BIO_s_datagram: Wire capability negotiation for BIO_s_datagram

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 eb6897a3fdb74f382b2fc1d45bcc6d94062aaf4c..cc947943e5e25958b7b619692b6c8ced852b7a4a 100644 (file)
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -971,6 +971,13 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
         *(int *)ptr = data->local_addr_enabled;
         break;
 
+    case BIO_CTRL_DGRAM_GET_EFFECTIVE_CAPS:
+        ret = (long)(BIO_DGRAM_CAP_HANDLES_DST_ADDR
+                     | BIO_DGRAM_CAP_HANDLES_SRC_ADDR
+                     | BIO_DGRAM_CAP_PROVIDES_DST_ADDR
+                     | BIO_DGRAM_CAP_PROVIDES_SRC_ADDR);
+        break;
+
     case BIO_CTRL_GET_RPOLL_DESCRIPTOR:
     case BIO_CTRL_GET_WPOLL_DESCRIPTOR:
         {