Explicitly make Bytes counter 64-bits long

On 32-bit systems int by default is 32-bits long and that counter can
not hold 2**32 value.

Signed-off-by: Sergey Matveev <stargrave@stargrave.org>

diff --git a/transport.go b/transport.go
index a1ca506ce2debb34f2c728abba023245610373ab..08144de4675aed598d6f183d772a8861cfb05248 100644 (file)
--- a/transport.go
+++ b/transport.go
@@ -37,7 +37,7 @@ const (
        S20BS         = 64
        HeartbeatSize = 12
        // Maximal amount of bytes transfered with single key (4 GiB)
-       MaxBytesPerKey = 1 << 32
+       MaxBytesPerKey int64 = 1 << 32
 )
 
 type UDPPkt struct {
@@ -58,7 +58,7 @@ type Peer struct {
        tag         *[poly1305.TagSize]byte
        keyAuth     *[KeySize]byte
        nonceRecv   uint64
-       Bytes       int
+       Bytes       int64
        frame       []byte
        nonce       []byte
 }
@@ -242,7 +242,7 @@ func (p *Peer) UDPProcess(udpPkt []byte, tap *TAP, ready chan struct{}) bool {
        p.LastPing = time.Now()
        p.NonceRecv = p.nonceRecv
        p.frame = p.buf[S20BS : S20BS+size-NonceSize-poly1305.TagSize]
-       p.Bytes += len(p.frame)
+       p.Bytes += int64(len(p.frame))
        if subtle.ConstantTimeCompare(p.frame[:HeartbeatSize], HeartbeatMark) == 1 {
                return true
        }
@@ -282,7 +282,7 @@ func (p *Peer) EthProcess(ethPkt []byte, conn *net.UDPConn, ready chan struct{})
        p.frame = p.buf[S20BS-NonceSize : S20BS+size]
        poly1305.Sum(p.tag, p.frame, p.keyAuth)
 
-       p.Bytes += len(p.frame)
+       p.Bytes += int64(len(p.frame))
        p.LastSent = now
        if _, err := conn.WriteTo(append(p.frame, p.tag[:]...), p.Addr); err != nil {
                log.Println("Error sending UDP", err)