Make DTLSv1_listen a first class function and change its type

The DTLSv1_listen function exposed details of the underlying BIO
abstraction and did not properly allow for IPv6. This commit changes the
"peer" argument to be a BIO_ADDR and makes it a first class function
(rather than a ctrl) to ensure proper type checking.

Reviewed-by: Richard Levitte <levitte@openssl.org>

1 files changed, 7 insertions, 10 deletions

diff --git a/doc/ssl/DTLSv1_listen.pod b/doc/ssl/DTLSv1_listen.pod
index b3dd1ae..62913de 100644
--- a/doc/ssl/DTLSv1_listen.pod
+++ b/doc/ssl/DTLSv1_listen.pod
@@ -8,7 +8,7 @@ DTLSv1_listen - listen for incoming DTLS connections.
 
  #include <openssl/ssl.h>
 
- int DTLSv1_listen(SSL *ssl, struct sockaddr *peer);
+ int DTLSv1_listen(SSL *ssl, BIO_ADDR *peer);
 
 =head1 DESCRIPTION
 
@@ -43,14 +43,10 @@ messages from any peer.
 When a ClientHello is received that contains a cookie that has been verified,
 then DTLSv1_listen() will return with the B<ssl> parameter updated into a state
 where the handshake can be continued by a call to (for example) SSL_accept().
-Additionally the B<struct sockaddr> location pointed to by B<peer> will be
-filled in with details of the peer that sent the ClientHello. It is the calling
-code's responsibility to ensure that the B<peer> location is sufficiently large
-to accommodate the addressing scheme in use. For example this might be done by
-allocating space for a struct sockaddr_storage and casting the pointer to it to
-a struct sockaddr * for the call to DTLSv1_listen(). Typically user code is
-expected to "connect" the underlying socket to the peer and continue the
-handshake in a connected state.
+Additionally the B<BIO_ADDR> pointed to by B<peer> will be filled in with
+details of the peer that sent the ClientHello. Typically user code is expected
+to "connect" the underlying socket to the peer and continue the handshake in a
+connected state.
 
 Prior to calling DTLSv1_listen() user code must ensure that cookie generation
 and verification callbacks have been set up using
@@ -89,6 +85,7 @@ L<ssl(3)>, L<bio(3)>
 
 =head1 HISTORY
 
-DTLSv1_listen() return codes were clarified in OpenSSL 1.1.0.
+DTLSv1_listen() return codes were clarified in OpenSSL 1.1.0. The type of "peer"
+also changed in OpenSSL 1.1.0.
 
 =cut