#
# Cookbook Name:: networking
# Recipe:: default
#
# Copyright 2010, OpenStreetMap Foundation.
# Copyright 2009, Opscode, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# = Requires
# * node[:networking][:nameservers]

require "ipaddr"

network_packages = []

node[:networking][:interfaces].each do |name, interface|
  if interface[:interface]
    network_packages |= ["vlan"] if interface[:interface] =~ /\.\d+$/
    network_packages |= ["ifenslave"] if interface[:bond]

    if interface[:role] && (role = node[:networking][:roles][interface[:role]])
      if role[interface[:family]]
        node.normal[:networking][:interfaces][name][:prefix] = role[interface[:family]][:prefix]
        node.normal[:networking][:interfaces][name][:gateway] = role[interface[:family]][:gateway]
      end

      node.normal[:networking][:interfaces][name][:metric] = role[:metric]
      node.normal[:networking][:interfaces][name][:zone] = role[:zone]
    end

    prefix = node[:networking][:interfaces][name][:prefix]

    node.normal[:networking][:interfaces][name][:netmask] = (~IPAddr.new(interface[:address]).mask(0)).mask(prefix)
    node.normal[:networking][:interfaces][name][:network] = IPAddr.new(interface[:address]).mask(prefix)
  else
    node.rm(:networking, :interfaces, name)
  end
end

package network_packages

template "/etc/network/interfaces" do
  source "interfaces.erb"
  owner "root"
  group "root"
  mode 0o644
end

execute "hostname" do
  action :nothing
  command "/bin/hostname -F /etc/hostname"
end

template "/etc/hostname" do
  source "hostname.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :run, "execute[hostname]"
end

template "/etc/hosts" do
  source "hosts.erb"
  owner "root"
  group "root"
  mode 0o644
end

unless node[:networking][:nameservers].empty?
  link "/etc/resolv.conf" do
    action :delete
    link_type :symbolic
    to "/run/resolvconf/resolv.conf"
    only_if { File.symlink?("/etc/resolv.conf") }
  end

  template "/etc/resolv.conf" do
    source "resolv.conf.erb"
    owner "root"
    group "root"
    mode 0o644
  end
end

node.interfaces(:role => :internal) do |interface|
  if interface[:gateway] && interface[:gateway] != interface[:address]
    search(:node, "networking_interfaces*address:#{interface[:gateway]}") do |gateway|
      next unless gateway[:openvpn]

      gateway[:openvpn][:tunnels].each_value do |tunnel|
        if tunnel[:peer][:address] # ~FC023
          route tunnel[:peer][:address] do
            netmask "255.255.255.255"
            gateway interface[:gateway]
            device interface[:interface]
          end
        end

        next unless tunnel[:peer][:networks]

        tunnel[:peer][:networks].each do |network|
          route network[:address] do
            netmask network[:netmask]
            gateway interface[:gateway]
            device interface[:interface]
          end
        end
      end
    end
  end
end

zones = {}

search(:node, "networking:interfaces").collect do |n|
  next if n[:fqdn] == node[:fqdn]

  n.interfaces.each do |interface|
    next unless interface[:role] == "external" && interface[:zone]

    zones[interface[:zone]] ||= {}
    zones[interface[:zone]][interface[:family]] ||= []
    zones[interface[:zone]][interface[:family]] << interface[:address]
  end
end

package "shorewall"

template "/etc/default/shorewall" do
  source "shorewall-default.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/shorewall.conf" do
  source "shorewall.conf.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/zones" do
  source "shorewall-zones.erb"
  owner "root"
  group "root"
  mode 0o644
  variables :type => "ipv4"
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/interfaces" do
  source "shorewall-interfaces.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/hosts" do
  source "shorewall-hosts.erb"
  owner "root"
  group "root"
  mode 0o644
  variables :zones => zones
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/conntrack" do
  source "shorewall-conntrack.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/policy" do
  source "shorewall-policy.erb"
  owner "root"
  group "root"
  mode 0o644
  notifies :restart, "service[shorewall]"
end

template "/etc/shorewall/rules" do
  source "shorewall-rules.erb"
  owner "root"
  group "root"
  mode 0o644
  variables :family => "inet"
  notifies :restart, "service[shorewall]"
end

service "shorewall" do
  action [:enable, :start]
  supports :restart => true
  status_command "shorewall status"
end

template "/etc/logrotate.d/shorewall" do
  source "logrotate.shorewall.erb"
  owner "root"
  group "root"
  mode 0o644
  variables :name => "shorewall"
end

firewall_rule "limit-icmp-echo" do
  action :accept
  family :inet
  source "net"
  dest "fw"
  proto "icmp"
  dest_ports "echo-request"
  rate_limit "s:1/sec:5"
end

%w[ucl ams bm].each do |zone|
  firewall_rule "accept-openvpn-#{zone}" do
    action :accept
    source zone
    dest "fw"
    proto "udp"
    dest_ports "1194:1197"
    source_ports "1194:1197"
  end
end

if node[:roles].include?("gateway")
  template "/etc/shorewall/masq" do
    source "shorewall-masq.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall]"
  end
else
  file "/etc/shorewall/masq" do
    action :delete
    notifies :restart, "service[shorewall]"
  end
end

unless node.interfaces(:family => :inet6).empty?
  package "shorewall6"

  template "/etc/default/shorewall6" do
    source "shorewall-default.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/shorewall6.conf" do
    source "shorewall6.conf.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/zones" do
    source "shorewall-zones.erb"
    owner "root"
    group "root"
    mode 0o644
    variables :type => "ipv6"
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/interfaces" do
    source "shorewall6-interfaces.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/hosts" do
    source "shorewall6-hosts.erb"
    owner "root"
    group "root"
    mode 0o644
    variables :zones => zones
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/conntrack" do
    source "shorewall-conntrack.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/policy" do
    source "shorewall-policy.erb"
    owner "root"
    group "root"
    mode 0o644
    notifies :restart, "service[shorewall6]"
  end

  template "/etc/shorewall6/rules" do
    source "shorewall-rules.erb"
    owner "root"
    group "root"
    mode 0o644
    variables :family => "inet6"
    notifies :restart, "service[shorewall6]"
  end

  service "shorewall6" do
    action [:enable, :start]
    supports :restart => true
    status_command "shorewall6 status"
  end

  template "/etc/logrotate.d/shorewall6" do
    source "logrotate.shorewall.erb"
    owner "root"
    group "root"
    mode 0o644
    variables :name => "shorewall6"
  end

  firewall_rule "limit-icmp6-echo" do
    action :accept
    family :inet6
    source "net"
    dest "fw"
    proto "ipv6-icmp"
    dest_ports "echo-request"
    rate_limit "s:1/sec:5"
  end
end

firewall_rule "accept-http" do
  action :accept
  source "net"
  dest "fw"
  proto "tcp:syn"
  dest_ports "http"
  rate_limit node[:networking][:firewall][:http_rate_limit]
  connection_limit node[:networking][:firewall][:http_connection_limit]
end

firewall_rule "accept-https" do
  action :accept
  source "net"
  dest "fw"
  proto "tcp:syn"
  dest_ports "https"
  rate_limit node[:networking][:firewall][:http_rate_limit]
  connection_limit node[:networking][:firewall][:http_connection_limit]
end