add testcase for add_incoming_streams

gtests/net/packetdrill/tests/bsd/sctp/sctp_reconfig/add_incoming_streams.pkt

+--tolerance_usecs=100000
+
+// Create a non-blocking 1-to-1 style socket
+ 0.0 socket(..., SOCK_STREAM, IPPROTO_SCTP) = 3
++0.0 fcntl(3, F_GETFL) = 0x02 (flags O_RDWR)
++0.0 fcntl(3, F_SETFL, O_RDWR | O_NONBLOCK) = 0
+
++0.0 setsockopt(3, IPPROTO_SCTP, SCTP_ENABLE_STREAM_RESET, {assoc_id=3, assoc_value=SCTP_ENABLE_RESET_STREAM_REQ}, 8) = 0
++0.0 getsockopt(3, IPPROTO_SCTP, SCTP_ENABLE_STREAM_RESET, {assoc_id=3, assoc_value=SCTP_ENABLE_RESET_STREAM_REQ}, [8]) = 0
+
+// Trigger the active associtation setup
++0.1 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
++0.0 > sctp: INIT[flgs=0, tag=1, a_rwnd=..., os=..., is=..., tsn=1, ...]
++0.0 < sctp: INIT_ACK[flgs=0, tag=2, a_rwnd=1500, os=1, is=1, tsn=1, STATE_COOKIE[len=4, val=...], SUPPORTED_EXTENSIONS[types=[0x82]]]
++0.0 > sctp: COOKIE_ECHO[flgs=0, len=4, val=...]
++0.0 < sctp: COOKIE_ACK[flgs=0]
+
+// Check if the setup was sucessful
++0.0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
+// Generate some traffic so the tsn and ssn increase
++0.0 write(3, ..., 1000) = 1000
++0.0 > sctp: DATA[flgs=BE, len=1016, tsn=1, sid=0, ssn=0, ppid=0]
++0.0 < sctp: SACK[flgs=0, cum_tsn=1, a_rwnd=1500, gaps=[], dups=[]]
+
++0.0 write(3, ..., 1000) = 1000
++0.0 > sctp: DATA[flgs=BE, len=1016, tsn=2, sid=0, ssn=1, ppid=0]
++0.0 < sctp: SACK[flgs=0, cum_tsn=2, a_rwnd=1500, gaps=[], dups=[]]
+
+// Reset Stream 0
++0.0 setsockopt(3, IPPROTO_SCTP, SCTP_ADD_STREAMS, {sas_assoc_id=3,
+                                                      sas_instrms=10,
+						      sas_outstrms=0}, 8) = 0
++0.0 > sctp: RECONFIG[flgs=0, ADD_INCOMING_STREAMS[req_sn=1, number_of_new_streams=10]]
+
++1.0 close(3) = 0