Fix signature of min/max proto getter

The getters for min and max proto version wrongly passed NULL instead of
0 as third argument to SSL_ctrl() and SSL_CTX_ctrl(). The third argument
is not used, but the error results in a compiler warning:

warning: passing argument 3 of ‘SSL_CTX_ctrl’ makes integer from pointer without a cast [-Wint-conversion]
int v = SSL_CTX_get_max_proto_version(self->ctx);

See https://github.com/openssl/openssl/pull/4364

Signed-off-by: Christian Heimes <christian@python.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/5128)

(cherry picked from commit 1f82eba718f758757a439e717ea7a5aa8be55f8d)

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 7c03d49c36c592c18a381b0767b482a82ae170a8..bbc7c352ecd344e992b068d940ad55d302c2fe7f 100644 (file)
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1302,9 +1302,9 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
 #define SSL_set_max_proto_version(s, version) \
         SSL_ctrl(s, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
 #define SSL_get_min_proto_version(s) \
-        SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, NULL, NULL)
+        SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
 #define SSL_get_max_proto_version(s) \
-        SSL_ctrl(s, SSL_CTRL_GET_MAX_PROTO_VERSION, NULL, NULL)
+        SSL_ctrl(s, SSL_CTRL_GET_MAX_PROTO_VERSION, 0, NULL)
 
 #if OPENSSL_API_COMPAT < 0x10100000L
 /* Provide some compatibility macros for removed functionality. */