Merge pull request #1626 from libp2p/merge-circuit-v1

move go-libp2p-circuit here

go.mod

@@ -20,7 +20,6 @@ require (
 	github.com/libp2p/go-buffer-pool v0.0.2
 	github.com/libp2p/go-eventbus v0.2.1
 	github.com/libp2p/go-libp2p-asn-util v0.2.0
-	github.com/libp2p/go-libp2p-circuit v0.6.0
 	github.com/libp2p/go-libp2p-core v0.17.0
 	github.com/libp2p/go-libp2p-peerstore v0.7.0
 	github.com/libp2p/go-libp2p-resource-manager v0.3.0

go.sum

@@ -41,29 +41,15 @@ git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGy
 github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
-github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
-github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
-github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
-github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
-github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
-github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
-github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
-github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
-github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
 github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
@@ -71,7 +57,6 @@ github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
@@ -93,8 +78,6 @@ github.com/btcsuite/snappy-go v1.0.0/go.mod h1:8woku9dyThutzjeg+3xrA5iCpBRH8XEEg
 github.com/btcsuite/websocket v0.0.0-20150119174127-31079b680792/go.mod h1:ghJtEyQwv5/p4Mg4C0fgbePVuGr935/5ddU9Z3TmDRY=
 github.com/btcsuite/winsvc v1.0.0/go.mod h1:jsenWakMcC0zFBFurPLEAyrnc/teJEM1O46fmI40EZs=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
-github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
-github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
@@ -107,11 +90,8 @@ github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWR
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/cilium/ebpf v0.2.0/go.mod h1:To2CFviqOWL/M0gIMsvSMlqe7em/l1ALkX1PyjrX2Qs=
-github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
-github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/containerd/cgroups v0.0.0-20201119153540-4cbc285b3327 h1:7grrpcfCtbZLsjtB0DgMuzs1umsJmpzaHMZ6cO6iAWw=
 github.com/containerd/cgroups v0.0.0-20201119153540-4cbc285b3327/go.mod h1:ZJeTFisyysqgcCdecO57Dj79RfL0LNeGiFUqLYQRYLE=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
@@ -119,21 +99,17 @@ github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8Nz
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
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-github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d h1:t5Wuyh53qYyg9eqn4BbnlIT+vmhyww0TatL+zT3uWgI=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
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-github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
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 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davidlazar/go-crypto v0.0.0-20170701192655-dcfb0a7ac018/go.mod h1:rQYf4tfk5sSwFsnDg3qYaBxSjsD9S8+59vW0dKUgme4=
 github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c h1:pFUpOrbxDR6AkioZ1ySsx5yxlDQZ8stG2b88gTPxgJU=
 github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c/go.mod h1:6UhI8N9EjYm1c2odKpFpAYeR8dsBeM7PtzQhRgxRr9U=
 github.com/decred/dcrd/crypto/blake256 v1.0.0 h1:/8DMNYp9SGi5f0w7uCm6d6M4OU2rGFK09Y2A4Xv7EE0=
@@ -143,31 +119,21 @@ github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeC
 github.com/decred/dcrd/lru v1.0.0/go.mod h1:mxKOwFd7lFjN2GZYsiz/ecgqR6kkYAl+0pz0tEMk218=
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-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
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@@ -179,26 +145,21 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
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-github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
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@@ -259,7 +220,6 @@ github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hf
 github.com/google/pprof v0.0.0-20200430221834-fc25d7d30c6d/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/pprof v0.0.0-20200708004538-1a94d8640e99/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
-github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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@@ -267,52 +227,24 @@ github.com/googleapis/gax-go/v2 v2.0.3/go.mod h1:LLvjysVCY1JZeum8Z6l8qUty8fiNwE0
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-github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
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-github.com/gorilla/websocket v0.0.0-20170926233335-4201258b820c/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
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 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
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-github.com/influxdata/influxdb1-client v0.0.0-20191209144304-8bf82d3c094d/go.mod h1:qj24IKcXYK6Iy9ceXlo3Tc+vtHo9lIhSX5JddghvEPo=
 github.com/ipfs/go-cid v0.0.2/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
-github.com/ipfs/go-cid v0.0.3/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
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@@ -327,8 +259,6 @@ github.com/ipfs/go-ds-leveldb v0.5.0/go.mod h1:d3XG9RUDzQ6V4SHi8+Xgj9j1XuEk1z82l
 github.com/ipfs/go-ipfs-delay v0.0.0-20181109222059-70721b86a9a8/go.mod h1:8SP1YXK1M1kXuc4KJZINY3TQQ03J2rwBG9QfXmbRPrw=
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@@ -345,19 +275,14 @@ github.com/jbenet/goprocess v0.1.4/go.mod h1:5yspPrukOVuOLORacaBi858NqyClJPQxYZl
 github.com/jellevandenhooff/dkim v0.0.0-20150330215556-f50fe3d243e1/go.mod h1:E0B/fFc00Y+Rasa88328GlI/XbtyysCtTHZS8h7IrBU=
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 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
-github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
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@@ -366,7 +291,6 @@ github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQL
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
-github.com/klauspost/compress v1.13.6/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/klauspost/compress v1.15.1 h1:y9FcTHGyrebwfP0ZZqFiaxTaiDnUrGkJkI+f583BL1A=
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 github.com/klauspost/cpuid/v2 v2.0.4/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
@@ -390,8 +314,6 @@ github.com/libp2p/go-buffer-pool v0.0.2 h1:QNK2iAFa8gjAe1SPz6mHSMuCcjs+X1wlHzeOS
 github.com/libp2p/go-buffer-pool v0.0.2/go.mod h1:MvaB6xw5vOrDl8rYZGLFdKAuk/hRoRZd1Vi32+RXyFM=
 github.com/libp2p/go-cidranger v1.1.0 h1:ewPN8EZ0dd1LSnrtuwd4709PXVcITVeuwbag38yPW7c=
 github.com/libp2p/go-cidranger v1.1.0/go.mod h1:KWZTfSr+r9qEo9OkI9/SIEeAtw+NNoU0dXIXt15Okic=
-github.com/libp2p/go-conn-security-multistream v0.3.0 h1:9UCIKlBL1hC9u7nkMXpD1nkc/T53PKMAn3/k9ivBAVc=
-github.com/libp2p/go-conn-security-multistream v0.3.0/go.mod h1:EEP47t4fw/bTelVmEzIDqSe69hO/ip52xBEhZMLWAHM=
 github.com/libp2p/go-eventbus v0.2.1 h1:VanAdErQnpTioN2TowqNcOijf6YwhuODe4pPKSDpxGc=
 github.com/libp2p/go-eventbus v0.2.1/go.mod h1:jc2S4SoEVPP48H9Wpzm5aiGwUCBMfGhVhhBjyhhCJs8=
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@@ -399,46 +321,20 @@ github.com/libp2p/go-flow-metrics v0.0.3 h1:8tAs/hSdNvUiLgtlSy3mxwxWP4I9y/jlkPFT
 github.com/libp2p/go-flow-metrics v0.0.3/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
 github.com/libp2p/go-libp2p-asn-util v0.2.0 h1:rg3+Os8jbnO5DxkC7K/Utdi+DkY3q/d1/1q+8WeNAsw=
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@@ -448,65 +344,42 @@ github.com/libp2p/go-msgio v0.2.0/go.mod h1:dBVM1gW3Jk9XqHkU4eKdGvVHdLa51hoGfll6
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@@ -525,13 +398,7 @@ github.com/minio/sha256-simd v0.1.1-0.20190913151208-6de447530771/go.mod h1:B5e1
 github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM=
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@@ -550,21 +417,15 @@ github.com/multiformats/go-base36 v0.1.0/go.mod h1:kFGE83c6s80PklsHO9sRn2NCoffoR
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@@ -573,41 +434,26 @@ github.com/multiformats/go-multicodec v0.4.1/go.mod h1:1Hj/eHRaVWSXiSNNfcEPcwZle
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 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/procfs v0.7.3 h1:4jVXhlkAyzOScmCkXBTOLRLTz8EeU+eyjrwB/EPq0VU=
 github.com/prometheus/procfs v0.7.3/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
@@ -692,14 +506,9 @@ github.com/raulk/clock v1.1.0 h1:dpb29+UKMbLqiU/jqIJptgLR1nn23HLgMY0sTCDza5Y=
 github.com/raulk/clock v1.1.0/go.mod h1:3MpVxdZ/ODBQDxbN+kzshf5OSZwPjtMDx6BBXBmOeY0=
 github.com/raulk/go-watchdog v1.2.0 h1:konN75pw2BMmZ+AfuAm5rtFsWcJpKF3m02rKituuXNo=
 github.com/raulk/go-watchdog v1.2.0/go.mod h1:lzSbAl5sh4rtI8tYHU01BWIDzgzqaQLj6RcA1i4mlqI=
-github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
-github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
-github.com/samuel/go-zookeeper v0.0.0-20190923202752-2cc03de413da/go.mod h1:gi+0XIa01GRL2eRQVjQkKGqKF3SF9vZR/HnPullcV2E=
-github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
 github.com/shurcooL/component v0.0.0-20170202220835-f88ec8f54cc4/go.mod h1:XhFIlyj5a1fBNx5aJTbKoIq0mNaPvOagO+HjB3EtxrY=
 github.com/shurcooL/events v0.0.0-20181021180414-410e4ca65f48/go.mod h1:5u70Mqkb5O5cxEA8nxTsgrgLehJeAw6Oc4Ab1c/P1HM=
@@ -728,11 +537,7 @@ github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPx
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
-github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/smola/gocompat v0.2.0/go.mod h1:1B0MlxbmoZNo3h8guHp8HztB3BSYR5itql9qtVc0ypY=
-github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
-github.com/sony/gobreaker v0.4.1/go.mod h1:ZKptC7FHNvhBz7dN2LGjPVBz2sZJmc0/PkyDJOjmxWY=
 github.com/sourcegraph/annotate v0.0.0-20160123013949-f4cad6c6324d/go.mod h1:UdhH50NIW0fCiwBSr0co2m7BnFLdv4fQTgdqdJTHFeE=
 github.com/sourcegraph/syntaxhighlight v0.0.0-20170531221838-bd320f5d308e/go.mod h1:HuIsMU8RRBOtsCgI77wP899iHVBQpCmg4ErYMZB+2IA=
 github.com/spacemonkeygo/openssl v0.0.0-20181017203307-c2dcc5cca94a/go.mod h1:7AyxJNCJ7SBZ1MfVQCWD6Uqo2oubI2Eq2y2eqf+A5r0=
@@ -743,16 +548,11 @@ github.com/spaolacci/murmur3 v1.1.0 h1:7c1g84S4BPRrfL5Xrdp6fOJ206sU9y293DDHaoy0b
 github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
-github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3XqQ=
 github.com/spf13/cobra v0.0.5/go.mod h1:3K3wKZymM7VvHMDS9+Akkh4K60UwM26emMESw8tLCHU=
 github.com/spf13/jwalterweatherman v1.0.0/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
-github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/viper v1.3.2/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DMA2s=
 github.com/src-d/envconfig v1.0.0/go.mod h1:Q9YQZ7BKITldTBnoxsE5gOeB5y66RyPXeue/R4aaNBc=
-github.com/streadway/amqp v0.0.0-20190404075320-75d898a42a94/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
-github.com/streadway/amqp v0.0.0-20190827072141-edfb9018d271/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
-github.com/streadway/handy v0.0.0-20190108123426-d5acb3125c2a/go.mod h1:qNTQ5P5JnDBl6z3cMAg/SywNDC5ABu5ApDIw6lUbRmI=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
@@ -763,49 +563,33 @@ github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5Cc
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
 github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
-github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
-github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
-github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
 github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
-github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7 h1:E9S12nwJwEOXe2d6gT6qxdvqMnNq+VnSsKPgm2ZZNds=
-github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7/go.mod h1:X2c0RVCI1eSUFI8eLcY3c0423ykwiUdxLJtkDvruhjI=
 github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7VPsoEPHyzalCE06qoARUCeBBE=
-github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
-go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
-go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
-go.opencensus.io v0.20.2/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
-go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 go.uber.org/goleak v1.1.11-0.20210813005559-691160354723 h1:sHOAIxRGBp443oHZIPB+HsUGaksVCXVQENPxwTfQdH4=
 go.uber.org/goleak v1.1.11-0.20210813005559-691160354723/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
-go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
-go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
 go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
 go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
-go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
-go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
 go.uber.org/zap v1.14.1/go.mod h1:Mb2vm2krFEG5DV0W9qcHBYFtp/Wku1cvYaqPsS/WYfc=
 go.uber.org/zap v1.16.0/go.mod h1:MA8QOfq0BHJwdXa996Y4dYkAqRKB8/1K1QMMZVaNZjQ=
 go.uber.org/zap v1.19.1 h1:ue41HOKd1vGURxrmeKIgELGb3jPW9DMUDGtsinblHwI=
@@ -814,7 +598,6 @@ go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1
 golang.org/x/build v0.0.0-20190111050920-041ab4dc3f9d/go.mod h1:OWs+y06UdEOHN4y+MfF/py+xQ/tYqIWW03b70/CG9Rw=
 golang.org/x/crypto v0.0.0-20170930174604-9419663f5a44/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -825,7 +608,6 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190618222545-ea8f1a30c443/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -875,14 +657,10 @@ golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181011144130-49bb7cea24b1/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181029044818-c44066c5c816/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181106065722-10aee1819953/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190125091013-d26f9f9a57f3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190313220215-9f648a60d977/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -894,7 +672,6 @@ golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -913,7 +690,6 @@ golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210119194325-5f4716e94777/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210423184538-5f58ad60dda6/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
 golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
@@ -942,15 +718,11 @@ golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180810173357-98c5dad5d1a0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181029174526-d69651ed3497/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181122145206-62eef0e2fa9b/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190219092855-153ac476189d/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -966,15 +738,12 @@ golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191206220618-eeba5f6aabab/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191220142924-d4481acd189f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -998,13 +767,10 @@ golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20201214210602-f9fddec55a1e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210303074136-134d130e1a04/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210309074719-68d13333faf2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210317225723-c4fcb01b228e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210426080607-c94f62235c83/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1039,7 +805,6 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
@@ -1059,7 +824,6 @@ golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtn
 golang.org/x/tools v0.0.0-20191130070609-6e064ea0cf2d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191216173652-a0e659d51361/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20191227053925-7b8e75db28f4/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200117161641-43d50277825c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200122220014-bf1340f18c4a/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
@@ -1092,7 +856,6 @@ golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8T
 google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
-google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
@@ -1126,7 +889,6 @@ google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRn
 google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto v0.0.0-20190530194941-fb225487d101/go.mod h1:z3L6/3dTEVtUr6QSP8miRzeRqwQOioJ9I66odjN4I7s=
 google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
@@ -1155,19 +917,14 @@ google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmE
 google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
-google.golang.org/grpc v1.22.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.28.1/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
 google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
@@ -1192,18 +949,13 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
-gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
-gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/src-d/go-cli.v0 v0.0.0-20181105080154-d492247bbc0d/go.mod h1:z+K8VcOYVYcSwSjGebuDL6176A1XskgbtNl64NSg+n8=
 gopkg.in/src-d/go-log.v1 v1.0.1/go.mod h1:GN34hKP0g305ysm2/hctJ0Y8nWP3zxXXJ8GFabTyABE=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
-gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -1229,7 +981,5 @@ lukechampine.com/blake3 v1.1.6/go.mod h1:tkKEOtDkNtklkXtLNEOGNq5tcV90tJiA1vAA12R
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
 sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
 sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=

