not for listeners

Fix wrong address.

.gitignore

@@ -1,2 +1,3 @@
 *~
 *.swp
+README.md.asc

I2PAddr.go

@@ -1,119 +0,0 @@
-package sam3
-
-import (
-	"crypto/sha256"
-	"encoding/base32"
-	"encoding/base64"
-	"errors"
-)
-
-
-
-var (
-	i2pB64enc *base64.Encoding = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-~")
-	i2pB32enc *base32.Encoding = base32.NewEncoding("abcdefghijklmnopqrstuvwxyz234567")
-)
-
-
-// The public and private keys associated with an I2P destination. I2P hides the
-// details of exactly what this is, so treat them as blobs, but generally: One
-// pair of DSA keys, one pair of ElGamal keys, and sometimes (almost never) also
-// a certificate. String() returns you the full content of I2PKeys and Addr() 
-// returns the public keys.
-type I2PKeys struct {
-	addr    I2PAddr       // only the public key
-	both    string        // both public and private keys
-}
-
-// Creates I2PKeys from an I2PAddr and a public/private keypair string (as 
-// generated by String().)
-func NewKeys(addr I2PAddr, both string) I2PKeys {
-	return I2PKeys{addr, both}
-}
-
-// Returns the public keys of the I2PKeys.
-func (k I2PKeys) Addr() I2PAddr {
-	return k.addr
-}
-
-// Returns the keys (both public and private), in I2Ps base64 format. Use this
-// when you create sessions.
-func (k I2PKeys) String() string {
-	return k.both
-}
-
-// I2PAddr represents an I2P destination, almost equivalent to an IP address.
-// This is the humongously huge base64 representation of such an address, which
-// really is just a pair of public keys and also maybe a certificate. (I2P hides
-// the details of exactly what it is. Read the I2P specifications for more info.)
-type I2PAddr string
-
-// Returns the base64 representation of the I2PAddr
-func (a I2PAddr) Base64() string {
-	return string(a)
-}
-
-// Returns the I2P destination (base64-encoded)
-func (a I2PAddr) String() string {
-	return string(a)
-}
-
-// Returns "I2P"
-func (a I2PAddr) Network() string {
-	return "I2P"
-}
-
-// Creates a new I2P address from a base64-encoded string. Checks if the address
-// addr is in correct format. (If you know for sure it is, use I2PAddr(addr).)
-func NewI2PAddrFromString(addr string) (I2PAddr, error) {
-	// very basic check
-	if len(addr) > 4096 || len(addr) < 516 {
-		return I2PAddr(""), errors.New("Not an I2P address")
-	}
-	buf := make([]byte, i2pB64enc.DecodedLen(len(addr)))
-	if _, err := i2pB64enc.Decode(buf, []byte(addr)); err != nil {
-		return I2PAddr(""), errors.New("Address is not base64-encoded")
-	}
-	return I2PAddr(addr), nil
-}
-
-// Creates a new I2P address from a byte array. The inverse of ToBytes().
-func NewI2PAddrFromBytes(addr []byte) (I2PAddr, error) {
-	if len(addr) > 4096 || len(addr) < 384 {
-		return I2PAddr(""), errors.New("Not an I2P address")
-	}
-	buf := make([]byte, i2pB64enc.EncodedLen(len(addr)))
-	i2pB64enc.Encode(buf, addr)
-	return I2PAddr(string(buf)), nil
-}
-
-// Turns an I2P address to a byte array. The inverse of NewI2PAddrFromBytes().
-func (addr I2PAddr) ToBytes() ([]byte, error) {
-	buf := make([]byte, i2pB64enc.DecodedLen(len(addr)))
-	if _, err := i2pB64enc.Decode(buf, []byte(addr)); err != nil {
-		return buf, errors.New("Address is not base64-encoded")
-	}
-	return buf, nil
-}
-
-// Returns the *.b32.i2p address of the I2P address. It is supposed to be a 
-// somewhat human-manageable 64 character long pseudo-domain name equivalent of 
-// the 516+ characters long default base64-address (the I2PAddr format). It is 
-// not possible to turn the base32-address back into a usable I2PAddr without 
-// performing a Lookup(). Lookup only works if you are using the I2PAddr from
-// which the b32 address was generated.
-func (addr I2PAddr) Base32() string {
-	hash := sha256.New()
-	b, _ := addr.ToBytes()
-	hash.Write(b)
-	digest := hash.Sum(nil)
-	b32addr := make([]byte, 56)
-	i2pB32enc.Encode(b32addr, digest)
-	return string(b32addr[:52]) + ".b32.i2p"
-}
-
-// Makes any string into a *.b32.i2p human-readable I2P address. This makes no
-// sense, unless "anything" is an I2P destination of some sort.
-func Base32(anything string) string {
-	return I2PAddr(anything).Base32()
-}

LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

Makefile

@@ -0,0 +1,29 @@
+
+USER_GH=eyedeekay
+VERSION=0.33.001
+packagename=sam3
+
+echo:
+	@echo "type make version to do release $(VERSION)"
+
+version:
+	gothub release -s $(GITHUB_TOKEN) -u $(USER_GH) -r $(packagename) -t v$(VERSION) -d "version $(VERSION)"
+
+del:
+	gothub delete -s $(GITHUB_TOKEN) -u $(USER_GH) -r $(packagename) -t v$(VERSION)
+
+tar:
+	tar --exclude .git \
+		--exclude .go \
+		--exclude bin \
+		-cJvf ../$(packagename)_$(VERSION).orig.tar.xz .
+
+copier:
+	echo '#! /usr/bin/env sh' > deb/copy.sh
+	echo 'for f in $$(ls); do scp $$f/*.deb user@192.168.99.106:~/DEBIAN_PKGS/$$f/main/; done' >> deb/copy.sh
+
+fmt:
+	find . -name '*.go' -exec gofmt -w -s {} \;
+
+upload-linux:
+	gothub upload -R -u $(USER_GH) -r "$(packagename)" -t $(VERSION) -l `sha256sum ` -n "$(packagename)" -f "$(packagename)"

README.md

@@ -28,8 +28,6 @@ This library is much better than ccondom (that use BOB), much more stable and mu
 
 ## Documentation ##
 
-* [Online cached version](http://godoc.org/bitbucket.org/kallevedin/sam3)
-
 * Latest version-documentation:
     * set your GOPATH
     * Enter `godoc -http=:8081` into your terminal and hit enter.
@@ -40,7 +38,7 @@ This library is much better than ccondom (that use BOB), much more stable and mu
 package main
 
 import (
-	"bitbucket.org/kallevedin/sam3"
+	"github.com/majestrate/i2p-tools/sam3"
 	"fmt"
 )
 
@@ -59,6 +57,8 @@ func client(server I2PAddr) {
 func main() {
 	sam, _ := NewSAM(yoursam)
 	keys, _ := sam.NewKeys()
+	stream, _ := sam.NewStreamSession("serverTun", keys, Options_Medium)
+	listener, _ := stream.Listen()
 	go client(keys.Addr())
 	stream, _ := sam.NewStreamSession("serverTun", keys, Options_Medium)
 	listener, _ := stream.Listen()
@@ -80,14 +80,16 @@ Error handling was omitted in the above code for readability.
 
 ## Testing ##
 
-* `go test` runs the whole suite (takes 90+ sec to perform!)
+* `go test -tags=nettest` runs the whole suite (takes 90+ sec to perform!)
 * `go test -short` runs the shorter variant, does not connect to anything
 
 ## License ##
 
 Public domain.
 
-## Authors ##
+## Author ##
 
 * Kalle Vedin `kalle.vedin@fripost.org`
 * Unknown Name (majestrate)
+* idk
+* qiwenmin

README.md.asc

@@ -0,0 +1,105 @@
+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA512
+
+# README #
+
+go library for the I2P [SAMv3.0](https://geti2p.net/en/docs/api/samv3) bridge, used to build anonymous/pseudonymous end-to-end encrypted sockets.
+
+This library is much better than ccondom (that use BOB), much more stable and much easier to maintain.
+
+## Support/TODO ##
+
+**What works:**
+
+* Utils
+    * Resolving domain names to I2P destinations
+    * .b32.i2p hashes
+    * Generating keys/i2p destinations
+* Streaming
+    * DialI2P() - Connecting to stuff in I2P
+    * Listen()/Accept() - Handling incomming connections
+    * Implements net.Conn and net.Listener
+* Datagrams
+    * Implements net.PacketConn
+* Raw datagrams
+    * Like datagrams, but without addresses
+
+**Does not work:**
+
+* Everything works! :D
+* Probably needs some real-world testing
+
+## Documentation ##
+
+* Latest version-documentation:
+    * set your GOPATH
+    * Enter `godoc -http=:8081` into your terminal and hit enter.
+    * Goto http://localhost:8081, click packages, and navigate to sam3
+
+## Examples ##
+```go
+package main
+
+import (
+	"github.com/majestrate/i2p-tools/sam3"
+	"fmt"
+)
+
+const yoursam = "127.0.0.1:7656" // sam bridge
+
+func client(server I2PAddr) {
+	sam, _ := NewSAM(yoursam)
+	keys, _ := sam.NewKeys()
+	stream, _ := sam.NewStreamSession("clientTun", keys, Options_Small)
+	fmt.Println("Client: Connecting to " + server.Base32())
+	conn, _ := stream.DialI2P(server)
+	conn.Write([]byte("Hello world!"))
+	return
+}
+
+func main() {
+	sam, _ := NewSAM(yoursam)
+	keys, _ := sam.NewKeys()
+	go client(keys.Addr())
+	stream, _ := sam.NewStreamSession("serverTun", keys, Options_Medium)
+	listener, _ := stream.Listen()
+	conn, _ := listener.Accept()
+	buf := make([]byte, 4096)
+	n, _ := conn.Read(buf)
+	fmt.Println("Server received: " + string(buf[:n]))
+}
+```
+
+The above will write to the terminal:
+
+```text
+Client: Connecting to zjnvfh4hs3et5vtz35ogwzrws26zvwkcad5uo5esecvg4qpk5b4a.b32.i2p
+Server received: Hello world!
+```
+
+Error handling was omitted in the above code for readability.
+
+## Testing ##
+
+* `go test` runs the whole suite (takes 90+ sec to perform!)
+* `go test -short` runs the shorter variant, does not connect to anything
+
+## License ##
+
+Public domain.
+
+## Author ##
+
+* Kalle Vedin `kalle.vedin@fripost.org`
+* Unknown Name (majestrate)
+-----BEGIN PGP SIGNATURE-----
+
+iQEzBAEBCgAdFiEEcNIGBzi++AUjrK/311wDs5teFOEFAlxk9W0ACgkQ11wDs5te
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+lopjX4BT4mpXN1Lvwdw+v3tTZPyuWQ==
+=lYsZ
+-----END PGP SIGNATURE-----

SAMConn.go

@@ -1,57 +1,69 @@
 package sam3
 
 import (
-	"time"
+	"github.com/eyedeekay/sam3/i2pkeys"
 	"net"
+	"time"
 )
 
+/*
+import (
+	. "github.com/eyedeekay/sam3/i2pkeys"
+)
+*/
 // Implements net.Conn
 type SAMConn struct {
-	laddr  I2PAddr
-	raddr  I2PAddr
+	laddr i2pkeys.I2PAddr
+	raddr i2pkeys.I2PAddr
 	conn  net.Conn
 }
 
 // Implements net.Conn
-func (sc SAMConn) Read(buf []byte) (int, error) {
+func (sc *SAMConn) Read(buf []byte) (int, error) {
 	n, err := sc.conn.Read(buf)
 	return n, err
 }
 
 // Implements net.Conn
-func (sc SAMConn) Write(buf []byte) (int, error) {
+func (sc *SAMConn) Write(buf []byte) (int, error) {
 	n, err := sc.conn.Write(buf)
 	return n, err
 }
 
 // Implements net.Conn
-func (sc SAMConn) Close() error {
+func (sc *SAMConn) Close() error {
 	return sc.conn.Close()
 }
 
-// Implements net.Conn
-func (sc SAMConn) LocalAddr() I2PAddr {
-	return sc.laddr
+func (sc *SAMConn) LocalAddr() net.Addr {
+	return sc.localAddr()
 }
 
 // Implements net.Conn
-func (sc SAMConn) RemoteAddr() I2PAddr {
+func (sc *SAMConn) localAddr() i2pkeys.I2PAddr {
+	return sc.laddr
+}
+
+func (sc *SAMConn) RemoteAddr() net.Addr {
+	return sc.remoteAddr()
+}
+
+// Implements net.Conn
+func (sc *SAMConn) remoteAddr() i2pkeys.I2PAddr {
 	return sc.raddr
 }
 
 // Implements net.Conn
-func (sc SAMConn) SetDeadline(t time.Time) error {
+func (sc *SAMConn) SetDeadline(t time.Time) error {
 	return sc.conn.SetDeadline(t)
 }
 
 // Implements net.Conn
-func (sc SAMConn) SetReadDeadline(t time.Time) error {
+func (sc *SAMConn) SetReadDeadline(t time.Time) error {
 	return sc.conn.SetReadDeadline(t)
 }
 
 // Implements net.Conn
-func (sc SAMConn) SetWriteDeadline(t time.Time) error {
+func (sc *SAMConn) SetWriteDeadline(t time.Time) error {
 	return sc.conn.SetWriteDeadline(t)
 }
-
-

