Fix gvisor udp write back

go.mod

@@ -19,10 +19,10 @@ require (
 	github.com/sagernet/certmagic v0.0.0-20220819042630-4a57f8b6853a
 	github.com/sagernet/netlink v0.0.0-20220820041223-3cd8365d17ac
 	github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb
-	github.com/sagernet/sing v0.0.0-20220820125206-f0c2e5a0dcc2
+	github.com/sagernet/sing v0.0.0-20220821004238-5945fd0457b2
 	github.com/sagernet/sing-dns v0.0.0-20220819010310-839eab1578c9
 	github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6
-	github.com/sagernet/sing-tun v0.0.0-20220820054007-ce3573838b1e
+	github.com/sagernet/sing-tun v0.0.0-20220821033717-8b6630a3b006
 	github.com/sagernet/sing-vmess v0.0.0-20220811135656-4f3f07acf9c4
 	github.com/sagernet/smux v0.0.0-20220812084127-e2d085ee3939
 	github.com/spf13/cobra v1.5.0

go.sum

@@ -101,14 +101,14 @@ github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb h1:wc0yQ+SBn4TaTY
 github.com/sagernet/quic-go v0.0.0-20220818150011-de611ab3e2bb/go.mod h1:MIccjRKnPTjWwAOpl+AUGWOkzyTd9tERytudxu+1ra4=
 github.com/sagernet/sing v0.0.0-20220812082120-05f9836bff8f/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
-github.com/sagernet/sing v0.0.0-20220820125206-f0c2e5a0dcc2 h1:9wlER8wPHDjqzDGpqoBWcZ6/MBUL00my7D+hdCCaNiI=
-github.com/sagernet/sing v0.0.0-20220820125206-f0c2e5a0dcc2/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
+github.com/sagernet/sing v0.0.0-20220821004238-5945fd0457b2 h1:YPMNtVvpb8D6rh3kRfcV9y/3bJcDp5i40ptPBYsENgU=
+github.com/sagernet/sing v0.0.0-20220821004238-5945fd0457b2/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing-dns v0.0.0-20220819010310-839eab1578c9 h1:XgXSOJv8e7+98SJvg1f0luuPR33r4yFcmzxb3R//BTI=
 github.com/sagernet/sing-dns v0.0.0-20220819010310-839eab1578c9/go.mod h1:MAHy2IKZAA101t3Gr2x0ldwn6XuAs2cjGzSzHy5RhWk=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6 h1:JJfDeYYhWunvtxsU/mOVNTmFQmnzGx9dY034qG6G3g4=
 github.com/sagernet/sing-shadowsocks v0.0.0-20220819002358-7461bb09a8f6/go.mod h1:EX3RbZvrwAkPI2nuGa78T2iQXmrkT+/VQtskjou42xM=
-github.com/sagernet/sing-tun v0.0.0-20220820054007-ce3573838b1e h1:ZuxqB+21PyZ93l+CX+gdjDqpg1YRKpbfiGP9rSjxp0Q=
-github.com/sagernet/sing-tun v0.0.0-20220820054007-ce3573838b1e/go.mod h1:zMKRFCEoO6Jp5Yxb2NUTqc+SvAtNVAmzfwArAheJy5g=
+github.com/sagernet/sing-tun v0.0.0-20220821033717-8b6630a3b006 h1:c1UyJ5H4CNLsg4GsAnNNoDAnHzLB13pm/T4zzvaWcFo=
+github.com/sagernet/sing-tun v0.0.0-20220821033717-8b6630a3b006/go.mod h1:zMKRFCEoO6Jp5Yxb2NUTqc+SvAtNVAmzfwArAheJy5g=
 github.com/sagernet/sing-vmess v0.0.0-20220811135656-4f3f07acf9c4 h1:2hLETh97+S4WnfMR27XyC7QVU1SH7FTNoCznP229YJU=
 github.com/sagernet/sing-vmess v0.0.0-20220811135656-4f3f07acf9c4/go.mod h1:82O6gzbxLha/W/jxSVQbsqf2lVdRTjMIgyLug0lpJps=
 github.com/sagernet/smux v0.0.0-20220812084127-e2d085ee3939 h1:pB1Dh1NbwVrLhQhotr4O4Hs3yhiBzmg3AvnUyYjL4x4=