On Sat, Mar 10, 2018 at 9:30 PM, studi <stu...@digsig.net> wrote: > Cap'n Proto is on top a bytestream layer. >
Not really. There are utilities for reading from / writing to a byte stream, but Cap'n Proto is not fundamentally tied to byte streams. In fact, Cap'n Proto is commonly used on top of mmap(), which is definitely not a byte stream. I want to send Cap's proto data on top of encrypted UDT streams. (Which are > not exactly streams since they reliably transmit arbitrary length records, > rather than an arbitrary stream of sequential bytes, necessitating > ciphertext stealing when a record is not a multiple of sixteen bytes) > > I suppose this is probably documented in some glaringly obvious place, or > should be self evident, but how do I arrange that Cap'n proto uses my > streams - how do I hook the output from Cap'n proto and supply it with > input? Are you talking about the base Cap'n Proto serialization, or the RPC protocol? For the base serialization (assuming C++): MessageBuilder::getSegmentsForOutput() returns an array of arrays pointing to the segments of the message (does not do a copy; returns pointers directly into the existing underlying memory). Do whatever you want with them. On the receiving end, use SegmentArrayMessageReader to take an array-of-arrays and read messages from them (again, with no copies). If you want to implement an alternative RPC transport, you need to write your own implementation of capnp::VatNetwork (defined in capnp/rpc.h). -Kenton -- You received this message because you are subscribed to the Google Groups "Cap'n Proto" group. To unsubscribe from this group and stop receiving emails from it, send an email to capnproto+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/capnproto.