How To Setup Service

• netopeerguid compilation requires libjson-devel, libnetconf2, and libyang packages.

• run following commands in this directory

$ make
$ make install

• netopeerguid runs as a service daemon. It listens on the UNIX socket (/var/run/netopeerguid.sock) for communication with frontend and on TCP socket 8080 for notifications over WebSocket. Start the service by

$ service netopeerguid.rc start

If there is any problem with connection to the UNIX socket, please check file permissions.

List of dependencies

• json-c
• libnetconf2
• libyang

(with development packages)

Optionally: libwebsockets

netopeerguid Message Format

UNIX socket (with default path /tmp/netopeerguid.sock) is used for communication with netopeerguid. Messages are formated using JSON and encoded using

Chunked Framing Mechanism described in RFC6242 (http://tools.ietf.org/html/rfc6242#section-4.2) with the following content.

Client is free to send multiple requests when the communication socket to the netopeerguid is opened.

Data types:

sJSON: string representation of a JSON object

SID: generated unique session identifier (unsigned integer starting with 1)

Replies

Replies are in the format:

{
    "<SID#1>": {
        <reply>
    },
    "<SID#2>": {
        <reply>
    },
    …
    "<SID#last>": {
        <reply>
    }
}

Reply format is defined below.

Reply

1) OK

• key: type (int), value: 0

2) DATA

• key: type (int), value: 1
• key: data (sJSON)

3) ERROR

• key: type (int), value: 2
• key: error-message (string)

Optional:

• key: error-tag (string)
• key: error-type (string)
• key: error-severity (string)
• key: error-app-tag (string)
• key: error-path (string)
• key: bad-attribute (string)
• key: bad-element (string)
• key: bad-namespace (string)
• key: session-id (int)

4) INFO

• key: type (int), value: 3
• key: sid (int), value: session ID
• key: version (string), value: NETCONF protocol version
• key: host (string), value: hostname of the NETCONF server
• key: port (string), value: port of the NETCONF server
• key: user (string), value: username of the user holding the NETCONF session
• key: capabilities (array of strings), value: list of supported capabilities
• key: models (array of strings), value: list of models used by the session

Example reply to connect:

{
    "<new-SID>": {
        "type": 0
    }
}

Requests

1) Request to create NETCONF session (connect)

• key: type (int), value: 4
• key: user (string)

Optional:

• key: host (string), "localhost" if not specified
• key: port (string), "830" if not specified
• key: pass (string), value: plain text password, mandatory if "privatekey" is not set
• key: privatekey (string), value: filesystem path to the private key, if set, "pass" parameter s optional and changes into the pass for this private key

2) Request to close NETCONF session (disconnect)

• key: type (int), value: 5
• key: sessions (array of ints), value: array of SIDs

3) NETCONF <get> (returns merged data)

• key: type (int), value: 6
• key: sessions (array of ints), value: array of SIDs
• key: strict (bool), value: whether return error on unknown data

Optional:

• key: filter (string), value: xml subtree filter

4) NETCONF <get-config> (returns array of responses merged with schema)

• key: type (int), value: 7
• key: sessions (array of ints), value: array of SIDs
• key: source (string), value: running|startup|candidate
• key: strict (bool), value: whether return error on unknown data

Optional:

• key: filter (string), value: xml subtree filter

5) NETCONF <edit-config>

• key: type (int), value: 8
• key: sessions (array of ints), value: array of SIDs
• key: target (string), value: running|startup|candidate
• key: configs (array of sJSON, with the same order as sessions), value: array of edit onfiguration data according to NETCONF RFC for each session

Optional:

• key: source (string), value: config|url, default value: config
• key: default-operation (string), value: merge|replace|none
• key: error-option (string), value: stop-on-error|continue-on-error|rollback-on-error
• key: uri-source (string), required when "source" is "url", value: uri
• key: test-option (string), value: notset|testset|set|test, default value: testset

