X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/tripe/blobdiff_plain/37941236c18baccbf89f5842ca63aee471d79256..452bf3f6897b8c6a22b51e1ef228da39136d51a7:/servutil.c

diff --git a/servutil.c b/servutil.c
index f4ab92e3..92a5f775 100644
--- a/servutil.c
+++ b/servutil.c
@@ -91,32 +91,6 @@ const char *timestr(time_t t)
   return ((const char *)buf_t);
 }
 
-/* --- @b64_encode@ --- *
- *
- * Arguments:	@const void *p@ = pointer to some gorp
- *		@size_t sz@ = size of the gorp
- *
- * Returns:	Pointer to base64-encoded version in @buf_t@.
- */
-
-const char *b64_encode(const void *p, size_t sz)
-{
-  base64_ctx b64;
-  dstr d = DSTR_INIT;
-
-  base64_init(&b64);
-  b64.indent = "";
-  b64.maxline = 0;
-  base64_encode(&b64, p, sz, &d);
-  base64_encode(&b64, 0, 0, &d);
-  while (d.len && d.buf[d.len - 1] == '=') d.len--;
-  assert(d.len < sizeof(buf_t));
-  memcpy(buf_t, d.buf, d.len);
-  buf_t[d.len] = 0;
-  dstr_destroy(&d);
-  return ((const char *)buf_t);
-}
-
 /* --- @seq_reset@ --- *
  *
  * Arguments:	@seqwin *s@ = sequence-checking window
@@ -132,20 +106,23 @@ void seq_reset(seqwin *s) { s->seq = 0; s->win = 0; }
  *
  * Arguments:	@seqwin *s@ = sequence-checking window
  *		@uint32 q@ = sequence number to check
+ *		@const char *service@ = service to report message from
  *
- * Returns:	A @SEQ_@ code.
+ * Returns:	Zero on success, nonzero if the sequence number was bad.
  *
  * Use:		Checks a sequence number against the window, updating things
  *		as necessary.
  */
 
-int seq_check(seqwin *s, uint32 q)
+int seq_check(seqwin *s, uint32 q, const char *service)
 {
   uint32 qbit;
   uint32 n;
 
-  if (q < s->seq)
-    return (SEQ_OLD);
+  if (q < s->seq) {
+    a_warn(service, "replay", "old-sequence", A_END);
+    return (-1);
+  }
   if (q >= s->seq + SEQ_WINSZ) {
     n = q - (s->seq + SEQ_WINSZ - 1);
     if (n < SEQ_WINSZ)
@@ -155,8 +132,10 @@ int seq_check(seqwin *s, uint32 q)
     s->seq += n;
   }
   qbit = 1 << (q - s->seq);
-  if (s->win & qbit)
-    return (SEQ_REPLAY);
+  if (s->win & qbit) {
+    a_warn(service, "replay", "duplicated-sequence", A_END);
+    return (-1);
+  }
   s->win |= qbit;
   return (0);
 }