September 2014 - Macnetworkprog

Re: iPhone Personal Hotspot and IPv6 behavior question
by Dieter Siegmund 26 Sep '14

26 Sep '14

Hi Stéphane, This doesn't sound like expected behavior. Could you file a bug report so that we can take a closer look? As part of the information you gather, please enable IPConfiguration verbose logging: # sudo ipconfig setverbose 1 Reproduce the problem, then capture a get-mobility-info snapshot and attach it to the bug report: # /System/Library/Frameworks/SystemConfiguration.framework/Resources/get-mobility-info Thanks, Dieter > On Sep 26, 2014, at 7:44 AM, Stéphane Sudre <ssudre(a)intego.com> wrote: > > Let's say an iPhone 5s running iOS 7 is used as Personal Hotspot. > > Let's say it then provides both an IPv4 and IPv6 connections. > > Question: > --------- > > Is it considered the expected behavior that the System Configuration framework reports that the IPv6 address of the router (i.e. the iPhone) does change almost every minute? > > > When the iPhone only provides an IPv4 connection, the router address does not periodically change. > When the iPhone provides both an IPv4 and IPv6 connections, the System Configuration framework reports periodically some changes to the IPv4 connections but the IPv4 address of the router does not change. > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/macnetworkprog/dieter%40apple.com > > This email sent to dieter(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: iPhone Personal Hotspot and IPv6 behavior question
by Dieter Siegmund 26 Sep '14

26 Sep '14

Hi Stéphane, This doesn't sound like expected behavior. Could you file a bug report so that we can take a closer look? As part of the information you gather, please enable IPConfiguration verbose logging: # sudo ipconfig setverbose 1 Reproduce the problem, then capture a get-mobility-info snapshot and attach it to the bug report: # /System/Library/Frameworks/SystemConfiguration.framework/Resources/get-mobility-info Thanks, Dieter > On Sep 26, 2014, at 7:44 AM, Stéphane Sudre <ssudre(a)intego.com> wrote: > > Let's say an iPhone 5s running iOS 7 is used as Personal Hotspot. > > Let's say it then provides both an IPv4 and IPv6 connections. > > Question: > --------- > > Is it considered the expected behavior that the System Configuration framework reports that the IPv6 address of the router (i.e. the iPhone) does change almost every minute? > > > When the iPhone only provides an IPv4 connection, the router address does not periodically change. > When the iPhone provides both an IPv4 and IPv6 connections, the System Configuration framework reports periodically some changes to the IPv4 connections but the IPv4 address of the router does not change. > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/macnetworkprog/dieter%40apple.com > > This email sent to dieter(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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iPhone Personal Hotspot and IPv6 behavior question
by Stéphane Sudre 26 Sep '14

26 Sep '14

Let's say an iPhone 5s running iOS 7 is used as Personal Hotspot. Let's say it then provides both an IPv4 and IPv6 connections. Question: --------- Is it considered the expected behavior that the System Configuration framework reports that the IPv6 address of the router (i.e. the iPhone) does change almost every minute? When the iPhone only provides an IPv4 connection, the router address does not periodically change. When the iPhone provides both an IPv4 and IPv6 connections, the System Configuration framework reports periodically some changes to the IPv4 connections but the IPv4 address of the router does not change. _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Trouble connecting to NSNetService
by Quinn "The Eskimo!" 26 Sep '14

26 Sep '14

On 25 Sep 2014, at 21:34, Rick Mann <rmann(a)latencyzero.com> wrote: > On Sep 25, 2014, at 05:09 , Quinn The Eskimo! <eskimo1(a)apple.com> wrote: > >> Are you using -[NSNetService getInputStream:outputStream:] to create these streams? > > yes Interesting. Well, there are two interesting things here: A. How is this address getting into resolved services address list? > Address: 0.0.0.0:53767 B. ENOTCONN (57) is quite a strange error. Why are you getting it? >From your logging it seems that you're resolving the service before creating streams that connect to it. That's obviously useful for debugging but it should be unnecessary for the connection to go through. If you don't do the resolve, do you still fail with that error. Beyond that, I think issue A is what's important here. How did you get an A record with 0.0.0.0? I suspect your device is advertising that, in which case it needs to stop. You should look at a packet trace of the device's response to the A record query from your Mac. Does it include a 0.0.0.0 record? Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Trouble connecting to NSNetService
by Rick Mann 25 Sep '14

25 Sep '14

On Sep 25, 2014, at 05:09 , Quinn The Eskimo! <eskimo1(a)apple.com> wrote: > Are you using -[NSNetService getInputStream:outputStream:] to create these streams? yes -- Rick Mann rmann(a)latencyzero.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Trouble connecting to NSNetService
by Quinn "The Eskimo!" 25 Sep '14

25 Sep '14

On 25 Sep 2014, at 12:06, Rick Mann <rmann(a)latencyzero.com> wrote: > I am able to discover the service, but when I attempt to connect to it from a Mac (iOS Simulator) that is connected to the 192.168.1/24 network via Ethernet, I get the following in the logs: Are you using -[NSNetService getInputStream:outputStream:] to create these streams? Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Trouble connecting to NSNetService
by Rick Mann 25 Sep '14

