1 | #!/usr/local/bin/python |
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2 | |
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3 | class base: |
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4 | @staticmethod |
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5 | def init_class(c, arg): |
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6 | if isinstance(arg, dict): |
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7 | try: |
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8 | return c(**arg) |
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9 | except: |
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10 | print "%s" % arg |
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11 | raise |
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12 | elif isinstance(arg, c): |
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13 | return arg |
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14 | else: |
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15 | return None |
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16 | |
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17 | @staticmethod |
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18 | def make_list(a): |
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19 | if isinstance(a, basestring) or isinstance(a, dict): return [ a ] |
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20 | elif getattr(a, '__iter__', None): return a |
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21 | else: return [ a ] |
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22 | |
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23 | def get_attribute(self, key): |
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24 | rv = None |
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25 | attrs = getattr(self, 'attribute', None) |
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26 | if attrs: |
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27 | for a in attrs: |
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28 | if a.attribute == key: |
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29 | rv = a.value |
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30 | break |
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31 | return rv |
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32 | |
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33 | |
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34 | |
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35 | class ConsistencyError(RuntimeError): pass |
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36 | |
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37 | class Attribute(base): |
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38 | def __init__(self, attribute, value): |
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39 | self.attribute = attribute |
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40 | self.value = value |
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41 | |
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42 | def clone(self): |
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43 | return Attribute(attribute=self.attribute, value=self.value) |
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44 | |
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45 | def to_dict(self): |
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46 | return { 'attribute': self.attribute, 'value': self.value } |
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47 | |
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48 | class Capacity(base): |
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49 | def __init__(self, rate, kind): |
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50 | self.rate = rate |
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51 | self.kind = kind |
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52 | |
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53 | def clone(self): |
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54 | return Capacity(rate=self.rate, kind=self.kind) |
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55 | |
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56 | def to_dict(self): |
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57 | return { 'rate': self.rate, 'kind': self.kind } |
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58 | |
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59 | class Latency(base): |
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60 | def __init__(self, time, kind): |
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61 | self.time = time |
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62 | self.kind = kind |
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63 | |
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64 | def clone(self): |
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65 | return Latency(time=self.time, kind=self.kind) |
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66 | |
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67 | def to_dict(self): |
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68 | return { 'time': self.time, 'kind': self.kind } |
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69 | |
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70 | class Substrate(base): |
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71 | def __init__(self, name, capacity=None, latency=None, attribute=[]): |
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72 | self.name = name |
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73 | self.capacity = self.init_class(Capacity, capacity) |
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74 | self.latency = self.init_class(Latency, latency) |
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75 | self.attribute = [ self.init_class(Attribute, a) \ |
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76 | for a in self.make_list(attribute) ] |
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77 | self.interfaces = [ ] |
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78 | |
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79 | def clone(self): |
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80 | if self.capacity: c = self.capacity.clone() |
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81 | else: c = None |
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82 | |
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83 | if self.latency: l = self.latency.clone() |
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84 | else: l = None |
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85 | |
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86 | return Substrate(name=self.name, |
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87 | capacity=c, |
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88 | latency=l, |
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89 | attribute = [a.clone() for a in self.attribute]) |
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90 | |
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91 | def to_dict(self): |
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92 | rv = { 'name': self.name } |
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93 | if self.capacity: |
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94 | rv['capacity'] = self.capacity.to_dict() |
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95 | if self.latency: |
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96 | rv['latency'] = self.latency.to_dict() |
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97 | if self.attribute: |
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98 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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99 | return rv |
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100 | |
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101 | class CPU(base): |
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102 | def __init__(self, type, attribute=[]): |
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103 | self.type = type |
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104 | self.attribute = [ self.init_class(Attribute, a) for a in \ |
