[Live-devel] live-devel Digest, Vol 157, Issue 2 - Multiple NICs
Weber, Patrick
Patrick.Weber at iecinfrared.com
Tue Dec 6 10:55:27 PST 2016
Thanks Warren. Unfortunately my scope of control ends at my application boundary. This application is video distribution of live camera feeds (surveillance system) and frequently our clients do not want us mucking around with their system settings. Clearly I *could* do what has been suggested from within my application (the top layer is C#/.NET, so the System.Web assembly has everything needed), but it would be so much nicer to just tell Live555 which NIC to use - either by IP or MAC address - instead of allowing Live555 to infer the NIC based on routing settings. But if that is my only option, then that is what I must do...
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Today's Topics:
1. Re: live-devel Digest, Vol 157, Issue 1 (Weber, Patrick)
2. Re: live-devel Digest, Vol 157, Issue 1 (Warren Young)
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Date: Mon, 5 Dec 2016 14:27:19 +0000
From: "Weber, Patrick" <Patrick.Weber at iecinfrared.com>
To: "live-devel at ns.live555.com" <live-devel at ns.live555.com>
Subject: Re: [Live-devel] live-devel Digest, Vol 157, Issue 1
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Thanks for the response. Is there a non-default way (via C++ API) to select the NIC/IP address? My application may use multicast for other purposes (Web service discovery, for example), and I need to have it active on each NIC.
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Today's Topics:
1. Multiple NIC - RTSP URL. (Weber, Patrick)
2. Re: Multiple NIC - RTSP URL. (Ross Finlayson)
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Date: Fri, 2 Dec 2016 15:43:24 +0000
From: "Weber, Patrick" <Patrick.Weber at iecinfrared.com>
To: "live-devel at lists.live555.com" <live-devel at ns.live555.com>
Subject: [Live-devel] Multiple NIC - RTSP URL.
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My application can have multiple NICs - how do I tell RTSPServer which IP address to use?
Patrick Weber
Principal Consultant
[IAC Logo][mesa_recognized_practitioner_logo - Small] Integrated Automation Consulting LLC
440-552-5937
www.IntAutomation.com<http://www.intautomation.com/>
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Message: 2
Date: Sat, 3 Dec 2016 05:25:13 +1300
From: Ross Finlayson <finlayson at live555.com>
To: LIVE555 Streaming Media - development & use
<live-devel at ns.live555.com>
Subject: Re: [Live-devel] Multiple NIC - RTSP URL.
Message-ID: <46E41433-385E-4078-9B76-72F71A112C9D at live555.com>
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> On Dec 3, 2016, at 4:43 AM, Weber, Patrick <Patrick.Weber at iecinfrared.com> wrote:
>
> My application can have multiple NICs ? how do I tell RTSPServer which IP address to use?
By default, the server uses the network interface that?s used for IP multicast routing - i.e., the one that has a route for 224.0.0.0/4. (The reason for this is that it uses IP multicast to detect its own IP address.)
So, the easiest way to choose a particular network interface is to reconfigure your host so that it uses that network interface for IP multicast routing. You should be able to do this by running (as root):
route add 224.0.0.0/4 ip-address-for-that-nic
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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Message: 2
Date: Mon, 5 Dec 2016 12:00:15 -0700
From: Warren Young <warren at etr-usa.com>
To: LIVE555 Streaming Media - development & use
<live-devel at ns.live555.com>
Subject: Re: [Live-devel] live-devel Digest, Vol 157, Issue 1
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On Dec 5, 2016, at 7:27 AM, Weber, Patrick <Patrick.Weber at iecinfrared.com> wrote:
>
> Thanks for the response. Is there a non-default way (via C++ API) to select the NIC/IP address? My application may use multicast for other purposes (Web service discovery, for example), and I need to have it active on each NIC.
These services must use different addresses, which gives you the opportunity to route them separately.
I suggest that you use the default rule Ross recommended for the ?best? interface for multicast, then add additional routes with lower metrics (see the netstat/route(8) manual page) for the exceptions.
For example, let?s say you have IPTV going out on 239.255.{0-3}.x and you wanted it to go out the 1.2.3.4 interface. Let?s further say you have the 224/4 route on the 2.3.4.5 interface with metric 10. You could then say:
route add 239.255.0.0/22 1.2.3.4 metric 9
That causes the network stack?s routing layer to prefer sending IPTV multicast packets out the 1.2.3.4 NIC while everything else goes out 2.3.4.5.
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