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fix: dns resolution taking long and add caching options (#8)

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This commit is contained in:
Karol Broda
2025-12-24 11:12:39 +01:00
committed by Karol Broda
parent 933da8bad2
commit 49948de0ed
13 changed files with 1302 additions and 67 deletions
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7
cmd/ls.go
View File

@@ -30,8 +30,6 @@ var (
sortBy string
fields string
colorMode string
resolveAddrs bool
resolvePorts bool
plainOutput bool
)
@@ -400,10 +398,9 @@ func init() {
lsCmd.Flags().StringVarP(&sortBy, "sort", "s", cfg.Defaults.SortBy, "Sort by column (e.g., pid:desc)")
lsCmd.Flags().StringVarP(&fields, "fields", "f", strings.Join(cfg.Defaults.Fields, ","), "Comma-separated list of fields to show")
lsCmd.Flags().StringVar(&colorMode, "color", cfg.Defaults.Color, "Color mode (auto, always, never)")
lsCmd.Flags().BoolVar(&resolveAddrs, "resolve-addrs", !cfg.Defaults.Numeric, "Resolve IP addresses to hostnames")
lsCmd.Flags().BoolVar(&resolvePorts, "resolve-ports", false, "Resolve port numbers to service names")
lsCmd.Flags().BoolVarP(&plainOutput, "plain", "p", false, "Plain output (parsable, no styling)")
// shared filter flags
// shared flags
addFilterFlags(lsCmd)
addResolutionFlags(lsCmd)
}

5
cmd/root.go
View File

@@ -45,9 +45,8 @@ func init() {
cfg := config.Get()
rootCmd.Flags().StringVar(&topTheme, "theme", cfg.Defaults.Theme, "Theme for TUI (see 'snitch themes')")
rootCmd.Flags().DurationVarP(&topInterval, "interval", "i", 0, "Refresh interval (default 1s)")
rootCmd.Flags().BoolVar(&topResolveAddrs, "resolve-addrs", !cfg.Defaults.Numeric, "Resolve IP addresses to hostnames")
rootCmd.Flags().BoolVar(&topResolvePorts, "resolve-ports", false, "Resolve port numbers to service names")
// shared filter flags for root command
// shared flags for root command
addFilterFlags(rootCmd)
addResolutionFlags(rootCmd)
}

