QUIC RXFC: Add accessor for credit

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23360)

1 files changed, 8 insertions, 3 deletions

diff --git a/ssl/quic/quic_fc.c b/ssl/quic/quic_fc.c
index 750e896306..7e36aab09e 100644
--- a/ssl/quic/quic_fc.c
+++ b/ssl/quic/quic_fc.c
@@ -359,21 +359,26 @@ int ossl_quic_rxfc_on_retire(QUIC_RXFC *rxfc,
     return 1;
 }
 
-uint64_t ossl_quic_rxfc_get_cwm(QUIC_RXFC *rxfc)
+uint64_t ossl_quic_rxfc_get_cwm(const QUIC_RXFC *rxfc)
 {
     return rxfc->cwm;
 }
 
-uint64_t ossl_quic_rxfc_get_swm(QUIC_RXFC *rxfc)
+uint64_t ossl_quic_rxfc_get_swm(const QUIC_RXFC *rxfc)
 {
     return rxfc->swm;
 }
 
-uint64_t ossl_quic_rxfc_get_rwm(QUIC_RXFC *rxfc)
+uint64_t ossl_quic_rxfc_get_rwm(const QUIC_RXFC *rxfc)
 {
     return rxfc->rwm;
 }
 
+uint64_t ossl_quic_rxfc_get_credit(const QUIC_RXFC *rxfc)
+{
+    return ossl_quic_rxfc_get_cwm(rxfc) - ossl_quic_rxfc_get_swm(rxfc);
+}
+
 int ossl_quic_rxfc_has_cwm_changed(QUIC_RXFC *rxfc, int clear)
 {
     int r = rxfc->has_cwm_changed;