
Download the source at:
ftp://ftp.ee.lbl.gov/libpcap.tar.Z

# tar zxvf libpcap.tar.Z
# cd libpcap-0.4/
# ./configure
# make
# make install
# make install-incl

Note: if the last command fails, with :
/usr/bin/install: cannot create regular file `/usr/local/include/net/bpf.h': No such file or directory
try making the needed directory as follows: 
# md /usr/local/include/net
and then re-run the last command


