Reject invalid connection

go.mod

@@ -25,14 +25,14 @@ require (
 	github.com/sagernet/gvisor v0.0.0-20230627031050-1ab0276e0dd2
 	github.com/sagernet/quic-go v0.0.0-20230825040534-0cd917b2ddda
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
-	github.com/sagernet/sing v0.2.10-0.20230830132630-30bf19f2833c
+	github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205
 	github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1
-	github.com/sagernet/sing-mux v0.1.3-0.20230830095209-2a10ebd53ba8
+	github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314
-	github.com/sagernet/sing-shadowsocks v0.2.4
+	github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0
-	github.com/sagernet/sing-shadowsocks2 v0.1.3
+	github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248
 	github.com/sagernet/sing-shadowtls v0.1.4
 	github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641
-	github.com/sagernet/sing-vmess v0.1.7
+	github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b
 	github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37
 	github.com/sagernet/tfo-go v0.0.0-20230816093905-5a5c285d44a6
 	github.com/sagernet/utls v0.0.0-20230309024959-6732c2ab36f2

go.sum

@@ -114,22 +114,22 @@ github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byL
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
-github.com/sagernet/sing v0.2.10-0.20230830132630-30bf19f2833c h1:J2ptRncTNy+ZHfcFYSBfTmpvmgNlSEUZz6sDjh1np/Y=
+github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205 h1:U/OwMlCH1XFjrDrw5BESGxGsnynT6nDnHvNI9Xv0U78=
-github.com/sagernet/sing v0.2.10-0.20230830132630-30bf19f2833c/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
+github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
 github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1 h1:5w+jXz8y/8UQAxO74TjftN5okYkpg5mGvVxXunlKdqI=
 github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
-github.com/sagernet/sing-mux v0.1.3-0.20230830095209-2a10ebd53ba8 h1:UyUkEUEGqfIGqzOJ7OuJry4slgcT/qb0etDJ+89LTAs=
+github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314 h1:P5+NZGMH8KSI3L8lKw1znxdRi0tIpWbGYjmv8GrFHrQ=
-github.com/sagernet/sing-mux v0.1.3-0.20230830095209-2a10ebd53ba8/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
+github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
-github.com/sagernet/sing-shadowsocks v0.2.4 h1:s/CqXlvFAZhlIoHWUwPw5CoNnQ9Ibki9pckjuugtVfY=
+github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0 h1:9wHYWxH+fcs01PM2+DylA8LNNY3ElnZykQo9rysng8U=
-github.com/sagernet/sing-shadowsocks v0.2.4/go.mod h1:80fNKP0wnqlu85GZXV1H1vDPC/2t+dQbFggOw4XuFUM=
+github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0/go.mod h1:80fNKP0wnqlu85GZXV1H1vDPC/2t+dQbFggOw4XuFUM=
-github.com/sagernet/sing-shadowsocks2 v0.1.3 h1:WXoLvCFi5JTFBRYorf1YePGYIQyJ/zbsBM6Fwbl5kGA=
+github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248 h1:JTFfy/LDmVFEK4KZJEujmC1iO8+aoF4unYhhZZRzRq4=
-github.com/sagernet/sing-shadowsocks2 v0.1.3/go.mod h1:DOhJc/cLeqRv0wuePrQso+iUmDxOnWF4eT/oMcRzYFw=
+github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248/go.mod h1:DOhJc/cLeqRv0wuePrQso+iUmDxOnWF4eT/oMcRzYFw=
 github.com/sagernet/sing-shadowtls v0.1.4 h1:aTgBSJEgnumzFenPvc+kbD9/W0PywzWevnVpEx6Tw3k=
 github.com/sagernet/sing-shadowtls v0.1.4/go.mod h1:F8NBgsY5YN2beQavdgdm1DPlhaKQlaL6lpDdcBglGK4=
 github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641 h1:a8lktNrCWZJisB+nPraW+qB73ZofgPtGmlfqNYcO79g=
 github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641/go.mod h1:+YImslQMLgMQcVgZZ9IK4ue1o/605VSU90amHUcp4hA=
-github.com/sagernet/sing-vmess v0.1.7 h1:TM8FFLsXmlXH9XT8/oDgc6PC5BOzrg6OzyEe01is2r4=
+github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b h1:2ezfJtH5JosiEwJhVa+rimQ6ps/t2+7h+mOzMoiaZnA=
-github.com/sagernet/sing-vmess v0.1.7/go.mod h1:1qkC1L1T2sxnS/NuO6HU72S8TkltV+EXoKGR29m/Yss=
+github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b/go.mod h1:1qkC1L1T2sxnS/NuO6HU72S8TkltV+EXoKGR29m/Yss=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 h1:HuE6xSwco/Xed8ajZ+coeYLmioq0Qp1/Z2zczFaV8as=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37/go.mod h1:3skNSftZDJWTGVtVaM2jfbce8qHnmH/AGDRe62iNOg0=
 github.com/sagernet/tfo-go v0.0.0-20230816093905-5a5c285d44a6 h1:Px+hN4Vzgx+iCGVnWH5A8eR7JhNnIV3rGQmBxA7cw6Q=

