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Some time the system IPL STRTCP process slower than system startup
program, so when I start socket program, I got some socket error TCP
is not active or interface inactive and I browsed the QSYSOPR log list
my socket program retry message before the Job nnnnnn/QTCP/QTCPIP
started.
I don't know why the IPL STRTCP process slower than the qstruppgm. The
error is not often occurred. But I need more detail error message for
the TCP/IP checking, Finally I write the CHKTCPIFC command to check
the TCP/IP and Interface status with API QtocRtvTCPA, QtocLstNetIfc.
The source code:
File : QCLSRC
Member :CHKTCPIFC
Type :CLLE
Usage : CRTBNDCL PGM(lib/CHKTCPIFC) SRCFILE(lib/QCLSRC) MBR(CHKTCPIFC)
/* =============================================================== */
/* = Command ChkTcpIfc CPP = */
/* = ChkTcpIfc CLLE = */
/* = Paramater notes: = */
/* = NetIfc :Network interface address = */
/* = = */
/* = For V5R1 and later use = */
/* = = */
/* = Usage in CLP: = */
/* = ChkTcpIfc NETIFC( ip_address ) = */
/* = MONMSG CPF9898 => Possible error as following: = */
/* = 1. TCP/IP is not active. = */
/* = 2. Interface address is not active. = */
/* = 3. Interface address is not defined. = */
/* =============================================================== */
/* = Date : 2007/06/26 = */
/* = Author: Vengoal Chang = */
/* =============================================================== */
/* =============================================================== */
/* = End of program = */
/* =============================================================== */
ENDPGM
File : QCMDSRC
Member: CHKTCPIFC
Type : CMD
/* =============================================================== */
/* = Command....... ChkTcpIfc = */
/* = CPP........... ChkTcpIfc = */
/* = Description... Check TCP/IP Interface Status = */
/* = = */
/* = CrtCmd Cmd( ChkTcpIfc ) = */
/* = Pgm( ChkTcpIfc ) = */
/* = SrcFile( YourSourceFile ) = */
/* = = */
/* = For V5R1 and later use = */
/* = = */
/* = Usage in CLP: = */
/* = ChkTcpIfc NETIFC( ip_address ) = */
/* = MONMSG CPF9898 => Possible error as following: = */
/* = 1. TCP/IP is not active. = */
/* = 2. Interface address is not active. = */
/* = 3. Interface address is not defined. = */
/* =============================================================== */
/* = Date : 2007/06/26 = */
/* = Author: Vengoal Chang = */
/* =============================================================== */
CMD PROMPT('Check TCP/IP Interface Status')
for example: IP 192.16.15.27 is not defined on AS/400.
IP 192.16.15.28 is on AS/400 and Active.
You can use command CFGTCP select option 1 Work with TCP/IP interfaces
to get detail interface information.
PGM
DCL VAR(&NETIFC) TYPE(*CHAR) LEN(15)
CHGVAR VAR(&NETIFC) VALUE('192.16.15.27')
CHKTCPIFC NETIFC(&NETIFC)
MONMSG CPF9898 EXEC(DO)
SNDPGMMSG MSG('Interface' *BCAT &NETIFC *BCAT 'is not +
active or defined')
ENDDO
CHKTCPIFC NETIFC('192.16.15.28')
ENDPGM
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