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implement parsing of the ADDRESS_ASSIGN capsule
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package masque | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "net/netip" | ||
|
|
||
| "github.com/quic-go/quic-go/http3" | ||
| "github.com/quic-go/quic-go/quicvarint" | ||
| ) | ||
|
|
||
| const capsuleTypeAddressAssign http3.CapsuleType = 1 | ||
|
|
||
| // addressAssignCapsule represents an ADDRESS_ASSIGN capsule | ||
| type addressAssignCapsule struct { | ||
| AssignedAddresses []AssignedAddress | ||
| } | ||
|
|
||
| // AssignedAddress represents an Assigned Address within an ADDRESS_ASSIGN capsule | ||
| type AssignedAddress struct { | ||
| RequestID uint64 | ||
| IPPrefix netip.Prefix | ||
| } | ||
|
|
||
| func parseAddressAssignCapsule(r io.Reader) (*addressAssignCapsule, error) { | ||
| var assignedAddresses []AssignedAddress | ||
| for { | ||
| addr, err := parseAssignedAddress(r) | ||
| if err != nil { | ||
| if err == io.EOF { | ||
| break | ||
| } | ||
| return nil, err | ||
| } | ||
| assignedAddresses = append(assignedAddresses, addr) | ||
| } | ||
| return &addressAssignCapsule{AssignedAddresses: assignedAddresses}, nil | ||
| } | ||
|
|
||
| func parseAssignedAddress(r io.Reader) (AssignedAddress, error) { | ||
| vr := quicvarint.NewReader(r) | ||
| requestID, err := quicvarint.Read(vr) | ||
| if err != nil { | ||
| return AssignedAddress{}, err | ||
| } | ||
| ipVersion, err := vr.ReadByte() | ||
| if err != nil { | ||
| return AssignedAddress{}, err | ||
| } | ||
| var ip netip.Addr | ||
| switch ipVersion { | ||
| case 4: | ||
| var ipv4 [4]byte | ||
| if _, err := io.ReadFull(r, ipv4[:]); err != nil { | ||
| return AssignedAddress{}, err | ||
| } | ||
| ip = netip.AddrFrom4(ipv4) | ||
| case 6: | ||
| var ipv6 [16]byte | ||
| if _, err := io.ReadFull(r, ipv6[:]); err != nil { | ||
| return AssignedAddress{}, err | ||
| } | ||
| ip = netip.AddrFrom16(ipv6) | ||
| default: | ||
| return AssignedAddress{}, fmt.Errorf("invalid IP version: %d", ipVersion) | ||
| } | ||
| prefixLen, err := vr.ReadByte() | ||
| if err != nil { | ||
| return AssignedAddress{}, err | ||
| } | ||
| if int(prefixLen) > ip.BitLen() { | ||
| return AssignedAddress{}, fmt.Errorf("prefix length %d exceeds IP address length (%d)", prefixLen, ip.BitLen()) | ||
| } | ||
| prefix := netip.PrefixFrom(ip, int(prefixLen)) | ||
| if prefix != prefix.Masked() { | ||
| return AssignedAddress{}, errors.New("lower bits not covered by prefix length are not all zero") | ||
| } | ||
| return AssignedAddress{RequestID: requestID, IPPrefix: prefix}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| package masque | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "io" | ||
| "net/netip" | ||
| "testing" | ||
|
|
||
| "github.com/quic-go/quic-go/http3" | ||
| "github.com/quic-go/quic-go/quicvarint" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestParseAddressAssignCapsule(t *testing.T) { | ||
| addr1 := quicvarint.Append(nil, 1337) // Request ID | ||
| addr1 = append(addr1, 4) // IPv4 | ||
| addr1 = append(addr1, netip.AddrFrom4([4]byte{1, 2, 3, 0}).AsSlice()...) | ||
| addr1 = append(addr1, 24) // IP Prefix Length | ||
| addr2 := quicvarint.Append(nil, 1338) // Request ID | ||
| addr2 = append(addr2, 6) // IPv6 | ||
| addr2 = append(addr2, netip.MustParseAddr("2001:db8::1").AsSlice()...) | ||
| addr2 = append(addr2, 128) // IP Prefix Length | ||
|
|
||
| data := quicvarint.Append(nil, uint64(capsuleTypeAddressAssign)) | ||
| data = quicvarint.Append(data, uint64(len(addr1)+len(addr2))) // Length | ||
| data = append(data, addr1...) | ||
| data = append(data, addr2...) | ||
|
|
||
| r := bytes.NewReader(data) | ||
| typ, cr, err := http3.ParseCapsule(r) | ||
| require.NoError(t, err) | ||
| require.Equal(t, capsuleTypeAddressAssign, typ) | ||
| capsule, err := parseAddressAssignCapsule(cr) | ||
| require.NoError(t, err) | ||
| require.Equal(t, | ||
| []AssignedAddress{ | ||
| {RequestID: 1337, IPPrefix: netip.MustParsePrefix("1.2.3.0/24")}, | ||
| {RequestID: 1338, IPPrefix: netip.MustParsePrefix("2001:db8::1/128")}, | ||
| }, | ||
| capsule.AssignedAddresses, | ||
| ) | ||
| require.Zero(t, r.Len()) | ||
| } | ||
|
|
||
| func TestParseAddressAssignCapsuleInvalid(t *testing.T) { | ||
| t.Run("invalid IP version", func(t *testing.T) { | ||
