# using binpac for protocol parser **URL:** \ **Category:** Zeek\ **Created:** [January 20, 2015, 11:45am UTC](https://community.zeek.org/t/using-binpac-for-protocol-parser/3438 "2015-01-20T11:45:59Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Emmanuel\_TORQUATO](https://avatars.discourse-cdn.com/v4/letter/e/ecb155/32.png) [@Emmanuel\_TORQUATO](https://community.zeek.org/u/Emmanuel_TORQUATO)\ **Post date:** [January 20, 2015, 11:45am UTC](https://community.zeek.org/t/using-binpac-for-protocol-parser/3438/1 "2015-01-20T11:45:59Z")
Hello All, I would like to use binpac for protocol analyzer creation. The protocol is called cb2a, it’s a bank exchange protocol. I find very few sources which explains the way of building analyzers using binpac from scratch. The only ones I have are “binpac: A yacc for writing application protocol Parsers” and the sample-message example. However, I have been able to use binpac for file creation .cc and .h. When adding the new folder in /usr/src/bro/src/analyzer/protocol/cb2a in the CMakeLists.txt with the below files and doing ./configure and then make, I have the error “Linking CXX executable bro CMakeFiles/bro.dir/plugins.cc.o: In function `\_\_make\_sure\_to\_use\_plugin\_globals()’: /usr/src/bro-2.3/build/src/plugins.cc:69: undefined reference to `plugin::Bro\_Cb2a::\_\_plugin’ “ There is something to do with file Plugin.cc but I don’t know what… this file is not generated by binpac, so I have done one, but still the same issue. Anyone can help me please? Files: ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/zeek/original/1X/f09d732bc2cc7c7cc7e35db67cf4e1d5233ce7a7.png) [@system](https://community.zeek.org/u/system)\ **Post date:** [May 6, 2022, 3:42pm UTC](https://community.zeek.org/t/using-binpac-for-protocol-parser/3438/2 "2022-05-06T15:42:22Z")