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.. thanks, Nivedita - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
