| ng_tcpmss.4 (147432) | ng_tcpmss.4 (242997) |
|---|---|
| 1.\" Copyright (c) 2005 Gleb Smirnoff 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" | 1.\" Copyright (c) 2005 Gleb Smirnoff 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" |
| 25.\" $FreeBSD: head/share/man/man4/ng_tcpmss.4 147432 2005-06-16 18:46:17Z ru $ | 25.\" $FreeBSD: head/share/man/man4/ng_tcpmss.4 242997 2012-11-13 20:41:36Z joel $ |
| 26.\" 27.Dd June 9, 2005 28.Dt NG_TCPMSS 4 29.Os 30.Sh NAME 31.Nm ng_tcpmss 32.Nd "netgraph node to adjust TCP MSS option" 33.Sh SYNOPSIS --- 6 unchanged lines hidden (view full) --- 40of TCP packets. 41This node accepts an arbitrary number of hooks. 42Initially a new hook is considered unconfigured. 43The 44.Dv NG_TCPMSS_CONFIG 45control message is used to configure a hook. 46.Sh CONTROL MESSAGES 47This node type supports the generic control messages, plus the following. | 26.\" 27.Dd June 9, 2005 28.Dt NG_TCPMSS 4 29.Os 30.Sh NAME 31.Nm ng_tcpmss 32.Nd "netgraph node to adjust TCP MSS option" 33.Sh SYNOPSIS --- 6 unchanged lines hidden (view full) --- 40of TCP packets. 41This node accepts an arbitrary number of hooks. 42Initially a new hook is considered unconfigured. 43The 44.Dv NG_TCPMSS_CONFIG 45control message is used to configure a hook. 46.Sh CONTROL MESSAGES 47This node type supports the generic control messages, plus the following. |
| 48.Bl -tag -width indent 49.It Dv NGM_TCPMSS_CONFIG Pq Li config | 48.Bl -tag -width foo 49.It Dv NGM_TCPMSS_CONFIG Pq Ic config |
| 50This control message configures node to do given MSS adjusting on 51a particular hook. 52It requires the 53.Vt "struct ng_tcpmss_config" 54to be supplied as an argument: 55.Bd -literal 56struct ng_tcpmss_config { 57 char inHook[NG_HOOKSIZ]; --- 6 unchanged lines hidden (view full) --- 64.Va inHook 65would be checked for TCP MSS option and the latter would be 66reduced down to 67.Va maxMSS 68if it exceeds 69.Va maxMSS . 70After that, packets would be sent to hook 71.Va outHook . | 50This control message configures node to do given MSS adjusting on 51a particular hook. 52It requires the 53.Vt "struct ng_tcpmss_config" 54to be supplied as an argument: 55.Bd -literal 56struct ng_tcpmss_config { 57 char inHook[NG_HOOKSIZ]; --- 6 unchanged lines hidden (view full) --- 64.Va inHook 65would be checked for TCP MSS option and the latter would be 66reduced down to 67.Va maxMSS 68if it exceeds 69.Va maxMSS . 70After that, packets would be sent to hook 71.Va outHook . |
| 72.It Dv NGM_TCPMSS_GET_STATS Pq Li getstats | 72.It Dv NGM_TCPMSS_GET_STATS Pq Ic getstats |
| 73This control message obtains statistics for a given hook. 74The statistics are returned in 75.Vt "struct ng_tcpmss_hookstat" : 76.Bd -literal 77struct ng_tcpmss_hookstat { 78 uint64_t Octets; /* total bytes */ 79 uint64_t Packets; /* total packets */ 80 uint16_t maxMSS; /* maximum MSS */ 81 uint64_t SYNPkts; /* TCP SYN packets */ 82 uint64_t FixedPkts; /* changed packets */ 83}; 84.Ed | 73This control message obtains statistics for a given hook. 74The statistics are returned in 75.Vt "struct ng_tcpmss_hookstat" : 76.Bd -literal 77struct ng_tcpmss_hookstat { 78 uint64_t Octets; /* total bytes */ 79 uint64_t Packets; /* total packets */ 80 uint16_t maxMSS; /* maximum MSS */ 81 uint64_t SYNPkts; /* TCP SYN packets */ 82 uint64_t FixedPkts; /* changed packets */ 83}; 84.Ed |
| 85.It Dv NGM_TCPMSS_CLR_STATS Pq Li clrstats | 85.It Dv NGM_TCPMSS_CLR_STATS Pq Ic clrstats |
| 86This control message clears statistics for a given hook. | 86This control message clears statistics for a given hook. |
| 87.It Dv NGM_TCPMSS_GETCLR_STATS Pq Li getclrstats | 87.It Dv NGM_TCPMSS_GETCLR_STATS Pq Ic getclrstats |
| 88This control message obtains and clears statistics for a given hook. 89.El 90.Sh EXAMPLES 91In the following example, packets are injected into the 92.Nm tcpmss 93node using the 94.Xr ng_ipfw 4 95node. --- 30 unchanged lines hidden --- | 88This control message obtains and clears statistics for a given hook. 89.El 90.Sh EXAMPLES 91In the following example, packets are injected into the 92.Nm tcpmss 93node using the 94.Xr ng_ipfw 4 95node. --- 30 unchanged lines hidden --- |