test/go.mod

@@ -10,9 +10,9 @@ require (
 	github.com/docker/docker v24.0.5+incompatible
 	github.com/docker/go-connections v0.4.0
 	github.com/gofrs/uuid/v5 v5.0.0
-	github.com/sagernet/sing v0.2.10-0.20230830132630-30bf19f2833c
+	github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205
-	github.com/sagernet/sing-shadowsocks v0.2.4
+	github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0
-	github.com/sagernet/sing-shadowsocks2 v0.1.3
+	github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248
 	github.com/spyzhov/ajson v0.9.0
 	github.com/stretchr/testify v1.8.4
 	go.uber.org/goleak v1.2.1
@@ -73,10 +73,10 @@ require (
 	github.com/sagernet/quic-go v0.0.0-20230825040534-0cd917b2ddda // indirect
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 // indirect
 	github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1 // indirect
-	github.com/sagernet/sing-mux v0.1.3-0.20230830095209-2a10ebd53ba8 // indirect
+	github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314 // indirect
 	github.com/sagernet/sing-shadowtls v0.1.4 // indirect
 	github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641 // indirect
-	github.com/sagernet/sing-vmess v0.1.7 // indirect
+	github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b // indirect
 	github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 // indirect
 	github.com/sagernet/tfo-go v0.0.0-20230816093905-5a5c285d44a6 // indirect
 	github.com/sagernet/utls v0.0.0-20230309024959-6732c2ab36f2 // indirect