47
cmd/runtime.go
View File

@@ -4,6 +4,8 @@ import (
"fmt"
"github.com/karol-broda/snitch/internal/collector"
"github.com/karol-broda/snitch/internal/color"
"github.com/karol-broda/snitch/internal/config"
"github.com/karol-broda/snitch/internal/resolver"
"strconv"
"strings"
@@ -11,7 +13,7 @@ import (
)
// Runtime holds the shared state for all commands.
// it handles common filter logic, fetching, and filtering connections.
// it handles common filter logic, fetching, filtering, and resolution.
type Runtime struct {
// filter options built from flags and args
Filters collector.FilterOptions
@@ -23,6 +25,7 @@ type Runtime struct {
ColorMode string
ResolveAddrs bool
ResolvePorts bool
NoCache bool
}
// shared filter flags - used by all commands
@@ -35,6 +38,13 @@ var (
filterIPv6 bool
)
// shared resolution flags - used by all commands
var (
resolveAddrs bool
resolvePorts bool
noCache bool
)
// BuildFilters constructs FilterOptions from command args and shortcut flags.
func BuildFilters(args []string) (collector.FilterOptions, error) {
filters, err := ParseFilterArgs(args)
@@ -77,6 +87,12 @@ func FetchConnections(filters collector.FilterOptions) ([]collector.Connection,
func NewRuntime(args []string, colorMode string) (*Runtime, error) {
color.Init(colorMode)
cfg := config.Get()
// configure resolver with cache setting (flag overrides config)
effectiveNoCache := noCache || !cfg.Defaults.DNSCache
resolver.SetNoCache(effectiveNoCache)
filters, err := BuildFilters(args)
if err != nil {
return nil, fmt.Errorf("failed to parse filters: %w", err)
@@ -87,13 +103,30 @@ func NewRuntime(args []string, colorMode string) (*Runtime, error) {
return nil, fmt.Errorf("failed to fetch connections: %w", err)
}
return &Runtime{
rt := &Runtime{
Filters: filters,
Connections: connections,
ColorMode: colorMode,
ResolveAddrs: resolveAddrs,
ResolvePorts: resolvePorts,
}, nil
NoCache: effectiveNoCache,
}
// pre-warm dns cache by resolving all addresses in parallel
if resolveAddrs {
rt.PreWarmDNS()
}
return rt, nil
}
// PreWarmDNS resolves all connection addresses in parallel to warm the cache.
func (r *Runtime) PreWarmDNS() {
addrs := make([]string, 0, len(r.Connections)*2)
for _, c := range r.Connections {
addrs = append(addrs, c.Laddr, c.Raddr)
}
resolver.ResolveAddrsParallel(addrs)
}
// SortConnections sorts the runtime's connections in place.
@@ -201,3 +234,11 @@ func addFilterFlags(cmd *cobra.Command) {
cmd.Flags().BoolVarP(&filterIPv6, "ipv6", "6", false, "Only show IPv6 connections")
}
// addResolutionFlags adds the common resolution flags to a command.
func addResolutionFlags(cmd *cobra.Command) {
cfg := config.Get()
cmd.Flags().BoolVar(&resolveAddrs, "resolve-addrs", !cfg.Defaults.Numeric, "Resolve IP addresses to hostnames")
cmd.Flags().BoolVar(&resolvePorts, "resolve-ports", false, "Resolve port numbers to service names")
cmd.Flags().BoolVar(&noCache, "no-cache", !cfg.Defaults.DNSCache, "Disable DNS caching (force fresh lookups)")
}

