Commit Graph
3 Commits
Author SHA1 Message Date
Lorenz Bauer 711f33c999 unix: add ParseOrigDstAddr
Add a function which turns a SocketControlMessage into a Sockaddr.
This can be used with IP(V6)_RECVORIGDSTADDR to retrieve the original
destination address of a packet.

Change-Id: Ib2d80cd01be6642e8b918cbc1584d4a49c3c6f1e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/355609
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-10-25 11:29:17 +00:00
Lorenz Bauer 8e5104632a unix: add functions to encode Inet4Pktinfo and Inet6Pktinfo
It's possible to control the source address of a UDP packet by
passing a socket control message of type IP_PKTINFO or IPV6_PKTINFO.
This is a somewhat esoteric feature of the network stack, but it's
extremely useful feature when you really need it.

Change-Id: I8300575f975679f6689d6f1282af253ba62e8f9d
Reviewed-on: https://go-review.googlesource.com/c/sys/+/355610
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Tobias Klauser <tobias.klauser@gmail.com>
2021-10-22 21:59:31 +00:00
Lorenz Bauer 528a39cd75 unix: add PidfdOpen and PidfdGetfd
Add wrappers for the pidfd_open and pidfd_getfd sycalls, available since 5.3.

PIDFD_NONBLOCK is defined manually since mkerrors.sh doesn't handle including
linux/pidfd.h well.

See https://man7.org/linux/man-pages/man2/pidfd_open.2.html

Change-Id: I68dfb52f6a7a44b7f3324a8379860a1bb765e71b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/347332
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
2021-09-09 19:32:31 +00:00