Messages in this thread | | | Date | Fri, 13 Dec 2002 10:07:01 -0800 | From | Nivedita Singhvi <> | Subject | Re: R: Kernel bug handling TCP_RTO_MAX? |
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Andrew McGregor wrote:
> In a closed network, why not have SOCK_STREAM map to something faster than > TCP anyway? That is, if I connect(address matching localnet), SOCK_STREAM > maps to (eg) SCTP. That would be a far more dramatic performance hack! > > Andrew
Not that simple. SCTP (if that is what Matti was referring to) is a SOCK_STREAM socket, with a protocol of IPPROTO_SCTP. I'm just getting done implementing a testsuite against the SCTP API.
i.e. You have to know you want an SCTP socket at the time you open the socket. You certainly have no idea whether youre on a closed network or not, for that matter, the app may want to talk on multiple interfaces etc. (Most hosts will have one interface on a public net)..
Currently, Linux SCTP doesn't yet support TCP style i.e SOCK_STREAM sockets, we only do udp-style sockets (SOCK_SEQPACKET). We will be putting in SOCK_STREAM support next, but understand that performance is not something that has been addressed yet, and a performant SCTP is still some ways away (though I'm sure Jon and Sridhar will be working their tails off to do so ;)).
But dont expect SCTP to be the surreptitious underlying layer carrying TCP traffic, if thats an expectation that anyone has :)
Solving this problem without application involvement is a more limited scenario..
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