/
capinfoui.go
141 lines (113 loc) · 3.36 KB
/
capinfoui.go
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// Copyright 2019-2022 Graham Clark. All rights reserved. Use of this source
// code is governed by the MIT license that can be found in the LICENSE
// file.
// Package ui contains user-interface functions and helpers for termshark.
package ui
import (
"os"
"strings"
"time"
"github.com/gcla/gowid"
"github.com/gcla/termshark/v2"
"github.com/gcla/termshark/v2/pkg/capinfo"
"github.com/gcla/termshark/v2/pkg/pcap"
log "github.com/sirupsen/logrus"
)
var CapinfoLoader *capinfo.Loader
var CapinfoData string
var CapinfoTime time.Time
//======================================================================
func startCapinfo(app gowid.IApp) {
if Loader.PcapPdml == "" {
OpenError("No pcap loaded.", app)
return
}
fi, err := os.Stat(Loader.PcapPdml)
if err != nil || CapinfoTime.Before(fi.ModTime()) {
CapinfoLoader = capinfo.NewLoader(capinfo.MakeCommands(), Loader.Context())
handler := capinfoParseHandler{}
CapinfoLoader.StartLoad(
Loader.PcapPdml,
app,
&handler,
)
} else {
OpenMessageForCopy(CapinfoData, appView, app)
}
}
//======================================================================
type capinfoParseHandler struct {
tick *time.Ticker // for updating the spinner
stop chan struct{}
pleaseWaitClosed bool
}
var _ capinfo.ICapinfoCallbacks = (*capinfoParseHandler)(nil)
var _ pcap.IBeforeBegin = (*capinfoParseHandler)(nil)
var _ pcap.IAfterEnd = (*capinfoParseHandler)(nil)
func (t *capinfoParseHandler) OnCapinfoData(data string) {
CapinfoData = strings.Replace(data, "\r\n", "\n", -1) // For windows...
fi, err := os.Stat(Loader.PcapPdml)
if err != nil {
log.Warnf("Could not read mtime from pcap %s: %v", Loader.PcapPdml, err)
} else {
CapinfoTime = fi.ModTime()
}
}
func (t *capinfoParseHandler) AfterCapinfoEnd(success bool) {
}
func (t *capinfoParseHandler) BeforeBegin(code pcap.HandlerCode, app gowid.IApp) {
if code&pcap.CapinfoCode == 0 {
return
}
app.Run(gowid.RunFunction(func(app gowid.IApp) {
OpenPleaseWait(appView, app)
}))
t.tick = time.NewTicker(time.Duration(200) * time.Millisecond)
t.stop = make(chan struct{})
termshark.TrackedGo(func() {
Loop:
for {
select {
case <-t.tick.C:
app.Run(gowid.RunFunction(func(app gowid.IApp) {
pleaseWaitSpinner.Update()
}))
case <-t.stop:
break Loop
}
}
}, Goroutinewg)
}
func (t *capinfoParseHandler) AfterEnd(code pcap.HandlerCode, app gowid.IApp) {
if code&pcap.CapinfoCode == 0 {
return
}
app.Run(gowid.RunFunction(func(app gowid.IApp) {
if !t.pleaseWaitClosed {
t.pleaseWaitClosed = true
ClosePleaseWait(app)
}
OpenMessageForCopy(CapinfoData, appView, app)
}))
close(t.stop)
}
//======================================================================
func clearCapinfoState() {
CapinfoTime = time.Time{}
}
//======================================================================
type ManageCapinfoCache struct{}
var _ pcap.INewSource = ManageCapinfoCache{}
var _ pcap.IClear = ManageCapinfoCache{}
// Make sure that existing stream widgets are discarded if the user loads a new pcap.
func (t ManageCapinfoCache) OnNewSource(pcap.HandlerCode, gowid.IApp) {
clearCapinfoState()
}
func (t ManageCapinfoCache) OnClear(pcap.HandlerCode, gowid.IApp) {
clearCapinfoState()
}
//======================================================================
// Local Variables:
// mode: Go
// fill-column: 110
// End: