1 """Variables file for pcepuser suite.
3 Expected JSON templates are fairly long,
4 therefore there are moved out of testcase file.
5 Also, it is needed to generate base64 encoded tunnel name
6 from Mininet IP (which is not known beforehand),
7 so it is easier to employ Python here,
8 than do manipulation in Robot file."""
9 # Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
11 # This program and the accompanying materials are made available under the
12 # terms of the Eclipse Public License v1.0 which accompanies this distribution,
13 # and is available at http://www.eclipse.org/legal/epl-v10.html
16 from string import Template
19 __author__ = "Vratko Polak"
20 __copyright__ = "Copyright(c) 2015, Cisco Systems, Inc."
21 __license__ = "Eclipse Public License v1.0"
22 __email__ = "vrpolak@cisco.com"
25 def get_variables(mininet_ip):
26 """Return dict of variables for the given IP address of Mininet VM."""
28 # 'V' style of explanation.
29 # Comments analyze from high level, to low level, then code builds from low level back to high level.
30 # ### Pcep-topology JSON responses.
31 # Some testcases see only the tunnel created by pcc-mock start: "delegated tunnel" (ID 1).
32 # Other testcases see also tunnel created on ODL demand: "instatntiated tunnel" (ID 2).
33 # Both tunnels can have two states. "Default" upon creation with single hop "1.1.1.1",
34 # and "updated" after update-lsp, which prepends another hop "2.2.2.2".
35 # Variable naming always specifies delegated state first, and ends with _json to distinguish from operation data.
36 # The whole list: default_json, updated_json, updated_default_json, updated_updated_json.
37 # Oh, and the state without mock-pcc connected is off_json.
38 # off_json has '{}' substring and no variable data, so here it is as a special case:
39 variables['off_json'] = '''{
42 "topology-id": "pcep-topology",
44 "network-topology-pcep:topology-pcep": {}
49 # Ok, other _json strings will have more regular structure and some variable data,
50 # so we will be using templates heavily.
51 # First off, there is segment describing PCC which conatins IP address but is otherwise constant.
52 # So the top-level template will look like this:
53 json_templ = Template('''{
58 "network-topology-pcep:path-computation-client": {
60 "reported-lsp": [$LSPS
62 "state-sync": "synchronized",
64 "odl-pcep-ietf-stateful07:stateful": {
65 "lsp-update-capability": true,
66 "odl-pcep-ietf-initiated00:initiation": true
70 "node-id": "pcc://$IP"
73 "topology-id": "pcep-topology",
75 "network-topology-pcep:topology-pcep": {}
80 # The _json variables will differ only in $LSPS, but $IP will be present inside.
81 # Thus, the $IP substitution will come last, and any auxiliary substitutions before this final one
82 # will have to use safe_substitute().
83 # As you see, $LSPS is in json_templ without preceding newline.
84 # As a rule, a segment will always start with endline and end without endline,
85 # so that we can add comma where needed.
86 # Discussion amout delegated and instantiated implies that $LSPS is either a single delegated LSP
87 # or a pair of delegated and instantiated (separated by comma) LSPS, in appropriate state.
88 # Of course, one LSP always follow a structure, for which here is the template:
89 lsp_templ = Template('''
96 "processing-rule": false,
101 "odl-pcep-ietf-stateful07:lsp": {
102 "administrative": true,
105 "odl-pcep-ietf-initiated00:create": $CREATED,
108 "processing-rule": false,
114 "ipv4-extended-tunnel-id": "$IP",
115 "ipv4-tunnel-endpoint-address": "1.1.1.1",
116 "ipv4-tunnel-sender-address": "$IP"
121 "symbolic-path-name": {
129 # IDs were already talked about, IP will be set last. Now, $NAME.
130 # Pcc-mock uses a fixed naming scheme for delegated tunnels, so one more template can be written,
131 # but it is so simple we can write just the one-line code instead:
132 delegated_name = 'pcc_' + mininet_ip + '_tunnel_1' # 1 == ID
133 # For the instantiated tunnel, user is free to specify anything, even charachers such as \u0000 work.
134 # But as we need to plug the name to XML, let us try something more friendly:
135 instantiated_name = 'Instantiated tunnel' # the space is only somewhat evil character :)
136 # What is CODE? The NAME in base64 encoding (without endline):
137 delegated_code = binascii.b2a_base64(delegated_name)[:-1] # remove endline added by the library function
138 instantiated_code = binascii.b2a_base64(instantiated_name)[:-1]
139 # The remaining segment is HOPS, and that is the place where default and updated states differ.
140 # Once gain, there is a template for a single hop:
141 hop_templ = Template('''
144 "ip-prefix": "$HOPIP/32"
148 # The low-to-high part of V comes now, it is just substituting and concatenating.
150 final_hop = hop_templ.substitute({'HOPIP': '1.1.1.1'})
151 update_hop = hop_templ.substitute({'HOPIP': '2.2.2.2'})
152 both_hops = update_hop + ',' + final_hop
154 default_lsp_templ = Template(lsp_templ.safe_substitute({'HOPS': final_hop}))
155 updated_lsp_templ = Template(lsp_templ.safe_substitute({'HOPS': both_hops}))
156 repl_dict = {'NAME': delegated_name, 'ID': '1', 'CODE': delegated_code, 'CREATED': 'false'}
157 delegated_default_lsp = default_lsp_templ.safe_substitute(repl_dict)
158 delegated_updated_lsp = updated_lsp_templ.safe_substitute(repl_dict)
159 repl_dict = {'NAME': instantiated_name, 'ID': '2', 'CODE': instantiated_code, 'CREATED': 'true'}
160 instantiated_default_lsp = default_lsp_templ.safe_substitute(repl_dict)
161 instantiated_updated_lsp = updated_lsp_templ.safe_substitute(repl_dict)
162 # Json templates (without IP set).
