Written a start mostly using 'water' and 'netlink' libraries to form
a basic TUN interface. Doesn't really work, since the tunnel gets formed but nothing can properly bind to it. I should probably rethink what i'm doing before moving forward lol Signed-off-by: JAMES RYAN <james.paul9889@gmail.com>
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12
go.mod
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12
go.mod
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module jptrlanding.dev/jptr/ssh-orchestrate
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go 1.22.3
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require (
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github.com/Psiphon-Labs/psiphon-tunnel-core v1.0.11-0.20240607114104-c1011b0e0261 // indirect
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github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091 // indirect
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github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8 // indirect
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github.com/vishvananda/netlink v1.1.0 // indirect
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github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df // indirect
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golang.org/x/sys v0.21.0 // indirect
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)
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13
go.sum
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go.sum
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github.com/Psiphon-Labs/psiphon-tunnel-core v1.0.11-0.20240607114104-c1011b0e0261 h1:QCbphNE60nTOGdEjFHQgymSKhMkJ9bdeCgTfqSaSJfI=
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github.com/Psiphon-Labs/psiphon-tunnel-core v1.0.11-0.20240607114104-c1011b0e0261/go.mod h1:Z5txHi6IF67uDg206QnSxkgE1I3FJUDDJ3n0pa+bKRs=
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github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091 h1:1zN6ImoqhSJhN8hGXFaJlSC8msLmIbX8bFqOfWLKw0w=
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github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091/go.mod h1:N20Z5Y8oye9a7HmytmZ+tr8Q2vlP0tAHP13kTHzwvQY=
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github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8 h1:TG/diQgUe0pntT/2D9tmUCz4VNwm9MfrtPr0SU2qSX8=
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github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8/go.mod h1:P5HUIBuIWKbyjl083/loAegFkfbFNx5i2qEP4CNbm7E=
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github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJH8j0=
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github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
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github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k=
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github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
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golang.org/x/sys v0.0.0-20190606203320-7fc4e5ec1444/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
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golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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139
main.go
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139
main.go
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package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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// "time"
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"strconv"
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"math/rand"
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"github.com/songgao/packets/ethernet"
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"github.com/songgao/water"
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"github.com/vishvananda/netlink"
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)
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type Client struct {
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ifce *water.Interface
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hostname string
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addr *netlink.Addr
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}
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// -- funcs --
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// writes out desired hostname to file. generates a small bash script for
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// the client to run
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//func generateNewClient() {
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//
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// var desired_hostname string
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// fmt.Printf("Please enter a desired hostname for the new client: ")
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//
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// scanner := bufio.NewScanner(os.Stdin)
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// scanner.Scan()
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// err := scanner.Err()
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// if err != nil {
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// log.Fatal(err)
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// panic(err)
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// }
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// desired_hostname = scanner.Text()
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//
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//
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//}
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// maps ip --> hostname
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// used to verify collisions
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var client_leases = make(map[string]string)
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func generateClientTUN(hn string) Client {
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// configure TUN interface
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config := water.Config{
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DeviceType: water.TUN,
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}
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config.Name = "tun_"+hn
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cl_ifce, err := water.New(config)
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if err != nil {
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log.Fatal(err)
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}
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// Generate a free address to assign
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var cl_Addr_str string
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// This is a bad way of doing it, and only accounts for local conflicts
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// theres definitely a way to find if it conflicts somewhere else
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// ideally, it shouldnt be locked to this 16 block, either. eventually,
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// the allowed range (CIDR included) should be defined.
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// this is an alpha for now, just to get *something* nice working
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r := rand.New(rand.NewSource(255))
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for {
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var b1 int = int(r.Int31n(255))
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var b2 int = int(r.Int31n(255))
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cl_Addr_str = "." + strconv.Itoa(b1) + "." + strconv.Itoa(b2)
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fmt.Println(cl_Addr_str)
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_, isLeased := client_leases[cl_Addr_str]
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if !isLeased {
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break
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}
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}
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cl_Link, err := netlink.LinkByName(config.Name)
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if err != nil {
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log.Fatal(err)
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}
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cl_Addr, err := netlink.ParseAddr("169.254"+cl_Addr_str+"/16")
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if err != nil {
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log.Fatal(err)
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}
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// register addr -> ifce with host
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netlink.AddrAdd(cl_Link, cl_Addr)
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return Client {
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ifce: cl_ifce,
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hostname: hn,
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addr: cl_Addr,
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}
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}
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func main() {
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var desired_hostname string
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fmt.Printf("your nosthanem is ")
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hn, _ := os.Hostname()
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fmt.Println(hn)
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fmt.Printf("Please enter a desired hostname for the new client: ")
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scanner := bufio.NewScanner(os.Stdin)
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scanner.Scan()
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err := scanner.Err()
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if err != nil {
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log.Fatal(err)
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}
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desired_hostname = scanner.Text()
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var registered_client Client = generateClientTUN(desired_hostname)
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log.Printf("interface name: %s\n", registered_client.ifce.Name())
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var frame ethernet.Frame
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ifce := registered_client.ifce
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for {
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frame.Resize(1500)
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n, err := ifce.Read([]byte(frame))
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if err != nil {
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log.Fatal(err)
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}
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frame = frame[:n]
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log.Printf("Dst: %s\n", frame.Destination())
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log.Printf("Src: %s\n", frame.Source())
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log.Printf("Ethertype: % x\n", frame.Ethertype())
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log.Printf("Payload: % x\n", frame.Payload())
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}
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// generateNewClient()
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}
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