perso/syncthing-arm
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Large refactoring/feature commit

Browse Source 
1. Change listen addresses to URIs
2. Break out connectionSvc to support listeners and dialers based on schema
3. Add relay announcement and lookups part of discovery service
This commit is contained in:
Audrius Butkevicius
2015-06-23 13:55:30 +01:00
parent 50702eda94
commit 34c04babbe
18 changed files with 657 additions and 321 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/discover/client.go
View File

@@ -43,7 +43,7 @@ func New(addr string, pkt *Announce) (Client, error) {
}
type Client interface {
Lookup(device protocol.DeviceID) []string
Lookup(device protocol.DeviceID) (Announce, error)
StatusOK() bool
Address() string
Stop()

28
lib/discover/client_test.go
View File

@@ -37,10 +37,8 @@ func TestUDP4Success(t *testing.T) {
Magic: AnnouncementMagic,
This: Device{
device[:],
[]Address{{
IP: net.IPv4(123, 123, 123, 123),
Port: 1234,
}},
[]string{"tcp://123.123.123.123:1234"},
nil,
},
}
@@ -101,7 +99,12 @@ func TestUDP4Success(t *testing.T) {
wg := sync.NewWaitGroup()
wg.Add(1)
go func() {
addrs = client.Lookup(device)
pkt, err := client.Lookup(device)
if err == nil {
for _, addr := range pkt.This.Addresses {
addrs = append(addrs, addr)
}
}
wg.Done()
}()
@@ -117,7 +120,7 @@ func TestUDP4Success(t *testing.T) {
// Wait for the lookup to arrive, verify that the number of answers is correct
wg.Wait()
if len(addrs) != 1 || addrs[0] != "123.123.123.123:1234" {
if len(addrs) != 1 || addrs[0] != "tcp://123.123.123.123:1234" {
t.Fatal("Wrong number of answers")
}
@@ -138,10 +141,8 @@ func TestUDP4Failure(t *testing.T) {
Magic: AnnouncementMagic,
This: Device{
device[:],
[]Address{{
IP: net.IPv4(123, 123, 123, 123),
Port: 1234,
}},
[]string{"tcp://123.123.123.123:1234"},
nil,
},
}
@@ -197,7 +198,12 @@ func TestUDP4Failure(t *testing.T) {
wg := sync.NewWaitGroup()
wg.Add(1)
go func() {
addrs = client.Lookup(device)
pkt, err := client.Lookup(device)
if err == nil {
for _, addr := range pkt.This.Addresses {
addrs = append(addrs, addr)
}
}
wg.Done()
}()

35
lib/discover/client_udp.go
View File

@@ -137,11 +137,13 @@ func (d *UDPClient) broadcast(pkt []byte) {
time.Sleep(1 * time.Second)
res := d.Lookup(d.id)
if debug {
l.Debugf("discover %s: broadcast: Self-lookup returned: %v", d.url, res)
pkt, err := d.Lookup(d.id)
if err != nil && debug {
l.Debugf("discover %s: broadcast: Self-lookup failed: %v", d.url, err)
} else if debug {
l.Debugf("discover %s: broadcast: Self-lookup returned: %v", d.url, pkt.This.Addresses)
}
ok = len(res) > 0
ok = len(pkt.This.Addresses) > 0
}
d.mut.Lock()
@@ -157,13 +159,13 @@ func (d *UDPClient) broadcast(pkt []byte) {
}
}
func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
func (d *UDPClient) Lookup(device protocol.DeviceID) (Announce, error) {
extIP, err := net.ResolveUDPAddr(d.url.Scheme, d.url.Host)
if err != nil {
if debug {
l.Debugf("discover %s: Lookup(%s): %s", d.url, device, err)
}
return nil
return Announce{}, err
}
conn, err := net.DialUDP(d.url.Scheme, d.listenAddress, extIP)
@@ -171,7 +173,7 @@ func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
if debug {
l.Debugf("discover %s: Lookup(%s): %s", d.url, device, err)
}
return nil
return Announce{}, err
}
defer conn.Close()
@@ -180,7 +182,7 @@ func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
if debug {
l.Debugf("discover %s: Lookup(%s): %s", d.url, device, err)
}
return nil
return Announce{}, err
}
buf := Query{QueryMagic, device[:]}.MustMarshalXDR()
@@ -189,7 +191,7 @@ func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
if debug {
l.Debugf("discover %s: Lookup(%s): %s", d.url, device, err)
}
return nil
return Announce{}, err
}
buf = make([]byte, 2048)
@@ -197,12 +199,12 @@ func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
// Expected if the server doesn't know about requested device ID
return nil
return Announce{}, err
}
if debug {
l.Debugf("discover %s: Lookup(%s): %s", d.url, device, err)
}
return nil
return Announce{}, err
}
var pkt Announce
@@ -211,18 +213,13 @@ func (d *UDPClient) Lookup(device protocol.DeviceID) []string {
if debug {
l.Debugf("discover %s: Lookup(%s): %s\n%s", d.url, device, err, hex.Dump(buf[:n]))
}
return nil
return Announce{}, err
}
var addrs []string
for _, a := range pkt.This.Addresses {
deviceAddr := net.JoinHostPort(net.IP(a.IP).String(), strconv.Itoa(int(a.Port)))
addrs = append(addrs, deviceAddr)
}
if debug {
l.Debugf("discover %s: Lookup(%s) result: %v", d.url, device, addrs)
l.Debugf("discover %s: Lookup(%s) result: %v relays: %v", d.url, device, pkt.This.Addresses, pkt.This.Relays)
}
return addrs
return pkt, nil
}
func (d *UDPClient) Stop() {

