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| author | andre <andre@FreeBSD.org> | 2005-09-26 20:58:49 +0000 |
|---|---|---|
| committer | andre <andre@FreeBSD.org> | 2005-09-26 20:58:49 +0000 |
| commit | 9e496bb419904d8be631316e98be6f50295a8638 (patch) | |
| tree | c3b3debc757b8fba15afa3b5faf2a1f0dcb5d352 /share | |
| parent | 41f17dbd3afa41283a8e6fbc9bfab94dd1b9f428 (diff) | |
| download | FreeBSD-src-9e496bb419904d8be631316e98be6f50295a8638.zip FreeBSD-src-9e496bb419904d8be631316e98be6f50295a8638.tar.gz | |
Document the IP_DONTFRAG IP socket option.
Sponsored by: TCP/IP Optimization Fundraise 2005
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/ip.4 | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/share/man/man4/ip.4 b/share/man/man4/ip.4 index 4e9b1fc..d5da6e1 100644 --- a/share/man/man4/ip.4 +++ b/share/man/man4/ip.4 @@ -32,7 +32,7 @@ .\" @(#)ip.4 8.2 (Berkeley) 11/30/93 .\" $FreeBSD$ .\" -.Dd August 22, 2005 +.Dd September 26, 2005 .Dt IP 4 .Os .Sh NAME @@ -121,6 +121,20 @@ This option is only really useful when set to 255 preventing packets from outside the directly connected networks reaching local listeners on sockets. .Pp +.Dv IP_DONTFRAG +may be used to set the Don't Fragment flag on IP packets. +Currently this option is respected only on +.Xr udp 4 +and Raw +.Xr ip 4 +sockets, unless the IP_HDRINCL option has been set. +On +.Xr tcp 4 +sockets the Don't Fragment flag is controlled by the Path +MTU Discovery option. +Sending a packet larger than the MTU size of the egress interface, +determined by the destination address, returns an EMSGSIZE error. +.Pp If the .Dv IP_RECVDSTADDR option is enabled on a |
