Initial boilerplate to get some infra started

README.md

@@ -0,0 +1,39 @@
+### How to build
+
+The Corona Network protocol is written in [Go](https://golang.org/). If you want to contribute to this part of the code, you need to have a valid Go installation. We are also using [Go modules](https://blog.golang.org/using-go-modules), please familiarize yourself with them if they are new to you. You will also need a C compiler as certain dependencies of this project are in C.
+
+If you can run `go install` in the repo root successfully, you're halfway there!
+
+Go is one prerequisite, but it's not the only one. The main platform we are aiming for are mobile phones, so this project also needs to compile to them. We use [`gomobile`](https://github.com/golang/mobile/) to create the library archives that can be imported into mobile projects. You do not need to be familiar with `gomobile`, but you need to be able to run it.
+
+You can install `gomobile` via:
+
+```
+$ go get -u golang.org/x/mobile/cmd/gomobile
+$ go get -u golang.org/x/mobile/cmd/gobind
+```
+
+#### Android
+
+To build the Android library archive (`.aar`), you need to have an Android SDK and NDK installed and the `ANDROID_HOME` environment var correctly set. Please consult the Android docs if you're stuck. You might want to do it through [Android Studio](https://developer.android.com/studio). We're not going to use the Android Studio at all, but it's an easy way to manage your SDKs and Android emulators.
+
+Once Android is configured, you can build `go-coronanet` via:
+
+```
+$ gomobile bind --target android --javapkg xyz -v github.com/coronanet/go-coronanet
+```
+
+The first time you do the above, it will take a **LOT** of time. I'm not kidding, on the order of **30 minutes**, as it needs to build some humongous C dependencies for 4 different architectures (x86, x86_64, arm, arm64). The good news is that subsequent builds will be fast(er).
+
+```
+$ ls -al | grep coronanet
+
+-rw-r--r-- 1 karalabe karalabe 46961891 Mar 16 19:19 coronanet.aar
+-rw-r--r-- 1 karalabe karalabe     6383 Mar 16 19:19 coronanet-sources.jar
+```
+
+Whoa, that final binary size is insane. Yes it is, but it does contain 4 architectures + debug symbols. Long term a proper build system could make things a bit more pleasant. Optimizing app size is not relevant at this phase, simplicity and portability are more useful.
+
+#### iOS
+
+iOS is not planned for the initial MVP to keep the scope smaller. A lot of prerequisite work needs to be done on supporting infra first (`libtor`, `ghostbridge`, etc), which is wasted time until it's proven to be worth it.

backend.go

@@ -0,0 +1,79 @@
+// coronanet - Coronavirus social distancing network
+// Copyright (c) 2020 Péter Szilágyi. All rights reserved.
+
+package coronanet
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/cretz/bine/tor"
+	"github.com/ipsn/go-libtor"
+)
+
+// backend represents the social network node that can connect to other nodes in
+// the network and exchange information.
+type backend struct {
+	proxy *tor.Tor // Proxy through the Tor network, nil when offline
+
+	lock sync.RWMutex
+}
+
+// newBackend creates a new social network node.
+func newBackend() (*backend, error) {
+	return &backend{}, nil
+}
+
+// Enable creates the network proxy into the Tor network.
+func (b *backend) Enable() error {
+	// Ensure the node is not yet enabled
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	if b.proxy != nil {
+		return nil
+	}
+	// Create the Tor background process and let it bootstrap itself async.
+	proxy, err := tor.Start(nil, &tor.StartConf{ProcessCreator: libtor.Creator, UseEmbeddedControlConn: true})
+	if err != nil {
+		return err
+	}
+	b.proxy = proxy
+	return nil
+}
+
+// Disable stops and tears down the network proxy into the Tor network.
+func (b *backend) Disable() error {
+	// Ensure the node is not yet disabled
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	if b.proxy == nil {
+		return nil
+	}
+	// Proxy still functional, terminate it and return
+	if err := b.proxy.Close(); err != nil {
+		return err
+	}
+	b.proxy = nil
+	return nil
+}
+
+// Status returns whether the backend has networking enabled and the total down-
+// and upload traffic incurred since starting it.
+func (b *backend) Status() (bool, uint64, uint64, error) {
+	// If the node is offline, return all zeroes
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+
+	if b.proxy == nil {
+		return false, 0, 0, nil
+	}
+	// Tor proxy online, retrieve the current stats
+	res, err := b.proxy.Control.GetInfo("traffic/read", "traffic/written")
+	if err != nil {
+		return true, 0, 0, err
+	}
+	fmt.Println(res[0].Val, res[1].Val)
+	return true, 0, 0, nil
+}

