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Type:
New Feature
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Status: Resolved
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Priority:
Major
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Resolution: Not a Bug
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Affects Version/s: None
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Fix Version/s: None
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Component/s: inet
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Labels:None
Changes for Linux kernel 5.5 in SCTP driver exposes events addr_added, addr_made_prim, addr_removed, send_failed_event
https://kernelnewbies.org/Linux_5.5#Networking
Reproduce:
Starting a SCTP server for instance the one specified in http://erlang.org/doc/man/gen_sctp.html#sctp-examples
Try to start the client.
-> Fails with
{error,{{127,0,0,1},
2006,[],
{sctp_paddr_change,{{127,0,0,1},2006},addr_added,0,0}}}
Example:
2> {ok, Server} = gen_sctp:open().
{ok,#Port<0.7>}
3> ok = gen_sctp:listen(Server, true).
ok
4> {ok, Port} = inet:port(Server).
{ok,49542}
5>
5> {ok, Client} = gen_sctp:open().
{ok,#Port<0.8>}
6> gen_sctp:connect(Client, "localhost", Port, []).
{error,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{127,0,0,1},49542},
state = addr_added,error = 0,assoc_id = 0}}}
7> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{127,0,0,1},49542},
state = addr_made_prim,error = 0,assoc_id = 0}}}
8> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{127,0,0,1},49542},
state = addr_made_prim,error = 0,assoc_id = 0}}}
9> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{192,168,0,3},49542},
state = addr_added,error = 0,assoc_id = 0}}}
10> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{172,17,0,1},49542},
state = addr_added,error = 0,assoc_id = 0}}}
11> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_paddr_change{addr = {{127,0,0,1},49542},
state = addr_made_prim,error = 0,assoc_id = 62393}}}
12> prim_inet:recvfrom(Client, 0, 1000).
{ok,{{127,0,0,1},
49542,[],
#sctp_assoc_change{state = comm_up,error = 0,
outbound_streams = 10,inbound_streams = 10,
assoc_id = 62393}}}
https://github.com/erlang/otp/blob/master/lib/kernel/src/inet_sctp.erl#L109
