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Diffstat (limited to 'man/man2const/IP_MTU.2const')
| -rw-r--r-- | man/man2const/IP_MTU.2const | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/man/man2const/IP_MTU.2const b/man/man2const/IP_MTU.2const new file mode 100644 index 0000000000..3d3f4b685b --- /dev/null +++ b/man/man2const/IP_MTU.2const @@ -0,0 +1,43 @@ +.\" 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 +Retrieve the current known path MTU of the current socket. +.P +.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 HISTORY +Linux 2.2. +.\" Precisely: since Linux 2.1.124 +.SH SEE ALSO +.BR IPPROTO_IP (2const), +.BR getsockopt (2), +.BR ip (7) |