p2p/protocol/circuitv2/relay/compat_test.go

@@ -7,8 +7,8 @@ import (
 	"io"
 	"testing"
 
-	compatv1 "github.com/libp2p/go-libp2p-circuit"
 	relayv1 "github.com/libp2p/go-libp2p/p2p/protocol/circuitv1/relay"
+	compatv1 "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated"
 
 	"github.com/libp2p/go-libp2p-core/host"
 	"github.com/libp2p/go-libp2p-core/network"

p2p/protocol/internal/circuitv1-deprecated/conn.go

@@ -0,0 +1,124 @@
+package relay
+
+import (
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+
+	ma "github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+)
+
+// HopTagWeight is the connection manager weight for connections carrying relay hop streams
+var HopTagWeight = 5
+
+type Conn struct {
+	stream network.Stream
+	remote peer.AddrInfo
+	host   host.Host
+	relay  *Relay
+}
+
+type NetAddr struct {
+	Relay  string
+	Remote string
+}
+
+func (n *NetAddr) Network() string {
+	return "libp2p-circuit-relay"
+}
+
+func (n *NetAddr) String() string {
+	return fmt.Sprintf("relay[%s-%s]", n.Remote, n.Relay)
+}
+
+func (c *Conn) Close() error {
+	c.untagHop()
+	return c.stream.Reset()
+}
+
+func (c *Conn) Read(buf []byte) (int, error) {
+	return c.stream.Read(buf)
+}
+
+func (c *Conn) Write(buf []byte) (int, error) {
+	return c.stream.Write(buf)
+}
+
+func (c *Conn) SetDeadline(t time.Time) error {
+	return c.stream.SetDeadline(t)
+}
+
+func (c *Conn) SetReadDeadline(t time.Time) error {
+	return c.stream.SetReadDeadline(t)
+}
+
+func (c *Conn) SetWriteDeadline(t time.Time) error {
+	return c.stream.SetWriteDeadline(t)
+}
+
+func (c *Conn) RemoteAddr() net.Addr {
+	return &NetAddr{
+		Relay:  c.stream.Conn().RemotePeer().Pretty(),
+		Remote: c.remote.ID.Pretty(),
+	}
+}
+
+// Increment the underlying relay connection tag by 1, thus increasing its protection from
+// connection pruning. This ensures that connections to relays are not accidentally closed,
+// by the connection manager, taking with them all the relayed connections (that may themselves
+// be protected).
+func (c *Conn) tagHop() {
+	c.relay.mx.Lock()
+	defer c.relay.mx.Unlock()
+
+	p := c.stream.Conn().RemotePeer()
+	c.relay.hopCount[p]++
+	if c.relay.hopCount[p] == 1 {
+		c.host.ConnManager().TagPeer(p, "relay-hop-stream", HopTagWeight)
+	}
+}
+
+// Decrement the underlying relay connection tag by 1; this is performed when we close the
+// relayed connection.
+func (c *Conn) untagHop() {
+	c.relay.mx.Lock()
+	defer c.relay.mx.Unlock()
+
+	p := c.stream.Conn().RemotePeer()
+	c.relay.hopCount[p]--
+	if c.relay.hopCount[p] == 0 {
+		c.host.ConnManager().UntagPeer(p, "relay-hop-stream")
+		delete(c.relay.hopCount, p)
+	}
+}
+
+// TODO: is it okay to cast c.Conn().RemotePeer() into a multiaddr? might be "user input"
+func (c *Conn) RemoteMultiaddr() ma.Multiaddr {
+	// TODO: We should be able to do this directly without converting to/from a string.
+	relayAddr, err := ma.NewComponent(
+		ma.ProtocolWithCode(ma.P_P2P).Name,
+		c.stream.Conn().RemotePeer().Pretty(),
+	)
+	if err != nil {
+		panic(err)
+	}
+	return ma.Join(c.stream.Conn().RemoteMultiaddr(), relayAddr, circuitAddr)
+}
+
+func (c *Conn) LocalMultiaddr() ma.Multiaddr {
+	return c.stream.Conn().LocalMultiaddr()
+}
+
+func (c *Conn) LocalAddr() net.Addr {
+	na, err := manet.ToNetAddr(c.stream.Conn().LocalMultiaddr())
+	if err != nil {
+		log.Error("failed to convert local multiaddr to net addr:", err)
+		return nil
+	}
+	return na
+}

