FM_MixA3A2A1.seq - Fragmented DATA chunks are received for reassembly (A3->A2->A1)
To check that if fragmented DATA chunks arrive out of order of their
TSN, the endpoint MUST hold the received DATA chunks from delivery
to the ULP until they are reassembly.
./FM_MixA3A2A1.seq [-tooloption ...] -pkt ./FM_MixA3A2A1.def
-tooloption : v6eval tool option
See Also: ../common/STD_PKT_COMMON.def
../common/SCTP_COMMON.def
Association is established between endpoint A and B. Arrange data
in endpoint A such that fragmented DATA messages are sent to
endpoint B for reassembly.
Endpoint A Endpoint B ULP
(ESTABLISHED) (ESTABLISHED)
DATA A3 ---------------->
[TSN=2, B=0, E=1]
<---------------- SACK
DATA A2 ---------------->
[TSN=1, B=0, E=0]
<---------------- SACK
DATA A1 ---------------->
[TSN=0, B=1, E=0]
<---------------- SACK
DATA Arrive ----->
<---------------- DATA (ECHO of A1, A2 and A3)
SACK ---------------->
TEST DESCRIPTION:
1. Send DATA A3 from endpoint A to B with B=0, E=1.
2. Check A: DATA A3 is not delivered to the ULP.
3. Send DATA A2 from endpoint A to B with B=0, E=0.
4. Check B: DATA A2 is not delivered to the ULP.
5. Send DATA A1 from endpoint A to B with B=1, E=0.
6. Check C: DATA A1, A2 and A3 is delivered to the ULP
after reassemble and be send back.
None
RFC 4960
6.9. Fragmentation and Reassembly
An endpoint MUST recognize fragmented DATA chunks by examining the
B/E bits in each of the received DATA chunks, and queue the
fragmented DATA chunks for reassembly. Once the user message is
reassembled, SCTP shall pass the reassembled user message to the
specific stream for possible reordering and final dispatching.
Note: If the data receiver runs out of buffer space while still
waiting for more fragments to complete the reassembly of the message,
it should dispatch part of its inbound message through a partial
delivery API (see Section 10), freeing some of its receive buffer
space so that the rest of the message may be received.