Dual DTLS version methods.

[openssl.git] / ssl / s3_srvr.c

diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index 27e745c2250ece08779e082254a963dc1bb64510..d9a21811e49dc699d82571802cb8809c8c884eda 100644 (file)
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -968,8 +968,9 @@ int ssl3_get_client_hello(SSL *s)
        s->client_version=(((int)p[0])<<8)|(int)p[1];
        p+=2;
 
-       if ((s->version == DTLS1_VERSION && s->client_version > s->version) ||
-           (s->version != DTLS1_VERSION && s->client_version < s->version))
+       if ((SSL_IS_DTLS(s) && s->client_version > s->version
+                       && s->method->version != DTLS_ANY_VERSION) ||
+           (!SSL_IS_DTLS(s) && s->client_version < s->version))
                {
                SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
                if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
@@ -1087,6 +1088,30 @@ int ssl3_get_client_hello(SSL *s)
                        }
 
                p += cookie_len;
+               if (s->method->version == DTLS_ANY_VERSION)
+                       {
+                       /* Select version to use */
+                       if (s->client_version <= DTLS1_2_VERSION &&
+                               !(s->options & SSL_OP_NO_DTLSv1_2))
+                               {
+                               s->version = DTLS1_2_VERSION;
+                               s->method = DTLSv1_2_server_method();
+                               }
+                       else if (s->client_version <= DTLS1_VERSION &&
+                               !(s->options & SSL_OP_NO_DTLSv1))
+                               {
+                               s->version = DTLS1_VERSION;
+                               s->method = DTLSv1_server_method();
+                               }
+                       else
+                               {
+                               SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
+                               s->version = s->client_version;
+                               al = SSL_AD_PROTOCOL_VERSION;
+                               goto f_err;
+                               }
+                       s->session->ssl_version = s->version;
+                       }
                }
 
        n2s(p,i);