268
lib/discover/discover.go
View File

@@ -10,21 +10,25 @@ import (
"bytes"
"encoding/hex"
"errors"
"fmt"
"io"
"net"
"net/url"
"runtime"
"strconv"
"sort"
"time"
"github.com/syncthing/protocol"
"github.com/syncthing/syncthing/lib/beacon"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/osutil"
"github.com/syncthing/syncthing/lib/sync"
)
type Discoverer struct {
myID protocol.DeviceID
listenAddrs []string
relays []Relay
localBcastIntv time.Duration
localBcastStart time.Time
cacheLifetime time.Duration
@@ -34,9 +38,10 @@ type Discoverer struct {
localBcastTick <-chan time.Time
forcedBcastTick chan time.Time
registryLock sync.RWMutex
registry map[protocol.DeviceID][]CacheEntry
lastLookup map[protocol.DeviceID]time.Time
registryLock sync.RWMutex
addressRegistry map[protocol.DeviceID][]CacheEntry
relayRegistry map[protocol.DeviceID][]CacheEntry
lastLookup map[protocol.DeviceID]time.Time
clients []Client
mut sync.RWMutex
@@ -51,17 +56,19 @@ var (
ErrIncorrectMagic = errors.New("incorrect magic number")
)
func NewDiscoverer(id protocol.DeviceID, addresses []string) *Discoverer {
func NewDiscoverer(id protocol.DeviceID, addresses []string, relayAdresses []string) *Discoverer {
return &Discoverer{
myID: id,
listenAddrs: addresses,
localBcastIntv: 30 * time.Second,
cacheLifetime: 5 * time.Minute,
negCacheCutoff: 3 * time.Minute,
registry: make(map[protocol.DeviceID][]CacheEntry),
lastLookup: make(map[protocol.DeviceID]time.Time),
registryLock: sync.NewRWMutex(),
mut: sync.NewRWMutex(),
myID: id,
listenAddrs: addresses,
relays: measureLatency(relayAdresses),
localBcastIntv: 30 * time.Second,
cacheLifetime: 5 * time.Minute,
negCacheCutoff: 3 * time.Minute,
addressRegistry: make(map[protocol.DeviceID][]CacheEntry),
relayRegistry: make(map[protocol.DeviceID][]CacheEntry),
lastLookup: make(map[protocol.DeviceID]time.Time),
registryLock: sync.NewRWMutex(),
mut: sync.NewRWMutex(),
}
}
@@ -184,75 +191,108 @@ func (d *Discoverer) ExtAnnounceOK() map[string]bool {
return ret
}
func (d *Discoverer) Lookup(device protocol.DeviceID) []string {
// Lookup returns a list of addresses the device is available at, as well as
// a list of relays the device is supposed to be available on sorted by the
// sum of latencies between this device, and the device in question.
func (d *Discoverer) Lookup(device protocol.DeviceID) ([]string, []string) {
d.registryLock.RLock()
cached := d.filterCached(d.registry[device])
cachedAddresses := d.filterCached(d.addressRegistry[device])
cachedRelays := d.filterCached(d.relayRegistry[device])
lastLookup := d.lastLookup[device]
d.registryLock.RUnlock()
d.mut.RLock()
defer d.mut.RUnlock()
if len(cached) > 0 {
relays := make([]string, len(cachedRelays))
for i := range cachedRelays {
relays[i] = cachedRelays[i].Address
}
if len(cachedAddresses) > 0 {
// There are cached address entries.
addrs := make([]string, len(cached))
for i := range cached {
addrs[i] = cached[i].Address
addrs := make([]string, len(cachedAddresses))
