`
`
`
`Wi-Fi Peer-to-Peer (P2P)
`
`Technical Specification
`Version 1.7
`
`
` This document is the specification for the Wi-Fi Alliance Wi-Fi CERTIFIED Wi-Fi Direct® program, which
`
`allows Wi-Fi client devices to connect directly without the use of an access point.
`
`
`WI-FI ALLIANCE PROPRIETARY – SUBJECT TO CHANGE WITHOUT NOTICE
`
`This document may be used with the permission of Wi-Fi Alliance under the terms set forth herein.
`
`By your use of the document, you are agreeing to these terms. Unless this document is clearly
`designated as an approved specification, this document is a work in process and is not an approved Wi-Fi
`Alliance specification. This document is subject to revision or removal at any time without notice.
`Information contained in this document may be used at your sole risk. Wi-Fi Alliance assumes no
`responsibility for errors or omissions in this document. This copyright permission does not constitute an
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`Wi-Fi Alliance owns the copyright in this document and reserves all rights therein. A user of this document
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`set forth herein. Unless prior written permission has been received from Wi-Fi Alliance, any other use of
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`
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`
`© 2016 Wi-Fi Alliance. All Rights Reserved.
`Used with the permission of Wi-Fi Alliance under the terms set forth above.
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`Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.7
`
`Document History
`
`Version
`
`Date
`
`Status
`
`Comments
`
`1.0
`
`2009-12-09
`
`Approved for
`Internal
`Release
`
`Peer-to-Peer Technical Specification v1.00
`
`1.1
`
`1.2
`
`2010-10-04
`
`Final
`
`Public release version
`
`2011-12-14
`
`Final
`
`Public release version
`
`- Incorporated changes in 3.1.2.1.2, 3.1.2.1.3, 3.2.2, 3.3.2.2,
`3.3.3.2, 4.1.14, 4.1.16, 4.2.1 (Table 37), 4.2.3 (Table 41) as
`documented in Draft Errata v0-1 for
`WiFi_P2P_Technical_Specification_v1-1.pdf
`
`- Incorporated proposed language for response time
`requirement addition in 3.1.5.1 and 3.2.3
`
`- Incorporated editorial fix to Appendix C (Figure C12)
`
`- Updated WSC Primary Device Type attribute table in
`Appendix B.2 to incorporated new “tablet” sub category (WSC
`v2.0.1).
`
`- Added Display Service Protocol Type in Table 63
`
`1.3
`
`
`
`Draft
`
`Internal draft, not publicly released
`
`1.3.32
`
`2014-01-27
`
`Draft
`
`Draft release version to public
`
`- Updated to support NFC
`
`1.4
`
`2014-03-21
`
`Final
`
`Public release version
`
`- Clarifications on NFC sections
`
`- Updated to incorporate the Wi-Fi Peer-to-Peer Services
`Addendum version 0.7
`
`- Minor editorial corrections/clarifications
`
`1.5
`
`2014-08-04
`
`Final
`
`Public release version
`
`- Editorial updates to clarify references to Wi-Fi Peer-to-Peer
`Services (P2Ps) Specification
`
`1.6
`
`1.7
`
`2016-01-14
`
`Final
`
`Corrected missing reference in section 4.2.11.1
`
`2016-07-06
`
`Final
`
`Public release version
`
`- Updated to incorporate operation in the DMG (60GHz)
`
`© 2016 Wi-Fi Alliance. All Rights Reserved.
`Used with the permission of Wi-Fi Alliance under the terms as stated in this document.
