hcidump iconsistent byte ordering?

HCI Event: Command Status (0x0f) plen 4

let's say I want to decipher the first two HCI events from the "hcitool inq" dump:
< HCI Command: Inquiry (0x01|0x0001) plen 5
33 8B 9E 08 64

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

00 01 01 04

Easily, the first one is the Inquiry command. Its command parameters are specified (Bluetooth Specification 1.1) in this order: LAP, Inquiry_Length, Num_Responses; so from the hcidump output we have:

	LAP: 0x9E8B33 (general inquiry LAP)
	Inquiry_Length: 0x08
	Num_Responses: 0x64

so far so good; it makes sense, but how about the command status event? the order of its event parameters from the specification is: Status, Num_HCI_Command_Packets, Command_Opcode. So following the same procedure
as before I would get:

	Status: 0x00
	Num_HCI_Command_Packets: 0x01
	Command_Opcode: 0x0401

but this doesn't make sense because Command_Opcode should be 0x0001 (Inquiry command). These bytes are now located as the two first bytes of the output, and the reading order is different from that of LAP's order in the Inquiry Command.

So, I'm asking, how must I read hcidump output in order to agree with the specification?

Hi Luis,

Quoted 15 lines

let's say I want to decipher the first two HCI events from the "hcitool inq" dump:
< HCI Command: Inquiry (0x01|0x0001) plen 5
33 8B 9E 08 64

Quoted 1 line

HCI Event: Command Status (0x0f) plen 4

00 01 01 04

Easily, the first one is the Inquiry command. Its command parameters are specified (Bluetooth Specification 1.1) in this order: LAP, Inquiry_Length, Num_Responses; so from the hcidump output we have:

	LAP: 0x9E8B33 (general inquiry LAP)
	Inquiry_Length: 0x08
	Num_Responses: 0x64

so far so good; it makes sense, but how about the command status event? the order of its event parameters from the specification is: Status, Num_HCI_Command_Packets, Command_Opcode. So following the same procedure
as before I would get:

Quoted 7 lines

	Status: 0x00
	Num_HCI_Command_Packets: 0x01
	Command_Opcode: 0x0401

but this doesn't make sense because Command_Opcode should be 0x0001 (Inquiry command). These bytes are now located as the two first bytes of the output, and the reading order is different from that of LAP's order in the Inquiry Command.

So, I'm asking, how must I read hcidump output in order to agree with the specification?

the command opcode consists of OGF and OCF. Look at the specification on how to encode them into the command opcode.

Regards

Marcel

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