6) NETCONF <copy-config>

• key: type (int), value: 9
• key: sessions (array of ints), value: array of SIDs
• key: source (string), value: running|startup|candidate|url|config
• key: target (string), value: running|startup|candidate|url

Optional:

• key: uri-source (string), required when "source" is "url", value: uri
• key: uri-target (string), required when "target" is "url", value: uri
• key: configs (array of sJSON, with the same order as sessions), required when "source" is config”, value: array of new complete configuration data for each session,

7) NETCONF <delete-config>

• key: type (int), value: 10
• key: sessions (array of ints), value: array of SIDs
• key: target (string), value: running|startup|candidate|url

Optional:

• key: url (string), value: target URL

8) NETCONF <lock>

• key: type (int), value: 11
• key: sessions (array of ints), value: array of SIDs
• key: target (string), value: running|startup|candidate

9) NETCONF <unlock>

• key: type (int), value: 12
• key: sessions (array of ints), value: array of SIDs
• key: target (string), value: running|startup|candidate

10) NETCONF <kill-session>

• key: type (int), value: 13
• key: sessions (array of ints), value: array of SIDs
• key: session-id (int), value: SID of the session to kill

11) Provide information about NETCONF session

• key: type (int), value: 14
• key: sessions (array of ints), value: array of SIDs

12) Perform generic operation not included in base NETCONF

• key: type (int), value: 15
• key: sessions (array of ints), value: array of SIDs
• key: contents (array of sJSON with same index order as sessions array), value: array of sJSON ata as content of the NETCONF's envelope

13) get-schema

• key: type (int), value: 16
• key: sessions (array of ints), value: array of SIDs
• key: identifiers (array of strings with same index order as sessions array), value: array of chema identifiers

Optional:

• key: format (string), value: format of the schema (yin or yang)

14) reloadhello Update hello message of NETCONF session

• key: type (int), value: 17
• key: sessions (array of ints), value: array of SIDs

15) notif_history Provide list of notifications from past.

• key: type (int), value: 18
• key: sessions (array of ints), value: array of SIDs
• key: from (int64), value: start time in history
• key: to (int64), value: end time

16) validate Validate datastore or url

• key: type (int), value: 19
• key: sessions (array of ints), value: array of SIDs
• key: target (string), value: running|startup|candidate|url

Required when target is "url":

• key: url (string), value: URL of datastore to validate

Enumeration of Message type (libnetconf)

	/* Enumeration of Message type (taken from mod_netconf.c) */

	const REPLY_OK				= 0;
	const REPLY_DATA			= 1;
	const REPLY_ERROR			= 2;
	const REPLY_INFO			= 3;
	const MSG_CONNECT			= 4;
	const MSG_DISCONNECT		= 5;
	const MSG_GET 				= 6;
	const MSG_GETCONFIG			= 7;
	const MSG_EDITCONFIG		= 8;
	const MSG_COPYCONFIG		= 9;
	const MSG_DELETECONFIG		= 10;
	const MSG_LOCK 				= 11;
	const MSG_UNLOCK			= 12;
	const MSG_KILL				= 13;
	const MSG_INFO				= 14;
	const MSG_GENERIC			= 15;
	const MSG_GETSCHEMA			= 16;
	const MSG_RELOADHELLO		= 17;
	const MSG_NTF_GETHISTORY	= 18;
	const MSG_VALIDATE			= 19;

	/* Enumeration of Message type - New for libyang */
	const SCH_QUERY				= 100;
	const SCH_MERGE				= 101;

1) Query schema node by XPATH

• key: type (int), value: 100
• key: sessions (array of ints), value: array of SIDs
• key: filters (array of arrays of strings with same index order as sessions), value: array of XPath arrays (with "prefix" = module name) values of target node in schema (start with '/') or module names (do not start with '/')

In module query, the top-nodes array includes only nodes that can appear in data or some descendant can (container, choice, leaf, leaflist, list, anyxml). The rpcs array contains all RPCs defined in the module.

