From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 6C13A38582A2 for ; Mon, 4 Jul 2022 19:57:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 6C13A38582A2 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-90-EM575p__PNmv1ZJGw6cyoA-1; Mon, 04 Jul 2022 15:57:14 -0400 X-MC-Unique: EM575p__PNmv1ZJGw6cyoA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AC4848001EA; Mon, 4 Jul 2022 19:57:13 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.178]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D4B7A40F9D41; Mon, 4 Jul 2022 19:57:12 +0000 (UTC) From: Florian Weimer To: Ian Pilcher Cc: Ian Pilcher via Libc-help Subject: Re: inet_net_pton() alternative for IPv6 References: <87let8681g.fsf@oldenburg.str.redhat.com> <4e18e0fd-44dd-4236-8275-22dffdbf5892@gmail.com> Date: Mon, 04 Jul 2022 21:57:11 +0200 In-Reply-To: <4e18e0fd-44dd-4236-8275-22dffdbf5892@gmail.com> (Ian Pilcher's message of "Mon, 4 Jul 2022 14:34:32 -0500") Message-ID: <87h73w6488.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-help@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-help mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Jul 2022 19:57:16 -0000 * Ian Pilcher: > On 7/4/22 13:34, Florian Weimer wrote: >> There's inet_pton, or getaddrinfo AI_NUMERICHOST if you want to produce >> a full socket address (with a port number as well). > > I just need to parse an IP address and prefix length or network address, > in CIDR format. Unfortunately, inet_pton() won't parse the address > portion of a CIDR address, so it looks like I'm going to have to make a > zero-terminated copy of that part of the address, just so I can pass it > to inet_pton(). I guess that's just living with C strings. 8-/ We have the same issue with separating IPv6 addresses from their scope IDs, and have an internal __inet_pton_length function, which is used to avoid that copy. But pretty much anything that operates on C strings could also work with an explicit length, so there's really no good reason to start exporting __inet_pton_length, I'm afraid. Thanks, Florian