Date: Mon, 7 Oct 2019 20:35:04 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r353290 - in head: share/man/man4 sys/netinet Message-ID: <201910072035.x97KZ4rI093341@repo.freebsd.org>
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Author: tuexen Date: Mon Oct 7 20:35:04 2019 New Revision: 353290 URL: https://svnweb.freebsd.org/changeset/base/353290 Log: In r343587 a simple port filter as sysctl tunable was added to siftr. The new sysctl was not added to the siftr.4 man page at the time. This updates the man page, and removes one left over trailing whitespace. Submitted by: Richard Scheffenegger Reviewed by: bcr@ MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D21619 Modified: head/share/man/man4/siftr.4 head/sys/netinet/siftr.c Modified: head/share/man/man4/siftr.4 ============================================================================== --- head/share/man/man4/siftr.4 Mon Oct 7 20:21:23 2019 (r353289) +++ head/share/man/man4/siftr.4 Mon Oct 7 20:35:04 2019 (r353290) @@ -30,7 +30,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 18, 2015 +.Dd October 7, 2019 .Dt SIFTR 4 .Os .Sh NAME @@ -130,6 +130,14 @@ By default, the value is set to 0, which means no hash The hashes are useful to correlate which TCP packet triggered the generation of a particular log message, but calculating them adds additional computational overhead into the fast path. +.El +.Bl -tag -offset indent -width Va +.It Va net.inet.siftr.port_filter +controls on which source or destination port siftr should capture +.Nm . +By default, the value is set to 0, which means all ports are eligible for logging. +Set to any other value, only packets where either the source or destination +port is equal to this number are logged. .El .Ss Log Format A typical Modified: head/sys/netinet/siftr.c ============================================================================== --- head/sys/netinet/siftr.c Mon Oct 7 20:21:23 2019 (r353289) +++ head/sys/netinet/siftr.c Mon Oct 7 20:35:04 2019 (r353290) @@ -918,7 +918,7 @@ siftr_chkpkt(struct mbuf **m, struct ifnet *ifp, int f * Only pkts selected by the tcp port filter * can be inserted into the pkt_queue */ - if ((siftr_port_filter != 0) && + if ((siftr_port_filter != 0) && (siftr_port_filter != ntohs(inp->inp_lport)) && (siftr_port_filter != ntohs(inp->inp_fport))) { goto inp_unlock;
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