test/go.sum

@@ -113,8 +113,7 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.4.0 h1:Cr9BXA1sQS2SmDUWjSofMPNKmvF6IiIfDRmgU0w1ZCo=
 github.com/quic-go/qpack v0.4.0/go.mod h1:UZVnYIfi5GRk+zI9UMaCPsmZ2xKJP7XBUvVyT1Knj9A=
-github.com/quic-go/qtls-go1-20 v0.3.2 h1:rRgN3WfnKbyik4dBV8A6girlJVxGand/d+jVKbQq5GI=
+github.com/quic-go/qtls-go1-20 v0.3.3 h1:17/glZSLI9P9fDAeyCHBFSWSqJcwx1byhLwP5eUIDCM=
-github.com/quic-go/qtls-go1-20 v0.3.2/go.mod h1:X9Nh97ZL80Z+bX/gUXMbipO6OxdiDi58b/fMC9mAL+k=
 github.com/quic-go/qtls-go1-20 v0.3.3/go.mod h1:X9Nh97ZL80Z+bX/gUXMbipO6OxdiDi58b/fMC9mAL+k=
 github.com/sagernet/cloudflare-tls v0.0.0-20221031050923-d70792f4c3a0 h1:KyhtFFt1Jtp5vW2ohNvstvQffTOQ/s5vENuGXzdA+TM=
 github.com/sagernet/cloudflare-tls v0.0.0-20221031050923-d70792f4c3a0/go.mod h1:D4SFEOkJK+4W1v86ZhX0jPM0rAL498fyQAChqMtes/I=
@@ -124,33 +123,28 @@ github.com/sagernet/gvisor v0.0.0-20230627031050-1ab0276e0dd2 h1:dnkKrzapqtAwjTS
 github.com/sagernet/gvisor v0.0.0-20230627031050-1ab0276e0dd2/go.mod h1:1JUiV7nGuf++YFm9eWZ8q2lrwHmhcUGzptMl/vL1+LA=
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 h1:iL5gZI3uFp0X6EslacyapiRz7LLSJyr4RajF/BhMVyE=
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
-github.com/sagernet/quic-go v0.0.0-20230824033040-30ef72e3be3e h1:URg7GQT9Mp0b6m/LXH1NgVT3P/ybVomvy2kkfA6QIHQ=
+github.com/sagernet/quic-go v0.0.0-20230825040534-0cd917b2ddda h1:7J/hnOFqCThiCrVpvr0wKO+Dic/XPSulPr5yI8FVJMs=
-github.com/sagernet/quic-go v0.0.0-20230824033040-30ef72e3be3e/go.mod h1:7DXnweBVxZ7CQWsCdc7QAAQ65dFPEtenfz+w6WDESlI=
 github.com/sagernet/quic-go v0.0.0-20230825040534-0cd917b2ddda/go.mod h1:Iw8Tt3dMqC/61cMHa0nN5i/958oYuuMnQCMOSPx+xcg=
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691 h1:5Th31OC6yj8byLGkEnIYp6grlXfo1QYUfiYFGjewIdc=
 github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691/go.mod h1:B8lp4WkQ1PwNnrVMM6KyuFR20pU8jYBD+A4EhJovEXU=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
-github.com/sagernet/sing v0.2.10-0.20230821073500-620f3a3b882d h1:4kgoOCE48CuQcBUcoRnE0QTPXkl8yM8i7Nipmzp/978=
+github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205 h1:U/OwMlCH1XFjrDrw5BESGxGsnynT6nDnHvNI9Xv0U78=
-github.com/sagernet/sing v0.2.10-0.20230821073500-620f3a3b882d/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
+github.com/sagernet/sing v0.2.10-0.20230907044649-03c21c0a1205/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
-github.com/sagernet/sing v0.2.10-0.20230824115837-8d731e68853a/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
+github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1 h1:5w+jXz8y/8UQAxO74TjftN5okYkpg5mGvVxXunlKdqI=
-github.com/sagernet/sing v0.2.10-0.20230830132630-30bf19f2833c/go.mod h1:9uOZwWkhT2Z2WldolLxX34s+1svAX4i4vvz5hy8u1MA=
-github.com/sagernet/sing-dns v0.1.9-0.20230731012726-ad50da89b659 h1:1DAKccGNqTYJ8nsBR765FS0LVBVXfuFlFAHqKsGN3EI=
-github.com/sagernet/sing-dns v0.1.9-0.20230731012726-ad50da89b659/go.mod h1:W7GHTZFS8RkoLI3bA2LFY27/0E+uoQESWtMFLepO/JA=
 github.com/sagernet/sing-dns v0.1.9-0.20230824120133-4d5cbceb40c1/go.mod h1:Kg98PBJEg/08jsNFtmZWmPomhskn9Ausn50ecNm4M+8=
-github.com/sagernet/sing-mux v0.1.3-0.20230811111955-dc1639b5204c h1:35/FowAvt3Z62mck0TXzVc4jS5R5CWq62qcV2P1cp0I=
