Am 01.01.24 um 10:27 schrieb Gert Doering:
commit f13331005d5a7 (gerrit/454) most painfully works around the limitations
of the SIOCGIFCONF API, with struct member access on an unaligned buffer,
possibly overrunning sockaddr structures, etc. - and the result still did
not work on OpenSolaris and OpenBSD (no AF_LINK in the returned elements).
Reading through OpenBSD "ifconfig" source, I found getifaddrs(3), which
is exactly what we want here - it works on FreeBSD, NetBSD, OpenBSD and
MacOS, and all returned pointers are properly aligned, so the code gets
shorter, easier to read, and UBSAN is still happy.
OpenSolaris does have getifaddrs(3), but (surprise) it does not work, as
in "it does not return AF_LINK addresses". It does have SIOCGIFHWADDR,
instead, and "man if_tcp" claims "should behave in a manner compatible
with Linux" - so TARGET_SOLARIS gets a copy of the Linux code now (works).
- if (!strncmp(ifr.ifr_name, rgi->iface, IFNAMSIZ))
Mini nitpick from clang-tidy:
Clang-Tidy: No header providing "strncmp" is directly included.
Adding string.h would could be done if we want a v2 of the patch
Tested also on macOS.
Acked-By: Arne Schwabe <a...@rfc2549.org>
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