On Wed, Jul 24, 2019 at 02:46:09PM +0100, Luci Stanescu wrote: > Hi, Hi, > > I’m not sure this is the right place to ask this kind of question, > but, having not found a better forum, I’m trying my luck. Apologies Considering you're programming for Linux, it is. :-) > in advance if this is outside the scope of the mailing list. > > That being said, my question is: given a successful return of > recvmsg() for a SOCK_SEQPACKET SCTP socket, is there no stateless > way to determine if the read data, for which the MSG_EOR flag is > set, is the trailing “fragment” of a larger record (either due to > partial delivery or an insufficient buffer passed to a prior call to > recvmsg() which returned with the MSG_EOR flag cleared), rather than > a “full” message? Stateless, I'm not aware of a way. We do have SCTP_PARTIAL_DELIVERY_EVENT, though, and RCVINFO. But these would require some state to be preserved. MSG_PEEK also, but also requires some state. > > From what I can tell, MSG_TRUNC, which would’ve solved my issue, > isn’t implemented for SCTP. Regarding this topic, I’ve only found Agreed, but MSG_TRUNC would cause information loss. What about using a larger buf? > old discussions, including some suggestions to add SOCK_RDM, which > never materialised. > > Many thanks for your time! > > Luci Regards, Marcelo