config.go

@@ -0,0 +1,363 @@
+package sam3
+
+import (
+	"fmt"
+	"math/rand"
+	"net"
+	"strconv"
+	"strings"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
+
+// I2PConfig is a struct which manages I2P configuration options
+type I2PConfig struct {
+	SamHost string
+	SamPort string
+	TunName string
+
+	SamMin string
+	SamMax string
+
+	Fromport string
+	Toport   string
+
+	Style   string
+	TunType string
+
+	DestinationKeys i2pkeys.I2PKeys
+
+	SigType                   string
+	EncryptLeaseSet           string
+	LeaseSetKey               string
+	LeaseSetPrivateKey        string
+	LeaseSetPrivateSigningKey string
+	LeaseSetKeys              i2pkeys.I2PKeys
+	InAllowZeroHop            string
+	OutAllowZeroHop           string
+	InLength                  string
+	OutLength                 string
+	InQuantity                string
+	OutQuantity               string
+	InVariance                string
+	OutVariance               string
+	InBackupQuantity          string
+	OutBackupQuantity         string
+	FastRecieve               string
+	UseCompression            string
+	MessageReliability        string
+	CloseIdle                 string
+	CloseIdleTime             string
+	ReduceIdle                string
+	ReduceIdleTime            string
+	ReduceIdleQuantity        string
+	//Streaming Library options
+	AccessListType string
+	AccessList     []string
+}
+
+func (f *I2PConfig) Sam() string {
+	host := "127.0.0.1"
+	port := "7656"
+	if f.SamHost != "" {
+		host = f.SamHost
+	}
+	if f.SamPort != "" {
+		port = f.SamPort
+	}
+	return host + ":" + port
+}
+
+func (f *I2PConfig) SetSAMAddress(addr string) {
+	hp := strings.Split(addr, ":")
+	if len(hp) == 1 {
+		f.SamHost = hp[0]
+	} else if len(hp) == 2 {
+		f.SamPort = hp[1]
+		f.SamHost = hp[0]
+	}
+	f.SamPort = "7656"
+	f.SamHost = "127.0.0.1"
+}
+
+func (f *I2PConfig) ID() string {
+	if f.TunName == "" {
+		b := make([]byte, 12)
+		for i := range b {
+			b[i] = "abcdefghijklmnopqrstuvwxyz"[rand.Intn(len("abcdefghijklmnopqrstuvwxyz"))]
+		}
+		f.TunName = string(b)
+	}
+	return " ID=" + f.TunName + " "
+}
+
+func (f *I2PConfig) Leasesetsettings() (string, string, string) {
+	var r, s, t string
+	if f.LeaseSetKey != "" {
+		r = " i2cp.leaseSetKey=" + f.LeaseSetKey + " "
+	}
+	if f.LeaseSetPrivateKey != "" {
+		s = " i2cp.leaseSetPrivateKey=" + f.LeaseSetPrivateKey + " "
+	}
+	if f.LeaseSetPrivateSigningKey != "" {
+		t = " i2cp.leaseSetPrivateSigningKey=" + f.LeaseSetPrivateSigningKey + " "
+	}
+	return r, s, t
+}
+
+func (f *I2PConfig) FromPort() string {
+	if f.samMax() < 3.1 {
+		return ""
+	}
+	if f.Fromport != "0" {
+		return " FROM_PORT=" + f.Fromport + " "
+	}
+	return ""
+}
+
+func (f *I2PConfig) ToPort() string {
+	if f.samMax() < 3.1 {
+		return ""
+	}
+	if f.Toport != "0" {
+		return " TO_PORT=" + f.Toport + " "
+	}
+	return ""
+}
+
+func (f *I2PConfig) SessionStyle() string {
+	if f.Style != "" {
+		return " STYLE=" + f.Style + " "
+	}
+	return " STYLE=STREAM "
+}
+
+func (f *I2PConfig) samMax() float64 {
+	i, err := strconv.Atoi(f.SamMax)
+	if err != nil {
+		return 3.1
+	}
+	return float64(i)
+}
+
+func (f *I2PConfig) MinSAM() string {
+	if f.SamMin == "" {
+		return "3.0"
+	}
+	return f.SamMin
+}
+
+func (f *I2PConfig) MaxSAM() string {
+	if f.SamMax == "" {
+		return "3.1"
+	}
+	return f.SamMax
+}
+
+func (f *I2PConfig) DestinationKey() string {
+	if &f.DestinationKeys != nil {
+		return " DESTINATION=" + f.DestinationKeys.String() + " "
+	}
+	return " DESTINATION=TRANSIENT "
+}
+
+func (f *I2PConfig) SignatureType() string {
+	if f.samMax() < 3.1 {
+		return ""
+	}
+	if f.SigType != "" {
+		return " SIGNATURE_TYPE=" + f.SigType + " "
+	}
+	return ""
+}
+
+func (f *I2PConfig) EncryptLease() string {
+	if f.EncryptLeaseSet == "true" {
+		return " i2cp.encryptLeaseSet=true "
+	}
+	return ""
+}
+
+func (f *I2PConfig) Reliability() string {
+	if f.MessageReliability != "" {
+		return " i2cp.messageReliability=" + f.MessageReliability + " "
+	}
+	return ""
+}
+
+func (f *I2PConfig) Reduce() string {
+	if f.ReduceIdle == "true" {
+		return "i2cp.reduceOnIdle=" + f.ReduceIdle + "i2cp.reduceIdleTime=" + f.ReduceIdleTime + "i2cp.reduceQuantity=" + f.ReduceIdleQuantity
+	}
+	return ""
+}
+
+func (f *I2PConfig) Close() string {
+	if f.CloseIdle == "true" {
+		return "i2cp.closeOnIdle=" + f.CloseIdle + "i2cp.closeIdleTime=" + f.CloseIdleTime
+	}
+	return ""
+}
+
+func (f *I2PConfig) DoZero() string {
+	r := ""
+	if f.InAllowZeroHop == "true" {
+		r += " inbound.allowZeroHop=" + f.InAllowZeroHop + " "
+	}
+	if f.OutAllowZeroHop == "true" {
+		r += " outbound.allowZeroHop= " + f.OutAllowZeroHop + " "
+	}
+	if f.FastRecieve == "true" {
+		r += " " + f.FastRecieve + " "
+	}
+	return r
+}
+func (f *I2PConfig) Print() []string {
+	lsk, lspk, lspsk := f.Leasesetsettings()
+	return []string{
+		//f.targetForPort443(),
+		"inbound.length=" + f.InLength,
+		"outbound.length=" + f.OutLength,
+		"inbound.lengthVariance=" + f.InVariance,
+		"outbound.lengthVariance=" + f.OutVariance,
+		"inbound.backupQuantity=" + f.InBackupQuantity,
+		"outbound.backupQuantity=" + f.OutBackupQuantity,
+		"inbound.quantity=" + f.InQuantity,
+		"outbound.quantity=" + f.OutQuantity,
+		f.DoZero(),
+		//"i2cp.fastRecieve=" + f.FastRecieve,
+		"i2cp.gzip=" + f.UseCompression,
+		f.Reduce(),
+		f.Close(),
+		f.Reliability(),
+		f.EncryptLease(),
+		lsk, lspk, lspsk,
+		f.Accesslisttype(),
+		f.Accesslist(),
+	}
+}
+
+func (f *I2PConfig) Accesslisttype() string {
+	if f.AccessListType == "whitelist" {
+		return "i2cp.enableAccessList=true"
+	} else if f.AccessListType == "blacklist" {
+		return "i2cp.enableBlackList=true"
+	} else if f.AccessListType == "none" {
+		return ""
+	}
+	return ""
+}
+
+func (f *I2PConfig) Accesslist() string {
+	if f.AccessListType != "" && len(f.AccessList) > 0 {
+		r := ""
+		for _, s := range f.AccessList {
+			r += s + ","
+		}
+		return "i2cp.accessList=" + strings.TrimSuffix(r, ",")
+	}
+	return ""
+}
+
+func NewConfig(opts ...func(*I2PConfig) error) (*I2PConfig, error) {
+	var config I2PConfig
+	config.SamHost = "127.0.0.1"
+	config.SamPort = "7656"
+	config.SamMin = "3.0"
+	config.SamMax = "3.2"
+	config.TunName = ""
+	config.TunType = "server"
+	config.Style = "STREAM"
+	config.InLength = "3"
+	config.OutLength = "3"
+	config.InQuantity = "2"
+	config.OutQuantity = "2"
+	config.InVariance = "1"
+	config.OutVariance = "1"
+	config.InBackupQuantity = "3"
+	config.OutBackupQuantity = "3"
+	config.InAllowZeroHop = "false"
+	config.OutAllowZeroHop = "false"
+	config.EncryptLeaseSet = "false"
+	config.LeaseSetKey = ""
+	config.LeaseSetPrivateKey = ""
+	config.LeaseSetPrivateSigningKey = ""
+	config.FastRecieve = "false"
+	config.UseCompression = "true"
+	config.ReduceIdle = "false"
+	config.ReduceIdleTime = "15"
+	config.ReduceIdleQuantity = "4"
+	config.CloseIdle = "false"
+	config.CloseIdleTime = "300000"
+	config.MessageReliability = "none"
+	for _, o := range opts {
+		if err := o(&config); err != nil {
+			return nil, err
+		}
+	}
+	return &config, nil
+}
+
+// options map
+type Options map[string]string
+
+// obtain sam options as list of strings
+func (opts Options) AsList() (ls []string) {
+	for k, v := range opts {
+		ls = append(ls, fmt.Sprintf("%s=%s", k, v))
+	}
+	return
+}
+
+// Config is the config type for the sam connector api for i2p which allows applications to 'speak' with i2p
+type Config struct {
+	Addr    string
+	Opts    Options
+	Session string
+	Keyfile string
+}
+
+// create new sam connector from config with a stream session
+func (cfg *Config) StreamSession() (session *StreamSession, err error) {
+	// connect
+	var s *SAM
+	s, err = NewSAM(cfg.Addr)
+	if err == nil {
+		// ensure keys exist
+		var keys i2pkeys.I2PKeys
+		keys, err = s.EnsureKeyfile(cfg.Keyfile)
+		if err == nil {
+			// create session
+			session, err = s.NewStreamSession(cfg.Session, keys, cfg.Opts.AsList())
+		}
+	}
+	return
+}
+
+// create new sam datagram session from config
+func (cfg *Config) DatagramSession() (session *DatagramSession, err error) {
+	// connect
+	var s *SAM
+	s, err = NewSAM(cfg.Addr)
+	if err == nil {
+		// ensure keys exist
+		var keys i2pkeys.I2PKeys
+		keys, err = s.EnsureKeyfile(cfg.Keyfile)
+		if err == nil {
+			// determine udp port
+			var portstr string
+			_, portstr, err = net.SplitHostPort(cfg.Addr)
+			if err == nil {
+				var port int
+				port, err = strconv.Atoi(portstr)
+				if err == nil && port > 0 {
+					// udp port is 1 lower
+					port--
+					// create session
+					session, err = s.NewDatagramSession(cfg.Session, keys, cfg.Opts.AsList(), port)
+				}
+			}
+		}
+	}
+	return
+}

datagram.go

@@ -6,6 +6,8 @@ import (
 	"net"
 	"strconv"
 	"time"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
 )
 
 // The DatagramSession implements net.PacketConn. It works almost like ordinary
@@ -17,13 +19,14 @@ type DatagramSession struct {
 	id         string           // tunnel name
 	conn       net.Conn         // connection to sam bridge
 	udpconn    *net.UDPConn     // used to deliver datagrams
-	keys        I2PKeys            // i2p destination keys
+	keys       i2pkeys.I2PKeys  // i2p destination keys
 	rUDPAddr   *net.UDPAddr     // the SAM bridge UDP-port
+	remoteAddr *i2pkeys.I2PAddr // optional remote I2P address
 }
 
 // Creates a new datagram session. udpPort is the UDP port SAM is listening on,
 // and if you set it to zero, it will use SAMs standard UDP port.
-func (s *SAM) NewDatagramSession(id string, keys I2PKeys, options []string, udpPort int) (*DatagramSession, error) {
+func (s *SAM) NewDatagramSession(id string, keys i2pkeys.I2PKeys, options []string, udpPort int) (*DatagramSession, error) {
 	if udpPort > 65335 || udpPort < 0 {
 		return nil, errors.New("udpPort needs to be in the intervall 0-65335")
 	}
@@ -35,7 +38,7 @@ func (s *SAM) NewDatagramSession(id string, keys I2PKeys, options []string, udpP
 		s.Close()
 		return nil, err
 	}
-	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost + ":0")
+	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost+":0")
 	if err != nil {
 		return nil, err
 	}
@@ -48,7 +51,7 @@ func (s *SAM) NewDatagramSession(id string, keys I2PKeys, options []string, udpP
 		s.Close()
 		return nil, err
 	}
-	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost + ":" + strconv.Itoa(udpPort))
+	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost+":"+strconv.Itoa(udpPort))
 	if err != nil {
 		return nil, err
 	}
@@ -57,21 +60,51 @@ func (s *SAM) NewDatagramSession(id string, keys I2PKeys, options []string, udpP
 	if err != nil {
 		return nil, err
 	}
-	return &DatagramSession{s.address, id, conn, udpconn, keys, rUDPAddr}, nil
+	return &DatagramSession{s.address, id, conn, udpconn, keys, rUDPAddr, nil}, nil
+}
+
+func (s *DatagramSession) B32() string {
+	return s.keys.Addr().Base32()
+}
+
+func (s *DatagramSession) Dial(net string, addr string) (*DatagramSession, error) {
+	netaddr, err := s.Lookup(addr)
+	if err != nil {
+		return nil, err
+	}
+	return s.DialI2PRemote(net, netaddr)
+}
+
+func (s *DatagramSession) DialRemote(net, addr string) (net.PacketConn, error) {
+	netaddr, err := s.Lookup(addr)
+	if err != nil {
+		return nil, err
+	}
+	return s.DialI2PRemote(net, netaddr)
+}
+
+func (s *DatagramSession) DialI2PRemote(net string, addr net.Addr) (*DatagramSession, error) {
+	s.remoteAddr = addr.(*i2pkeys.I2PAddr)
+	return s, nil
+}
+
+func (s *DatagramSession) RemoteAddr() net.Addr {
+	return s.remoteAddr
 }
 
 // Reads one datagram sent to the destination of the DatagramSession. Returns
 // the number of bytes read, from what address it was sent, or an error.
-func (s *DatagramSession) ReadFrom(b []byte) (n int, addr I2PAddr, err error) {
+// implements net.PacketConn
+func (s *DatagramSession) ReadFrom(b []byte) (n int, addr net.Addr, err error) {
 	// extra bytes to read the remote address of incomming datagram
-	buf := make([]byte, len(b) + 4096)
+	buf := make([]byte, len(b)+4096)
 
 	for {
 		// very basic protection: only accept incomming UDP messages from the IP of the SAM bridge
 		var saddr *net.UDPAddr
 		n, saddr, err = s.udpconn.ReadFromUDP(buf)
 		if err != nil {
-			return 0, I2PAddr(""), err
+			return 0, i2pkeys.I2PAddr(""), err
 		}
 		if bytes.Equal(saddr.IP, s.rUDPAddr.IP) {
 			continue
@@ -80,32 +113,45 @@ func (s *DatagramSession) ReadFrom(b []byte) (n int, addr I2PAddr, err error) {
 	}
 	i := bytes.IndexByte(buf, byte('\n'))
 	if i > 4096 || i > n {
-		return 0, I2PAddr(""), errors.New("Could not parse incomming message remote address.")
+		return 0, i2pkeys.I2PAddr(""), errors.New("Could not parse incomming message remote address.")
 	}
-	raddr, err := NewI2PAddrFromString(string(buf[:i]))
+	raddr, err := i2pkeys.NewI2PAddrFromString(string(buf[:i]))
 	if err != nil {
-		return 0, I2PAddr(""), errors.New("Could not parse incomming message remote address: " + err.Error())
+		return 0, i2pkeys.I2PAddr(""), errors.New("Could not parse incomming message remote address: " + err.Error())
 	}
 	// shift out the incomming address to contain only the data received
-	if ( n - i+1 ) > len(b) {
+	if (n - i + 1) > len(b) {
 		copy(b, buf[i+1:i+1+len(b)])
-		return n-(i+1), raddr, errors.New("Datagram did not fit into your buffer.")
+		return n - (i + 1), raddr, errors.New("Datagram did not fit into your buffer.")
 	} else {
 		copy(b, buf[i+1:n])
-		return n-(i+1), raddr, nil
+		return n - (i + 1), raddr, nil
 	}
 }
 
+func (s *DatagramSession) Accept() (net.Conn, error) {
+	return s, nil
+}
+
+func (s *DatagramSession) Read(b []byte) (n int, err error) {
+	rint, _, rerr := s.ReadFrom(b)
+	return rint, rerr
+}
+
 // Sends one signed datagram to the destination specified. At the time of
 // writing, maximum size is 31 kilobyte, but this may change in the future.
 // Implements net.PacketConn.
-func (s *DatagramSession) WriteTo(b []byte, addr I2PAddr) (n int, err error) {
-	header := []byte("3.0 " + s.id + " " + addr.String() + "\n")
+func (s *DatagramSession) WriteTo(b []byte, addr net.Addr) (n int, err error) {
+	header := []byte("3.1 " + s.id + " " + addr.String() + "\n")
 	msg := append(header, b...)
 	n, err = s.udpconn.WriteToUDP(msg, s.rUDPAddr)
 	return n, err
 }
 
+func (s *DatagramSession) Write(b []byte) (int, error) {
+	return s.WriteTo(b, s.remoteAddr)
+}
+
 // Closes the DatagramSession. Implements net.PacketConn
 func (s *DatagramSession) Close() error {
 	err := s.conn.Close()
@@ -116,11 +162,30 @@ func (s *DatagramSession) Close() error {
 	return err2
 }
 
-// Returns the I2P destination of the DatagramSession. Implements net.PacketConn
-func (s *DatagramSession) LocalAddr() I2PAddr {
+// Returns the I2P destination of the DatagramSession.
+func (s *DatagramSession) LocalI2PAddr() i2pkeys.I2PAddr {
 	return s.keys.Addr()
 }
 
+// Implements net.PacketConn
+func (s *DatagramSession) LocalAddr() net.Addr {
+	return s.LocalI2PAddr()
+}
+
+func (s *DatagramSession) Addr() net.Addr {
+	return s.LocalI2PAddr()
+}
+
+func (s *DatagramSession) Lookup(name string) (a net.Addr, err error) {
+	var sam *SAM
+	sam, err = NewSAM(s.samAddr)
+	if err == nil {
+		defer sam.Close()
+		a, err = sam.Lookup(name)
+	}
+	return
+}
+
 // Sets read and write deadlines for the DatagramSession. Implements
 // net.PacketConn and does the same thing. Setting write deadlines for datagrams
 // is seldom done.
@@ -138,4 +203,6 @@ func (s *DatagramSession) SetWriteDeadline(t time.Time) error {
 	return s.udpconn.SetWriteDeadline(t)
 }
 
-
+func (s *DatagramSession) SetWriteBuffer(bytes int) error {
+	return s.udpconn.SetWriteBuffer(bytes)
+}

datagram_test.go

@@ -1,12 +1,14 @@
+// +build nettest
+
 package sam3
 
 import (
 	"fmt"
+	"log"
 	"testing"
 	"time"
 )
 
-
 func Test_DatagramServerClient(t *testing.T) {
 	if testing.Short() {
 		return
@@ -24,7 +26,7 @@ func Test_DatagramServerClient(t *testing.T) {
 		t.Fail()
 		return
 	}
-//	fmt.Println("\tServer: My address: " + keys.Addr().Base32())
+	//	fmt.Println("\tServer: My address: " + keys.Addr().Base32())
 	fmt.Println("\tServer: Creating tunnel")
 	ds, err := sam.NewDatagramSession("DGserverTun", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"}, 0)
 	if err != nil {
@@ -33,7 +35,7 @@ func Test_DatagramServerClient(t *testing.T) {
 		return
 	}
 	c, w := make(chan bool), make(chan bool)
-	go func(c, w chan(bool)) { 
+	go func(c, w chan (bool)) {
 		sam2, err := NewSAM(yoursam)
 		if err != nil {
 			c <- false
@@ -52,12 +54,12 @@ func Test_DatagramServerClient(t *testing.T) {
 			return
 		}
 		defer ds2.Close()
-//		fmt.Println("\tClient: Servers address: " + ds.LocalAddr().Base32())
-//		fmt.Println("\tClient: Clients address: " + ds2.LocalAddr().Base32())
+		//		fmt.Println("\tClient: Servers address: " + ds.LocalAddr().Base32())
+		//		fmt.Println("\tClient: Clients address: " + ds2.LocalAddr().Base32())
 		fmt.Println("\tClient: Tries to send datagram to server")
 		for {
 			select {
-				default :
+			default:
 				_, err = ds2.WriteTo([]byte("Hello datagram-world! <3 <3 <3 <3 <3 <3"), ds.LocalAddr())
 				if err != nil {
 					fmt.Println("\tClient: Failed to send datagram: " + err.Error())
@@ -65,7 +67,7 @@ func Test_DatagramServerClient(t *testing.T) {
 					return
 				}
 				time.Sleep(5 * time.Second)
-				case <-w :
+			case <-w:
 				fmt.Println("\tClient: Sent datagram, quitting.")
 				return
 			}
@@ -82,14 +84,9 @@ func Test_DatagramServerClient(t *testing.T) {
 		return
 	}
 	fmt.Println("\tServer: Received datagram: " + string(buf[:n]))
-//	fmt.Println("\tServer: Senders address was: " + saddr.Base32())
+	//	fmt.Println("\tServer: Senders address was: " + saddr.Base32())
 }
 
-
-
-
-
-
 func ExampleDatagramSession() {
 	// Creates a new DatagramSession, which behaves just like a net.PacketConn.
 
