> From: openssl-users <openssl-users-bounces@xxxxxxxxxxx> On Behalf Of Matt > Caswell > Sent: Monday, 21 March, 2022 05:33 > > Given that OpenSSL already supports IPv6 but we've never needed to > include [netinet/ip6.h], I am wondering what is in that header that needs to > be used? netinet/ip6.h is for the "Advanced API for IPv6", detailed in RFC 3542. It's typically used for raw-socket access to IPv6, for things like traceroute and hop-by-hop. The RFC specifically mentions using this API to retrieve and set addresses, so it seems like a fix for issue 5257 does need to use it, if that's to be done in a portable way. 3542 is only Informational, but I'd expect most or all platforms with IPv6 support to conform to it. -- Michael Wojcik