525
cmd/runtime_test.go Normal file
View File

@@ -0,0 +1,525 @@
package cmd
import (
"testing"
"github.com/karol-broda/snitch/internal/collector"
)
func TestParseFilterArgs_Empty(t *testing.T) {
filters, err := ParseFilterArgs([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "" {
t.Errorf("expected empty proto, got %q", filters.Proto)
}
}
func TestParseFilterArgs_Proto(t *testing.T) {
filters, err := ParseFilterArgs([]string{"proto=tcp"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "tcp" {
t.Errorf("expected proto 'tcp', got %q", filters.Proto)
}
}
func TestParseFilterArgs_State(t *testing.T) {
filters, err := ParseFilterArgs([]string{"state=LISTEN"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.State != "LISTEN" {
t.Errorf("expected state 'LISTEN', got %q", filters.State)
}
}
func TestParseFilterArgs_PID(t *testing.T) {
filters, err := ParseFilterArgs([]string{"pid=1234"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Pid != 1234 {
t.Errorf("expected pid 1234, got %d", filters.Pid)
}
}
func TestParseFilterArgs_InvalidPID(t *testing.T) {
_, err := ParseFilterArgs([]string{"pid=notanumber"})
if err == nil {
t.Error("expected error for invalid pid")
}
}
func TestParseFilterArgs_Proc(t *testing.T) {
filters, err := ParseFilterArgs([]string{"proc=nginx"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proc != "nginx" {
t.Errorf("expected proc 'nginx', got %q", filters.Proc)
}
}
func TestParseFilterArgs_Lport(t *testing.T) {
filters, err := ParseFilterArgs([]string{"lport=80"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Lport != 80 {
t.Errorf("expected lport 80, got %d", filters.Lport)
}
}
func TestParseFilterArgs_InvalidLport(t *testing.T) {
_, err := ParseFilterArgs([]string{"lport=notaport"})
if err == nil {
t.Error("expected error for invalid lport")
}
}
func TestParseFilterArgs_Rport(t *testing.T) {
filters, err := ParseFilterArgs([]string{"rport=443"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Rport != 443 {
t.Errorf("expected rport 443, got %d", filters.Rport)
}
}
func TestParseFilterArgs_InvalidRport(t *testing.T) {
_, err := ParseFilterArgs([]string{"rport=invalid"})
if err == nil {
t.Error("expected error for invalid rport")
}
}
func TestParseFilterArgs_UserByName(t *testing.T) {
filters, err := ParseFilterArgs([]string{"user=root"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.User != "root" {
t.Errorf("expected user 'root', got %q", filters.User)
}
}
func TestParseFilterArgs_UserByUID(t *testing.T) {
filters, err := ParseFilterArgs([]string{"user=1000"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.UID != 1000 {
t.Errorf("expected uid 1000, got %d", filters.UID)
}
}
func TestParseFilterArgs_Laddr(t *testing.T) {
filters, err := ParseFilterArgs([]string{"laddr=127.0.0.1"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Laddr != "127.0.0.1" {
t.Errorf("expected laddr '127.0.0.1', got %q", filters.Laddr)
}
}
func TestParseFilterArgs_Raddr(t *testing.T) {
filters, err := ParseFilterArgs([]string{"raddr=8.8.8.8"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Raddr != "8.8.8.8" {
t.Errorf("expected raddr '8.8.8.8', got %q", filters.Raddr)
}
}
func TestParseFilterArgs_Contains(t *testing.T) {
filters, err := ParseFilterArgs([]string{"contains=google"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Contains != "google" {
t.Errorf("expected contains 'google', got %q", filters.Contains)
}
}
func TestParseFilterArgs_Interface(t *testing.T) {
filters, err := ParseFilterArgs([]string{"if=eth0"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Interface != "eth0" {
t.Errorf("expected interface 'eth0', got %q", filters.Interface)
}
// test alternative syntax
filters2, err := ParseFilterArgs([]string{"interface=lo"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters2.Interface != "lo" {
t.Errorf("expected interface 'lo', got %q", filters2.Interface)
}
}
func TestParseFilterArgs_Mark(t *testing.T) {
