From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/4836 Path: news.gmane.org!not-for-mail From: Natanael Copa Newsgroups: gmane.linux.lib.musl.general Subject: Re: if_nameindex/getifaddrs and dhcpcd issue Date: Tue, 8 Apr 2014 16:27:36 +0200 Message-ID: <20140408162736.2dd77dfa@ncopa-desktop.alpinelinux.org> References: <20140408111147.5f79729f@ncopa-desktop.alpinelinux.org> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1396967279 28809 80.91.229.3 (8 Apr 2014 14:27:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 8 Apr 2014 14:27:59 +0000 (UTC) Cc: justin@specialbusservice.com To: musl@lists.openwall.com Original-X-From: musl-return-4840-gllmg-musl=m.gmane.org@lists.openwall.com Tue Apr 08 16:27:53 2014 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1WXX0C-0003u9-DK for gllmg-musl@plane.gmane.org; Tue, 08 Apr 2014 16:27:52 +0200 Original-Received: (qmail 3416 invoked by uid 550); 8 Apr 2014 14:27:51 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 3407 invoked from network); 8 Apr 2014 14:27:51 -0000 In-Reply-To: X-Mailer: Claws Mail 3.9.3 (GTK+ 2.24.23; x86_64-alpine-linux-uclibc) Xref: news.gmane.org gmane.linux.lib.musl.general:4836 Archived-At: On Tue, 8 Apr 2014 11:07:47 +0100 Justin Cormack wrote: > On Tue, Apr 8, 2014 at 10:11 AM, Natanael Copa wrote: > > (snip) > > I am not sure that it is appropriate that a netlink implementation, > which is the only way to do the enumeration correctly in the potential > absense of /proc, should go into Musl. I would be more inclined to > implement a new library to do netlink stuff that provides compatible > interfaces (you could use libnetlink too). The glibc implementation is > 723 lines of code, and it is probably hard to make the implementation > a lot smaller, but you could make a full netlink library in not much > more as it is complicated but uniform (I wrote a partly complete one > in 1000 lines of Lua). I believe it can be better done than what glibc does. > However I can see no reason why dhcp on a specified interface needs to > enumerate interfaces at all, and it only needs to read ipv4 addresses, > unless it is implementing dhcp6 too, maybe it does now. Again dhcp6 > needs netlink, the Musl ipv6 parts for getifaddrs already use /proc > which is definitely unreliable for early boot config in a distro in my > view. dhcpcd != dhcp. In any case, i think if_nameindex should return a list of all interfaces, not only those who have a configured ipv4 address. I also think that the way getifaddrs uses /proc for ipv6 is ugly so I'd say that both getifaddrs and if_nameindex would be better off with netlink. -nc