diff options
Diffstat (limited to 'share/man/man4/tun.4')
| -rw-r--r-- | share/man/man4/tun.4 | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/share/man/man4/tun.4 b/share/man/man4/tun.4 index 9e3a44c2b05..1f3dc00abde 100644 --- a/share/man/man4/tun.4 +++ b/share/man/man4/tun.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: tun.4,v 1.49 2024/11/17 01:44:25 dlg Exp $ +.\" $OpenBSD: tun.4,v 1.50 2024/11/17 07:44:47 jmc Exp $ .\" .\" Copyright (c) 2003 Marcus D. Watts All rights reserved. .\" @@ -113,14 +113,14 @@ are set by the kernel when an interface is created, and must be set to the same values that the kernel provided. .Pp .It Dv TUNSIFMODE Fa int * -is provided for backwards compatibility. +Provided for backwards compatibility. The flags set must match what the kernel initialised them to. .Pp .It Dv TUNSCAP Fa struct tun_capabilities * Enable the prepending of network packets with a .Vt struct tun_hdr offload header, -and set which interface offload capabilities that userland can +and set which interface offload capabilities userland can handle on behalf of the kernel. .Bd -literal struct tun_capabilities { @@ -135,7 +135,7 @@ field is set with IFCAP values from It is acceptable to enable the offload header without enabling any interface offload capabilities. .Pp -The prepending of network packets with the a +The prepending of network packets with a .Vt struct tun_hdr offload header is disabled, and the interface offload capabilities are reset when the device @@ -209,7 +209,6 @@ special file regardless of which interface offload capabilities are enabled. The offload header can be read from one device special file and written directly to another without interpretation or modification. -.Pp .Bd -literal struct tun_hdr { uint16_t th_flags; @@ -223,7 +222,7 @@ The following flags can be set in .Fa th_flags to specify which offloads are requested for the current packet: .Pp -.Bl -tag -width indent -compact +.Bl -tag -width "TUN_H_ICMP_CSUM" -compact .It Dv TUN_H_VTAG .Fa th_vtag is set. @@ -249,7 +248,7 @@ can be specified at a time. .Dv TUN_H_VTAG can only be used with .Nm tap -interfacse. +interfaces. .Pp .Fa th_pad should be set to 0 when writing to the device special file, and |