| addr1 := quicvarint.Append(nil, 1337) // Request ID | ||
| addr1 = append(addr1, 5) // Invalid IP version (not 4 or 6) | ||
| addr1 = append(addr1, netip.AddrFrom4([4]byte{1, 2, 3, 4}).AsSlice()...) | ||
| addr1 = append(addr1, 32) // IP Prefix Length | ||
| data := quicvarint.Append(nil, uint64(capsuleTypeAddressAssign)) | ||
| data = quicvarint.Append(data, uint64(len(addr1))) // Length | ||
| data = append(data, addr1...) | ||
|
|
||
| _, cr, err := http3.ParseCapsule(bytes.NewReader(data)) | ||
| require.NoError(t, err) | ||
| _, err = parseAddressAssignCapsule(cr) | ||
| require.ErrorContains(t, err, "invalid IP version: 5") | ||
| }) | ||
|
|
||
| t.Run("invalid prefix length", func(t *testing.T) { | ||
| addr1 := quicvarint.Append(nil, 1337) // Request ID | ||
| addr1 = append(addr1, 4) // IPv4 | ||
| addr1 = append(addr1, netip.AddrFrom4([4]byte{1, 2, 3, 4}).AsSlice()...) | ||
| addr1 = append(addr1, 33) // too long IP Prefix Length | ||
| data := quicvarint.Append(nil, uint64(capsuleTypeAddressAssign)) | ||
| data = quicvarint.Append(data, uint64(len(addr1))) // Length | ||
| data = append(data, addr1...) | ||
|
|
||
| _, cr, err := http3.ParseCapsule(bytes.NewReader(data)) | ||
| require.NoError(t, err) | ||
| _, err = parseAddressAssignCapsule(cr) | ||
| require.ErrorContains(t, err, "prefix length 33 exceeds IP address length (32)") | ||
| }) | ||
|
|
||
| t.Run("lower bits not covered by prefix length are not all zero", func(t *testing.T) { | ||
| addr1 := quicvarint.Append(nil, 1337) // Request ID | ||
| addr1 = append(addr1, 4) // IPv4 | ||
| addr1 = append(addr1, netip.AddrFrom4([4]byte{1, 2, 3, 4}).AsSlice()...) // non-zero lower bits | ||
| addr1 = append(addr1, 28) // IP Prefix Length | ||
| data := quicvarint.Append(nil, uint64(capsuleTypeAddressAssign)) | ||
| data = quicvarint.Append(data, uint64(len(addr1))) // Length | ||
| data = append(data, addr1...) | ||
|
|
||
| _, cr, err := http3.ParseCapsule(bytes.NewReader(data)) | ||
| require.NoError(t, err) | ||
| _, err = parseAddressAssignCapsule(cr) | ||
| require.ErrorContains(t, err, "lower bits not covered by prefix length are not all zero") | ||
| }) | ||
|
|
||
| t.Run("incomplete capsule", func(t *testing.T) { | ||
| addr1 := quicvarint.Append(nil, 1337) // Request ID | ||
| addr1 = append(addr1, 4) // IPv4 | ||
| addr1 = append(addr1, netip.AddrFrom4([4]byte{1, 2, 3, 4}).AsSlice()...) | ||
| addr1 = append(addr1, 32) // IP Prefix Length | ||
| data := quicvarint.Append(nil, uint64(capsuleTypeAddressAssign)) | ||
| data = quicvarint.Append(data, uint64(len(addr1))) // Length | ||
| data = append(data, addr1...) | ||
|
|
||
| _, cr, err := http3.ParseCapsule(bytes.NewReader(data)) | ||
| require.NoError(t, err) | ||
| _, err = parseAddressAssignCapsule(cr) | ||
| require.NoError(t, err) | ||
| for i := range data { | ||
| _, cr, err := http3.ParseCapsule(bytes.NewReader(data[:i])) | ||
| if err != nil { | ||
| if i == 0 { | ||
| require.ErrorIs(t, err, io.EOF) | ||
| } else { | ||
| require.ErrorIs(t, err, io.ErrUnexpectedEOF) | ||
| } | ||
| continue | ||
| } | ||
| _, err = parseAddressAssignCapsule(cr) | ||
| require.ErrorIs(t, err, io.ErrUnexpectedEOF) | ||
| } | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,28 @@ | ||
| module github.com/quic-go/connect-ip-go | ||
|
|
||
| go 1.22 | ||
|
|
||
| require ( | ||
| github.com/quic-go/quic-go v0.47.1-0.20241002141227-b2233591adc7 | ||
| github.com/stretchr/testify v1.9.0 | ||
| ) | ||
|
|
||
| require ( | ||
| github.com/davecgh/go-spew v1.1.1 // indirect | ||
| github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect | ||
| github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect | ||
| github.com/kr/pretty v0.3.1 // indirect | ||
| github.com/onsi/ginkgo/v2 v2.9.5 // indirect | ||
| github.com/pmezard/go-difflib v1.0.0 // indirect | ||
| github.com/quic-go/qpack v0.5.1 // indirect | ||
| go.uber.org/mock v0.4.0 // indirect | ||
| golang.org/x/crypto v0.26.0 // indirect | ||
| golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect | ||
| golang.org/x/mod v0.17.0 // indirect | ||
| golang.org/x/net v0.28.0 // indirect | ||
| golang.org/x/sys v0.23.0 // indirect | ||
| golang.org/x/text v0.17.0 // indirect | ||
| golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect | ||
