lib, ipcpd: piggyback ECDHE on flow allocation

The initial implementation for the ECDHE key exchange was doing the
key exchange after a flow was established. The public keys are now
sent allowg on the flow allocation messages, so that an encrypted
tunnel can be created within 1 RTT. The flow allocation steps had to
be extended to pass the opaque data ('piggybacking').

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/ipcpd/unicast/fa.h b/src/ipcpd/unicast/fa.h
index 8ced5e84..12a10a0c 100644
--- a/src/ipcpd/unicast/fa.h
+++ b/src/ipcpd/unicast/fa.h
@@ -36,10 +36,14 @@ void fa_stop(void);
 
 int  fa_alloc(int             fd,
               const uint8_t * dst,
-              qosspec_t       qs);
-
-int  fa_alloc_resp(int fd,
-                   int response);
+              qosspec_t       qs,
+              const void *    data,
+              size_t          len);
+
+int  fa_alloc_resp(int          fd,
+                   int          response,
+                   const void * data,
+                   size_t       len);
 
 int  fa_dealloc(int fd);