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ip6(4): document IP_ORIGDSTADDR

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The option was originally added in r313524, but with incomplete
documentation.

MFC after:	1 week
Reviewed by:	karels, gbe (manpages)
Differential Revision: https://reviews.freebsd.org/D35890
This commit is contained in:
Alan Somers 2022-07-24 09:06:39 -06:00
parent 0c19c4db74
commit a043594c21
1 changed files with 12 additions and 6 deletions
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18
share/man/man4/ip6.4
View file

@ -30,7 +30,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd July 30, 2021
.Dd July 24, 2022
.Dt IP6 4
.Os
.Sh NAME
@ -156,9 +156,6 @@ datagrams sent on this socket.
.\" .It Dv IPV6_RECVDSTADDR Fa "int *"
.\" Get or set the status of whether datagrams are received with
.\" destination addresses.
.\" .It Dv IPV6_ORIGDSTADDR Fa "int *"
.\" Get or set the status of whether datagrams are received with
.\" destination addresses and destination ports.
.\" .It Dv IPV6_RETOPTS
.\" Get or set IPv6 options.
.It Dv IPV6_MULTICAST_IF Fa "u_int *"
@ -227,6 +224,14 @@ Note that setting to this value requires superuser privileges.
Drop membership from the associated multicast group.
Memberships are automatically dropped when the socket is closed or when
the process exits.
.It Dv IPV6_ORIGDSTADDR Fa "int *"
Get or set whether a datagram's original destination address and port are
returned as ancillary data along with the payload in subsequent
.Xr recvmsg 2
calls.
The information is stored in the the ancillary data as a
.Tn sockaddr_in6
structure.
.It Dv IPV6_PORTRANGE Fa "int *"
Get or set the allocation policy of ephemeral ports for when the kernel
automatically binds a local address to this socket.
@ -420,8 +425,9 @@ The
.Dv IPV6_HOPLIMIT ,
.Dv IPV6_HOPOPTS ,
.Dv IPV6_DSTOPTS ,
.Dv IPV6_RTHDR ,
and
.Dv IPV6_RTHDR
.Dv IPV6_ORIGDSTADDR
options will return ancillary data along with payload contents in subsequent
.Xr recvmsg 2
calls with
@ -432,7 +438,7 @@ and
.Va cmsg_type
set to respective option name value (e.g.,
.Dv IPV6_HOPTLIMIT ) .
These options may also be used directly as ancillary
Some of these options may also be used directly as ancillary
.Va cmsg_type
values in
.Xr sendmsg 2