June 2005 - Darwin-dev - lists.apple.com

Re: ICMP Router Discovery
by Chase 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I thought that's what you said you wanted, maybe I was mistaken. From my machine: default 172.31.128.254 UGSc 3 103 en0 172.31.192/19 172.31.128.254 UGSc 2 4 en0 The 172.31.192/19 certainly is not a default route. Do you need host routes too? You can still look for them with netstat. Like I said, the netstat tool, and its source code are your friend ;) route add default 192.168.0.250 Thanks. - Chase _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Actually, it should show you all the gateways, not just the default route: G RTF_GATEWAY Destination requires forwarding by intermediary Drew I've tried this in the past and I tried again just now. It only shows the default router address. There is absolutely no mention of the other router ip address in the netstat output. By the way: I just accidentally deleted all my routes and lost internet connectivity by running "route flush". The only thing I could think of to do was: ...which seems to have worked. Would a reboot have fixed that problem, since the routing table is adjusted dynamically? If not, what's the recommended way to get the defaults back to normal again? Is "route add default <router_ip>" an incomplete fix in any way? This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Andrew Gallatin 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Chase writes: > > > netstat -rn | grep G > > nope. this just shows me the address of the default router. > > i need them all. Actually, it should show you all the gateways, not just the default route: G RTF_GATEWAY Destination requires forwarding by intermediary I thought that's what you said you wanted, maybe I was mistaken. From my machine: default 172.31.128.254 UGSc 3 103 en0 172.31.192/19 172.31.128.254 UGSc 2 4 en0 The 172.31.192/19 certainly is not a default route. Do you need host routes too? You can still look for them with netstat. Like I said, the netstat tool, and its source code are your friend ;) Drew _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Justin C. Walker 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 28, 2005, at 09:58 , Chase wrote: On Jun 28, 2005, at 11:24 AM, Ian Stewart wrote: Not sure why you thought this was required. If this is RFC 1256, then it is used in an HA config to find other routers. Your assumption may not be valid... What are you trying to achieve? Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- "Weaseling out of things is what separates us from the animals. Well, except the weasel." - Homer J Simpson -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Non of my Cisco, or firewalls (PIX and Check point) have this turned on. For us we use VIPs and VRRP but do not use ICMP discovery. Maybe we should look at it. That's good to know. I was assuming ICMP Router Discovery was the only way routes are dynamically managed. Thanks. My application simply needs to know the addresses of **all** of the routers attached to the computer's various networking interfaces. You may not be able to achieve this without manual intervention. Depending on your network, routers may identify one another by some routing protocol to which you are not privy; or may be manually configured, and the information passed to individual workstations by that same manual configuration (the admin tells you; you configure your workstation with emacs...). What is the simplest way to get that exact same information? This information is kept in the "dynamic store" managed by the SystemConfiguration framework. This information is placed into the store during startup or update by the framework, either from on-disk data (manual configuration) or by the system as it syncs up with (say) DHCP servers that have that data. Note that this doesn't give you "all the nearby routers", only those routers that have been identified to you by some sort of admin setup (either directly, or via something like DHCP). You can get the same information using the SystemConfiguration framework and parsing the content. I don't know how much doc is available for this framework, but, as a start, check Apple's developer website. You can also look at the source for 'scutil' (darwin source on the developer site), or Jeffrey Frey's 'ncutil': <http://deaddog.duch.udel.edu/~frey/darwin/ncutil> In general, the IPv4 router infrastructure is not all that dynamic (from the workstation's viewpoint). It works better (in theory) with IPv6. This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Chase 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com nope. this just shows me the address of the default router. i need them all. - chase _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… netstat -rn | grep G This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Andrew Gallatin 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Chase writes: > > When I look at the TCP/IP section for Built-in Ethernet, I see > "Router: 192.168.1.250". > > > What is the simplest way to get that exact same information? > netstat -rn | grep G Eg, look at the routing table for entries with RTF_GATEWAY set. If you need to do this in C, take a look at the netstat program in the darwin sources. Drew _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Chase 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 28, 2005, at 11:24 AM, Ian Stewart wrote: Not sure why you thought this was required. If this is RFC 1256, then it is used in an HA config to find other routers. Maybe we should look at it. What is the simplest way to get that exact same information? That's all I want. - Chase _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Non of my Cisco, or firewalls (PIX and Check point) have this turned on. For us we use VIPs and VRRP but do not use ICMP discovery. That's good to know. I was assuming ICMP Router Discovery was the only way routes are dynamically managed. Thanks. Before I travel too far down this tangent (and drag you all with me), let me go back to the simple goal I'm trying to achieve: My application simply needs to know the addresses of **all** of the routers attached to the computer's various networking interfaces. For example, on my ibook, I have an airport connection to one router (192.168.0.250) and a cat5 connection to another router (192.168.1.250). When I open system prefs, click "Network", and look at the TCP/IP section of Airport, I see "Router: 192.168.0.250". When I look at the TCP/IP section for Built-in Ethernet, I see "Router: 192.168.1.250". This email sent to site_archiver(a)lists.apple.com

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Re: we were opensource, once
by Jason Townsend 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com http://www.opendarwin.org/~jtownsend/buildingopenldap.html -Jason _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Jun 27, 2005, at 9:46 AM, Michael L Torrie wrote: Of course, the source code to the pieces like OpenLDAP is available on the opendarwin site as well as Apple's site. However, though the source code is available, it is not buildable. There are developer-only dependencies (header files, special frameworks for building) that are difficult (if only because I have no idea how to obtain them) for us mere users to get a hold of. I would have been perfectly willing to dive into the code and try to identify the problems I had and help Apple fix them, but I was unable to do this. While I agree the build process is not easy at the moment, it is possible to build using components from Darwin. I've posted instructions on how to build the Darwin version of OpenLDAP here (for both 10.4.x and 10.3.x versions). This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Ian Stewart 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Not sure why you thought this was required. If this is RFC 1256, then it is used in an HA config to find other routers. Non of my Cisco, or firewalls (PIX and Check point) have this turned on. For us we use VIPs and VRRP but do not use ICMP discovery. Maybe we should look at it. Ian On Jun 28, 2005, at 9:13 AM, Chase wrote: Works fine for me (try pinging something, as a test). whoa. you're right. catches the ping activity just fine. - chase _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/ian%40nyro.com This email sent to ian(a)nyro.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… why would the router not be sending advertisements? it's a requirement for routers, as i understand it. This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Justin C. Walker 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 28, 2005, at 09:13 , Chase wrote: Works fine for me (try pinging something, as a test). whoa. you're right. catches the ping activity just fine. Did you verify that you aren't seeing advertisements? Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- When LuteFisk is outlawed, Only outlaws will have LuteFisk -------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… why would the router not be sending advertisements? it's a requirement for routers, as i understand it. For that, you will have to check with either the router manufacturer or the admin of the network wherein it lives :-} This email sent to site_archiver(a)lists.apple.com

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Re: ICMP Router Discovery
by Chase 28 Jun '05

28 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com whoa. you're right. catches the ping activity just fine. - chase _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Works fine for me (try pinging something, as a test). why would the router not be sending advertisements? it's a requirement for routers, as i understand it. This email sent to site_archiver(a)lists.apple.com

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