[Tinyos-devel] Current status of the message buffer discussion

[Omprakash Gnawali]

I thought option 3 will allow just one encapsulator because it uses a
compile-time flag.

- om_p

On Mon, Jun 1, 2009 at 1:36 PM, Eric Decker <cire831 at gmail.com> wrote:
> These end up with differently formatted headers and thusly need to be
> handled by different encapsulators.
>
> On Mon, Jun 1, 2009 at 10:51 AM, Miklos Maroti <mmaroti at math.u-szeged.hu>
> wrote:
>>
>> My question is, then how far in the networking stack do you want to
>> handle differently the 16-bit and 64-bit addresses?
>>
>> I will come up with more interfaces.
>>
>> Miklos
>>
>> On Mon, Jun 1, 2009 at 3:49 PM, Omprakash Gnawali <gnawali at usc.edu> wrote:
>> > We discussed these interfaces during net2 meeting last week. Option 3
>> > might be problematic because something like blip might need support
>> > for multiple addressing modes.
>> >
>> > - om_p
>> >
>> > On Fri, May 22, 2009 at 2:43 PM, Miklos Maroti
>> > <mmaroti at math.u-szeged.hu> wrote:
>> >> Dear Eric,
>> >>
>> >> You brought up very good points, and I am very happy that others are
>> >> also engaged in the discussion. At this point I am convinced that both
>> >> Jan's and my proposals could be made to work. But to really compare
>> >> the two approaches we need use cases, very well defined used cases.
>> >>
>> >> Just to start the discussion, let me start with IEEE 802.15.4 link
>> >> layer. Here are some options:
>> >>
>> >> ------- Option #1 -------
>> >>
>> >> interface Ieee154Send
>> >> {
>> >>        command error_t send64(uint64_t dest, bool ackReq, message_t*
>> >> msg);
>> >>        command error_t send16(uint16_t dest, bool ackReq, message_t*
>> >> msg);
>> >>        event void sendDone(message_t* msg, error_t error, bool acked);
>> >>        command void* getPayload(message_t* msg, uint8_t len);
>> >> }
>> >>
>> >> interface Ieee154Packet
>> >> {
>> >>        command uint16_t getSource16(message_t* msg);
>> >>        command uint64_t getSource64(message_t* msg);
>> >>        command uint16_t getDestination16(message_t* msg);
>> >>        command uint64_t getDestination64(message_t* msg);
>> >>        // no set commands as this interface should be used only for
>> >> received messages
>> >>
>> >>        command void* getPayload(message_t* msg);
>> >>        command uint8_t getLength(message_t* msg);
>> >> }
>> >>
>> >> ------- Option #2 -------
>> >>
>> >> enum ieee154_flags
>> >> {
>> >>        IEEE154_ACK_REQ = 1 << 0,
>> >>        IEEE154_FRAME_PENDING = 1 << 1,
>> >>        IEEE154_COMPRESS_TO_16BIT = 1 << 2,
>> >> };
>> >>
>> >> interface Ieee154Send
>> >> {
>> >>        command error_t send(uint64_t dest, uint8_t flags, message_t*
>> >> msg,
>> >> void* payload, uint8_t length);
>> >>        event void sendDone(message_t* msg, error_t error, uint8_t
>> >> flags);
>> >>        command void* getPayload(message_t* msg, uint8_t len);
>> >>        command uint8_t getMaxPayload();
>> >> }
>> >>
>> >> interface Ieee154Receive
>> >> {
>> >>        event message_t* receive(uint64_t source, message_t* msg, void*
>> >> payload, uint8_t length);
>> >> }
>> >>
>> >> ------- Option #3 -------
>> >>
>> >> #ifdef USE_64BIT_ADDR
>> >> typedef uint64_t address_t;
>> >> #else
>> >> typedef uint16_t address_t;
>> >> #endif
>> >>
>> >> interface Ieee154Packet
>> >> {
>> >>        command void format(message_t* msg, uint8_t flags);
>> >>
>> >>        command address_t getSource(message_t* msg);
>> >>        command address_t getDestination(message_t* msg);
>> >>        command void setSource(message_t* msg, address_t addr);
>> >>        command void setDestination(message_t* msg, address_t addr);
>> >>
>> >>        command void requestAck(message_t* msg, bool ack);
>> >>        command bool wasAcknowledged(message_t* msg);
>> >>
>> >>        command void* payload(message_t* msg);
>> >>        command uint8_t payloadLength(message_t* msg);
>> >>        command void setPayloadLength(message_t* msg, uint8_t len);
>> >>        command uint8_t maxPayloadLength(message_t* msg);
>> >> }
>> >>
>> >> interface Send
>> >> {
>> >>        command error_t send(message_t* msg);
>> >>        event void sendDone(message_t* msg, error_t error);
>> >> }
>> >>
>> >> interface Receive
>> >> {
>> >>        event message_t* receive(message_t* msg);
>> >> }
>> >>
>> >> Miklos
>> >>
>> >> _______________________________________________
>> >> Tinyos-devel mailing list
>> >> Tinyos-devel at millennium.berkeley.edu
>> >>
>> >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-devel
>> >>
>> >
>>
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>
>
>
> --
> Eric B. Decker
> Senior (over 50 :-) Researcher
> Autonomous Systems Lab
> Jack Baskin School of Engineering
> UCSC
>
>