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Infrastructure libnfnetlink / libctnetlink
libnfnetlink
- provides low layer communications between netlink socket and high layer
library
- provides generic functions to create and parse nf_attr's
- hides all details of netlink socket
- provides open/close/receive/listen functions only to be used by other
libraries (libctnetlink/libpkttnetlink/...)
libctnetlink:
- provides high layer interface for applications interfacing with conntrack
kernel code
- event messages (to be implemented)
- reading and deleting ip_conntrack's
- reading, deleting and creating ip_conntrack_expect's
Layout of nfnetlink data packet
struct nlmsghdr - netlink internal
struct nfgenmsg - information about
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