public void ProcessOSPFDatabase()
{
#region Query, parse and store LSAs
string ospfOverView = _router.Session.ExecCommand("show ip ospf");
string ospfAreaRouters = _router.Session.ExecCommand("show ip ospf database");
string[] lines = ospfAreaRouters.SplitByLine();
OSPFArea currentArea = null;
string currentLSATypeName = "";
List <OSPFLSA> LSAs = new List <OSPFLSA>();
Dictionary <string, List <OSPFLSA> > OSPFLSAs = new Dictionary <string, List <OSPFLSA> >();
foreach (string line in lines.Where(l => l != "").Select(l => l.Trim()))
{
try
{
if (line.ToLowerInvariant().Contains("link states (area "))
{
string AreaName = Regex.Match(line, @"(?<=\().*?(?=\))")?.Value;
string thisAreaID = Regex.Match(AreaName, @"(?<=Area )[\d.]{0,99}")?.Value;
string thisLSATypeName = Regex.Match(line.ToLowerInvariant(), @"^.*(?=(link))")?.Value;
// line is like : Router Link States (Area 172.20.0.0)
if (currentArea == null)
{
currentArea = new OSPFArea();
currentArea.AreaID = thisAreaID.Trim();
currentArea.AreaType = GetAreaType(currentArea.AreaID);
}
else if (thisAreaID != currentArea.AreaID)
{
// area ID is changing
this._ospfAreaLSAs[currentArea] = OSPFLSAs;
OSPFLSAs = new Dictionary <string, List <OSPFLSA> >();
currentArea = new OSPFArea();
currentArea.AreaID = thisAreaID.Trim();
currentArea.AreaType = GetAreaType(currentArea.AreaID);
}
//--
if (currentLSATypeName == "")
{
currentLSATypeName = thisLSATypeName.Trim();
}
else if (currentLSATypeName != thisLSATypeName)
{
// LSA Type is changing
OSPFLSAs.Add(currentLSATypeName, LSAs);
LSAs = new List <OSPFLSA>();
currentLSATypeName = thisLSATypeName.Trim();
}
}
else if (line.ToLowerInvariant().Contains("link states"))
{
// line is like : Type-5 AS External Link States
// area is not changing, only the LSA Type
string thisLSATypeName = Regex.Match(line.ToLowerInvariant(), @"^.*(?=(link))")?.Value;
if (currentLSATypeName != "" && currentLSATypeName != thisLSATypeName)
{
// LSA Type is changing
OSPFLSAs.Add(currentLSATypeName, LSAs);
currentLSATypeName = thisLSATypeName;
}
LSAs = new List <OSPFLSA>();
}
else
{
string[] r = line.ToLowerInvariant().SplitBySpace();
string firstWord = r[0].Trim();
//if first word is ip address, then this is an LSA entry
if (IPAddress.TryParse(firstWord, out IPAddress testIP))
{
// header : Link ID ADV Router Age Seq# Checksum Link count
// line is like :100.65.0.46 100.65.0.46 238 0x8000EBC3 0x00D97D 1
string LSAID = firstWord;
// The Adv Router should be the second word in thisLine
string AdvRouter = r[1].Trim();
OSPFLSA thisLSA = new OSPFLSA()
{
LSAType = currentLSATypeName, LSAID = LSAID, AdvRouter = AdvRouter
};
LSAs.Add(thisLSA);
}
}
}
catch (Exception Ex)
{
DebugEx.WriteLine("Cisco IOS OSPF Protocol Parser : unable to parse OSPF database line :" + line, DebugLevel.Warning);
}
}
// add the last area router ID-s
if (currentArea != null)
{
this._ospfAreaLSAs[currentArea] = OSPFLSAs;
}
#endregion
#region Local functions
OSPFAreaType GetAreaType(string AreaID)
{
try
{
if (AreaID == "0.0.0.0")
{
return(OSPFAreaType.Backbone);
}
bool scanningAreaBlock = false;
List <string> areaBlok = new List <string>();
foreach (string line in ospfOverView.SplitByLine().Select(l => l.ToLowerInvariant().Trim()))
{
if (line.StartsWith(string.Format("area {0}", AreaID)))
{
if (scanningAreaBlock)
{
break;
}
scanningAreaBlock = true;
continue;
}
if (scanningAreaBlock)
{
areaBlok.Add(line);
}
}
if (areaBlok.Any(l => l.Contains("nssa")))
{
return(OSPFAreaType.NSSA);
}
if (areaBlok.Any(l => l.Contains("stub")))
{
return(OSPFAreaType.Stub);
}
if (areaBlok.Any(l => l.Contains("totally")))
{
return(OSPFAreaType.TotallyStub);