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`Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.7
`
`Table of Contents
`
`1
`
`Introduction ............................................................................................................ 13
`
`1.1
`
`1.2
`
`1.3
`
`1.4
`
`1.5
`
`Overview .................................................................................................. 13
`
`Scope....................................................................................................... 13
`
`References .............................................................................................. 13
`
`Definitions ................................................................................................ 14
`
`Abbreviations and acronyms .................................................................... 16
`
`2 Architectural overview ............................................................................................ 19
`
`2.1
`
`2.2
`
`2.3
`
`2.4
`
`P2P components ..................................................................................... 19
`
`P2P topology ........................................................................................... 19
`
`Concurrent operation ............................................................................... 21
`
`Functions and services ............................................................................ 22
`
`2.4.1
`
`Basic functions and services .................................................................... 22
`
`2.4.2
`
`P2P specific functions and services ......................................................... 23
`
`2.4.3
`
`P2P Device addressing............................................................................ 23
`
`3
`
`Functional description and procedures .................................................................. 25
`
`3.1
`
`P2P discovery .......................................................................................... 25
`
`3.1.1
`
`Introduction .............................................................................................. 25
`
`3.1.2
`
`Device Discovery procedures .................................................................. 25
`
`3.1.3
`
`Service Discovery procedures ................................................................. 38
`
`3.1.4
`
`Group Formation procedure ..................................................................... 44
`
`3.1.5
`
`P2P Invitation procedure .......................................................................... 54
`
`3.2
`
`P2P Group operation ............................................................................... 58
`
`3.2.1
`
`P2P Group ID .......................................................................................... 59
`
`3.2.2
`
`Starting and maintaining a P2P Group session ....................................... 59
`
`3.2.3
`
`Connecting to a P2P Group ..................................................................... 61
`
`3.2.4
`
`P2P Group Owner services for P2P Client discovery .............................. 62
`
`3.2.5
`
`Persistent Group operation ...................................................................... 64
`
`3.2.6
`
`Communication in a P2P Group .............................................................. 66
`
`3.2.7
`
`Disconnecting from a P2P Group ............................................................ 69
`
`3.2.8
`
`Disconnecting a P2P Client ..................................................................... 69
`
`© 2016 Wi-Fi Alliance. All Rights Reserved.
`Used with the permission of Wi-Fi Alliance under the terms as stated in this document.
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`3.2.9
`
`Ending a P2P Group session ................................................................... 70
`
`3.3
`
`P2P Power Management ......................................................................... 70
`
`3.3.1
`
`Introduction .............................................................................................. 70
`
`3.3.2
`
`Power Management and discovery .......................................................... 71
`
`3.3.3
`
`Power Management at a P2P Group Owner ............................................ 72
`
`3.3.4
`
`Power Management at a P2P Client ........................................................ 79
`
`3.4
`
`Managed P2P Device operations ............................................................ 83
`
`3.4.1 Managed P2P Device capability .............................................................. 83
`
`3.4.2
`
`P2P Coexistence Parameters operations ................................................ 84
`
`3.4.3 WLAN Deauthentication/Disassociation................................................... 86
`
`3.4.4 Managed P2P Device Summary .............................................................. 87
`
`4
`
`Frame formats ........................................................................................................ 89
`
`4.1
`
`P2P Information Element ......................................................................... 89
`
`4.1.1
`
`P2P IE format .......................................................................................... 89
`
`4.1.2
`
`Status attribute ......................................................................................... 92
`
`4.1.3 Minor Reason Code attribute ................................................................... 93
`
`4.1.4
`
`P2P Capability attribute ........................................................................... 94
`
`4.1.5
`
`P2P Device ID attribute............................................................................ 97
`
`4.1.6
`
`Group Owner Intent attribute ................................................................... 97
`
`4.1.7
`
`Configuration Timeout attribute ................................................................ 98
`
`4.1.8
`
`Listen Channel attribute ........................................................................... 98
`
`4.1.9
`
`P2P Group BSSID attribute ..................................................................... 99
`
`4.1.10 Extended Listen Timing attribute ........................................................... 100
`
`4.1.11
`
`Intended P2P Interface Address attribute .............................................. 100
`
`4.1.12 P2P Manageability attribute ................................................................... 101
`
`4.1.13 Channel List attribute ............................................................................. 102
`
`4.1.14 Notice of Absence attribute .................................................................... 103
`
`4.1.15 P2P Device Info attribute ....................................................................... 105
`
`4.1.16 P2P Group Info attribute ........................................................................ 106
`
`4.1.17 P2P Group ID attribute........................................................................... 107
`
`4.1.18 P2P Interface attribute ........................................................................... 108
`
`4.1.19 Operating Channel attribute ................................................................... 108
`
`4.1.20
`
`Invitation Flags attribute ......................................................................... 109
`
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`Used with the permission of Wi-Fi Alliance under the terms as stated in this document.