p2p/protocol/internal/circuitv1-deprecated/dial.go

@@ -0,0 +1,57 @@
+package relay
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/libp2p/go-libp2p-core/network"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/transport"
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+func (d *RelayTransport) Dial(ctx context.Context, a ma.Multiaddr, p peer.ID) (transport.CapableConn, error) {
+	c, err := d.Relay().Dial(ctx, a, p)
+	if err != nil {
+		return nil, err
+	}
+	c.tagHop()
+	scope, _ := network.NullResourceManager.OpenConnection(network.DirOutbound, false)
+	return d.upgrader.Upgrade(ctx, d, c, network.DirOutbound, p, scope)
+}
+
+func (r *Relay) Dial(ctx context.Context, a ma.Multiaddr, p peer.ID) (*Conn, error) {
+	// split /a/p2p-circuit/b into (/a, /p2p-circuit/b)
+	relayaddr, destaddr := ma.SplitFunc(a, func(c ma.Component) bool {
+		return c.Protocol().Code == ma.P_CIRCUIT
+	})
+
+	// If the address contained no /p2p-circuit part, the second part is nil.
+	if destaddr == nil {
+		return nil, fmt.Errorf("%s is not a relay address", a)
+	}
+
+	if relayaddr == nil {
+		return nil, fmt.Errorf(
+			"can't dial a p2p-circuit without specifying a relay: %s",
+			a,
+		)
+	}
+
+	// Strip the /p2p-circuit prefix from the destaddr.
+	_, destaddr = ma.SplitFirst(destaddr)
+
+	dinfo := &peer.AddrInfo{ID: p, Addrs: []ma.Multiaddr{}}
+	if destaddr != nil {
+		dinfo.Addrs = append(dinfo.Addrs, destaddr)
+	}
+
+	var rinfo *peer.AddrInfo
+	rinfo, err := peer.AddrInfoFromP2pAddr(relayaddr)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing multiaddr '%s': %s", relayaddr.String(), err)
+	}
+
+	return r.DialPeer(ctx, *rinfo, *dinfo)
+}

p2p/protocol/internal/circuitv1-deprecated/listen.go

@@ -0,0 +1,61 @@
+package relay
+
+import (
+	"net"
+
+	pb "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated/pb"
+
+	ma "github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+)
+
+var _ manet.Listener = (*RelayListener)(nil)
+
+type RelayListener Relay
+
+func (l *RelayListener) Relay() *Relay {
+	return (*Relay)(l)
+}
+
+func (r *Relay) Listener() *RelayListener {
+	// TODO: Only allow one!
+	return (*RelayListener)(r)
+}
+
+func (l *RelayListener) Accept() (manet.Conn, error) {
+	for {
+		select {
+		case c := <-l.incoming:
+			err := l.Relay().writeResponse(c.stream, pb.CircuitRelay_SUCCESS)
+			if err != nil {
+				log.Debugf("error writing relay response: %s", err.Error())
+				c.stream.Reset()
+				continue
+			}
+
+			// TODO: Pretty print.
+			log.Infof("accepted relay connection: %q", c)
+
+			c.tagHop()
+			return c, nil
+		case <-l.ctx.Done():
+			return nil, l.ctx.Err()
+		}
+	}
+}
+
+func (l *RelayListener) Addr() net.Addr {
+	return &NetAddr{
+		Relay:  "any",
+		Remote: "any",
+	}
+}
+
+func (l *RelayListener) Multiaddr() ma.Multiaddr {
+	return circuitAddr
+}
+
+func (l *RelayListener) Close() error {
+	// TODO: noop?
+	return nil
+}

p2p/protocol/internal/circuitv1-deprecated/pb/Makefile

@@ -0,0 +1,11 @@
+PB = $(wildcard *.proto)
+GO = $(PB:.proto=.pb.go)
+
+all: $(GO)
+
+%.pb.go: %.proto
+		protoc --proto_path=$(GOPATH)/src:. --gogofast_out=. $<
+
+clean:
+		rm -f *.pb.go
+		rm -f *.go

