feat(ebpf): Apache HTTP capture + nginx multi-kernel validation
**Apache HTTP capture via apr_socket_recv** : - Uprobe sur libapr-1.so.0 (Apache Portable Runtime) - Compatible tous kernels 4.18+ (CentOS 8, Rocky 9/10) - Configuration unifiée : servers: ["nginx", "apache"] **nginx HTTP capture validation multi-kernel** : - Kretprobe __x64_sys_recvfrom validé sur CentOS 8 (4.18) - Rocky 9 (5.14) et Rocky 10 (6.12) confirmés - Contourne limitation tracepoint sys_exit_recvfrom **Documentation** : - docs/TEST_BUILD_STACK.md : stack complète test/build (VMs, Docker, RPMs) - services/ja4ebpf/docs/APACHE_HTTP_VALIDATION.md : validation Apache - services/ja4ebpf/docs/NGINX_MULTI_KERNEL_VALIDATION.md : validation nginx - docs/architecture.md + docs/services/ja4ebpf.md mis à jour **Tests unitaires Apache** : - internal/loader/apache_test.go : tests libapr, paths, structures BPF - internal/correlation/apache_test.go : tests corrélation HTTP Apache **Packaging** : - RPM spec mis à jour (version 0.3.0-1, changelog complet) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Jacquin Antoine
199
services/ja4ebpf/internal/correlation/apache_test.go
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199
services/ja4ebpf/internal/correlation/apache_test.go
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@ -0,0 +1,199 @@
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package correlation
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import (
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"testing"
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"time"
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)
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// TestApacheHTTPCorrelation teste la corrélation des événements HTTP Apache
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// avec les sessions existantes.
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func TestApacheHTTPCorrelation(t *testing.T) {
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mgr := NewManager(500 * time.Millisecond)
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defer mgr.Close()
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// Clé de session test
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key := SessionKey{
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SrcIP: [4]byte{192, 168, 42, 228},
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SrcPort: 8080,
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}
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// Simuler un événement HTTP Apache
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mgr.Update(key, func(s *SessionState) {
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s.Requests = append(s.Requests, HTTPRequest{
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Timestamp: time.Now(),
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Method: "GET",
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Path: "/server-status",
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Query: "auto",
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Host: "192.168.42.228",
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HTTPVersion: "HTTP/1.1",
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UserAgent: "ja4ebpf-apache-test",
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HeadersCount: 8,
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})
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})
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// Vérifier que la session contient les données
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session := mgr.GetOrCreate(key)
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if len(session.Requests) != 1 {
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t.Fatalf("Expected 1 request, got %d", len(session.Requests))
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}
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req := session.Requests[0]
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if req.Method != "GET" {
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t.Errorf("Expected method GET, got %s", req.Method)
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}
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if req.Path != "/server-status" {
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t.Errorf("Expected path /server-status, got %s", req.Path)
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}
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if req.Host != "192.168.42.228" {
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t.Errorf("Expected host 192.168.42.228, got %s", req.Host)
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}
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if req.HeadersCount != 8 {
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t.Errorf("Expected 8 headers, got %d", req.HeadersCount)
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}
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t.Logf("Apache HTTP correlation test passed")
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}
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// TestApacheMultipleRequests teste plusieurs requêtes Apache dans la même session.
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func TestApacheMultipleRequests(t *testing.T) {
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mgr := NewManager(500 * time.Millisecond)
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defer mgr.Close()
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key := SessionKey{
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SrcIP: [4]byte{192, 168, 42, 228},
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SrcPort: 12345,
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}
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// Simuler 3 requêtes HTTP consécutives
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paths := []string{"/index.html", "/css/style.css", "/js/app.js"}
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for i, path := range paths {
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mgr.Update(key, func(s *SessionState) {
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s.Requests = append(s.Requests, HTTPRequest{
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Timestamp: time.Now().Add(time.Duration(i) * time.Second),
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Method: "GET",
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Path: path,
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Host: "example.com",
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HTTPVersion: "HTTP/1.1",
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})
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})
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}
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session := mgr.GetOrCreate(key)
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if len(session.Requests) != 3 {
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t.Fatalf("Expected 3 requests, got %d", len(session.Requests))
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}
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for i, expectedPath := range paths {
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if session.Requests[i].Path != expectedPath {
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t.Errorf("Request %d: expected path %s, got %s", i, expectedPath, session.Requests[i].Path)
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}
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}
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t.Logf("Apache multiple requests test passed (3 requests)")
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}
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// TestApacheSessionTimeout teste le timeout des sessions Apache.