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`4.1.21 Out-of-Band Group Owner Negotiation Channel attribute...................... 110
`
`4.1.22 Service Hash attribute............................................................................ 111
`
`4.1.23 Session Information Data Info ................................................................ 111
`
`4.1.24 Connection Capability Info attribute ....................................................... 112
`
`4.1.25 Advertisement ID Info attribute .............................................................. 112
`
`4.1.26 Advertised Service Info attribute ............................................................ 113
`
`4.1.27 Session ID Info attribute......................................................................... 114
`
`4.1.28 Feature Capability Info attribute ............................................................. 115
`
`4.1.29 Persistent Group Info attribute ............................................................... 115
`
`4.2
`
`Management Frames ............................................................................. 116
`
`4.2.1
`
`Beacon frame format ............................................................................. 116
`
`4.2.2
`
`Probe Request frame format .................................................................. 117
`
`4.2.3
`
`Probe Response frame format ............................................................... 118
`
`4.2.4
`
`Association/Reassociation Request frame format ................................. 119
`
`4.2.5
`
`Association/Reassociation Response frame format ............................... 120
`
`4.2.6
`
`Deauthentication frame format ............................................................... 120
`
`4.2.7
`
`Disassociation frame format .................................................................. 121
`
`4.2.8
`
`IP Address Allocation in EAPOL-Key Frames (4-Way Handshake) ....... 121
`
`4.2.9
`
`P2P public action frames ....................................................................... 122
`
`4.2.10 P2P action frames ................................................................................. 132
`
`4.2.11 Service Discovery action frames ............................................................ 134
`
`4.2.12 FST action frames ................................................................................. 137
`
`4.3
`
`DMG Frames ......................................................................................... 137
`
`4.3.1
`
`DMG Beacon and Announce frame format ............................................ 137
`
`4.3.2
`
`Information request frame format ........................................................... 138
`
`4.3.3
`
`Information response frame format ........................................................ 139
`
`4.4
`
`4.5
`
`Frame Usage ......................................................................................... 139
`
`NFC NDEF Structure ............................................................................. 142
`
`4.5.1
`
`NFC P2P Handover Request Message ................................................. 142
`
`4.5.2
`
`NFC P2P Handover Select Message ..................................................... 145
`
`Appendix A P2P State Machine .................................................................................. 148
`
`Appendix B P2P Specific WSC IE Attributes ............................................................... 157
`
`B.1
`
`Requested Device Type......................................................................... 157
`
`© 2016 Wi-Fi Alliance. All Rights Reserved.
