From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Sharpe Subject: Radiotap header for S1G captures and associated changes and other definitions Date: Fri, 1 Mar 2019 17:59:58 -0800 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="0000000000000711b3058312e386" Return-path: Sender: radiotap-owner-sUITvd46vNxg9hUCZPvPmw@public.gmane.org List-Unsubscribe: To: radiotap-sUITvd46vNxg9hUCZPvPmw@public.gmane.org, Ray Wang , "Aaron J. Lee" , Tasheng Lin List-Id: radiotap@radiotap.org Archived-At: List-Archive: List-Post: --0000000000000711b3058312e386 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi folks, This is a second attempt at a RADIOTAP header for S1G captures. Aaron Lee did the work in creating these definitions. I simply transcribed = them. The attached patch defines changes to the Channel field, 0-length-MPDU field and a new S1G field. There is also and associated definition for S1G NPD frames, which are 40-bit non-MAC frames transmitted by S1G STAs. I have included the definition of those in this email, and they are essentially from 802.11ah-2016 with a little bit of helpful framing. 1. Channel field: 3 new values for Mask: 0x0002 for 700 MHz, 0x0004 for 800 MHz and 0x0008 for 900 MHz spectrum channels respectively. 2. 0-length MPDU field: 1 new value: 0x02 in the type value: 2 indicates that an S1G NDP 40-bit frame follows. Note, this seems weird. Maybe the name of the field needs changing to non-MAC frame or something. 3. The new S1G frame. It consists of three 16-bit fields: U16 known, U16 data1, U16 data2 Known: 0x0001 S1G PPDU format known 0x0002 Response indication known 0x0004 Guard Interval known 0x0008 NSS known 0x0010 Bandwidth known 0x0020 MCS Known 0x0040 Color known 0xFF80 Reserved Data1: 0x0003: S1G PPDU Format: 0=3DS1G_1M, 1=3DS1G_SHORT, 2=3DS1G_LONG 0x000C: Response indication: 0=3DNO_RESPONSE, 1=3DNDP_RESPONSE, 2=3DNORMAL_RESPONSE, 3=3DLONG_RESPPNSE 0x0010: Reserved 0x0020: Guard interval: 0=3DLong GI, 1=3DShort GI 0x00C0: Number spatial streams: 0=3D1 Spatial stream, 1=3D2, .. 3=3D4 Spati= al streams 0x0F00: Bandwidth: 0=3D1MHz, 1=3D2MHz, 2=3D4MHz, 3=3D8MHz, 4=3D16MHz, 5-15 = reserved 0xF000: MCS (MCS rate index, 0-10, 11-15 reserved) Data2: 0x000F: Color: 0-7 0xFFF0: Reserved The S1G NPD format is essentially from section 9.9 of 802.11ah-2016 with some additional syntactic sugar: It is a 40-bit field. The first 8 bits distinguishes between Management and Control frames using the values 0x0F (management) and 0x20 (control). The last two bits indicates the bandwidth, between 1MHz and 2MHz, In between, a 1MHz NDP CMAC frame contains 26 used bits and 13 unused bits. The used bits are defined in section 9.9 of 802.11ah-2016. A 1MHz NDP CMAC frame contains 37 used bits and one unused bit. Again, the used bits are defined in 802.11ah-2016. --=20 Regards, Richard Sharpe (=E4=BD=95=E4=BB=A5=E8=A7=A3=E6=86=82=EF=BC=9F=E5=94=AF=E6=9C=89=E6=9D=9C= =E5=BA=B7=E3=80=82--=E6=9B=B9=E6=93=8D)(=E4=BC=A0=E8=AF=B4=E6=9D=9C=E5=BA= =B7=E6=98=AF=E9=85=92=E7=9A=84=E5=8F=91=E6=98=8E=E8=80=85) --0000000000000711b3058312e386 Content-Type: application/octet-stream; name="0001-Add-an-S1G-field-and-modify-the-0-length-PSDU-defini.patch" Content-Disposition: attachment; filename="0001-Add-an-S1G-field-and-modify-the-0-length-PSDU-defini.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_jsqu1zti0 RnJvbSBlZjk5MjEzYzcyMzVkNGFmZTAyODMzMWNkMDJiNTJjZGI2YjdiODJmIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBSaWNoYXJkIFNoYXJwZSA8cnNoYXJwZUBsb2NhbGhvc3QubG9j YWxkb21haW4+CkRhdGU6IFRodSwgMzEgSmFuIDIwMTkgMTU6NDc6NTAgLTA4MDAKU3ViamVjdDog W1BBVENIXSBBZGQgYW4gUzFHIGZpZWxkIGFuZCBtb2RpZnkgdGhlIDAtbGVuZ3RoIFBTRFUgZGVm aW5pdGlvbiBmb3IKIFMxRyBORFAgaW5mbyBhcyB3ZWxsIGFzIGFkZCBzb21lIENoYW5uZWwgdmFs 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