@@ -128,6 +125,7 @@ func ExampleDatagramSession() {
 		fmt.Println(err.Error())
 		return
 	}
+	log.Println("Got message: '" + string(buf[:n]) + "'")
 	fmt.Println("Got message: " + string(buf[:n]))
 
 	return
@@ -135,3 +133,53 @@ func ExampleDatagramSession() {
 	//Got message: Hello myself!
 }
 
+func ExampleMiniDatagramSession() {
+	// Creates a new DatagramSession, which behaves just like a net.PacketConn.
+
+	const samBridge = "127.0.0.1:7656"
+
+	sam, err := NewSAM(samBridge)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	keys, err := sam.NewKeys()
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	myself := keys.Addr()
+
+	// See the example Option_* variables.
+	dg, err := sam.NewDatagramSession("MINIDGTUN", keys, Options_Small, 0)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	someone, err := sam.Lookup("zzz.i2p")
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	err = dg.SetWriteBuffer(14 * 1024)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	dg.WriteTo([]byte("Hello stranger!"), someone)
+	dg.WriteTo([]byte("Hello myself!"), myself)
+
+	buf := make([]byte, 31*1024)
+	n, _, err := dg.ReadFrom(buf)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	log.Println("Got message: '" + string(buf[:n]) + "'")
+	fmt.Println("Got message: " + string(buf[:n]))
+
+	return
+	// Output:
+	//Got message: Hello myself!
+}

debian/changelog

@@ -0,0 +1,59 @@
+golang-github-eyedeekay-sam3 (0.3.2.32) unreleased; urgency=medium
+
+  [ idk ]
+  * Include "Convenience Functions" in /helper
+
+ -- idk <hankhill19580@gmail.com>  Sun, 22 Nov 2020 12:49:13 -0500
+
+golang-github-eyedeekay-sam3 (0.3.2.31) unreleased; urgency=medium
+
+  [ idk ]
+  * Incorporate address fix from qiwenmin
+  * Shortcut for saving keys to text file
+
+ -- idk <hankhill19580@gmail.com>  Sun, 18 Oct 2020 1:01:03 -0500
+
+golang-github-eyedeekay-sam3 (0.3.2.3) unreleased; urgency=medium
+
+  [ idk ]
+  * Purge ramp, re-release
+
+ -- idk <hankhill19580@gmail.com>  Mon, 22 Jun 2020 17:55:03 -0500
+
+golang-github-eyedeekay-sam3 (0.3.2.2) bionic; urgency=medium
+
+  [ idk ]
+  * Purge ramp
+
+ -- idk <hankhill19580@gmail.com>  Sat, 7 Dec 2019 22:05:34 -0500
+
+
+golang-github-eyedeekay-sam3 (0.3.2.1) bionic; urgency=medium
+
+  [ idk ]
+  * Add support for 44-character destination hashes.
+
+ -- idk <hankhill19580@gmail.com>  Sat, 7 Dec 2019 17:30:30 -0500
+
+
+golang-github-eyedeekay-sam3 (0.3.2.01) bionic; urgency=medium
+
+  [ idk ]
+  * completely remove the old i2pkeys version and replace it with the new one.
+
+ -- idk <hankhill19580@gmail.com>  Sat, 25 May 2019 14:38:11 -0500
+
+golang-github-eyedeekay-sam3 (0.3.2.0) bionic; urgency=medium
+
+  [ idk ]
+  * Bug fixes, create stable branch
+  * Move i2pkeys
+
+ -- idk <hankhill19580@gmail.com>  Sat, 18 May 2019 18:32:51 -0500
+
+golang-github-eyedeekay-sam3 (0.0~git20190223.af5a3f3) bionic; urgency=medium
+
+  [ idk ]
+  * Initial release (Closes: TODO)
+
+ -- idk <hankhill19580@gmail.com>  Thu, 28 Feb 2019 21:40:35 -0500

debian/compat

@@ -0,0 +1 @@
+11

debian/control

@@ -0,0 +1,25 @@
+Source: golang-github-eyedeekay-sam3
+Section: devel
+Priority: optional
+Maintainer: Debian Go Packaging Team <team+pkg-go@tracker.debian.org>
+Uploaders: idk <hankhill19580@gmail.com>
+Build-Depends: debhelper (>= 11),
+               dh-golang,
+               git,
+               golang-any | golang-go,
+Standards-Version: 4.2.1
+Homepage: https://github.com/eyedeekay/sam3
+Vcs-Browser: https://github.com/eyedeekay/sam3
+Vcs-Git: https://github.com/eyedeekay/sam3.git
+XS-Go-Import-Path: github.com/eyedeekay/sam3
+Testsuite: autopkgtest-pkg-go
+
+Package: golang-github-eyedeekay-sam3-dev
+Architecture: all
+Depends: ${misc:Depends},
+    i2p | i2pd
+Description: Go library for the I2P SAMv3.0 bridge,
+ used to build anonymous/pseudonymous end-to-end encrypted sockets.
+ README go library for the I2P SAMv3.0
+ (https://geti2p.net/en/docs/api/samv3) bridge, used to build
+ anonymous/pseudonymous end-to-end encrypted sockets.

debian/copyright

@@ -0,0 +1,17 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: sam3
+Source: https://github.com/eyedeekay/sam3
+Files-Excluded:
+  Godeps/_workspace
+
+Files: *
+Copyright: 2016 idk
+License: TODO
+
+Files: debian/*
+Copyright: 2019 idk <hankhill19580@gmail.com>
+License: TODO
+Comment: Debian packaging is licensed under the same terms as upstream
+
+License: TODO
+TODO

debian/files

@@ -0,0 +1 @@
+golang-github-eyedeekay-sam3_0.3.2.32_source.buildinfo devel optional

debian/gbp.conf

@@ -0,0 +1,2 @@
+[DEFAULT]
+pristine-tar = True

debian/rules

@@ -0,0 +1,4 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@ --buildsystem=golang --with=golang

debian/source/format

@@ -0,0 +1 @@
+3.0 (native)

debian/watch

@@ -0,0 +1,4 @@
+version=4
+opts=filenamemangle=s/.+\/v?(\d\S*)\.tar\.gz/golang-github-eyedeekay-sam3-\$1\.tar\.gz/,\
+uversionmangle=s/(\d)[_\.\-\+]?(RC|rc|pre|dev|beta|alpha)[.]?(\d*)$/\$1~\$2\$3/ \
+  https://github.com/eyedeekay/sam3/tags .*/v?(\d\S*)\.tar\.gz

emit-options.go

@@ -0,0 +1,369 @@
+package sam3
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+//Option is a SAMEmit Option
+type Option func(*SAMEmit) error
+
+//SetType sets the type of the forwarder server
+func SetType(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if s == "STREAM" {
+			c.Style = s
+			return nil
+		} else if s == "DATAGRAM" {
+			c.Style = s
+			return nil
+		} else if s == "RAW" {
+			c.Style = s
+			return nil
+		}
+		return fmt.Errorf("Invalid session STYLE=%s, must be STREAM, DATAGRAM, or RAW", s)
+	}
+}
+
+// SetSAMAddress sets the SAM address all-at-once
+func SetSAMAddress(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		sp := strings.Split(s, ":")
+		if len(sp) > 2 {
+			return fmt.Errorf("Invalid address string: %s", sp)
+		}
+		if len(sp) == 2 {
+			c.I2PConfig.SamPort = sp[1]
+		}
+		c.I2PConfig.SamHost = sp[0]
+		return nil
+	}
+}
+
+//SetSAMHost sets the host of the SAMEmit's SAM bridge
+func SetSAMHost(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.SamHost = s
+		return nil
+	}
+}
+
+//SetSAMPort sets the port of the SAMEmit's SAM bridge using a string
+func SetSAMPort(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		port, err := strconv.Atoi(s)
+		if err != nil {
+			return fmt.Errorf("Invalid SAM Port %s; non-number", s)
+		}
+		if port < 65536 && port > -1 {
+			c.I2PConfig.SamPort = s
+			return nil
+		}
+		return fmt.Errorf("Invalid port")
+	}
+}
+
+//SetName sets the host of the SAMEmit's SAM bridge
+func SetName(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.TunName = s
+		return nil
+	}
+}
+
+//SetInLength sets the number of hops inbound
+func SetInLength(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u < 7 && u >= 0 {
+			c.I2PConfig.InLength = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid inbound tunnel length")
+	}
+}
+
+//SetOutLength sets the number of hops outbound
+func SetOutLength(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u < 7 && u >= 0 {
+			c.I2PConfig.OutLength = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid outbound tunnel length")
+	}
+}
+
+//SetInVariance sets the variance of a number of hops inbound
+func SetInVariance(i int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if i < 7 && i > -7 {
+			c.I2PConfig.InVariance = strconv.Itoa(i)
+			return nil
+		}
+		return fmt.Errorf("Invalid inbound tunnel length")
+	}
+}
+
+//SetOutVariance sets the variance of a number of hops outbound
+func SetOutVariance(i int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if i < 7 && i > -7 {
+			c.I2PConfig.OutVariance = strconv.Itoa(i)
+			return nil
+		}
+		return fmt.Errorf("Invalid outbound tunnel variance")
+	}
+}
+
+//SetInQuantity sets the inbound tunnel quantity
+func SetInQuantity(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u <= 16 && u > 0 {
+			c.I2PConfig.InQuantity = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid inbound tunnel quantity")
+	}
+}
+
+//SetOutQuantity sets the outbound tunnel quantity
+func SetOutQuantity(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u <= 16 && u > 0 {
+			c.I2PConfig.OutQuantity = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid outbound tunnel quantity")
+	}
+}
+
+//SetInBackups sets the inbound tunnel backups
+func SetInBackups(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u < 6 && u >= 0 {
+			c.I2PConfig.InBackupQuantity = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid inbound tunnel backup quantity")
+	}
+}
+
+//SetOutBackups sets the inbound tunnel backups
+func SetOutBackups(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u < 6 && u >= 0 {
+			c.I2PConfig.OutBackupQuantity = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid outbound tunnel backup quantity")
+	}
+}
+
+//SetEncrypt tells the router to use an encrypted leaseset
+func SetEncrypt(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.EncryptLeaseSet = "true"
+			return nil
+		}
+		c.I2PConfig.EncryptLeaseSet = "false"
+		return nil
+	}
+}
+
+//SetLeaseSetKey sets the host of the SAMEmit's SAM bridge
+func SetLeaseSetKey(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.LeaseSetKey = s
+		return nil
+	}
+}
+
+//SetLeaseSetPrivateKey sets the host of the SAMEmit's SAM bridge
+func SetLeaseSetPrivateKey(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.LeaseSetPrivateKey = s
+		return nil
+	}
+}
+
+//SetLeaseSetPrivateSigningKey sets the host of the SAMEmit's SAM bridge
+func SetLeaseSetPrivateSigningKey(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.LeaseSetPrivateSigningKey = s
+		return nil
+	}
+}
+
+//SetMessageReliability sets the host of the SAMEmit's SAM bridge
+func SetMessageReliability(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.MessageReliability = s
+		return nil
+	}
+}
+
+//SetAllowZeroIn tells the tunnel to accept zero-hop peers
+func SetAllowZeroIn(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.InAllowZeroHop = "true"
+			return nil
+		}
+		c.I2PConfig.InAllowZeroHop = "false"
+		return nil
+	}
+}
+
+//SetAllowZeroOut tells the tunnel to accept zero-hop peers
+func SetAllowZeroOut(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.OutAllowZeroHop = "true"
+			return nil
+		}
+		c.I2PConfig.OutAllowZeroHop = "false"
+		return nil
+	}
+}
+
+//SetCompress tells clients to use compression
+func SetCompress(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.UseCompression = "true"
+			return nil
+		}
+		c.I2PConfig.UseCompression = "false"
+		return nil
+	}
+}
+
+//SetFastRecieve tells clients to use compression
+func SetFastRecieve(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.FastRecieve = "true"
+			return nil
+		}
+		c.I2PConfig.FastRecieve = "false"
+		return nil
+	}
+}
+
+//SetReduceIdle tells the connection to reduce it's tunnels during extended idle time.
+func SetReduceIdle(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.ReduceIdle = "true"
+			return nil
+		}
+		c.I2PConfig.ReduceIdle = "false"
+		return nil
+	}
+}
+
+//SetReduceIdleTime sets the time to wait before reducing tunnels to idle levels
+func SetReduceIdleTime(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.ReduceIdleTime = "300000"
+		if u >= 6 {
+			c.I2PConfig.ReduceIdleTime = strconv.Itoa((u * 60) * 1000)
+			return nil
+		}
+		return fmt.Errorf("Invalid reduce idle timeout(Measured in minutes) %v", u)
+	}
+}
+
+//SetReduceIdleTimeMs sets the time to wait before reducing tunnels to idle levels in milliseconds
+func SetReduceIdleTimeMs(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.ReduceIdleTime = "300000"
+		if u >= 300000 {
+			c.I2PConfig.ReduceIdleTime = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid reduce idle timeout(Measured in milliseconds) %v", u)
+	}
+}
+
+//SetReduceIdleQuantity sets minimum number of tunnels to reduce to during idle time
+func SetReduceIdleQuantity(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if u < 5 {
+			c.I2PConfig.ReduceIdleQuantity = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid reduce tunnel quantity")
+	}
+}
+
+//SetCloseIdle tells the connection to close it's tunnels during extended idle time.
+func SetCloseIdle(b bool) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if b {
+			c.I2PConfig.CloseIdle = "true"
+			return nil
+		}
+		c.I2PConfig.CloseIdle = "false"
+		return nil
+	}
+}
+
+//SetCloseIdleTime sets the time to wait before closing tunnels to idle levels
+func SetCloseIdleTime(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.CloseIdleTime = "300000"
+		if u >= 6 {
+			c.I2PConfig.CloseIdleTime = strconv.Itoa((u * 60) * 1000)
+			return nil
+		}
+		return fmt.Errorf("Invalid close idle timeout(Measured in minutes) %v", u)
+	}
+}
+
+//SetCloseIdleTimeMs sets the time to wait before closing tunnels to idle levels in milliseconds
+func SetCloseIdleTimeMs(u int) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		c.I2PConfig.CloseIdleTime = "300000"
+		if u >= 300000 {
+			c.I2PConfig.CloseIdleTime = strconv.Itoa(u)
+			return nil
+		}
+		return fmt.Errorf("Invalid close idle timeout(Measured in milliseconds) %v", u)
+	}
+}
+
+//SetAccessListType tells the system to treat the AccessList as a whitelist
+func SetAccessListType(s string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if s == "whitelist" {
+			c.I2PConfig.AccessListType = "whitelist"
+			return nil
+		} else if s == "blacklist" {
+			c.I2PConfig.AccessListType = "blacklist"
+			return nil
+		} else if s == "none" {
+			c.I2PConfig.AccessListType = ""
+			return nil
+		} else if s == "" {
+			c.I2PConfig.AccessListType = ""
+			return nil
+		}
+		return fmt.Errorf("Invalid Access list type(whitelist, blacklist, none)")
+	}
+}
+
+//SetAccessList tells the system to treat the AccessList as a whitelist
+func SetAccessList(s []string) func(*SAMEmit) error {
+	return func(c *SAMEmit) error {
+		if len(s) > 0 {
+			for _, a := range s {
+				c.I2PConfig.AccessList = append(c.I2PConfig.AccessList, a)
+			}
+			return nil
+		}
+		return nil
+	}
+}

emit.go

@@ -0,0 +1,98 @@
+package sam3
+
+import (
+	"fmt"
+	"log"
+)
+
+type SAMEmit struct {
+	I2PConfig
+}
+
+func (e *SAMEmit) OptStr() string {
+	optStr := ""
+	for _, opt := range e.I2PConfig.Print() {
+		optStr += opt + " "
+	}
+	return optStr
+}
+
+func (e *SAMEmit) Hello() string {
+	return fmt.Sprintf("HELLO VERSION MIN=%s MAX=%s \n", e.I2PConfig.MinSAM(), e.I2PConfig.MaxSAM())
+}
+
+func (e *SAMEmit) HelloBytes() []byte {
+	return []byte(e.Hello())
+}
+
+func (e *SAMEmit) GenerateDestination() string {
+	return fmt.Sprintf("DEST GENERATE %s \n", e.I2PConfig.SignatureType())
+}
+
+func (e *SAMEmit) GenerateDestinationBytes() []byte {
+	return []byte(e.GenerateDestination())
+}
+
+func (e *SAMEmit) Lookup(name string) string {
+	return fmt.Sprintf("NAMING LOOKUP NAME=%s \n", name)
+}
+
+func (e *SAMEmit) LookupBytes(name string) []byte {
+	return []byte(e.Lookup(name))
+}
+
+func (e *SAMEmit) Create() string {
+	return fmt.Sprintf(
+		//             //1 2 3 4 5 6 7
+		"SESSION CREATE %s%s%s%s%s%s%s \n",
+		e.I2PConfig.SessionStyle(),   //1
+		e.I2PConfig.FromPort(),       //2
+		e.I2PConfig.ToPort(),         //3
+		e.I2PConfig.ID(),             //4
+		e.I2PConfig.DestinationKey(), // 5
+		e.I2PConfig.SignatureType(),  // 6
+		e.OptStr(),                   // 7
+	)
+}
+
+func (e *SAMEmit) CreateBytes() []byte {
+	log.Println("sam command: " + e.Create())
+	return []byte(e.Create())
+}
+
+func (e *SAMEmit) Connect(dest string) string {
+	return fmt.Sprintf(
+		"STREAM CONNECT ID=%s %s %s DESTINATION=%s \n",
+		e.I2PConfig.ID(),
+		e.I2PConfig.FromPort(),
+		e.I2PConfig.ToPort(),
+		dest,
+	)
+}
+
+func (e *SAMEmit) ConnectBytes(dest string) []byte {
+	return []byte(e.Connect(dest))
+}
+
+func (e *SAMEmit) Accept() string {
+	return fmt.Sprintf(
+		"STREAM ACCEPT ID=%s %s %s",
+		e.I2PConfig.ID(),
+		e.I2PConfig.FromPort(),
+		e.I2PConfig.ToPort(),
+	)
+}
+
+func (e *SAMEmit) AcceptBytes() []byte {
+	return []byte(e.Accept())
+}
+
+func NewEmit(opts ...func(*SAMEmit) error) (*SAMEmit, error) {
+	var emit SAMEmit
+	for _, o := range opts {
+		if err := o(&emit); err != nil {
+			return nil, err
+		}
+	}
+	return &emit, nil
+}

go.mod

@@ -0,0 +1,12 @@
+module github.com/eyedeekay/sam3
+
+go 1.12
+
+require (
+	github.com/eyedeekay/goSam v0.32.31-0.20210122211817-f97683379f23
+	github.com/google/renameio v1.0.0 // indirect
+	github.com/riobard/go-x25519 v0.0.0-20190716001027-10cc4d8d0b33
+	github.com/rogpeppe/go-internal v1.6.2 // indirect
+	golang.org/x/tools v0.0.0-20201125231158-b5590deeca9b // indirect
+	honnef.co/go/tools v0.0.1-2020.1.6 // indirect
+)

go.sum

@@ -0,0 +1,88 @@
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+github.com/cryptix/goSam v0.1.0 h1:lKXtrTv3Kd6+eIuNtcq3zPShJEVRqw+lQwmh49HmC7k=
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helper/helper.go

