Test creating SCCP CR messages

SCCP.st

@@ -21,8 +21,14 @@ Object subclass: SCCPHelper [
     SCCPHelper class >> msgLudt [ ^ 16r13 ]
     SCCPHelper class >> msgLudts[ ^ 16r14 ]
 
+    SCCPHelper class >> pncData [ ^ 16r0F ]
     SCCPHelper class >> pncEoO  [ ^ 16r00 ]
 
+    SCCPHelper class >> createCR: src dest: dest data: aData [
+        ^ (SCCPConnectionRequest initWith: src dest: dest data: aData)
+            toMessage.
+    ]
+
     SCCPHelper class >> createRLSD: src dest: dest cause: cause [
         ^ (SCCPConnectionReleased initWith: src dest: dest cause: cause)
             toMessage.
@@ -34,6 +40,35 @@ Object subclass: SCCPHelper [
     ]
 ]
 
+Object subclass: SCCPAddress [
+    | ssn |
+
+    SCCPAddress class >> createWith: ssn [
+        ^ (SCCPAddress new)
+            ssn: ssn;
+            yourself
+    ]
+
+    ssn: assn [
+        ssn := assn
+    ]
+
+    asByteArray [
+        "Most simple address storing routine"
+        | ai data |
+
+        data := OrderedCollection new.
+        ai := 0.
+        ai := ai bitOr: 2.
+        ai := ai bitOr: 64.
+        data add: ai.
+        data add: ssn.
+        data addFirst: data size.
+
+        ^ data asByteArray
+    ]
+]
+
 Object subclass: SCCPAddrReference [
     <category: 'osmo-network'>
     SCCPAddrReference class >> store: anAddress on: aMsg [
@@ -56,6 +91,50 @@ Object subclass: SCCPAddrReference [
     ]
 ]
 
+Object subclass: SCCPConnectionRequest [
+    <category: 'osmo-network'>
+    | src dst data |
+
+    SCCPConnectionRequest class >> initWith: src dest: dest data: data [
+        <category: 'construction'>
+
+        ^ self new
+            src: src dest: dest data: data;
+            yourself
+    ]
+
+    src: aSrc dest: aDest data: aData [
+        src := aSrc.
+        dst := aDest.
+        data := aData.
+    ]
+
+    toMessage [
+        <category: 'conversion'>
+        | msg len addr |
+
+        addr := dst asByteArray.
+
+        msg := MessageBuffer new.
+        msg putByte: SCCPHelper msgCr.
+        SCCPAddrReference store: src on: msg.
+        "store proto_class, variable_called, optional_start"
+        msg putByte: 2.
+        msg putByte: 2.
+        msg putByte: 1 + addr size.
+
+        msg putByteArray: addr.
+
+        " place the data now "
+        msg putByte: SCCPHelper pncData.
+        msg putByte: data size.
+        msg putByteArray: data.
+        msg putByte: SCCPHelper pncEoO.
+
+        ^ msg.
+    ]
+]
+
 Object subclass: SCCPConnectionReleased [
     <category: 'osmo-network'>
     | src dst cause |

Tests.st

@@ -21,6 +21,18 @@ TestCase subclass: SCCPTests [
 
         self assert: msg = #(6 1 4 0 0 1 4 49 50 51 52) asByteArray.
     ]
+
+    testCR [
+        | cr msg |
+        cr := SCCPConnectionRequest
+                    initWith: 16r0300BF
+                    dest: (SCCPAddress createWith: 254)
+                    data: '1234' asByteArray.
+        msg := cr toMessage toByteArray.
+        msg printNl.
+
+        self assert: msg = #(1 191 0 3 2 2 4 2 66 254 15 4 49 50 51 52 0) asByteArray
+    ]
 ]
 
 TestCase subclass: IPATests [