func (d *Discoverer) externalLookup(node string) (string, bool) {
extIP, err := net.ResolveUDPAddr("udp", d.extServer+":22025")
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
conn, err := net.DialUDP("udp", nil, extIP)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
defer conn.Close()
err = conn.SetDeadline(time.Now().Add(5 * time.Second))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
_, err = conn.Write(EncodePacket(Packet{QueryMagic, 0, node, nil}))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return "", false
}
var buf = buffers.Get(256)
defer buffers.Put(buf)
n, err := conn.Read(buf)
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
// Expected if the server doesn't know about requested node ID
return "", false
}
log.Printf("discover/external/read: %v; no external lookup", err)
return "", false
}
pkt, err := DecodePacket(buf[:n])
if err != nil {
log.Printf("discover/external/read: %v; no external lookup", err)
return "", false
}
if pkt.Magic != AnnouncementMagic {
log.Printf("discover/external/read: bad magic; no external lookup", err)
return "", false
}
return fmt.Sprintf("%s:%d", ipStr(pkt.IP), pkt.Port), true
}
func (r *marshalReader) readBytes() []byte {
if r.err != nil {
return nil
}
l := int(r.readUint32())
if r.err != nil {
return nil
}
if l > maxBytesFieldLength {
r.err = ErrFieldLengthExceeded
return nil
}
b := buffers.Get(l + pad(l))
_, r.err = io.ReadFull(r.r, b)
atomic.AddUint64(&r.tot, uint64(l+pad(l)))
return b[:l]
}
// Request returns the specified data segment by reading it from local disk.
// Implements the protocol.Model interface.
func (m *Model) Request(nodeID, repo, name string, offset int64, size int) ([]byte, error) {
// Verify that the requested file exists in the local model.
m.rmut.RLock()
r, ok := m.repoFiles[repo]
m.rmut.RUnlock()
if !ok {
l.Warnf("Request from %s for file %s in nonexistent repo %q", nodeID, name, repo)
return nil, ErrNoSuchFile
}
lf := r.Get(cid.LocalID, name)
if lf.Suppressed || lf.Flags&protocol.FlagDeleted != 0 {
if debug {
l.Debugf("REQ(in): %s: %q / %q o=%d s=%d; invalid: %v", nodeID, repo, name, offset, size, lf)
}
return nil, ErrInvalid
}
if offset > lf.Size {
if debug {
l.Debugf("REQ(in; nonexistent): %s: %q o=%d s=%d", nodeID, name, offset, size)
}
return nil, ErrNoSuchFile
}
if debug && nodeID != "<local>" {
l.Debugf("REQ(in): %s: %q / %q o=%d s=%d", nodeID, repo, name, offset, size)
}
m.rmut.RLock()
fn := filepath.Join(m.repoDirs[repo], name)
m.rmut.RUnlock()
fd, err := os.Open(fn) // XXX: Inefficient, should cache fd?
if err != nil {
return nil, err
}
defer fd.Close()
buf := buffers.Get(int(size))
_, err = fd.ReadAt(buf, offset)
if err != nil {
return nil, err
}
return buf, nil
}
func (p *puller) handleCopyBlock(b bqBlock) {
// We have blocks to copy from the existing file
f := b.file
of := p.openFiles[f.Name]
if debug {
l.Debugf("pull: copying %d blocks for %q / %q", len(b.copy), p.repo, f.Name)
}
var exfd *os.File
exfd, of.err = os.Open(of.filepath)
if of.err != nil {
if debug {
l.Debugf("pull: error: %q / %q: %v", p.repo, f.Name, of.err)
}
of.file.Close()
of.file = nil
p.openFiles[f.Name] = of
return
}
defer exfd.Close()
for _, b := range b.copy {
bs := buffers.Get(int(b.Size))
_, of.err = exfd.ReadAt(bs, b.Offset)
if of.err == nil {
_, of.err = of.file.WriteAt(bs, b.Offset)
}
buffers.Put(bs)
if of.err != nil {
if debug {
l.Debugf("pull: error: %q / %q: %v", p.repo, f.Name, of.err)
}
exfd.Close()
of.file.Close()
of.file = nil
p.openFiles[f.Name] = of
return
}
}
}
func (m *Model) Request(nodeID, name string, offset uint64, size uint32, hash []byte) ([]byte, error) {
if opts.Debug.TraceNet && nodeID != "<local>" {
debugf("NET REQ(in): %s: %q o=%d s=%d h=%x", nodeID, name, offset, size, hash)
}
fn := path.Join(m.dir, name)
fd, err := os.Open(fn) // XXX: Inefficient, should cache fd?
