From: Michael Tuexen > Sent: 08 September 2017 10:30 > > On 8. Sep 2017, at 11:03, David Laight <David.Laight@xxxxxxxxxx> wrote: > > > > Can anyone think how to create multiple outgoing connections > > from the same subset of local IP addresses and the same port? > > > > We bind() to the first IP address and port, then use > > SCTP_SOCKOPT_BINDX_ADD to add the second IP address. > > But even with IP_REUASADDR set you can't repeat that on > > a second socket. > > > > It is possible to bind a second socket by reversing the > > order of the IP addresses (this might be deemed to be a bug!) > > > > If you bind to IN_ADDR_ANY then a second socket can be bound > > to the same port once the outgoing connection has been made > > (and the actual local address assigned). > > This works for TCP, but for SCTP you almost always need to > > constrain the local addresses advertised on the connection. > > > > Ideas? > Why not use a 1-to-many style socket? Because we don't know until we try to make a connection that the local addresses match an existing one. And it would complicate the code horribly. In principle it could be a completely separate application. (Although in our case it is a kernel M3UA driver.) David -- 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