filters, err := ParseFilterArgs([]string{"mark=0x1234"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Mark != "0x1234" {
t.Errorf("expected mark '0x1234', got %q", filters.Mark)
}
}
func TestParseFilterArgs_Namespace(t *testing.T) {
filters, err := ParseFilterArgs([]string{"namespace=default"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Namespace != "default" {
t.Errorf("expected namespace 'default', got %q", filters.Namespace)
}
}
func TestParseFilterArgs_Inode(t *testing.T) {
filters, err := ParseFilterArgs([]string{"inode=123456"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Inode != 123456 {
t.Errorf("expected inode 123456, got %d", filters.Inode)
}
}
func TestParseFilterArgs_InvalidInode(t *testing.T) {
_, err := ParseFilterArgs([]string{"inode=notanumber"})
if err == nil {
t.Error("expected error for invalid inode")
}
}
func TestParseFilterArgs_Multiple(t *testing.T) {
filters, err := ParseFilterArgs([]string{"proto=tcp", "state=LISTEN", "lport=80"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "tcp" {
t.Errorf("expected proto 'tcp', got %q", filters.Proto)
}
if filters.State != "LISTEN" {
t.Errorf("expected state 'LISTEN', got %q", filters.State)
}
if filters.Lport != 80 {
t.Errorf("expected lport 80, got %d", filters.Lport)
}
}
func TestParseFilterArgs_InvalidFormat(t *testing.T) {
_, err := ParseFilterArgs([]string{"invalidformat"})
if err == nil {
t.Error("expected error for invalid format")
}
}
func TestParseFilterArgs_UnknownKey(t *testing.T) {
_, err := ParseFilterArgs([]string{"unknownkey=value"})
if err == nil {
t.Error("expected error for unknown key")
}
}
func TestParseFilterArgs_CaseInsensitiveKeys(t *testing.T) {
filters, err := ParseFilterArgs([]string{"PROTO=tcp", "State=LISTEN"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "tcp" {
t.Errorf("expected proto 'tcp', got %q", filters.Proto)
}
if filters.State != "LISTEN" {
t.Errorf("expected state 'LISTEN', got %q", filters.State)
}
}
func TestBuildFilters_TCPOnly(t *testing.T) {
// save and restore global flags
oldTCP, oldUDP := filterTCP, filterUDP
defer func() {
filterTCP, filterUDP = oldTCP, oldUDP
}()
filterTCP = true
filterUDP = false
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "tcp" {
t.Errorf("expected proto 'tcp', got %q", filters.Proto)
}
}
func TestBuildFilters_UDPOnly(t *testing.T) {
oldTCP, oldUDP := filterTCP, filterUDP
defer func() {
filterTCP, filterUDP = oldTCP, oldUDP
}()
filterTCP = false
filterUDP = true
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "udp" {
t.Errorf("expected proto 'udp', got %q", filters.Proto)
}
}
func TestBuildFilters_ListenOnly(t *testing.T) {
oldListen, oldEstab := filterListen, filterEstab
defer func() {
filterListen, filterEstab = oldListen, oldEstab
}()
filterListen = true
filterEstab = false
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.State != "LISTEN" {
t.Errorf("expected state 'LISTEN', got %q", filters.State)
}
}
func TestBuildFilters_EstablishedOnly(t *testing.T) {
oldListen, oldEstab := filterListen, filterEstab
defer func() {
filterListen, filterEstab = oldListen, oldEstab
}()
filterListen = false
filterEstab = true
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.State != "ESTABLISHED" {
t.Errorf("expected state 'ESTABLISHED', got %q", filters.State)
}
}
func TestBuildFilters_IPv4Flag(t *testing.T) {
oldIPv4 := filterIPv4
defer func() {
filterIPv4 = oldIPv4
}()
filterIPv4 = true
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if !filters.IPv4 {
t.Error("expected IPv4 to be true")
}
}
func TestBuildFilters_IPv6Flag(t *testing.T) {
oldIPv6 := filterIPv6
defer func() {
filterIPv6 = oldIPv6
}()
filterIPv6 = true
filters, err := BuildFilters([]string{})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if !filters.IPv6 {
t.Error("expected IPv6 to be true")
}
}
func TestBuildFilters_CombinedArgsAndFlags(t *testing.T) {
oldTCP := filterTCP
defer func() {
filterTCP = oldTCP
}()
filterTCP = true
