polypath asymmetric routing: Handle MSG2-4 late dupes

[secnet] / secnet.h

diff --git a/secnet.h b/secnet.h
index 361c49e..e253a14 100644 (file)
--- a/secnet.h
+++ b/secnet.h
@@ -548,9 +548,17 @@ typedef enum {
     transform_apply_ok       = 0, /* all is well (everyone may assume==0) */
     transform_apply_err      = 1, /* any other problem */
     transform_apply_seqrange = 2,
-        /* message decrypted but sequence number was out of range */
+        /* message decrypted but sequence number was out of recent range */
+    transform_apply_seqdupe  = 3,
+        /* message decrypted but was dupe of recent packet */
 } transform_apply_return;
 
+static inline bool_t
+transform_apply_return_badseq(transform_apply_return problem) {
+    return problem == transform_apply_seqrange ||
+          problem == transform_apply_seqdupe;
+}
+
 typedef transform_apply_return transform_apply_fn(void *st,
         struct buffer_if *buf, const char **errmsg);