i want to convert a service name to the corresponding port number. Unfortunately with this code I always get IntPtr.Zero from getservbyname and the WSANO_DATA error. What have I done wrong?
internal sealed class ServiceNameToPortConverter
{
public int Convert(string name)
{
// Vorbedingung
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
int result = 0;
int intResult = -1;
if (int.TryParse(name, out intResult))
{
result = System.Convert.ToInt32(name, CultureInfo.InvariantCulture);
}
else
{
WSAData dummy = new WSAData();
int sccuessful = NativeMethods.WSAStartup(0x0202, ref dummy);
if (sccuessful != 0)
{
throw CreateWSAException();
}
IntPtr intPtr = NativeMethods.GetServByName(name, "tcp");
try
{
if (intPtr != IntPtr.Zero)
{
Servent servent = (Servent)Marshal.PtrToStructure(intPtr, typeof(Servent));
result = System.Convert.ToInt32(IPAddress.NetworkToHostOrder(servent.s_port));
}
else
{
throw CreateWSAException();
}
}
finally
{
sccuessful = NativeMethods.WSACleanup();
if (sccuessful != 0)
{
throw CreateWSAException();
}
}
}
return result;
}
private static Win32Exception CreateWSAException()
{
int error = NativeMethods.WSAGetLastError();
return new Win32Exception(error);
}
internal static class NativeMethods
{
[DllImport("Ws2_32.dll", EntryPoint = "getservbyname",
SetLastError = true,
CharSet = CharSet.Auto,
ExactSpelling = false,
CallingConvention = CallingConvention.StdCall,
ThrowOnUnmappableChar = true,
BestFitMapping = false)]
public static extern IntPtr GetServByName(string strName, string strProto);
[DllImport("Ws2_32.dll", CharSet = CharSet.Auto, SetLastError = true, ThrowOnUnmappableChar = true, ExactSpelling = false)]
public static extern Int32 WSAStartup(short wVersionRequested, ref WSAData wsaData);
[DllImport("Ws2_32.dll", CharSet = CharSet.Auto, SetLastError = true, ThrowOnUnmappableChar = true, ExactSpelling = false)]
public static extern Int32 WSACleanup();
[DllImport("Ws2_32.dll", CharSet = CharSet.Auto, SetLastError = true, ThrowOnUnmappableChar = true, ExactSpelling = false)]
public static extern Int32 WSAGetLastError();
}
[StructLayout(LayoutKind.Sequential)]
internal struct Servent
{
[SuppressMessage("Microsoft.Maintainability", "CA1504:ReviewMisleadingFieldNames")]
public string s_name;
[SuppressMessage("Microsoft.Maintainability", "CA1504:ReviewMisleadingFieldNames")]
public IntPtr s_aliases;
[SuppressMessage("Microsoft.Maintainability", "CA1504:ReviewMisleadingFieldNames")]
public short s_port;
[SuppressMessage("Microsoft.Maintainability", "CA1504:ReviewMisleadingFieldNames")]
public string s_proto;
}
[StructLayout(LayoutKind.Sequential)]
public struct WSAData
{
public short version;
public short highVersion;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 257)]
public string description;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 129)]
public string systemStatus;
public short maxSockets;
public short maxUdpDg;
public IntPtr vendorInfo;
}
}
My services file in C:WIndows\system32\drivers\etc
echo 7/tcp
echo 7/udp
discard 9/tcp sink null
discard 9/udp sink null
systat 11/tcp users #Active users
systat 11/udp users #Active users
daytime 13/tcp
daytime 13/udp
