private void CreateChains(IpTablesDetails config, RuleBuilder rb)
{
foreach (var c in config.Chains)
{
if (c.IsDynamic)
{
rb.DefineDynamicChain(c.Dynamic);
}
foreach (var v in c.Versions)
{
var rules = _ruleSets[v];
var chains = rules.Chains;
foreach (var t in c.Tables)
{
if (c.IsDynamic)
{
rb.Dcr.RegisterDynamicChain(c.Dynamic, t, c.Name, v);
}
else if (!chains.HasChain(c.Name, t))
{
chains.AddChain(c.Name, t, _iptables);
}
}
}
}
}
private RuleBuilder InitEnvironment(Dictionary<String, EnvironmentDetails> environment)
{
RuleBuilder rb = new RuleBuilder(_iptables, "/var/x4b/bin/bpf/nfbpf_compile", _ruleSets);
var mappings = environment.AsParallel().Select((e) =>
{
if (e.Value.Language == "bash")
{
e.Value.Command = rb.ExecuteBash(e.Value.Command);
}
else if (e.Value.Language == "bpf")
{
e.Value.Command = rb.CompileBpf("RAW", e.Value.Command);
}
else if (e.Value.Language == "bpfl4")
{
e.Value.Command = rb.CompileBpf("RAW_TRANSPORT", e.Value.Command);
}
else if (e.Value.Language != "text")
{
throw new Exception("Invalid language: " + e.Value.Language);
}
return e;
});
foreach (var e in mappings)
{
rb.DefineMapping(e.Key, e.Value.Command, e.Value.Default);
}
return rb;
}
private void CreateSets(IpTablesDetails config, RuleBuilder rb)
{
foreach (var set in config.Sets)
{
var ipset = new IpSetSet(IpSetTypeHelper.StringToType(set.Type), set.Name, 0, set.Family, _iptables, IpSetSyncMode.SetAndEntries);
String[] resolved = set.Entries.ToArray();
if (ipset.Type == IpSetType.HashIp)
{
IPAddress ip;
int retries = 0;
do
{
List <Task> tasks = new List <Task>();
for (int index = 0; index < resolved.Length; index++)
{
var entry = resolved[index];
String entryIp = rb.Format(entry);
if (!IPAddress.TryParse(entryIp, out ip))
{
DomainName domain;
if (!DomainName.TryParse(entryIp, out domain))
{
throw new Exception("Unable to parse domain " + entryIp);
}
var asyncResult = _dns.ResolveAsync(domain).ContinueWith(CompleteLambda(index, resolved));
tasks.Add(asyncResult);
}
}
if (tasks.Any())
{
Task.WaitAll(tasks.ToArray());
}
} while (++retries <= 3 && resolved.Any((entry) => !IPAddress.TryParse(rb.Format(entry), out ip)));
for (int index = 0; index < resolved.Length; index++)
{
var entry = resolved[index];
String entryIp = rb.Format(entry);
if (!IPAddress.TryParse(entryIp, out ip))
{
throw new Exception("Unable to resolve " + entryIp);
}
}
}
//Check Uniqueness
HashSet <IpSetEntry> ipsetEntries = new HashSet <IpSetEntry>();
for (int index = 0; index < resolved.Length; index++)
{
var entry = resolved[index];
String entryIp = rb.Format(entry);
var setEntry = IpSetEntry.ParseFromParts(ipset, entryIp);
if (ipsetEntries.Add(setEntry))
{
ipset.Entries.Add(setEntry);
}
}
_sets.AddSet(ipset);
}
//Add new sets (dont delete!)
