Date: Wed, 13 Feb 2019 02:50:04 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: "Bjoern A. Zeeb" <bz@FreeBSD.org> Cc: "freebsd-current@FreeBSD.org" <freebsd-current@FreeBSD.org> Subject: Re: what do jails map 127.0.0.1 to? Message-ID: <QB1PR01MB353764CC569FA17BC08B5A2FDD660@QB1PR01MB3537.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <2F884512-F6A4-4E37-8566-46985A9FC5E3@FreeBSD.org> References: <QB1PR01MB3537028815A3502AA6BC4B9BDD640@QB1PR01MB3537.CANPRD01.PROD.OUTLOOK.COM>, <2F884512-F6A4-4E37-8566-46985A9FC5E3@FreeBSD.org>
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Bjoern A. Zeeb wrote: [good stuff snipped] >Yes, could do easily but wouldn=92t 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 c= ode 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 =3D 0; s =3D socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { use_inet6 =3D 1; s =3D socket(PF_INET6, SOCK_DGRAM, 0); } if (s < 0) err(1, "Can't create a inet/inet6 socket"); if (use_inet6 !=3D 0) { ; /* Needs code... */ } else { memset(&sad, 0, sizeof(sad)); sad.sin_len =3D sizeof(sad); sad.sin_family =3D AF_INET; sad.sin_addr.s_addr =3D inet_addr("127.0.0.1"); sad.sin_port =3D 0; ret =3D 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 =3D sizeof(sad); ret =3D 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 c= onfused by link local/site local/=85 It needs to be an address that is "this machin= e". Thanks for your help with this, rick
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