qotd 17/tcp quote #Quote of the day
qotd 17/udp quote #Quote of the day
chargen 19/tcp ttytst source #Character generator
chargen 19/udp ttytst source #Character generator
ftp-data 20/tcp #FTP, data
ftp 21/tcp #FTP. control
ssh 22/tcp #SSH Remote Login Protocol
telnet 23/tcp
smtp 25/tcp mail #Simple Mail Transfer Protocol
time 37/tcp timserver
time 37/udp timserver
rlp 39/udp resource #Resource Location Protocol
nameserver 42/tcp name #Host Name Server
nameserver 42/udp name #Host Name Server
nicname 43/tcp whois
domain 53/tcp #Domain Name Server
domain 53/udp #Domain Name Server
bootps 67/udp dhcps #Bootstrap Protocol Server
bootpc 68/udp dhcpc #Bootstrap Protocol Client
tftp 69/udp #Trivial File Transfer
gopher 70/tcp
finger 79/tcp
http 80/tcp www www-http #World Wide Web
hosts2-ns 81/tcp #HOSTS2 Name Server
hosts2-ns 81/udp #HOSTS2 Name Server
kerberos 88/tcp krb5 kerberos-sec #Kerberos
kerberos 88/udp krb5 kerberos-sec #Kerberos
hostname 101/tcp hostnames #NIC Host Name Server
iso-tsap 102/tcp #ISO-TSAP Class 0
rtelnet 107/tcp #Remote Telnet Service
pop2 109/tcp postoffice #Post Office Protocol - Version 2
pop3 110/tcp #Post Office Protocol - Version 3
sunrpc 111/tcp rpcbind portmap #SUN Remote Procedure Call
sunrpc 111/udp rpcbind portmap #SUN Remote Procedure Call
auth 113/tcp ident tap #Identification Protocol
uucp-path 117/tcp
sqlserv 118/tcp #SQL Services
nntp 119/tcp usenet #Network News Transfer Protocol
ntp 123/udp #Network Time Protocol
epmap 135/tcp loc-srv #DCE endpoint resolution
epmap 135/udp loc-srv #DCE endpoint resolution
netbios-ns 137/tcp nbname #NETBIOS Name Service
netbios-ns 137/udp nbname #NETBIOS Name Service
netbios-dgm 138/udp nbdatagram #NETBIOS Datagram Service
netbios-ssn 139/tcp nbsession #NETBIOS Session Service
imap 143/tcp imap4 #Internet Message Access Protocol
sql-net 150/tcp
sqlsrv 156/tcp
pcmail-srv 158/tcp #PCMail Server
snmp 161/udp #SNMP
snmptrap 162/udp snmp-trap #SNMP trap
print-srv 170/tcp #Network PostScript
bgp 179/tcp #Border Gateway Protocol
irc 194/tcp #Internet Relay Chat Protocol
ipx 213/udp #IPX over IP
rtsps 322/tcp
rtsps 322/udp
mftp 349/tcp
mftp 349/udp
ldap 389/tcp #Lightweight Directory Access Protocol
https 443/tcp MCom #HTTP over TLS/SSL
https 443/udp MCom #HTTP over TLS/SSL
microsoft-ds 445/tcp
microsoft-ds 445/udp
kpasswd 464/tcp # Kerberos (v5)
kpasswd 464/udp # Kerberos (v5)
isakmp 500/udp ike #Internet Key Exchange
crs 507/tcp #Content Replication System
crs 507/udp #Content Replication System
exec 512/tcp #Remote Process Execution
biff 512/udp comsat
login 513/tcp #Remote Login
who 513/udp whod
cmd 514/tcp shell
syslog 514/udp
printer 515/tcp spooler
talk 517/udp
ntalk 518/udp
efs 520/tcp #Extended File Name Server
router 520/udp route routed
ulp 522/tcp
ulp 522/udp
timed 525/udp timeserver
tempo 526/tcp newdate
irc-serv 529/tcp
irc-serv 529/udp
courier 530/tcp rpc
conference 531/tcp chat
netnews 532/tcp readnews
netwall 533/udp #For emergency broadcasts
uucp 540/tcp uucpd
klogin 543/tcp #Kerberos login
kshell 544/tcp krcmd #Kerberos remote shell
dhcpv6-client 546/tcp #DHCPv6 Client
dhcpv6-client 546/udp #DHCPv6 Client
