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Restore local peer discovery mechanism on Android 11+ (#1158)

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This solution is bases on https://github.com/wlynxg/anet project.
`github.com/wlynxg/anet` is a partial alternative implementation of the
`golang.org/x/net` module. The goal of `anet` module is to provide
workarounds of the issues https://github.com/golang/go/issues/40569 and
https://github.com/golang/go/issues/68082 on Android 11+.

Tested on AOSP 13.

Resolves: #1149
This commit is contained in:
Sergey Bobrenok 2024-08-16 20:28:57 +03:00 committed by GitHub
parent 340cedbe14
commit 947b6ad7aa
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GPG Key ID: B5690EEEBB952194
3 changed files with 10 additions and 3 deletions
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1
go.mod
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@ -12,6 +12,7 @@ require (
github.com/kardianos/minwinsvc v1.0.2
github.com/quic-go/quic-go v0.45.1
github.com/vishvananda/netlink v1.1.0
github.com/wlynxg/anet v0.0.4-0.20240806025826-e684438fc7c6
golang.org/x/crypto v0.25.0
golang.org/x/mobile v0.0.0-20240716161057-1ad2df20a8b6
golang.org/x/net v0.27.0

2
go.sum
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@ -70,6 +70,8 @@ github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYp
github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f h1:p4VB7kIXpOQvVn1ZaTIVp+3vuYAXFe3OJEvjbUYJLaA=
github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=
github.com/wlynxg/anet v0.0.4-0.20240806025826-e684438fc7c6 h1:c/wkXIJvpg2oot7iFqPESTBAO9UvhWTBnW97y9aPgyU=
github.com/wlynxg/anet v0.0.4-0.20240806025826-e684438fc7c6/go.mod h1:eay5PRQr7fIVAMbTbchTnO9gG65Hg/uYGdc7mguHxoA=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=

10
src/multicast/multicast.go
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@ -14,6 +14,7 @@ import (
"github.com/Arceliar/phony"
"github.com/gologme/log"
"github.com/wlynxg/anet"
"github.com/yggdrasil-network/yggdrasil-go/src/core"
"golang.org/x/crypto/blake2b"
@ -148,7 +149,8 @@ func (m *Multicast) _stop() error {
func (m *Multicast) _updateInterfaces() {
interfaces := m._getAllowedInterfaces()
for name, info := range interfaces {
addrs, err := info.iface.Addrs()
// 'anet' package is used here to avoid https://github.com/golang/go/issues/40569
addrs, err := anet.InterfaceAddrsByInterface(&info.iface)
if err != nil {
m.log.Warnf("Failed up get addresses for interface %s: %s", name, err)
delete(interfaces, name)
@ -156,6 +158,7 @@ func (m *Multicast) _updateInterfaces() {
}
info.addrs = addrs
interfaces[name] = info
m.log.Debugf("Discovered addresses for interface %s: %s", name, addrs)
}
m._interfaces = interfaces
}
@ -174,10 +177,11 @@ func (m *Multicast) Interfaces() map[string]net.Interface {
func (m *Multicast) _getAllowedInterfaces() map[string]*interfaceInfo {
interfaces := make(map[string]*interfaceInfo)
// Ask the system for network interfaces
allifaces, err := net.Interfaces()
// 'anet' package is used here to avoid https://github.com/golang/go/issues/40569
allifaces, err := anet.Interfaces()
if err != nil {
// Don't panic, since this may be from e.g. too many open files (from too much connection spam)
// TODO? log something
m.log.Debugf("Failed to get interfaces: %s", err)
return nil
}
// Work out which interfaces to announce on