X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/3deadf73ca497f4c50a2dbe387f544ef0070cfb4..e9fcf28eed6a6e44d2e2b963b06bad2ae76309e1:/server/tripe.h?ds=sidebyside

diff --git a/server/tripe.h b/server/tripe.h
index 6f611822..5550c1fd 100644
--- a/server/tripe.h
+++ b/server/tripe.h
@@ -925,7 +925,7 @@ extern void kx_free(keyexch */*kx*/);
 
 extern void kx_newkeys(keyexch */*kx*/);
 
-/* --- @kx_init@ --- *
+/* --- @kx_setup@ --- *
  *
  * Arguments:	@keyexch *kx@ = pointer to key exchange context
  *		@peer *p@ = pointer to peer context
@@ -939,8 +939,8 @@ extern void kx_newkeys(keyexch */*kx*/);
  *		exchange.
  */
 
-extern int kx_init(keyexch */*kx*/, peer */*p*/,
-		   keyset **/*ks*/, unsigned /*f*/);
+extern int kx_setup(keyexch */*kx*/, peer */*p*/,
+		    keyset **/*ks*/, unsigned /*f*/);
 
 /*----- Keysets and symmetric cryptography --------------------------------*/
 
@@ -1768,6 +1768,39 @@ extern void seq_reset(seqwin */*s*/);
 
 extern int seq_check(seqwin */*s*/, uint32 /*q*/, const char */*service*/);
 
+typedef struct ratelim {
+  unsigned n, max, persec;
+  struct timeval when;
+} ratelim;
+
+/* --- @ratelim_init@ --- *
+ *
+ * Arguments:	@ratelim *r@ = rate-limiting state to fill in
+ *		@unsigned persec@ = credit to accumulate per second
+ *		@unsigned max@ = maximum credit to retain
+ *
+ * Returns:	---
+ *
+ * Use:		Initialize a rate-limiting state.
+ */
+
+extern void ratelim_init(ratelim */*r*/,
+			 unsigned /*persec*/, unsigned /*max*/);
+
+/* --- @ratelim_withdraw@ --- *
+ *
+ * Arguments:	@ratelim *r@ = rate-limiting state
+ *		@unsigned n@ = credit to withdraw
+ *
+ * Returns:	Zero if successful; @-1@ if there is unsufficient credit
+ *
+ * Use:		Updates the state with any accumulated credit.  Then, if
+ *		there there are more than @n@ credits available, withdraw @n@
+ *		and return successfully; otherwise, report failure.
+ */
+
+extern int ratelim_withdraw(ratelim */*r*/, unsigned /*n*/);
+
 /*----- That's all, folks -------------------------------------------------*/
 
 #ifdef __cplusplus