p2p/protocol/internal/circuitv1-deprecated/pb/relay.pb.go

@@ -0,0 +1,868 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: relay.proto
+
+package relay_pb
+
+import (
+	fmt "fmt"
+	github_com_gogo_protobuf_proto "github.com/gogo/protobuf/proto"
+	proto "github.com/gogo/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+type CircuitRelay_Status int32
+
+const (
+	CircuitRelay_SUCCESS                    CircuitRelay_Status = 100
+	CircuitRelay_HOP_SRC_ADDR_TOO_LONG      CircuitRelay_Status = 220
+	CircuitRelay_HOP_DST_ADDR_TOO_LONG      CircuitRelay_Status = 221
+	CircuitRelay_HOP_SRC_MULTIADDR_INVALID  CircuitRelay_Status = 250
+	CircuitRelay_HOP_DST_MULTIADDR_INVALID  CircuitRelay_Status = 251
+	CircuitRelay_HOP_NO_CONN_TO_DST         CircuitRelay_Status = 260
+	CircuitRelay_HOP_CANT_DIAL_DST          CircuitRelay_Status = 261
+	CircuitRelay_HOP_CANT_OPEN_DST_STREAM   CircuitRelay_Status = 262
+	CircuitRelay_HOP_CANT_SPEAK_RELAY       CircuitRelay_Status = 270
+	CircuitRelay_HOP_CANT_RELAY_TO_SELF     CircuitRelay_Status = 280
+	CircuitRelay_STOP_SRC_ADDR_TOO_LONG     CircuitRelay_Status = 320
+	CircuitRelay_STOP_DST_ADDR_TOO_LONG     CircuitRelay_Status = 321
+	CircuitRelay_STOP_SRC_MULTIADDR_INVALID CircuitRelay_Status = 350
+	CircuitRelay_STOP_DST_MULTIADDR_INVALID CircuitRelay_Status = 351
+	CircuitRelay_STOP_RELAY_REFUSED         CircuitRelay_Status = 390
+	CircuitRelay_MALFORMED_MESSAGE          CircuitRelay_Status = 400
+)
+
+var CircuitRelay_Status_name = map[int32]string{
+	100: "SUCCESS",
+	220: "HOP_SRC_ADDR_TOO_LONG",
+	221: "HOP_DST_ADDR_TOO_LONG",
+	250: "HOP_SRC_MULTIADDR_INVALID",
+	251: "HOP_DST_MULTIADDR_INVALID",
+	260: "HOP_NO_CONN_TO_DST",
+	261: "HOP_CANT_DIAL_DST",
+	262: "HOP_CANT_OPEN_DST_STREAM",
+	270: "HOP_CANT_SPEAK_RELAY",
+	280: "HOP_CANT_RELAY_TO_SELF",
+	320: "STOP_SRC_ADDR_TOO_LONG",
+	321: "STOP_DST_ADDR_TOO_LONG",
+	350: "STOP_SRC_MULTIADDR_INVALID",
+	351: "STOP_DST_MULTIADDR_INVALID",
+	390: "STOP_RELAY_REFUSED",
+	400: "MALFORMED_MESSAGE",
+}
+
+var CircuitRelay_Status_value = map[string]int32{
+	"SUCCESS":                    100,
+	"HOP_SRC_ADDR_TOO_LONG":      220,
+	"HOP_DST_ADDR_TOO_LONG":      221,
+	"HOP_SRC_MULTIADDR_INVALID":  250,
+	"HOP_DST_MULTIADDR_INVALID":  251,
+	"HOP_NO_CONN_TO_DST":         260,
+	"HOP_CANT_DIAL_DST":          261,
+	"HOP_CANT_OPEN_DST_STREAM":   262,
+	"HOP_CANT_SPEAK_RELAY":       270,
+	"HOP_CANT_RELAY_TO_SELF":     280,
+	"STOP_SRC_ADDR_TOO_LONG":     320,
+	"STOP_DST_ADDR_TOO_LONG":     321,
+	"STOP_SRC_MULTIADDR_INVALID": 350,
+	"STOP_DST_MULTIADDR_INVALID": 351,
+	"STOP_RELAY_REFUSED":         390,
+	"MALFORMED_MESSAGE":          400,
+}
+
+func (x CircuitRelay_Status) Enum() *CircuitRelay_Status {
+	p := new(CircuitRelay_Status)
+	*p = x
+	return p
+}
+
+func (x CircuitRelay_Status) String() string {
+	return proto.EnumName(CircuitRelay_Status_name, int32(x))
+}
+
+func (x *CircuitRelay_Status) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(CircuitRelay_Status_value, data, "CircuitRelay_Status")
+	if err != nil {
+		return err
+	}
+	*x = CircuitRelay_Status(value)
+	return nil
+}
+
+func (CircuitRelay_Status) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_9f69a7d5a802d584, []int{0, 0}
+}
+
+type CircuitRelay_Type int32
+
+const (
+	CircuitRelay_HOP     CircuitRelay_Type = 1
+	CircuitRelay_STOP    CircuitRelay_Type = 2
+	CircuitRelay_STATUS  CircuitRelay_Type = 3
+	CircuitRelay_CAN_HOP CircuitRelay_Type = 4
+)
+
+var CircuitRelay_Type_name = map[int32]string{
+	1: "HOP",
+	2: "STOP",
+	3: "STATUS",
+	4: "CAN_HOP",
+}
+
+var CircuitRelay_Type_value = map[string]int32{
+	"HOP":     1,
+	"STOP":    2,
+	"STATUS":  3,
+	"CAN_HOP": 4,
+}
+
+func (x CircuitRelay_Type) Enum() *CircuitRelay_Type {
+	p := new(CircuitRelay_Type)
+	*p = x
+	return p
+}
+
+func (x CircuitRelay_Type) String() string {
+	return proto.EnumName(CircuitRelay_Type_name, int32(x))
+}
+
+func (x *CircuitRelay_Type) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(CircuitRelay_Type_value, data, "CircuitRelay_Type")
+	if err != nil {
+		return err
+	}
+	*x = CircuitRelay_Type(value)
+	return nil
+}
+
+func (CircuitRelay_Type) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_9f69a7d5a802d584, []int{0, 1}
+}
+
+type CircuitRelay struct {
+	Type                 *CircuitRelay_Type   `protobuf:"varint,1,opt,name=type,enum=relay.pb.CircuitRelay_Type" json:"type,omitempty"`
+	SrcPeer              *CircuitRelay_Peer   `protobuf:"bytes,2,opt,name=srcPeer" json:"srcPeer,omitempty"`
+	DstPeer              *CircuitRelay_Peer   `protobuf:"bytes,3,opt,name=dstPeer" json:"dstPeer,omitempty"`
+	Code                 *CircuitRelay_Status `protobuf:"varint,4,opt,name=code,enum=relay.pb.CircuitRelay_Status" json:"code,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *CircuitRelay) Reset()         { *m = CircuitRelay{} }
+func (m *CircuitRelay) String() string { return proto.CompactTextString(m) }
+func (*CircuitRelay) ProtoMessage()    {}
+func (*CircuitRelay) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9f69a7d5a802d584, []int{0}
+}
+func (m *CircuitRelay) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *CircuitRelay) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_CircuitRelay.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *CircuitRelay) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CircuitRelay.Merge(m, src)
+}
+func (m *CircuitRelay) XXX_Size() int {
+	return m.Size()
+}
+func (m *CircuitRelay) XXX_DiscardUnknown() {
+	xxx_messageInfo_CircuitRelay.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CircuitRelay proto.InternalMessageInfo
+
+func (m *CircuitRelay) GetType() CircuitRelay_Type {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return CircuitRelay_HOP
+}
+
+func (m *CircuitRelay) GetSrcPeer() *CircuitRelay_Peer {
+	if m != nil {
+		return m.SrcPeer
+	}
+	return nil
+}
+
+func (m *CircuitRelay) GetDstPeer() *CircuitRelay_Peer {
+	if m != nil {
+		return m.DstPeer
+	}
+	return nil
+}
+
+func (m *CircuitRelay) GetCode() CircuitRelay_Status {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return CircuitRelay_SUCCESS
+}
+
+type CircuitRelay_Peer struct {
+	Id                   []byte   `protobuf:"bytes,1,req,name=id" json:"id,omitempty"`
+	Addrs                [][]byte `protobuf:"bytes,2,rep,name=addrs" json:"addrs,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *CircuitRelay_Peer) Reset()         { *m = CircuitRelay_Peer{} }
+func (m *CircuitRelay_Peer) String() string { return proto.CompactTextString(m) }
+func (*CircuitRelay_Peer) ProtoMessage()    {}
+func (*CircuitRelay_Peer) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9f69a7d5a802d584, []int{0, 0}
+}
+func (m *CircuitRelay_Peer) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *CircuitRelay_Peer) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_CircuitRelay_Peer.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *CircuitRelay_Peer) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CircuitRelay_Peer.Merge(m, src)
+}
+func (m *CircuitRelay_Peer) XXX_Size() int {
+	return m.Size()
+}
+func (m *CircuitRelay_Peer) XXX_DiscardUnknown() {
+	xxx_messageInfo_CircuitRelay_Peer.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CircuitRelay_Peer proto.InternalMessageInfo
+
+func (m *CircuitRelay_Peer) GetId() []byte {
+	if m != nil {
+		return m.Id
+	}
+	return nil
+}
+
+func (m *CircuitRelay_Peer) GetAddrs() [][]byte {
+	if m != nil {
+		return m.Addrs
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterEnum("relay.pb.CircuitRelay_Status", CircuitRelay_Status_name, CircuitRelay_Status_value)
+	proto.RegisterEnum("relay.pb.CircuitRelay_Type", CircuitRelay_Type_name, CircuitRelay_Type_value)
+	proto.RegisterType((*CircuitRelay)(nil), "relay.pb.CircuitRelay")
+	proto.RegisterType((*CircuitRelay_Peer)(nil), "relay.pb.CircuitRelay.Peer")
+}
+
+func init() { proto.RegisterFile("relay.proto", fileDescriptor_9f69a7d5a802d584) }
+
+var fileDescriptor_9f69a7d5a802d584 = []byte{
+	// 473 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x92, 0x4f, 0x6f, 0xd3, 0x3e,
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+	0x45, 0x4a, 0xff, 0x95, 0x7d, 0x45, 0xb4, 0x0d, 0x47, 0x5b, 0x6f, 0x34, 0x8e, 0xf5, 0xd0, 0x01,
+	0xc3, 0xe4, 0x29, 0x8b, 0x87, 0x11, 0xf9, 0x59, 0xe5, 0xd6, 0xdd, 0xcd, 0x7f, 0x21, 0x7a, 0x17,
+	0xa8, 0xcd, 0x13, 0x61, 0x42, 0x91, 0x24, 0x46, 0x0b, 0x8b, 0x92, 0x97, 0x98, 0x1e, 0xc2, 0xff,
+	0x36, 0x08, 0x59, 0xa2, 0x4d, 0x34, 0x64, 0xb1, 0x9b, 0xbf, 0xc2, 0xf4, 0x04, 0x82, 0x6a, 0x2e,
+	0x52, 0x9e, 0xb8, 0xab, 0x95, 0x96, 0x9c, 0x8d, 0xc8, 0x25, 0xa6, 0x47, 0x70, 0x50, 0xc5, 0x2a,
+	0xe5, 0xec, 0x89, 0x91, 0x3c, 0x66, 0xcf, 0xc8, 0x1b, 0x4c, 0x8f, 0xe1, 0xb0, 0x8a, 0xdc, 0xd0,
+	0x3e, 0x4d, 0xf1, 0x78, 0x40, 0xde, 0xb9, 0x50, 0xe9, 0x1b, 0x0b, 0x78, 0x7f, 0x1d, 0xee, 0x36,
+	0xf0, 0x01, 0xd3, 0x7b, 0xd0, 0xaa, 0xcc, 0xdd, 0x57, 0xfc, 0x76, 0x0d, 0xdc, 0xdc, 0xc1, 0x77,
+	0x6c, 0x3b, 0x70, 0xc0, 0x66, 0x29, 0xc9, 0x07, 0x63, 0xc5, 0x23, 0x72, 0xe9, 0xd9, 0x0e, 0x46,
+	0x2c, 0x1e, 0x08, 0x39, 0xe2, 0x91, 0x19, 0x71, 0xa5, 0xd8, 0x19, 0x27, 0x6f, 0xbd, 0xee, 0x29,
+	0xf8, 0xf6, 0x0f, 0xa5, 0x75, 0xf0, 0xce, 0x45, 0x4a, 0x10, 0xdd, 0x03, 0xdf, 0xde, 0x40, 0x30,
+	0x05, 0xa8, 0x29, 0xcd, 0xf4, 0x58, 0x11, 0xcf, 0x7e, 0xe0, 0x90, 0x25, 0xc6, 0x22, 0xfe, 0xe3,
+	0xe6, 0xa7, 0x75, 0x1b, 0x7d, 0x5e, 0xb7, 0xd1, 0x8f, 0x75, 0x1b, 0xfd, 0x0e, 0x00, 0x00, 0xff,
+	0xff, 0x6b, 0x22, 0x33, 0xbb, 0x2f, 0x03, 0x00, 0x00,
+}
+
+func (m *CircuitRelay) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *CircuitRelay) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *CircuitRelay) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if m.Code != nil {
+		i = encodeVarintRelay(dAtA, i, uint64(*m.Code))
+		i--
+		dAtA[i] = 0x20
+	}
+	if m.DstPeer != nil {
+		{
+			size, err := m.DstPeer.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintRelay(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x1a
+	}
+	if m.SrcPeer != nil {
+		{
+			size, err := m.SrcPeer.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintRelay(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x12
+	}
+	if m.Type != nil {
+		i = encodeVarintRelay(dAtA, i, uint64(*m.Type))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *CircuitRelay_Peer) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *CircuitRelay_Peer) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *CircuitRelay_Peer) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if len(m.Addrs) > 0 {
+		for iNdEx := len(m.Addrs) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.Addrs[iNdEx])
+			copy(dAtA[i:], m.Addrs[iNdEx])
+			i = encodeVarintRelay(dAtA, i, uint64(len(m.Addrs[iNdEx])))
+			i--
+			dAtA[i] = 0x12
+		}
+	}
+	if m.Id == nil {
+		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("id")
+	} else {
+		i -= len(m.Id)
+		copy(dAtA[i:], m.Id)
+		i = encodeVarintRelay(dAtA, i, uint64(len(m.Id)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintRelay(dAtA []byte, offset int, v uint64) int {
+	offset -= sovRelay(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *CircuitRelay) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Type != nil {
+		n += 1 + sovRelay(uint64(*m.Type))
+	}
+	if m.SrcPeer != nil {
+		l = m.SrcPeer.Size()
+		n += 1 + l + sovRelay(uint64(l))
+	}
+	if m.DstPeer != nil {
+		l = m.DstPeer.Size()
+		n += 1 + l + sovRelay(uint64(l))
+	}
+	if m.Code != nil {
+		n += 1 + sovRelay(uint64(*m.Code))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *CircuitRelay_Peer) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Id != nil {
+		l = len(m.Id)
+		n += 1 + l + sovRelay(uint64(l))
+	}
+	if len(m.Addrs) > 0 {
+		for _, b := range m.Addrs {
+			l = len(b)
+			n += 1 + l + sovRelay(uint64(l))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func sovRelay(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozRelay(x uint64) (n int) {
+	return sovRelay(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *CircuitRelay) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowRelay
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: CircuitRelay: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: CircuitRelay: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
+			}
+			var v CircuitRelay_Type
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= CircuitRelay_Type(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Type = &v
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SrcPeer", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthRelay
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.SrcPeer == nil {
+				m.SrcPeer = &CircuitRelay_Peer{}
+			}
+			if err := m.SrcPeer.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field DstPeer", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthRelay
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.DstPeer == nil {
+				m.DstPeer = &CircuitRelay_Peer{}
+			}
+			if err := m.DstPeer.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Code", wireType)
+			}
+			var v CircuitRelay_Status
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= CircuitRelay_Status(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Code = &v
+		default:
+			iNdEx = preIndex
+			skippy, err := skipRelay(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *CircuitRelay_Peer) Unmarshal(dAtA []byte) error {
+	var hasFields [1]uint64
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowRelay
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: Peer: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: Peer: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Id", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthRelay
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Id = append(m.Id[:0], dAtA[iNdEx:postIndex]...)
+			if m.Id == nil {
+				m.Id = []byte{}
+			}
+			iNdEx = postIndex
+			hasFields[0] |= uint64(0x00000001)
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Addrs", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthRelay
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Addrs = append(m.Addrs, make([]byte, postIndex-iNdEx))
+			copy(m.Addrs[len(m.Addrs)-1], dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipRelay(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthRelay
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+	if hasFields[0]&uint64(0x00000001) == 0 {
+		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("id")
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipRelay(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowRelay
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowRelay
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthRelay
+			}
+			iNdEx += length
+			if iNdEx < 0 {
+				return 0, ErrInvalidLengthRelay
+			}
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupRelay
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthRelay        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowRelay          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupRelay = fmt.Errorf("proto: unexpected end of group")
+)