@@ -0,0 +1,162 @@
+package sam
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net"
+	"os"
+
+	"github.com/eyedeekay/sam3"
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
+
+func NetListener(name, samaddr, keyspath string) (net.Listener, error) {
+	return I2PListener(name, samaddr, keyspath)
+}
+
+// I2PListener is a convenience function which takes a SAM tunnel name, a SAM address and a filename.
+// If the file contains I2P keys, it will create a service using that address. If the file does not
+// exist, keys will be generated and stored in that file.
+func I2PListener(name, samaddr, keyspath string) (*sam3.StreamListener, error) {
+	log.Printf("Starting and registering I2P service, please wait a couple of minutes...")
+	listener, err := I2PStreamSession(name, samaddr, keyspath)
+
+	if keyspath != "" {
+		err = ioutil.WriteFile(keyspath+".i2p.public.txt", []byte(listener.Keys().Addr().Base32()), 0644)
+		if err != nil {
+			return nil, fmt.Errorf("error storing I2P base32 address in adjacent text file, %s", err)
+		}
+	}
+	return listener.Listen() //, err
+}
+
+// I2PStreamSession is a convenience function which returns a sam3.StreamSession instead
+// of a sam3.StreamListener. It also takes care of setting a persisitent key on behalf
+// of the user.
+func I2PStreamSession(name, samaddr, keyspath string) (*sam3.StreamSession, error) {
+	log.Printf("Starting and registering I2P session...")
+	sam, err := sam3.NewSAM(samaddr)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to SAM to %s: %s", samaddr, err)
+	}
+	var keys *i2pkeys.I2PKeys
+	if keyspath != "" {
+		if _, err := os.Stat(keyspath + ".i2p.private"); os.IsNotExist(err) {
+			f, err := os.Create(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to open I2P keyfile for writing: %s", err)
+			}
+			defer f.Close()
+			tkeys, err := sam.NewKeys()
+			if err != nil {
+				return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+			}
+			keys = &tkeys
+			err = i2pkeys.StoreKeysIncompat(*keys, f)
+			if err != nil {
+				return nil, fmt.Errorf("unable to save newly generated I2P Keys, %s", err)
+			}
+		} else {
+			tkeys, err := i2pkeys.LoadKeys(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to load I2P Keys: %e", err)
+			}
+			keys = &tkeys
+		}
+	} else {
+		tkeys, err := sam.NewKeys()
+		if err != nil {
+			return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+		}
+		keys = &tkeys
+	}
+	stream, err := sam.NewStreamSession(name, *keys, sam3.Options_Medium)
+	return stream, err
+}
+
+// I2PDataGramsession is a convenience function which returns a sam3.DatagramSession.
+// It also takes care of setting a persisitent key on behalf of the user.
+func I2PDatagramSession(name, samaddr, keyspath string) (*sam3.DatagramSession, error) {
+	log.Printf("Starting and registering I2P session...")
+	sam, err := sam3.NewSAM(samaddr)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to SAM to %s: %s", samaddr, err)
+	}
+	var keys *i2pkeys.I2PKeys
+	if keyspath != "" {
+		if _, err := os.Stat(keyspath + ".i2p.private"); os.IsNotExist(err) {
+			f, err := os.Create(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to open I2P keyfile for writing: %s", err)
+			}
+			defer f.Close()
+			tkeys, err := sam.NewKeys()
+			if err != nil {
+				return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+			}
+			keys = &tkeys
+			err = i2pkeys.StoreKeysIncompat(*keys, f)
+			if err != nil {
+				return nil, fmt.Errorf("unable to save newly generated I2P Keys, %s", err)
+			}
+		} else {
+			tkeys, err := i2pkeys.LoadKeys(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to load I2P Keys: %e", err)
+			}
+			keys = &tkeys
+		}
+	} else {
+		tkeys, err := sam.NewKeys()
+		if err != nil {
+			return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+		}
+		keys = &tkeys
+	}
+	gram, err := sam.NewDatagramSession(name, *keys, sam3.Options_Medium, 0)
+	return gram, err
+}
+
+// I2PPrimarySession is a convenience function which returns a sam3.PrimarySession.
+// It also takes care of setting a persisitent key on behalf of the user.
+func I2PPrimarySession(name, samaddr, keyspath string) (*sam3.PrimarySession, error) {
+	log.Printf("Starting and registering I2P session...")
+	sam, err := sam3.NewSAM(samaddr)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to SAM to %s: %s", samaddr, err)
+	}
+	var keys *i2pkeys.I2PKeys
+	if keyspath != "" {
+		if _, err := os.Stat(keyspath + ".i2p.private"); os.IsNotExist(err) {
+			f, err := os.Create(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to open I2P keyfile for writing: %s", err)
+			}
+			defer f.Close()
+			tkeys, err := sam.NewKeys()
+			if err != nil {
+				return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+			}
+			keys = &tkeys
+			err = i2pkeys.StoreKeysIncompat(*keys, f)
+			if err != nil {
+				return nil, fmt.Errorf("unable to save newly generated I2P Keys, %s", err)
+			}
+		} else {
+			tkeys, err := i2pkeys.LoadKeys(keyspath + ".i2p.private")
+			if err != nil {
+				return nil, fmt.Errorf("unable to load I2P Keys: %e", err)
+			}
+			keys = &tkeys
+		}
+	} else {
+		tkeys, err := sam.NewKeys()
+		if err != nil {
+			return nil, fmt.Errorf("unable to generate I2P Keys, %s", err)
+		}
+		keys = &tkeys
+	}
+	gram, err := sam.NewPrimarySession(name, *keys, sam3.Options_Medium)
+	return gram, err
+}

i2pkeys/I2PAddr.go

@@ -0,0 +1,334 @@
+package i2pkeys
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/base32"
+	"encoding/base64"
+	"errors"
+	"io"
+	"os"
+	"strings"
+
+	"github.com/eyedeekay/goSam"
+)
+
+var (
+	i2pB64enc *base64.Encoding = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-~")
+	i2pB32enc *base32.Encoding = base32.NewEncoding("abcdefghijklmnopqrstuvwxyz234567")
+)
+
+var FakePort = false
+
+// The public and private keys associated with an I2P destination. I2P hides the
+// details of exactly what this is, so treat them as blobs, but generally: One
+// pair of DSA keys, one pair of ElGamal keys, and sometimes (almost never) also
+// a certificate. String() returns you the full content of I2PKeys and Addr()
+// returns the public keys.
+type I2PKeys struct {
+	Address I2PAddr // only the public key
+	Both    string  // both public and private keys
+}
+
+// Creates I2PKeys from an I2PAddr and a public/private keypair string (as
+// generated by String().)
+func NewKeys(addr I2PAddr, both string) I2PKeys {
+	return I2PKeys{addr, both}
+}
+
+// fileExists checks if a file exists and is not a directory before we
+// try using it to prevent further errors.
+func fileExists(filename string) (bool, error) {
+	info, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return false, nil
+	} else if err != nil {
+		return false, err
+	}
+	return !info.IsDir(), nil
+}
+
+// load keys from non standard format
+func LoadKeysIncompat(r io.Reader) (k I2PKeys, err error) {
+	var buff bytes.Buffer
+	_, err = io.Copy(&buff, r)
+	if err == nil {
+		parts := strings.Split(buff.String(), "\n")
+		k = I2PKeys{I2PAddr(parts[0]), parts[1]}
+	}
+	return
+}
+
+// load keys from non-standard format by specifying a text file.
+// If the file does not exist, generate keys, otherwise, fail
+// closed.
+func LoadKeys(r string) (I2PKeys, error) {
+	exists, err := fileExists(r)
+	if err != nil {
+		return I2PKeys{}, err
+	}
+	if exists {
+		fi, err := os.Open(r)
+		if err != nil {
+			return I2PKeys{}, err
+		}
+		defer fi.Close()
+		return LoadKeysIncompat(fi)
+	}
+	return I2PKeys{}, err
+}
+
+// store keys in non standard format
+func StoreKeysIncompat(k I2PKeys, w io.Writer) (err error) {
+	_, err = io.WriteString(w, k.Address.Base64()+"\n"+k.Both)
+	return
+}
+
+func StoreKeys(k I2PKeys, r string) error {
+	fi, err := os.Open(r)
+	if err != nil {
+		return err
+	}
+	defer fi.Close()
+	return StoreKeysIncompat(k, fi)
+}
+
+func (k I2PKeys) Network() string {
+	return k.Address.Network()
+}
+
+// Returns the public keys of the I2PKeys.
+func (k I2PKeys) Addr() I2PAddr {
+	return k.Address
+}
+
+func (k I2PKeys) Public() crypto.PublicKey {
+	return k.Address
+}
+
+func (k I2PKeys) Private() []byte {
+	src := strings.Split(k.String(), k.Addr().String())[0]
+	var dest []byte
+	_, err := i2pB64enc.Decode(dest, []byte(src))
+	panic(err)
+	return dest
+}
+
+type SecretKey interface {
+	Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) (signature []byte, err error)
+}
+
+func (k I2PKeys) SecretKey() SecretKey {
+	var pk ed25519.PrivateKey = k.Private()
+	return pk
+}
+
+func (k I2PKeys) PrivateKey() crypto.PrivateKey {
+	var pk ed25519.PrivateKey = k.Private()
+	_, err := pk.Sign(rand.Reader, []byte("nonsense"), crypto.Hash(0))
+	if err != nil {
+		//TODO: Elgamal, P256, P384, P512, GOST? keys?
+	}
+	return pk
+}
+
+func (k I2PKeys) Ed25519PrivateKey() *ed25519.PrivateKey {
+	return k.SecretKey().(*ed25519.PrivateKey)
+}
+
+/*func (k I2PKeys) ElgamalPrivateKey() *ed25519.PrivateKey {
+	return k.SecretKey().(*ed25519.PrivateKey)
+}*/
+
+//func (k I2PKeys) Decrypt(rand io.Reader, msg []byte, opts crypto.DecrypterOpts) (plaintext []byte, err error) {
+//return k.SecretKey().(*ed25519.PrivateKey).Decrypt(rand, msg, opts)
+//}
+
+func (k I2PKeys) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) (signature []byte, err error) {
+	return k.SecretKey().(*ed25519.PrivateKey).Sign(rand, digest, opts)
+}
+
+// Returns the keys (both public and private), in I2Ps base64 format. Use this
+// when you create sessions.
+func (k I2PKeys) String() string {
+	return k.Both
+}
+
+func (k I2PKeys) HostnameEntry(hostname string, opts crypto.SignerOpts) (string, error) {
+	sig, err := k.Sign(rand.Reader, []byte(hostname), opts)
+	if err != nil {
+		return "", err
+	}
+	return string(sig), nil
+}
+
+// I2PAddr represents an I2P destination, almost equivalent to an IP address.
+// This is the humongously huge base64 representation of such an address, which
+// really is just a pair of public keys and also maybe a certificate. (I2P hides
+// the details of exactly what it is. Read the I2P specifications for more info.)
+type I2PAddr string
+
+// an i2p destination hash, the .b32.i2p address if you will
+type I2PDestHash [32]byte
+
+// create a desthash from a string b32.i2p address
+func DestHashFromString(str string) (dhash I2PDestHash, err error) {
+	if strings.HasSuffix(str, ".b32.i2p") && len(str) == 60 {
+		// valid
+		_, err = i2pB32enc.Decode(dhash[:], []byte(str[:52]+"===="))
+	} else {
+		// invalid
+		err = errors.New("invalid desthash format")
+	}
+	return
+}
+
+// get string representation of i2p dest hash(base32 version)
+func (h I2PDestHash) String() string {
+	b32addr := make([]byte, 56)
+	i2pB32enc.Encode(b32addr, h[:])
+	return string(b32addr[:52]) + ".b32.i2p"
+}
+
+// get base64 representation of i2p dest sha256 hash(the 44-character one)
+func (h I2PDestHash) Hash() string {
+	hash := sha256.New()
+	hash.Write(h[:])
+	digest := hash.Sum(nil)
+	buf := make([]byte, 44)
+	i2pB64enc.Encode(buf, digest)
+	return string(buf)
+}
+
+// Returns "I2P"
+func (h *I2PDestHash) Network() string {
+	return "I2P"
+}
+
+// Returns the base64 representation of the I2PAddr
+func (a I2PAddr) Base64() string {
+	return string(a)
+}
+
+// Returns the I2P destination (base32-encoded)
+func (a I2PAddr) String() string {
+	return string(a.Base32())
+}
+
+// Returns "I2P"
+func (a I2PAddr) Network() string {
+	return "I2P"
+}
+
+// Creates a new I2P address from a base64-encoded string. Checks if the address
+// addr is in correct format. (If you know for sure it is, use I2PAddr(addr).)
+func NewI2PAddrFromString(addr string) (I2PAddr, error) {
+	if strings.HasSuffix(addr, ".i2p") {
+		if strings.HasSuffix(addr, ".b32.i2p") {
+			return I2PAddr(""), errors.New("cannot convert .b32.i2p to full destination")
+		}
+		// strip off .i2p if it's there
+		addr = addr[:len(addr)-4]
+	}
+	addr = strings.Trim(addr, "\t\n\r\f ")
+	// very basic check
+	if len(addr) > 4096 || len(addr) < 516 {
+		return I2PAddr(""), errors.New("Not an I2P address")
+	}
+	buf := make([]byte, i2pB64enc.DecodedLen(len(addr)))
+	if _, err := i2pB64enc.Decode(buf, []byte(addr)); err != nil {
+		return I2PAddr(""), errors.New("Address is not base64-encoded")
+	}
+	return I2PAddr(addr), nil
+}
+
+func FiveHundredAs() I2PAddr {
+	s := ""
+	for x := 0; x < 517; x++ {
+		s += "A"
+	}
+	r, _ := NewI2PAddrFromString(s)
+	return r
+}
+
+// Creates a new I2P address from a byte array. The inverse of ToBytes().
+func NewI2PAddrFromBytes(addr []byte) (I2PAddr, error) {
+	if len(addr) > 4096 || len(addr) < 384 {
+		return I2PAddr(""), errors.New("Not an I2P address")
+	}
+	buf := make([]byte, i2pB64enc.EncodedLen(len(addr)))
+	i2pB64enc.Encode(buf, addr)
+	return I2PAddr(string(buf)), nil
+}
+
+// Turns an I2P address to a byte array. The inverse of NewI2PAddrFromBytes().
+func (addr I2PAddr) ToBytes() ([]byte, error) {
+	return i2pB64enc.DecodeString(string(addr))
+}
+
+func (addr I2PAddr) Bytes() []byte {
+	b, _ := addr.ToBytes()
+	return b
+}
+
+// Returns the *.b32.i2p address of the I2P address. It is supposed to be a
+// somewhat human-manageable 64 character long pseudo-domain name equivalent of
+// the 516+ characters long default base64-address (the I2PAddr format). It is
+// not possible to turn the base32-address back into a usable I2PAddr without
+// performing a Lookup(). Lookup only works if you are using the I2PAddr from
+// which the b32 address was generated.
+func (addr I2PAddr) Base32() (str string) {
+	return addr.DestHash().String() + addr.Port()
+}
+
+func (addr I2PAddr) Port() (str string) {
+	if FakePort {
+		return ":8080"
+	}
+	return ""
+}
+
+func (addr I2PAddr) DestHash() (h I2PDestHash) {
+	hash := sha256.New()
+	b, _ := addr.ToBytes()
+	hash.Write(b)
+	digest := hash.Sum(nil)
+	copy(h[:], digest)
+	return
+}
+
+// Makes any string into a *.b32.i2p human-readable I2P address. This makes no
+// sense, unless "anything" is an I2P destination of some sort.
+func Base32(anything string) string {
+	return I2PAddr(anything).Base32()
+}
+
+func NewDestination(samaddr string, sigType ...string) (I2PKeys, error) {
+	if samaddr == "" {
+		samaddr = "127.0.0.1:7656"
+	}
+	client, err := goSam.NewClient(samaddr)
+	if err != nil {
+		return I2PKeys{}, err
+	}
+	var sigtmp string
+	if len(sigType) > 0 {
+		sigtmp = sigType[0]
+	}
+	pub, priv, err := client.NewDestination(sigtmp)
+	if err != nil {
+		return I2PKeys{}, err
+	}
+	addr, err := NewI2PAddrFromBytes([]byte(pub))
+	if err != nil {
+		return I2PKeys{}, err
+	}
+	keys := NewKeys(addr, priv+pub)
+	if err != nil {
+		return I2PKeys{}, err
+	}
+	return keys, nil
+}

