pgsql matcher bug fix

matcher/pgsql/pgsql.go

@@ -5,6 +5,7 @@ import (
 	"encoding/binary"
 	"loafle.com/overflow/commons_go/matcher/packet"
 	"loafle.com/overflow/commons_go/model/scaninfo"
+	"strings"
 )
 
 const (
@@ -40,6 +41,18 @@ type pgsqlErrResponse struct {
 	Message      [53]byte
 }
 
+type pgsqlErrResponse2 struct {
+	ResponseType uint8
+	Len          [4]byte
+	Data         [128]byte
+	//Severity     [6]byte
+	//_            byte
+	//Code         [6]byte
+	//_            byte
+	//Message      [53]byte
+}
+
+
 type PostgreSQLMatcher struct {
 	packets []*packet.Packet
 }
@@ -133,7 +146,7 @@ func (t *PostgreSQLMatcher) Match(index int, packet *packet.Packet, info scaninf
 	reader := new(bytes.Buffer)
 	reader.Write(packet.Buffer)
 
-	pg := pgsqlErrResponse{}
+	pg := pgsqlErrResponse2{}
 	if err := binary.Read(reader, binary.BigEndian, &pg); err != nil {
 		return false
 	}
@@ -142,14 +155,29 @@ func (t *PostgreSQLMatcher) Match(index int, packet *packet.Packet, info scaninf
 		return false
 	}
 
-	severity := string(pg.Severity[1:])
-	if severity != "FATAL" && severity != "ERROR" {
+	length := binary.BigEndian.Uint32(pg.Len[:])
+	if length + 1 != uint32(packet.Len) {
+		return false;
+	}
+
+	data := string(pg.Data[:])
+	splits := strings.Split(data, "\x00")
+
+	var findSeverity bool = false
+	var findErrorCode bool = false
+	for _, s := range splits {
+		if strings.Contains(s, "FATAL") {
+			findSeverity = true;
+		}
+		if strings.Contains(s, "28000") {
+			findErrorCode = true;
+		}
+	}
+
+	if !findSeverity || !findErrorCode {
 		return false
 	}
 
-	if string(pg.Code[1:]) != "28000" {
-		return false
-	}
 
 	return true
 

matcher/pgsql/pgsql_test.go

@@ -11,7 +11,7 @@ import (
 func TestPG(t *testing.T) {
 	m := NewPostgreSQLMatcher()
 
-	conn, err := net.Dial("tcp", "192.168.1.88:5432") //107
+	conn, err := net.Dial("tcp", "192.168.1.106:5432") //107
 	if err != nil {
 		t.Error(err)
 		return