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`B.2
`
`Primary Device Type.............................................................................. 158
`
`Appendix C GAS Frame Field Value ........................................................................... 159
`
`C.1
`
`C.2
`
`C.3
`
`GAS Initial Request action frame ........................................................... 159
`
`GAS Initial Response Action Frame ...................................................... 161
`
`GAS Fragmentation ............................................................................... 163
`
`Appendix D P2P Discovery Diagrams ......................................................................... 167
`
`Appendix E Recommended Practices for Bonjour using Wi-Fi P2P Service Discovery
`
`184
`
`E.1
`
`E.2
`
`E.3
`
`E.4
`
`Example for Apple File Sharing over TCP ............................................. 186
`
`Example for IP Printing over TCP .......................................................... 189
`
`DNS Name Compression ....................................................................... 192
`
`Supported Service Type Hash (SSTH) .................................................. 193
`
`Appendix F Recommended Practices for UPnP using Wi-Fi P2P Service Discovery . 195
`
`F.1
`
`F.2
`
`F.3
`
`Example 1—Search for UPnP internet gateway devices ....................... 197
`
`Example 2—Search for all UPnP root devices ....................................... 198
`
`Example 3—Search for a specific device by its UUID ........................... 198
`
`Example 4—Search for all instances of a UPnP Media Server Content
`F.4
`Directory Service ..................................................................................................... 199
`
`Appendix G Recommended Practices for Peer-to-Peer Services (P2Ps) using P2P
`Service Discovery........................................................................................................ 200
`
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`Used with the permission of Wi-Fi Alliance under the terms as stated in this document.
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`Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.7
`
`Figures
`
`Figure 1—P2P components and topology when operating outside DMG...................... 20
`
`Figure 2—P2P components and topology when operating within DMG ........................ 20
`
`Figure 3—A subset of P2P 1:n topology (n=1) .............................................................. 21
`
`Figure 4—P2P Concurrent device ................................................................................. 21
`
`Figure 5—Example In-band Device Discovery procedures for a P2P Device operating
`outside DMG ................................................................................................................. 31
`
`Figure 6—Example In-band Device Discovery procedures for a P2P Device operating
`within DMG .................................................................................................................... 32
`
`Figure 7—Out-of-Band Device Discovery (NFC Negotiated Handover) ........................ 36
`
`Figure 8—Out-of-Band Device Discovery (NFC Static Handover) ................................ 38
`
`Figure 9—Example of Service Discovery procedure when operating outside DMG ...... 43
`
`Figure 10—Example of Service Discovery procedure when operating within DMG ...... 44
`
`Figure 11—Group Owner Negotiation message exchange ........................................... 47
`
`Figure 12—Group Owner determination flowchart ........................................................ 48
`
`Figure 13—Example of Group Formation using NFC Out-of-Band Device Discovery ... 54
`
`Figure 14—Example of P2P Group Owner Opportunistic Power Save ......................... 73
`
`Figure 15—P2P Group Owner Notice of Absence ........................................................ 75
`
`Figure 16—P2P Group Owner Notice of Absence with Opportunistic Power Save ....... 77
`
`Figure 17—Illustration of P2P Group Owner power save state precedence rules ......... 78
`
`Figure 18—Example P2P WMM-PS operation with P2P Group Owner NoA ................ 80
`
`Figure 19—Shortening of P2P WMM-PS USPs by P2P Group Owner absence ........... 81
`
`Figure 20—P2P Presence Request-Response procedure ............................................ 82
`
`Figure 21—Managed P2P Device that is a P2P Concurrent Device ............................. 84
`
`Figure 22—Example of P2P attributes carried in two P2P IEs ...................................... 92
`
`Figure 23—NFC P2P Handover Request Message .................................................... 143
`
`Figure 24—NFC P2P Handover Select Message ....................................................... 146
`
`Figure A1—P2P State Machine .................................................................................. 149
