*BSD: Add ioctls for BPF/network interface operations

[nathaniel-bennett]

Adds a few additional structs for BPF operations (bpf_version, bpf_stat, bpf_zbuf) as well as ioctl constants. Adds constants used for creating/manipulating network interfaces via ioctls.

Resolves #3626

[rustbot]

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[rustbot]

Some changes occurred in OpenBSD module

cc @semarie

Some changes occurred in OpenBSD module

cc @semarie

[semarie]

on OpenBSD, the test suite fails, see the remark inlined.

else, some values seems wrong:

bad SIOCAIFADDR_IN6 value at byte 2: rust: 32 (0x20) != c 128 (0x80)
bad SIOCDIFADDR_IN6 value at byte 3: rust: 128 (0x80) != c 129 (0x81)
bad SIOCSIFBRDADDR value at byte 3: rust: 192 (0xc0) != c 128 (0x80)
bad SIOCSIFFLAGS value at byte 3: rust: 192 (0xc0) != c 128 (0x80)
bad SIOCAIFADDR value at byte 2: rust: 32 (0x20) != c 64 (0x40)
bad SIOCIFCREATE value at byte 3: rust: 192 (0xc0) != c 128 (0x80)

[nathaniel-bennett]

Resolves #3626

[semarie]

thanks. still some fixes needed.

[tgross35]

@semarie you may want to put up a proposal at some point in rust-lang/rust to promote one of the OpenBSD targets to Tier2 if there is sufficient demand, not sure if that has been brought up before. This would let us start testing it in CI here.

[semarie]

LGTM for OpenBSD. thanks !

[nathaniel-bennett]

@rustbot label stable-nominated

[nathaniel-bennett]

Looks like this has been approved by semarie, just needs to be merged @tgross35

[tgross35]

This is labeled S-waiting-on-review so it is already in my queue. I am just trying to get the branch branches better in sync and fix some testing things before I merge more new features (and this is a bigger-ish change, anything where I need to dig through multiple platforms' headers to cross check takes forever. If you have links to headers or docs that helps a ton!)

[nathaniel-bennett]

Here are all the applicable header files for this PR:

Header file for MacOS SIO* const definitions:
https://github.com/apple-open-source/macos/blob/47164d22c8d9bbf590e605d0a77fcae4fd35bea0/xnu/bsd/sys/sockio.h

Header file for MacOS BIO* const, bpf_* struct definitions:
https://github.com/apple-open-source/macos/blob/47164d22c8d9bbf590e605d0a77fcae4fd35bea0/xnu/bsd/net/bpf.h#L170

Header file for MacOS RTA_*/RTAX_* definitions:
https://github.com/apple-open-source/macos/blob/47164d22c8d9bbf590e605d0a77fcae4fd35bea0/xnu/bsd/net/route.h#L238

Header file for MacOS SIO*_IN6 const definitions:
https://github.com/apple-open-source/macos/blob/47164d22c8d9bbf590e605d0a77fcae4fd35bea0/xnu/bsd/netinet6/in6_var.h#L588

Header file for MacOS u_int typedef:
https://github.com/apple-open-source/macos/blob/47164d22c8d9bbf590e605d0a77fcae4fd35bea0/xnu/bsd/sys/_types/_u_int.h#L28

Header file for DragonFly BIO* const, bpf_* struct definitions:
https://github.com/DragonFlyBSD/DragonFlyBSD/blob/83e7061fc08c2bcaeaaa75ad86aff4605a2904ea/sys/net/bpf.h#L104

Header file for DragonFly RTA_*/RTAX_* const definitions:
https://github.com/DragonFlyBSD/DragonFlyBSD/blob/83e7061fc08c2bcaeaaa75ad86aff4605a2904ea/sys/net/route.h#L277

Header file for DragonFly SIO* const definitions:
https://github.com/DragonFlyBSD/DragonFlyBSD/blob/83e7061fc08c2bcaeaaa75ad86aff4605a2904ea/sys/sys/sockio.h#L39

Header file for DragonFly SIO*_IN6 const definitions:
https://github.com/DragonFlyBSD/DragonFlyBSD/blob/83e7061fc08c2bcaeaaa75ad86aff4605a2904ea/sys/netinet6/in6_var.h#L406

Header file for FreeBSD BIO* const, bpf_* struct definitions:
https://github.com/freebsd/freebsd-src/blob/2b7f2890a812eb09dccaa8069483566a3b292338/sys/net/bpf.h#L120

Header file for FreeBSD RTA_*/RTAX_* const definitions:
https://github.com/freebsd/freebsd-src/blob/2b7f2890a812eb09dccaa8069483566a3b292338/sys/net/route.h#L318

Header file for FreeBSD SIO* const definitions:
https://github.com/freebsd/freebsd-src/blob/2b7f2890a812eb09dccaa8069483566a3b292338/sys/sys/sockio.h#L70

Header file for FreeBSD SIO*_IN6 const definitions:
https://github.com/openbsd/src/blob/202e2461a0d9a8e3abe70503423141a09ea1c4f4/sys/netinet6/in6_var.h#L272

Header file for OpenBSD BIO* const, bpf_* struct definitions:
https://github.com/openbsd/src/blob/202e2461a0d9a8e3abe70503423141a09ea1c4f4/sys/net/bpf.h#L114

Header file for OpenBSD RTA_*/RTAX_* const definitions:
https://github.com/openbsd/src/blob/202e2461a0d9a8e3abe70503423141a09ea1c4f4/sys/net/route.h#L310

Header file for OpenBSD SIO* const definitions:
https://github.com/openbsd/src/blob/202e2461a0d9a8e3abe70503423141a09ea1c4f4/sys/sys/sockio.h#L41

Header file for OpenBSD SIO*_IN6 const definitions:
https://github.com/openbsd/src/blob/202e2461a0d9a8e3abe70503423141a09ea1c4f4/sys/netinet6/in6_var.h#L272

Header file for NetBSD BIO* const, bpf_* struct definitions:
https://github.com/NetBSD/src/blob/c973030f42bbf6ada20cd8850b840349a4971a75/sys/net/bpf.h#L109

Header file for NetBSD RTA_*/RTAX_* const definitions:
https://github.com/NetBSD/src/blob/c973030f42bbf6ada20cd8850b840349a4971a75/sys/net/route.h#L325

Header files for NetBSD SIO* const definitions:
https://github.com/NetBSD/src/blob/c973030f42bbf6ada20cd8850b840349a4971a75/sys/sys/sockio.h#L128

Header files for NetBSD SIO*_IN6 const definitions:
https://github.com/NetBSD/src/blob/c973030f42bbf6ada20cd8850b840349a4971a75/sys/netinet6/in6_var.h#L383

Compiling these has made me realize I put a lot more into this PR than I initially thought (scope creep from adding MacOS-only definitions to including all BSD variants)--sorry about the premature ping! This should definitely take some time to review.

[nathaniel-bennett]

I've converted this to a draft as I discovered that different flavors of BSD have differing sizes for ifreq and similar structs. A portion of the value of ioctl codes are meant to convey the size of the struct they are passing, so those won't work. I found this out after setting up CI for OpenBSD/NetBSD/DragonFlyBSD on a Rust library I'm writing.

I'll eventually get around to adding the _IOC, _IOW and _IOWR macros as constant functions in this PR, and then defining the values of IOCTL keys based on that.