Optional:

• key: load_children(boolean, default = false), value: if set to true, children schema information will be loaded too. Otherwise only part "$@name": {'children': [...]} will be loaded.

1. Example response for "/ietf-interfaces:interfaces" with load_children:

(partialy based on https://tools.ietf.org/html/draft-ietf-netmod-yang-json-05#appendix-A)

{
	"$@ietf-interfaces:interfaces": {
		"eltype": "container",
		"description": "Interface configuration parameters.",
		"config": true,
		"status": "current",
		"mandatory": false,
		"children": [
			"interface"
		]
	},
	"ietf-interfaces:interfaces": {
		"$@interface": { ... }
		...
	}
}

2. Example response for "/ietf-interfaces:interfaces/interface" without load_children:

{
	"$@ietf-interfaces:interface": {
		"eltype": "list",
		"description": " ... ",
		"config": true,
		"status": "current",
		"mandatory": false,
		"keys": [
			"name"
		],
		"children": [
			"name",
			"description",
			"type",
			"enabled",
			"link-up-down-trap-enable",
			"ipv4",
			"ipv6"
		]
	}
}

3. Example response for "ietf-interfaces" without load_children:

{
	"$@@ietf-interfaces": {
		"yang-version": "1.0",
		"namespace": "urn:ietf:params:xml:ns:yang:ietf-interfaces",
		"prefix": "if",
		"contact": " ... ",
		"organization": "IETF NETMOD (NETCONF Data Modeling Language) Working Group",
		"revision": "2014-05-08",
		"description": " ... ",
		"imports": [
			{
				"name": "ietf-yang-types",
				"prefix": "yang"
			}
		],
		"top-nodes": [
			"interfaces",
			"interfaces-state"
		]
	}
}

4. Example response for "ietf-ip" with load_children:

{
	"$@@ietf-ip": {
		"yang-version": "1.0",
		"namespace": "urn:ietf:params:xml:ns:yang:ietf-ip",
		"prefix": "ip",
		"contact": " ... ",
		"organization": "IETF NETMOD (NETCONF Data Modeling Language) Working Group",
		"revision": "2014-06-16",
		"description": " ... ",
		"imports": [
			{
				"name": "ietf-interfaces",
				"prefix": "if"
			},
			{
				"name": "ietf-inet-types",
				"prefix": "inet"
			},
			{
				"name": "ietf-yang-types",
				"prefix": "yang"
			}
		]
	}
}

2) Merge given XML configuration with schema

• key: type (int), value: 101
• key: sessions (array of ints), value: array of SIDs
• key: configurations (array of sJSON with same index order as sessions array), value: array of clean sJSON configurations without schema information

Merged format for schema

Each node of or request will be "merged" with schema in following scenario:

1) each information from schema will be added as sibling of node as an attribute defined by $@node_name:

Example:

{
	"$@node_name": {
		"eltype": "list",
		"config": true,
		"type": "enumeration",
		"iskey": false
	}
}

2) if node has some children defined in schema, these children will be defined as children array:

Example:

{
	"$@node_name": {
		"children": ["interface", "interface-state"]
	}
}

3) if some attribute is reference to some user defined type, referenced value should be added too as JSON object - same result as defined in SCH_QUERY:

Example:

{
	"$@interface": {
		"eltype": "list",
		"config": "true",
		"type": "enumeration",
		"iskey": "false",
	},

	"interface": [
		{
		"$@type": {
			"typedef": {
				// same result as SCH_QUERY for this typedef
				"type": "uint8",
				"range": "0 .. 100",
				"description": "Percentage"
			}
		},
		"type": "iana-if-type:ethernetCsmacd"
		}
	]
}

4) if some node is enumeration, available values will be defined as array

Example:

{
	"$@node_name": {
		"enumval": [int8, int16, int32, int64, uint8, uint16, uint32, uint64, float, string]
	}
}