`
`Figure C1—GAS Initial Request Action Frame Format ............................................... 159
`
`Figure C2—Advertisement Protocol Information Element ........................................... 159
`
`Figure C3—ANQP Query Request Field ..................................................................... 160
`
`Figure C4—ANQP Query Request Frame Vendor-specific Content ........................... 160
`
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`Figure C5—GAS Initial Response Action Frame Format ............................................ 161
`
`Figure C6—Advertisement Protocol Information Element ........................................... 162
`
`Figure C7—ANQP Query Response Field Format ...................................................... 162
`
`Figure C8—ANQP Query Response Frame Vendor-specific Content Field ................ 163
`
`Figure C9—GAS Comeback Request Frame Format ................................................. 164
`
`Figure C10—GAS Comeback Response Frame Format ............................................. 164
`
`Figure C11—Advertisement Protocol IE ...................................................................... 165
`
`Figure C12—Example GAS Fragmentation Frame Exchange Sequence ................... 166
`
`Figure E1—Query Request Vendor-specific Content .................................................. 184
`
`Figure E2—Bonjour Query Data ................................................................................. 184
`
`Figure E3—Query Response Vendor-specific Content ............................................... 185
`
`Figure E4—Response Data ........................................................................................ 185
`
`Figure E5—AFP Over TCP Query Data (human readable) ......................................... 186
`
`Figure E6—AFP Over TCP Query Data (encoded and compressed).......................... 187
`
`Figure E7—AFP over TCP Response Data (human readable) ................................... 187
`
`Figure E8—AFP over TCP Response Data (encoded and compressed) .................... 187
`
`Figure E9—AFP Over TCP Query Data for Example (human readable) ..................... 188
`
`Figure E10—AFP Over TCP Query Data for Example (encoded and compressed) ... 188
`
`Figure E11—AFP over TCP Response Data for Example (human readable) ............. 188
`
`Figure E12—AFP over TCP Response Data for Example (encoded and compressed)
` .................................................................................................................................... 189
`
`Figure E13—IPP Over TCP Query Data (human readable) ........................................ 189
`
`Figure E14—IPP Over TCP Query Data (encoded and compressed) ......................... 189
`
`Figure E15—IPP over TCP Response Data (human readable) .................................. 190
`
`Figure E16—IPP over TCP Response Data (encoded and compressed) ................... 190
`
`Figure E17—IPP Over TCP Query Data for MyPrinter (human readable)................... 191
`
`Figure E18—IPP Over TCP Query Data for MyPrinter (encoded and compressed) ... 191
`
`Figure E19—IPP over TCP Response Data for MyPrinter (human readable) ............. 191
`
`Figure E20—IPP over TCP Response Data for MyPrinter (encoded and compressed)
` .................................................................................................................................... 192
`
`Figure F1—Vendor-specific Content in ANQP Query Request ................................... 196
`
`Figure F2—Vendor-specific content in ANQP Query Response ................................. 196
`
`Figure F3—Query Data ............................................................................................... 196
`
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`Figure F4—Response Data ......................................................................................... 196
`
`Figure F5—Query Request for UPnP Internet Gateway Devices ................................ 198
`
`Figure F6—Query Response for UPnP Internet Gateway Devices ............................. 198
`
`Figure F7—Query Request for all UPnP root devices ................................................. 198
`
`Figure F8—Query Response for all UPnP root devices .............................................. 198
`
`Figure F9—Query Request for a UPnP device by its UUID ........................................ 199
`
`Figure F10—Query Response for a UPnP device by its UUID .................................... 199
`
`Figure F11—Query Request for all instances of a UPnP Media Server CDS ............. 199
`
`Figure F12—Query Response for all instances of a UPnP Media Server CDS ........... 199
`
`
`
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`Used with the permission of Wi-Fi Alliance under the terms as stated in this document.