p2p/protocol/internal/circuitv1-deprecated/pb/relay.proto

@@ -0,0 +1,44 @@
+syntax = "proto2";
+
+package relay.pb;
+
+message CircuitRelay {
+
+  enum Status {
+    SUCCESS                    = 100;
+    HOP_SRC_ADDR_TOO_LONG      = 220;
+    HOP_DST_ADDR_TOO_LONG      = 221;
+    HOP_SRC_MULTIADDR_INVALID  = 250;
+    HOP_DST_MULTIADDR_INVALID  = 251;
+    HOP_NO_CONN_TO_DST         = 260;
+    HOP_CANT_DIAL_DST          = 261;
+    HOP_CANT_OPEN_DST_STREAM   = 262;
+    HOP_CANT_SPEAK_RELAY       = 270;
+    HOP_CANT_RELAY_TO_SELF     = 280;
+    STOP_SRC_ADDR_TOO_LONG     = 320;
+    STOP_DST_ADDR_TOO_LONG     = 321;
+    STOP_SRC_MULTIADDR_INVALID = 350;
+    STOP_DST_MULTIADDR_INVALID = 351;
+    STOP_RELAY_REFUSED         = 390;
+    MALFORMED_MESSAGE          = 400;
+  }
+
+  enum Type {                 // RPC identifier, either HOP, STOP or STATUS
+    HOP     = 1;
+    STOP    = 2;
+    STATUS  = 3;
+    CAN_HOP = 4;
+  }
+
+  message Peer {
+    required bytes id = 1;    // peer id
+    repeated bytes addrs = 2; // peer's known addresses
+  }
+
+  optional Type type = 1;     // Type of the message
+
+  optional Peer srcPeer = 2;  // srcPeer and dstPeer are used when Type is HOP or STOP
+  optional Peer dstPeer = 3;
+
+  optional Status code = 4;   // Status code, used when Type is STATUS
+}