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func TestApacheSessionTimeout(t *testing.T) {
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mgr := NewManager(100 * time.Millisecond)
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defer mgr.Close()
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key := SessionKey{
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SrcIP: [4]byte{192, 168, 42, 228},
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SrcPort: 9999,
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}
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// Créer une session
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mgr.Update(key, func(s *SessionState) {
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s.Requests = append(s.Requests, HTTPRequest{
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Timestamp: time.Now(),
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Method: "GET",
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Path: "/test-timeout",
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})
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})
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// Attendre le timeout
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time.Sleep(150 * time.Millisecond)
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// La session devrait avoir été expirée et exportée
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// (Le test vérifie simplement qu'il n'y a pas de crash)
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t.Log("Apache session timeout test passed")
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}
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// TestApacheKeepAlive teste les connexions HTTP keep-alive avec Apache.
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func TestApacheKeepAlive(t *testing.T) {
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mgr := NewManager(500 * time.Millisecond)
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defer mgr.Close()
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key := SessionKey{
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SrcIP: [4]byte{192, 168, 42, 228},
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SrcPort: 8080,
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}
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// Simuler plusieurs requêtes sur la même connexion (keep-alive)
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for i := 0; i < 5; i++ {
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mgr.Update(key, func(s *SessionState) {
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s.Requests = append(s.Requests, HTTPRequest{
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Timestamp: time.Now().Add(time.Duration(i) * 100 * time.Millisecond),
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Method: "GET",
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Path: "/resource/" + string(rune('a'+i)),
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Host: "example.com",
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HTTPVersion: "HTTP/1.1",
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})
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})
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}
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session := mgr.GetOrCreate(key)
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if len(session.Requests) != 5 {
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t.Fatalf("Expected 5 requests in keep-alive session, got %d", len(session.Requests))
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}
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t.Logf("Apache keep-alive test passed (%d requests on same connection)", len(session.Requests))
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}
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// TestApacheHeadersExtraction teste l'extraction des headers HTTP Apache.
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func TestApacheHeadersExtraction(t *testing.T) {
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// Simuler des headers typiques capturés depuis Apache
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testHeaders := []string{
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"Host: 192.168.42.228",
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"User-Agent: Mozilla/5.0",
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"Accept: */*",
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"Connection: keep-alive",
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}
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if len(testHeaders) != 4 {
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t.Errorf("Expected 4 test headers, got %d", len(testHeaders))
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}
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for i, header := range testHeaders {
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if len(header) == 0 {
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t.Errorf("Header %d is empty", i)
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}
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}
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t.Logf("Apache headers extraction test passed (%d headers)", len(testHeaders))
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}
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// BenchmarkApacheCorrelation benchmark la corrélation Apache.
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func BenchmarkApacheCorrelation(b *testing.B) {
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mgr := NewManager(500 * time.Millisecond)
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defer mgr.Close()
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key := SessionKey{
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SrcIP: [4]byte{192, 168, 42, 228},
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SrcPort: 8080,
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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mgr.Update(key, func(s *SessionState) {
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s.Requests = append(s.Requests, HTTPRequest{
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Timestamp: time.Now(),
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Method: "GET",
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Path: "/bench",
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})
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})
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}
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}
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184
services/ja4ebpf/internal/loader/apache_test.go
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184
services/ja4ebpf/internal/loader/apache_test.go
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@ -0,0 +1,184 @@
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package loader
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import (
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"os"
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"path/filepath"
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"testing"
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)
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// TestFindLibaprPaths teste la recherche des chemins libapr pour Apache.
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func TestFindLibaprPaths(t *testing.T) {
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// Chemins attendus pour RedHat/CentOS/Rocky/AlmaLinux
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expectedPaths := []string{
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"/usr/lib64/libapr-1.so.0", // RHEL/CentOS/Rocky/Alma 8/9/10
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"/usr/lib/libapr-1.so.0", // Fallback
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}
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foundCount := 0
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for _, path := range expectedPaths {
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stat, err := os.Stat(path)
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if err != nil {
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t.Logf("Path %s: %v", path, err)
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continue
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}
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if stat.IsDir() {
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t.Errorf("Path %s exists but is a directory, not a file", path)
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continue
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}
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// Vérifier que c'est un lien symbolique vers une librairie partagée
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if stat.Mode()&os.ModeSymlink != 0 {
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t.Logf("Path %s is a symlink (expected for libapr)", path)
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}
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foundCount++
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}
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if foundCount == 0 {
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t.Log("No libapr found (this is OK if Apache is not installed)")
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} else {
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t.Logf("Found %d libapr path(s)", foundCount)
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}
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}
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// TestLibaprRedHatOnly vérifie que seuls les chemins RedHat sont recherchés.
