From owner-freebsd-current@freebsd.org Wed Feb 13 03:04:56 2019 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C7CF014E17A4 for ; Wed, 13 Feb 2019 03:04:55 +0000 (UTC) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: from pdx.rh.CN85.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id AF3756DB0E; Wed, 13 Feb 2019 03:04:54 +0000 (UTC) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: from pdx.rh.CN85.dnsmgr.net (localhost [127.0.0.1]) by pdx.rh.CN85.dnsmgr.net (8.13.3/8.13.3) with ESMTP id x1D34q0k079432; Tue, 12 Feb 2019 19:04:52 -0800 (PST) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: (from freebsd-rwg@localhost) by pdx.rh.CN85.dnsmgr.net (8.13.3/8.13.3/Submit) id x1D34qvI079431; Tue, 12 Feb 2019 19:04:52 -0800 (PST) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <201902130304.x1D34qvI079431@pdx.rh.CN85.dnsmgr.net> Subject: Re: what do jails map 127.0.0.1 to? In-Reply-To: To: Rick Macklem Date: Tue, 12 Feb 2019 19:04:52 -0800 (PST) CC: "Bjoern A. Zeeb" , "freebsd-current@FreeBSD.org" X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: AF3756DB0E X-Spamd-Bar: +++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [3.85 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; NEURAL_SPAM_SHORT(0.98)[0.984,0]; FROM_HAS_DN(0.00)[]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DMARC_NA(0.00)[dnsmgr.net]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.60)[0.604,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[cached: pdx.rh.CN85.dnsmgr.net]; NEURAL_SPAM_LONG(0.39)[0.389,0]; IP_SCORE(-0.01)[ip: (0.02), ipnet: 69.59.192.0/19(0.01), asn: 13868(-0.02), country: US(-0.07)]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:13868, ipnet:69.59.192.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_LAST(0.00)[] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Feb 2019 03:04:56 -0000 [ Charset windows-1252 unsupported, converting... ] > Bjoern A. Zeeb wrote: > [good stuff snipped] > >Yes, could do easily but wouldn?t work for my above case, would it? I > >can help you with the code for v4 and jails if you help me with the code > >for IPv6? > Well, not quite what you volunteered to do, but can you fill in the INET6 code > for this code snippet? (It does what Alan suggested for INET.) > > > /* > * Find out what IP# localhost maps to and whether or not use of > * INET6 is required. Jails will map 127.0.0.1 to another INET > * address. > */ > use_inet6 = 0; > s = socket(PF_INET, SOCK_DGRAM, 0); > if (s < 0) { > use_inet6 = 1; > s = socket(PF_INET6, SOCK_DGRAM, 0); > } > if (s < 0) > err(1, "Can't create a inet/inet6 socket"); > if (use_inet6 != 0) { > ; /* Needs code... */ > } else { > memset(&sad, 0, sizeof(sad)); > sad.sin_len = sizeof(sad); > sad.sin_family = AF_INET; > sad.sin_addr.s_addr = inet_addr("127.0.0.1"); > sad.sin_port = 0; > ret = bind(s, (struct sockaddr *)&sad, sizeof(sad)); > if (ret > 0) > err(1, "Can't bind 127.0.0.1"); > memset(&sad, 0, sizeof(sad)); > slen = sizeof(sad); > ret = getsockname(s, (struct sockaddr *)&sad, &slen); > if (ret < 0) > err(1, "Can't get bound sockaddr"); > printf("locaddr: %s\n", inet_ntoa(sad.sin_addr)); > } > > If the IPv4 code isn't sufficient, please let me know. (I think I know how to make > the RPC code use IPv6, but I need to know what IPv6 address to use. I get confused > by link local/site local/? It needs to be an address that is "this machine". ipv4 127.0.0.1 == ipv6 ::1, see /etc/hosts > > Thanks for your help with this, rick > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > > -- Rod Grimes rgrimes@freebsd.org