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Catch EINTR

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This commit is contained in:
Jason A. Donenfeld 2018-05-24 15:29:16 +02:00
parent 66f6ca3e4a
commit 2f2eca8947
11 changed files with 40 additions and 27 deletions
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4
conn_linux.go
View File

@ -18,8 +18,8 @@
package main
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"errors"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/sys/unix"
"net"
"strconv"
@ -563,7 +563,7 @@ func (bind *NativeBind) routineRouteListener(device *Device) {
var msgn int
for {
msgn, _, _, _, err = unix.Recvmsg(bind.netlinkSock, msg[:], nil, 0)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
break
}
if !bind.netlinkCancel.ReadyRead() {

2
cookie.go
View File

@ -7,9 +7,9 @@
package main
import (
"git.zx2c4.com/wireguard-go/xchacha20poly1305"
"crypto/hmac"
"crypto/rand"
"git.zx2c4.com/wireguard-go/xchacha20poly1305"
"golang.org/x/crypto/blake2s"
"golang.org/x/crypto/chacha20poly1305"
"sync"

2
keypair.go
View File

@ -7,8 +7,8 @@
package main
import (
"git.zx2c4.com/wireguard-go/replay"
"crypto/cipher"
"git.zx2c4.com/wireguard-go/replay"
"sync"
"time"
)

2
main.go
View File

@ -7,8 +7,8 @@
package main
import (
"git.zx2c4.com/wireguard-go/tun"
"fmt"
"git.zx2c4.com/wireguard-go/tun"
"os"
"os/signal"
"runtime"

2
noise-protocol.go
View File

@ -7,8 +7,8 @@
package main
import (
"git.zx2c4.com/wireguard-go/tai64n"
"errors"
"git.zx2c4.com/wireguard-go/tai64n"
"golang.org/x/crypto/blake2s"
"golang.org/x/crypto/chacha20poly1305"
"golang.org/x/crypto/poly1305"

17
rwcancel/rwcancel.go
View File

@ -40,15 +40,16 @@ func NewRWCancel(fd int) (*RWCancel, error) {
return &rwcancel, nil
}
/* https://golang.org/src/crypto/rand/eagain.go */
func ErrorIsEAGAIN(err error) bool {
func RetryAfterError(err error) bool {
if pe, ok := err.(*os.PathError); ok {
if errno, ok := pe.Err.(syscall.Errno); ok && errno == syscall.EAGAIN {
err = pe.Err
}
if errno, ok := err.(syscall.Errno); ok {
switch errno {
case syscall.EAGAIN, syscall.EINTR:
return true
}
}
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EAGAIN {
return true
}
return false
}
@ -86,7 +87,7 @@ func (rw *RWCancel) ReadyWrite() bool {
func (rw *RWCancel) Read(p []byte) (n int, err error) {
for {
n, err := unix.Read(rw.fd, p)
if err == nil || !ErrorIsEAGAIN(err) {
if err == nil || !RetryAfterError(err) {
return n, err
}
if !rw.ReadyRead() {
@ -98,7 +99,7 @@ func (rw *RWCancel) Read(p []byte) (n int, err error) {
func (rw *RWCancel) Write(p []byte) (n int, err error) {
for {
n, err := unix.Write(rw.fd, p)
if err == nil || !ErrorIsEAGAIN(err) {
if err == nil || !RetryAfterError(err) {
return n, err
}
if !rw.ReadyWrite() {

9
tun/tun_darwin.go
View File

@ -7,14 +7,15 @@
package tun
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"errors"
"fmt"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
"io/ioutil"
"net"
"os"
"syscall"
"unsafe"
)
@ -54,8 +55,12 @@ func (tun *nativeTun) routineRouteListener(tunIfindex int) {
data := make([]byte, os.Getpagesize())
for {
retry:
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EINTR {
goto retry
}
tun.errors <- err
return
}
@ -259,7 +264,7 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
for {
n, err := tun.doRead(buff, offset)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
return n, err
}
if !tun.rwcancel.ReadyRead() {

9
tun/tun_freebsd.go
View File

@ -6,14 +6,15 @@
package tun
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"bytes"
"errors"
"fmt"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
"net"
"os"
"syscall"
"unsafe"
)
@ -67,8 +68,12 @@ func (tun *nativeTun) routineRouteListener(tunIfindex int) {
data := make([]byte, os.Getpagesize())
for {
retry:
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EINTR {
goto retry
}
tun.errors <- err
return
}
@ -392,7 +397,7 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
for {
n, err := tun.doRead(buff, offset)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
return n, err
}
if !tun.rwcancel.ReadyRead() {

6
tun/tun_linux.go
View File

@ -12,10 +12,10 @@ package tun
*/
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"bytes"
"errors"
"fmt"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
"net"
@ -102,7 +102,7 @@ func (tun *nativeTun) routineNetlinkListener() {
var msgn int
for {
msgn, _, _, _, err = unix.Recvmsg(tun.netlinkSock, msg[:], nil, 0)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
break
}
if !tun.netlinkCancel.ReadyRead() {
@ -334,7 +334,7 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
for {
n, err := tun.doRead(buff, offset)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
return n, err
}
if !tun.fdCancel.ReadyRead() {

12
tun/tun_openbsd.go
View File

@ -6,9 +6,9 @@
package tun
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"errors"
"fmt"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/net/ipv6"
"golang.org/x/sys/unix"
"io/ioutil"
@ -46,8 +46,12 @@ func (tun *nativeTun) routineRouteListener(tunIfindex int) {
data := make([]byte, os.Getpagesize())
for {
retry:
n, err := unix.Read(tun.routeSocket, data)
if err != nil {
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EINTR {
goto retry
}
tun.errors <- err
return
}
@ -90,9 +94,7 @@ func (tun *nativeTun) routineRouteListener(tunIfindex int) {
func errorIsEBUSY(err error) bool {
if pe, ok := err.(*os.PathError); ok {
if errno, ok := pe.Err.(syscall.Errno); ok && errno == syscall.EBUSY {
return true
}
err = pe.Err
}
if errno, ok := err.(syscall.Errno); ok && errno == syscall.EBUSY {
return true
@ -237,7 +239,7 @@ func (tun *nativeTun) doRead(buff []byte, offset int) (int, error) {
func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
for {
n, err := tun.doRead(buff, offset)
if err == nil || !rwcancel.ErrorIsEAGAIN(err) {
if err == nil || !rwcancel.RetryAfterError(err) {
return n, err
}
if !tun.rwcancel.ReadyRead() {

2
uapi_linux.go
View File

@ -7,9 +7,9 @@
package main
import (
"git.zx2c4.com/wireguard-go/rwcancel"
"errors"
"fmt"
"git.zx2c4.com/wireguard-go/rwcancel"
"golang.org/x/sys/unix"
"net"
"os"