Actionscript 3 - AMF decoding example

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Questions

i am trying to read some flex/amf traffic, but the lack of proper documentation / examples making it really hard.

Can someone please walk me through the decoding of the following rtmp/amf3 packet:

0x43, 0x00, 0x68, 0xcd, 0x00, 0x01, 0x33, 0x11, 0x00, 0x05, 0x00, 0x40, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x11, 0x0a, 0x81, 0x13, 0x4f, 0x66, 0x6c, 0x65, 0x78, 0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x69, 0x6e, 0x67, 0x2e, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x2e, 0x52, 0x65, 0x6d, 0x6f, 0x74, 0x69, 0x6e, 0x67, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x0d, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x13, 0x6f, 0x70, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x0f, 0x68, 0x65, 0x61, 0x64, 0x65, 0x72, 0x73, 0x17, 0x64, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x13, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x49, 0x64, 0x11, 0x63, 0x6c, 0x69, 0x65, 0x6e, 0x74, 0x49, 0x64, 0x15, 0x74, 0x69, 0x6d, 0x65, 0x54, 0x6f, 0x4c, 0x69, 0x76, 0x65, 0x13, 0x74, 0x69, 0x6d, 0x65, 0xc3, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x09, 0x62, 0x6f, 0x64, 0x79, 0x01, 0x06, 0x29, 0x6c, 0x69, 0x73, 0x74, 0x41, 0x6c, 0x6c, 0x50, 0x72, 0x61, 0x63, 0x74, 0x69, 0x63, 0x65, 0x47, 0x61, 0x6d, 0x65, 0x73, 0x0a, 0x0b, 0x01, 0x21, 0x44, 0x53, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x04, 0x3c, 0x15, 0x44, 0x53, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x06, 0x11, 0x6d, 0x79, 0x2d, 0x72, 0x74, 0x6d, 0x70, 0x73, 0x09, 0x44, 0x53, 0x49, 0x64, 0x06, 0x49, 0x42, 0x45, 0x32, 0x34, 0x31, 0x32, 0x33, 0x34, 0x2d, 0x31, 0x45, 0x31, 0x39, 0x2d, 0x30, 0x33, 0x43, 0x33, 0x2d, 0x39, 0x30, 0x34, 0x43, 0x2d, 0x32, 0x31, 0x36, 0x33, 0x36, 0x36, 0x30, 0x41, 0x42, 0x34, 0x37, 0x46, 0x01, 0x06, 0x17, 0x67, 0x61, 0x6d, 0x65, 0x53, 0x65, 0xc3, 0x72, 0x76, 0x69, 0x63, 0x65, 0x06, 0x49, 0x31, 0x34, 0x43, 0x30, 0x46, 0x42, 0x38, 0x30, 0x2d, 0x46, 0x37, 0x43, 0x34, 0x2d, 0x42, 0x42, 0x34, 0x42, 0x2d, 0x31, 0x46, 0x32, 0x34, 0x2d, 0x34, 0x39, 0x36, 0x32, 0x38, 0x30, 0x42, 0x38, 0x39, 0x33, 0x42, 0x38, 0x01, 0x04, 0x00, 0x04, 0x00, 0x09, 0x01, 0x01

My Attemps:

0x43 - 0100 0011 : [01] - type 1 = rtmp header will be 7 bytes. Stream ID - 3, will be in this single byte.

Also managed to read the following with shifting the UTF 1 bit to get the length:

0x4f: flex.messaging.messages.RemotingMessage

0x0d: source

0x13: operation

0x0f: headers

0x17: destination

0x13: messageId

0x11: clientId

0x15: timeToLive

Here my guessing stops, "time" / "stamp" does not seem to work. Of course i am failing to understand how all the other bytes are encoded (objects / arrays etc);

Answers

http://www.charlesproxy.com/documentation/additional/amf/ http://www.charlesproxy.com/documentation/additional/amf/

Source

License : cc by-sa 3.0

http://stackoverflow.com/questions/13621083/amf-decoding-example

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