Format of the callout control data in the message
The format of the callout control data in the output message that is sent to the client application depends on the type of client application that issues the resume tpipe request.
For non-IMS TM resource adapter clients
The output message that is sent by IMS Connect to the client application includes a structure that contains control data. This structure can be mapped by using the CTLDATA and CTLDATASEG DSECTs, which are included in the macro HWSIMSCB. The control data structure is placed before the callout request data.
The format of the control data structure is as follows:
| Field | Length | Meaning |
|---|---|---|
| CTL_LLLL | 4 bytes | Length of control data structure |
| CTL_ID | 8 bytes | Control data structure ID, which is a character value of *CTLDAT* |
| zzzz | 4 bytes | Reserved for IMS Connect |
| CTL_HDRLEN1 | 4 bytes | Length of the header (tag) of the first control data section. This field is followed by the first pair of open and close tags. |
| CTL_DATA1 | d1 | The first control data section, which
is in the following format:<tag1>data1</tag1> |
| CTL_HDRLEN2 | 4 bytes | Length of the header (tag) of the second control data section. This field is followed by the second pair of open and close tags. |
| CTL_DATA2 | d2 | The second control data
section, which is in the following format:<tag2>data2</tag2> |
| : | : | : |
| CTL_HDRLENn | 4 bytes | Length of the header (tag) of the last control data section. This field is followed by the last pair of open and close tags. |
| CTL_DATAn | dn | The last control data section,
which is in the following format:<tagn>datan</tagn> |
For IMS TM resource adapter clients
The format of the control data structure is as follows:
| Field | Length | Meaning |
|---|---|---|
| LLLL | 4 bytes | Length of control data structure |
| LLLL | 4 bytes | Length of the header (tag) of the first control data section. This field is followed by the first pair of open and close tags. |
| DATA | d1 | The first control data section, which
is in the following format: <tag1>data1</tag1> |
| LLLL | 4 bytes | Length of the header (tag) of the second control data section. This field is followed by the second pair of open and close tags. |
| DATA | d2 | The second control data
section, which is in the following format: <tag2>data2</tag2> |
| : | : | : |
| LLLL | 4 bytes | Length of the header (tag) of the last control data section. This field is followed by the last pair of open and close tags. |
| DATA | dn | The last control data section,
which is in the following format: <tagn>datan</tagn> |