How to Compile Gopacket on Windows 64-bit with \'File in Wrong Format\' Error?

Compiling Gopacket on Windows 64-bit

Problem:

When attempting to compile gopacket on Windows 10 for 64-bit (GOARCH=amd64), an error occurs indicating "File in wrong format" when adding wpcap symbols to the binary.

Solution:

To compile gopacket on Windows 64-bit successfully, follow these steps:

1. Install Go for 64-bit (go_amd64).
2. Install TDM GCC x64 and add its binaries to the PATH variable.
3. Add the TDM-GCC x86_64-w64-mingw32bin directory to the PATH variable.
4. Install Winpcap.
5. Download the Winpcap developer's pack and extract it to C:.

As the Winpcap developer's pack lacks Linux static libraries (libwpcap.a and libpacket.a), generate them manually:

1. Copy wpcap.dll and packet.dll to a temporary folder.
2. Run gendef on both files to generate .def files.
3. Generate the static libraries using dlltool with the following commands:

dlltool --as-flags=--64 -m i386:x86-64 -k --output-lib libwpcap.a --input-def wpcap.def
dlltool --as-flags=--64 -m i386:x86-64 -k --output-lib libpacket.a --input-def packet.def

4. Copy libwpcap.a and libpacket.a to C:WpdPackLibx64.

With these steps completed, gopacket should compile without errors on Windows 64-bit.

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