for i := range cachedAddresses {
addrs[i] = cachedAddresses[i].Address
}
return addrs
return addrs, relays
}
if time.Since(lastLookup) < d.negCacheCutoff {
// We have recently tried to lookup this address and failed. Lets
// chill for a while.
return nil
return nil, relays
}
if len(d.clients) != 0 && time.Since(d.localBcastStart) > d.localBcastIntv {
// Only perform external lookups if we have at least one external
// server client and one local announcement interval has passed. This is
// to avoid finding local peers on their remote address at startup.
results := make(chan []string, len(d.clients))
results := make(chan Announce, len(d.clients))
wg := sync.NewWaitGroup()
for _, client := range d.clients {
wg.Add(1)
go func(c Client) {
defer wg.Done()
results <- c.Lookup(device)
ann, err := c.Lookup(device)
if err == nil {
results <- ann
}
}(client)
}
wg.Wait()
close(results)
cached := []CacheEntry{}
seen := make(map[string]struct{})
cachedAddresses := []CacheEntry{}
availableRelays := []Relay{}
seenAddresses := make(map[string]struct{})
seenRelays := make(map[string]struct{})
now := time.Now()
var addrs []string
for result := range results {
for _, addr := range result {
_, ok := seen[addr]
for _, addr := range result.This.Addresses {
_, ok := seenAddresses[addr]
if !ok {
cached = append(cached, CacheEntry{
cachedAddresses = append(cachedAddresses, CacheEntry{
Address: addr,
Seen: now,
})
seen[addr] = struct{}{}
seenAddresses[addr] = struct{}{}
addrs = append(addrs, addr)
}
}
for _, relay := range result.This.Relays {
_, ok := seenRelays[relay.Address]
if !ok {
availableRelays = append(availableRelays, relay)
seenRelays[relay.Address] = struct{}{}
}
}
}
relays = addressesSortedByLatency(availableRelays)
cachedRelays := make([]CacheEntry, len(relays))
for i := range relays {
cachedRelays[i] = CacheEntry{
Address: relays[i],
Seen: now,
}
}
d.registryLock.Lock()
d.registry[device] = cached
d.addressRegistry[device] = cachedAddresses
d.relayRegistry[device] = cachedRelays
d.lastLookup[device] = time.Now()
d.registryLock.Unlock()
return addrs
return addrs, relays
}
return nil
return nil, relays
}
func (d *Discoverer) Hint(device string, addrs []string) {
@@ -267,8 +307,8 @@ func (d *Discoverer) Hint(device string, addrs []string) {
func (d *Discoverer) All() map[protocol.DeviceID][]CacheEntry {
d.registryLock.RLock()
devices := make(map[protocol.DeviceID][]CacheEntry, len(d.registry))
for device, addrs := range d.registry {
devices := make(map[protocol.DeviceID][]CacheEntry, len(d.addressRegistry))
for device, addrs := range d.addressRegistry {
addrsCopy := make([]CacheEntry, len(addrs))
copy(addrsCopy, addrs)
devices[device] = addrsCopy
@@ -278,30 +318,38 @@ func (d *Discoverer) All() map[protocol.DeviceID][]CacheEntry {
}
func (d *Discoverer) announcementPkt() *Announce {
var addrs []Address
var addrs []string
if d.extPort != 0 {
addrs = []Address{{Port: d.extPort}}