+github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314 h1:P5+NZGMH8KSI3L8lKw1znxdRi0tIpWbGYjmv8GrFHrQ=
-github.com/sagernet/sing-mux v0.1.3-0.20230811111955-dc1639b5204c/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
+github.com/sagernet/sing-mux v0.1.3-0.20230907005326-7befbadbf314/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
-github.com/sagernet/sing-mux v0.1.3-0.20230830095209-2a10ebd53ba8/go.mod h1:TKxqIvfQQgd36jp2tzsPavGjYTVZilV+atip1cssjIY=
+github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0 h1:9wHYWxH+fcs01PM2+DylA8LNNY3ElnZykQo9rysng8U=
-github.com/sagernet/sing-shadowsocks v0.2.4 h1:s/CqXlvFAZhlIoHWUwPw5CoNnQ9Ibki9pckjuugtVfY=
+github.com/sagernet/sing-shadowsocks v0.2.5-0.20230907005610-126234728ca0/go.mod h1:80fNKP0wnqlu85GZXV1H1vDPC/2t+dQbFggOw4XuFUM=
-github.com/sagernet/sing-shadowsocks v0.2.4/go.mod h1:80fNKP0wnqlu85GZXV1H1vDPC/2t+dQbFggOw4XuFUM=
+github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248 h1:JTFfy/LDmVFEK4KZJEujmC1iO8+aoF4unYhhZZRzRq4=
-github.com/sagernet/sing-shadowsocks2 v0.1.3 h1:WXoLvCFi5JTFBRYorf1YePGYIQyJ/zbsBM6Fwbl5kGA=
+github.com/sagernet/sing-shadowsocks2 v0.1.4-0.20230907005906-5d2917b29248/go.mod h1:DOhJc/cLeqRv0wuePrQso+iUmDxOnWF4eT/oMcRzYFw=
-github.com/sagernet/sing-shadowsocks2 v0.1.3/go.mod h1:DOhJc/cLeqRv0wuePrQso+iUmDxOnWF4eT/oMcRzYFw=
 github.com/sagernet/sing-shadowtls v0.1.4 h1:aTgBSJEgnumzFenPvc+kbD9/W0PywzWevnVpEx6Tw3k=
 github.com/sagernet/sing-shadowtls v0.1.4/go.mod h1:F8NBgsY5YN2beQavdgdm1DPlhaKQlaL6lpDdcBglGK4=
 github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641 h1:a8lktNrCWZJisB+nPraW+qB73ZofgPtGmlfqNYcO79g=
 github.com/sagernet/sing-tun v0.1.12-0.20230821065522-7545dc2d5641/go.mod h1:+YImslQMLgMQcVgZZ9IK4ue1o/605VSU90amHUcp4hA=
-github.com/sagernet/sing-vmess v0.1.7 h1:TM8FFLsXmlXH9XT8/oDgc6PC5BOzrg6OzyEe01is2r4=
+github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b h1:2ezfJtH5JosiEwJhVa+rimQ6ps/t2+7h+mOzMoiaZnA=
-github.com/sagernet/sing-vmess v0.1.7/go.mod h1:1qkC1L1T2sxnS/NuO6HU72S8TkltV+EXoKGR29m/Yss=
+github.com/sagernet/sing-vmess v0.1.8-0.20230907010359-161fb0ac716b/go.mod h1:1qkC1L1T2sxnS/NuO6HU72S8TkltV+EXoKGR29m/Yss=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 h1:HuE6xSwco/Xed8ajZ+coeYLmioq0Qp1/Z2zczFaV8as=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37/go.mod h1:3skNSftZDJWTGVtVaM2jfbce8qHnmH/AGDRe62iNOg0=
 github.com/sagernet/tfo-go v0.0.0-20230816093905-5a5c285d44a6 h1:Px+hN4Vzgx+iCGVnWH5A8eR7JhNnIV3rGQmBxA7cw6Q=
@@ -192,8 +186,7 @@ go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.25.0 h1:4Hvk6GtkucQ790dqmj7l1eEnRdKm3k3ZUrUMS2d5+5c=
 go.uber.org/zap v1.25.0/go.mod h1:JIAUzQIH94IC4fOJQm7gMmBJP5k7wQfdcnYdPoEXJYk=
-go4.org/netipx v0.0.0-20230728184502-ec4c8b891b28 h1:zLxFnORHDFTSkJPawMU7LzsuGQJ4MUFS653jJHpORow=
+go4.org/netipx v0.0.0-20230824141953-6213f710f925 h1:eeQDDVKFkx0g4Hyy8pHgmZaK0EqB4SD6rvKbUdN3ziQ=
-go4.org/netipx v0.0.0-20230728184502-ec4c8b891b28/go.mod h1:TQvodOM+hJTioNQJilmLXu08JNb8i+ccq418+KWu1/Y=
 go4.org/netipx v0.0.0-20230824141953-6213f710f925/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=