p2p/protocol/internal/circuitv1-deprecated/relay.go

@@ -0,0 +1,507 @@
+package relay
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	pb "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated/pb"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/peerstore"
+	"github.com/libp2p/go-libp2p-core/transport"
+
+	pool "github.com/libp2p/go-buffer-pool"
+
+	logging "github.com/ipfs/go-log/v2"
+
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+var log = logging.Logger("relay")
+
+const ProtoID = "/libp2p/circuit/relay/0.1.0"
+
+const maxMessageSize = 4096
+
+var (
+	RelayAcceptTimeout   = 10 * time.Second
+	HopConnectTimeout    = 30 * time.Second
+	StopHandshakeTimeout = 1 * time.Minute
+
+	HopStreamBufferSize = 4096
+	HopStreamLimit      = 1 << 19 // 512K hops for 1M goroutines
+
+	streamTimeout = 1 * time.Minute
+)
+
+// Relay is the relay transport and service.
+type Relay struct {
+	host      host.Host
+	upgrader  transport.Upgrader
+	ctx       context.Context
+	ctxCancel context.CancelFunc
+	self      peer.ID
+
+	active bool
+	hop    bool
+
+	incoming chan *Conn
+
+	// atomic counters
+	streamCount  int32
+	liveHopCount int32
+
+	// per peer hop counters
+	mx       sync.Mutex
+	hopCount map[peer.ID]int
+}
+
+// RelayOpts are options for configuring the relay transport.
+type RelayOpt int
+
+var (
+	// OptActive configures the relay transport to actively establish
+	// outbound connections on behalf of clients. You probably don't want to
+	// enable this unless you know what you're doing.
+	OptActive = RelayOpt(0)
+	// OptHop configures the relay transport to accept requests to relay
+	// traffic on behalf of third-parties. Unless OptActive is specified,
+	// this will only relay traffic between peers already connected to this
+	// node.
+	OptHop = RelayOpt(1)
+	// OptDiscovery is a no-op. It was introduced as a way to probe new
+	// peers to see if they were willing to act as a relays. However, in
+	// practice, it's useless. While it does test to see if these peers are
+	// relays, it doesn't (and can't), check to see if these peers are
+	// _active_ relays (i.e., will actively dial the target peer).
+	//
+	// This option may be re-enabled in the future but for now you shouldn't
+	// use it.
+	OptDiscovery = RelayOpt(2)
+)
+
+type RelayError struct {
+	Code pb.CircuitRelay_Status
+}
+
+func (e RelayError) Error() string {
+	return fmt.Sprintf("error opening relay circuit: %s (%d)", pb.CircuitRelay_Status_name[int32(e.Code)], e.Code)
+}
+
+// NewRelay constructs a new relay.
+func NewRelay(h host.Host, upgrader transport.Upgrader, opts ...RelayOpt) (*Relay, error) {
+	r := &Relay{
+		upgrader: upgrader,
+		host:     h,
+		self:     h.ID(),
+		incoming: make(chan *Conn),
+		hopCount: make(map[peer.ID]int),
+	}
+	r.ctx, r.ctxCancel = context.WithCancel(context.Background())
+
+	for _, opt := range opts {
+		switch opt {
+		case OptActive:
+			r.active = true
+		case OptHop:
+			r.hop = true
+		case OptDiscovery:
+			log.Errorf(
+				"circuit.OptDiscovery is now a no-op: %s",
+				"dialing peers with a random relay is no longer supported",
+			)
+		default:
+			return nil, fmt.Errorf("unrecognized option: %d", opt)
+		}
+	}
+
+	h.SetStreamHandler(ProtoID, r.handleNewStream)
+
+	return r, nil
+}
+
+// Increment the live hop count and increment the connection manager tags by 1 for the two
+// sides of the hop stream. This ensures that connections with many hop streams will be protected
+// from pruning, thus minimizing disruption from connection trimming in a relay node.
+func (r *Relay) addLiveHop(from, to peer.ID) {
+	atomic.AddInt32(&r.liveHopCount, 1)
+	r.host.ConnManager().UpsertTag(from, "relay-hop-stream", incrementTag)
+	r.host.ConnManager().UpsertTag(to, "relay-hop-stream", incrementTag)
+}
+
+// Decrement the live hpo count and decrement the connection manager tags for the two sides
+// of the hop stream.
+func (r *Relay) rmLiveHop(from, to peer.ID) {
+	atomic.AddInt32(&r.liveHopCount, -1)
+	r.host.ConnManager().UpsertTag(from, "relay-hop-stream", decrementTag)
+	r.host.ConnManager().UpsertTag(to, "relay-hop-stream", decrementTag)
+
+}
+
+func (r *Relay) GetActiveHops() int32 {
+	return atomic.LoadInt32(&r.liveHopCount)
+}
+
+func (r *Relay) DialPeer(ctx context.Context, relay peer.AddrInfo, dest peer.AddrInfo) (*Conn, error) {
+
+	log.Debugf("dialing peer %s through relay %s", dest.ID, relay.ID)
+
+	if len(relay.Addrs) > 0 {
+		r.host.Peerstore().AddAddrs(relay.ID, relay.Addrs, peerstore.TempAddrTTL)
+	}
+
+	s, err := r.host.NewStream(ctx, relay.ID, ProtoID)
+	if err != nil {
+		return nil, err
+	}
+
+	rd := newDelimitedReader(s, maxMessageSize)
+	wr := newDelimitedWriter(s)
+	defer rd.Close()
+
+	var msg pb.CircuitRelay
+
+	msg.Type = pb.CircuitRelay_HOP.Enum()
+	msg.SrcPeer = peerInfoToPeer(r.host.Peerstore().PeerInfo(r.self))
+	msg.DstPeer = peerInfoToPeer(dest)
+
+	err = wr.WriteMsg(&msg)
+	if err != nil {
+		s.Reset()
+		return nil, err
+	}
+
+	msg.Reset()
+
+	err = rd.ReadMsg(&msg)
+	if err != nil {
+		s.Reset()
+		return nil, err
+	}
+
+	if msg.GetType() != pb.CircuitRelay_STATUS {
+		s.Reset()
+		return nil, fmt.Errorf("unexpected relay response; not a status message (%d)", msg.GetType())
+	}
+
+	if msg.GetCode() != pb.CircuitRelay_SUCCESS {
+		s.Reset()
+		return nil, RelayError{msg.GetCode()}
+	}
+
+	return &Conn{stream: s, remote: dest, host: r.host, relay: r}, nil
+}
+
+func (r *Relay) Matches(addr ma.Multiaddr) bool {
+	// TODO: Look at the prefix transport as well.
+	_, err := addr.ValueForProtocol(ma.P_CIRCUIT)
+	return err == nil
+}
+
+// Queries a peer for support of hop relay
+func CanHop(ctx context.Context, host host.Host, id peer.ID) (bool, error) {
+	s, err := host.NewStream(ctx, id, ProtoID)
+	if err != nil {
+		return false, err
+	}
+	defer s.Close()
+
+	rd := newDelimitedReader(s, maxMessageSize)
+	wr := newDelimitedWriter(s)
+	defer rd.Close()
+
+	var msg pb.CircuitRelay
+
+	msg.Type = pb.CircuitRelay_CAN_HOP.Enum()
+
+	if err := wr.WriteMsg(&msg); err != nil {
+		s.Reset()
+		return false, err
+	}
+
+	msg.Reset()
+
+	if err := rd.ReadMsg(&msg); err != nil {
+		s.Reset()
+		return false, err
+	}
+
+	if msg.GetType() != pb.CircuitRelay_STATUS {
+		return false, fmt.Errorf("unexpected relay response; not a status message (%d)", msg.GetType())
+	}
+
+	return msg.GetCode() == pb.CircuitRelay_SUCCESS, nil
+}
+
+func (r *Relay) CanHop(ctx context.Context, id peer.ID) (bool, error) {
+	return CanHop(ctx, r.host, id)
+}
+
+func (r *Relay) handleNewStream(s network.Stream) {
+	s.SetReadDeadline(time.Now().Add(streamTimeout))
+
+	log.Infof("new relay stream from: %s", s.Conn().RemotePeer())
+
+	rd := newDelimitedReader(s, maxMessageSize)
+	defer rd.Close()
+
+	var msg pb.CircuitRelay
+
+	err := rd.ReadMsg(&msg)
+	if err != nil {
+		r.handleError(s, pb.CircuitRelay_MALFORMED_MESSAGE)
+		return
+	}
+	// reset stream deadline as message has been read
+	s.SetReadDeadline(time.Time{})
+
+	switch msg.GetType() {
+	case pb.CircuitRelay_HOP:
+		r.handleHopStream(s, &msg)
+	case pb.CircuitRelay_STOP:
+		r.handleStopStream(s, &msg)
+	case pb.CircuitRelay_CAN_HOP:
+		r.handleCanHop(s, &msg)
+	default:
+		log.Warnf("unexpected relay handshake: %d", msg.GetType())
+		r.handleError(s, pb.CircuitRelay_MALFORMED_MESSAGE)
+	}
+}
+
+func (r *Relay) handleHopStream(s network.Stream, msg *pb.CircuitRelay) {
+	if !r.hop {
+		r.handleError(s, pb.CircuitRelay_HOP_CANT_SPEAK_RELAY)
+		return
+	}
+
+	streamCount := atomic.AddInt32(&r.streamCount, 1)
+	liveHopCount := atomic.LoadInt32(&r.liveHopCount)
+	defer atomic.AddInt32(&r.streamCount, -1)
+
+	if (streamCount + liveHopCount) > int32(HopStreamLimit) {
+		log.Warn("hop stream limit exceeded; resetting stream")
+		s.Reset()
+		return
+	}
+
+	src, err := peerToPeerInfo(msg.GetSrcPeer())
+	if err != nil {
+		r.handleError(s, pb.CircuitRelay_HOP_SRC_MULTIADDR_INVALID)
+		return
+	}
+
+	if src.ID != s.Conn().RemotePeer() {
+		r.handleError(s, pb.CircuitRelay_HOP_SRC_MULTIADDR_INVALID)
+		return
+	}
+
+	dst, err := peerToPeerInfo(msg.GetDstPeer())
+	if err != nil {
+		r.handleError(s, pb.CircuitRelay_HOP_DST_MULTIADDR_INVALID)
+		return
+	}
+
+	if dst.ID == r.self {
+		r.handleError(s, pb.CircuitRelay_HOP_CANT_RELAY_TO_SELF)
+		return
+	}
+
+	// open stream
+	ctx, cancel := context.WithTimeout(r.ctx, HopConnectTimeout)
+	defer cancel()
+
+	if !r.active {
+		ctx = network.WithNoDial(ctx, "relay hop")
+	} else if len(dst.Addrs) > 0 {
+		r.host.Peerstore().AddAddrs(dst.ID, dst.Addrs, peerstore.TempAddrTTL)
+	}
+
+	bs, err := r.host.NewStream(ctx, dst.ID, ProtoID)
+	if err != nil {
+		log.Debugf("error opening relay stream to %s: %s", dst.ID.Pretty(), err.Error())
+		if err == network.ErrNoConn {
+			r.handleError(s, pb.CircuitRelay_HOP_NO_CONN_TO_DST)
+		} else {
+			r.handleError(s, pb.CircuitRelay_HOP_CANT_DIAL_DST)
+		}
+		return
+	}
+
+	// stop handshake
+	rd := newDelimitedReader(bs, maxMessageSize)
+	wr := newDelimitedWriter(bs)
+	defer rd.Close()
+
+	// set handshake deadline
+	bs.SetDeadline(time.Now().Add(StopHandshakeTimeout))
+
+	msg.Type = pb.CircuitRelay_STOP.Enum()
+
+	err = wr.WriteMsg(msg)
+	if err != nil {
+		log.Debugf("error writing stop handshake: %s", err.Error())
+		bs.Reset()
+		r.handleError(s, pb.CircuitRelay_HOP_CANT_OPEN_DST_STREAM)
+		return
+	}
+
+	msg.Reset()
+
+	err = rd.ReadMsg(msg)
+	if err != nil {
+		log.Debugf("error reading stop response: %s", err.Error())
+		bs.Reset()
+		r.handleError(s, pb.CircuitRelay_HOP_CANT_OPEN_DST_STREAM)
+		return
+	}
+
+	if msg.GetType() != pb.CircuitRelay_STATUS {
+		log.Debugf("unexpected relay stop response: not a status message (%d)", msg.GetType())
+		bs.Reset()
+		r.handleError(s, pb.CircuitRelay_HOP_CANT_OPEN_DST_STREAM)
+		return
+	}
+
+	if msg.GetCode() != pb.CircuitRelay_SUCCESS {
+		log.Debugf("relay stop failure: %d", msg.GetCode())
+		bs.Reset()
+		r.handleError(s, msg.GetCode())
+		return
+	}
+
+	err = r.writeResponse(s, pb.CircuitRelay_SUCCESS)
+	if err != nil {
+		log.Debugf("error writing relay response: %s", err.Error())
+		bs.Reset()
+		s.Reset()
+		return
+	}
+
+	// relay connection
+	log.Infof("relaying connection between %s and %s", src.ID.Pretty(), dst.ID.Pretty())
+
+	// reset deadline
+	bs.SetDeadline(time.Time{})
+
+	r.addLiveHop(src.ID, dst.ID)
+
+	goroutines := new(int32)
+	*goroutines = 2
+	done := func() {
+		if atomic.AddInt32(goroutines, -1) == 0 {
+			s.Close()
+			bs.Close()
+			r.rmLiveHop(src.ID, dst.ID)
+		}
+	}
+
+	// Don't reset streams after finishing or the other side will get an
+	// error, not an EOF.
+	go func() {
+		defer done()
+
+		buf := pool.Get(HopStreamBufferSize)
+		defer pool.Put(buf)
+
+		count, err := io.CopyBuffer(s, bs, buf)
+		if err != nil {
+			log.Debugf("relay copy error: %s", err)
+			// Reset both.
+			s.Reset()
+			bs.Reset()
+		} else {
+			// propagate the close
+			s.CloseWrite()
+		}
+		log.Debugf("relayed %d bytes from %s to %s", count, dst.ID.Pretty(), src.ID.Pretty())
+	}()
+
+	go func() {
+		defer done()
+
+		buf := pool.Get(HopStreamBufferSize)
+		defer pool.Put(buf)
+
+		count, err := io.CopyBuffer(bs, s, buf)
+		if err != nil {
+			log.Debugf("relay copy error: %s", err)
+			// Reset both.
+			bs.Reset()
+			s.Reset()
+		} else {
+			// propagate the close
+			bs.CloseWrite()
+		}
+		log.Debugf("relayed %d bytes from %s to %s", count, src.ID.Pretty(), dst.ID.Pretty())
+	}()
+}
+
+func (r *Relay) handleStopStream(s network.Stream, msg *pb.CircuitRelay) {
+	src, err := peerToPeerInfo(msg.GetSrcPeer())
+	if err != nil {
+		r.handleError(s, pb.CircuitRelay_STOP_SRC_MULTIADDR_INVALID)
+		return
+	}
+
+	dst, err := peerToPeerInfo(msg.GetDstPeer())
+	if err != nil || dst.ID != r.self {
+		r.handleError(s, pb.CircuitRelay_STOP_DST_MULTIADDR_INVALID)
+		return
+	}
+
+	log.Infof("relay connection from: %s", src.ID)
+
+	if len(src.Addrs) > 0 {
+		r.host.Peerstore().AddAddrs(src.ID, src.Addrs, peerstore.TempAddrTTL)
+	}
+
+	select {
+	case r.incoming <- &Conn{stream: s, remote: src, host: r.host, relay: r}:
+	case <-time.After(RelayAcceptTimeout):
+		r.handleError(s, pb.CircuitRelay_STOP_RELAY_REFUSED)
+	}
+}
+
+func (r *Relay) handleCanHop(s network.Stream, msg *pb.CircuitRelay) {
+	var err error
+
+	if r.hop {
+		err = r.writeResponse(s, pb.CircuitRelay_SUCCESS)
+	} else {
+		err = r.writeResponse(s, pb.CircuitRelay_HOP_CANT_SPEAK_RELAY)
+	}
+
+	if err != nil {
+		s.Reset()
+		log.Debugf("error writing relay response: %s", err.Error())
+	} else {
+		s.Close()
+	}
+}
+
+func (r *Relay) handleError(s network.Stream, code pb.CircuitRelay_Status) {
+	log.Warnf("relay error: %s (%d)", pb.CircuitRelay_Status_name[int32(code)], code)
+	err := r.writeResponse(s, code)
+	if err != nil {
+		s.Reset()
+		log.Debugf("error writing relay response: %s", err.Error())
+	} else {
+		s.Close()
+	}
+}
+
+func (r *Relay) writeResponse(s network.Stream, code pb.CircuitRelay_Status) error {
+	wr := newDelimitedWriter(s)
+
+	var msg pb.CircuitRelay
+	msg.Type = pb.CircuitRelay_STATUS.Enum()
+	msg.Code = code.Enum()
+
+	return wr.WriteMsg(&msg)
+}

