CORRECTION: I omitted the troublesome steps (underlined) when describing the problem: git clone https://<wireshark repo> wireshark cd wireshark git checkout wireshark-3.4.4 cd wireshark/epan/dissectors
*cp ~/myfoo.tgz . #copy dissector code into wireshark clone* *tar xvf myfoo.tgz #extract the dissector code (details in previous email)* cd ../../.. mkdir build cd build cmake ../wireshark #this step worked previously but not on a fresh wireshark clone now make asn1 #with relevant entries in two CMakeListsCustom files make On Sun, Apr 18, 2021 at 8:15 PM Vincent Randal <vtran...@gmail.com> wrote: > Hello Wireshark-dev community, > > Apparently, I still don't have the correct sequence of steps necessary for > first time generation of "packet-myfoo.c" and "packet-myfoo.h" for a new > ASN.1-based dissector called myfoo. Details follow. > > I would like to understand (much better than I do) how to add an > ASN.1-based dissector to epan/dissectors/asn1 in a fresh clone of > wireshark. I got a lot of help from a lot of people last week (for which I > am grateful) but I must still be missing a step here: > git clone https://<wireshark repo> wireshark > cd wireshark > git checkout wireshark-3.4.4 > cd .. > mkdir build > cd build > cmake ../wireshark #this step worked previously but not on a fresh > wireshark clone now > make asn1 #with relevant entries in two CMakeListsCustom files > make > > When I add my dissector folder "myfoo" to epan/dissectors/asn1 here's the > relevant error messages from cmake (with some highlighting by me): > > > > > > > > > > > *-- Configuring doneCMake Error at epan/dissectors/CMakeLists.txt:2004 > (add_library): Cannot find source file: > /home/vtrandal/ws1/wireshark/epan/dissectors/packet-myfoo.c Tried > extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm .hpp > .hxx .in .txxCMake Error at epan/dissectors/CMakeLists.txt:2004 > (add_library): No SOURCES given to target: dissectors* > [end of cmake error messages] > > The point of the above cmake error messages is that the "packet-myfoo.c" > and "packet-myfoo.h" files have not yet been generated (and I don't know > how to generate them). I do not know how I got past the cmake step before, > but I was lucky (and unlucky now). The ASN.1-based dissector code is in the > attached .tgz file which I extract in epan/dissectors as follows: > tar xvf myfoo.tgz > ./CMakeListsCustom.txt <== contains entry for myfoo > ./asn1/CMakeListsCustom.txt <== contains entry for myfoo > ./asn1/myfoo/ > ./asn1/myfoo/myfoo.asn > ./asn1/myfoo/myfoo.cnf > ./asn1/myfoo/CMakeLists.txt > ./asn1/myfoo/packet-myfoo-template.h > ./asn1/myfoo/packet-myfoo-template.c > > I apologize in advance for being thick-headed about the process of adding > a new ASN.1-based dissector to epan/dissectors/asn1 in Wireshark. With help > from a lot of people I got it to compile previously (again for which I am > grateful). But I cannot repeat that success starting with a fresh clone of > wireshark regardless of the branch. Somehow I still don't have the correct > sequence of steps necessary to generate "packet-myfoo.c" and > "packet-myfoo.h" the first time. With my dissector code in epan/dissectors > the cmake step fails and I cannot make anything. > > Vincent > > NOTE: The attached dissector code is based on the simple ASN.1-based > dissector example online. > https://www.wireshark.org/docs/wsdg_html_chunked/SimpleASN1BasedDissector.html > >
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