Is UDP Broadcast possible in a Chrome App

[Simon]

Hi,

i'm trying to send a simple udp packet to the broadcast (255.255.255.255) address inside of a Chrome app. I'm able to send udp packet to a regular address(10.22.172.5), but as soon as i try a broadcast address I get "Unchecked runtime.lastError while running sockets.udp.send: net::ERR_ACCESS_DENIED". After searching for a solution it seems that broadcast is not possible with the standard chrome.sockets.udp API. Then  i tried it with the Native Client. I wrote c code and compiled it with the nacl sdk. At the end i got the same result as before. It works for regular address(10.22.172.5) but not for broadcast. Now to my question: Is it in principle possible to send a udp packet to a broadcast adress inside of a Chrome app?

[Reilly Grant]

Can you provide a minimal test application that demonstrates this failure? I need to see your application manifest and JavaScript.

On Thu, Mar 12, 2015 at 6:46 AM Simon <seidel....@googlemail.com> wrote:

Hi,

i'm trying to send a simple udp packet to the broadcast (255.255.255.255) address inside of a Chrome app. I'm able to send udp packet to a regular address(10.22.172.5), but as soon as i try a broadcast address I get "Unchecked runtime.lastError while running sockets.udp.send: net::ERR_ACCESS_DENIED". After searching for a solution it seems that broadcast is not possible with the standard chrome.sockets.udp API. Then  i tried it with the Native Client. I wrote c code and compiled it with the nacl sdk. At the end i got the same result as before. It works for regular address(10.22.172.5) but not for broadcast. Now to my question: Is it in principle possible to send a udp packet to a broadcast adress inside of a Chrome app?

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[Simon]

Here you have my background.js and my manifest.json file. Thanks for your help

[jdz]

I have exactly the same issue. Does anyone know if it is even possible to do a broadcast from a chrome app?

[Reilly Grant]

Chrome currently does not open broadcast-capable sockets (SO_BROADCAST is not set when the socket is created). I will look into whether or not it will be possible to enable this.

On Thu, Mar 26, 2015 at 11:20 AM jdz <dzth...@gmail.com> wrote:

I have exactly the same issue. Does anyone know if it is even possible to do a broadcast from a chrome app?

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[Joseph Dziezanowski]

Thanks for the reply. Our application requires broadcast to discover our embedded devices on a network. We had been planning all along to use a chrome app to do the discovery - it never occurred to us that this might not work. Any definitive info would be much appreciated. 

Sent from my iPad

[Reilly Grant]

This is already been tracked as https://code.google.com/p/chromium/issues/detail?id=308461.

[Shih Sheen]

Hi,

I've got the same issue on my chromebook with my packaged app.

The API works fine on my Windows desktop.

How to make it work on chromebook?

Simon於 2015年3月12日星期四 UTC+8下午9時46分02秒寫道：

[Reilly Grant]

What version of Chrome OS are you running?

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[Shih Sheen]

Hi,

OS version is 43.0.2357.130

Platform 6946.63.0

I found that I can call udp.send  to 239.255.255.250 after udp.joinGroup to 239.255.255.250.(SSDP)

(Set "udp":{"bind":"*", "send":"*", "joinGroup":"*", "multicastMembership":""} in manifest)

But I still got "ERR_ACCESS_DENIED" while I'm trying to send message with udp.send to a normal IP address who response my SSDP multicast.

It's OK on Windows that just do udp.send to a IP address without joinGroup

Reilly Grant於 2015年7月1日星期三 UTC+8上午12時00分16秒寫道：