Class: Dcmgr::Models::SecurityGroupRule

Inherits:
BaseNew
  • Object
show all
Defined in:
lib/dcmgr/models/security_group_rule.rb

Constant Summary

Constants inherited from BaseNew

BaseNew::LOCK_TABLES_KEY

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseNew

Proxy, dataset, default_row_lock_mode=, install_data, install_data_hooks, lock!, unlock!, #with_timestamps?

Class Method Details

.parse_rule(rule) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
 
# File 'lib/dcmgr/models/security_group_rule.rb', line 25

def self.parse_rule(rule)
  rule = rule.strip.gsub(/[\s\t]+/, '')
  from_group = false
  
  # ex.
  # "tcp:22,22,ip4:0.0.0.0"
  # "udp:53,53,ip4:0.0.0.0"
  # "icmp:-1,-1,ip4:0.0.0.0"
  
  # 1st phase
  # ip_tport    : tcp,udp? 1 - 16bit, icmp: -1
  # id_port has been separeted in first phase.
  from_pair, ip_tport, source_pair = rule.split(',')
  
  next if from_pair.nil?
  next if ip_tport.nil?
  next if source_pair.nil?
  
  # 2nd phase
  # ip_protocol : [ tcp | udp | icmp ]
  # ip_fport    : tcp,udp? 1 - 16bit, icmp: -1
  ip_protocol, ip_fport = from_pair.split(':')
  
  # protocol    : [ ip4 | ip6 | security_group_uuid ]
  # ip_source   : ip4? xxx.xxx.xxx.xxx./[0-32], ip6? (not yet supprted)
  protocol, ip_source = source_pair.split(':')
  
  s = StringScanner.new(protocol)
  until s.eos?
    case
    when s.scan(/ip6/)
      # TODO#FUTURE: support IPv6 address format
      next
    when s.scan(/ip4/)
      # IPAddress doesn't support prefix '0'.
      ip_addr, prefix = ip_source.split('/', 2)
      if prefix.to_i == 0
        ip_source = ip_addr
      end
    when s.scan(/sg-\w+/)
      from_group = true
    else
      raise "Unexpected protocol '#{s.peep(20)}'"
    end
  end
  
  if from_group == false
    #p "from_group:(#{from_group}) ip_source -> #{ip_source}"
    ip = IPAddress(ip_source)
    ip_source = case ip.u32
                when 0
                  "#{ip.address}/0"
                else
                  "#{ip.address}/#{ip.prefix}"
                end
  else
    ip_source = protocol
    protocol = nil
  end
  
  case ip_protocol
  when 'tcp', 'udp'
    ip_fport = ip_fport.to_i
    ip_tport = ip_tport.to_i
    
    # validate port range
    [ ip_fport, ip_tport ].each do |port|
      raise "Out of range port number: #{port}" unless port >= 1 && port <= 65535
    end
    
    if !(ip_fport <= ip_tport)
      raise "Invalid IP port range: #{ip_fport} <= #{ip_tport}"
    end
    
    {
      :ip_protocol => ip_protocol,
      :ip_fport    => ip_fport,
      :ip_tport    => ip_tport,
      :protocol    => protocol,
      :ip_source   => ip_source,
    }
  when 'icmp'
    # via http://docs.amazonwebservices.com/AWSEC2/latest/CommandLineReference/
    #
    # For the ICMP protocol, the ICMP type and code must be specified.
    # This must be specified in the format type:code where both are integers.
    # Type, code, or both can be specified as -1, which is a wildcard.
    
    icmp_type = ip_fport.to_i
    icmp_code = ip_tport.to_i
    
    # icmp_type
    case icmp_type
    when -1
    when 0, 3, 5, 8, 11, 12, 13, 14, 15, 16, 17, 18
    else
      raise "Unsupported ICMP type number: #{icmp_type}"
    end
    
    # icmp_code
    case icmp_code
    when -1
    when 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
      # when icmp_type equals -1 icmp_code must equal -1.
      next if icmp_type == -1
    else
      raise "Unsupported ICMP code number: #{icmp_code}"
    end
    
    {
      :ip_protocol => ip_protocol,
      :icmp_type   => ip_tport.to_i, # ip_tport.to_i, # -1 or 0,       3,    5,       8,        11, 12, 13, 14, 15, 16, 17, 18
      :icmp_code   => ip_fport.to_i, # ip_fport.to_i, # -1 or 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
      :protocol    => protocol,
      :ip_source   => ip_source,
    }
  end
end

Instance Method Details

#to_hash ⇒ Object 



11
12
13
14
15
16
 
# File 'lib/dcmgr/models/security_group_rule.rb', line 11

def to_hash
  {
    :permission => permission,
    
  }.merge(self.class.parse_rule(self.permission))
end

#validate ⇒ Object 



19
20
21
22
23
 
# File 'lib/dcmgr/models/security_group_rule.rb', line 19

def validate
  super

  self.class.parse_rule(self.permission)
end