88 lines
1.8 KiB
Plaintext
88 lines
1.8 KiB
Plaintext
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RFC : Multi-BroadCast Protocol (MBCP)
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-------------------------------------
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In the case of TEST :
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nothing to say...
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In the case of ABCAST :
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the first datagram (from emiter) contains the real message
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the second datagram (from sites) contains the type/timestamp of the first datagram and
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the new timestamp in the message part
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the last datagram (from emiter) contains the type/timestamp of the first datagram and
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the final official timestamp in the message part
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Datagrams :
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~~~~~~~~~~~
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|------|-----------|---------|
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| Type | Timestamp | Message |
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|------|-----------|---------|
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Type = unsigned char :
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~~~~~~~~~~~~~~~~~~~~~~
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Values:
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- 'T' for test messages
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- 'A' for ABCAST messages
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- 'C' for CBCAST messages
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- _ for unknown messages
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Timestamp :
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~~~~~~~~~~~
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If Type == 'T' then
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No timestamp, empty block, null size...
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If Type == 'A' then
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|------------|-------------|
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| Site index | Clock value |
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|------------|-------------|
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If Type == 'C' then
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|------------|------------|-------------|
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| Site_index | Clock_size | Clock_value |
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|------------|------------|-------------|
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If Type is unknown then
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can't be read, drop packet
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Site_index : unsigned short (16 bits)
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~~~~~~~~~~~~
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Site indexes start at index = 0
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Clock_size : same size than "Site index" (unsigned short 16 bits)
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~~~~~~~~~~~~
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Clock_value :
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~~~~~~~~~~~~~
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If Type = 'A' then
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unsigned short (16 bits)
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If Type = 'C' then
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array of unsigned shorts (16 bits * Clock_size)
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Message :
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~~~~~~~~~
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|--------------|--------------|
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| Message_size | Message_data |
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|--------------|--------------|
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Message_size : unsigned short (16 bits)
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~~~~~~~~~~~~~~
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Message_data :
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~~~~~~~~~~~~~~
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array of unsigned shorts (16 bits * Message_size)
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Notes:
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~~~~~~
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Timestamps start at time = 0
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