Class: OsCtld::NetInterface::Routed

Inherits:
Veth
  • Object
show all
Extended by:
OsCtl::Lib::Utils::System, Utils::Ip
Defined in:
lib/osctld/net_interface/routed.rb

Constant Summary collapse

INTERFACE = 
'osrtr0'.freeze
DEFAULT_IPV4 = 
IPAddress.parse('255.255.255.254/32')

Instance Attribute Summary collapse

Attributes inherited from Veth

#rx_queues, #tx_queues, #veth

Attributes inherited from Base

#ct, #hwaddr, #index, #max_rx, #max_tx, #name

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils::Ip

ip, tc

Methods inherited from Veth

#active_ip_versions, #down, #dup, #fetch_veth_name, #has_ip?, #hook_path, #ifb_veth, #ips, #is_up?, #load_ip_list, #mode_path, #rename, #render_opts, #save_ip_list, #set, #set_shaper_rx, #set_shaper_tx, #unset_shaper_rx, #unset_shaper_tx, #veth_hook_dir

Methods included from Utils::SwitchUser

#ct_attach, #ct_syscmd

Methods inherited from Base

#can_add_ip?, #down, #dup, #has_ip?, #initialize, #ips, #is_down?, #is_up?, #rename, #render_opts, #set, type, #type

Methods included from Lockable

#exclusively, included, #inclusively, #init_lock, #lock, #unlock

Constructor Details

This class inherits a constructor from OsCtld::NetInterface::Base

Instance Attribute Details

#routes ⇒ Object (readonly)

Returns the value of attribute routes.



26
27
28
 
# File 'lib/osctld/net_interface/routed.rb', line 26

def routes
  @routes
end

Class Method Details

.setup ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/osctld/net_interface/routed.rb', line 14

def self.setup
  begin
    ip(:all, [:link, :show, :dev, INTERFACE])
    return
  rescue SystemCommandFailed => e
    raise if e.rc != 1
  end

  ip(:all, [:link, :add, INTERFACE, :type, :dummy])
  ip(4, [:addr, :add, DEFAULT_IPV4.to_string, :dev, INTERFACE])
end

Instance Method Details

#add_ip(addr, route) ⇒ Object 



86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
 
# File 'lib/osctld/net_interface/routed.rb', line 86

def add_ip(addr, route)
  super(addr)

  v = addr.ipv4? ? 4 : 6
  r = @routes.add(route) if route && !@routes.contains?(route)

  ct.inclusively do
    next if ct.state != :running

    # Add host route
    ip(v, %i[route add] + r.ip_spec + [:dev, veth]) if r

    # Add IP within the CT
    ct_syscmd(
      ct,
      ['ip', "-#{v}", 'addr', 'add', addr.to_string, 'dev', name],
      valid_rcs: [2]
    )

    # Ensure the default route exists
    via = default_via(v)

    ct_syscmd(
      ct,
      ['ip', "-#{v}", 'route', 'add', via.to_s, 'dev', name],
      valid_rcs: [2]
    )
    ct_syscmd(
      ct,
      ['ip', "-#{v}", 'route', 'add', 'default', 'via', via.to_s, 'dev', name],
      valid_rcs: [2]
    )
  end
end

#add_route(addr, via: nil) ⇒ Object 



172
173
174
175
176
177
178
179
180
 
# File 'lib/osctld/net_interface/routed.rb', line 172

def add_route(addr, via: nil)
  route = @routes.add(addr, via:)

  ct.inclusively do
    next if ct.state != :running

    ip(route.ip_version, %i[route add] + route.ip_spec + [:dev, veth])
  end
end

#can_run_distconfig? ⇒ Boolean

DistConfig can be run only after the interface has been created

Returns:

  • (Boolean) 


82
83
84
 
# File 'lib/osctld/net_interface/routed.rb', line 82

def can_run_distconfig?
  exclusively { !veth.nil? }
end

#create(opts) ⇒ Object

Parameters:

  • opts (Hash)

Options Hash (opts):

  • name (String) 


30
31
32
33
34
 
# File 'lib/osctld/net_interface/routed.rb', line 30

def create(opts)
  super

  @routes = Routing::Table.new
end

#default_via(v) ⇒ IPAddress::IPv4, IPAddress::IPv6

Parameters:

  • v (4, 6) —

    IP version

Returns:

  • (IPAddress::IPv4, IPAddress::IPv6) 


208
209
210
211
212
213
214
215
 
# File 'lib/osctld/net_interface/routed.rb', line 208

def default_via(v)
  case v
  when 4
    DEFAULT_IPV4
  when 6
    get_ipv6_link_local
  end
end

