You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: message.go
    path of file: ./repos/go-in-5-minutes/episode7/vendor/golang.org/x/net/route
    
    the code of the file until where you have to start completion: // Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code
    
func ParseRIB(typ RIBType, b []byte) ([]Message, error) {
	if !typ.parseable() {
		return nil, errUnsupportedMessage
	}
	var msgs []Message
	nmsgs, nskips := 0, 0
	for len(b) > 4 {
		nmsgs++
		l := int(nativeEndian.Uint16(b[:2]))
		if l == 0 {
			return nil, errInvalidMessage
		}
		if len(b) < l {
			return nil, errMessageTooShort
		}
		if b[2] != sysRTM_VERSION {
			b = b[l:]
			continue
		}
		if w, ok := wireFormats[int(b[3])]; !ok {
			nskips++
		} else {
			m, err := w.parse(typ, b)
			if err != nil {
				return nil, err
			}
			if m == nil {
				nskips++
			} else {
				msgs = append(msgs, m)
			}
		}
		b = b[l:]
	}
	// We failed to parse any of the messages - version mismatch?
	if nmsgs != len(msgs)+nskips {
		return nil, errMessageMismatch
	}
	return msgs, nil
}