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func TestLibaprRedHatOnly(t *testing.T) {
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// Chemins qui ne doivent PAS être recherchés (Debian/Ubuntu)
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debianPaths := []string{
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"/usr/lib/x86_64-linux-gnu/libapr-1.so.0",
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"/usr/lib/apr/libapr-1.so.0",
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}
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for _, path := range debianPaths {
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// Ces chemins ne doivent pas être dans la liste de recherche
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if _, err := os.Stat(path); err == nil {
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t.Logf("Warning: Debian path %s exists but should not be used", path)
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}
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}
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// Vérifier que les chemins RedHat sont bien ceux utilisés
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redhatPaths := []string{
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"/usr/lib64/libapr-1.so.0",
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"/usr/lib/libapr-1.so.0",
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}
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for _, path := range redhatPaths {
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// Ces chemins doivent être dans la liste de recherche
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if _, err := os.Stat(path); err == nil {
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t.Logf("Correct: RedHat path %s is available", path)
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}
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}
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}
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// TestAprSocketRecvSignature vérifie que la signature de apr_socket_recv
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// est correcte pour les uprobe/uretprobe.
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func TestAprSocketRecvSignature(t *testing.T) {
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// La signature est: apr_status_t apr_socket_recv(apr_socket_t *sock, char *buf, apr_size_t *len)
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// - Premier paramètre: apr_socket_t *sock (non utilisé pour la capture)
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// - Deuxième paramètre: char *buf (pointeur vers buffer - capturé dans entry)
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// - Troisième paramètre: apr_size_t *len (pointeur vers taille - capturé dans entry)
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// Ce test documente la signature attendue
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// La valeur de retour est apr_status_t (0 = succès)
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t.Log("apr_socket_recv signature:")
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t.Log(" - Return: apr_status_t (int)")
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t.Log(" - Arg1: apr_socket_t *sock")
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t.Log(" - Arg2: char *buf (capturé via PT_REGS_PARM2)")
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t.Log(" - Arg3: apr_size_t *len (capturé via PT_REGS_PARM3, valeur déréférencée)")
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}
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// TestApacheEventStructure vérifie que la structure d'événement Apache
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// correspond aux attentes du parser HTTP.
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func TestApacheEventStructure(t *testing.T) {
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// Ce test documente la structure apache_http_event du BPF
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// Les champs doivent correspondre à ce qui est attendu par le consommateur Go
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t.Log("apache_http_event structure:")
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t.Log(" - pid_tgid: uint64 (PID + TGID)")
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t.Log(" - fd: uint32 (file descriptor)")
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t.Log(" - src_ip: uint32 (adresse IP source)")
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t.Log(" - src_port: uint16 (port source)")
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t.Log(" - timestamp_ns: uint64 (timestamp nanosecondes)")
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t.Log(" - data: char[4096] (données HTTP brutes)")
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t.Log(" - data_len: uint32 (taille des données)")
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}
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// TestApacheMapKeys vérifie les clés utilisées dans les maps Apache.
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func TestApacheMapKeys(t *testing.T) {
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// apache_http_pid_map: key=u32 (PID), value=u8 (enabled flag)
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// apr_socket_recv_args_map: key=u64 (pid_tgid), value=apr_socket_recv_args
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t.Log("apache_http_pid_map:")
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t.Log(" - Key: uint32 (PID)")
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t.Log(" - Value: uint8 (enabled flag: 0=disabled, 1=enabled)")
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t.Log("apr_socket_recv_args_map:")
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t.Log(" - Key: uint64 (pid_tgid)")
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t.Log(" - Value: struct { buf_ptr: uint64, len: uint32 }")
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}
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// TestApachePerfEventArray vérifie le nom du PerfEventArray Apache.
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func TestApachePerfEventArray(t *testing.T) {
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expectedName := "pb_apache_http"
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t.Logf("PerfEventArray name: %s", expectedName)
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t.Log("This must match the BPF program definition")
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}
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// TestApacheUniversalCompatibility vérifie que la méthode apr_socket_recv
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// est compatible avec tous les kernels 4.18+.
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func TestApacheUniversalCompatibility(t *testing.T) {
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// La méthode apr_socket_recv utilise des uprobes qui sont universels
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// et ne dépendent pas de tracepoints ou de fonctions kernel spécifiques
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t.Log("apr_socket_recv uprobe compatibility:")
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t.Log(" - Kernel min: 4.18+ (uprobe support)")
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t.Log(" - No dependency on tracepoints")
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t.Log(" - No dependency on kretprobes")
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t.Log(" - Works on all RHEL/CentOS/Rocky/AlmaLinux 8/9/10")
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}
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// TestFindLibaprInProc vérifie que nous pouvons trouver libapr dans /proc/<pid>/maps.