bridge.go

@@ -0,0 +1,22 @@
+// coronanet - Coronavirus social distancing network
+// Copyright (c) 2020 Péter Szilágyi. All rights reserved.
+
+package coronanet
+
+import "github.com/ipsn/go-ghostbridge"
+
+// Bridge is a tiny struct (re)definition so gomobile will export all the built
+// in methods of the underlying ghostbridge.Bridge struct.
+type Bridge struct {
+	*ghostbridge.Bridge
+}
+
+// NewBridge creates an instance of the ghost bridge, typed such as gomobile to
+// generate a Bridge constructor out of it.
+func NewBridge() (*Bridge, error) {
+	bridge, err := ghostbridge.New(new(backend))
+	if err != nil {
+		return nil, err
+	}
+	return &Bridge{bridge}, nil
+}

go.mod

@@ -0,0 +1,12 @@
+module github.com/coronanet/go-coronanet
+
+go 1.14
+
+require (
+	github.com/cretz/bine v0.1.0
+	github.com/ipsn/go-ghostbridge v0.0.0-20190304084428-78924eea6711
+	github.com/ipsn/go-libtor v1.0.196
+	golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4 // indirect
+	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect
+	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 // indirect
+)

go.sum

@@ -0,0 +1,26 @@
+github.com/cretz/bine v0.1.0 h1:1/fvhLE+fk0bPzjdO5Ci+0ComYxEMuB1JhM4X5skT3g=
+github.com/cretz/bine v0.1.0/go.mod h1:6PF6fWAvYtwjRGkAuDEJeWNOv3a2hUouSP/yRYXmvHw=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/ipsn/go-ghostbridge v0.0.0-20190304084428-78924eea6711 h1:H4ciRFuWzihulBvcHmP+M0EksEqgAPApebL1aSA4r4o=
+github.com/ipsn/go-ghostbridge v0.0.0-20190304084428-78924eea6711/go.mod h1:hxUrR1DTnI1KNaGWoF/ZEM8dmu1aP454LeMXLZ5KmrM=
+github.com/ipsn/go-libtor v1.0.196 h1:MrGPdIXyGdTPItZwqtfI12dEES7nF6IlghbGKM2GCBQ=
+github.com/ipsn/go-libtor v1.0.196/go.mod h1:6rIeHU7irp8ZH8E/JqaEOKlD6s4vSSUh4ngHelhlSMw=
+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/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190404164418-38d8ce5564a5/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
+golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4 h1:QmwruyY+bKbDDL0BaglrbZABEali68eoMFhTZpCjYVA=
+golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20200301022130-244492dfa37a h1:GuSPYbZzB5/dcLNCwLQLsg3obCJtX9IJhpXkvY7kzk0=
+golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
+golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

service.go

@@ -0,0 +1,14 @@
+// coronanet - Coronavirus social distancing network
+// Copyright (c) 2020 Péter Szilágyi. All rights reserved.
+
+package coronanet
+
+import (
+	"net/http"
+)
+
+// ServeHTTP implements http.Handler, serving API calls from the mobile UI. It
+// exposes all the functionality of the social network via a RESTful interface
+// for react native on a mobile.
+func (b *backend) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+}