addrs = []string{fmt.Sprintf("tcp://:%d", d.extPort)}
} else {
for _, astr := range d.listenAddrs {
addr, err := net.ResolveTCPAddr("tcp", astr)
for _, aurl := range d.listenAddrs {
uri, err := url.Parse(aurl)
if err != nil {
l.Warnln("discover: %v: not announcing %s", err, astr)
if debug {
l.Debugf("discovery: failed to parse listen address %s: %s", aurl, err)
}
continue
}
addr, err := net.ResolveTCPAddr("tcp", uri.Host)
if err != nil {
l.Warnln("discover: %v: not announcing %s", err, aurl)
continue
} else if debug {
l.Debugf("discover: resolved %s as %#v", astr, addr)
l.Debugf("discover: resolved %s as %#v", aurl, uri.Host)
}
if len(addr.IP) == 0 || addr.IP.IsUnspecified() {
addrs = append(addrs, Address{Port: uint16(addr.Port)})
uri.Host = fmt.Sprintf(":%d", addr.Port)
} else if bs := addr.IP.To4(); bs != nil {
addrs = append(addrs, Address{IP: bs, Port: uint16(addr.Port)})
uri.Host = fmt.Sprintf("%s:%d", bs.String(), addr.Port)
} else if bs := addr.IP.To16(); bs != nil {
addrs = append(addrs, Address{IP: bs, Port: uint16(addr.Port)})
uri.Host = fmt.Sprintf("[%s]:%d", bs.String(), addr.Port)
}
addrs = append(addrs, uri.String())
}
}
return &Announce{
Magic: AnnouncementMagic,
This: Device{d.myID[:], addrs},
This: Device{d.myID[:], addrs, d.relays},
}
}
@@ -310,7 +358,7 @@ func (d *Discoverer) sendLocalAnnouncements() {
var pkt = Announce{
Magic: AnnouncementMagic,
This: Device{d.myID[:], addrs},
This: Device{d.myID[:], addrs, d.relays},
}
msg := pkt.MustMarshalXDR()
@@ -363,19 +411,32 @@ func (d *Discoverer) registerDevice(addr net.Addr, device Device) bool {
d.registryLock.Lock()
defer d.registryLock.Unlock()
current := d.filterCached(d.registry[id])
current := d.filterCached(d.addressRegistry[id])
orig := current
for _, a := range device.Addresses {
var deviceAddr string
if len(a.IP) > 0 {
deviceAddr = net.JoinHostPort(net.IP(a.IP).String(), strconv.Itoa(int(a.Port)))
} else if addr != nil {
ua := addr.(*net.UDPAddr)
ua.Port = int(a.Port)
deviceAddr = ua.String()
for _, deviceAddr := range device.Addresses {
uri, err := url.Parse(deviceAddr)
if err != nil {
if debug {
l.Debugf("discover: Failed to parse address %s: %s", deviceAddr, err)
}
continue
}
host, port, err := net.SplitHostPort(uri.Host)
if err != nil {
if debug {
l.Debugf("discover: Failed to split address host %s: %s", deviceAddr, err)
}
continue
}
if host == "" {
uri.Host = net.JoinHostPort(addr.(*net.UDPAddr).IP.String(), port)
deviceAddr = uri.String()
}
for i := range current {
if current[i].Address == deviceAddr {
current[i].Seen = time.Now()
@@ -393,7 +454,7 @@ func (d *Discoverer) registerDevice(addr net.Addr, device Device) bool {
l.Debugf("discover: Caching %s addresses: %v", id, current)
}
d.registry[id] = current
d.addressRegistry[id] = current
if len(current) > len(orig) {
addrs := make([]string, len(current))
@@ -413,7 +474,7 @@ func (d *Discoverer) filterCached(c []CacheEntry) []CacheEntry {
for i := 0; i < len(c); {
