Installation of the classification modules in the CoMo architecture:


1- Add in the $COMO_DIR/modules/CMakeLists.txt file to the list of modules:

feature
class_svm
class_bayes
class_ports


2- add the source files

feature.c
class_svm.c
class_bayes.c
class_ports.c

in the directory $COMO_DIR/modules


3- In $COMO_DIR apply the como.patch

patch -p1 < como.patch


4- in $COMO_DIR:

cmake -DCMAKE_INSTALL_PREFIX=$COMO_DIR $COMO_DIR -DCMAKE_BUILD_TYPE=release -DCMAKE_SHARED_LINKER_FLAGS=-pthread
make
make install



5-Here is an example of the part of the configuration file for the feature module (in $COMO_DIR/etc directory):

module "feature"
     description ""
     filter "udp or tcp"
     hashsize "200000"            #size of the hashtablem determine the execution efficiency
     args "num_received_packets=6"     # number of packets received to emit a classification verdict
     args "flow_timeout=60"      # idle flow expiration timeout 
     args "interval=1"    #flush interval
     args "classifiers=class_ports,class_bayes,class_svm"    #list of classification algorithms, separated by ","
     args "classif_dir=$COMO_DIR/libexec/como-1.0"   #directory containing the classification modules
end

The directory $classif_dir reported in the configuration file has to contain the 
directories with the classification models:

models_svm/
models_bayes/
application_port_mapping_crl_reef/

(an example set of models is on the web site) with the svm and bayes models we achieved on CAIDA traces.
For the port-based classifier, please download from www.caida.org Application_ports_Master.txt file and insert it in a directory named application_port_mapping_crl_reef/ (inside classif_dir).
Application_ports_Master.txt is the port-application mapping file of coralreef software.




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To create your own classifier, extending the existing files, please refer to
the file

classifier_example.c

containing an example of the two required functions.