/// <summary>
/// Append extra options to an existing rule (via parsing)
/// </summary>
/// <param name="rule"></param>
/// <param name="chains"></param>
/// <param name="createChain"></param>
public void AppendToRule(String rule, IpTablesChainSet chains = null, bool createChain = false)
{
string[] arguments = ArgumentHelper.SplitArguments(rule);
int count = arguments.Length;
try
{
var parser = new RuleParser(arguments, this, chains, Chain.Table);
//Parse the extra options
bool not = false;
for (int i = 0; i < count; i++)
{
if (arguments[i] == "!")
{
not = true;
continue;
}
i += parser.FeedToSkip(i, not);
not = false;
}
//Only replace the chain if a new one has been supplied
if (parser.GetChainName() != null)
{
var chain = parser.GetChain(_system);
if (chain == null)
{
if (!createChain)
{
throw new IpTablesNetException(String.Format("Unable to find chain: {0}", parser.ChainName));
}
chain = parser.CreateNewChain(_system, chain.IpVersion);
}
Chain = chain;
}
}
catch (Exception ex)
{
throw new IpTablesParserException(rule, ex);
}
}
/// <summary>
/// Parse a IPTables rule
/// </summary>
/// <param name="rule"></param>
/// <param name="system"></param>
/// <param name="chains"></param>
/// <param name="defaultTable"></param>
/// <param name="createChain"></param>
/// <param name="ipVersion"></param>
/// <returns></returns>
public static IpTablesRule Parse(String rule, NetfilterSystem system, IpTablesChainSet chains,
String defaultTable = "filter", bool createChain = false)
{
string[] arguments = ArgumentHelper.SplitArguments(rule);
int count = arguments.Length;
var ipRule = new IpTablesRule(system, null);
try
{
var parser = new RuleParser(arguments, ipRule, chains, defaultTable);
bool not = false;
for (int i = 0; i < count; i++)
{
if (arguments[i] == "!")
{
not = true;
continue;
}
i += parser.FeedToSkip(i, not);
not = false;
}
var chain = parser.GetChain(system);
if (chain == null)
{
if (!createChain)
{
throw new IpTablesNetException(String.Format("Unable to find chain: {0}", parser.ChainName));
}
chain = parser.CreateNewChain(system, chains == null ? 4 : chains.IpVersion);
}
ipRule.Chain = chain;
}
catch (Exception ex)
{
throw new IpTablesParserException(rule, ex);
}
return(ipRule);
}