163 repl_dict = {'LSPS': delegated_default_lsp}
164 default_json_templ = Template(json_templ.safe_substitute(repl_dict))
165 repl_dict = {'LSPS': delegated_updated_lsp}
166 updated_json_templ = Template(json_templ.safe_substitute(repl_dict))
167 repl_dict = {'LSPS': delegated_updated_lsp + ',' + instantiated_default_lsp}
168 updated_default_json_templ = Template(json_templ.safe_substitute(repl_dict))
169 repl_dict = {'LSPS': delegated_updated_lsp + ',' + instantiated_updated_lsp}
170 updated_updated_json_templ = Template(json_templ.safe_substitute(repl_dict))
171 # Final json variables.
172 repl_dict = {'IP': mininet_ip}
173 variables['default_json'] = default_json_templ.substitute(repl_dict)
174 variables['updated_json'] = updated_json_templ.substitute(repl_dict)
175 variables['updated_default_json'] = updated_default_json_templ.substitute(repl_dict)
176 variables['updated_updated_json'] = updated_updated_json_templ.substitute(repl_dict)
177 # ### Pcep operations XML data.
178 # There are three operations, so let us just write templates from information at
179 # https://wiki.opendaylight.org/view/BGP_LS_PCEP:Programmer_Guide#Tunnel_Management_for_draft-ietf-pce-stateful-pce-07_and_draft-ietf-pce-pce-initiated-lsp-00
180 # _xml describes content type and also distinguishes from similarly named _json strings.
181 add_xml_templ = Template(
182 '<input xmlns="urn:opendaylight:params:xml:ns:yang:topology:pcep">\n'
183 ' <node>pcc://$IP</node>\n'
184 ' <name>$NAME</name>\n'
185 ' <network-topology-ref xmlns:topo="urn:TBD:params:xml:ns:yang:network-topology">'
186 '/topo:network-topology/topo:topology[topo:topology-id="pcep-topology"]'
187 '</network-topology-ref>\n'
189 ' <lsp xmlns="urn:opendaylight:params:xml:ns:yang:pcep:ietf:stateful">\n'
190 ' <delegate>true</delegate>\n'
191 ' <administrative>true</administrative>\n'
195 ' <source-ipv4-address>$IP</source-ipv4-address>\n'
196 ' <destination-ipv4-address>1.1.1.1</destination-ipv4-address>\n'
198 ' </endpoints-obj>\n'
201 ' <loose>false</loose>\n'
202 ' <ip-prefix><ip-prefix>1.1.1.1/32</ip-prefix></ip-prefix>\n'
208 update_xml_templ = Template(
209 '<input xmlns="urn:opendaylight:params:xml:ns:yang:topology:pcep">\n'
210 ' <node>pcc://$IP</node>\n'
211 ' <name>$NAME</name>\n'
212 ' <network-topology-ref xmlns:topo="urn:TBD:params:xml:ns:yang:network-topology">'
213 '/topo:network-topology/topo:topology[topo:topology-id="pcep-topology"]'
214 '</network-topology-ref>\n'
216 ' <lsp xmlns="urn:opendaylight:params:xml:ns:yang:pcep:ietf:stateful">\n'
217 ' <delegate>true</delegate>\n'
218 ' <administrative>true</administrative>\n'
222 ' <loose>false</loose>\n'
223 ' <ip-prefix><ip-prefix>2.2.2.2/32</ip-prefix></ip-prefix>\n'
226 ' <loose>false</loose>\n'
227 ' <ip-prefix><ip-prefix>1.1.1.1/32</ip-prefix></ip-prefix>\n'
233 remove_xml_templ = Template(
234 '<input xmlns="urn:opendaylight:params:xml:ns:yang:topology:pcep">\n'
235 ' <node>pcc://$IP</node>\n'
236 ' <name>$NAME</name>\n'
237 ' <network-topology-ref xmlns:topo="urn:TBD:params:xml:ns:yang:network-topology">'
238 '/topo:network-topology/topo:topology[topo:topology-id="pcep-topology"]'
239 '</network-topology-ref>\n'
242 # The operations can be applied to either delegated or instantiated tunnel, NAME is the only distinguishing value.
243 # Also, the final IP substitution can be done here.
244 repl_dict = {'IP': mininet_ip}
245 repl_dict['NAME'] = delegated_name
246 variables['update_delegated_xml'] = update_xml_templ.substitute(repl_dict)
247 variables['remove_delegated_xml'] = remove_xml_templ.substitute(repl_dict)
248 repl_dict['NAME'] = instantiated_name
249 variables['add_instantiated_xml'] = add_xml_templ.substitute(repl_dict)
250 variables['update_instantiated_xml'] = update_xml_templ.substitute(repl_dict)
251 variables['remove_instantiated_xml'] = remove_xml_templ.substitute(repl_dict)
252 # All variables ready.