if err != nil {
return nil, err
}
defer fd.Close()
buf := buffers.Get(int(size))
_, err = fd.ReadAt(buf, int64(offset))
if err != nil {
return nil, err
}
return buf, nil
}
// Request returns the specified data segment by reading it from local disk.
// Implements the protocol.Model interface.
func (m *Model) Request(nodeID, name string, offset int64, size uint32, hash []byte) ([]byte, error) {
// Verify that the requested file exists in the local and global model.
m.lmut.RLock()
lf, localOk := m.local[name]
m.lmut.RUnlock()
m.gmut.RLock()
_, globalOk := m.global[name]
m.gmut.RUnlock()
if !localOk || !globalOk {
log.Printf("SECURITY (nonexistent file) REQ(in): %s: %q o=%d s=%d h=%x", nodeID, name, offset, size, hash)
return nil, ErrNoSuchFile
}
if lf.Flags&protocol.FlagInvalid != 0 {
return nil, ErrInvalid
}
if m.trace["net"] && nodeID != "<local>" {
log.Printf("NET REQ(in): %s: %q o=%d s=%d h=%x", nodeID, name, offset, size, hash)
}
fn := path.Join(m.dir, name)
fd, err := os.Open(fn) // XXX: Inefficient, should cache fd?
if err != nil {
return nil, err
}
defer fd.Close()
buf := buffers.Get(int(size))
_, err = fd.ReadAt(buf, offset)
if err != nil {
return nil, err
}
if m.limitRequestRate != nil {
for s := 0; s < len(buf); s += 1024 {
<-m.limitRequestRate
}
}
return buf, nil
}
func (m *fileMonitor) copyLocalBlocks(inFile, outFile *os.File, writeWg *sync.WaitGroup) {
defer inFile.Close()
defer writeWg.Done()
var buf = buffers.Get(BlockSize)
defer buffers.Put(buf)
for _, lb := range m.localBlocks {
buf = buf[:lb.Size]
_, err := inFile.ReadAt(buf, lb.Offset)
if err != nil {
m.copyError = err
return
}
_, err = outFile.WriteAt(buf, lb.Offset)
if err != nil {
m.copyError = err
return
}
}
}
func (d *Discoverer) externalLookup(node string) []string {
extIP, err := net.ResolveUDPAddr("udp", d.extServer)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
conn, err := net.DialUDP("udp", nil, extIP)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
defer conn.Close()
err = conn.SetDeadline(time.Now().Add(5 * time.Second))
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
buf := QueryV2{QueryMagicV2, node}.MarshalXDR()
_, err = conn.Write(buf)
if err != nil {
log.Printf("discover/external: %v; no external lookup", err)
return nil
}
buffers.Put(buf)
buf = buffers.Get(2048)
defer buffers.Put(buf)
n, err := conn.Read(buf)
if err != nil {
if err, ok := err.(net.Error); ok && err.Timeout() {
// Expected if the server doesn't know about requested node ID
return nil
}
log.Printf("discover/external/read: %v; no external lookup", err)
return nil
}
if debug {
dlog.Printf("read external:\n%s", hex.Dump(buf[:n]))
}
var pkt AnnounceV2
err = pkt.UnmarshalXDR(buf[:n])
if err != nil && err != io.EOF {
log.Println("discover/external/decode:", err)
return nil
}
if debug {
dlog.Printf("parsed external: %#v", pkt)
}
var addrs []string
for _, a := range pkt.This.Addresses {
nodeAddr := fmt.Sprintf("%s:%d", net.IP(a.IP), a.Port)
addrs = append(addrs, nodeAddr)
}
return addrs
}