transport/trojan/protocol.go

@@ -204,10 +204,13 @@ func ClientHandshake(conn net.Conn, key [KeyLength]byte, destination M.Socksaddr
 	common.Must1(header.Write(key[:]))
 	common.Must1(header.Write(CRLF))
 	common.Must(header.WriteByte(CommandTCP))
-	common.Must(M.SocksaddrSerializer.WriteAddrPort(header, destination))
+	err := M.SocksaddrSerializer.WriteAddrPort(header, destination)
+	if err != nil {
+		return err
+	}
 	common.Must1(header.Write(CRLF))
 	common.Must1(header.Write(payload))
-	_, err := conn.Write(header.Bytes())
+	_, err = conn.Write(header.Bytes())
 	if err != nil {
 		return E.Cause(err, "write request")
 	}
@@ -219,10 +222,13 @@ func ClientHandshakeBuffer(conn net.Conn, key [KeyLength]byte, destination M.Soc
 	common.Must1(header.Write(key[:]))
 	common.Must1(header.Write(CRLF))
 	common.Must(header.WriteByte(CommandTCP))
-	common.Must(M.SocksaddrSerializer.WriteAddrPort(header, destination))
+	err := M.SocksaddrSerializer.WriteAddrPort(header, destination)
+	if err != nil {
+		return err
+	}
 	common.Must1(header.Write(CRLF))
 
-	_, err := conn.Write(payload.Bytes())
+	_, err = conn.Write(payload.Bytes())
 	if err != nil {
 		return E.Cause(err, "write request")
 	}
@@ -244,7 +250,10 @@ func ClientHandshakePacket(conn net.Conn, key [KeyLength]byte, destination M.Soc
 	common.Must1(header.Write(key[:]))
 	common.Must1(header.Write(CRLF))
 	common.Must(header.WriteByte(CommandUDP))
-	common.Must(M.SocksaddrSerializer.WriteAddrPort(header, destination))
+	err := M.SocksaddrSerializer.WriteAddrPort(header, destination)
+	if err != nil {
+		return err
+	}
 	common.Must1(header.Write(CRLF))
 	common.Must(M.SocksaddrSerializer.WriteAddrPort(header, destination))
 	common.Must(binary.Write(header, binary.BigEndian, uint16(payloadLen)))
@@ -257,7 +266,7 @@ func ClientHandshakePacket(conn net.Conn, key [KeyLength]byte, destination M.Soc
 		}
 	}
 
-	_, err := conn.Write(payload.Bytes())
+	_, err = conn.Write(payload.Bytes())
 	if err != nil {
 		return E.Cause(err, "write payload")
 	}
@@ -289,10 +298,13 @@ func WritePacket(conn net.Conn, buffer *buf.Buffer, destination M.Socksaddr) err
 	defer buffer.Release()
 	bufferLen := buffer.Len()
 	header := buf.With(buffer.ExtendHeader(M.SocksaddrSerializer.AddrPortLen(destination) + 4))
-	common.Must(M.SocksaddrSerializer.WriteAddrPort(header, destination))
+	err := M.SocksaddrSerializer.WriteAddrPort(header, destination)
+	if err != nil {
+		return err
+	}
 	common.Must(binary.Write(header, binary.BigEndian, uint16(bufferLen)))
 	common.Must1(header.Write(CRLF))
-	_, err := conn.Write(buffer.Bytes())
+	_, err = conn.Write(buffer.Bytes())
 	if err != nil {
 		return E.Cause(err, "write packet")
 	}

transport/tuic/client.go

@@ -271,9 +271,13 @@ func (c *clientConn) Read(b []byte) (n int, err error) {
 func (c *clientConn) Write(b []byte) (n int, err error) {
 	if !c.requestWritten {
 		request := buf.NewSize(2 + addressSerializer.AddrPortLen(c.destination) + len(b))
+		defer request.Release()
 		request.WriteByte(Version)
 		request.WriteByte(CommandConnect)
-		addressSerializer.WriteAddrPort(request, c.destination)
+		err = addressSerializer.WriteAddrPort(request, c.destination)
+		if err != nil {
+			return
+		}
 		request.Write(b)
 		_, err = c.stream.Write(request.Bytes())
 		if err != nil {

transport/tuic/packet.go

@@ -17,6 +17,7 @@ import (
 	"github.com/sagernet/sing/common/atomic"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/cache"
+	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 )
 