filters, err := BuildFilters([]string{"lport=80"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if filters.Proto != "tcp" {
t.Errorf("expected proto 'tcp', got %q", filters.Proto)
}
if filters.Lport != 80 {
t.Errorf("expected lport 80, got %d", filters.Lport)
}
}
func TestRuntime_PreWarmDNS(t *testing.T) {
rt := &Runtime{
Connections: []collector.Connection{
{Laddr: "127.0.0.1", Raddr: "192.168.1.1"},
{Laddr: "127.0.0.1", Raddr: "10.0.0.1"},
},
}
// should not panic
rt.PreWarmDNS()
}
func TestRuntime_PreWarmDNS_Empty(t *testing.T) {
rt := &Runtime{
Connections: []collector.Connection{},
}
// should not panic with empty connections
rt.PreWarmDNS()
}
func TestRuntime_SortConnections(t *testing.T) {
rt := &Runtime{
Connections: []collector.Connection{
{Lport: 443},
{Lport: 80},
{Lport: 8080},
},
}
rt.SortConnections(collector.SortOptions{
Field: collector.SortByLport,
Direction: collector.SortAsc,
})
if rt.Connections[0].Lport != 80 {
t.Errorf("expected first connection to have lport 80, got %d", rt.Connections[0].Lport)
}
if rt.Connections[1].Lport != 443 {
t.Errorf("expected second connection to have lport 443, got %d", rt.Connections[1].Lport)
}
if rt.Connections[2].Lport != 8080 {
t.Errorf("expected third connection to have lport 8080, got %d", rt.Connections[2].Lport)
}
}
func TestRuntime_SortConnections_Desc(t *testing.T) {
rt := &Runtime{
Connections: []collector.Connection{
{Lport: 80},
{Lport: 443},
{Lport: 8080},
},
}
rt.SortConnections(collector.SortOptions{
Field: collector.SortByLport,
Direction: collector.SortDesc,
})
if rt.Connections[0].Lport != 8080 {
t.Errorf("expected first connection to have lport 8080, got %d", rt.Connections[0].Lport)
}
}
func TestApplyFilter_AllKeys(t *testing.T) {
tests := []struct {
key string
value string
validate func(t *testing.T, f *collector.FilterOptions)
}{
{"proto", "tcp", func(t *testing.T, f *collector.FilterOptions) {
if f.Proto != "tcp" {
t.Errorf("proto: expected 'tcp', got %q", f.Proto)
}
}},
{"state", "LISTEN", func(t *testing.T, f *collector.FilterOptions) {
if f.State != "LISTEN" {
t.Errorf("state: expected 'LISTEN', got %q", f.State)
}
}},
{"pid", "100", func(t *testing.T, f *collector.FilterOptions) {
if f.Pid != 100 {
t.Errorf("pid: expected 100, got %d", f.Pid)
}
}},
{"proc", "nginx", func(t *testing.T, f *collector.FilterOptions) {
if f.Proc != "nginx" {
t.Errorf("proc: expected 'nginx', got %q", f.Proc)
}
}},
{"lport", "80", func(t *testing.T, f *collector.FilterOptions) {
if f.Lport != 80 {
t.Errorf("lport: expected 80, got %d", f.Lport)
}
}},
{"rport", "443", func(t *testing.T, f *collector.FilterOptions) {
if f.Rport != 443 {
t.Errorf("rport: expected 443, got %d", f.Rport)
}
}},
{"laddr", "127.0.0.1", func(t *testing.T, f *collector.FilterOptions) {
if f.Laddr != "127.0.0.1" {
t.Errorf("laddr: expected '127.0.0.1', got %q", f.Laddr)
}
}},
{"raddr", "8.8.8.8", func(t *testing.T, f *collector.FilterOptions) {
if f.Raddr != "8.8.8.8" {
t.Errorf("raddr: expected '8.8.8.8', got %q", f.Raddr)
}
}},
{"contains", "test", func(t *testing.T, f *collector.FilterOptions) {
if f.Contains != "test" {
t.Errorf("contains: expected 'test', got %q", f.Contains)
}
}},
{"if", "eth0", func(t *testing.T, f *collector.FilterOptions) {
if f.Interface != "eth0" {
t.Errorf("interface: expected 'eth0', got %q", f.Interface)
}
}},
{"mark", "0xff", func(t *testing.T, f *collector.FilterOptions) {
if f.Mark != "0xff" {
t.Errorf("mark: expected '0xff', got %q", f.Mark)
}
}},
{"namespace", "ns1", func(t *testing.T, f *collector.FilterOptions) {
if f.Namespace != "ns1" {
t.Errorf("namespace: expected 'ns1', got %q", f.Namespace)
}
}},
{"inode", "12345", func(t *testing.T, f *collector.FilterOptions) {
if f.Inode != 12345 {
t.Errorf("inode: expected 12345, got %d", f.Inode)
}
}},
}
for _, tt := range tests {
t.Run(tt.key, func(t *testing.T) {
filters := &collector.FilterOptions{}
err := applyFilter(filters, tt.key, tt.value)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tt.validate(t, filters)
})
}
}

