On 02/01/10 22:02, Lukasz Jaroszewski wrote:
Hello, I am wondering about most elegant and proper way to get IP header fields from mbuf, using PFILs. I have read Murat Balaban paper on PFIL_HOOKS where I found some example function. Question is how can I access IP header field in such manner.static int hisar_chkinput(void *arg, struct mbuf **m, struct ifnet *ifp, int dir, struct inpcb *inp) { in_bytes += (*m)->m_len; return 0; }
I hacked on a tool that uses pfil hooks to do in-kernel TCP data gathering. Probably has some useful snippets for you to look at in addition to Robert's suggestion.
http://svn.freebsd.org/base/projects/tcp_ffcaia2008_head/sys/netinet/siftr.c Cheers, Lawrence _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
