Use airplay to send images

Original article: http://livevision.us/wordpress/2011/02/16/airplay-without-private-api/

Without the efforts of Erica Sadun and the emergence of similar tools such as airplayer, airflick, airpdf, and airsay, I may not have the idea of trying it out. In this article, I will demonstrate creating an iOS app (camthis) to send images to Apple TV, neither using any private API nor jailbreak. I did not submit it to the Apple store, but I will always offer it if there are any new messages.

Update: camthis is currently accepted by Apple.

Required tools:

• Airplayer (written by Erica Sadun)

The airplayer download link in this link has been deleted, the reader can download: http://download.cnet.com/AirPlayer/3001-13632_4-75330532.html? SPI = cc4808989275f217e583547fa2bef669

• Bonjour Browser
• Packet peeper
• Asihttprequest framework
• IOS test app

Run airplayer:

• In this article, we will adopt a trick similar to spoofing to sniff Apple TV's network communication... download and run airplayer.

Note: airplayer is unavailable. Use other similar software.

• Airplayer uses broadcast _ ariplay. _ TCP messages and bonjour discovers them to disguise them as Apple TV. Therefore, your Mac can be regarded as an Apple TV.
• When airplayer is running, iOS devices in the same network can push images to airplayer.

Run bonjour Browser:(Download)

• Bonjour browser is an outstanding Mac application that discovers all bonjour devices on the network.
• We only use bonjour browser to find the IP address of Apple TV (airplayer), so I won't tell you how to write an iOS bonjour application.

Once the IP address is obtained, write down the address + port (in the middle, the IP address and port of AppleTV I simulated on Mac Are 192.168.1.102: 7000 ).

Bonjourbrowser

Use packet peeper to sniff the network package sent by the IOS airplay device:

• Packet peeper is an open-source tool for sniffing network packets sent/received on Mac
• It supports tcpdump filters. We will use it to filter network packets so that we can focus on Apple TV's network packets.
• When you start a session, you can set a filter similar to "TCP port 7000 ".

Select an airplayer image:

• If everything goes well, you will see an airplay flag in the upper right corner of the photo app.

Press airplay. We can see that a large number of network packages are monitored in packet peeper.

• Once the Network Package is monitored, you can select all network packages in the session and select "View menu-> View TCP stream". The result is similar.

Packetpeeper results

• Do you see the session on the left? It was the first request sent from the device to AppleTV to exchange Client/Server relationships. This is what we know about reversehttp -- that's right. In fact, it has already been included in the draft RFC.
• In order to enable my iPhone app to initialize and process reversehttp, I had a headache for several hours-but you don't have to worry about it. You just need to care about something like/Server-Info and/photo.

Sample Code:

• OK. Now that you have all the requirements, you can send an image to AppleTV.
• Assume that the asihttprequest framework is used. If you are not familiar with it, refer to here.
• This is code (simple, isn't it ?)

-(Void) senduiimage {

Uiimage * IMG = [uiimageimagenamed: @ "test.png"];

Nsdata * Data = uiimagejpegrepresentation (IMG, 1.0 );

Nsmutabledata * mdata = [[nsmutabledata alloc] initwithdata: Data] autorelease];

 

Nslog (@ "put photo ...");

Nsurl * url = [nsurlurlwithstring: @ "http: // 192.168.2.32: 7000/photo"];

Request = [asihttprequest requestwithurl: url];

[Request setrequestmethod: @ "put"];

[Requestaddrequestheader: @ "User-Agent" value: @ "mediacontrol/1.0"];

[Request setpostbody: mdata];

[Requestsetshouldattemptpersistentconnection: Yes];

[Request startsynchronous];

Nserror * error = [Request Error];

If (! Error ){

Nslog (@ "success ");

} Else {

Nslog (@ "% @", [errorlocalizeddescription]);

}

}