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README.md

Supported Targets	ESP32	ESP32-S2

NAN Console Example

(See the README.md file in the upper level 'examples' directory for more information about examples.)

Introduction

Neighbor Awareness Networking (NAN) is a protocol that allows Wi-Fi devices to discover services in their proximity. NAN uses direct device-to-device communication and does not require any Internet or AP connection. Multiple NAN devices which are in the vicinity will form a NAN cluster which allows them to communicate with each other. Devices within a NAN cluster can advertise or look for services using NAN Service Discovery protocols. A Publisher advertises a service and a Subscriber searches for a service. A subscriber either listens passively (Passive mode) or sends out broadcast Action frames (Active mode). Similarly a publisher either broadcasts its services (Unsolicited mode) or replies to Active subscribers (Solicited Mode). Matching of services is done by service name and optionally matching filters. Once a Subscriber gets a match to the service, it can either send Follow-up frames or negotiate using NDP frames to establish a datapath. After NDP is setup both devices will obtain a IPv6 address and can use it for further communication.

How to use example

With the console users can configure NAN and its services on the fly. Flashing the example will first show a brief guide on the commands available on the console -

==================================================================
 |       Basic Steps to test NAN Discovery & Datapath               |
 |                                                                  |
 |  Below are short commands that use defaults, use 'help'          |
 |  to see detailed command parameters available                    |
 |                                                                  |
 |  # NAN Discovery -                                               |
 |  1. To start NAN issue 'nan -S', to stop it use 'nan -T'         |
 |  2. Publish OR Subscribe a service using 'publish' OR 'subscribe'|
 |  4. After service match, send a text to Peer with service id 5 - |
 |      > send -p 5 -t Hello                                        |
 |  5. Cancel an ongoing service with id 5 -                        |
 |      > publish -C -i 5                                           |
 |                                                                  |
 |  # NAN Datapath -                                                |
 |  1. Subscriber can initiate datapath using 'ndp -I -p [pub_id]'  |
 |  2. After NDP setup, use 'ping [Peer's IPv6]' to test datapath   |
 |  3. Terminate the NDP using 'ndp -D'                             |
 |                                                                  |
 ====================================================================

nan>

Mode detailed information about command parameters is given below -

Starting NAN

nan> nan -S OR nan> nan -S -p 2 -c 6 -w 5 p - Master Preference c - Operating channel w - Warmup time

Stopping NAN

nan> nan -T

Publish a service with name 'ESP_NAN-Service'

nan> publish OR nan> publish -n test -t 0 -f GREEN n - Service name t - Type (0: Unsolicited, 1: Solicited) f - Matching filter

Subscribe to a NAN service 'ESP_NAN-Service'

nan> subscribe OR nan> subscribe -n test -t 0 -f GREEN n - Service name t - Type (0: passive, 1: active) f - Matching filter

Cancel a NAN service

Cancel a Subscribe service with Inst Id 5 nan> subscribe -C -i 5 Cancel a Publish service with Inst Id 5 nan> publish -C -i 5

Send a Follow-up message To send message to amatched Publish OR Subscribe service

nan> send -p 5 -t Hello p - Peer’s service instance id t - Message

Send a Datapath request To Initiate NDP Req to the last matched Publisher -

nan> ndp -I -p 5 p - Publish Id

Start a IPv6 Ping with Peer

nan> ping FE80::E2E2:E6FF:FE7B:C132

Terminate the current NAN Datapath

nan> ndp -T -d 5 d - NDP id

NAN Datapath Example Output using defaults

Device 1 : Publish a service with default configuration -

nan> nan -S
I (28125) NAN: State Init => Scanning

I (31135) NAN: Start own Cluster, Id 50:6f:9a:01:0e:76
I (31135) NAN: State Scanning => AnchorMaster

I (31135) nan_app: NAN Discovery started.
nan>
nan> publish
I (77245) nan_console: Publishing service 'ESP_NAN-Service' [Publish id - 5]
nan>
I (21775) nan_app: NDP confirmed with NDP id 1 [Peer IPv6 - FE80::E2E2:E6FF:FE6A:7AFE]
I (23625) nan_app: NAN Data Interface ready [IPv6 - fe80:0000:0000:0000:e2e2:e6ff:fe7b:c132, type - LINK_LOCAL]
I (30265) nan_app: NDP id 1 with Peer e0:e2:e6:6a:7a:fe terminated (reason: 0)