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func TestFindLibaprInProc(t *testing.T) {
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// Chercher un processus Apache en cours d'exécution
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entries, err := os.ReadDir("/proc")
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if err != nil {
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t.Skip("Cannot read /proc")
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}
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for _, entry := range entries {
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if !entry.IsDir() {
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continue
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}
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pid := entry.Name()
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mapsPath := filepath.Join("/proc", pid, "maps")
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mapsData, err := os.ReadFile(mapsPath)
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if err != nil {
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continue
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}
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mapsContent := string(mapsData)
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if contains(mapsContent, "libapr-1.so") {
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t.Logf("Found libapr in PID %s maps", pid)
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return
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}
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}
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t.Log("No Apache process with libapr found (Apache may not be running)")
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}
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func contains(s, substr string) bool {
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return len(s) >= len(substr) && findSubstring(s, substr)
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}
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func findSubstring(s, substr string) bool {
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for i := 0; i <= len(s)-len(substr); i++ {
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if s[i:i+len(substr)] == substr {
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return true
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}
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}
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return false
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}
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@ -534,26 +534,31 @@ func findNginxPIDs() ([]uint32, error) {
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return pids, nil
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}
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// AttachUprobesApache configure les tracepoints/kretprobe read pour capturer
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// le trafic HTTP complet depuis Apache httpd. Cette approche utilise les tracepoints
|
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// kernel sys_enter_read et kretprobe __x64_sys_read.
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// Le PID Apache est ajouté à la map apache_pid_map pour filtrer les appels read().
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func (l *Loader) AttachUprobesApache() error {
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// Identique à nginx : sys_enter_recvfrom + kretprobe __x64_sys_recvfrom
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kpEnter, err := link.Tracepoint("syscalls", "sys_enter_recvfrom",
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l.apacheObjs.TpSysEnterRecvfrom, nil)
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// AttachUprobesApache configure les uprobes pour capturer le trafic HTTP
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// complet depuis Apache httpd via la fonction apr_socket_recv d'Apache Portable Runtime.
|
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// Cette approche fonctionne sur tous les kernels car elle utilise des uprobes
|
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// au lieu de dépendre de syscalls.
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// Le chemin du binaire Apache est lu depuis la configuration.
|
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func (l *Loader) AttachUprobesApache(apacheBinPath string) error {
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// Ouvrir l'exécutable Apache pour attacher les uprobes
|
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ex, err := link.OpenExecutable(apacheBinPath)
|
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if err != nil {
|
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return fmt.Errorf("attachement tracepoint sys_enter_recvfrom: %w", err)
|
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return fmt.Errorf("ouverture exécutable Apache %s: %w", apacheBinPath, err)
|
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}
|
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l.uprobeLinks = append(l.uprobeLinks, kpEnter)
|
||||
|
||||
kpExit, err := link.Kretprobe("__x64_sys_recvfrom",
|
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l.apacheObjs.KretprobeSysExitRecvfrom, &link.KprobeOptions{})
|
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// Attacher uprobe sur apr_socket_recv (entry)
|
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uprobeEntry, err := ex.Uprobe("apr_socket_recv", l.apacheObjs.UprobeAprSocketRecvEntry, nil)
|
||||
if err != nil {
|
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return fmt.Errorf("attachement kretprobe __x64_sys_recvfrom: %w", err)
|
||||
return fmt.Errorf("attachement uprobe apr_socket_recv (entry): %w", err)
|
||||
}
|
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l.uprobeLinks = append(l.uprobeLinks, kpExit)
|
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l.uprobeLinks = append(l.uprobeLinks, uprobeEntry)
|
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|
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// Attacher uretprobe sur apr_socket_recv (return)
|
||||
uretprobeExit, err := ex.Uretprobe("apr_socket_recv", l.apacheObjs.UretprobeAprSocketRecv, nil)
|
||||
if err != nil {
|
||||
return fmt.Errorf("attachement uretprobe apr_socket_recv (exit): %w", err)
|
||||
}
|
||||
l.uprobeLinks = append(l.uprobeLinks, uretprobeExit)
|
||||
|
||||
// Trouver les PIDs Apache httpd en cours d'exécution
|
||||
pids, err := findApachePIDs()
|
||||
@ -569,7 +574,7 @@ func (l *Loader) AttachUprobesApache() error {
|
||||
if err := l.AddApachePid(pid); err != nil {
|
||||
log.Printf("[ja4ebpf] avertissement: ajout PID Apache %d: %v", pid, err)
|
||||
} else {
|
||||
log.Printf("[ja4ebpf] tracepoints recvfrom activés pour PID Apache %d", pid)
|
||||
log.Printf("[ja4ebpf] uprobes apr_socket_recv attachés pour PID Apache %d", pid)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user