@@ -205,6 +206,9 @@ func (c *udpPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr)
 	if buffer.Len() > 0xffff {
 		return quic.ErrMessageTooLarge(0xffff)
 	}
+	if !destination.IsValid() {
+		return E.New("invalid destination address")
+	}
 	packetId := c.packetId.Add(1)
 	if packetId > math.MaxUint16 {
 		c.packetId.Store(0)
@@ -246,6 +250,10 @@ func (c *udpPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
 	if len(p) > 0xffff {
 		return 0, quic.ErrMessageTooLarge(0xffff)
 	}
+	destination := M.SocksaddrFromNet(addr)
+	if !destination.IsValid() {
+		return 0, E.New("invalid destination address")
+	}
 	packetId := c.packetId.Add(1)
 	if packetId > math.MaxUint16 {
 		c.packetId.Store(0)
@@ -256,7 +264,7 @@ func (c *udpPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
 		sessionID:     c.sessionID,
 		packetID:      uint16(packetId),
 		fragmentTotal: 1,
-		destination:   M.SocksaddrFromNet(addr),
+		destination:   destination,
 		data:          buf.As(p),
 	}
 	if !c.udpStream && c.needFragment() && len(p) > c.udpMTU {

transport/vless/client.go

@@ -150,7 +150,10 @@ func (c *Conn) Write(b []byte) (n int, err error) {
 
 func (c *Conn) WriteBuffer(buffer *buf.Buffer) error {
 	if !c.requestWritten {
-		EncodeRequest(c.request, buf.With(buffer.ExtendHeader(RequestLen(c.request))))
+		err := EncodeRequest(c.request, buf.With(buffer.ExtendHeader(RequestLen(c.request))))
+		if err != nil {
+			return err
+		}
 		c.requestWritten = true
 	}
 	return c.ExtendedConn.WriteBuffer(buffer)
@@ -159,7 +162,11 @@ func (c *Conn) WriteBuffer(buffer *buf.Buffer) error {
 func (c *Conn) WriteVectorised(buffers []*buf.Buffer) error {
 	if !c.requestWritten {
 		buffer := buf.NewSize(RequestLen(c.request))
-		EncodeRequest(c.request, buffer)
+		err := EncodeRequest(c.request, buffer)
+		if err != nil {
+			buffer.Release()
+			return err
+		}
 		c.requestWritten = true
 		return c.writer.WriteVectorised(append([]*buf.Buffer{buffer}, buffers...))
 	}

transport/vless/protocol.go

@@ -156,14 +156,17 @@ func WriteRequest(writer io.Writer, request Request, payload []byte) error {
 	)
 
 	if request.Command != vmess.CommandMux {
-		common.Must(vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination))
+		err := vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination)
+		if err != nil {
+			return err
+		}
 	}
 
 	common.Must1(buffer.Write(payload))
 	return common.Error(writer.Write(buffer.Bytes()))
 }
 
-func EncodeRequest(request Request, buffer *buf.Buffer) {
+func EncodeRequest(request Request, buffer *buf.Buffer) error {
 	var requestLen int
 	requestLen += 1  // version
 	requestLen += 16 // uuid
@@ -195,8 +198,12 @@ func EncodeRequest(request Request, buffer *buf.Buffer) {
 	)
 
 	if request.Command != vmess.CommandMux {
-		common.Must(vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination))
+		err := vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination)
+		if err != nil {
+			return err
+		}
 	}
+	return nil
 }
 
 func RequestLen(request Request) int {
@@ -251,10 +258,12 @@ func WritePacketRequest(writer io.Writer, request Request, payload []byte) error
 		common.Must(common.Error(buffer.WriteString(request.Flow)))
 	}
 
-	common.Must(
+	common.Must(buffer.WriteByte(vmess.CommandUDP))
-		buffer.WriteByte(vmess.CommandUDP),
+
-		vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination),
+	err := vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination)
-	)
+	if err != nil {
+		return err
+	}
 
 	if len(payload) > 0 {
 		common.Must(