I have tried to install libnet-devel, I got this error
rpm -ivh libnet-devel-1.1.2.1-3.i386.rpm warning: libnet-devel-1.1.2.1-3.i386.rpm: V3 DSA signature: NOKEY, key ID e01260f1 Preparing... ########################################### [100%] file /usr/bin/libnet-config from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet/libnet-asn1.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet/libnet-functions.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet/libnet-headers.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet/libnet-macros.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2 file /usr/include/libnet/libnet-structures.h from install of libnet-devel-1.1.2.1-3 conflicts with file from package libnet-1.0.2a-2