5) choice - case

Example based on https://tools.ietf.org/html/rfc6020#section-7.9

{
	"$@transfer": {
		"eltype": "container",
		"config": "true",
		"choice": ["how"]
	},
	"transfer": {
		"$@how": {
			"eltype": "choice",
			"default": "interval",
			"cases": ["interval", "daily", "manual"]
		},
		"how": {
			"$@interval": {
				"eltype": "case",
				"children": ["interval"]
			},
			"$@daily": {
				"eltype": "case",
				"children": ["daily", "time-of-day"]
			}
			"$@manual": {
				"eltype": "case",
				"children": ["manual"]
			}
		},
		"$@interval": {
			"eltype": "leaf",
			"type": "uint16",
			"default": "30",
			"units": "minutes"
		},
		"$@daily": {
			"eltype": "leaf",
			"type": "empty"
		},
		"$@time-of-day": {
			"eltype": "leaf",
			"type": "string",
			"default": "1am",
			"units": "24-hour-clock"
		},
		"$@manual": {
			"eltype": "leaf",
			"type": "string"
		}
	}
}

Complete merged JSON example:

{
	"$@ietf-interfaces:interfaces": {
		"eltype": "leaf",
		"config": "false",
		"type": "enumeration",
		"enumval": [int8, int16, int32, int64, uint8, uint16, uint32, uint64, float, string],
		"description": "The data type of the parameters argument.,
		"mandatory": "false",
		"iskey": "false",
		"children": ["interface", "interface-state"]
	},
	"ietf-interfaces:interfaces": {
		"$@interface": {
			"eltype": "list",
			"config": "true",
			"type": "enumeration",
			"iskey": "false",
		},
		"interface": [
			{
				"$@name": {
					"eltype": “leaf”,
					"config": "true",
					"type": "string"
				},
				"name": "eth0",
				"$@type": {
					"eltype": “leaf”,
					"config": “true”,
					"type": “link-load”,
					"typedef": { // just an example, this differs in the model
						"type": "uint8",
						"range": "0 .. 100",
						description "Percentage"
					}
				},
				"type": "iana-if-type:ethernetCsmacd",
				"$@enabled": {
					"eltype": “leaf”,
					"config": “true”,
					"type": "boolean"
				},
				"enabled": false
			},
			{
				"$@name": { ... }
				"name": "eth1",
				"$@type": { ... }
				"type": "iana-if-type:ethernetCsmacd",
				"$@enabled": { ... }
				"enabled": true,
				"$@ex-vlan:vlan-tagging": { ... }
				"ex-vlan:vlan-tagging": true
			}
		]
	},
	"$@ietf-interfaces:interfaces-state": {
			"eltype": "leaf",
			"config": "false",
			"type": "enumeration",
			"enumval": [int8, int16, int32, int64, uint8, uint16, uint32, uint64, float, string],
			"description": "The data type of the parameters argument.,
			"mandatory": "false",
			"iskey": "false"
		}
	"ietf-interfaces:interfaces-state": {
		...
	}
}

Substatements definitions

anyxml - XML string which should be converted info JSON in mod_netconf (if it is possible) or in NetopeerGUI backend

{
	"$@data": {
		"eltype": “anyxml”
	},
	"data": {
		"root": {
			"node": "value"
		}
	}
}

augment - applied automatically in result

bit- type

{
	"bits": [
		{
			"name": “first-bit”,
			"position": 0
		},
		{
			"name": “second-bit”,
			"position": 1
		},
		...
	]
}

case

{
	"children": [“child1”, “child2”, …],
	"choice": [“choice1”, “choice2”, …]
}

choice - defined in example 5

config

{
	"config": true/false
}

container - defined in "eltype"

{
	"$@interface": {
		"eltype": "container"
	}
}

default

{
	"default": "default value of node"
}

description

{
	"description": "The text of description of node"
}

enum - values are transformed into "enumval"