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`Wi-Fi Peer-to-Peer (P2P) Technical Specification v1.7
`
`Tables
`
`Table 1—Summary of WSC Config Methods and Device Password ID usage ............. 46
`
`Table 2—P2P Coexistence Parameters setting ............................................................ 85
`
`Table 3—Summary of requirements on Managed P2P Devices ................................... 87
`
`Table 4—P2P IE format ................................................................................................ 89
`
`Table 5—General format of P2P attribute ..................................................................... 90
`
`Table 6—P2P Attribute ID definitions ............................................................................ 90
`
`Table 7—Status attribute format ................................................................................... 92
`
`Table 8—Status Code definitions .................................................................................. 93
`
`Table 9—Minor Reason Code attribute format .............................................................. 93
`
`Table 10—Minor Reason Code definitions .................................................................... 94
`
`Table 11—P2P Capability attribute format .................................................................... 94
`
`Table 12—Device Capability Bitmap definition .............................................................. 95
`
`Table 13—Group Capability Bitmap definition ............................................................... 95
`
`Table 14—P2P Device ID attribute format .................................................................... 97
`
`Table 15—Group Owner Intent attribute format ............................................................ 97
`
`Table 16—GO Intent field definition .............................................................................. 98
`
`Table 17—Configuration Timeout attribute format ........................................................ 98
`
`Table 18—Listen Channel attribute format .................................................................... 99
`
`Table 19—P2P Group BSSID attribute format .............................................................. 99
`
`Table 20—Extended Listen Timing attribute format .................................................... 100
`
`Table 21—Intended P2P Interface Address attribute format ....................................... 100
`
`Table 22—P2P Manageability attribute format ............................................................ 101
`
`Table 23—Manageability Bitmap field format .............................................................. 101
`
`Table 24—Channel List attribute format ...................................................................... 102
`
`Table 25—Channel Entry field format ......................................................................... 102
`
`Table 26—Notice of Absence attribute format ............................................................. 103
`
`Table 27— CTWindow and OppPS Parameters field format ....................................... 104
`
`Table 28—Notice of Absence Descriptor format ......................................................... 104
`
`Table 29—Device Info attribute format ........................................................................ 105
`
`Table 30—P2P Group Info attribute format ................................................................. 106
`
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`Table 31—P2P Client Info Descriptor format .............................................................. 106
`
`Table 32—P2P Group ID attribute format ................................................................... 107
`
`Table 33—P2P Interface attribute format .................................................................... 108
`
`Table 34—Operating Channel attribute format ............................................................ 108
`
`Table 35—Invitation Flags attribute format .................................................................. 109
`
`Table 36—Invitation Flags Bitmap definition ............................................................... 109
`
`Table 37— Out-of-Band Group Owner Negotiation Channel attribute format ............. 110
`
`Table 38— Role indication field ................................................................................... 110
`
`Table 39 – Service Hash attribute format .................................................................... 111
`
`Table 40 - Session Information Data Info attribute format ........................................... 112
`
`Table 41 - Connection Capability Info attribute format ................................................ 112
`
`Table 42 - Advertisement ID Info attribute format ........................................................ 113
`
`Table 43 - Advertised Service Info Attribute format ..................................................... 114
`
`Table 44 - Advertised Service Descriptor format ......................................................... 114
`
`Table 45 - Session ID Info Attribute definitions ........................................................... 115
`
`Table 46 - Feature Capability Info attribute format ...................................................... 115
`
`Table 47 - Persistent Group Info Attribute format ........................................................ 116
`
`Table 48—P2P attributes in the Beacon frame ........................................................... 116
`
`Table 49—Probe Request frame format ...................................................................... 117
`
`Table 50—Additional attributes in WSC IE in the Probe Request frame ..................... 117
`
`Table 51—P2P attributes in the Probe Request frame................................................ 118
`
`Table 52—P2P attributes in the Probe Response frame ............................................. 118
`
`Table 53—P2P attributes in the Association/Reassociation Request frame ............... 119
`
`Table 54—P2P attributes in the Association/Reassociation Request frame sent to a
`WLAN AP by a Managed P2P Device ......................................................................... 120
`
`Table 55—P2P attributes in the Association/Reassociation Response frame ............. 120
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`Table 56—P2P attributes in the Deauthentication frame............................................. 120
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`Table 57—P2P attributes in the Disassociation frame ................................................ 121
`
`Table 58—IP Address Request KDE in the EAPOL-Key frame 2 ............................... 121
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`Table 59—IP Allocation KDE in the EAPOL-Key frame 3 ........................................... 122
`
`Table 60—General format of P2P public action frame ................................................ 122
`
`Table 61—P2P public action frame type .....................................