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chore: using stable api

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This commit is contained in:
wwqgtxx
2023-12-08 19:04:29 +08:00
parent 8dbc5e2100
commit 262d3295d1
3 changed files with 14 additions and 11 deletions
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6
listener/sing_tun/dns.go
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@@ -98,6 +98,8 @@ func (h *ListenerHandler) NewConnection(ctx context.Context, conn net.Conn, meta
return h.ListenerHandler.NewConnection(ctx, conn, metadata)
}
const SafeDnsPacketSize = 2 * 1024 // safe size which is 1232 from https://dnsflagday.net/2020/, so 2048 is enough
func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.PacketConn, metadata M.Metadata) error {
if h.ShouldHijackDns(metadata.Destination.AddrPort()) {
log.Debugln("[DNS] hijack udp:%s from %s", metadata.Destination.String(), metadata.Source.String())
@@ -112,7 +114,7 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
rwOptions := network.ReadWaitOptions{
FrontHeadroom: network.CalculateFrontHeadroom(conn),
RearHeadroom: network.CalculateRearHeadroom(conn),
MTU: 2 * 1024, // safe size which is 1232 from https://dnsflagday.net/2020/, so 2048 is enough
MTU: SafeDnsPacketSize,
}
readWaiter, isReadWaiter := bufio.CreatePacketReadWaiter(conn)
if isReadWaiter {
@@ -150,7 +152,7 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
inData := readBuff.Bytes()
writeBuff := readBuff
writeBuff.Resize(writeBuff.Start(), 0)
if writeBuff.Cap() < rwOptions.MTU { // only create a new buffer when space don't enough
if len(writeBuff.FreeBytes()) < SafeDnsPacketSize { // only create a new buffer when space don't enough
writeBuff = rwOptions.NewPacketBuffer()
}
msg, err := RelayDnsPacket(ctx, inData, writeBuff.FreeBytes())