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tun: windows: never retry open on Windows 10

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This commit is contained in:
Jason A. Donenfeld 2019-06-18 16:08:28 +02:00
parent 1f48971a80
commit c69d026649
4 changed files with 22 additions and 13 deletions
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6
go.mod
View File

@ -3,7 +3,7 @@ module golang.zx2c4.com/wireguard
go 1.12 go 1.12
require ( require (
golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f golang.org/x/crypto v0.0.0-20190617133340-57b3e21c3d56
golang.org/x/net v0.0.0-20190522155817-f3200d17e092 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980
golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444 golang.org/x/sys v0.0.0-20190618155005-516e3c20635f
) )

12
go.sum
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@ -1,11 +1,11 @@
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f h1:R423Cnkcp5JABoeemiGEPlt9tHXFfw5kvc0yqlxRPWo= golang.org/x/crypto v0.0.0-20190617133340-57b3e21c3d56 h1:ZpKuNIejY8P0ExLOVyKhb0WsgG8UdvHXe6TWjY7eL6k=
golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/crypto v0.0.0-20190617133340-57b3e21c3d56/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190522155817-f3200d17e092 h1:4QSRKanuywn15aTZvI/mIDEgPQpswuFndXpOj3rKEco= golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 h1:dfGZHvZk057jK2MCeWus/TowKpJ8y4AmooUzdBSR9GU=
golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444 h1:/d2cWp6PSamH4jDPFLyO150psQdqvtoNX8Zjg3AQ31g= golang.org/x/sys v0.0.0-20190618155005-516e3c20635f h1:dHNZYIYdq2QuU6w73vZ/DzesPbVlZVYZTtTZmrnsbQ8=
golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190618155005-516e3c20635f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

15
tun/tun_windows.go
View File

@ -55,6 +55,15 @@ func packetAlign(size uint32) uint32 {
return (size + (packetExchangeAlignment - 1)) &^ (packetExchangeAlignment - 1) return (size + (packetExchangeAlignment - 1)) &^ (packetExchangeAlignment - 1)
} }
var shouldRetryOpen = windows.RtlGetVersion().MajorVersion < 10
func maybeRetry(x int) int {
if shouldRetryOpen {
return x
}
return 0
}
// //
// CreateTUN creates a Wintun adapter with the given name. Should a Wintun // CreateTUN creates a Wintun adapter with the given name. Should a Wintun
// adapter with the same name exist, it is reused. // adapter with the same name exist, it is reused.
@ -104,7 +113,7 @@ func CreateTUNWithRequestedGUID(ifname string, requestedGUID *windows.GUID) (Dev
} }
func (tun *NativeTun) openTUN() error { func (tun *NativeTun) openTUN() error {
retries := retryTimeout * retryRate retries := maybeRetry(retryTimeout * retryRate)
if tun.close { if tun.close {
return os.ErrClosed return os.ErrClosed
} }
@ -238,7 +247,7 @@ func (tun *NativeTun) Read(buff []byte, offset int) (int, error) {
default: default:
} }
retries := 1000 retries := maybeRetry(1000)
for { for {
if tun.rdBuff.offset+packetExchangeAlignment <= tun.rdBuff.avail { if tun.rdBuff.offset+packetExchangeAlignment <= tun.rdBuff.avail {
// Get packet from the exchange buffer. // Get packet from the exchange buffer.
@ -302,7 +311,7 @@ func (tun *NativeTun) Flush() error {
tun.wrBuff.packetNum = 0 tun.wrBuff.packetNum = 0
tun.wrBuff.offset = 0 tun.wrBuff.offset = 0
}() }()
retries := 1000 retries := maybeRetry(1000)
for { for {
// Get TUN data pipe. // Get TUN data pipe.