Enable connections limits on a per-source basis

[chef.git] / cookbooks / networking / resources / firewall_rule.rb

diff --git a/cookbooks/networking/resources/firewall_rule.rb b/cookbooks/networking/resources/firewall_rule.rb
index a3e2e7eb0bb0816cf37dde3be25892199958a1a0..665c0cb84ee9d279f3e65241e12b7777045e57dd 100644 (file)
--- a/cookbooks/networking/resources/firewall_rule.rb
+++ b/cookbooks/networking/resources/firewall_rule.rb
@@ -51,6 +51,21 @@ end
 
 action_class do
   def add_rule(action)
+    if node[:networking][:firewall][:engine] == "shorewall"
+      add_shorewall_rule(action)
+    elsif node[:networking][:firewall][:engine] == "nftables"
+      if new_resource.family.nil?
+        add_nftables_rule(action, "inet")
+        add_nftables_rule(action, "inet6")
+      elsif new_resource.family.to_s == "inet"
+        add_nftables_rule(action, "inet")
+      elsif new_resource.family.to_s == "inet6"
+        add_nftables_rule(action, "inet6")
+      end
+    end
+  end
+
+  def add_shorewall_rule(action)
     rule = {
       :action => action.to_s.upcase,
       :source => new_resource.source,
@@ -76,4 +91,84 @@ action_class do
       end
     end
   end
+
+  def add_nftables_rule(action, family)
+    rule = []
+
+    ip = case family
+         when "inet" then "ip"
+         when "inet6" then "ip6"
+         end
+
+    proto = case new_resource.proto
+            when "udp" then "udp"
+            when "tcp", "tcp:syn" then "tcp"
+            end
+
+    if new_resource.source_ports != "-"
+      rule << "#{proto} sport { #{nftables_source_ports} }"
+    end
+
+    if new_resource.dest_ports != "-"
+      rule << "#{proto} dport { #{nftables_dest_ports} }"
+    end
+
+    if new_resource.source == "osm"
+      rule << "#{ip} saddr @#{ip}-osm-addresses"
+    elsif new_resource.source =~ /^net:(.*)$/
+      addresses = Regexp.last_match(1).split(",").join(", ")
+
+      rule << "#{ip} saddr { #{addresses} }"
+    end
+
+    if new_resource.dest == "osm"
+      rule << "#{ip} daddr @#{ip}-osm-addresses"
+    elsif new_resource.dest =~ /^net:(.*)$/
+      addresses = Regexp.last_match(1).split(",").join(", ")
+
+      rule << "#{ip} daddr { #{addresses} }"
+    end
+
+    if new_resource.proto == "tcp:syn"
+      rule << "ct state new"
+    end
+
+    if new_resource.connection_limit != "-"
+      set = "connlimit-#{new_resource.rule}-#{ip}"
+
+      node.default[:networking][:firewall][:sets] << set
+
+      rule << "add @#{set} { #{ip} saddr ct count #{new_resource.connection_limit} }"
+    end
+
+    # if new_resource.rate_limit =~ %r{^s:(\d+)/sec:(\d+)$}
+    #   set = "#{new_resource.rule}-#{ip}"
+    #   rate = Regexp.last_match(1)
+    #   burst = Regexp.last_match(2)
+    #
+    #   node.default[:networking][:firewall][:sets] << set
+    #
+    #   rule << "add @#{set} { #{ip} saddr limit rate #{rate}/second burst #{burst} packets }"
+    # end
+
+    rule << case action
+            when :accept then "accept"
+            when :drop then "jump log-and-drop"
+            when :reject then "jump log-and-reject"
+            end
+
+    if new_resource.source == "fw"
+      node.default[:networking][:firewall][:outgoing] << rule.join(" ")
+    elsif new_resource.dest == "fw"
+      node.default[:networking][:firewall][:incoming] << rule.join(" ")
+    end
+  end
+
+  def nftables_source_ports
+    new_resource.source_ports.to_s.sub(/:$/, "-65535").gsub(":", "-")
+  end
+
+  def nftables_dest_ports
+    new_resource.dest_ports.to_s.sub(/:$/, "-65535").gsub(":", "-")
+  end
 end