BIO_s_datagram: Support configuring non-blocking mode

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21715)

diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index b42e87b107ac81dd33fa75cc3f6cf72176936677..49cf56ad1924a22d4ae5f6a5c06e5fae1b49149b 100644 (file)
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -722,6 +722,10 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
     case BIO_CTRL_DGRAM_SET_PEER:
         BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
         break;
+    case BIO_C_SET_NBIO:
+        if (!BIO_socket_nbio(b->num, num != 0))
+            ret = 0;
+        break;
     case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
         data->next_timeout = ossl_time_from_timeval(*(struct timeval *)ptr);
         break;