diff --git a/activedirectory/activedirectory.go b/activedirectory/activedirectory.go
index 8185ebc..cf7837a 100644
--- a/activedirectory/activedirectory.go
+++ b/activedirectory/activedirectory.go
@@ -181,7 +181,7 @@ func (m *ActiveDirectoryMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "ActiveDirectory"
 }
 
-func (m *ActiveDirectoryMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *ActiveDirectoryMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/cassandra/cassandra.go b/cassandra/cassandra.go
index 6ab35f8..485f1cf 100644
--- a/cassandra/cassandra.go
+++ b/cassandra/cassandra.go
@@ -27,7 +27,7 @@ func (m *CassandraMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "Cassandra"
 }
 
-func (m *CassandraMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *CassandraMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/dns/dns.go b/dns/dns.go
index 4843992..c6578c4 100644
--- a/dns/dns.go
+++ b/dns/dns.go
@@ -49,7 +49,7 @@ func (m *DNSMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "DNS"
 }
 
-func (m *DNSMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *DNSMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/elasticsearch/elasticsearch.go b/elasticsearch/elasticsearch.go
index fb3509a..60241c9 100644
--- a/elasticsearch/elasticsearch.go
+++ b/elasticsearch/elasticsearch.go
@@ -25,7 +25,7 @@ func (m *ElasticSearchMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return name
 }
 
-func (m *ElasticSearchMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *ElasticSearchMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/ftp/ftp.go b/ftp/ftp.go
index a2b4ac1..364ac6b 100644
--- a/ftp/ftp.go
+++ b/ftp/ftp.go
@@ -37,7 +37,7 @@ func (m *FTPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "FTP"
 }
 
-func (m *FTPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *FTPMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/http/http.go b/http/http.go
index 2f19975..a4c97c8 100644
--- a/http/http.go
+++ b/http/http.go
@@ -22,7 +22,7 @@ func (m *HTTPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return name
 }
 
-func (m *HTTPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *HTTPMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/imap/imap.go b/imap/imap.go
index 443cfe1..48df72a 100644
--- a/imap/imap.go
+++ b/imap/imap.go
@@ -21,7 +21,7 @@ func (m *IMAPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "IMAP"
 }
 
-func (m *IMAPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *IMAPMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/ldap/ldap.go b/ldap/ldap.go
index 86da204..c270eb8 100644
--- a/ldap/ldap.go
+++ b/ldap/ldap.go
@@ -26,7 +26,7 @@ func (m *LDAPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "LDAP"
 }
 
-func (m *LDAPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *LDAPMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/lpd/lpd.go b/lpd/lpd.go
index b3024d0..f18792c 100644
--- a/lpd/lpd.go
+++ b/lpd/lpd.go
@@ -16,7 +16,7 @@ func (m *LPDMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "LPD (Printer)"
 }
 
-func (m *LPDMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *LPDMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/matcher.go b/matcher.go
index 653da63..aa3dae7 100644
--- a/matcher.go
+++ b/matcher.go
@@ -6,7 +6,7 @@ type Matcher interface {
 	Key() string
 	Name(matchCtx *MatchCtx) string
 
-	IsPrePacket(matchCtx *MatchCtx) bool
+	IsPrePacket() bool
 	PacketCount(matchCtx *MatchCtx) int
 	Packet(matchCtx *MatchCtx, index int) *Packet
 	HasResponse(matchCtx *MatchCtx, index int) bool
diff --git a/mongodb/mongodb.go b/mongodb/mongodb.go
index 9689231..5870b8b 100644
--- a/mongodb/mongodb.go
+++ b/mongodb/mongodb.go
@@ -58,7 +58,7 @@ func (m *MongoDBMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "MongoDB"
 }
 
-func (m *MongoDBMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *MongoDBMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/mysql/mysql.go b/mysql/mysql.go
index bb76a18..4fdebf2 100644
--- a/mysql/mysql.go
+++ b/mysql/mysql.go
@@ -28,7 +28,7 @@ func (m *MySqlMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return name
 }
 
-func (m *MySqlMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *MySqlMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/nbss/nbss.go b/nbss/nbss.go
index c5d0b04..de8f5f8 100644
--- a/nbss/nbss.go
+++ b/nbss/nbss.go
@@ -37,7 +37,7 @@ func (m *NBSSMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "NBSS"
 }
 