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105 | self.make_list(attribute) ] |
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106 | |
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107 | def clone(self): |
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108 | return CPU(type=self.type, |
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109 | attribute = [a.clone() for a in self.attribute]) |
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110 | |
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111 | def to_dict(self): |
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112 | rv = { 'type': self.type} |
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113 | if self.attribute: |
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114 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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115 | return rv |
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116 | |
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117 | class Storage(base): |
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118 | def __init__(self, amount, persistence, attribute=[]): |
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119 | if isinstance(amount, basestring): |
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120 | self.amount = float(amount) |
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121 | else: |
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122 | self.amount = amount |
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123 | self.presistence = persistence |
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124 | self.attribute = [ self.init_class(Attribute, a) \ |
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125 | for a in self.make_list(attribute) ] |
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126 | |
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127 | def clone(self): |
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128 | return Storage(amount=self.amount, persistence=self.persistence, |
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129 | attribute = [a.clone() for a in self.attribute]) |
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130 | |
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131 | def to_dict(self): |
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132 | rv = { 'amount': float(self.amount), 'persistence': self.persistence } |
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133 | if self.attribute: |
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134 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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135 | return rv |
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136 | |
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137 | class OperatingSystem(base): |
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138 | def __init__(self, name=None, version=None, distribution=None, |
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139 | distributionversion=None, attribute=[]): |
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140 | self.name = name |
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141 | self.version = version |
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142 | self.distribution = distribution |
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143 | self.distributionversion = distributionversion |
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144 | self.attribute = [ self.init_class(Attribute, a) \ |
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145 | for a in self.make_list(attribute) ] |
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146 | |
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147 | def clone(self): |
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148 | return OperatingSystem(name=self.name, |
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149 | version=self.version, |
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150 | distribution=self.distribution, |
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151 | distributionversion=self.distributionversion, |
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152 | attribute = [ a.clone() for a in self.attribute]) |
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153 | |
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154 | def to_dict(self): |
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155 | rv = { } |
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156 | if self.name: rv['name'] = self.name |
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157 | if self.version: rv['version'] = self.version |
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158 | if self.distribution: rv['version'] = self.distribution |
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159 | if self.distributionversion: rv['version'] = self.distributionversion |
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160 | if self.attribute: |
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161 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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162 | return rv |
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163 | |
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164 | class Software(base): |
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165 | def __init__(self, location, install=None, attribute=[]): |
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166 | self.location = location |
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167 | self.install = install |
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168 | self.attribute = [ self.init_class(Attribute, a)\ |
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169 | for a in self.make_list(attribute) ] |
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170 | |
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171 | def clone(self): |
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172 | return Software(location=self.location, install=self.install, |
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173 | attribute=[a.clone() for a in self.attribute]) |
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174 | |
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175 | def to_dict(self): |
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176 | rv = { 'location': self.location } |
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177 | if self.install: rv['install'] = self.install |
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178 | if self.attribute: |
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179 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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180 | return rv |
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181 | |
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182 | class Interface(base): |
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183 | def __init__(self, substrate, capacity=None, latency=None, attribute=[], |
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184 | element=None): |
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185 | self.substrate = self.make_list(substrate) |
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186 | self.capacity = self.init_class(Capacity, capacity) |
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187 | self.latency = self.init_class(Latency, latency) |
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188 | self.attribute = [ self.init_class(Attribute, a) \ |
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189 | for a in self.make_list(attribute) ] |
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190 | self.element = element |
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191 | self.subs = [ ] |
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192 | |
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193 | def clone(self): |
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194 | if self.capacity: c = self.capacity.clone() |
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195 | else: c = None |
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196 | |
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197 | if self.latency: l = self.latency.clone() |
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198 | else: l = None |
