mirror of
https://github.com/xmdhs/natupnp.git
synced 2025-10-31 18:33:19 +08:00
first commit
This commit is contained in:
xmdhs
17
go.mod
Normal file
17
go.mod
Normal file
@@ -0,0 +1,17 @@
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module github.com/xmdhs/natupnp
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go 1.20
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require github.com/pion/stun v0.5.2
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require (
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github.com/huin/goupnp v1.2.0
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github.com/pion/dtls/v2 v2.2.6 // indirect
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github.com/pion/logging v0.2.2 // indirect
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github.com/pion/transport/v2 v2.2.0 // indirect
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github.com/pion/udp/v2 v2.0.1 // indirect
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github.com/portmapping/go-reuse v0.0.3
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golang.org/x/crypto v0.5.0 // indirect
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golang.org/x/sync v0.2.0
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golang.org/x/sys v0.7.0 // indirect
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)
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80
go.sum
Normal file
80
go.sum
Normal file
@@ -0,0 +1,80 @@
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/huin/goupnp v1.2.0 h1:uOKW26NG1hsSSbXIZ1IR7XP9Gjd1U8pnLaCMgntmkmY=
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github.com/huin/goupnp v1.2.0/go.mod h1:gnGPsThkYa7bFi/KWmEysQRf48l2dvR5bxr2OFckNX8=
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github.com/pion/dtls/v2 v2.2.6 h1:yXMxKr0Skd+Ub6A8UqXTRLSywskx93ooMRHsQUtd+Z4=
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github.com/pion/dtls/v2 v2.2.6/go.mod h1:t8fWJCIquY5rlQZwA2yWxUS1+OCrAdXrhVKXB5oD/wY=
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github.com/pion/logging v0.2.2 h1:M9+AIj/+pxNsDfAT64+MAVgJO0rsyLnoJKCqf//DoeY=
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github.com/pion/logging v0.2.2/go.mod h1:k0/tDVsRCX2Mb2ZEmTqNa7CWsQPc+YYCB7Q+5pahoms=
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github.com/pion/stun v0.5.2 h1:J/8glQnDV91dfk2+ZnGN0o9bUJgABhTNljwfQWByoXE=
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github.com/pion/stun v0.5.2/go.mod h1:TNo1HjyjaFVpMZsvowqPeV8TfwRytympQC0//neaksA=
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github.com/pion/transport/v2 v2.0.2/go.mod h1:vrz6bUbFr/cjdwbnxq8OdDDzHf7JJfGsIRkxfpZoTA0=
|
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github.com/pion/transport/v2 v2.2.0 h1:u5lFqFHkXLMXMzai8tixZDfVjb8eOjH35yCunhPeb1c=
|
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github.com/pion/transport/v2 v2.2.0/go.mod h1:AdSw4YBZVDkZm8fpoz+fclXyQwANWmZAlDuQdctTThQ=
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github.com/pion/udp/v2 v2.0.1 h1:xP0z6WNux1zWEjhC7onRA3EwwSliXqu1ElUZAQhUP54=
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github.com/pion/udp/v2 v2.0.1/go.mod h1:B7uvTMP00lzWdyMr/1PVZXtV3wpPIxBRd4Wl6AksXn8=
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github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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github.com/portmapping/go-reuse v0.0.3 h1:iY0JDxTTUaYopewHL0CLN5BqJ0BvDP48VzC2osPpkBQ=
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github.com/portmapping/go-reuse v0.0.3/go.mod h1:xKeiOLrJpAUOineqiMEm1bpy6cq0vTdpoiebdRD45mo=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
|
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github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
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github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
|
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github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
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github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
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github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
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github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
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github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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golang.org/x/crypto v0.5.0 h1:U/0M97KRkSFvyD/3FSmdP5W5swImpNgle/EHFhOsQPE=
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golang.org/x/crypto v0.5.0/go.mod h1:NK/OQwhpMQP3MwtdjgLlYHnH9ebylxKWv3e0fK+mkQU=
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golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
|
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golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
|
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golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
