Date: Thu, 10 Oct 2019 18:39:11 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r353412 - in releng/12.1: share/man/man4 sys/netinet Message-ID: <201910101839.x9AIdBVZ001625@repo.freebsd.org>
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Author: tuexen Date: Thu Oct 10 18:39:11 2019 New Revision: 353412 URL: https://svnweb.freebsd.org/changeset/base/353412 Log: MFS r353402: 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 Differential Revision: https://reviews.freebsd.org/D21619 Reviewed by: bcr@ Approved by: re (gjb@) Modified: releng/12.1/share/man/man4/siftr.4 releng/12.1/sys/netinet/siftr.c Directory Properties: releng/12.1/ (props changed) Modified: releng/12.1/share/man/man4/siftr.4 ============================================================================== --- releng/12.1/share/man/man4/siftr.4 Thu Oct 10 18:27:05 2019 (r353411) +++ releng/12.1/share/man/man4/siftr.4 Thu Oct 10 18:39:11 2019 (r353412) @@ -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: releng/12.1/sys/netinet/siftr.c ============================================================================== --- releng/12.1/sys/netinet/siftr.c Thu Oct 10 18:27:05 2019 (r353411) +++ releng/12.1/sys/netinet/siftr.c Thu Oct 10 18:39:11 2019 (r353412) @@ -916,7 +916,7 @@ siftr_chkpkt(void *arg, struct mbuf **m, struct ifnet * 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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