set CompatibilityMode for android (#4091)

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fatedier 2024-03-21 17:34:09 +08:00 committed by GitHub
parent b36f3834eb
commit f16ef00975
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8 changed files with 98 additions and 6 deletions

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@ -2,7 +2,7 @@ export PATH := $(PATH):`go env GOPATH`/bin
export GO111MODULE=on
LDFLAGS := -s -w
os-archs=darwin:amd64 darwin:arm64 freebsd:amd64 linux:amd64 linux:arm linux:arm64 windows:amd64 windows:arm64 linux:mips64 linux:mips64le linux:mips:softfloat linux:mipsle:softfloat linux:riscv64
os-archs=darwin:amd64 darwin:arm64 freebsd:amd64 linux:amd64 linux:arm linux:arm64 windows:amd64 windows:arm64 linux:mips64 linux:mips64le linux:mips:softfloat linux:mipsle:softfloat linux:riscv64 android:arm64
all: build

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@ -17,6 +17,7 @@
This will create 8 proxies such as `tcp-6000, tcp-6001, ... tcp-6007`.
* Health check supports custom request headers.
* Enable compatibility mode for the Android system to solve the issues of incorrect log time caused by time zone problems and default DNS resolution failures.
### Fixes

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@ -17,8 +17,10 @@ package main
import (
_ "github.com/fatedier/frp/assets/frpc"
"github.com/fatedier/frp/cmd/frpc/sub"
"github.com/fatedier/frp/pkg/util/system"
)
func main() {
system.EnableCompatibilityMode()
sub.Execute()
}

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@ -15,13 +15,12 @@
package main
import (
"github.com/fatedier/golib/crypto"
_ "github.com/fatedier/frp/assets/frps"
_ "github.com/fatedier/frp/pkg/metrics"
"github.com/fatedier/frp/pkg/util/system"
)
func main() {
crypto.DefaultSalt = "frp"
system.EnableCompatibilityMode()
Execute()
}

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@ -26,8 +26,8 @@ func SetDefaultDNSAddress(dnsAddress string) {
// Change default dns server
net.DefaultResolver = &net.Resolver{
PreferGo: true,
Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
return net.Dial("udp", dnsAddress)
Dial: func(ctx context.Context, network, _ string) (net.Conn, error) {
return net.Dial(network, dnsAddress)
},
}
}

22
pkg/util/system/system.go Normal file
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@ -0,0 +1,22 @@
// Copyright 2024 The frp Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !android
package system
// EnableCompatibilityMode enables compatibility mode for different system.
// For example, on Android, the inability to obtain the correct time zone will result in incorrect log time output.
func EnableCompatibilityMode() {
}

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@ -0,0 +1,66 @@
// Copyright 2024 The frp Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package system
import (
"context"
"net"
"os/exec"
"strings"
"time"
)
func EnableCompatibilityMode() {
fixTimezone()
fixDNSResolver()
}
// fixTimezone is used to try our best to fix timezone issue on some Android devices.
func fixTimezone() {
out, err := exec.Command("/system/bin/getprop", "persist.sys.timezone").Output()
if err != nil {
return
}
loc, err := time.LoadLocation(strings.TrimSpace(string(out)))
if err != nil {
return
}
time.Local = loc
}
// fixDNSResolver will first attempt to resolve google.com to check if the current DNS is available.
// If it is not available, it will default to using 8.8.8.8 as the DNS server.
// This is a workaround for the issue that golang can't get the default DNS servers on Android.
func fixDNSResolver() {
// First, we attempt to resolve a domain. If resolution is successful, no modifications are necessary.
// In real-world scenarios, users may have already configured /etc/resolv.conf, or compiled directly
// in the Android environment instead of using cross-platform compilation, so this issue does not arise.
if net.DefaultResolver != nil {
timeoutCtx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
_, err := net.DefaultResolver.LookupHost(timeoutCtx, "google.com")
if err == nil {
return
}
}
// If the resolution fails, use 8.8.8.8 as the DNS server.
// Note: If there are other methods to obtain the default DNS servers, the default DNS servers should be used preferentially.
net.DefaultResolver = &net.Resolver{
PreferGo: true,
Dial: func(ctx context.Context, network, _ string) (net.Conn, error) {
return net.Dial(network, "8.8.8.8:53")
},
}
}

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@ -26,6 +26,7 @@ import (
"strconv"
"time"
"github.com/fatedier/golib/crypto"
"github.com/fatedier/golib/net/mux"
fmux "github.com/hashicorp/yamux"
quic "github.com/quic-go/quic-go"
@ -61,6 +62,7 @@ const (
)
func init() {
crypto.DefaultSalt = "frp"
// Disable quic-go's receive buffer warning.
os.Setenv("QUIC_GO_DISABLE_RECEIVE_BUFFER_WARNING", "true")
// Disable quic-go's ECN support by default. It may cause issues on certain operating systems.