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share/man/man4/tcp.4
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||||||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||||||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||||||||
.\" SUCH DAMAGE. | .\" SUCH DAMAGE. | ||||||||
.\" | .\" | ||||||||
.\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93 | .\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93 | ||||||||
.\" $FreeBSD$ | .\" $FreeBSD$ | ||||||||
.\" | .\" | ||||||||
.Dd January 8, 2022 | .Dd February 10, 2022 | ||||||||
.Dt TCP 4 | .Dt TCP 4 | ||||||||
.Os | .Os | ||||||||
.Sh NAME | .Sh NAME | ||||||||
.Nm tcp | .Nm tcp | ||||||||
.Nd Internet Transmission Control Protocol | .Nd Internet Transmission Control Protocol | ||||||||
.Sh SYNOPSIS | .Sh SYNOPSIS | ||||||||
.In sys/types.h | .In sys/types.h | ||||||||
.In sys/socket.h | .In sys/socket.h | ||||||||
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Disable ECN. | Disable ECN. | ||||||||
.It 1 | .It 1 | ||||||||
Allow incoming connections to request ECN. | Allow incoming connections to request ECN. | ||||||||
Outgoing connections will request ECN. | Outgoing connections will request ECN. | ||||||||
.It 2 | .It 2 | ||||||||
Allow incoming connections to request ECN. | Allow incoming connections to request ECN. | ||||||||
Outgoing connections will not request ECN. | Outgoing connections will not request ECN. | ||||||||
(default) | (default) | ||||||||
.It 3 | |||||||||
Negotiate on incoming connection for Accurate ECN, ECN, or no ECN. | |||||||||
pauamma_gundo.com: Will the audience for this likely know what "accurate ECN" mean? | |||||||||
Done Inline ActionsI would think so. Once adoped as an proposed Standard RFC, the RFC number can be added. In between, this is the current draft document: https://www.ietf.org/archive/id/draft-ietf-tcpm-accurate-ecn-16.html rscheff: I would think so. Once adoped as an proposed Standard RFC, the RFC number can be added. In… | |||||||||
Outgoing connections will request Accurate ECN and fall back to | |||||||||
ECN depending on the capabilities of the server. | |||||||||
.It 4 | |||||||||
Negotiate on incoming connection for Accurate ECN, ECN, or no ECN. | |||||||||
Done Inline Actions
pauamma_gundo.com: | |||||||||
Outgoing connections will not request ECN. | |||||||||
.El | .El | ||||||||
.It Va ecn.maxretries | .It Va ecn.maxretries | ||||||||
Number of retries (SYN or SYN/ACK retransmits) before disabling ECN on a | Number of retries (SYN or SYN/ACK retransmits) before disabling ECN on a | ||||||||
specific connection. | specific connection. | ||||||||
This is needed to help with connection establishment | This is needed to help with connection establishment | ||||||||
when a broken firewall is in the network path. | when a broken firewall is in the network path. | ||||||||
.It Va pmtud_blackhole_detection | .It Va pmtud_blackhole_detection | ||||||||
Enable automatic path MTU blackhole detection. | Enable automatic path MTU blackhole detection. | ||||||||
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Will the audience for this likely know what "accurate ECN" mean?