On Thu, Aug 15, 2013 at 05:13:10PM +0200, Michael Tuexen wrote: > On Aug 15, 2013, at 1:42 PM, Daniel Borkmann <dborkman@xxxxxxxxxx> wrote: > > > On 08/15/2013 12:25 PM, xiong wei wrote: > >> Hi, experts > >> > >> For one-to-many mode. Suppose I have a socket which contain several > >> associations in it. that means there are several clients connect with > >> server. > >> > >> If I use sendmsg(...) function to send msg from server, How does sctp > >> identify which association will receive the data? Does all clients will > >> receive the msg? > >> > >> And, Does sctp provide a way for server to send msg to all associations > >> in one syscall ? > > > > Neil Horman wrote: > > > > The receiving association is specified in either the msg_name field of the > Can you specify on Linux an sctp_assoc_t? Or would you specify one of the > remote IP addresses? Specifying an sctp_assoc_t would be Linux specific, > I guess. At least this isn't covered by > http://tools.ietf.org/html/rfc6458 > as far as I know. > Its a sockaddr structure that is used in the lookup of sctp_sendmsg, so It should be a peer ip address (either v4 or v6) Neil > Best regards > Michael > > message header or the association id field of the sndrcv_info cmsg header in the > > datagram. IIRC there is no was to send to all associations at once in a single > > syscall, unless you want to marshall up all the data and pass it down via the > > sendmmsg syscall, which I don't think lksctp-tools supports yet (though that > > would be a nice feature). > > Neil > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-sctp" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-sctp" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