}
return(OSPFAreaType.Normal);
}
catch (Exception Ex)
{
DebugEx.WriteLine("Cisco_IOS_OSPFParser.ProcessOSPFDatabase.GetAreaType() : unexpected error : " + Ex.Message);
return(OSPFAreaType.Unknown);
}
}
#endregion
}
public void ProcessOSPFDatabase()
{
if (_router?.Session == null || !_router.Session.IsConnected())
{
throw new ArgumentException("Unable to parse OSPF. Either thisRouter or Session parameter is invalid");
}
#region Query, parse and store LSAs
string ospfOverView = _router.Session.ExecCommand("show ospf overview");
string ospfAreaRouters = _router.Session.ExecCommand("show ospf database");
string[] lines = ospfAreaRouters.SplitByLine();
OSPFArea currentArea = null;
string currentLSATypaName = "";
List <OSPFLSA> LSAs = new List <OSPFLSA>();
Dictionary <string, List <OSPFLSA> > OSPFLSAs = new Dictionary <string, List <OSPFLSA> >();
foreach (string line in lines.Select(l => l.Trim()))
{
// header : Type ID Adv Rtr Seq Age Opt Cksum Len
// line is like :Router 10.93.1.200 10.93.1.200 0x800005af 1113 0x8 0x6280 60
try
{
if (line.StartsWith("{master:"))
{
continue;
}
if (line.ToLowerInvariant().StartsWith("ospf database"))
{
// line is like : OSPF database, Area 10.72.0.0
string[] o = line.SplitByComma();
string[] a = o[1].SplitBySpace();
string thisAreaID = a[1];
if (currentArea == null)
{
currentArea = new OSPFArea();
currentArea.AreaID = thisAreaID.Trim();
currentArea.AreaType = GetAreaType(currentArea.AreaID);
}
else if (thisAreaID != currentArea.AreaID)
{
// area ID is changing
this._ospfAreaLSAs[currentArea] = OSPFLSAs;
OSPFLSAs = new Dictionary <string, List <OSPFLSA> >();
LSAs = new List <OSPFLSA>();
currentArea = new OSPFArea();
currentArea.AreaID = thisAreaID.Trim();
currentArea.AreaType = GetAreaType(currentArea.AreaID);
}
}
else
{
// The LSA Type should be the first word in thisLine
string[] r = line.ToLowerInvariant().SplitBySpace();
string LSATypeName = r[0];
if (LSATypeName != "type")
{
if (LSATypeName != currentLSATypaName)
{
// LSAType is changing
if (currentLSATypaName != "")
{
OSPFLSAs[currentLSATypaName] = LSAs;
LSAs = new List <OSPFLSA>();
}
currentLSATypaName = LSATypeName;
}
string LSAID = r[1].TrimStart('*');
string AdvRouter = r[1].Trim();
OSPFLSA thisLSA = new OSPFLSA()
{
LSAType = currentLSATypaName, LSAID = LSAID, AdvRouter = AdvRouter
};
LSAs.Add(thisLSA);
}
}
}
catch (Exception Ex)
{
DebugEx.WriteLine("JunOS IRouter : unable to parse OSPF database line :" + line);
}
}
// add the last area router ID-s
if (currentArea != null)
{
this._ospfAreaLSAs[currentArea] = OSPFLSAs;
}
#endregion
#region Local functions
OSPFAreaType GetAreaType(string AreaID)
{
try
{
// parsing as per https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-ospf-ospf3-overview.html
if (AreaID == "0.0.0.0")
{
return(OSPFAreaType.Backbone);
}
bool inDesiredAreaSection = false;
foreach (string line in ospfOverView.SplitByLine().Select(l => l.ToLowerInvariant().Trim()))
{
if (line.StartsWith(string.Format("area: {0}", AreaID)))
{
if (inDesiredAreaSection)
{
break;
}
inDesiredAreaSection = true;
}
if (inDesiredAreaSection)
{
if (line.StartsWith("stub type:"))
{
string[] typeDesc = line.Split(':');
if (typeDesc[1].Contains("normal stub"))
{
return(OSPFAreaType.Stub);
}
if (typeDesc[1].Contains("not stub"))
{
return(OSPFAreaType.Normal);
}
if (typeDesc[1].Contains("not so stubby") || typeDesc[1].Contains("nssa"))
{
return(OSPFAreaType.NSSA);
}
}
}
}
return(OSPFAreaType.Unknown);
}
catch (Exception Ex)
{
DebugEx.WriteLine("JUNOS_OSPFParser.ProcessOSPFDatabase.GetAreaType() : unexpected error : " + Ex.Message);
return(OSPFAreaType.Unknown);
}
#endregion
}
}