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199 | |
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200 | return Interface(substrate=self.substrate, |
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201 | capacity=c, latency=l, |
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202 | attribute = [ a.clone() for a in self.attribute]) |
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203 | |
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204 | def to_dict(self): |
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205 | rv = { 'substrate': self.substrate } |
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206 | if self.capacity: |
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207 | rv['capacity'] = self.capacity.to_dict() |
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208 | if self.latency: |
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209 | rv['latency'] = self.latency.to_dict() |
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210 | if self.attribute: |
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211 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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212 | return rv |
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213 | |
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214 | class Computer(base): |
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215 | def __init__(self, name=[], cpu=[], os=[], software=[], storage=[], |
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216 | interface=[], attribute=[]): |
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217 | def assign_element(i): |
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218 | i.element = self |
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219 | |
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220 | self.name = self.make_list(name) |
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221 | self.cpu = [ self.init_class(CPU, c) for c in self.make_list(cpu) ] |
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222 | self.os = [ self.init_class(OperatingSystem, c) \ |
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223 | for c in self.make_list(os) ] |
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224 | self.software = [ self.init_class(Software, c) \ |
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225 | for c in self.make_list(software) ] |
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226 | self.storage = [ self.init_class(Storage, c) \ |
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227 | for c in self.make_list(storage) ] |
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228 | self.interface = [ self.init_class(Interface, c) \ |
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229 | for c in self.make_list(interface) ] |
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230 | self.attribute = [ self.init_class(Attribute, a) \ |
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231 | for a in self.make_list(attribute) ] |
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232 | map(assign_element, self.interface) |
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233 | |
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234 | def clone(self): |
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235 | return Computer(name=self.name, |
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236 | cpu=[x.clone() for x in self.cpu], |
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237 | os=[x.clone() for x in self.os], |
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238 | software=[x.clone() for x in self.software], |
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239 | storage=[x.clone() for x in self.storage], |
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240 | interface=[x.clone() for x in self.interface], |
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241 | attribute=[x.clone() for x in self.attribute]) |
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242 | |
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243 | def to_dict(self): |
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244 | rv = { } |
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245 | if self.name: |
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246 | rv['name'] = self.name |
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247 | if self.cpu: |
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248 | rv['cpu'] = [ c.to_dict() for c in self.cpu ] |
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249 | if self.os: |
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250 | rv['os'] = [ o.to_dict() for o in self.os ] |
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251 | if self.software: |
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252 | rv['software'] = [ s.to_dict() for s in self.software ] |
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253 | if self.storage: |
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254 | rv['storage'] = [ s.to_dict for s in self.storage ] |
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255 | if self.interface: |
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256 | rv['interface'] = [ i.to_dict() for i in self.interface ] |
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257 | if self.attribute: |
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258 | rv['attribute'] = [ i.to_dict() for i in self.attribute ] |
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259 | return { 'computer': rv } |
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260 | |
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261 | class Other(base): |
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262 | def __init__(self, interface=[], attribute=[]): |
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263 | self.interface = [ self.init_class(Interface, c) \ |
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264 | for c in self.make_list(interface) ] |
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265 | self.attribute = [ self.init_class(Attribute, c) \ |
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266 | for c in self.make_list(attribute) ] |
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267 | |
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268 | def clone(self): |
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269 | return Other(interface=[i.clone() for i in self.interface], |
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270 | attribute=[a.clone() for a in attribute]) |
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271 | |
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272 | def to_dict(self): |
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273 | if self.interface: |
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274 | rv['interface'] = [ i.to_dict() for i in self.interface ] |
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275 | if self.attribute: |
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276 | rv['attribute'] = [ a.to_dict() for a in self.attribute ] |
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277 | |
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278 | |
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279 | class Topology(base): |
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280 | @staticmethod |
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281 | def init_element(e): |
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282 | """ |
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283 | e should be of the form { typename: args } where args is a dict full of |
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284 | the right parameters to initialize the element. e should have only one |
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285 | key, but we walk e's keys in an arbitrary order and instantiate the |
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286 | first key we know how to. |
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287 | """ |
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288 | classmap = { |
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289 | 'computer': Computer, |
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290 | 'other': Other, |
