With GCC9, GNAT.Sockets includes support for IPv6. Sockaddr is an Unchecked_Union, which now includes IPv6 fields, bringing the total possible size to 28 bytes. The code in Bind_Socket currently calculates the length of the struct sockaddr to be passed to bind(2) as this size, which (at any rate on Darwin x86_64) results in failure (EINVAL).
This patch provides the required length explicitly from the socket's family.
Tested by rebuilding the compiler with --disable-bootstrap and re-running the
reproducer.
gcc/ada/Changelog:
2019-03-04 Simon Wright <si...@pushface.org>
PR ada/89583
* libgnat/g-socket.adb (Bind_Socket): Calculate Len (the significant
length of
the Sockaddr) using the Family of the Address parameter.
pr89583.diff
Description: Binary data