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golang.org/x/net v0.5.0/go.mod h1:DivGGAXEgPSlEBzxGzZI+ZLohi+xUj054jfeKui00ws=
|
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golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
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golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
|
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golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
|
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golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
|
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
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golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
|
||||
golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
|
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golang.org/x/sys v0.0.0-20200501145240-bc7a7d42d5c3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
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golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.4.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
|
||||
golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
|
||||
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
|
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golang.org/x/term v0.4.0/go.mod h1:9P2UbLfCdcvo3p/nzKvsmas4TnlujnuoV9hGgYzW1lQ=
|
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golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
|
||||
golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
|
||||
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
||||
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
|
||||
golang.org/x/text v0.6.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
|
||||
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
|
||||
golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
|
||||
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
|
||||
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
|
||||
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
|
||||
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
|
||||
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
|
||||
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
|
||||
25
main.go
Normal file
25
main.go
Normal file
@@ -0,0 +1,25 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"log"
|
||||
"os"
|
||||
|
||||
"github.com/xmdhs/natupnp/natmap"
|
||||
)
|
||||
|
||||
func main() {
|
||||
m, s, err := natmap.NatMap(context.Background(), "stun.sipnet.com:3478", "192.168.23.104", 9999, func(s string) {
|
||||
log.Println(s)
|
||||
})
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
defer m.Close()
|
||||
|
||||
fmt.Println(s)
|
||||
|
||||
os.Stdin.Read(make([]byte, 1))
|
||||
}
|
||||
67
natmap/natmap.go
Normal file
67
natmap/natmap.go
Normal file
@@ -0,0 +1,67 @@
|
||||
package natmap
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"net"
|
||||
"net/http"
|
||||
"strconv"
|
||||
"time"
|
||||
|
||||
"github.com/xmdhs/natupnp/reuse"
|
||||
"github.com/xmdhs/natupnp/stun"
|
||||
"github.com/xmdhs/natupnp/upnp"
|
||||
)
|
||||
|
||||
type Map struct {
|
||||
cancel func()
|
||||
}
|
||||
|
||||
func NatMap(ctx context.Context, stunAddr string, host string, port uint16, log func(string)) (*Map, string, error) {
|
||||
m := Map{}
|
||||
ctx, cancel := context.WithCancel(ctx)
|
||||
m.cancel = cancel
|
||||
err := upnp.AddPortMapping(ctx, "", port, "TCP", port, host, true, "github.com/xmdhs/natupnp", 0)
|
||||
if err != nil {
|
||||
return nil, "", fmt.Errorf("NatMap: %w", err)
|
||||
}
|
||||
go keepalive(ctx, port, log)
|
||||
|
||||
stunConn, err := reuse.DialContext(ctx, "tcp", "0.0.0.0:"+strconv.Itoa(int(port)), stunAddr)
|
||||
if err != nil {
|
||||
return nil, "", fmt.Errorf("NatMap: %w", err)
|
||||
}
|
||||
mapAddr, err := stun.GetMappedAddress(ctx, stunConn)
|
||||
if err != nil {
|
||||
return nil, "", fmt.Errorf("NatMap: %w", err)
|
||||
}
|
||||
|
||||
return &m, fmt.Sprintf("%v:%v", mapAddr.IP.String(), mapAddr.Port), nil
|
||||
}
|
||||
|
||||
func (m Map) Close() error {
|
||||
m.cancel()
|
||||
return nil
|
||||
}
|
||||
|
||||
func keepalive(ctx context.Context, port uint16, log func(string)) {
|
||||
tr := http.DefaultTransport.(*http.Transport).Clone()
|
||||
tr.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
|
||||
return reuse.DialContext(ctx, "tcp", "0.0.0.0:"+strconv.Itoa(int(port)), addr)
|
||||
}
|
||||
c := http.Client{Transport: tr}
|
||||
for {
|
||||
reqs, err := http.NewRequestWithContext(ctx, "GET", "http://connect.rom.miui.com/generate_204", nil)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
rep, err := c.Do(reqs)
|
||||
if err != nil {
|
||||
c.CloseIdleConnections()
|
||||
log(err.Error())
|
||||
continue
|
||||
}
|
||||
rep.Body.Close()
|
||||
time.Sleep(10 * time.Second)
|
||||
}
|
||||
}
|
||||
29
reuse/reuse.go
Normal file
29
reuse/reuse.go
Normal file
@@ -0,0 +1,29 @@
|
||||
package reuse
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
"net"
|
||||
|
||||
"github.com/portmapping/go-reuse"
|
||||
)
|
||||
|
||||
func DialContext(ctx context.Context, network, laddr, raddr string) (net.Conn, error) {