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291 | } |
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292 | |
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293 | if isinstance(e, dict): |
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294 | for k in e.keys(): |
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295 | cl = classmap.get(k, None) |
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296 | if cl: return cl(**e[k]) |
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297 | else: |
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298 | return e |
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299 | |
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300 | def __init__(self, substrates=[], elements=[]): |
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301 | self.substrates = [ self.init_class(Substrate, s) \ |
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302 | for s in self.make_list(substrates) ] |
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303 | self.elements = [ self.init_element(e) \ |
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304 | for e in self.make_list(elements) ] |
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305 | self.incorporate_elements() |
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306 | |
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307 | def incorporate_elements(self): |
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308 | |
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309 | # Could to this init in one gulp, but we want to look for duplicate |
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310 | # substrate names |
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311 | substrate_map = { } |
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312 | for s in self.substrates: |
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313 | s.interfaces = [ ] |
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314 | if not substrate_map.has_key(s.name): |
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315 | substrate_map[s.name] = s |
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316 | else: |
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317 | raise ConsistencyError("Duplicate substrate name %s" % s.name) |
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318 | |
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319 | for e in self.elements: |
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320 | for i in e.interface: |
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321 | i.element = e |
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322 | i.subs = [ ] |
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323 | for sn in i.substrate: |
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324 | # NB, interfaces have substrate names in their substrate |
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325 | # attribute. |
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326 | if substrate_map.has_key(sn): |
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327 | sub = substrate_map[sn] |
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328 | i.subs.append(sub) |
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329 | sub.interfaces.append(i) |
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330 | else: |
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331 | raise ConsistencyError("No such substrate for %s" % sn) |
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332 | |
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333 | def clone(self): |
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334 | return Topology(substrates=[s.clone() for s in self.substrates], |
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335 | elements=[e.clone() for e in self.elements]) |
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336 | |
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337 | |
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338 | def make_indices(self): |
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339 | sub_index = dict([(s.name, s) for s in self.substrates]) |
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340 | elem_index = dict([(n, e) for e in self.elements for n in e.name]) |
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341 | |
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342 | def to_dict(self): |
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343 | rv = { } |
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344 | if self.substrates: |
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345 | rv['substrates'] = [ s.to_dict() for s in self.substrates ] |
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346 | if self.elements: |
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347 | rv['elements'] = [ s.to_dict() for s in self.elements ] |
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348 | return rv |
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349 | |
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350 | def topology_from_xml(string=None, file=None, filename=None, top="topology"): |
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351 | import xml.parsers.expat |
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352 | |
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353 | class parser: |
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354 | def __init__(self): |
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355 | self.stack = [ ] |
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356 | self.chars = "" |
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357 | self.key = "" |
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358 | self.have_chars = False |
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359 | self.current = { } |
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360 | self.in_cdata = False |
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361 | |
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362 | def start_element(self, name, attrs): |
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363 | self.chars = "" |
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364 | self.have_chars = False |
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365 | self.key = str(name) |
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366 | self.stack.append((self.current, self.key)) |
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367 | self.current = { } |
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368 | |
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369 | def end_element(self, name): |
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370 | if self.have_chars: |
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371 | self.chars = self.chars.strip() |
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372 | if len(self.chars) >0: |
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373 | addit = self.chars |
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374 | else: |
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375 | addit = self.current |
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376 | else: |
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377 | addit = self.current |
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378 | |
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379 | parent, key = self.stack.pop() |
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380 | if parent.has_key(key): |
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381 | if isinstance(parent[key], list): |
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382 | parent[key].append(addit) |
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383 | else: |
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384 | parent[key] = [parent[key], addit] |
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385 | else: |
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386 | parent[key] = addit |
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387 | self.current = parent |
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388 | self.key = key |
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389 | |
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390 | self.chars = "" |