21
cmd/top.go
View File

@@ -6,16 +6,15 @@ import (
tea "github.com/charmbracelet/bubbletea"
"github.com/karol-broda/snitch/internal/config"
"github.com/karol-broda/snitch/internal/resolver"
"github.com/karol-broda/snitch/internal/tui"
"github.com/spf13/cobra"
)
// top-specific flags
var (
topTheme string
topInterval time.Duration
topResolveAddrs bool
topResolvePorts bool
topTheme string
topInterval time.Duration
)
var topCmd = &cobra.Command{
@@ -29,11 +28,16 @@ var topCmd = &cobra.Command{
theme = cfg.Defaults.Theme
}
// configure resolver with cache setting
effectiveNoCache := noCache || !cfg.Defaults.DNSCache
resolver.SetNoCache(effectiveNoCache)
opts := tui.Options{
Theme: theme,
Interval: topInterval,
ResolveAddrs: topResolveAddrs,
ResolvePorts: topResolvePorts,
ResolveAddrs: resolveAddrs,
ResolvePorts: resolvePorts,
NoCache: effectiveNoCache,
}
// if any filter flag is set, use exclusive mode
@@ -62,9 +66,8 @@ func init() {
// top-specific flags
topCmd.Flags().StringVar(&topTheme, "theme", cfg.Defaults.Theme, "Theme for TUI (see 'snitch themes')")
topCmd.Flags().DurationVarP(&topInterval, "interval", "i", time.Second, "Refresh interval")
topCmd.Flags().BoolVar(&topResolveAddrs, "resolve-addrs", !cfg.Defaults.Numeric, "Resolve IP addresses to hostnames")
topCmd.Flags().BoolVar(&topResolvePorts, "resolve-ports", false, "Resolve port numbers to service names")
// shared filter flags
// shared flags
addFilterFlags(topCmd)
addResolutionFlags(topCmd)
}

29
cmd/trace.go
View File

@@ -7,12 +7,14 @@ import (
"log"
"os"
"os/signal"
"github.com/karol-broda/snitch/internal/collector"
"github.com/karol-broda/snitch/internal/resolver"
"strings"
"syscall"
"time"
"github.com/karol-broda/snitch/internal/collector"
"github.com/karol-broda/snitch/internal/config"
"github.com/karol-broda/snitch/internal/resolver"
"github.com/spf13/cobra"
)
@@ -23,11 +25,10 @@ type TraceEvent struct {
}
var (
traceInterval time.Duration
traceCount int
traceInterval time.Duration
traceCount int
traceOutputFormat string
traceNumeric bool
traceTimestamp bool
traceTimestamp bool
)
var traceCmd = &cobra.Command{
@@ -47,6 +48,12 @@ Available filters:
}
func runTraceCommand(args []string) {
cfg := config.Get()
// configure resolver with cache setting
effectiveNoCache := noCache || !cfg.Defaults.DNSCache
resolver.SetNoCache(effectiveNoCache)
filters, err := BuildFilters(args)
if err != nil {
log.Fatalf("Error parsing filters: %v", err)
@@ -180,14 +187,16 @@ func printTraceEventHuman(event TraceEvent) {
lportStr := fmt.Sprintf("%d", conn.Lport)
rportStr := fmt.Sprintf("%d", conn.Rport)
// Handle name resolution based on numeric flag
if !traceNumeric {
// apply name resolution
if resolveAddrs {
if resolvedLaddr := resolver.ResolveAddr(conn.Laddr); resolvedLaddr != conn.Laddr {
laddr = resolvedLaddr
}
if resolvedRaddr := resolver.ResolveAddr(conn.Raddr); resolvedRaddr != conn.Raddr && conn.Raddr != "*" && conn.Raddr != "" {
raddr = resolvedRaddr
}
}
if resolvePorts {
if resolvedLport := resolver.ResolvePort(conn.Lport, conn.Proto); resolvedLport != fmt.Sprintf("%d", conn.Lport) {
lportStr = resolvedLport
}
@@ -225,9 +234,9 @@ func init() {
traceCmd.Flags().DurationVarP(&traceInterval, "interval", "i", time.Second, "Polling interval (e.g., 500ms, 2s)")
traceCmd.Flags().IntVarP(&traceCount, "count", "c", 0, "Number of events to capture (0 = unlimited)")
traceCmd.Flags().StringVarP(&traceOutputFormat, "output", "o", "human", "Output format (human, json)")
traceCmd.Flags().BoolVarP(&traceNumeric, "numeric", "n", false, "Don't resolve hostnames")
traceCmd.Flags().BoolVar(&traceTimestamp, "ts", false, "Include timestamp in output")
// shared filter flags
// shared flags
addFilterFlags(traceCmd)
addResolutionFlags(traceCmd)
}