On Aug 15, 2013, at 12:25 PM, xiong wei <xiongwei@xxxxxxxxx> 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? You can use the deprecated cmsg SCTP_SNDRCV and specify the association id. See http://tools.ietf.org/html/rfc6458#section-5.3.2 I'm not sure if Linux supports the newer cmsg SCTP_SNDINFO yet. See http://tools.ietf.org/html/rfc6458#section-5.3.4 > > And, Does sctp provide a way for server to send msg to all associations > in one syscall ? To send the message on all associations, you can set the SCTP_SENDALL flags. See the above references. I'm not sure if this flag is supported by Linux or not. Best regards Michael > > Thanks. > -- > 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