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391 | self.have_chars = False |
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392 | |
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393 | def char_data(self, data): |
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394 | self.have_chars = True |
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395 | self.chars += data |
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396 | |
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397 | p = parser() |
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398 | xp = xml.parsers.expat.ParserCreate() |
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399 | |
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400 | xp.StartElementHandler = p.start_element |
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401 | xp.EndElementHandler = p.end_element |
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402 | xp.CharacterDataHandler = p.char_data |
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403 | |
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404 | num_set = len([ x for x in (string, filename, file)\ |
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405 | if x is not None ]) |
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406 | |
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407 | if num_set != 1: |
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408 | raise RuntimeError("Exactly one one of file, filename and string " + \ |
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409 | "must be set") |
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410 | elif filename: |
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411 | f = open(filename, "r") |
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412 | xp.ParseFile(f) |
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413 | elif file: |
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414 | xp.ParseFile(file) |
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415 | elif string: |
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416 | xp.Parse(string, isfinal=True) |
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417 | else: |
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418 | return None |
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419 | |
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420 | return Topology(**p.current[top]) |
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421 | |
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422 | def topology_to_xml(t, top=None): |
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423 | """ |
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424 | Print the topology as XML. This is quick and dirty, but should work for |
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425 | many purposes. Convert the topology to a dict and print it recursively. |
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426 | """ |
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427 | from xml.sax.saxutils import escape |
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428 | |
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429 | def dict_to_xml(e, top=None): |
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430 | if top: rv = "<%s>" % top |
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431 | else: rv = "" |
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432 | |
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433 | for k in e.keys(): |
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434 | if isinstance(e[k], (basestring, int, float, long)): |
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435 | rv += "<%s>%s</%s>" % (k, escape(e[k]), k) |
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436 | elif isinstance(e[k], dict): |
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437 | rv += "<%s>%s</%s>" % (k, dict_to_xml(e[k]), k) |
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438 | elif getattr(e[k], '__iter__', None): |
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439 | for ee in e[k]: |
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440 | if isinstance(ee, dict): |
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441 | rv += "<%s>%s</%s>" % (k, dict_to_xml(ee), k) |
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442 | else: |
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443 | rv += "<%s>%s</%s>" % (k, escape(ee), k) |
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444 | else: |
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445 | raise ConsistencyError("What is this?? %s %s" % (k, e[k])) |
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446 | if top: rv += "</%s>" % top |
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447 | return rv |
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448 | |
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449 | return dict_to_xml(t.to_dict(), top) |
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450 | |
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451 | |
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452 | def topology_to_vtopo(t): |
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453 | nodes = [ ] |
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454 | lans = [ ] |
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455 | |
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456 | for eidx, e in enumerate(t.elements): |
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457 | n = { } |
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458 | if e.name: name = e.name[0] |
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459 | else: name = "unnamed_node%d" % eidx |
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460 | |
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461 | ips = [ ] |
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462 | for i in e.interfaces: |
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463 | ip = i.get_attribute('ip4_address') |
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464 | ips.append(ip) |
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465 | port = "%s:%d" % (name, idx) |
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466 | for idx, s in enumerate(i.subs): |
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467 | bw = 100000 |
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468 | delay = 0.0 |
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469 | if s.capacity: |
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470 | bw = s.capacity.rate |
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471 | if i.capacity: |
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472 | bw = i.capacity.rate |
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473 | |
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474 | if s.latency: |
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475 | delay = s.latency.time |
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476 | if i.latency: |
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477 | bw = i.latency.time |
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478 | |
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479 | lans.append({ |
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480 | 'member': port, |
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481 | 'vname': s.name, |
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482 | 'ip': ip, |
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483 | 'vnode': name, |
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484 | 'delay': delay, |
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485 | 'bandwidth': bw, |
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486 | }) |
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487 | nodes.append({ |
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488 | 'ips': ":".join(ips), |
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489 | 'vname': name, |
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490 | }) |
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491 | |
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492 | nodes.append(n) |
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493 | return { 'vtopo': { 'node': node, 'lan': lan } } |
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