mission: generate sequential mode 3 iff code to assignees

src/dct/ai/Mission.lua

@@ -185,6 +185,8 @@ function Mission:__init(cmdr, missiontype, tgt, plan)
 	self:_setComplete(false)
 	self.state = PrepState()
 	self.state:enter(self)
+	self._assignedIds = {}
+	self._lastAssignedId = 0
 
 	-- compose the briefing at mission creation to represent
 	-- known intel the pilots were given before departing
@@ -223,6 +225,10 @@ function Mission:addAssigned(asset)
 		return
 	end
 	table.insert(self.assigned, asset.name)
+	if self._assignedIds[asset.name] == nil then
+		self._assignedIds[asset.name] = self._lastAssignedId
+		self._lastAssignedId = self._lastAssignedId + 1
+	end
 	Logger:debug("Mission %d: addAssigned(%s)", self.id, asset.name)
 	asset.missionid = self:getID()
 end
@@ -331,6 +337,16 @@ function Mission:addTime(time)
 	return time
 end
 
+function Mission:getIFFCodes(asset)
+	local assignedId = 0
+	if asset ~= nil then
+		assignedId = (self._assignedIds[asset.name] or 0) % 8
+	end
+	local m1 = string.format("%o", self.iffcodes.m1)
+	local m3 = string.format("%o", self.iffcodes.m3 + assignedId)
+	return { ["m1"] = m1, ["m3"] = m3 }
+end
+
 function Mission:getDescription(fmt)
 	local tgt = self.cmdr:getAsset(self.target)
 	if tgt == nil then

src/dct/ui/cmds.lua

@@ -194,9 +194,9 @@ end
 
 local function briefingmsg(msn, asset)
 	local tgtinfo = msn:getTargetInfo()
+	local iff = msn:getIFFCodes(asset)
 	local msg = string.format("Package: #%s\n", msn:getID())..
-		string.format("IFF Codes: M1(%02o), M3(%04o)\n",
-			msn.iffcodes.m1, msn.iffcodes.m3)..
+		string.format("IFF Codes: M1(%s), M3(%s)\n", iff.m1, iff.m3)..
 		string.format("%s: %s (%s)\n",
 			human.locationhdr(msn.type),
 			dctutils.fmtposition(