i2pkeys/I2PAddr_test.go

@@ -0,0 +1,21 @@
+package i2pkeys
+
+import (
+	"fmt"
+	"testing"
+	//	"time"
+)
+
+const yoursam = "127.0.0.1:7656"
+
+func Test_Basic(t *testing.T) {
+	fmt.Println("Test_Basic")
+	fmt.Println("\tAttaching to SAM at " + yoursam)
+	keys, err := NewDestination("")
+	if err != nil {
+		fmt.Println(err.Error())
+		t.Fail()
+		return
+	}
+	fmt.Println(keys.String())
+}

primary.go

@@ -0,0 +1,380 @@
+package sam3
+
+import (
+	"errors"
+	"fmt"
+	"math/rand"
+	"net"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
+
+const (
+	session_ADDOK = "SESSION STATUS RESULT=OK"
+)
+
+func randport() string {
+	s := rand.NewSource(time.Now().UnixNano())
+	r := rand.New(s)
+	p := r.Intn(55534) + 10000
+	return strconv.Itoa(p)
+}
+
+// Represents a primary session.
+type PrimarySession struct {
+	samAddr  string          // address to the sam bridge (ipv4:port)
+	id       string          // tunnel name
+	conn     net.Conn        // connection to sam
+	keys     i2pkeys.I2PKeys // i2p destination keys
+	Timeout  time.Duration
+	Deadline time.Time
+	sigType  string
+	Config   SAMEmit
+	stsess   *StreamSession
+	dgsess   *DatagramSession
+	//	from     string
+	//	to       string
+}
+
+func (ss *PrimarySession) From() string {
+	return "0"
+}
+
+func (ss *PrimarySession) To() string {
+	return "0"
+}
+
+func (ss *PrimarySession) SignatureType() string {
+	return ss.sigType
+}
+
+// Returns the local tunnel name of the I2P tunnel used for the stream session
+func (ss *PrimarySession) ID() string {
+	return ss.id
+}
+
+func (ss *PrimarySession) Close() error {
+	return ss.conn.Close()
+}
+
+// Returns the I2P destination (the address) of the stream session
+func (ss *PrimarySession) Addr() i2pkeys.I2PAddr {
+	//	fmt.Println("LOCAL ADDR")
+	return ss.keys.Addr()
+}
+
+func (ss *PrimarySession) LocalAddr() net.Addr {
+	//	fmt.Println("LOCAL ADDR")
+	aa := ss.keys.Addr()
+	return &aa
+}
+
+// Returns the keys associated with the stream session
+func (ss *PrimarySession) Keys() i2pkeys.I2PKeys {
+	return ss.keys
+}
+
+func (sam *PrimarySession) Dial(network, addr string) (net.Conn, error) {
+	if network == "udp" || network == "udp4" || network == "udp6" {
+		return sam.DialUDPI2P(network, network+addr[0:4], addr)
+	}
+	if network == "tcp" || network == "tcp4" || network == "tcp6" {
+		return sam.DialTCPI2P(network, network+addr[0:4], addr)
+	}
+	return nil, fmt.Errorf("Error: Must specify a valid network type")
+}
+
+// DialTCP implements x/dialer
+func (sam *PrimarySession) DialTCP(network string, laddr, raddr net.Addr) (net.Conn, error) {
+	var err error
+	if sam.stsess == nil {
+		sam.stsess, err = sam.NewUniqueStreamSubSession(network + RandString())
+		if err != nil {
+			return nil, err
+		}
+	}
+	return sam.stsess.Dial(network, raddr.String())
+}
+
+func (sam *PrimarySession) DialTCPI2P(network string, laddr, raddr string) (*SAMConn, error) {
+	var err error
+	if sam.stsess == nil {
+		sam.stsess, err = sam.NewUniqueStreamSubSession(network + RandString())
+		if err != nil {
+			return nil, err
+		}
+	}
+	c, err := sam.stsess.Dial(network, raddr)
+	if err != nil {
+		return nil, err
+	}
+	return c.(*SAMConn), nil
+}
+
+// DialUDP implements x/dialer
+func (sam *PrimarySession) DialUDP(network string, laddr, raddr net.Addr) (net.PacketConn, error) {
+	var err error
+	if sam.dgsess == nil {
+		sam.dgsess, err = sam.NewDatagramSubSession(network+raddr.String()[0:4], 0)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return sam.dgsess.Dial(network, raddr.String())
+}
+
+func (sam *PrimarySession) DialUDPI2P(network, laddr, raddr string) (*DatagramSession, error) {
+	var err error
+	if sam.dgsess == nil {
+		sam.dgsess, err = sam.NewDatagramSubSession(network+raddr[0:4], 0)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return sam.dgsess.Dial(network, raddr)
+}
+
+func (s *PrimarySession) Lookup(name string) (a net.Addr, err error) {
+	var sam *SAM
+	if len(strings.Split(name, ":")) <= 1 {
+		name += ":80"
+	}
+	sam, err = NewSAM(s.samAddr)
+	if err == nil {
+		defer sam.Close()
+		a, err = sam.Lookup(name)
+	}
+	return
+}
+
+func (sam *PrimarySession) Resolve(network, addr string) (net.Addr, error) {
+	fmt.Println("LOGGING RESOLUTION", network, addr)
+	return sam.Lookup(addr)
+}
+
+func (sam *PrimarySession) ResolveTCPAddr(network, dest string) (net.Addr, error) {
+	fmt.Println("LOGGING RESOLUTION", network, dest)
+	return sam.Lookup(dest)
+}
+
+func (sam *PrimarySession) ResolveUDPAddr(network, dest string) (net.Addr, error) {
+	fmt.Println("LOGGING RESOLUTION", network, dest)
+	return sam.Lookup(dest)
+}
+
+// Creates a new PrimarySession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *SAM) NewPrimarySession(id string, keys i2pkeys.I2PKeys, options []string) (*PrimarySession, error) {
+	conn, err := sam.newGenericSession("PRIMARY", id, keys, options, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &PrimarySession{sam.Config.I2PConfig.Sam(), id, conn, keys, time.Duration(600 * time.Second), time.Now(), Sig_NONE, sam.Config, nil, nil}, nil
+}
+
+// Creates a new PrimarySession with the I2CP- and PRIMARYinglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *SAM) NewPrimarySessionWithSignature(id string, keys i2pkeys.I2PKeys, options []string, sigType string) (*PrimarySession, error) {
+	conn, err := sam.newGenericSessionWithSignature("PRIMARY", id, keys, sigType, options, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &PrimarySession{sam.Config.I2PConfig.Sam(), id, conn, keys, time.Duration(600 * time.Second), time.Now(), sigType, sam.Config, nil, nil}, nil
+}
+
+// Creates a new session with the style of either "STREAM", "DATAGRAM" or "RAW",
+// for a new I2P tunnel with name id, using the cypher keys specified, with the
+// I2CP/streaminglib-options as specified. Extra arguments can be specified by
+// setting extra to something else than []string{}.
+// This sam3 instance is now a session
+func (sam *PrimarySession) newGenericSubSession(style, id string, extras []string) (net.Conn, error) {
+	return sam.newGenericSubSessionWithSignature(style, id, extras)
+}
+
+func (sam *PrimarySession) newGenericSubSessionWithSignature(style, id string, extras []string) (net.Conn, error) {
+	return sam.newGenericSubSessionWithSignatureAndPorts(style, id, "0", "0", extras)
+}
+
+// Creates a new session with the style of either "STREAM", "DATAGRAM" or "RAW",
+// for a new I2P tunnel with name id, using the cypher keys specified, with the
+// I2CP/streaminglib-options as specified. Extra arguments can be specified by
+// setting extra to something else than []string{}.
+// This sam3 instance is now a session
+func (sam *PrimarySession) newGenericSubSessionWithSignatureAndPorts(style, id, from, to string, extras []string) (net.Conn, error) {
+
+	conn := sam.conn
+	fp := ""
+	tp := ""
+	if from != "0" {
+		fp = " FROM_PORT=" + from
+	}
+	if to != "0" {
+		tp = " TO_PORT=" + to
+	}
+	scmsg := []byte("SESSION ADD STYLE=" + style + fp + tp + " ID=" + id + " " + strings.Join(extras, " ") + "\n")
+	for m, i := 0, 0; m != len(scmsg); i++ {
+		if i == 15 {
+			conn.Close()
+			return nil, errors.New("writing to SAM failed")
+		}
+		n, err := conn.Write(scmsg[m:])
+		if err != nil {
+			conn.Close()
+			return nil, err
+		}
+		m += n
+	}
+	buf := make([]byte, 4096)
+	n, err := conn.Read(buf)
+	if err != nil {
+		conn.Close()
+		return nil, err
+	}
+	text := string(buf[:n])
+	if strings.HasPrefix(text, session_ADDOK) {
+		//if sam.keys.String() != text[len(session_ADDOK):len(text)-1] {
+		//conn.Close()
+		//return nil, errors.New("SAMv3 created a tunnel with keys other than the ones we asked it for")
+		//}
+		return conn, nil //&StreamSession{id, conn, keys, nil, sync.RWMutex{}, nil}, nil
+	} else if text == session_DUPLICATE_ID {
+		conn.Close()
+		return nil, errors.New("Duplicate tunnel name")
+	} else if text == session_DUPLICATE_DEST {
+		conn.Close()
+		return nil, errors.New("Duplicate destination")
+	} else if text == session_INVALID_KEY {
+		conn.Close()
+		return nil, errors.New("Invalid key")
+	} else if strings.HasPrefix(text, session_I2P_ERROR) {
+		conn.Close()
+		return nil, errors.New("I2P error " + text[len(session_I2P_ERROR):])
+	} else {
+		conn.Close()
+		return nil, errors.New("Unable to parse SAMv3 reply: " + text)
+	}
+}
+
+// Creates a new StreamSession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *PrimarySession) NewStreamSubSession(id string) (*StreamSession, error) {
+	s := RandString()
+	conn, err := sam.newGenericSubSession("STREAM", id+s, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id + s, conn, sam.keys, time.Duration(600 * time.Second), time.Now(), Sig_NONE, "0", "0"}, nil
+}
+
+// Creates a new StreamSession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *PrimarySession) NewUniqueStreamSubSession(id string) (*StreamSession, error) {
+	s := RandString()
+	conn, err := sam.newGenericSubSession("STREAM", id+s, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id + s, conn, sam.keys, time.Duration(600 * time.Second), time.Now(), Sig_NONE, randport(), "0"}, nil
+}
+
+// Creates a new StreamSession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *PrimarySession) NewStreamSubSessionWithPorts(id, from, to string) (*StreamSession, error) {
+	conn, err := sam.newGenericSubSessionWithSignatureAndPorts("STREAM", id, from, to, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id, conn, sam.keys, time.Duration(600 * time.Second), time.Now(), Sig_NONE, from, to}, nil
+}
+
+/*
+func (s *PrimarySession) I2PListener(name string) (*StreamListener, error) {
+	listener, err := s.NewStreamSubSession(name)
+	if err != nil {
+		return nil, err
+	}
+	return listener.Listen()
+}
+*/
+
+// Creates a new datagram session. udpPort is the UDP port SAM is listening on,
+// and if you set it to zero, it will use SAMs standard UDP port.
+func (s *PrimarySession) NewDatagramSubSession(id string, udpPort int) (*DatagramSession, error) {
+	if udpPort > 65335 || udpPort < 0 {
+		return nil, errors.New("udpPort needs to be in the intervall 0-65335")
+	}
+	if udpPort == 0 {
+		udpPort = 7655
+	}
+	lhost, _, err := net.SplitHostPort(s.conn.LocalAddr().String())
+	if err != nil {
+		s.Close()
+		return nil, err
+	}
+	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost+":0")
+	if err != nil {
+		return nil, err
+	}
+	udpconn, err := net.ListenUDP("udp4", lUDPAddr)
+	if err != nil {
+		return nil, err
+	}
+	rhost, _, err := net.SplitHostPort(s.conn.RemoteAddr().String())
+	if err != nil {
+		s.Close()
+		return nil, err
+	}
+	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost+":"+strconv.Itoa(udpPort))
+	if err != nil {
+		return nil, err
+	}
+	_, lport, err := net.SplitHostPort(udpconn.LocalAddr().String())
+	conn, err := s.newGenericSubSession("DATAGRAM", id, []string{"PORT=" + lport})
+	if err != nil {
+		return nil, err
+	}
+	return &DatagramSession{s.Config.I2PConfig.Sam(), id, conn, udpconn, s.keys, rUDPAddr, nil}, nil
+}
+
+// Creates a new raw session. udpPort is the UDP port SAM is listening on,
+// and if you set it to zero, it will use SAMs standard UDP port.
+func (s *PrimarySession) NewRawSubSession(id string, udpPort int) (*RawSession, error) {
+	if udpPort > 65335 || udpPort < 0 {
+		return nil, errors.New("udpPort needs to be in the intervall 0-65335")
+	}
+	if udpPort == 0 {
+		udpPort = 7655
+	}
+	lhost, _, err := net.SplitHostPort(s.conn.LocalAddr().String())
+	if err != nil {
+		s.Close()
+		return nil, err
+	}
+	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost+":0")
+	if err != nil {
+		return nil, err
+	}
+	udpconn, err := net.ListenUDP("udp4", lUDPAddr)
+	if err != nil {
+		return nil, err
+	}
+	rhost, _, err := net.SplitHostPort(s.conn.RemoteAddr().String())
+	if err != nil {
+		s.Close()
+		return nil, err
+	}
+	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost+":"+strconv.Itoa(udpPort))
+	if err != nil {
+		return nil, err
+	}
+	_, lport, err := net.SplitHostPort(udpconn.LocalAddr().String())
+	//	conn, err := s.newGenericSubSession("RAW", id, s.keys, options, []string{"PORT=" + lport})
+	conn, err := s.newGenericSubSession("RAW", id, []string{"PORT=" + lport})
+	if err != nil {
+		return nil, err
+	}
+	return &RawSession{s.Config.I2PConfig.Sam(), id, conn, udpconn, s.keys, rUDPAddr}, nil
+}

primary_datagram_test.go

@@ -0,0 +1,151 @@
+// +build nettest
+
+package sam3
+
+import (
+	"fmt"
+	"log"
+	"testing"
+	"time"
+)
+
+func Test_PrimaryDatagramServerClient(t *testing.T) {
+	if testing.Short() {
+		return
+	}
+
+	fmt.Println("Test_PrimaryDatagramServerClient")
+	earlysam, err := NewSAM(yoursam)
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		t.Fail()
+		return
+	}
+
+	sam, err := earlysam.NewPrimarySession("PrimaryTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer sam.Close()
+	//	fmt.Println("\tServer: My address: " + keys.Addr().Base32())
+	fmt.Println("\tServer: Creating tunnel")
+	ds, err := sam.NewDatagramSubSession("PrimaryTunnel"+RandString(), 0)
+	if err != nil {
+		fmt.Println("Server: Failed to create tunnel: " + err.Error())
+		t.Fail()
+		return
+	}
+	defer ds.Close()
+	c, w := make(chan bool), make(chan bool)
+	go func(c, w chan (bool)) {
+		sam2, err := NewSAM(yoursam)
+		if err != nil {
+			c <- false
+			return
+		}
+		defer sam2.Close()
+		keys, err := sam2.NewKeys()
+		if err != nil {
+			c <- false
+			return
+		}
+		fmt.Println("\tClient: Creating tunnel")
+		ds2, err := sam2.NewDatagramSession("PRIMARYClientTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"}, 0)
+		if err != nil {
+			c <- false
+			return
+		}
+		defer ds2.Close()
+		//		fmt.Println("\tClient: Servers address: " + ds.LocalAddr().Base32())
+		//		fmt.Println("\tClient: Clients address: " + ds2.LocalAddr().Base32())
+		fmt.Println("\tClient: Tries to send primary to server")
+		for {
+			select {
+			default:
+				_, err = ds2.WriteTo([]byte("Hello primary-world! <3 <3 <3 <3 <3 <3"), ds.LocalAddr())
+				if err != nil {
+					fmt.Println("\tClient: Failed to send primary: " + err.Error())
+					c <- false
+					return
+				}
+				time.Sleep(5 * time.Second)
+			case <-w:
+				fmt.Println("\tClient: Sent primary, quitting.")
+				return
+			}
+		}
+		c <- true
+	}(c, w)
+	buf := make([]byte, 512)
+	fmt.Println("\tServer: ReadFrom() waiting...")
+	n, _, err := ds.ReadFrom(buf)
+	w <- true
+	if err != nil {
+		fmt.Println("\tServer: Failed to ReadFrom(): " + err.Error())
+		t.Fail()
+		return
+	}
+	fmt.Println("\tServer: Received primary: " + string(buf[:n]))
+	//	fmt.Println("\tServer: Senders address was: " + saddr.Base32())
+}
+
+func ExamplePrimaryDatagramSession() {
+	// Creates a new PrimarySession, then creates a Datagram subsession on top of it
+
+	const samBridge = "127.0.0.1:7656"
+
+	earlysam, err := NewSAM(samBridge)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	myself := keys.Addr()
+
+	sam, err := earlysam.NewPrimarySession("PrimaryTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	defer sam.Close()
+
+	// See the example Option_* variables.
+	dg, err := sam.NewDatagramSubSession("DGTUN"+RandString(), 0)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	defer dg.Close()
+	someone, err := earlysam.Lookup("zzz.i2p")
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	dg.WriteTo([]byte("Hello stranger!"), someone)
+	dg.WriteTo([]byte("Hello myself!"), myself)
+
+	buf := make([]byte, 31*1024)
+	n, _, err := dg.ReadFrom(buf)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	log.Println("Got message: '" + string(buf[:n]) + "'")
+	fmt.Println("Got message: " + string(buf[:n]))
+
+	return
+	// Output:
+	//Got message: Hello myself!
+}

