GSM: Implement handling the GSM Alerting messages..

GSM48.st

@@ -643,6 +643,8 @@ IEMessage subclass: GSM48MSG [
         "TODO: Complain if we have not consumed everything"
         dat size = 0
             ifFalse: [
+                res inspect.
+                dat printNl.
                 self error: 'Every byte should be consumed'.
         ].
 
@@ -724,6 +726,7 @@ GSM48MSG subclass: GSM48CCMessage [
 
     GSM48CCMessage class >> classType [ ^ 16r3 ]
 
+    GSM48CCMessage class >> msgAlerting   [ ^ 16r1 ]
     GSM48CCMessage class >> msgProceeding [ ^ 16r2 ]
     GSM48CCMessage class >> msgSetup      [ ^ 16r5 ]
 
@@ -1000,6 +1003,30 @@ GSM48CCMessage subclass: GSM48CCProceeding [
     ]
 ]
 
+GSM48CCMessage subclass: GSM48CCAlerting [
+    <category: 'osmo-message'>
+    Mandantory := nil.
+    Optional := nil.
+
+    GSM48CCAlerting class >> messageType [ ^ self msgAlerting ]
+    GSM48CCAlerting class >> Mandantory [
+        ^ Mandantory ifNil: [ Mandantory := OrderedCollection new ]
+    ]
+
+    GSM48CCAlerting class >> Optional [
+        ^ Optional ifNil: [ Optional := OrderedCollection new ]
+    ]
+
+    GSM48CCAlerting class >> initialize [
+        self addOptional: 'facility' with: GSMFacility.
+        self addOptional: 'progress' with: GSMProgress.
+        self addOptional: 'useruser' with: GSMUserUser.
+
+        "mobile station to network"
+        self addOptional: 'ssVersion' with: GSMSSVersionInd.
+    ]
+]
+
 Eval [
     GSM48LURequest initialize.
     GSM48LUReject initialize.
@@ -1013,4 +1040,5 @@ Eval [
 
     GSM48CCSetup initialize.
     GSM48CCProceeding initialize.
+    GSM48CCAlerting initialize.
 ]

Tests.st

@@ -354,5 +354,10 @@ TestCase subclass: TestMessages [
         inp := #(6 0 0 72 0 1 5 1 0 2 131 2) asByteArray.
         msg := MSGParser parse: inp.
         self assert: msg toMessage asByteArray = inp.
+
+        "Alerting"
+        inp := #(6 0 0 72 0 1 9 1 0 6 131 1 30 2 234 129) asByteArray.
+        msg := MSGParser parse: inp.
+        self assert: msg toMessage asByteArray = inp.
     ]
 ]