| 21 | | These fragments can either be described in [FeddAbout#ExperimentDescriptions the extended ns-2] language or in simple xml containing a [http://fedd.deterlab.net/wiki/FeddPluginArchitecture#TopologyDescriptionLanguage topdl] description. |
| | 21 | These fragments can either be described in [FeddAbout#ExperimentDescriptions the extended ns-2] language or in simple xml containing a [http://fedd.deterlab.net/wiki/FeddPluginArchitecture#TopologyDescriptionLanguage topdl] description. The three-connection node is encoded in ns-2 as: |
| | 22 | |
| | 23 | {{{ |
| | 24 | # simple DETER topology |
| | 25 | # COMPOSITION: bot0:optional:Node:Single,Node |
| | 26 | # COMPOSITION: bot0:optional:Node:Single,Node |
| | 27 | # COMPOSITION: bot0:optional:Node:Single,Node |
| | 28 | |
| | 29 | set ns [new Simulator] |
| | 30 | source tb_compat.tcl |
| | 31 | |
| | 32 | |
| | 33 | set bot0 [$ns node] |
| | 34 | tb-set-node-testbed $bot0 "deter" |
| | 35 | |
| | 36 | $ns rtproto Static |
| | 37 | $ns run |
| | 38 | |
| | 39 | |
| | 40 | }}} |
| | 41 | |
| | 42 | The comments containing the {{{COMPOSITION}}} keyword contain the constraints. The first colon-separated field gives the node name to which the constraint applies, the second whether the field is optional or required, the third the type of connector, and the last a comma-separated list of acceptable types to connect. Optional constraints need not be satisfied, though our satisfier tries to satsify as many as possible. |
| | 43 | |
| | 44 | The same component in XML is: |
| | 45 | |
| | 46 | {{{ |
| | 47 | <component> |
| | 48 | <constraints> |
| | 49 | <constraint> |
| | 50 | <name>bot0</name> |
| | 51 | <required>False</required> |
| | 52 | <provides>Node</provides> |
| | 53 | <accepts>Single</accepts> |
| | 54 | <accepts>Node</accepts> |
| | 55 | </constraint> |
| | 56 | <constraint> |
| | 57 | <name>bot0</name> |
| | 58 | <required>False</required> |
| | 59 | <provides>Node</provides> |
| | 60 | <accepts>Single</accepts> |
| | 61 | <accepts>Node</accepts> |
| | 62 | </constraint> |
| | 63 | <constraint> |
| | 64 | <name>bot0</name> |
| | 65 | <required>False</required> |
| | 66 | <provides>Node</provides> |
| | 67 | <accepts>Single</accepts> |
| | 68 | <accepts>Node</accepts> |
| | 69 | </constraint> |
| | 70 | </constraints> |
| | 71 | <experiment> |
| | 72 | <version>1.0</version> |
| | 73 | <elements> |
| | 74 | <computer> |
| | 75 | <name>bot0</name> |
| | 76 | <attribute> |
| | 77 | <attribute>type</attribute> |
| | 78 | <value>pc</value> |
| | 79 | </attribute> |
| | 80 | <attribute> |
| | 81 | <attribute>testbed</attribute> |
| | 82 | <value>deter</value> |
| | 83 | </attribute> |
| | 84 | <attribute> |
| | 85 | <attribute>failureaction</attribute> |
| | 86 | <value>fatal</value> |
| | 87 | </attribute> |
| | 88 | </computer> |
| | 89 | </elements> |
| | 90 | </experiment> |
| | 91 | </component> |
| | 92 | }}} |