Device 2 : Subscribe a service with default configuration and start a datapath with matched Publisher

nan> nan -S
I (142915) NAN: State Init => Scanning

I (145915) NAN: Join Cluster with Id 50:6f:9a:01:0e:76
I (145915) NAN: State Scanning => AnchorMaster

I (145915) nan_app: NAN Discovery started.
nan>
nan> subscribe
I (159685) nan_console: Subscribed to Service 'ESP_NAN-Service' [Subscribe id - 5]
nan> I (159845) nan_app: Service matched with e0:e2:e6:7b:c1:32 [Peer Publish id - 5]
nan>
nan> ndp -I -p 5
I (196125) nan_console: Initiated NDP with e0:e2:e6:7b:c1:32 [NDP id - 1]
nan> E (196425) wifi:Committed slots 0x7fff0000 for Peer e0:e2:e6:7b:c1:32 on Channel 6
I (196425) nan_app: NDP confirmed with NDP id 1 [Peer IPv6 - FE80::E2E2:E6FF:FE7B:C132]
I (197625) nan_app: NAN Data Interface ready [IPv6 - fe80:0000:0000:0000:e2e2:e6ff:fe6a:7afe, type - LINK_LOCAL]
nan> ping FE80::E2E2:E6FF:FE7B:C132
I (212975) nan_console: Pinging Peer with IPv6 addr FE80::E2E2:E6FF:FE7B:C132
nan> W (213495) wifi:<ba-add>idx:5 (ifx:2, e0:e2:e6:7b:c1:32), tid:0, ssn:0, winSize:64
I (213555) nan_console: 64 bytes from FE80::E2E2:E6FF:FE7B:C132 icmp_seq=1 ttl=0 time=577 ms
I (214015) nan_console: 64 bytes from FE80::E2E2:E6FF:FE7B:C132 icmp_seq=2 ttl=0 time=40 ms
I (215095) nan_console: 64 bytes from FE80::E2E2:E6FF:FE7B:C132 icmp_seq=3 ttl=0 time=121 ms
I (216165) nan_console: 64 bytes from FE80::E2E2:E6FF:FE7B:C132 icmp_seq=4 ttl=0 time=190 ms
I (217445) nan_console: 64 bytes from FE80::E2E2:E6FF:FE7B:C132 icmp_seq=5 ttl=0 time=475 ms
I (217975) nan_console:
--- FE80::E2E2:E6FF:FE7B:C132 ping statistics ---
I (217975) nan_console: 5 packets transmitted, 5 received, 0% packet loss, time 1403ms
nan>
nan> ndp -T -d 1
nan> I (28175) nan_app: NDP id 1 with Peer e0:e2:e6:7b:c1:32 terminated (reason: 0)

NAN Follow-up example output using advanced commands

Device 1 : Publisher uses a filter and responds to a message from a Subscriber

nan> nan -S
I (142915) NAN: State Init => Scanning

I (145915) NAN: Join Cluster with Id 50:6f:9a:01:0e:76
I (145915) NAN: State Scanning => AnchorMaster

I (145915) nan_app: NAN Discovery started.
nan>
nan> publish -n TEST -f GREEN
I (61935) nan_console: Publishing service 'TEST' [Publish id - 5]
nan>
I (93635) nan_app: Received message 'Hello' from Peer e0:e2:e6:6a:7a:fe [Peer Service id - 5]
nan> send -p 5 -t Welcome
I (114605) nan_console: Sent message 'Welcome' to NAN Peer e0:e2:e6:6a:7a:fe.

Device 2 : Subscriber uses a filter and sends a message to the matched Publisher

nan> nan -S
I (142915) NAN: State Init => Scanning

I (145915) NAN: Join Cluster with Id 50:6f:9a:01:0e:76
I (145915) NAN: State Scanning => AnchorMaster

I (145915) nan_app: NAN Discovery started.
nan>
nan> subscribe -n TEST -f GREEN
I (159685) nan_console: Subscribed to Service 'TEST' [Subscribe id - 5]
nan> I (159845) nan_app: Service matched with e0:e2:e6:7b:c1:32 [Peer Publish id - 5]
nan> send -p 5 -t Hello
I (99445) nan_console: Sent message 'Hello' to NAN Peer e0:e2:e6:7b:c1:32.
nan>
I (120685) nan_app: Received message 'Welcome' from Peer e0:e2:e6:7b:c1:32 [Peer Service id - 5]