BIO: Wire poll descriptor functions in BIO_s_sock

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21979)

diff --git a/crypto/bio/bss_sock.c b/crypto/bio/bss_sock.c
index f64eb8c843a4ba110ebf658446b6f754f4bcdf2c..4ff4defadff46fe6af5c1771cc683952fb6fdde8 100644 (file)
--- a/crypto/bio/bss_sock.c
+++ b/crypto/bio/bss_sock.c
@@ -215,6 +215,20 @@ static long sock_ctrl(BIO *b, int cmd, long num, void *ptr)
     case BIO_CTRL_FLUSH:
         ret = 1;
         break;
+    case BIO_CTRL_GET_RPOLL_DESCRIPTOR:
+    case BIO_CTRL_GET_WPOLL_DESCRIPTOR:
+        {
+            BIO_POLL_DESCRIPTOR *pd = ptr;
+
+            if (!b->init) {
+                ret = 0;
+                break;
+            }
+
+            pd->type        = BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD;
+            pd->value.fd    = b->num;
+        }
+        break;
 # ifndef OPENSSL_NO_KTLS
     case BIO_CTRL_SET_KTLS:
         crypto_info = (ktls_crypto_info_t *)ptr;