dhcpv6-server 547/tcp #DHCPv6 Server
dhcpv6-server 547/udp #DHCPv6 Server
afpovertcp 548/tcp #AFP over TCP
afpovertcp 548/udp #AFP over TCP
new-rwho 550/udp new-who
rtsp 554/tcp #Real Time Stream Control Protocol
rtsp 554/udp #Real Time Stream Control Protocol
remotefs 556/tcp rfs rfs_server
rmonitor 560/udp rmonitord
monitor 561/udp
nntps 563/tcp snntp #NNTP over TLS/SSL
nntps 563/udp snntp #NNTP over TLS/SSL
whoami 565/tcp
whoami 565/udp
ms-shuttle 568/tcp #Microsoft shuttle
ms-shuttle 568/udp #Microsoft shuttle
ms-rome 569/tcp #Microsoft rome
ms-rome 569/udp #Microsoft rome
http-rpc-epmap 593/tcp #HTTP RPC Ep Map
http-rpc-epmap 593/udp #HTTP RPC Ep Map
hmmp-ind 612/tcp #HMMP Indication
hmmp-ind 612/udp #HMMP Indication
hmmp-op 613/tcp #HMMP Operation
hmmp-op 613/udp #HMMP Operation
ldaps 636/tcp sldap #LDAP over TLS/SSL
doom 666/tcp #Doom Id Software
doom 666/udp #Doom Id Software
msexch-routing 691/tcp #MS Exchange Routing
msexch-routing 691/udp #MS Exchange Routing
kerberos-adm 749/tcp #Kerberos administration
kerberos-adm 749/udp #Kerberos administration
kerberos-iv 750/udp #Kerberos version IV
mdbs_daemon 800/tcp
mdbs_daemon 800/udp
ftps-data 989/tcp #FTP data, over TLS/SSL
ftps 990/tcp #FTP control, over TLS/SSL
telnets 992/tcp #Telnet protocol over TLS/SSL
imaps 993/tcp #IMAP4 protocol over TLS/SSL
ircs 994/tcp #IRC protocol over TLS/SSL
pop3s 995/tcp spop3 #pop3 protocol over TLS/SSL (was spop3)
pop3s 995/udp spop3 #pop3 protocol over TLS/SSL (was spop3)
kpop 1109/tcp #Kerberos POP
nfsd-status 1110/tcp #Cluster status info
nfsd-keepalive 1110/udp #Client status info
nfa 1155/tcp #Network File Access
nfa 1155/udp #Network File Access
activesync 1034/tcp #ActiveSync Notifications
phone 1167/udp #Conference calling
opsmgr 1270/tcp #Microsoft Operations Manager
opsmgr 1270/udp #Microsoft Operations Manager
ms-sql-s 1433/tcp #Microsoft-SQL-Server
ms-sql-s 1433/udp #Microsoft-SQL-Server
ms-sql-m 1434/tcp #Microsoft-SQL-Monitor
ms-sql-m 1434/udp #Microsoft-SQL-Monitor
ms-sna-server 1477/tcp
ms-sna-server 1477/udp
ms-sna-base 1478/tcp
ms-sna-base 1478/udp
wins 1512/tcp #Microsoft Windows Internet Name Service
wins 1512/udp #Microsoft Windows Internet Name Service
ingreslock 1524/tcp ingres
stt 1607/tcp
stt 1607/udp
l2tp 1701/udp #Layer Two Tunneling Protocol
pptconference 1711/tcp
pptconference 1711/udp
pptp 1723/tcp #Point-to-point tunnelling protocol
msiccp 1731/tcp
msiccp 1731/udp
remote-winsock 1745/tcp
remote-winsock 1745/udp
ms-streaming 1755/tcp
ms-streaming 1755/udp
msmq 1801/tcp #Microsoft Message Queue
msmq 1801/udp #Microsoft Message Queue
radius 1812/udp #RADIUS authentication protocol
radacct 1813/udp #RADIUS accounting protocol
msnp 1863/tcp
msnp 1863/udp
ssdp 1900/tcp
ssdp 1900/udp
close-combat 1944/tcp
close-combat 1944/udp
nfsd 2049/udp nfs #NFS server
knetd 2053/tcp #Kerberos de-multiplexor
mzap 2106/tcp #Multicast-Scope Zone Announcement Protocol
mzap 2106/udp #Multicast-Scope Zone Announcement Protocol
qwave 2177/tcp #QWAVE
qwave 2177/udp #QWAVE Experiment Port
directplay 2234/tcp #DirectPlay
directplay 2234/udp #DirectPlay
ms-olap3 2382/tcp #Microsoft OLAP 3