p2p/protocol/internal/circuitv1-deprecated/relay_test.go

@@ -0,0 +1,468 @@
+//lint:file-ignore U1000 Ignore all unused code, we're not running any tests.
+package relay_test
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"testing"
+	"time"
+
+	bhost "github.com/libp2p/go-libp2p/p2p/host/blank"
+	"github.com/libp2p/go-libp2p/p2p/net/swarm"
+	swarmt "github.com/libp2p/go-libp2p/p2p/net/swarm/testing"
+	. "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated"
+	pb "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated/pb"
+
+	"github.com/libp2p/go-libp2p-core/host"
+
+	ma "github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+)
+
+/* TODO: add tests
+- simple A -[R]-> B
+- A tries to relay through R, R doesnt support relay
+- A tries to relay through R to B, B doesnt support relay
+- A sends too long multiaddr
+- R drops stream mid-message
+- A relays through R, R has no connection to B
+*/
+
+func getNetHosts(t *testing.T, n int) []host.Host {
+	var out []host.Host
+
+	for i := 0; i < n; i++ {
+		netw := swarmt.GenSwarm(t)
+		h := bhost.NewBlankHost(netw)
+		out = append(out, h)
+	}
+
+	return out
+}
+
+func newTestRelay(t *testing.T, host host.Host, opts ...RelayOpt) *Relay {
+	r, err := NewRelay(host, swarmt.GenUpgrader(t, host.Network().(*swarm.Swarm)), opts...)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return r
+}
+
+func connect(t *testing.T, a, b host.Host) {
+	pinfo := a.Peerstore().PeerInfo(a.ID())
+	err := b.Connect(context.Background(), pinfo)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestBasicRelay(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	newTestRelay(t, hosts[1], OptHop)
+
+	r3 := newTestRelay(t, hosts[2])
+
+	var (
+		conn1, conn2 net.Conn
+		done         = make(chan struct{})
+	)
+
+	defer func() {
+		<-done
+		if conn1 != nil {
+			conn1.Close()
+		}
+		if conn2 != nil {
+			conn2.Close()
+		}
+	}()
+
+	msg := []byte("relay works!")
+	go func() {
+		defer close(done)
+		list := r3.Listener()
+
+		var err error
+		conn1, err = list.Accept()
+		if err != nil {
+			t.Error(err)
+			return
+		}
+
+		_, err = conn1.Write(msg)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+	}()
+
+	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
+	dinfo := hosts[2].Peerstore().PeerInfo(hosts[2].ID())
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	var err error
+	conn2, err = r1.DialPeer(rctx, rinfo, dinfo)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	result := make([]byte, len(msg))
+	_, err = io.ReadFull(conn2, result)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(result, msg) {
+		t.Fatal("message was incorrect:", string(result))
+	}
+}
+
+func TestRelayReset(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	newTestRelay(t, hosts[1], OptHop)
+
+	r3 := newTestRelay(t, hosts[2])
+
+	ready := make(chan struct{})
+
+	msg := []byte("relay works!")
+	go func() {
+		list := r3.Listener()
+
+		con, err := list.Accept()
+		if err != nil {
+			t.Error(err)
+			return
+		}
+
+		<-ready
+
+		_, err = con.Write(msg)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+
+		hosts[2].Network().ClosePeer(hosts[1].ID())
+	}()
+
+	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
+	dinfo := hosts[2].Peerstore().PeerInfo(hosts[2].ID())
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	con, err := r1.DialPeer(rctx, rinfo, dinfo)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	close(ready)
+
+	_, err = ioutil.ReadAll(con)
+	if err == nil {
+		t.Fatal("expected error for reset relayed connection")
+	}
+}
+
+func TestBasicRelayDial(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	_ = newTestRelay(t, hosts[1], OptHop)
+	r3 := newTestRelay(t, hosts[2])
+
+	var (
+		conn1, conn2 net.Conn
+		done         = make(chan struct{})
+	)
+
+	defer func() {
+		cancel()
+		<-done
+		if conn1 != nil {
+			conn1.Close()
+		}
+		if conn2 != nil {
+			conn2.Close()
+		}
+	}()
+
+	msg := []byte("relay works!")
+	go func() {
+		defer close(done)
+		list := r3.Listener()
+
+		var err error
+		conn1, err = list.Accept()
+		if err != nil {
+			t.Error(err)
+			return
+		}
+
+		_, err = conn1.Write(msg)
+		if err != nil {
+			t.Error(err)
+			return
+		}
+	}()
+
+	addr := ma.StringCast(fmt.Sprintf("/ipfs/%s/p2p-circuit", hosts[1].ID().Pretty()))
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	var err error
+	conn2, err = r1.Dial(rctx, addr, hosts[2].ID())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data := make([]byte, len(msg))
+	_, err = io.ReadFull(conn2, data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(data, msg) {
+		t.Fatal("message was incorrect:", string(data))
+	}
+}
+
+func TestUnspecificRelayDialFails(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	hosts := getNetHosts(t, 3)
+
+	r1 := newTestRelay(t, hosts[0])
+	newTestRelay(t, hosts[1], OptHop)
+	r3 := newTestRelay(t, hosts[2])
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(100 * time.Millisecond)
+
+	go func() {
+		if _, err := r3.Listener().Accept(); err == nil {
+			t.Error("should not have received relay connection")
+		}
+	}()
+
+	addr := ma.StringCast("/p2p-circuit")
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	if _, err := r1.Dial(ctx, addr, hosts[2].ID()); err == nil {
+		t.Fatal("expected dial with unspecified relay address to fail, even if we're connected to a relay")
+	}
+}
+
+func TestRelayThroughNonHop(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	newTestRelay(t, hosts[1])
+
+	newTestRelay(t, hosts[2])
+
+	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
+	dinfo := hosts[2].Peerstore().PeerInfo(hosts[2].ID())
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	_, err := r1.DialPeer(rctx, rinfo, dinfo)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+
+	rerr, ok := err.(RelayError)
+	if !ok {
+		t.Fatalf("expected RelayError: %#v", err)
+	}
+
+	if rerr.Code != pb.CircuitRelay_HOP_CANT_SPEAK_RELAY {
+		t.Fatal("expected 'HOP_CANT_SPEAK_RELAY' error")
+	}
+}
+
+func TestRelayNoDestConnection(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	newTestRelay(t, hosts[1], OptHop)
+
+	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
+	dinfo := hosts[2].Peerstore().PeerInfo(hosts[2].ID())
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	_, err := r1.DialPeer(rctx, rinfo, dinfo)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+
+	rerr, ok := err.(RelayError)
+	if !ok {
+		t.Fatalf("expected RelayError: %#v", err)
+	}
+
+	if rerr.Code != pb.CircuitRelay_HOP_NO_CONN_TO_DST {
+		t.Fatal("expected 'HOP_NO_CONN_TO_DST' error")
+	}
+}
+
+func TestActiveRelay(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 3)
+
+	connect(t, hosts[0], hosts[1])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+	newTestRelay(t, hosts[1], OptHop, OptActive)
+	r3 := newTestRelay(t, hosts[2])
+
+	connChan := make(chan manet.Conn)
+
+	msg := []byte("relay works!")
+	go func() {
+		defer close(connChan)
+		list := r3.Listener()
+
+		conn1, err := list.Accept()
+		if err != nil {
+			t.Error(err)
+			return
+		}
+
+		if _, err := conn1.Write(msg); err != nil {
+			t.Error(err)
+			return
+		}
+		connChan <- conn1
+	}()
+
+	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
+	dinfo := hosts[2].Peerstore().PeerInfo(hosts[2].ID())
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	conn2, err := r1.DialPeer(rctx, rinfo, dinfo)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer conn2.Close()
+
+	data := make([]byte, len(msg))
+	_, err = io.ReadFull(conn2, data)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(data, msg) {
+		t.Fatal("message was incorrect:", string(data))
+	}
+	conn1, ok := <-connChan
+	if !ok {
+		t.Fatal("listener didn't accept a connection")
+	}
+	conn1.Close()
+}
+
+func TestRelayCanHop(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := getNetHosts(t, 2)
+
+	connect(t, hosts[0], hosts[1])
+
+	time.Sleep(10 * time.Millisecond)
+
+	r1 := newTestRelay(t, hosts[0])
+
+	newTestRelay(t, hosts[1], OptHop)
+
+	canhop, err := r1.CanHop(ctx, hosts[1].ID())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !canhop {
+		t.Fatal("Relay can't hop")
+	}
+}