25 Sep '14

Continuing the saga of using this net service… I have a BeagleBone Black running Debian that's using Avahi to (statically) advertise a service on port 2002. The BBB is named "balloon". It is connected via Ethernet and is hosting a Wi-Fi network named "Balloon." The Ethernet interface is on 192.168.1/24, and the Wi-Fi interface is 10.77.80/24. I am able to discover the service, but when I attempt to connect to it from a Mac (iOS Simulator) that is connected to the 192.168.1/24 network via Ethernet, I get the following in the logs: 2014-09-25 04:04:03.157 Balloon[94614:3454106] <AppDelegate.m: 123>: Found service: <NSNetService 0x7fcc2bf180d0> local. _mavlink._tcp. balloon MAVLink 2014-09-25 04:04:03.588 Balloon[94614:3454106] <AppDelegate.m: 141>: Hostname: balloon.local. 2014-09-25 04:04:03.588 Balloon[94614:3454106] <AppDelegate.m: 142>: Port: 2002 2014-09-25 04:04:03.588 Balloon[94614:3454106] <AppDelegate.m: 143>: 2 addresses 2014-09-25 04:04:03.588 Balloon[94614:3454106] <AppDelegate.m: 149>: Address: 192.168.15.59:53767 2014-09-25 04:04:03.588 Balloon[94614:3454106] <AppDelegate.m: 149>: Address: 0.0.0.0:53767 2014-09-25 04:04:03.653 Balloon[94614:3454106] <NetServiceMAVLink.m: 64>: An error occured on stream <__NSCFInputStream: 0x7fcc2bc44130>: Error Domain=NSPOSIXErrorDomain Code=57 "The operation couldn’t be completed. Socket is not connected" 2014-09-25 04:04:03.660 Balloon[94614:3454106] <NetServiceMAVLink.m: 64>: An error occured on stream <__NSCFOutputStream: 0x7fcc2bc412c0>: Error Domain=NSPOSIXErrorDomain Code=57 "The operation couldn’t be completed. Socket is not connected" Sometimes I get a "stream opened" event before the error events. But, if I open a terminal window and type: $ $ nc balloon.local 2002 It connects just fine and the terminal starts to fill with the data being sent from the BBB on that port. If instead I run the code on an iPad connected to the Balloon Wi-Fi network, it connects and gets the data. Any ideas what's going on? Thanks! -- Rick Mann rmann(a)latencyzero.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Questions about NSNetService
by Quinn "The Eskimo!" 25 Sep '14

25 Sep '14

On 24 Sep 2014, at 18:58, Rick Mann <rmann(a)latencyzero.com> wrote: > Thanks, Quinn, I'll take a look, and do all the other things. I'm only using the BSD API because the addresses property returns me a bunch of sockaddr structs. Right. And it's fine to use a BSD calls to deal with IP address strings, you just have to use calls that were invented this millennium (-: > Also, what would it take to get the list server message archive page to wrap the text? You should file a bug about that. <https://developer.apple.com/bug-reporting/> Please post your bug number, just for the record. Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Questions about NSNetService
by Rick Mann 24 Sep '14

24 Sep '14

On Sep 24, 2014, at 04:33 , Quinn The Eskimo! <eskimo1(a)apple.com> wrote: > That is a simple answer with a complex question. See the following. > > <http://lists.apple.com/archives/ipv6-dev/2011/Jul/msg00009.html> Thanks, Quinn, I'll take a look, and do all the other things. I'm only using the BSD API because the addresses property returns me a bunch of sockaddr structs. Also, what would it take to get the list server message archive page to wrap the text? -- Rick Mann rmann(a)latencyzero.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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Re: Questions about NSNetService
by Quinn "The Eskimo!" 24 Sep '14

24 Sep '14

On 24 Sep 2014, at 12:17, Rick Mann <rmann(a)latencyzero.com> wrote: > Well, I didn't. I used this code: > > const char* ipCS = inet_ntoa(addr->sin_addr); Oh boy, BSD's broken name translation APIs strike again. In my experience there are only two BSD name translation APIs that are fit for purpose, <x-man-page://3/getaddrinfo> and <x-man-page://3/getnameinfo>, and even those should only be used for IP numbers (via the AI_NUMERICHOST and NI_NUMERICHOST flags). Everything else is just fundamentally broken. Oh, and just for the record, here's my Rules of DNS: 1. If you're connecting to a name, use a connect-by-name API. The post I reference below explains why that's important. 2. If you're connecting to a name at a layer that doesn't support a connect-by-name API (like BSD), you have two options: o use a socket stream (NSStream or CFStream) to do the connect-by-name and then extract the connected socket from the stream o use getaddrinfo and then write a lot of extra code to connect to each service in order until you find one that works (and you still won't be as good as the system's connect-by-name infrastructure)-: 3. If you're doing name-to-address (without connecting) or address-to-name translation, use CFHost. 4. If you're working with IPv{4,6} addresses, getaddrinfo and getnameinfo are fine, as long as you use them in numeric mode. 5. For anything else, use DNSServiceQueryRecord. > The first address is correct, so its port must be correct, right? I'm not really up for re-interpreting a sockaddr_in6 as a sockaddr_in today. I recommend you change your code to call getnameinfo. The SimplePing sample code shows how. <https://developer.apple.com/library/mac/#samplecode/SimplePing/> Once you've got accurate info please repost and we can take a look. > And finally, when I call -getInputStream:outputStream:, what address is it using to connect? That is a simple answer with a complex question. See the following. <http://lists.apple.com/archives/ipv6-dev/2011/Jul/msg00009.html> Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40list… This email sent to site_archiver(a)lists.apple.com

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