| gopkg.in/yaml.v3 v3.0.1 // indirect | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= | ||
| 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/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= | ||
| github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= | ||
| github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ= | ||
| github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A= | ||
| github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI= | ||
| github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls= | ||
| github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg= | ||
| github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY= | ||
| github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI= | ||
| github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= | ||
| github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 h1:yAJXTCF9TqKcTiHJAE8dj7HMvPfh66eeA2JYW7eFpSE= | ||
| github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE= | ||
| github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc= | ||
| github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= | ||
| github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk= | ||
| github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= | ||
| github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= | ||
| github.com/onsi/ginkgo/v2 v2.9.5 h1:+6Hr4uxzP4XIUyAkg61dWBw8lb/gc4/X5luuxN/EC+Q= | ||
| github.com/onsi/ginkgo/v2 v2.9.5/go.mod h1:tvAoo1QUJwNEU2ITftXTpR7R1RbCzoZUOs3RonqW57k= | ||
| github.com/onsi/gomega v1.27.6 h1:ENqfyGeS5AX/rlXDd/ETokDz93u0YufY1Pgxuy/PvWE= | ||
| github.com/onsi/gomega v1.27.6/go.mod h1:PIQNjfQwkP3aQAH7lf7j87O/5FiNr+ZR8+ipb+qQlhg= | ||
| github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA= | ||
| github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= | ||
| github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= | ||
| github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI= | ||
| github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg= | ||
| github.com/quic-go/quic-go v0.47.1-0.20241002141227-b2233591adc7 h1:/yqMifKM4Z946YBFFUiysDy5jUlCxMNuCVfxArX/eMg= | ||
| github.com/quic-go/quic-go v0.47.1-0.20241002141227-b2233591adc7/go.mod h1:yBgs3rWBOADpga7F+jJsb6Ybg1LSYiQvwWlLX+/6HMs= | ||
| github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8= | ||
| github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs= | ||
| github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= | ||
| github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= | ||
| github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg= | ||
| github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY= | ||
| go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU= | ||
| go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc= | ||
| golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw= | ||
| golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54= | ||
| golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 h1:vr/HnozRka3pE4EsMEg1lgkXJkTFJCVUX+S/ZT6wYzM= | ||
| golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc= | ||
| golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA= | ||
| golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c= | ||
| golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE= | ||
| golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg= | ||
| golang.org/x/sync v0.8.0 h1:3NFvSEYkUoMifnESzZl15y791HH1qU2xm6eCJU5ZPXQ= | ||
| golang.org/x/sync v0.8.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk= | ||
| golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM= | ||
| golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= | ||
| golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc= | ||
| golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY= | ||
| golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk= | ||
| golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM= | ||
| golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg= | ||
| golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk= | ||
| google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI= | ||
| google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos= | ||
| gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY= | ||
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