primary_stream_test.go

@@ -0,0 +1,307 @@
+// +build nettest
+
+package sam3
+
+import (
+	"fmt"
+	"log"
+	"strings"
+	"testing"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
+
+func Test_PrimaryStreamingDial(t *testing.T) {
+	if testing.Short() {
+		return
+	}
+	fmt.Println("Test_PrimaryStreamingDial")
+	earlysam, err := NewSAM(yoursam)
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		t.Fail()
+		return
+	}
+
+	sam, err := earlysam.NewPrimarySession("PrimaryTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer sam.Close()
+	fmt.Println("\tBuilding tunnel")
+	ss, err := sam.NewStreamSubSession("primaryStreamTunnel")
+	if err != nil {
+		fmt.Println(err.Error())
+		t.Fail()
+		return
+	}
+	defer ss.Close()
+	fmt.Println("\tNotice: This may fail if your I2P node is not well integrated in the I2P network.")
+	fmt.Println("\tLooking up i2p-projekt.i2p")
+	forumAddr, err := earlysam.Lookup("i2p-projekt.i2p")
+	if err != nil {
+		fmt.Println(err.Error())
+		t.Fail()
+		return
+	}
+	fmt.Println("\tDialing i2p-projekt.i2p(", forumAddr.Base32(), forumAddr.DestHash().Hash(), ")")
+	conn, err := ss.DialI2P(forumAddr)
+	if err != nil {
+		fmt.Println(err.Error())
+		t.Fail()
+		return
+	}
+	defer conn.Close()
+	fmt.Println("\tSending HTTP GET /")
+	if _, err := conn.Write([]byte("GET /\n")); err != nil {
+		fmt.Println(err.Error())
+		t.Fail()
+		return
+	}
+	buf := make([]byte, 4096)
+	n, err := conn.Read(buf)
+	if !strings.Contains(strings.ToLower(string(buf[:n])), "http") && !strings.Contains(strings.ToLower(string(buf[:n])), "html") {
+		fmt.Printf("\tProbably failed to StreamSession.DialI2P(i2p-projekt.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+	} else {
+		fmt.Println("\tRead HTTP/HTML from i2p-projekt.i2p")
+	}
+}
+
+func Test_PrimaryStreamingServerClient(t *testing.T) {
+	if testing.Short() {
+		return
+	}
+
+	fmt.Println("Test_StreamingServerClient")
+	earlysam, err := NewSAM(yoursam)
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		t.Fail()
+		return
+	}
+
+	sam, err := earlysam.NewPrimarySession("PrimaryServerClientTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		t.Fail()
+		return
+	}
+	defer sam.Close()
+	fmt.Println("\tServer: Creating tunnel")
+	ss, err := sam.NewStreamSubSession("primaryExampleServerTun")
+	if err != nil {
+		return
+	}
+	defer ss.Close()
+	c, w := make(chan bool), make(chan bool)
+	go func(c, w chan (bool)) {
+		if !(<-w) {
+			return
+		}
+		/*sam2, err := NewSAM(yoursam)
+		if err != nil {
+			c <- false
+			return
+		}
+		defer sam2.Close()
+		keys, err := sam2.NewKeys()
+		if err != nil {
+			c <- false
+			return
+		}*/
+		fmt.Println("\tClient: Creating tunnel")
+		ss2, err := sam.NewStreamSubSession("primaryExampleClientTun")
+		if err != nil {
+			c <- false
+			return
+		}
+		defer ss2.Close()
+		fmt.Println("\tClient: Connecting to server")
+		conn, err := ss2.DialI2P(ss.Addr())
+		if err != nil {
+			c <- false
+			return
+		}
+		fmt.Println("\tClient: Connected to tunnel")
+		defer conn.Close()
+		_, err = conn.Write([]byte("Hello world <3 <3 <3 <3 <3 <3"))
+		if err != nil {
+			c <- false
+			return
+		}
+		c <- true
+	}(c, w)
+	l, err := ss.Listen()
+	if err != nil {
+		fmt.Println("ss.Listen(): " + err.Error())
+		t.Fail()
+		w <- false
+		return
+	}
+	defer l.Close()
+	w <- true
+	fmt.Println("\tServer: Accept()ing on tunnel")
+	conn, err := l.Accept()
+	if err != nil {
+		t.Fail()
+		fmt.Println("Failed to Accept(): " + err.Error())
+		return
+	}
+	defer conn.Close()
+	buf := make([]byte, 512)
+	n, err := conn.Read(buf)
+	fmt.Printf("\tClient exited successfully: %t\n", <-c)
+	fmt.Println("\tServer: received from Client: " + string(buf[:n]))
+}
+
+func ExamplePrimaryStreamSession() {
+	// Creates a new StreamingSession, dials to idk.i2p and gets a SAMConn
+	// which behaves just like a normal net.Conn.
+
+	const samBridge = "127.0.0.1:7656"
+
+	earlysam, err := NewSAM(yoursam)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+	sam, err := earlysam.NewPrimarySession("PrimaryServerClientTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+	defer sam.Close()
+	// See the example Option_* variables.
+	ss, err := sam.NewStreamSubSession("stream_example")
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	ss.Close()
+	someone, err := earlysam.Lookup("idk.i2p")
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	conn, err := ss.DialI2P(someone)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	defer conn.Close()
+	fmt.Println("Sending HTTP GET /")
+	if _, err := conn.Write([]byte("GET /\n")); err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	buf := make([]byte, 4096)
+	n, err := conn.Read(buf)
+	if !strings.Contains(strings.ToLower(string(buf[:n])), "http") && !strings.Contains(strings.ToLower(string(buf[:n])), "html") {
+		fmt.Printf("Probably failed to StreamSession.DialI2P(idk.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+		log.Printf("Probably failed to StreamSession.DialI2P(idk.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+	} else {
+		fmt.Println("Read HTTP/HTML from idk.i2p")
+		log.Println("Read HTTP/HTML from idk.i2p")
+	}
+	return
+
+	// Output:
+	//Sending HTTP GET /
+	//Read HTTP/HTML from idk.i2p
+}
+
+func ExamplePrimaryStreamListener() {
+	// One server Accept()ing on a StreamListener, and one client that Dials
+	// through I2P to the server. Server writes "Hello world!" through a SAMConn
+	// (which implements net.Conn) and the client prints the message.
+
+	const samBridge = "127.0.0.1:7656"
+
+	earlysam, err := NewSAM(yoursam)
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+	defer earlysam.Close()
+	keys, err := earlysam.NewKeys()
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+
+	sam, err := earlysam.NewPrimarySession("PrimaryListenerTunnel", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	if err != nil {
+		log.Fatal(err.Error())
+		return
+	}
+	defer sam.Close()
+
+	quit := make(chan bool)
+
+	// Client connecting to the server
+	go func(server i2pkeys.I2PAddr) {
+		cs, err := sam.NewStreamSubSession("client_example")
+		if err != nil {
+			fmt.Println(err.Error())
+			quit <- false
+			return
+		}
+		defer cs.Close()
+		conn, err := cs.DialI2P(server)
+		if err != nil {
+			fmt.Println(err.Error())
+			quit <- false
+			return
+		}
+		buf := make([]byte, 256)
+		n, err := conn.Read(buf)
+		if err != nil {
+			fmt.Println(err.Error())
+			quit <- false
+			return
+		}
+		fmt.Println(string(buf[:n]))
+		quit <- true
+	}(keys.Addr()) // end of client
+
+	ss, err := sam.NewStreamSubSession("server_example")
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	defer ss.Close()
+	l, err := ss.Listen()
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	conn, err := l.Accept()
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	conn.Write([]byte("Hello world!"))
+
+	<-quit // waits for client to die, for example only
+
+	// Output:
+	//Hello world!
+}

raw.go

@@ -6,6 +6,8 @@ import (
 	"net"
 	"strconv"
 	"time"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
 )
 
 // The RawSession provides no authentication of senders, and there is no sender
@@ -19,13 +21,13 @@ type RawSession struct {
 	id       string          // tunnel name
 	conn     net.Conn        // connection to sam bridge
 	udpconn  *net.UDPConn    // used to deliver datagrams
-	keys        I2PKeys            // i2p destination keys
+	keys     i2pkeys.I2PKeys // i2p destination keys
 	rUDPAddr *net.UDPAddr    // the SAM bridge UDP-port
 }
 
 // Creates a new raw session. udpPort is the UDP port SAM is listening on,
 // and if you set it to zero, it will use SAMs standard UDP port.
-func (s *SAM) NewRawSession(id string, keys I2PKeys, options []string, udpPort int) (*RawSession, error) {
+func (s *SAM) NewRawSession(id string, keys i2pkeys.I2PKeys, options []string, udpPort int) (*RawSession, error) {
 	if udpPort > 65335 || udpPort < 0 {
 		return nil, errors.New("udpPort needs to be in the intervall 0-65335")
 	}
@@ -37,7 +39,7 @@ func (s *SAM) NewRawSession(id string, keys I2PKeys, options []string, udpPort i
 		s.Close()
 		return nil, err
 	}
-	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost + ":0")
+	lUDPAddr, err := net.ResolveUDPAddr("udp4", lhost+":0")
 	if err != nil {
 		return nil, err
 	}
@@ -50,7 +52,7 @@ func (s *SAM) NewRawSession(id string, keys I2PKeys, options []string, udpPort i
 		s.Close()
 		return nil, err
 	}
-	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost + ":" + strconv.Itoa(udpPort))
+	rUDPAddr, err := net.ResolveUDPAddr("udp4", rhost+":"+strconv.Itoa(udpPort))
 	if err != nil {
 		return nil, err
 	}
@@ -59,7 +61,7 @@ func (s *SAM) NewRawSession(id string, keys I2PKeys, options []string, udpPort i
 	if err != nil {
 		return nil, err
 	}
-	return &RawSession{s.address, id, conn, udpconn, keys, rUDPAddr}, nil
+	return &RawSession{s.Config.I2PConfig.Sam(), id, conn, udpconn, keys, rUDPAddr}, nil
 }
 
 // Reads one raw datagram sent to the destination of the DatagramSession. Returns
@@ -83,7 +85,7 @@ func (s *RawSession) Read(b []byte) (n int, err error) {
 
 // Sends one raw datagram to the destination specified. At the time of writing,
 // maximum size is 32 kilobyte, but this may change in the future.
-func (s *RawSession) WriteTo(b []byte, addr I2PAddr) (n int, err error) {
+func (s *RawSession) WriteTo(b []byte, addr i2pkeys.I2PAddr) (n int, err error) {
 	header := []byte("3.0 " + s.id + " " + addr.String() + "\n")
 	msg := append(header, b...)
 	n, err = s.udpconn.WriteToUDP(msg, s.rUDPAddr)
@@ -101,7 +103,7 @@ func (s *RawSession) Close() error {
 }
 
 // Returns the local I2P destination of the RawSession.
-func (s *RawSession) LocalAddr() I2PAddr {
+func (s *RawSession) LocalAddr() i2pkeys.I2PAddr {
 	return s.keys.Addr()
 }
 
@@ -116,5 +118,3 @@ func (s *RawSession) SetReadDeadline(t time.Time) error {
 func (s *RawSession) SetWriteDeadline(t time.Time) error {
 	return s.udpconn.SetWriteDeadline(t)
 }
-
-

resolver.go

@@ -0,0 +1,72 @@
+package sam3
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"strings"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
+
+type SAMResolver struct {
+	*SAM
+}
+
+func NewSAMResolver(parent *SAM) (*SAMResolver, error) {
+	var s SAMResolver
+	s.SAM = parent
+	return &s, nil
+}
+
+func NewFullSAMResolver(address string) (*SAMResolver, error) {
+	var s SAMResolver
+	var err error
+	s.SAM, err = NewSAM(address)
+	if err != nil {
+		return nil, err
+	}
+	return &s, nil
+}
+
+// Performs a lookup, probably this order: 1) routers known addresses, cached
+// addresses, 3) by asking peers in the I2P network.
+func (sam *SAMResolver) Resolve(name string) (i2pkeys.I2PAddr, error) {
+	if _, err := sam.conn.Write([]byte("NAMING LOOKUP NAME=" + name + "\r\n")); err != nil {
+		sam.Close()
+		return i2pkeys.I2PAddr(""), err
+	}
+	buf := make([]byte, 4096)
+	n, err := sam.conn.Read(buf)
+	if err != nil {
+		sam.Close()
+		return i2pkeys.I2PAddr(""), err
+	}
+	if n <= 13 || !strings.HasPrefix(string(buf[:n]), "NAMING REPLY ") {
+		return i2pkeys.I2PAddr(""), errors.New("Failed to parse.")
+	}
+	s := bufio.NewScanner(bytes.NewReader(buf[13:n]))
+	s.Split(bufio.ScanWords)
+
+	errStr := ""
+	for s.Scan() {
+		text := s.Text()
+		//log.Println("SAM3", text)
+		if text == "RESULT=OK" {
+			continue
+		} else if text == "RESULT=INVALID_KEY" {
+			errStr += "Invalid key."
+		} else if text == "RESULT=KEY_NOT_FOUND" {
+			errStr += "Unable to resolve " + name
+		} else if text == "NAME="+name {
+			continue
+		} else if strings.HasPrefix(text, "VALUE=") {
+			return i2pkeys.I2PAddr(text[6:]), nil
+		} else if strings.HasPrefix(text, "MESSAGE=") {
+			errStr += " " + text[8:]
+		} else {
+			continue
+		}
+	}
+	return i2pkeys.I2PAddr(""), errors.New(errStr)
+}

sam3.go

@@ -4,17 +4,28 @@ package sam3
 import (
 	"bufio"
 	"bytes"
-	"net"
 	"errors"
+	"io"
+	"math/rand"
+	"net"
+	"os"
 	"strings"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
 )
 
-
+import (
+	. "github.com/eyedeekay/sam3/i2pkeys"
+)
 
 // Used for controlling I2Ps SAMv3.
 type SAM struct {
-	address     string        // ipv4:port
+	address  string
 	conn     net.Conn
+	resolver *SAMResolver
+	Config   SAMEmit
+	keys     *i2pkeys.I2PKeys
+	sigType  int
 }
 
 const (
@@ -25,40 +36,133 @@ const (
 	session_I2P_ERROR      = "SESSION STATUS RESULT=I2P_ERROR MESSAGE="
 )
 
+const (
+	Sig_NONE                 = ""
+	Sig_DSA_SHA1             = "SIGNATURE_TYPE=DSA_SHA1"
+	Sig_ECDSA_SHA256_P256    = "SIGNATURE_TYPE=ECDSA_SHA256_P256"
+	Sig_ECDSA_SHA384_P384    = "SIGNATURE_TYPE=ECDSA_SHA384_P384"
+	Sig_ECDSA_SHA512_P521    = "SIGNATURE_TYPE=ECDSA_SHA512_P521"
+	Sig_EdDSA_SHA512_Ed25519 = "SIGNATURE_TYPE=EdDSA_SHA512_Ed25519"
+)
+
+var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+
+func RandString() string {
+	n := 4
+	b := make([]rune, n)
+	for i := range b {
+		b[i] = letters[rand.Intn(len(letters))]
+	}
+	return string(b)
+}
+
 // Creates a new controller for the I2P routers SAM bridge.
 func NewSAM(address string) (*SAM, error) {
-	conn, err := net.Dial("tcp4", address)
+	var s SAM
+	// TODO: clean this up
+	conn, err := net.Dial("tcp", address)
 	if err != nil {
 		return nil, err
 	}
-	if _, err := conn.Write([]byte("HELLO VERSION MIN=3.0 MAX=3.0\n")); err != nil {
+	if _, err := conn.Write(s.Config.HelloBytes()); err != nil {
+		conn.Close()
 		return nil, err
 	}
 	buf := make([]byte, 256)
 	n, err := conn.Read(buf)
 	if err != nil {
+		conn.Close()
 		return nil, err
 	}
-	if string(buf[:n]) == "HELLO REPLY RESULT=OK VERSION=3.0\n" {
-		return &SAM{address, conn}, nil
+	if strings.Contains(string(buf[:n]), "HELLO REPLY RESULT=OK") {
+		s.Config.I2PConfig.SetSAMAddress(address)
+		s.conn = conn
+		//s.Config.I2PConfig.DestinationKeys = nil
+		s.resolver, err = NewSAMResolver(&s)
+		if err != nil {
+			return nil, err
+		}
+		return &s, nil
+		//return &SAM{address, conn, nil, nil}, nil
 	} else if string(buf[:n]) == "HELLO REPLY RESULT=NOVERSION\n" {
+		conn.Close()
 		return nil, errors.New("That SAM bridge does not support SAMv3.")
 	} else {
+		conn.Close()
 		return nil, errors.New(string(buf[:n]))
 	}
 }
 
