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sctp_plpmtud_ipv6_1500_optbinary_1492_hc.pkt
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sctp_plpmtud_ipv6_1500_optbinary_1492_hc.pkt
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--tolerance_usecs=100000
--ip_version=ipv6
--mtu=1500
0.0 `sysctl -i net.inet.sctp.initial_cwnd=10`
0.0 `sysctl -i net.inet.sctp.plpmtud_enable=1`
0.0 `sysctl -i net.inet.sctp.plpmtud_ipv6_min_mtu=1280`
0.0 `sysctl -i net.inet.sctp.plpmtud_search_algorithm=2` // OptBinary
0.0 `sysctl -i net.inet.sctp.plpmtud_max_probes=3`
0.0 `sysctl -i net.inet.sctp.plpmtud_min_probe_rtx_time=1000`
0.0 `sysctl -i net.inet.tcp.hostcache.purgenow=1`
// Normal PMTU search...
// Create a non-blocking 1-to-1 style socket
+0.0 socket(..., SOCK_STREAM, IPPROTO_SCTP) = 3
+0.0 fcntl(3, F_SETFL, O_RDWR | O_NONBLOCK) = 0
+0.0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
// Trigger the active associtation setup
+0.0 > sctp: INIT[flgs=0, tag=1, a_rwnd=..., os=..., is=..., tsn=1, ...]
+0.1 < sctp: INIT_ACK[flgs=0, tag=2, a_rwnd=99999, os=1, is=1, tsn=1, STATE_COOKIE[len=4, val=...]]
+0.0 > sctp: COOKIE_ECHO[flgs=0, len=..., val=...]
+0.1 < sctp: COOKIE_ACK[flgs=0]
// Check if the setup was sucessful
+0.0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
// probe for 1280
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1180, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1500
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1400, val=...]
// fails
// probe for 1392
+0.215 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1292, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1448
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1348, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1476
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1376, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1488
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1388, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1496
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1396, val=...]
// fails
// probe for 1492
+0.134 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1392, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1496
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1396, val=...]
// fails
// probe for 1496
+0.130 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1396, val=...]
// fails
+2.0 close(3) = 0
//Shutdown
+0.0 > sctp: SHUTDOWN[flgs=0, cum_tsn=0]
+0.0 < sctp: SHUTDOWN_ACK[flgs=0]
+0.0 > sctp: SHUTDOWN_COMPLETE[flgs=...]
// Another PMTU search with 1492 B stored in hostcache.
// Create a non-blocking 1-to-1 style socket
+0.0 socket(..., SOCK_STREAM, IPPROTO_SCTP) = 3
+0.0 fcntl(3, F_SETFL, O_RDWR | O_NONBLOCK) = 0
+0.0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
// Trigger the active associtation setup
+0.0 > sctp: INIT[flgs=0, tag=1, a_rwnd=..., os=..., is=..., tsn=1, ...]
+0.1 < sctp: INIT_ACK[flgs=0, tag=2, a_rwnd=99999, os=1, is=1, tsn=1, STATE_COOKIE[len=4, val=...]]
+0.0 > sctp: COOKIE_ECHO[flgs=0, len=..., val=...]
+0.1 < sctp: COOKIE_ACK[flgs=0]
// Check if the setup was sucessful
+0.0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
// probe for 1280
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1180, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
// probe for 1492
+0.000 > sctp: HEARTBEAT[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]];
PAD[flgs=0, len=1392, val=...]
+0.100 < sctp: HEARTBEAT_ACK[flgs=0, HEARTBEAT_INFORMATION[len=..., val=...]]
+2.0 close(3) = 0
//Shutdown
+0.0 > sctp: SHUTDOWN[flgs=0, cum_tsn=0]
+0.0 < sctp: SHUTDOWN_ACK[flgs=0]
+0.0 > sctp: SHUTDOWN_COMPLETE[flgs=...]