1.\" Copyright (c) 2016 Luigi Rizzo, Universita` di Pisa 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 12.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 13.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 16.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22.\" SUCH DAMAGE. 23.\" 24.\" $FreeBSD$ 25.\" 26.Dd October 28, 2018 27.Dt BRIDGE 8 28.Os 29.Sh NAME 30.Nm bridge 31.Nd netmap client to bridge two netmap ports 32.Sh SYNOPSIS 33.Bk -words 34.Bl -tag -width "bridge" 35.It Nm 36.Op Fl i Ar port 37.Op Fl b Ar batch size 38.Op Fl w Ar wait-link 39.Op Fl v 40.Op Fl c 41.El 42.Ek 43.Sh DESCRIPTION 44.Nm 45is a simple netmap application that bridges packets between two netmap ports. 46If the two netmap ports use the same netmap memory region 47.Nm 48forwards packets without copying the packets payload (zero-copy mode), unless 49explicitly prevented by the 50.Fl c 51flag. 52.Bl -tag -width Ds 53.It Fl i Ar port 54Name of the netmap port. 55It can be supplied up to two times to identify the ports that must be bridged. 56Any netmap port type (physical interface, VALE switch, pipe, monitor port...) 57can be used. 58If the option is supplied only once, then it must be for a physical interface and, in that case, 59.Nm 60will bridge the port and the host stack. 61.It Fl b Ar batch-size 62Maximum number of packets to send in one operation. 63.It Fl w Ar wait-link 64indicates the number of seconds to wait before transmitting. 65It defaults to 2, and may be useful when talking to physical 66ports to let link negotiation complete before starting transmission. 67.It Fl v 68Enable verbose mode 69.It Fl c 70Disable zero-copy mode. 71.El 72.Sh SEE ALSO 73.Xr netmap 4 , 74.Xr pkt-gen 8 , 75.Xr lb 8 76.Sh AUTHORS 77.An -nosplit 78.Nm 79has been written by 80.An Luigi Rizzo 81and 82.An Matteo Landi 83at the Universita` di Pisa, Italy. 84