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package hook
import (
"bytes"
"encoding/hex"
"fmt"
"os"
"path"
"time"
"tunnel/pkg/config"
"tunnel/pkg/server/env"
"tunnel/pkg/server/opts"
"tunnel/pkg/server/queue"
)
const dumpDefaultFile = "/tmp/tunnel/dump"
type dump struct {
f *os.File
h *dumpHook
}
type dumpHook struct {
file string
time bool
}
func (t *dump) write(s string, p []byte) error {
var out bytes.Buffer
if t.h.time {
now := time.Now().Format(config.TimeMsFormat)
fmt.Fprintln(&out, now, s, len(p))
} else {
fmt.Fprintln(&out, s, len(p))
}
w := hex.Dumper(&out)
w.Write(p)
w.Close()
if _, err := t.f.Write(out.Bytes()); err != nil {
return err
}
return nil
}
func (t *dump) Send(rq, wq queue.Q) error {
for b := range rq {
t.write(">", b)
wq <- b
}
return nil
}
func (t *dump) Recv(rq, wq queue.Q) error {
for b := range rq {
t.write("<", b)
wq <- b
}
return nil
}
func (t *dump) Close() {
t.f.Close()
}
func (h *dumpHook) where(env env.Env) string {
if h.file != "" {
return h.file
}
if v := env.Value("dump.file"); v != "" {
return v
}
return dumpDefaultFile
}
func (h *dumpHook) Open(env env.Env) (interface{}, error) {
file := h.where(env)
dir := path.Dir(file)
if err := os.MkdirAll(dir, 0755); err != nil {
return nil, err
}
tid, sid := env.Get("tunnel"), env.Get("stream")
name := fmt.Sprintf("%s.%s.%s", file, tid, sid)
t := &dump{h: h}
if f, err := os.Create(name); err != nil {
return nil, err
} else {
t.f = f
}
return t, nil
}
func newDumpHook(opts opts.Opts) (hook, error) {
h := &dumpHook{
file: opts["file"],
time: opts.Bool("time"),
}
return h, nil
}
func init() {
register("dump", newDumpHook)
}
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