Stack Organization
Overview
Protocol layers are wired together to form a stack. Click on the image to the right to see the stack organization diagram of the OpenWSN protocol stack. Send functions are used to push packets down the stack; Receive functions to pull them up. The bytes of a packet live in the OpenQueue component. A packet is a variable of type OpenQueueEntry_t and is defined in openwsn.h; components pass a pointer to an OpenQueueEntry_t variables in the Send and Receive functions.
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| App | L4 | RPL | IPHC | RES | MAC | drivers |
creator | w |
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owner | w | w | w | w | w | ww |
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l4_protocol | w/r |
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l4_source_port | w | r |
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l4_destination_port | w | r |
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l4_payload |
| w/r |
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l4_length |
| w/r |
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l3_destinationORsource | w |
| r | r |
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l2_nextORpreviousHop |
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| w |
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| r |
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l2_frameType |
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| w | r |
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l2_retriesLeft |
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| w/r |
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l1_txPower |
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| w | r |
l1_channel |
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| w | r |
l1_rssi |
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l1_lqi |
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l1_crc |
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l1_rxTimestamp |
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