if ago := time.Since(c[i].Seen); ago > d.cacheLifetime {
if debug {
l.Debugf("discover: Removing cached address %s - seen %v ago", c[i].Address, ago)
l.Debugf("discover: Removing cached entry %s - seen %v ago", c[i].Address, ago)
}
c[i] = c[len(c)-1]
c = c[:len(c)-1]
@@ -424,30 +485,99 @@ func (d *Discoverer) filterCached(c []CacheEntry) []CacheEntry {
return c
}
func addrToAddr(addr *net.TCPAddr) Address {
func addrToAddr(addr *net.TCPAddr) string {
if len(addr.IP) == 0 || addr.IP.IsUnspecified() {
return Address{Port: uint16(addr.Port)}
return fmt.Sprintf(":%d", addr.Port)
} else if bs := addr.IP.To4(); bs != nil {
return Address{IP: bs, Port: uint16(addr.Port)}
return fmt.Sprintf("%s:%d", bs.String(), addr.Port)
} else if bs := addr.IP.To16(); bs != nil {
return Address{IP: bs, Port: uint16(addr.Port)}
return fmt.Sprintf("[%s]:%d", bs.String(), addr.Port)
}
return Address{}
return ""
}
func resolveAddrs(addrs []string) []Address {
var raddrs []Address
func resolveAddrs(addrs []string) []string {
var raddrs []string
for _, addrStr := range addrs {
addrRes, err := net.ResolveTCPAddr("tcp", addrStr)
uri, err := url.Parse(addrStr)
if err != nil {
continue
}
addrRes, err := net.ResolveTCPAddr("tcp", uri.Host)
if err != nil {
continue
}
addr := addrToAddr(addrRes)
if len(addr.IP) > 0 {
raddrs = append(raddrs, addr)
} else {
raddrs = append(raddrs, Address{Port: addr.Port})
if len(addr) > 0 {
uri.Host = addr
raddrs = append(raddrs, uri.String())
}
}
return raddrs
}
func measureLatency(relayAdresses []string) []Relay {
relays := make([]Relay, 0, len(relayAdresses))
for i, addr := range relayAdresses {
relay := Relay{
Address: addr,
Latency: int32(time.Hour / time.Millisecond),
}
relays = append(relays, relay)
if latency, err := getLatencyForURL(addr); err == nil {
if debug {
l.Debugf("Relay %s latency %s", addr, latency)
}
relays[i].Latency = int32(latency / time.Millisecond)
} else {
l.Debugf("Failed to get relay %s latency %s", addr, err)
}
}
return relays
}
// addressesSortedByLatency adds local latency to the relay, and sorts them
// by sum latency, and returns the addresses.
func addressesSortedByLatency(input []Relay) []string {
relays := make([]Relay, len(input))
copy(relays, input)
for i, relay := range relays {
if latency, err := getLatencyForURL(relay.Address); err == nil {
relays[i].Latency += int32(latency / time.Millisecond)
} else {
relays[i].Latency += int32(time.Hour / time.Millisecond)
}
}
sort.Sort(relayList(relays))
addresses := make([]string, 0, len(relays))
for _, relay := range relays {
addresses = append(addresses, relay.Address)
}
return addresses
}
func getLatencyForURL(addr string) (time.Duration, error) {
uri, err := url.Parse(addr)
if err != nil {
return 0, err
}
return osutil.TCPPing(uri.Host)
}
type relayList []Relay
func (l relayList) Len() int {
return len(l)
}
func (l relayList) Less(a, b int) bool {
return l[a].Latency < l[b].Latency
}
func (l relayList) Swap(a, b int) {
l[a], l[b] = l[b], l[a]
}