|
||||
nla, err := reuse.ResolveAddr(network, laddr)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("resolving local addr: %w", err)
|
||||
}
|
||||
d := net.Dialer{
|
||||
Control: reuse.Control,
|
||||
LocalAddr: nla,
|
||||
}
|
||||
return d.DialContext(ctx, network, raddr)
|
||||
}
|
||||
|
||||
var listenConfig = net.ListenConfig{
|
||||
Control: reuse.Control,
|
||||
}
|
||||
|
||||
func Listen(ctx context.Context, network, address string) (net.Listener, error) {
|
||||
return listenConfig.Listen(context.Background(), network, address)
|
||||
}
|
||||
35
stun/stun.go
Normal file
35
stun/stun.go
Normal file
@@ -0,0 +1,35 @@
|
||||
package stun
|
||||
|
||||
import (
|
||||
"context"
|
||||
"fmt"
|
||||
|
||||
"github.com/pion/stun"
|
||||
)
|
||||
|
||||
func GetMappedAddress(ctx context.Context, coon stun.Connection) (stun.XORMappedAddress, error) {
|
||||
c, err := stun.NewClient(coon)
|
||||
if err != nil {
|
||||
return stun.XORMappedAddress{}, fmt.Errorf("GetMappedAddress: %w", err)
|
||||
}
|
||||
defer c.Close()
|
||||
|
||||
var eErr error
|
||||
var xorAddr stun.XORMappedAddress
|
||||
if err = c.Do(stun.MustBuild(stun.TransactionID, stun.BindingRequest), func(res stun.Event) {
|
||||
if res.Error != nil {
|
||||
eErr = res.Error
|
||||
return
|
||||
}
|
||||
if getErr := xorAddr.GetFrom(res.Message); getErr != nil {
|
||||
eErr = getErr
|
||||
return
|
||||
}
|
||||
}); err != nil {
|
||||
return stun.XORMappedAddress{}, fmt.Errorf("GetMappedAddress: %w", err)
|
||||
}
|
||||
if eErr != nil {
|
||||
return stun.XORMappedAddress{}, fmt.Errorf("GetMappedAddress: %w", err)
|
||||
}
|
||||
return xorAddr, nil
|
||||
}
|
||||
110
upnp/upnp.go
Normal file
110
upnp/upnp.go
Normal file
@@ -0,0 +1,110 @@
|
||||
package upnp
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"github.com/huin/goupnp/dcps/ocf/internetgateway2"
|
||||
"golang.org/x/sync/errgroup"
|
||||
)
|
||||
|
||||
func AddPortMapping(ctx context.Context,
|
||||
NewRemoteHost string,
|
||||
NewExternalPort uint16,
|
||||
NewProtocol string,
|
||||
NewInternalPort uint16,
|
||||
NewInternalClient string,
|
||||
NewEnabled bool,
|
||||
NewPortMappingDescription string,
|
||||
NewLeaseDuration uint32,
|
||||
) error {
|
||||
clients, err := pickRouterClient(ctx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("AddPortMapping: %w", err)
|
||||
}
|
||||
|
||||
tasks, _ := errgroup.WithContext(ctx)
|
||||
|
||||
for _, v := range clients {
|
||||
v := v
|
||||
tasks.Go(func() error {
|
||||
return v.AddPortMapping(NewRemoteHost, NewExternalPort, NewProtocol, NewInternalPort, NewInternalClient, NewEnabled, NewPortMappingDescription, NewLeaseDuration)
|
||||
})
|
||||
}
|
||||
|
||||
if err := tasks.Wait(); err != nil {
|
||||
return fmt.Errorf("AddPortMapping: %w", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
type routerClient interface {
|
||||
AddPortMapping(
|
||||
NewRemoteHost string,
|
||||
NewExternalPort uint16,
|
||||
NewProtocol string,
|
||||
NewInternalPort uint16,
|
||||
NewInternalClient string,
|
||||
NewEnabled bool,
|
||||
NewPortMappingDescription string,
|
||||
NewLeaseDuration uint32,
|
||||
) (err error)
|
||||
|
||||
GetExternalIPAddress() (
|
||||
NewExternalIPAddress string,
|
||||
err error,
|
||||
)
|
||||
}
|
||||
|
||||
func pickRouterClient(ctx context.Context) ([]routerClient, error) {
|
||||
tasks, _ := errgroup.WithContext(ctx)
|
||||
// Request each type of client in parallel, and return what is found.
|
||||
var ip1Clients []*internetgateway2.WANIPConnection1
|
||||
tasks.Go(func() error {
|
||||
var err error
|
||||
ip1Clients, _, err = internetgateway2.NewWANIPConnection1Clients()
|
||||
return err
|
||||
})
|
||||
var ip2Clients []*internetgateway2.WANIPConnection2
|
||||
tasks.Go(func() error {
|
||||
var err error
|
||||
ip2Clients, _, err = internetgateway2.NewWANIPConnection2Clients()
|
||||
return err
|
||||
})
|
||||
var ppp1Clients []*internetgateway2.WANPPPConnection1
|
||||
tasks.Go(func() error {
|
||||
var err error
|
||||
ppp1Clients, _, err = internetgateway2.NewWANPPPConnection1Clients()
|
||||
return err
|
||||
})
|
||||
|
||||
if err := tasks.Wait(); err != nil {
|
||||
return nil, fmt.Errorf("pickRouterClient: %w", err)
|
||||
}
|
||||
|
||||
// Trivial handling for where we find exactly one device to talk to, you
|
||||
// might want to provide more flexible handling than this if multiple
|
||||
// devices are found.
|
||||
switch {
|
||||
case len(ip2Clients) == 1:
|
||||
return any2slice[routerClient](ip2Clients), nil
|
||||
case len(ip1Clients) == 1:
|
||||
return any2slice[routerClient](ip1Clients), nil
|
||||
case len(ppp1Clients) == 1:
|
||||
return any2slice[routerClient](ppp1Clients), nil
|
||||
default:
|
||||
return nil, fmt.Errorf("pickRouterClient: %w", ErrNoService)
|
||||
}
|
||||
}
|
||||
|
||||
var ErrNoService = errors.New("multiple or no services found")
|
||||
|
||||
func any2slice[T, E any](list []E) []T {
|
||||
nl := make([]T, 0, len(list))
|
||||
for _, v := range list {
|
||||
nl = append(nl, any(v).(T))
|
||||
}
|
||||
return nl
|
||||
}
|
||||
Reference in New Issue
Block a user