+func (sam *SAM) Keys() (k *i2pkeys.I2PKeys) {
+	//TODO: copy them?
+	k = &sam.Config.I2PConfig.DestinationKeys
+	return
+}
+
+// read public/private keys from an io.Reader
+func (sam *SAM) ReadKeys(r io.Reader) (err error) {
+	var keys i2pkeys.I2PKeys
+	keys, err = i2pkeys.LoadKeysIncompat(r)
+	if err == nil {
+		sam.Config.I2PConfig.DestinationKeys = keys
+	}
+	return
+}
+
+// if keyfile fname does not exist
+func (sam *SAM) EnsureKeyfile(fname string) (keys i2pkeys.I2PKeys, err error) {
+	if fname == "" {
+		// transient
+		keys, err = sam.NewKeys()
+		if err == nil {
+			sam.Config.I2PConfig.DestinationKeys = keys
+		}
+	} else {
+		// persistant
+		_, err = os.Stat(fname)
+		if os.IsNotExist(err) {
+			// make the keys
+			keys, err = sam.NewKeys()
+			if err == nil {
+				sam.Config.I2PConfig.DestinationKeys = keys
+				// save keys
+				var f io.WriteCloser
+				f, err = os.OpenFile(fname, os.O_WRONLY|os.O_CREATE, 0600)
+				if err == nil {
+					err = i2pkeys.StoreKeysIncompat(keys, f)
+					f.Close()
+				}
+			}
+		} else if err == nil {
+			// we haz key file
+			var f *os.File
+			f, err = os.Open(fname)
+			if err == nil {
+				keys, err = i2pkeys.LoadKeysIncompat(f)
+				if err == nil {
+					sam.Config.I2PConfig.DestinationKeys = keys
+				}
+			}
+		}
+	}
+	return
+}
+
 // Creates the I2P-equivalent of an IP address, that is unique and only the one
 // who has the private keys can send messages from. The public keys are the I2P
 // desination (the address) that anyone can send messages to.
-func (sam *SAM) NewKeys() (I2PKeys, error) {
-	if _, err := sam.conn.Write([]byte("DEST GENERATE\n")); err != nil {
-		return I2PKeys{}, err
+func (sam *SAM) NewKeys(sigType ...string) (i2pkeys.I2PKeys, error) {
+	sigtmp := ""
+	if len(sigType) > 0 {
+		sigtmp = sigType[0]
+	}
+	if _, err := sam.conn.Write([]byte("DEST GENERATE " + sigtmp + "\n")); err != nil {
+		return i2pkeys.I2PKeys{}, err
 	}
 	buf := make([]byte, 8192)
 	n, err := sam.conn.Read(buf)
 	if err != nil {
-		return I2PKeys{}, err
+		return i2pkeys.I2PKeys{}, err
 	}
 	s := bufio.NewScanner(bytes.NewReader(buf[:n]))
 	s.Split(bufio.ScanWords)
@@ -75,49 +179,16 @@ func (sam *SAM) NewKeys() (I2PKeys, error) {
 		} else if strings.HasPrefix(text, "PRIV=") {
 			priv = text[5:]
 		} else {
-			return I2PKeys{}, errors.New("Failed to parse keys.")
+			return i2pkeys.I2PKeys{}, errors.New("Failed to parse keys.")
 		}
 	}
-	return I2PKeys{I2PAddr(pub), priv}, nil
+	return NewKeys(I2PAddr(pub), priv), nil
 }
 
 // Performs a lookup, probably this order: 1) routers known addresses, cached
 // addresses, 3) by asking peers in the I2P network.
-func (sam *SAM) Lookup(name string) (I2PAddr, error) {
-	if _, err := sam.conn.Write([]byte("NAMING LOOKUP NAME=" + name + "\n")); err != nil {
-		return I2PAddr(""), err
-	}
-	buf := make([]byte, 4096)
-	n, err := sam.conn.Read(buf)
-	if err != nil {
-		return I2PAddr(""), err
-	}
-	if n <= 13 || !strings.HasPrefix(string(buf[:n]), "NAMING REPLY ") {
-		return I2PAddr(""), errors.New("Failed to parse.")
-	}
-	s := bufio.NewScanner(bytes.NewReader(buf[13:n]))
-	s.Split(bufio.ScanWords)
-
-	errStr := ""
-	for s.Scan() {
-		text := s.Text()
-		if text == "RESULT=OK" {
-			continue
-		} else if text == "RESULT=INVALID_KEY" {
-			errStr += "Invalid key."
-		} else if text == "RESULT=KEY_NOT_FOUND" {
-			errStr += "Unable to resolve " + name
-		} else if text == "NAME=" + name {
-			continue
-		} else if strings.HasPrefix(text, "VALUE=") {
-			return I2PAddr(text[6:]), nil
-		} else if strings.HasPrefix(text, "MESSAGE=") {
-			errStr += " " + text[8:]
-		} else {
-      continue
-		}
-	}
-	return I2PAddr(""), errors.New(errStr)
+func (sam *SAM) Lookup(name string) (i2pkeys.I2PAddr, error) {
+	return sam.resolver.Resolve(name)
 }
 
 // Creates a new session with the style of either "STREAM", "DATAGRAM" or "RAW",
@@ -125,16 +196,37 @@ func (sam *SAM) Lookup(name string) (I2PAddr, error) {
 // I2CP/streaminglib-options as specified. Extra arguments can be specified by
 // setting extra to something else than []string{}.
 // This sam3 instance is now a session
-func (sam *SAM) newGenericSession(style, id string, keys I2PKeys, options []string, extras []string) (net.Conn, error) {
+func (sam *SAM) newGenericSession(style, id string, keys i2pkeys.I2PKeys, options []string, extras []string) (net.Conn, error) {
+	return sam.newGenericSessionWithSignature(style, id, keys, Sig_NONE, options, extras)
+}
+
+func (sam *SAM) newGenericSessionWithSignature(style, id string, keys i2pkeys.I2PKeys, sigType string, options []string, extras []string) (net.Conn, error) {
+	return sam.newGenericSessionWithSignatureAndPorts(style, id, "0", "0", keys, sigType, options, extras)
+}
+
+// Creates a new session with the style of either "STREAM", "DATAGRAM" or "RAW",
+// for a new I2P tunnel with name id, using the cypher keys specified, with the
+// I2CP/streaminglib-options as specified. Extra arguments can be specified by
+// setting extra to something else than []string{}.
+// This sam3 instance is now a session
+func (sam *SAM) newGenericSessionWithSignatureAndPorts(style, id, from, to string, keys i2pkeys.I2PKeys, sigType string, options []string, extras []string) (net.Conn, error) {
 
 	optStr := ""
 	for _, opt := range options {
-		optStr += "OPTION=" + opt + " "
+		optStr += opt + " "
 	}
 
 	conn := sam.conn
-	scmsg := []byte("SESSION CREATE STYLE=" + style + " ID=" + id + " DESTINATION=" + keys.String() + " " + optStr + strings.Join(extras, " ") + "\n")
-	for m, i:=0, 0; m!=len(scmsg); i++ {
+	fp := ""
+	tp := ""
+	if from != "0" {
+		fp = " FROM_PORT=" + from
+	}
+	if to != "0" {
+		tp = " TO_PORT=" + to
+	}
+	scmsg := []byte("SESSION CREATE STYLE=" + style + fp + tp + " ID=" + id + " DESTINATION=" + keys.String() + " " + optStr + strings.Join(extras, " ") + "\n")
+	for m, i := 0, 0; m != len(scmsg); i++ {
 		if i == 15 {
 			conn.Close()
 			return nil, errors.New("writing to SAM failed")
@@ -155,6 +247,7 @@ func (sam *SAM) newGenericSession(style, id string, keys I2PKeys, options []stri
 	text := string(buf[:n])
 	if strings.HasPrefix(text, session_OK) {
 		if keys.String() != text[len(session_OK):len(text)-1] {
+			conn.Close()
 			return nil, errors.New("SAMv3 created a tunnel with keys other than the ones we asked it for")
 		}
 		return conn, nil //&StreamSession{id, conn, keys, nil, sync.RWMutex{}, nil}, nil
@@ -178,12 +271,5 @@ func (sam *SAM) newGenericSession(style, id string, keys I2PKeys, options []stri
 
 // close this sam session
 func (sam *SAM) Close() error {
-	if err := sam.conn.Close(); err != nil {
-		return err
-	}
-	return nil
+	return sam.conn.Close()
 }
-
-
-
-

sam3_test.go

@@ -1,25 +1,21 @@
+// +build nettest
+
 package sam3
 
-
-
 import (
 	"fmt"
 	"testing"
 	"time"
 )
 
-
-
 const yoursam = "127.0.0.1:7656"
 
-
-
 func Test_Basic(t *testing.T) {
 	fmt.Println("Test_Basic")
 	fmt.Println("\tAttaching to SAM at " + yoursam)
 	sam, err := NewSAM(yoursam)
 	if err != nil {
-		fmt.Println(err.Error)
+		fmt.Println(err.Error())
 		t.Fail()
 		return
 	}
@@ -31,7 +27,7 @@ func Test_Basic(t *testing.T) {
 		t.Fail()
 	} else {
 		fmt.Println("\tAddress created: " + keys.Addr().Base32())
-		fmt.Println("\tI2PKeys: " + string(keys.both)[:50] + "(...etc)")
+		fmt.Println("\tI2PKeys: " + string(keys.String())[:50] + "(...etc)")
 	}
 
 	addr2, err := sam.Lookup("zzz.i2p")
@@ -48,7 +44,6 @@ func Test_Basic(t *testing.T) {
 	}
 }
 
-
 /*
 func Test_GenericSession(t *testing.T) {
 	if testing.Short() {
@@ -95,13 +90,6 @@ func Test_GenericSession(t *testing.T) {
 }
 */
 
-
-
-
-
-
-
-
 func Test_RawServerClient(t *testing.T) {
 	if testing.Short() {
 		return
@@ -127,7 +115,7 @@ func Test_RawServerClient(t *testing.T) {
 		return
 	}
 	c, w := make(chan bool), make(chan bool)
-	go func(c, w chan(bool)) { 
+	go func(c, w chan (bool)) {
 		sam2, err := NewSAM(yoursam)
 		if err != nil {
 			c <- false
@@ -149,7 +137,7 @@ func Test_RawServerClient(t *testing.T) {
 		fmt.Println("\tClient: Tries to send raw datagram to server")
 		for {
 			select {
-				default :
+			default:
 				_, err = rs2.WriteTo([]byte("Hello raw-world! <3 <3 <3 <3 <3 <3"), rs.LocalAddr())
 				if err != nil {
 					fmt.Println("\tClient: Failed to send raw datagram: " + err.Error())
@@ -157,7 +145,7 @@ func Test_RawServerClient(t *testing.T) {
 					return
 				}
 				time.Sleep(5 * time.Second)
-				case <-w :
+			case <-w:
 				fmt.Println("\tClient: Sent raw datagram, quitting.")
 				return
 			}
@@ -174,7 +162,5 @@ func Test_RawServerClient(t *testing.T) {
 		return
 	}
 	fmt.Println("\tServer: Received datagram: " + string(buf[:n]))
-//	fmt.Println("\tServer: Senders address was: " + saddr.Base32())
+	//	fmt.Println("\tServer: Senders address was: " + saddr.Base32())
 }
-
-

stream.go

@@ -3,198 +3,342 @@ package sam3
 import (
 	"bufio"
 	"bytes"
+	"context"
 	"errors"
+	"io"
+	"log"
 	"net"
 	"strconv"
 	"strings"
+	"time"
+
+	"github.com/eyedeekay/sam3/i2pkeys"
 )
 
 // Represents a streaming session.
 type StreamSession struct {
 	samAddr  string          // address to the sam bridge (ipv4:port)
 	id       string          // tunnel name
-	conn        net.Conn           // connection to sam bridge
-	keys        I2PKeys            // i2p destination keys
+	conn     net.Conn        // connection to sam
+	keys     i2pkeys.I2PKeys // i2p destination keys
+	Timeout  time.Duration
+	Deadline time.Time
+	sigType  string
+	from     string
+	to       string
+}
+
+func (ss *StreamSession) From() string {
+	return ss.from
+}
+
+func (ss *StreamSession) To() string {
+	return ss.to
+}
+
+func (ss *StreamSession) SignatureType() string {
+	return ss.sigType
 }
 
 // Returns the local tunnel name of the I2P tunnel used for the stream session
-func (ss StreamSession) ID() string {
+func (ss *StreamSession) ID() string {
 	return ss.id
 }
 
+func (ss *StreamSession) Close() error {
+	return ss.conn.Close()
+}
+
 // Returns the I2P destination (the address) of the stream session
-func (ss StreamSession) Addr() I2PAddr {
+func (ss *StreamSession) Addr() i2pkeys.I2PAddr {
 	return ss.keys.Addr()
 }
 
 // Returns the keys associated with the stream session
-func (ss StreamSession) Keys() I2PKeys {
+func (ss *StreamSession) Keys() i2pkeys.I2PKeys {
 	return ss.keys
 }
 
 // Creates a new StreamSession with the I2CP- and streaminglib options as
 // specified. See the I2P documentation for a full list of options.
-func (sam *SAM) NewStreamSession(id string, keys I2PKeys, options []string) (*StreamSession, error) {
+func (sam *SAM) NewStreamSession(id string, keys i2pkeys.I2PKeys, options []string) (*StreamSession, error) {
 	conn, err := sam.newGenericSession("STREAM", id, keys, options, []string{})
 	if err != nil {
 		return nil, err
 	}
-	return &StreamSession{sam.address, id, conn, keys}, nil
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id, conn, keys, time.Duration(600 * time.Second), time.Now(), Sig_NONE, "0", "0"}, nil
+}
+
+// Creates a new StreamSession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *SAM) NewStreamSessionWithSignature(id string, keys i2pkeys.I2PKeys, options []string, sigType string) (*StreamSession, error) {
+	conn, err := sam.newGenericSessionWithSignature("STREAM", id, keys, sigType, options, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id, conn, keys, time.Duration(600 * time.Second), time.Now(), sigType, "0", "0"}, nil
+}
+
+// Creates a new StreamSession with the I2CP- and streaminglib options as
+// specified. See the I2P documentation for a full list of options.
+func (sam *SAM) NewStreamSessionWithSignatureAndPorts(id, from, to string, keys i2pkeys.I2PKeys, options []string, sigType string) (*StreamSession, error) {
+	conn, err := sam.newGenericSessionWithSignatureAndPorts("STREAM", id, from, to, keys, sigType, options, []string{})
+	if err != nil {
+		return nil, err
+	}
+	return &StreamSession{sam.Config.I2PConfig.Sam(), id, conn, keys, time.Duration(600 * time.Second), time.Now(), sigType, from, to}, nil
+}
+
+// lookup name, convienence function
+func (s *StreamSession) Lookup(name string) (i2pkeys.I2PAddr, error) {
+	sam, err := NewSAM(s.samAddr)
+	if err == nil {
+		addr, err := sam.Lookup(name)
+		sam.Close()
+		return addr, err
+	}
+	return i2pkeys.I2PAddr(""), err
+}
+
+// context-aware dialer, eventually...
+func (s *StreamSession) DialContext(ctx context.Context, n, addr string) (net.Conn, error) {
+	return s.DialContextI2P(ctx, n, addr)
+}
+
+// context-aware dialer, eventually...
+func (s *StreamSession) DialContextI2P(ctx context.Context, n, addr string) (*SAMConn, error) {
+	if ctx == nil {
+		panic("nil context")
+	}
+	deadline := s.deadline(ctx, time.Now())
+	if !deadline.IsZero() {
+		if d, ok := ctx.Deadline(); !ok || deadline.Before(d) {
+			subCtx, cancel := context.WithDeadline(ctx, deadline)
+			defer cancel()
+			ctx = subCtx
+		}
+	}
+
+	i2paddr, err := i2pkeys.NewI2PAddrFromString(addr)
+	if err != nil {
+		return nil, err
+	}
+	return s.DialI2P(i2paddr)
+}
+
+/*
+func (s *StreamSession) Cancel() chan *StreamSession {
+	ch := make(chan *StreamSession)
+	ch <- s
+	return ch
+}*/
+
+func minNonzeroTime(a, b time.Time) time.Time {
+	if a.IsZero() {
+		return b
+	}
+	if b.IsZero() || a.Before(b) {
+		return a
+	}
+	return b
+}
+
+// deadline returns the earliest of:
+//   - now+Timeout
+//   - d.Deadline
+//   - the context's deadline
+// Or zero, if none of Timeout, Deadline, or context's deadline is set.
+func (s *StreamSession) deadline(ctx context.Context, now time.Time) (earliest time.Time) {
+	if s.Timeout != 0 { // including negative, for historical reasons
+		earliest = now.Add(s.Timeout)
+	}
+	if d, ok := ctx.Deadline(); ok {
+		earliest = minNonzeroTime(earliest, d)
+	}
+	return minNonzeroTime(earliest, s.Deadline)
+}
+
+// implement net.Dialer
+func (s *StreamSession) Dial(n, addr string) (c net.Conn, err error) {
+
+	var i2paddr i2pkeys.I2PAddr
+	var host string
+	host, _, err = net.SplitHostPort(addr)
+	if err == nil {
+		// check for name
+		if strings.HasSuffix(host, ".b32.i2p") || strings.HasSuffix(host, ".i2p") {
+			// name lookup
+			i2paddr, err = s.Lookup(host)
+		} else {
+			// probably a destination
+			i2paddr = i2pkeys.I2PAddr(host)
+		}
+		if err == nil {
+			return s.DialI2P(i2paddr)
+		}
+	}
+	return
 }
 