42
lib/discover/discover_test.go
View File

@@ -18,15 +18,15 @@ import (
type DummyClient struct {
url *url.URL
lookups []protocol.DeviceID
lookupRet []string
lookupRet Announce
stops int
statusRet bool
statusChecks int
}
func (c *DummyClient) Lookup(device protocol.DeviceID) []string {
func (c *DummyClient) Lookup(device protocol.DeviceID) (Announce, error) {
c.lookups = append(c.lookups, device)
return c.lookupRet
return c.lookupRet, nil
}
func (c *DummyClient) StatusOK() bool {
@@ -45,17 +45,41 @@ func (c *DummyClient) Address() string {
func TestGlobalDiscovery(t *testing.T) {
c1 := &DummyClient{
statusRet: false,
lookupRet: []string{"test.com:1234"},
lookupRet: Announce{
Magic: AnnouncementMagic,
This: Device{
ID: protocol.LocalDeviceID[:],
Addresses: []string{"test.com:1234"},
Relays: nil,
},
Extra: nil,
},
}
c2 := &DummyClient{
statusRet: true,
lookupRet: []string{},
lookupRet: Announce{
Magic: AnnouncementMagic,
This: Device{
ID: protocol.LocalDeviceID[:],
Addresses: nil,
Relays: nil,
},
Extra: nil,
},
}
c3 := &DummyClient{
statusRet: true,
lookupRet: []string{"best.com:2345"},
lookupRet: Announce{
Magic: AnnouncementMagic,
This: Device{
ID: protocol.LocalDeviceID[:],
Addresses: []string{"best.com:2345"},
Relays: nil,
},
Extra: nil,
},
}
clients := []*DummyClient{c1, c2}
@@ -72,7 +96,7 @@ func TestGlobalDiscovery(t *testing.T) {
return c3, nil
})
d := NewDiscoverer(device, []string{})
d := NewDiscoverer(device, []string{}, nil)
d.localBcastStart = time.Time{}
servers := []string{
"test1://123.123.123.123:1234",
@@ -93,7 +117,7 @@ func TestGlobalDiscovery(t *testing.T) {
}
}
addrs := d.Lookup(device)
addrs, _ := d.Lookup(device)
if len(addrs) != 2 {
t.Fatal("Wrong number of addresses", addrs)
}
@@ -117,7 +141,7 @@ func TestGlobalDiscovery(t *testing.T) {
}
}
addrs = d.Lookup(device)
addrs, _ = d.Lookup(device)
if len(addrs) != 2 {
t.Fatal("Wrong number of addresses", addrs)
}

17
lib/discover/packets.go
View File

@@ -10,8 +10,8 @@
package discover
const (
AnnouncementMagic = 0x9D79BC39
QueryMagic = 0x2CA856F5
AnnouncementMagic = 0x9D79BC40
QueryMagic = 0x2CA856F6
)
type Query struct {
@@ -25,12 +25,13 @@ type Announce struct {
Extra []Device // max:16
}
type Device struct {
ID []byte // max:32
Addresses []Address // max:16
type Relay struct {
Address string // max:256
Latency int32
}
type Address struct {
IP []byte // max:16
Port uint16
type Device struct {
ID []byte // max:32
Addresses []string // max:16
Relays []Relay // max:16
}

