap.h, and is implemented in inet.c. I check my include and source directories in my VC++ options, and the directories containing the files pcap.h and inet.c are both listed. So why am I getting an unresolved external symbol error? Why is VC++ not seeing the functions pcap_freealldevs and pcap_findalldevs in inet.c, like it should? <> I’m sorry this is such a long post, but I am ready to pull my hair out. I am simply floored right now… any help in any form whatsoever is going to be much appreciated, thanks. <> Cheers, Mario================================================================ This is the WinPcap users list. It is archived at http://www.mail-archive.com/winpcap-users@winpcap.polito.it/ To unsubscribe use mailto: [EMAIL PROTECTED] ================================================================ ================================================================== This is the WinPcap users list. It is archived at http://www.mail-archive.com/winpcap-users@winpcap.polito.it/ To unsubscribe use mailto: [EMAIL PROTECTED] ================================================================== |
- [WinPcap-users] General Questions, I'm So Lost Mario Hollibaugh
- Re: [WinPcap-users] General Questions, I'm So Lost Flamur Rogova
- Re: [WinPcap-users] General Questions, I'm So Lost Terry Braun
- Re: [WinPcap-users] General Questions, I'm So Lo... Daniel Quintero
- Re: [WinPcap-users] General Questions, I'm So Lo... Mario Hollibaugh