{
	"$@ietf-interfaces:interfaces-state": {
		"type": "enumeration",
		"enumval": [int8, int16, int32, int64, uint8, uint16, uint32, uint64, float]
	}
}

fraction-digits

{
	"fraction-digits": 2
}

grouping - rendered in "uses" statement directly

key

{
	"$@list-name": {
		"eltype": "list"
		"keys": [“key-element-name”]
	}
}

leaf

{
	"$@leaf-name": {
		"eltype": "leaf",
		"iskey": true/false
	}
}

leaf-list

{
	"$@leaf-name": {
		"eltype": "leaf-list"
	}
}

length - renders same value as defined in schema

{
	"length": "1..255"
}

list

{
	"$@list-name": {
		"eltype": "list"
	},
	"list-name": {
		"$@leaf-name": {
			"eltype": “leaf”,
			...
		}
	}
}

mandatory

{
	"mandatory": "true/false"
}

max-elements

{
	"max-elements": number
}

min-elements

{
	"min-elements": number
}

ordered-by

{
	"order-by": “user/system”
}

path - if defined, target schema informations must be defined, even if data does not exists

{
	"$@target": { … },
	"$@node": {
		"eltype": “leafref”,
		"path": “path/to/target”
	}
}

pattern

{
	"pattern": ["[0-9a-fA-F]*"]
}

position - no semantical informations, see "bits" statement

presence

{
	"presence": “the meaning of presence in container”
}

range

{
	"range": "11..max"
}

reference

{
	"reference": "[RFC 3986](https://tools.ietf.org/html/rfc3986): Uniform Resource Identifier (URI): Generic Syntax"
}

refine - renders target automatically

rpc - rendered as any other data information with schema. In NetopeerGUI is rendered as a standalone tree. Output substatement is not needed in GUI.

{
	"$@rock-the-house": {
		"eltype": "rpc"
	},
	"rock-the-house": {
		"input": {
			"$@zip-code": {
				"eltype": “leaf”,
				"type": “string”
			}
			"zip-code": { … }
		}
	}
}

status

{
	"status": “current/deprecated/obsolete”
}

type - same value as defined in schema

{
	"type": “string”
}

typedef - defined in example 3

union

{
	"type": “union”,
	"types": [
		{
			(type1)
		},
		{
			(type2)
		},
		...
	]
}

unique

{
	"$@list-name": {
		"eltype": “list”,
		"unique": [“ip”, “port”]
	}
}

units

{
	"units": “string of the units”
}

uses - renders content of "grouping" statement directly

must

{
	"must": [“must-condition-1”, “must-condition-2”, …]
}

when

{
	"when": “when-condition”
}

require-instance

{
	"require-instance": true/false
}

identity - all values are transformed into "identityval"

{
	"ietf-interfaces:interfaces": {
		"interface": {
			"$@type": {
			"type": "identityref",
					"identityval": [interface-type, iana-if-type:iana-interface-type, iana-if-type:other, iana-if-type:regular1822, ...]
				}
			}
		}
	}
}

extension - support for NACM extensions only

{
	"ext": “default-deny-write”/”default-deny-all”
}

Only a part of module information:

contact

{
	"contact": “contact information”
}

organization

{
	"organization": “organization information”
}

namespace

{
	"namespace": “model namespace”
}

prefix

{
	"prefix": “model prefix”
}

revision

{
	"revision": “last model revision date”
}

revision-date - part of import and include output

yang-version

{
	"yang-version": “1.0/1.1”
}

import

{
	"imports": [
		{
			"name": “import name”,
			"prefix": “import prefix”,
			"revision": “import revision date”
		}
	]
}

include

{
	"includes": [
		{
			"name": “include name”,
			"revision": “include revision date”
		}
	]
}

Not used (we don't need this information):

• "belongs-to"
• "deviate"
• "deviation"
• "error-app-tag"
• "error-message"
• "if-feature"
• "notification"
• "yin-element"
• "argument"