p2p/protocol/internal/circuitv1-deprecated/transport.go

@@ -0,0 +1,74 @@
+package relay
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/transport"
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+var circuitAddr = ma.Cast(ma.ProtocolWithCode(ma.P_CIRCUIT).VCode)
+
+var _ transport.Transport = (*RelayTransport)(nil)
+var _ io.Closer = (*RelayTransport)(nil)
+
+type RelayTransport Relay
+
+func (t *RelayTransport) Relay() *Relay {
+	return (*Relay)(t)
+}
+
+func (r *Relay) Transport() *RelayTransport {
+	return (*RelayTransport)(r)
+}
+
+func (t *RelayTransport) Listen(laddr ma.Multiaddr) (transport.Listener, error) {
+	// TODO: Ensure we have a connection to the relay, if specified. Also,
+	// make sure the multiaddr makes sense.
+	if !t.Relay().Matches(laddr) {
+		return nil, fmt.Errorf("%s is not a relay address", laddr)
+	}
+	return t.upgrader.UpgradeListener(t, t.Relay().Listener()), nil
+}
+
+func (t *RelayTransport) CanDial(raddr ma.Multiaddr) bool {
+	return t.Relay().Matches(raddr)
+}
+
+func (t *RelayTransport) Proxy() bool {
+	return true
+}
+
+func (t *RelayTransport) Protocols() []int {
+	return []int{ma.P_CIRCUIT}
+}
+
+func (r *RelayTransport) Close() error {
+	r.ctxCancel()
+	return nil
+}
+
+// AddRelayTransport constructs a relay and adds it as a transport to the host network.
+func AddRelayTransport(h host.Host, upgrader transport.Upgrader, opts ...RelayOpt) error {
+	n, ok := h.Network().(transport.TransportNetwork)
+	if !ok {
+		return fmt.Errorf("%v is not a transport network", h.Network())
+	}
+
+	r, err := NewRelay(h, upgrader, opts...)
+	if err != nil {
+		return err
+	}
+
+	// There's no nice way to handle these errors as we have no way to tear
+	// down the relay.
+	// TODO
+	if err := n.AddTransport(r.Transport()); err != nil {
+		log.Error("failed to add relay transport:", err)
+	} else if err := n.Listen(r.Listener().Multiaddr()); err != nil {
+		log.Error("failed to listen on relay transport:", err)
+	}
+	return nil
+}

p2p/protocol/internal/circuitv1-deprecated/transport_test.go

@@ -0,0 +1,156 @@
+//lint:file-ignore U1000 Ignore all unused code, we're not running any tests.
+package relay_test
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"io/ioutil"
+	"testing"
+	"time"
+
+	"github.com/libp2p/go-libp2p/p2p/net/swarm"
+	swarmt "github.com/libp2p/go-libp2p/p2p/net/swarm/testing"
+	. "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peerstore"
+
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+const TestProto = "test/relay-transport"
+
+var msg = []byte("relay works!")
+
+func testSetupRelay(t *testing.T) []host.Host {
+	hosts := getNetHosts(t, 3)
+
+	err := AddRelayTransport(hosts[0], swarmt.GenUpgrader(t, hosts[0].Network().(*swarm.Swarm)))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = AddRelayTransport(hosts[1], swarmt.GenUpgrader(t, hosts[1].Network().(*swarm.Swarm)), OptHop)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = AddRelayTransport(hosts[2], swarmt.GenUpgrader(t, hosts[2].Network().(*swarm.Swarm)))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	connect(t, hosts[0], hosts[1])
+	connect(t, hosts[1], hosts[2])
+
+	time.Sleep(100 * time.Millisecond)
+
+	handler := func(s network.Stream) {
+		_, err := s.Write(msg)
+		if err != nil {
+			t.Error(err)
+		}
+		s.Close()
+	}
+
+	hosts[2].SetStreamHandler(TestProto, handler)
+
+	return hosts
+}
+
+func TestFullAddressTransportDial(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	hosts := testSetupRelay(t)
+
+	var relayAddr ma.Multiaddr
+	for _, addr := range hosts[1].Addrs() {
+		// skip relay addrs.
+		if _, err := addr.ValueForProtocol(ma.P_CIRCUIT); err != nil {
+			relayAddr = addr
+		}
+	}
+
+	addr, err := ma.NewMultiaddr(fmt.Sprintf("%s/p2p/%s/p2p-circuit/p2p/%s", relayAddr.String(), hosts[1].ID().Pretty(), hosts[2].ID().Pretty()))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	hosts[0].Peerstore().AddAddrs(hosts[2].ID(), []ma.Multiaddr{addr}, peerstore.TempAddrTTL)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	s, err := hosts[0].NewStream(ctx, hosts[2].ID(), TestProto)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data, err := ioutil.ReadAll(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(data, msg) {
+		t.Fatal("message was incorrect:", string(data))
+	}
+}
+
+func TestSpecificRelayTransportDial(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := testSetupRelay(t)
+
+	addr, err := ma.NewMultiaddr(fmt.Sprintf("/ipfs/%s/p2p-circuit/ipfs/%s", hosts[1].ID().Pretty(), hosts[2].ID().Pretty()))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	hosts[0].Peerstore().AddAddrs(hosts[2].ID(), []ma.Multiaddr{addr}, peerstore.TempAddrTTL)
+
+	s, err := hosts[0].NewStream(rctx, hosts[2].ID(), TestProto)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	data, err := ioutil.ReadAll(s)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !bytes.Equal(data, msg) {
+		t.Fatal("message was incorrect:", string(data))
+	}
+}
+
+func TestUnspecificRelayTransportDialFails(t *testing.T) {
+	t.Skip("This package is legacy code we only keep around for testing purposes.")
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	hosts := testSetupRelay(t)
+
+	addr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p-circuit/ipfs/%s", hosts[2].ID().Pretty()))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rctx, rcancel := context.WithTimeout(ctx, time.Second)
+	defer rcancel()
+
+	hosts[0].Peerstore().AddAddrs(hosts[2].ID(), []ma.Multiaddr{addr}, peerstore.TempAddrTTL)
+
+	_, err = hosts[0].NewStream(rctx, hosts[2].ID(), TestProto)
+	if err == nil {
+		t.Fatal("dial to unspecified address should have failed")
+	}
+
+}

p2p/protocol/internal/circuitv1-deprecated/util.go

@@ -0,0 +1,118 @@
+package relay
+
+import (
+	"errors"
+	"io"
+
+	pb "github.com/libp2p/go-libp2p/p2p/protocol/internal/circuitv1-deprecated/pb"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+
+	pool "github.com/libp2p/go-buffer-pool"
+	"github.com/libp2p/go-msgio/protoio"
+
+	"github.com/gogo/protobuf/proto"
+	ma "github.com/multiformats/go-multiaddr"
+	"github.com/multiformats/go-varint"
+)
+
+func peerToPeerInfo(p *pb.CircuitRelay_Peer) (peer.AddrInfo, error) {
+	if p == nil {
+		return peer.AddrInfo{}, errors.New("nil peer")
+	}
+
+	id, err := peer.IDFromBytes(p.Id)
+	if err != nil {
+		return peer.AddrInfo{}, err
+	}
+
+	addrs := make([]ma.Multiaddr, 0, len(p.Addrs))
+	for _, addrBytes := range p.Addrs {
+		a, err := ma.NewMultiaddrBytes(addrBytes)
+		if err == nil {
+			addrs = append(addrs, a)
+		}
+	}
+
+	return peer.AddrInfo{ID: id, Addrs: addrs}, nil
+}
+
+func peerInfoToPeer(pi peer.AddrInfo) *pb.CircuitRelay_Peer {
+	addrs := make([][]byte, len(pi.Addrs))
+	for i, addr := range pi.Addrs {
+		addrs[i] = addr.Bytes()
+	}
+
+	p := new(pb.CircuitRelay_Peer)
+	p.Id = []byte(pi.ID)
+	p.Addrs = addrs
+
+	return p
+}
+
+func incrementTag(v int) int {
+	return v + 1
+}
+
+func decrementTag(v int) int {
+	if v > 0 {
+		return v - 1
+	} else {
+		return v
+	}
+}
+
+type delimitedReader struct {
+	r   io.Reader
+	buf []byte
+}
+
+// The gogo protobuf NewDelimitedReader is buffered, which may eat up stream data.
+// So we need to implement a compatible delimited reader that reads unbuffered.
+// There is a slowdown from unbuffered reading: when reading the message
+// it can take multiple single byte Reads to read the length and another Read
+// to read the message payload.
+// However, this is not critical performance degradation as
+// - the reader is utilized to read one (dialer, stop) or two messages (hop) during
+//   the handshake, so it's a drop in the water for the connection lifetime.
+// - messages are small (max 4k) and the length fits in a couple of bytes,
+//   so overall we have at most three reads per message.
+func newDelimitedReader(r io.Reader, maxSize int) *delimitedReader {
+	return &delimitedReader{r: r, buf: pool.Get(maxSize)}
+}
+
+func (d *delimitedReader) Close() {
+	if d.buf != nil {
+		pool.Put(d.buf)
+		d.buf = nil
+	}
+}
+
+func (d *delimitedReader) ReadByte() (byte, error) {
+	buf := d.buf[:1]
+	_, err := d.r.Read(buf)
+	return buf[0], err
+}
+
+func (d *delimitedReader) ReadMsg(msg proto.Message) error {
+	mlen, err := varint.ReadUvarint(d)
+	if err != nil {
+		return err
+	}
+
+	if uint64(len(d.buf)) < mlen {
+		return errors.New("message too large")
+	}
+
+	buf := d.buf[:mlen]
+	_, err = io.ReadFull(d.r, buf)
+	if err != nil {
+		return err
+	}
+
+	return proto.Unmarshal(buf, msg)
+}
+
+func newDelimitedWriter(w io.Writer) protoio.WriteCloser {
+	return protoio.NewDelimitedWriter(w)
+}