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| author | Alejandro Colomar <alx@kernel.org> | 2025-11-24 00:03:08 +0100 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2025-11-25 01:09:42 +0100 |
| commit | 4fc3d6888a2d97c3d1bbfcacfb36c8ce53ad3dd9 (patch) | |
| tree | c0191715788f29c443c21aa7ebf8d2c1968705d1 | |
| parent | 5a73a28d4629e07168b29141742e888b00ae7b0c (diff) | |
| download | man-pages-4fc3d6888a2d97c3d1bbfcacfb36c8ce53ad3dd9.tar.gz | |
man/man2const/{IPPROTO_IP,IP_MTU}.2const: Split IP_MTU from IPPROTO_IP(2const)
Signed-off-by: Alejandro Colomar <alx@kernel.org>
| -rw-r--r-- | man/man2const/IPPROTO_IP.2const | 17 | ||||
| -rw-r--r-- | man/man2const/IP_MTU.2const | 44 |
2 files changed, 48 insertions, 13 deletions
diff --git a/man/man2const/IPPROTO_IP.2const b/man/man2const/IPPROTO_IP.2const index ec299334ff..b8fe34f769 100644 --- a/man/man2const/IPPROTO_IP.2const +++ b/man/man2const/IPPROTO_IP.2const @@ -87,16 +87,8 @@ fail with the error .BR IP_LOCAL_PORT_RANGE (2const) .TQ .BR IP_MSFILTER (2const) -.TP -.BR IP_MTU " (since Linux 2.2)" -.\" Precisely: since Linux 2.1.124 -Retrieve the current known path MTU of the current socket. -Returns an integer. -.IP -.B IP_MTU -is valid only for -.BR getsockopt (2) -and can be employed only when the socket has been connected. +.TQ +.BR IP_MTU (2const) .TP .BR IP_MTU_DISCOVER " (since Linux 2.2)" .\" Precisely: since Linux 2.1.124 @@ -142,7 +134,7 @@ the path MTU per destination host. When it is connected to a specific peer with .BR connect (2), the currently known path MTU can be retrieved conveniently using the -.B IP_MTU +.BR IP_MTU (2const) socket option (e.g., after an .B EMSGSIZE error occurred). @@ -168,7 +160,7 @@ path MTU, connect a datagram socket to the destination address using and retrieve the MTU by calling .BR getsockopt (2) with the -.B IP_MTU +.BR IP_MTU (2const) option. .IP It is possible to implement RFC 4821 MTU probing with @@ -714,7 +706,6 @@ See See .BR ip (7). .SH NOTES -.BR IP_MTU , .BR IP_MTU_DISCOVER , .BR IP_RECVORIGDSTADDR , .BR IP_PASSSEC , diff --git a/man/man2const/IP_MTU.2const b/man/man2const/IP_MTU.2const new file mode 100644 index 0000000000..a444fa4bb1 --- /dev/null +++ b/man/man2const/IP_MTU.2const @@ -0,0 +1,44 @@ +.\" Copyright, the authors of the Linux man-pages project +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.TH IP_MTU 2const (date) "Linux man-pages (unreleased)" +.SH NAME +IP_MTU +\- +path maximum transmission unit size +.SH LIBRARY +Standard C library +.RI ( libc ,\~ \-lc ) +.SH SYNOPSIS +.nf +.BR "#include <netinet/in.h>" " /* Definition of " IP* " constants */" +.B #include <sys/socket.h> +.P +.BI int\~getsockopt(int\~ sockfd ,\~IPPROTO_IP,\~IP_MTU, +.BI " int\~*" val ,\~sizeof(int)); +.fi +.SH DESCRIPTION +.TP +.BR IP_MTU " (since Linux 2.2)" +.\" Precisely: since Linux 2.1.124 +Retrieve the current known path MTU of the current socket. +Returns an integer. +.IP +.B IP_MTU +is valid only for +.BR getsockopt (2) +and can be employed only when the socket has been connected. +.SH ERRORS +See +.BR IPPROTO_IP (2const). +See +.BR getsockopt (2). +See +.BR ip (7). +.SH STANDARDS +Linux. +.SH SEE ALSO +.BR IPPROTO_IP (2const), +.BR getsockopt (2), +.BR ip (7) |