OnPacket conflict between gopacket.example.go and tls.downgrade.go

[monyettenyom]

Hey all, so I did build two paket.proxy-plugins you had provided, which are gopacket.example.go and tls.downgrade.go.

tls.downgrade.go is fixed by @buffermet . Thanks, boss!

gopacket.example.go and tls.downgrad.go were built successfully.

But as I tried to build bettercap with this: make build

I got these: go build -o bettercap . ./tls.downgrade.go:74:6: OnPacket redeclared in this block previous declaration at ./gopacket.example.go:11:41 make: *** [Makefile:10: build] Error 2

What did I do wrong?

Environment: OS version and architecture you are using: Kali GNU/Linux Rolling 2019.4 Go version if building from sources: go version go1.13.4 linux/amd64

[buffermet]

In which directory did you place and build the tls.downgrade.go file?

[buffermet]

Go plugins for the packet.proxy module should be built in the $GOPATH/src/github.com/bettercap/bettercap directory.

[monyettenyom]

Also, if I didn't misunderstand, I have to pull the source code with: go get -u github.com/bettercap/bettercap The plugins should be downloaded directly in the folder, right? Or did I misunderstand? Please tell me step by step how to download and install bettercap with the plugins, I'm very confused because of too many steps I have to do.

[monyettenyom]

I did both sample steps I found on this: https://www.bettercap.org/installation/

I downloaded the source code and its dependencies, just like the steps "Compiling from sources"

Because I got problems with downloading the dependencies, I have done the steps "Linux deploy method" At the end of the step of Linux deploy method, I got problem with packet proxy plugins. I downloaded the plugins independently and changed the lines, just like you had suggested this morning west Europe time. And then I compiled the plugins independently. I had no problem with compiling the plugins.

Soon as I tried to compile bettercap, I got the error message.

I mixed up the steps, I know. How can I undo this?

[buffermet]

The plugins are in the bettercap/packet.proxy-plugins repository. You can clone it with git or go get.

To install a packet.proxy plugin, you have to build it yourself inside bettercap's source directory at $GOPATH/src/github.com/bettercap/bettercap.

Follow the build instructions from the documentation and you will find a new .so file in bettercap's source directory. Set this file's path as the value of bettercap's packet.proxy.plugin environment variable. Then you can start using the packet.proxy module.

[buffermet]

You still had the gopacket.example.go file in bettercap's source directory when you tried to build bettercap.

[monyettenyom]

Should I delete the gopacket.example.go?

[buffermet]

~~You should only have 1 packet.proxy .go plugin file in the source directory, otherwise compilation fails.~~ You shouldn't have any packet.proxy .go files in the source directory when you build bettercap in case of duplicate declarations.

[monyettenyom]

I can't find the bettercap folder.

locate bettercap /usr/lib/libettercap.so /usr/lib/libettercap.so.0 /usr/lib/libettercap.so.0.0.0 /usr/share/icons/hicolor/16x16/apps/kali-bettercap.png /usr/share/icons/hicolor/22x22/apps/kali-bettercap.png /usr/share/icons/hicolor/24x24/apps/kali-bettercap.png /usr/share/icons/hicolor/256x256/apps/kali-bettercap.png /usr/share/icons/hicolor/32x32/apps/kali-bettercap.png /usr/share/icons/hicolor/48x48/apps/kali-bettercap.png /usr/share/kali-menu/applications/kali-bettercap.desktop

[buffermet]

It's in your $GOPATH folder..

Can you please give us the output of which bettercap?

[monyettenyom]

root@lenovo:~# ls 1 capture-01.kismet.netxml ettercaplog Pictures bettercap.history capture-01.log.csv getmecamtool Public build Desktop go Templates capture-01.cap Documents hashcat Videos capture-01.csv Downloads intel wget-log capture-01.kismet.csv dsniff.services Music wget-log.1 root@lenovo:~# cd go root@lenovo:~/go# ls bin pkg src root@lenovo:~/go# cd bin root@lenovo:~/go/bin# ls bettercap root@lenovo:~/go/bin# which bettercap root@lenovo:~/go/bin#

[buffermet]

Your go path is in your home folder, so you can find bettercap's source folder at ~/go/src/github.com/bettercap/bettercap.

[monyettenyom]

I've installed successfully, thanks a lot. I've found the tls.downgrade.so, which I had compiled and I found bettercap folder in the github.com folder. I ran make build and make install in the folder and bettercap is installed.

output of which bettercap is now: root@lenovo:~# which bettercap /usr/local/bin/bettercap