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Scanning and packet sniffing software; specifically network mapper (nmap) and tcpdump are tools I now use almost daily in some capacity. The underlying software of tcpdump - libpcap (packet capture library) - I have on three occasions needed to leverage pcap libs for various tasks. In the final part of the libpcap series the full source listing of the pieces from part one and part two are cobbled together into a single program. The Makefile is also constructed in addition to a small barely functional packet injector program which shows another side of libpcap; packets don't just have to be read they can be written as well.
Scanning and packet sniffing software; specifically network mapper (nmap) and tcpdump are tools I now use almost daily in some capacity. The underlying software of tcpdump - libpcap (packet capture library) - I have on three occasions needed to leverage pcap libs for various tasks. In the final part of the libpcap series the full source listing of the pieces from part one and part two are cobbled together into a single program. The Makefile is also constructed in addition to a small barely functional packet injector program which shows another side of libpcap; packets don't just have to be read they can be written as well.
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