tdorssers/cdpr-3.0

A fork of CDPR to decode CDP and LLDP packets

cdpr-3.0's Issues

[Question] Does is still compile under Linux?

Hi!

I was looking at testing the Voice vlan function. I'd like to see if this triggers a full CDP update or just the VoiceVlan response.

ldumont@eyes:~/cdpr-3.0$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-18+deb9u1' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) 

ldumont@eyes:~/cdpr-3.0$ sudo dpkg -l | grep libpcap
ii  libpcap-dev                    1.8.1-3                           all          development library for libpcap (transitional package)
ii  libpcap0.8:amd64               1.8.1-3                           amd64        system interface for user-level packet capture
ii  libpcap0.8-dev                 1.8.1-3                           amd64        development library and header files for libpcap0.8

ldumont@eyes:~/cdpr-3.0$ make cdpr 
gcc -Wall -W -O2 -std=gnu99 cdpr.c cdps.c cdp.c os_version_info.c -lpcap -o cdpr
/tmp/cczVHrZV.o: In function `main':
cdpr.c:(.text.startup+0x522): undefined reference to `print_lldp_packet'
/tmp/ccfJcxGE.o: In function `print_cdp_packet':
cdp.c:(.text+0xf4c): undefined reference to `print_location_id'
collect2: error: ld returned 1 exit status
Makefile:25: recipe for target 'cdpr' failed
make: *** [cdpr] Error 1

Use CDPR in NetworkManager dispatcher script

Hi Tim, I'm sorry this is quite specific, but I can't wrap my head around why this is not working.

I want to use the output of your cdpr tool for some actions in a NetworkManager dispatcher script.
I wrote a test script and put it in /etc/NetworkManager/dispatcher.d/
In this script, your cdpr tool is executed with -d eth0 -t 10 and the output saved to a text file for debugging.

When I directly execute this script with sudo, everything works. When NetworkManager automatically executes the script, it seems like cdpr will finish instantly, without waiting for a CDP response:

CDP Output:
Cisco Discovery Protocol Reporter
Version 3.0.4 by Tim Dorssers

Timeout enabled for 10 seconds
Use -h option to see usage

Using device eth0

Sending on 1 interface(s)
Done

Press any key to quit or wait for timeout
Listening on 1 interface(s)

Done

This happens instantly, not waiting for 10 seconds.
Do you have any idea why this might be the case?