-func (m *NBSSMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *NBSSMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/oracle/oracle.go b/oracle/oracle.go
index 6140e7c..c8a81e9 100644
--- a/oracle/oracle.go
+++ b/oracle/oracle.go
@@ -18,7 +18,7 @@ func (m *OracleMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "Oracle"
 }
 
-func (m *OracleMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *OracleMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/pop/pop.go b/pop/pop.go
index 83f122a..1b18864 100644
--- a/pop/pop.go
+++ b/pop/pop.go
@@ -20,7 +20,7 @@ func (m *POPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "POP3"
 }
 
-func (m *POPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *POPMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/postgresql/postgresql.go b/postgresql/postgresql.go
index e2b0cff..1c6b82c 100644
--- a/postgresql/postgresql.go
+++ b/postgresql/postgresql.go
@@ -49,7 +49,7 @@ func (m *PostgreSQLMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "PostgreSQL"
 }
 
-func (m *PostgreSQLMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *PostgreSQLMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/redis/redis.go b/redis/redis.go
index 7f9147d..4719c65 100644
--- a/redis/redis.go
+++ b/redis/redis.go
@@ -37,7 +37,7 @@ func (m *RedisMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return name
 }
 
-func (m *RedisMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *RedisMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/rmi/rmi.go b/rmi/rmi.go
index 3fb0aff..ddef85b 100644
--- a/rmi/rmi.go
+++ b/rmi/rmi.go
@@ -39,7 +39,7 @@ func (m *RMIMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "RMI"
 }
 
-func (m *RMIMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *RMIMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/smb/smb.go b/smb/smb.go
index 5351402..a1be8e6 100644
--- a/smb/smb.go
+++ b/smb/smb.go
@@ -60,7 +60,7 @@ func (m *SMBMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "SMB"
 }
 
-func (m *SMBMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *SMBMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/smtp/smtp.go b/smtp/smtp.go
index ac996a9..d649331 100644
--- a/smtp/smtp.go
+++ b/smtp/smtp.go
@@ -18,7 +18,7 @@ func (m *SmtpMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "SMTP"
 }
 
-func (m *SmtpMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *SmtpMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/snmp/v2/snmpv2.go b/snmp/v2/snmpv2.go
index e1927c6..8b20485 100644
--- a/snmp/v2/snmpv2.go
+++ b/snmp/v2/snmpv2.go
@@ -51,7 +51,7 @@ func (s *SNMPMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "SNMP"
 }
 
-func (s *SNMPMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (s *SNMPMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/sqlserver/sqlserver.go b/sqlserver/sqlserver.go
index e2b0d2b..7a98439 100644
--- a/sqlserver/sqlserver.go
+++ b/sqlserver/sqlserver.go
@@ -79,7 +79,7 @@ func (m *SQLServerMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "SQL Server"
 }
 
-func (m *SQLServerMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *SQLServerMatcher) IsPrePacket() bool {
 	return false
 }
 
diff --git a/ssh/ssh.go b/ssh/ssh.go
index 5780c02..a8e66f0 100644
--- a/ssh/ssh.go
+++ b/ssh/ssh.go
@@ -24,7 +24,7 @@ func (m *SSHMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return name
 }
 
-func (m *SSHMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *SSHMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/telnet/telnet.go b/telnet/telnet.go
index 7e132a5..36397a2 100644
--- a/telnet/telnet.go
+++ b/telnet/telnet.go
@@ -24,7 +24,7 @@ func (m *TelnetMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "Telnet"
 }
 
-func (m *TelnetMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *TelnetMatcher) IsPrePacket() bool {
 	return true
 }
 
diff --git a/wmi/wmi.go b/wmi/wmi.go
index 3db2a47..ab1e921 100644
--- a/wmi/wmi.go
+++ b/wmi/wmi.go
@@ -29,7 +29,7 @@ func (m *WMIMatcher) Name(matchCtx *osm.MatchCtx) string {
 	return "WMI"
 }
 
-func (m *WMIMatcher) IsPrePacket(matchCtx *osm.MatchCtx) bool {
+func (m *WMIMatcher) IsPrePacket() bool {
 	return false
 }