tcpdump mailing list archives
Re: Remove the eproto_db symbol exporting to keep the DLL delay-load feature on Windows
From: Yang Luo <hsluoyb () gmail com>
Date: Tue, 28 Jun 2016 16:41:23 +0800
The weird thing is that the original libpcap used by Npcap/WinPcap also exported eproto_db, but the build of WinDump doesn't complain that link error. I don't know what the difference is here? Error 646 error LNK1194: cannot delay-load 'wpcap.dll' due to import of data symbol '__imp_eproto_db'; link without /DELAYLOAD:wpcap.dll Cheers, Yang On Tue, Jun 28, 2016 at 1:56 PM, Yang Luo <hsluoyb () gmail com> wrote:
Hi list, Because of libpcap has exported the a data structure called eproto_db ( https://github.com/the-tcpdump-group/libpcap/blob/master/nametoaddr.c#L320), when I compiled WinDump in MSVC specifying "wpcap.dll" as a delay loaded DLL, I encountered the link error 1194. The cause is here: https://msdn.microsoft.com/en-us/library/w59k653y%28v=vs.80%29.aspx?f=255&MSPPError=-2147217396 . Delay loading wpcap.dll is an important part for the switch between Npcap mode and WinPcap mode. And from the comment, it seems that exporting this data is not very critical. So can we remove the "PCAP_API_DEF" at the line beginning to disable the exporting? Cheers, Yang
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Current thread:
- Remove the eproto_db symbol exporting to keep the DLL delay-load feature on Windows Yang Luo (Jun 27)
- Re: Remove the eproto_db symbol exporting to keep the DLL delay-load feature on Windows Yang Luo (Jun 28)
- Re: Remove the eproto_db symbol exporting to keep the DLL delay-load feature on Windows Guy Harris (Jun 30)