1 files changed, 0 insertions, 117 deletions
diff --git a/vendor/github.com/miekg/dns/msg_truncate.go b/vendor/github.com/miekg/dns/msg_truncate.go
deleted file mode 100644
index 2ddc9a7da..000000000
--- a/vendor/github.com/miekg/dns/msg_truncate.go
+++ /dev/null
@@ -1,117 +0,0 @@
-package dns
-
-// Truncate ensures the reply message will fit into the requested buffer
-// size by removing records that exceed the requested size.
-//
-// It will first check if the reply fits without compression and then with
-// compression. If it won't fit with compression, Truncate then walks the
-// record adding as many records as possible without exceeding the
-// requested buffer size.
-//
-// If the message fits within the requested size without compression,
-// Truncate will set the message's Compress attribute to false. It is
-// the caller's responsibility to set it back to true if they wish to
-// compress the payload regardless of size.
-//
-// The TC bit will be set if any records were excluded from the message.
-// If the TC bit is already set on the message it will be retained.
-// TC indicates that the client should retry over TCP.
-//
-// According to RFC 2181, the TC bit should only be set if not all of the
-// "required" RRs can be included in the response. Unfortunately, we have
-// no way of knowing which RRs are required so we set the TC bit if any RR
-// had to be omitted from the response.
-//
-// The appropriate buffer size can be retrieved from the requests OPT
-// record, if present, and is transport specific otherwise. dns.MinMsgSize
-// should be used for UDP requests without an OPT record, and
-// dns.MaxMsgSize for TCP requests without an OPT record.
-func (dns *Msg) Truncate(size int) {
-	if dns.IsTsig() != nil {
-		// To simplify this implementation, we don't perform
-		// truncation on responses with a TSIG record.
-		return
-	}
-
-	// RFC 6891 mandates that the payload size in an OPT record
-	// less than 512 (MinMsgSize) bytes must be treated as equal to 512 bytes.
-	//
-	// For ease of use, we impose that restriction here.
-	if size < MinMsgSize {
-		size = MinMsgSize
-	}
-
-	l := msgLenWithCompressionMap(dns, nil) // uncompressed length
-	if l <= size {
-		// Don't waste effort compressing this message.
-		dns.Compress = false
-		return
-	}
-
-	dns.Compress = true
-
-	edns0 := dns.popEdns0()
-	if edns0 != nil {
-		// Account for the OPT record that gets added at the end,
-		// by subtracting that length from our budget.
-		//
-		// The EDNS(0) OPT record must have the root domain and
-		// it's length is thus unaffected by compression.
-		size -= Len(edns0)
-	}
-
-	compression := make(map[string]struct{})
-
-	l = headerSize
-	for _, r := range dns.Question {
-		l += r.len(l, compression)
-	}
-
-	var numAnswer int
-	if l < size {
-		l, numAnswer = truncateLoop(dns.Answer, size, l, compression)
-	}
-
-	var numNS int
-	if l < size {
-		l, numNS = truncateLoop(dns.Ns, size, l, compression)
-	}
-
-	var numExtra int
-	if l < size {
-		_, numExtra = truncateLoop(dns.Extra, size, l, compression)
-	}
-
-	// See the function documentation for when we set this.
-	dns.Truncated = dns.Truncated || len(dns.Answer) > numAnswer ||
-		len(dns.Ns) > numNS || len(dns.Extra) > numExtra
-
-	dns.Answer = dns.Answer[:numAnswer]
-	dns.Ns = dns.Ns[:numNS]
-	dns.Extra = dns.Extra[:numExtra]
-
-	if edns0 != nil {
-		// Add the OPT record back onto the additional section.
-		dns.Extra = append(dns.Extra, edns0)
-	}
-}
-
-func truncateLoop(rrs []RR, size, l int, compression map[string]struct{}) (int, int) {
-	for i, r := range rrs {
-		if r == nil {
-			continue
-		}
-
-		l += r.len(l, compression)
-		if l > size {
-			// Return size, rather than l prior to this record,
-			// to prevent any further records being added.
-			return size, i
-		}
-		if l == size {
-			return l, i + 1
-		}
-	}
-
-	return l, len(rrs)
-}