 // Dials to an I2P destination and returns a SAMConn, which implements a net.Conn.
-func (s *StreamSession) DialI2P(addr I2PAddr) (*SAMConn, error) {
+func (s *StreamSession) DialI2P(addr i2pkeys.I2PAddr) (*SAMConn, error) {
 	sam, err := NewSAM(s.samAddr)
 	if err != nil {
 		return nil, err
 	}
 	conn := sam.conn
-	_,err = conn.Write([]byte("STREAM CONNECT ID=" + s.id + " DESTINATION=" + addr.Base64() + " SILENT=false\n"))
+	_, err = conn.Write([]byte("STREAM CONNECT ID=" + s.id + " FROM_PORT=" + s.from + " TO_PORT=" + s.to + " DESTINATION=" + addr.Base64() + " SILENT=false\n"))
 	if err != nil {
+		conn.Close()
 		return nil, err
 	}
 	buf := make([]byte, 4096)
 	n, err := conn.Read(buf)
-	if err != nil {
+	if err != nil && err != io.EOF {
+		conn.Close()
 		return nil, err
 	}
 	scanner := bufio.NewScanner(bytes.NewReader(buf[:n]))
 	scanner.Split(bufio.ScanWords)
 	for scanner.Scan() {
 		switch scanner.Text() {
-		case "STREAM" :
+		case "STREAM":
 			continue
-		case "STATUS" :
+		case "STATUS":
 			continue
-		case "RESULT=OK" :
-			return &SAMConn{s.keys.addr, addr, conn}, nil
-		case "RESULT=CANT_REACH_PEER" :
+		case "RESULT=OK":
+			return &SAMConn{s.keys.Addr(), addr, conn}, nil
+		case "RESULT=CANT_REACH_PEER":
+			conn.Close()
 			return nil, errors.New("Can not reach peer")
-		case "RESULT=I2P_ERROR" :
+		case "RESULT=I2P_ERROR":
+			conn.Close()
 			return nil, errors.New("I2P internal error")
-		case "RESULT=INVALID_KEY" :
+		case "RESULT=INVALID_KEY":
+			conn.Close()
 			return nil, errors.New("Invalid key")
-		case "RESULT=INVALID_ID" :
+		case "RESULT=INVALID_ID":
+			conn.Close()
 			return nil, errors.New("Invalid tunnel ID")
-		case "RESULT=TIMEOUT" :
+		case "RESULT=TIMEOUT":
+			conn.Close()
 			return nil, errors.New("Timeout")
-		default :
+		default:
+			conn.Close()
 			return nil, errors.New("Unknown error: " + scanner.Text() + " : " + string(buf[:n]))
 		}
 	}
 	panic("sam3 go library error in StreamSession.DialI2P()")
 }
 
-// Returns a listener for the I2P destination (I2PAddr) associated with the
-// StreamSession.
+// create a new stream listener to accept inbound connections
 func (s *StreamSession) Listen() (*StreamListener, error) {
-	sam, err := NewSAM(s.conn.RemoteAddr().String())
-	if err != nil {
-		return nil, err
-	}
-	lhost, _, err := net.SplitHostPort(s.conn.LocalAddr().String())
-	if err != nil {
-		sam.Close()
-		return nil, err
-	}
-	listener, err := net.Listen("tcp4", lhost + ":0")
-	_, lport, err := net.SplitHostPort(listener.Addr().String())
-	if err != nil {
-		sam.Close()
-		return nil, err
-	}
-	conn := sam.conn
-	_, err = conn.Write([]byte("STREAM FORWARD ID=" + s.id + " PORT=" + lport + " SILENT=false\n"))
-	if err != nil {
-		conn.Close()
-		return nil, err
-	}
-	buf := make([]byte, 512)
-	n, err := conn.Read(buf)
-	if err != nil {
-		conn.Close()
-		return nil, err
-	}
-	scanner := bufio.NewScanner(bytes.NewReader(buf[:n]))
-	scanner.Split(bufio.ScanWords)
-	for scanner.Scan() {
-		switch strings.TrimSpace(scanner.Text()) {
-		case "STREAM" :
-			continue
-		case "STATUS" :
-			continue
-		case "RESULT=OK" :
-			port,_ := strconv.Atoi(lport)
-			return &StreamListener{conn, listener, port, s.keys.Addr()}, nil
-		case "RESULT=I2P_ERROR" :
-			conn.Close()
-			return nil, errors.New("I2P internal error")
-		case "RESULT=INVALID_ID" :
-			conn.Close()
-			return nil, errors.New("Invalid tunnel ID")
-		default :
-			conn.Close()
-			return nil, errors.New("Unknown error: " + scanner.Text() + " : " + string(buf[:n]))
-		}
-	}
-	panic("sam3 go library error in StreamSession.Listener()")
+	return &StreamListener{
+		session: s,
+		id:      s.id,
+		laddr:   s.keys.Addr(),
+	}, nil
 }
 
-// Implements net.Listener for I2P streaming sessions
 type StreamListener struct {
-	conn        net.Conn
-	listener    net.Listener
-	lport       int
-	laddr       I2PAddr
+	// parent stream session
+	session *StreamSession
+	// our session id
+	id string
+	// our local address for this sam socket
+	laddr i2pkeys.I2PAddr
 }
 
-const defaultListenReadLen = 516
-
-// Accepts incomming connections to your StreamSession tunnel. Implements net.Listener
-func (l *StreamListener) Accept() (*SAMConn, error) {
-	conn, err := l.listener.Accept()
-	if err != nil {
-		return nil, err
-	}
-	buf := make([]byte, defaultListenReadLen)
-	n, err := conn.Read(buf)
-	if n < defaultListenReadLen {
-		return nil, errors.New("Unknown destination type: " + string(buf[:n]))
-	}
-	// I2P inserts the I2P address ("destination") of the connecting peer into the datastream, followed by
-	// a \n. Since the length of a destination may vary, this reads until a newline is found. At the time
-	// of writing, the length is never less then, and almost always equals 516 bytes, which is why 
-	// defaultListenReadLen is 516.
-	if rune(buf[defaultListenReadLen - 1]) != '\n' {
-		abuf := make([]byte, 1)
-		for {
-			n, err := conn.Read(abuf)
-			if n != 1 || err != nil {
-				return nil, errors.New("Failed to decode connecting peers I2P destination.")
-			}
-			buf = append(buf, abuf[0])
-			if rune(abuf[0]) == '\n' { break }
-		}
-	}
-	rAddr, err := NewI2PAddrFromString(string(buf[:len(buf)-1])) // the address minus the trailing newline
-	if err != nil {
-		conn.Close()
-		return nil, errors.New("Could not determine connecting tunnels address.")
-	}
-	return &SAMConn{l.laddr, rAddr, conn}, nil
+func (l *StreamListener) From() string {
+	return l.session.from
 }
 
-// Closes the stream session. Implements net.Listener
-func (l *StreamListener) Close() error {
-	err := l.listener.Close()
-	err2 := l.conn.Close()
-	if err2 != nil {
-		return err2
-	}
-	return err
+func (l *StreamListener) To() string {
+	return l.session.to
 }
 
-// Returns the I2P destination (address) of the stream session. Implements net.Listener
+// get our address
+// implements net.Listener
 func (l *StreamListener) Addr() net.Addr {
 	return l.laddr
 }
+
+// implements net.Listener
+func (l *StreamListener) Close() error {
+	return l.session.Close()
+}
+
+// implements net.Listener
+func (l *StreamListener) Accept() (net.Conn, error) {
+	return l.AcceptI2P()
+}
+
+func ExtractPairString(input, value string) string {
+	parts := strings.Split(input, " ")
+	for _, part := range parts {
+		if strings.HasPrefix(part, value) {
+			kv := strings.SplitN(input, "=", 2)
+			if len(kv) == 2 {
+				return kv[1]
+			}
+		}
+	}
+	return ""
+}
+
+func ExtractPairInt(input, value string) int {
+	rv, err := strconv.Atoi(ExtractPairString(input, value))
+	if err != nil {
+		return 0
+	}
+	return rv
+}
+
+func ExtractDest(input string) string {
+	return strings.Split(input, " ")[0]
+}
+
+// accept a new inbound connection
+func (l *StreamListener) AcceptI2P() (*SAMConn, error) {
+	s, err := NewSAM(l.session.samAddr)
+	if err == nil {
+		// we connected to sam
+		// send accept() command
+		_, err = io.WriteString(s.conn, "STREAM ACCEPT ID="+l.id+" SILENT=false\n")
+		// read reply
+		rd := bufio.NewReader(s.conn)
+		// read first line
+		line, err := rd.ReadString(10)
+		log.Println(line)
+		if err == nil {
+			if strings.HasPrefix(line, "STREAM STATUS RESULT=OK") {
+				// we gud read destination line
+				destline, err := rd.ReadString(10)
+				log.Println(destline)
+				if err == nil {
+					dest := ExtractDest(destline)
+					l.session.from = ExtractPairString(destline, "FROM_PORT")
+					l.session.to = ExtractPairString(destline, "TO_PORT")
+					// return wrapped connection
+					dest = strings.Trim(dest, "\n")
+					return &SAMConn{
+						laddr: l.laddr,
+						raddr: i2pkeys.I2PAddr(dest),
+						conn:  s.conn,
+					}, nil
+				} else {
+					s.Close()
+					return nil, err
+				}
+			} else {
+				s.Close()
+				return nil, errors.New("invalid sam line: " + line)
+			}
+		} else {
+			s.Close()
+			return nil, err
+		}
+	}
+	s.Close()
+	return nil, err
+}

stream_test.go

@@ -1,11 +1,15 @@
+// +build nettest
+
 package sam3
 
 import (
 	"fmt"
+	"log"
 	"strings"
 	"testing"
-)
 
+	"github.com/eyedeekay/sam3/i2pkeys"
+)
 
 func Test_StreamingDial(t *testing.T) {
 	if testing.Short() {
@@ -14,7 +18,7 @@ func Test_StreamingDial(t *testing.T) {
 	fmt.Println("Test_StreamingDial")
 	sam, err := NewSAM(yoursam)
 	if err != nil {
-		fmt.Println(err.Error)
+		fmt.Println(err.Error())
 		t.Fail()
 		return
 	}
@@ -26,21 +30,21 @@ func Test_StreamingDial(t *testing.T) {
 		return
 	}
 	fmt.Println("\tBuilding tunnel")
-	ss, err := sam.NewStreamSession("streamTun", keys, []string{"inbound.length=0", "outbound.length=0", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
+	ss, err := sam.NewStreamSession("streamTun", keys, []string{"inbound.length=1", "outbound.length=1", "inbound.lengthVariance=0", "outbound.lengthVariance=0", "inbound.quantity=1", "outbound.quantity=1"})
 	if err != nil {
 		fmt.Println(err.Error())
 		t.Fail()
 		return
 	}
 	fmt.Println("\tNotice: This may fail if your I2P node is not well integrated in the I2P network.")
-	fmt.Println("\tLooking up forum.i2p")
-	forumAddr, err := sam.Lookup("forum.i2p")
+	fmt.Println("\tLooking up i2p-projekt.i2p")
+	forumAddr, err := sam.Lookup("i2p-projekt.i2p")
 	if err != nil {
 		fmt.Println(err.Error())
 		t.Fail()
 		return
 	}
-	fmt.Println("\tDialing forum.i2p")
+	fmt.Println("\tDialing i2p-projekt.i2p(", forumAddr.Base32(), forumAddr.DestHash().Hash(), ")")
 	conn, err := ss.DialI2P(forumAddr)
 	if err != nil {
 		fmt.Println(err.Error())
@@ -57,9 +61,9 @@ func Test_StreamingDial(t *testing.T) {
 	buf := make([]byte, 4096)
 	n, err := conn.Read(buf)
 	if !strings.Contains(strings.ToLower(string(buf[:n])), "http") && !strings.Contains(strings.ToLower(string(buf[:n])), "html") {
-		fmt.Printf("\tProbably failed to StreamSession.DialI2P(forum.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+		fmt.Printf("\tProbably failed to StreamSession.DialI2P(i2p-projekt.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
 	} else {
-		fmt.Println("\tRead HTTP/HTML from forum.i2p")
+		fmt.Println("\tRead HTTP/HTML from i2p-projekt.i2p")
 	}
 }
 
@@ -86,7 +90,7 @@ func Test_StreamingServerClient(t *testing.T) {
 		return
 	}
 	c, w := make(chan bool), make(chan bool)
-	go func(c, w chan(bool)) { 
+	go func(c, w chan (bool)) {
 		if !(<-w) {
 			return
 		}
@@ -140,14 +144,13 @@ func Test_StreamingServerClient(t *testing.T) {
 	}
 	defer conn.Close()
 	buf := make([]byte, 512)
-	n,err := conn.Read(buf)
+	n, err := conn.Read(buf)
 	fmt.Printf("\tClient exited successfully: %t\n", <-c)
 	fmt.Println("\tServer: received from Client: " + string(buf[:n]))
 }
 
-
 func ExampleStreamSession() {
-	// Creates a new StreamingSession, dials to zzz.i2p and gets a SAMConn
+	// Creates a new StreamingSession, dials to idk.i2p and gets a SAMConn
 	// which behaves just like a normal net.Conn.
 
 	const samBridge = "127.0.0.1:7656"
@@ -169,7 +172,7 @@ func ExampleStreamSession() {
 		fmt.Println(err.Error())
 		return
 	}
-	someone, err := sam.Lookup("zzz.i2p")
+	someone, err := sam.Lookup("idk.i2p")
 	if err != nil {
 		fmt.Println(err.Error())
 		return
@@ -189,15 +192,17 @@ func ExampleStreamSession() {
 	buf := make([]byte, 4096)
 	n, err := conn.Read(buf)
 	if !strings.Contains(strings.ToLower(string(buf[:n])), "http") && !strings.Contains(strings.ToLower(string(buf[:n])), "html") {
-		fmt.Printf("Probably failed to StreamSession.DialI2P(zzz.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+		fmt.Printf("Probably failed to StreamSession.DialI2P(idk.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
+		log.Printf("Probably failed to StreamSession.DialI2P(idk.i2p)? It replied %d bytes, but nothing that looked like http/html", n)
 	} else {
-		fmt.Println("Read HTTP/HTML from zzz.i2p")
+		fmt.Println("Read HTTP/HTML from idk.i2p")
+		log.Println("Read HTTP/HTML from idk.i2p")
 	}
 	return
 
 	// Output:
 	//Sending HTTP GET /
-	//Read HTTP/HTML from zzz.i2p
+	//Read HTTP/HTML from idk.i2p
 }
 
 func ExampleStreamListener() {
@@ -222,7 +227,7 @@ func ExampleStreamListener() {
 	quit := make(chan bool)
 
 	// Client connecting to the server
-	go func(server I2PAddr) {
+	go func(server i2pkeys.I2PAddr) {
 		csam, err := NewSAM(samBridge)
 		if err != nil {
 			fmt.Println(err.Error())

suggestedOptions.go

@@ -10,17 +10,30 @@ var (
 		"inbound.quantity=6", "outbound.quantity=6"}
 
 	// Suitable for shuffling a lot of traffic.
-	Options_Fat = []string{"inbound.length=3", "outbound.length=3",
+	Options_Large = []string{"inbound.length=3", "outbound.length=3",
 		"inbound.lengthVariance=1", "outbound.lengthVariance=1",
 		"inbound.backupQuantity=1", "outbound.backupQuantity=1",
 		"inbound.quantity=4", "outbound.quantity=4"}
 
+	// Suitable for shuffling a lot of traffic quickly with minimum
+	// anonymity. Uses 1 hop and multiple tunnels.
+	Options_Wide = []string{"inbound.length=1", "outbound.length=1",
+		"inbound.lengthVariance=1", "outbound.lengthVariance=1",
+		"inbound.backupQuantity=2", "outbound.backupQuantity=2",
+		"inbound.quantity=3", "outbound.quantity=3"}
+
 	// Suitable for shuffling medium amounts of traffic.
 	Options_Medium = []string{"inbound.length=3", "outbound.length=3",
 		"inbound.lengthVariance=1", "outbound.lengthVariance=1",
 		"inbound.backupQuantity=0", "outbound.backupQuantity=0",
 		"inbound.quantity=2", "outbound.quantity=2"}
 
+	// Sensible defaults for most people
+	Options_Default = []string{"inbound.length=3", "outbound.length=3",
+		"inbound.lengthVariance=0", "outbound.lengthVariance=0",
+		"inbound.backupQuantity=1", "outbound.backupQuantity=1",
+		"inbound.quantity=1", "outbound.quantity=1"}
+
 	// Suitable only for small dataflows, and very short lasting connections:
 	// You only have one tunnel in each direction, so if any of the nodes
 	// through which any of your two tunnels pass through go offline, there will