#del_all_ips(ip_v, keep_routes) ⇒ Object

Parameters:

  • ip_v (Integer, nil) 


160
161
162
163
164
165
166
 
# File 'lib/osctld/net_interface/routed.rb', line 160

def del_all_ips(ip_v, keep_routes)
  exclusively do
    (ip_v ? [ip_v] : [4, 6]).each do |v|
      @ips[v].clone.each { |addr| del_ip(addr, keep_routes) }
    end
  end
end

#del_all_routes(ip_v = nil) ⇒ Object

Parameters:

  • ip_v (Integer, nil) (defaults to: nil) 


194
195
196
197
198
199
200
201
202
203
204
 
# File 'lib/osctld/net_interface/routed.rb', line 194

def del_all_routes(ip_v = nil)
  removed = @routes.remove_all(ip_v)

  ct.inclusively do
    next if ct.state != :running

    removed.each do |route|
      ip(route.ip_version, %i[route del] + route.ip_spec + [:dev, veth])
    end
  end
end

#del_ip(addr, keep_route) ⇒ Object 



121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
 
# File 'lib/osctld/net_interface/routed.rb', line 121

def del_ip(addr, keep_route)
  super(addr)

  routes_to_remove = []
  v = addr.ipv4? ? 4 : 6

  unless keep_route
    r = @routes.remove(addr)
    routes_to_remove << r if r
  end

  # Remove all routes that are routed _via_ `addr`
  @routes.remove_version_if(v) do |route|
    if route.via && route.via.to_s == addr.to_s
      routes_to_remove << route
      true
    else
      false
    end
  end

  ct.inclusively do
    next if ct.state != :running

    # Remove host route
    routes_to_remove.each do |route|
      ip(v, %i[route del] + route.ip_spec + [:dev, veth])
    end

    # Remove IP from within the CT
    ct_syscmd(
      ct,
      ['ip', "-#{v}", 'addr', 'del', addr.to_string, 'dev', name],
      valid_rcs: [2]
    )
  end
end

#del_route(addr) ⇒ Object 



182
183
184
185
186
187
188
189
190
191
 
# File 'lib/osctld/net_interface/routed.rb', line 182

def del_route(addr)
  route = @routes.remove(addr)
  return unless route

  ct.inclusively do
    next if ct.state != :running

    ip(route.ip_version, %i[route del] + route.ip_spec + [:dev, veth])
  end
end

#get_ipv6_link_local ⇒ Object (protected) 



219
220
221
222
223
224
225
226
227
228
229
 
# File 'lib/osctld/net_interface/routed.rb', line 219

def get_ipv6_link_local
  link = exclusively { veth.clone }

  local_ifaddr = Socket.getifaddrs.detect do |ifaddr|
    ifaddr.name == link && ifaddr.addr.ip? && ifaddr.addr.ipv6?
  end

  raise "unable to find link-local IPv6 address for #{veth}" unless local_ifaddr

  IPAddress.parse(local_ifaddr.addr.ip_address.split('%').first)
end

#has_route?(addr) ⇒ Boolean

Returns:

  • (Boolean) 


168
169
170
 
# File 'lib/osctld/net_interface/routed.rb', line 168

def has_route?(addr)
  @routes.contains?(addr)
end

#load(cfg) ⇒ Object 



36
37
38
39
40
 
# File 'lib/osctld/net_interface/routed.rb', line 36

def load(cfg)
  super

  @routes = Routing::Table.load(cfg['routes'] || {})
end

#save ⇒ Object 



42
43
44
45
46
 
# File 'lib/osctld/net_interface/routed.rb', line 42

def save
  super.merge({
    'routes' => @routes.dump
  })
end

#setup ⇒ Object 



48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/osctld/net_interface/routed.rb', line 48

def setup
  super

  return if ct.fresh_state != :running

  iplist = ip(:all, [:addr, :show, :dev, veth], valid_rcs: [1])

  return unless iplist.exitstatus == 1

  log(
    :info,
    ct,
    "veth '#{veth}' of container '#{ct.id}' no longer exists, " \
    'ignoring'
  )
  @veth = nil
  nil
end

#up(veth) ⇒ Object 



67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/osctld/net_interface/routed.rb', line 67

def up(veth)
  super

  [4, 6].each do |v|
    next if @routes.empty?(v)

    @routes.each_version(v) do |route|
      ip(v, %i[route add] + route.ip_spec + [:dev, veth])
    end
  end

  File.write(File.join('/proc/sys/net/ipv4/conf', veth, 'rp_filter'), '1')
end