185
lib/discover/packets_xdr.go
View File

@@ -187,6 +187,80 @@ func (o *Announce) DecodeXDRFrom(xr *xdr.Reader) error {
/*
Relay Structure:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length of Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ /
\ Address (variable length) \
/ /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Latency |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
struct Relay {
string Address<256>;
int Latency;
}
*/
func (o Relay) EncodeXDR(w io.Writer) (int, error) {
var xw = xdr.NewWriter(w)
return o.EncodeXDRInto(xw)
}
func (o Relay) MarshalXDR() ([]byte, error) {
return o.AppendXDR(make([]byte, 0, 128))
}
func (o Relay) MustMarshalXDR() []byte {
bs, err := o.MarshalXDR()
if err != nil {
panic(err)
}
return bs
}
func (o Relay) AppendXDR(bs []byte) ([]byte, error) {
var aw = xdr.AppendWriter(bs)
var xw = xdr.NewWriter(&aw)
_, err := o.EncodeXDRInto(xw)
return []byte(aw), err
}
func (o Relay) EncodeXDRInto(xw *xdr.Writer) (int, error) {
if l := len(o.Address); l > 256 {
return xw.Tot(), xdr.ElementSizeExceeded("Address", l, 256)
}
xw.WriteString(o.Address)
xw.WriteUint32(uint32(o.Latency))
return xw.Tot(), xw.Error()
}
func (o *Relay) DecodeXDR(r io.Reader) error {
xr := xdr.NewReader(r)
return o.DecodeXDRFrom(xr)
}
func (o *Relay) UnmarshalXDR(bs []byte) error {
var br = bytes.NewReader(bs)
var xr = xdr.NewReader(br)
return o.DecodeXDRFrom(xr)
}
func (o *Relay) DecodeXDRFrom(xr *xdr.Reader) error {
o.Address = xr.ReadStringMax(256)
o.Latency = int32(xr.ReadUint32())
return xr.Error()
}
/*
Device Structure:
0 1 2 3
@@ -200,15 +274,24 @@ Device Structure:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number of Addresses |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length of Addresses |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ /
\ Zero or more Address Structures \
\ Addresses (variable length) \
/ /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number of Relays |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ /
\ Zero or more Relay Structures \
/ /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
struct Device {
opaque ID<32>;
Address Addresses<16>;
string Addresses<16>;
Relay Relays<16>;
}
*/
@@ -247,7 +330,14 @@ func (o Device) EncodeXDRInto(xw *xdr.Writer) (int, error) {
}
xw.WriteUint32(uint32(len(o.Addresses)))
for i := range o.Addresses {
_, err := o.Addresses[i].EncodeXDRInto(xw)
xw.WriteString(o.Addresses[i])
}
if l := len(o.Relays); l > 16 {
return xw.Tot(), xdr.ElementSizeExceeded("Relays", l, 16)
}
xw.WriteUint32(uint32(len(o.Relays)))
for i := range o.Relays {
_, err := o.Relays[i].EncodeXDRInto(xw)
if err != nil {
return xw.Tot(), err
}
@@ -275,83 +365,20 @@ func (o *Device) DecodeXDRFrom(xr *xdr.Reader) error {
if _AddressesSize > 16 {
return xdr.ElementSizeExceeded("Addresses", _AddressesSize, 16)
}
o.Addresses = make([]Address, _AddressesSize)
o.Addresses = make([]string, _AddressesSize)
for i := range o.Addresses {
(&o.Addresses[i]).DecodeXDRFrom(xr)
o.Addresses[i] = xr.ReadString()
}
_RelaysSize := int(xr.ReadUint32())
if _RelaysSize < 0 {
return xdr.ElementSizeExceeded("Relays", _RelaysSize, 16)
}
if _RelaysSize > 16 {
return xdr.ElementSizeExceeded("Relays", _RelaysSize, 16)
}
o.Relays = make([]Relay, _RelaysSize)
for i := range o.Relays {
(&o.Relays[i]).DecodeXDRFrom(xr)
}
return xr.Error()
}
/*
Address Structure:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length of IP |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
/ /
\ IP (variable length) \
/ /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0x0000 | Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
struct Address {
opaque IP<16>;
unsigned int Port;
}
*/
func (o Address) EncodeXDR(w io.Writer) (int, error) {
var xw = xdr.NewWriter(w)
return o.EncodeXDRInto(xw)
}
func (o Address) MarshalXDR() ([]byte, error) {
return o.AppendXDR(make([]byte, 0, 128))
}
func (o Address) MustMarshalXDR() []byte {
bs, err := o.MarshalXDR()
if err != nil {
panic(err)
}
return bs
}
func (o Address) AppendXDR(bs []byte) ([]byte, error) {
var aw = xdr.AppendWriter(bs)
var xw = xdr.NewWriter(&aw)
_, err := o.EncodeXDRInto(xw)
return []byte(aw), err
}
func (o Address) EncodeXDRInto(xw *xdr.Writer) (int, error) {
if l := len(o.IP); l > 16 {
return xw.Tot(), xdr.ElementSizeExceeded("IP", l, 16)
}
xw.WriteBytes(o.IP)
xw.WriteUint16(o.Port)
return xw.Tot(), xw.Error()
}
func (o *Address) DecodeXDR(r io.Reader) error {
xr := xdr.NewReader(r)
return o.DecodeXDRFrom(xr)
}
func (o *Address) UnmarshalXDR(bs []byte) error {
var br = bytes.NewReader(bs)
var xr = xdr.NewReader(br)
return o.DecodeXDRFrom(xr)
}
func (o *Address) DecodeXDRFrom(xr *xdr.Reader) error {
o.IP = xr.ReadBytesMax(16)
o.Port = xr.ReadUint16()
return xr.Error()
}