ms-olap3 2382/udp #Microsoft OLAP 3
ms-olap4 2383/tcp #Microsoft OLAP 4
ms-olap4 2383/udp #Microsoft OLAP 4
ms-olap1 2393/tcp #Microsoft OLAP 1
ms-olap1 2393/udp #Microsoft OLAP 1
ms-olap2 2394/tcp #Microsoft OLAP 2
ms-olap2 2394/udp #Microsoft OLAP 2
ms-theater 2460/tcp
ms-theater 2460/udp
wlbs 2504/tcp #Microsoft Windows Load Balancing Server
wlbs 2504/udp #Microsoft Windows Load Balancing Server
ms-v-worlds 2525/tcp #Microsoft V-Worlds
ms-v-worlds 2525/udp #Microsoft V-Worlds
sms-rcinfo 2701/tcp #SMS RCINFO
sms-rcinfo 2701/udp #SMS RCINFO
sms-xfer 2702/tcp #SMS XFER
sms-xfer 2702/udp #SMS XFER
sms-chat 2703/tcp #SMS CHAT
sms-chat 2703/udp #SMS CHAT
sms-remctrl 2704/tcp #SMS REMCTRL
sms-remctrl 2704/udp #SMS REMCTRL
msolap-ptp2 2725/tcp #MSOLAP PTP2
msolap-ptp2 2725/udp #MSOLAP PTP2
icslap 2869/tcp
icslap 2869/udp
cifs 3020/tcp
cifs 3020/udp
xbox 3074/tcp #Microsoft Xbox game port
xbox 3074/udp #Microsoft Xbox game port
ms-dotnetster 3126/tcp #Microsoft .NET ster port
ms-dotnetster 3126/udp #Microsoft .NET ster port
ms-rule-engine 3132/tcp #Microsoft Business Rule Engine Update Service
ms-rule-engine 3132/udp #Microsoft Business Rule Engine Update Service
msft-gc 3268/tcp #Microsoft Global Catalog
msft-gc 3268/udp #Microsoft Global Catalog
msft-gc-ssl 3269/tcp #Microsoft Global Catalog with LDAP/SSL
msft-gc-ssl 3269/udp #Microsoft Global Catalog with LDAP/SSL
ms-cluster-net 3343/tcp #Microsoft Cluster Net
ms-cluster-net 3343/udp #Microsoft Cluster Net
ms-wbt-server 3389/tcp #MS WBT Server
ms-wbt-server 3389/udp #MS WBT Server
ms-la 3535/tcp #Microsoft Class Server
ms-la 3535/udp #Microsoft Class Server
pnrp-port 3540/tcp #PNRP User Port
pnrp-port 3540/udp #PNRP User Port
teredo 3544/tcp #Teredo Port
teredo 3544/udp #Teredo Port
p2pgroup 3587/tcp #Peer to Peer Grouping
p2pgroup 3587/udp #Peer to Peer Grouping
ws-discovery 3702/udp #WS-Discovery
ws-discovery 3702/tcp #WS-Discovery
dvcprov-port 3776/tcp #Device Provisioning Port
dvcprov-port 3776/udp #Device Provisioning Port
msfw-control 3847/tcp #Microsoft Firewall Control
msdts1 3882/tcp #DTS Service Port
sdp-portmapper 3935/tcp #SDP Port Mapper Protocol
sdp-portmapper 3935/udp #SDP Port Mapper Protocol
net-device 4350/tcp #Net Device
net-device 4350/udp #Net Device
ipsec-msft 4500/tcp #Microsoft IPsec NAT-T
ipsec-msft 4500/udp #Microsoft IPsec NAT-T
llmnr 5355/tcp #LLMNR
llmnr 5355/udp #LLMNR
wsd 5357/tcp #Web Services on devices
wsd 5358/tcp #Web Services on devices
rrac 5678/tcp #Remote Replication Agent Connection
rrac 5678/udp #Remote Replication Agent Connection
dccm 5679/tcp #Direct Cable Connect Manager
dccm 5679/udp #Direct Cable Connect Manager
ms-licensing 5720/tcp #Microsoft Licensing
ms-licensing 5720/udp #Microsoft Licensing
directplay8 6073/tcp #DirectPlay8
directplay8 6073/udp #DirectPlay8
man 9535/tcp #Remote Man Server
rasadv 9753/tcp
rasadv 9753/udp
imip-channels 11320/tcp #IMIP Channels Port
imip-channels 11320/udp #IMIP Channels Port
directplaysrvr 47624/tcp #Direct Play Server
directplaysrvr 47624/udp #Direct Play Server
ods 3472/tcp #informix
ods_test 3474/tcp #informix testsrv
info-aps 6400/tcp #
OS: Windows 7 x86
