From: Matt Joiner <anacrolix@gmail.com>
Date: Sun, 24 Aug 2014 19:25:52 +0000 (+1000)
Subject: Use CopyExact when extracting handshake read
X-Git-Tag: v1.0.0~1603
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=8f89d7a07ed82ed441125e7f989551d099eba5f4;p=btrtrc.git

Use CopyExact when extracting handshake read
---

diff --git a/client.go b/client.go
index 0999d6da..a513a0ae 100644
--- a/client.go
+++ b/client.go
@@ -448,9 +448,9 @@ func handshake(sock io.ReadWriteCloser, ih *InfoHash, peerID [20]byte) (res hand
 	if string(b[:20]) != pp.Protocol {
 		return
 	}
-	copy(res.peerExtensionBytes[:], b[20:28])
-	copy(res.InfoHash[:], b[28:48])
-	copy(res.peerID[:], b[48:68])
+	CopyExact(&res.peerExtensionBytes, b[20:28])
+	CopyExact(&res.InfoHash, b[28:48])
+	CopyExact(&res.peerID, b[48:68])
 
 	if ih == nil { // We were waiting for the peer to tell us what they wanted.
 		post(res.InfoHash[:])