Date: Mon, 3 Aug 2020 11:15:54 +0300 From: Dmitry Samersoff <dms@...ersoff.net> To: musl@...ts.openwall.com, Rich Felker <dalias@...c.org> Subject: Re: getaddrinfo(3) with AI_V4MAPPED and AI_ALL flags Hello Rich, If you bind to ::ffff:0.0.0.0 on an IPv6 socket you will be able to receive IPv4 connection only. If you bind to :: on an IPv6 socket you will be able to receive both, IPv6 and IPv4 connections. So, on my opinion, if ::ffff:0.0.0.0 is the only IPv4 address on the interface it should not be returned. -Dmitry On 31.07.2020 22:19, Rich Felker wrote: > On Fri, Jul 31, 2020 at 07:21:47PM +0300, Dmitry Samersoff wrote: >> Hello Rich, >> >> I'm not sure that mapping of INADDR_ANY (0.0.0.0) and return of >> ::ffff:0.0.0.0' has any sense. >> >> Should it be filtered out on musl level? > > This is an interesting question. What happens if you bind > ::ffff:0.0.0.0 on an IPv6 socket? Is it the same as binding :: or does > it produce a v6 socket that only accepts v4 connections? If it has its > own distinct functionality then returning it when V4MAPPED is > requested seems to make some sense. > > Rich >
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.