_sets.Sync((a) => false);
}
private IEnumerable<IpTablesRule> ParseAll(RuleBuilder rb, RuleDetails c)
{
var rule = c.Rule;
if (rule.Contains("{"))
{
foreach (var v in c.Versions)
{
var rules = _ruleSets[v];
foreach (var t in c.Tables)
{
IpTablesRule.ChainCreateMode chainMode = IpTablesRule.ChainCreateMode.DontCreateErrorInstead;
rule = c.Rule;
string formattedRule;
lock (_dynamicLock)
{
formattedRule = rb.Format(rule, t, v);
}
if (formattedRule != rule)
{
rule = formattedRule;
chainMode = IpTablesRule.ChainCreateMode.ReturnNewChain;
}
yield return IpTablesRule.Parse(rule, _iptables, rules.Chains, v, t, chainMode);
}
}
}
else
{
IpTablesRule ruleTemplate = null;
foreach (var v in c.Versions)
{
var chains = _ruleSets[v].Chains;
foreach (var t in c.Tables)
{
if (ruleTemplate == null)
{
ruleTemplate = IpTablesRule.Parse(rule, _iptables, chains, v, t,
IpTablesRule.ChainCreateMode.DontCreateErrorInstead);
yield return ruleTemplate;
}
else
{
//TODO: IPTables Rule clone
var theRule = new IpTablesRule(ruleTemplate);
theRule.Chain = chains.GetChainOrDefault(ruleTemplate.Chain.Name, t);
yield return theRule;
}
}
}
}
}
private void CreateSets(IpTablesDetails config, RuleBuilder rb)
{
foreach (var set in config.Sets)
{
var ipset = new IpSetSet(IpSetTypeHelper.StringToType(set.Type), set.Name, 0, set.Family, _iptables, IpSetSyncMode.SetAndEntries);
String[] resolved = set.Entries.ToArray();
if (ipset.Type == IpSetType.HashIp)
{
List<IAsyncResult> tasks = new List<IAsyncResult>();
for (int index = 0; index < resolved.Length; index++)
{
var entry = resolved[index];
String entryIp = rb.Format(entry);
IPAddress ip;
if (!IPAddress.TryParse(entryIp, out ip))
{
var asyncResult = Dns.BeginGetHostAddresses(entryIp, (a) =>
{
var ips = Dns.EndGetHostAddresses(a);
if (ips.Length == 0)
{
throw new Exception("Unable to resolve: " + entryIp);
}
String entryIp2 = ips.First().ToString();
resolved[(int) a.AsyncState] = entryIp2;
}, index);
tasks.Add(asyncResult);
}
}
if (tasks.Any()) {
WaitHandle.WaitAll(tasks.Select((a) => a.AsyncWaitHandle).ToArray());
}
}
//Check Uniqueness
HashSet<IpSetEntry> ipsetEntries = new HashSet<IpSetEntry>();
for (int index = 0; index < resolved.Length; index++)
{
var entry = resolved[index];
String entryIp = rb.Format(entry);
var setEntry = IpSetEntry.ParseFromParts(ipset, entryIp);
if (ipsetEntries.Add(setEntry))
{
ipset.Entries.Add(setEntry);
}
}
_sets.AddSet(ipset);
}
//Add new sets (dont delete!)
_sets.Sync((a) => false);
}
private void CreateRules(IpTablesDetails config, RuleBuilder rb)
{
var rules = config.Rules.AsParallel().AsOrdered()
.Where((c) => rb.IsConditionTrue(c.Condition))
.SelectMany((c) => ParseAll(rb, c)).AsSequential();
foreach(var rule in rules){
lock (_dynamicLock)
{
if (rb.Dcr.IsDynamic(rule.Chain))
{
rb.Dcr.AddRule(rule);
continue;
}
}
var chains = _ruleSets[rule.IpVersion].Chains;
IpTablesChain chain;
lock (chains)
{
chain = chains.GetChainOrDefault(rule.Chain.Name, rule.Chain.Table);
}
if (chain == null)
{
throw new Exception(String.Format("Chain was not created ipv{0},{1}:{2}",
rule.Chain.IpVersion, rule.Chain.Table, rule.Chain.Name));
}
lock (chain)
{
chain.AddRule(rule);
}
}
}