Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
.B IPV6_MTU
.BR getsockopt ():
Retrieve the current known path MTU of the current socket.
-Only valid when the socket has been connected.
+Valid only when the socket has been connected.
Returns an integer.
.BR setsockopt ():
Such control messages contain a
.IR "struct in6_pktinfo" ,
as per RFC 3542.
-Only allowed for
+Allowed only for
.B SOCK_DGRAM
or
.B SOCK_RAW
All these header options can also be set for outgoing packets
by putting the appropriate control message into the control buffer of
.BR sendmsg (2).
-Only allowed for
+Allowed only for
.B SOCK_DGRAM
or
.B SOCK_RAW
.B IPV6_ROUTER_ALERT
Pass forwarded packets containing a router alert hop-by-hop option to
this socket.
-Only allowed for
+Allowed only for
.B SOCK_RAW
sockets.
The tapped packets are not forwarded by the kernel, it is the