75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
package ipp
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import (
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"bufio"
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"encoding/binary"
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log "github.com/sirupsen/logrus"
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)
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// Currently the collection data is just consumed and dropped from the bytestream
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func consumeCollection(byteStream *bufio.Reader) {
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// RFC8010 Section 3.1.6
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var length uint16
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binary.Read(byteStream, binary.BigEndian, &length)
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collectionName := make([]byte, length)
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if length > 0 {
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binary.Read(byteStream, binary.BigEndian, collectionName)
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}
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log.Info("collection name " + string(collectionName))
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err := binary.Read(byteStream, binary.BigEndian, &length) //Always zero ??
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if err != nil {
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log.Fatal("error ", err.Error())
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}
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if length != 0 {
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log.Fatal("Should be zero")
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}
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// Member attributes
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done:
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for {
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var t tag
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binary.Read(byteStream, binary.BigEndian, &t)
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log.Debug("Collection tag ", t)
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switch t {
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case endCollectionValueTag:
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binary.Read(byteStream, binary.BigEndian, &length)
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if length != 0 {
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log.Fatal("Should be zero")
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}
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binary.Read(byteStream, binary.BigEndian, &length)
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if length != 0 {
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log.Fatal("Should be zero")
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}
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case memberAttrNameValueTag:
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// RFC8010 Section 3.7.1
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binary.Read(byteStream, binary.BigEndian, &length) //Always zero ??
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if length != 0 {
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log.Fatal("Should be zero")
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}
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binary.Read(byteStream, binary.BigEndian, &length) // Value length
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memberName := make([]byte, length)
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binary.Read(byteStream, binary.BigEndian, memberName)
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log.Debugf("Member name: %v", string(memberName))
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var memberValueTag tag
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binary.Read(byteStream, binary.BigEndian, &memberValueTag)
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log.Debug("Member value tag: ", memberValueTag)
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binary.Read(byteStream, binary.BigEndian, &length) //Always zero ??
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if length != 0 {
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log.Fatal("Should be zero")
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}
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var memberValueLength uint16
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binary.Read(byteStream, binary.BigEndian, &memberValueLength)
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memberValue := make([]byte, memberValueLength)
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binary.Read(byteStream, binary.BigEndian, memberValue)
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log.Debugf("Member Value: % x", memberValue)
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default:
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// Next tag is one that can not be handled in the collection
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// Put it back in the byte stream and return to main loop
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byteStream.UnreadByte()
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break done
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}
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}
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log.Debug("Collection done")
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}
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