* netlink/error.scm (&netlink-decoder-error)[sub-type]: New field.
* netlink/data.scm (get-next-deserialize, get-current-deserialize): Fill
it out.
---
 netlink/data.scm  | 13 +++++++++----
 netlink/error.scm |  4 +++-
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/netlink/data.scm b/netlink/data.scm
index c9b5fb8..ac95051 100644
--- a/netlink/data.scm
+++ b/netlink/data.scm
@@ -51,15 +51,20 @@
   (match (assoc-ref decoder current-type)
     ((_ . type-alist)
      (or (assoc-ref type-alist target-type)
-         (assoc-ref type-alist 'default)))
+         (assoc-ref type-alist 'default)
+         (raise (condition (&netlink-decoder-error
+                            (type current-type)
+                            (sub-type target-type))))))
     (#f (raise (condition (&netlink-decoder-error
-                            (type current-type)))))))
-  
+                           (type current-type)
+                           (sub-type target-type)))))))
+
 (define (get-current-deserialize decoder current-type)
   (match (assoc-ref decoder current-type)
     ((current-deserialize . _) current-deserialize)
     (#f (raise (condition (&netlink-decoder-error
-                            (type current-type)))))))
+                            (type current-type)
+                            (sub-type #f)))))))
 
 (define (deserialize type decoder bv pos)
   (let ((deserialize (get-current-deserialize decoder type)))
diff --git a/netlink/error.scm b/netlink/error.scm
index 3e101ed..fa1dba6 100644
--- a/netlink/error.scm
+++ b/netlink/error.scm
@@ -23,6 +23,7 @@
             &netlink-decoder-error
             netlink-decoder-error?
             netlink-decoder-error-type
+            netlink-decoder-error-sub-type
 
             &netlink-family-error
             netlink-family-error?
@@ -57,7 +58,8 @@
 ;; No decoder for type
 (define-condition-type &netlink-decoder-error &netlink-error
   netlink-decoder-error?
-  (type netlink-decoder-error-type))
+  (type netlink-decoder-error-type)
+  (sub-type netlink-decoder-error-sub-type))
 
 ;; Unknown protocol family
 (define-condition-type &netlink-family-error &netlink-error
-- 
2.40.1




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