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diff --git a/modules/ssl/mod_ssl.c b/modules/ssl/mod_ssl.c
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index 717a694..a3ce718 100644
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--- a/modules/ssl/mod_ssl.c
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+++ b/modules/ssl/mod_ssl.c
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@@ -395,6 +395,9 @@ static SSLConnRec *ssl_init_connection_ctx(conn_rec *c)
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     return sslconn;
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 }
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+static typeof(ssl_proxy_enable) *othermod_proxy_enable;
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+static typeof(ssl_engine_disable) *othermod_engine_disable;
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+
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 int ssl_proxy_enable(conn_rec *c)
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 {
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     SSLSrvConfigRec *sc;
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@@ -403,6 +406,12 @@ int ssl_proxy_enable(conn_rec *c)
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     sc = mySrvConfig(sslconn->server);
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     if (!sc->proxy_enabled) {
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+        if (othermod_proxy_enable) {
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+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
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+                          "mod_ssl proxy not configured, passing through to other module.");
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+            return othermod_proxy_enable(c);
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+        }
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+
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         ap_log_cerror(APLOG_MARK, APLOG_ERR, 0, c, APLOGNO(01961)
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                       "SSL Proxy requested for %s but not enabled "
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                       "[Hint: SSLProxyEngine]", sc->vhost_id);
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@@ -422,6 +431,10 @@ int ssl_engine_disable(conn_rec *c)
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     SSLConnRec *sslconn = myConnConfig(c);
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+    if (othermod_engine_disable) {
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+        othermod_engine_disable(c);
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+    }
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+
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     if (sslconn) {
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         sc = mySrvConfig(sslconn->server);
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     }
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@@ -621,6 +634,9 @@ static void ssl_register_hooks(apr_pool_t *p)
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     ap_hook_post_read_request(ssl_hook_ReadReq, pre_prr,NULL, APR_HOOK_MIDDLE);
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     ssl_var_register(p);
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+    
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+    othermod_proxy_enable = APR_RETRIEVE_OPTIONAL_FN(ssl_proxy_enable);
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+    othermod_engine_disable = APR_RETRIEVE_OPTIONAL_FN(ssl_engine_disable);
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     APR_REGISTER_OPTIONAL_FN(ssl_proxy_enable);
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     APR_REGISTER_OPTIONAL_FN(ssl_engine_disable);
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diff --git a/modules/ssl/ssl_engine_vars.c b/modules/ssl/ssl_engine_vars.c
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index a6b0d0d..24fd8c7 100644
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--- a/modules/ssl/ssl_engine_vars.c
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+++ b/modules/ssl/ssl_engine_vars.c
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@@ -54,6 +54,8 @@ static char *ssl_var_lookup_ssl_cipher(apr_pool_t *p, SSLConnRec *sslconn, char
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 static void  ssl_var_lookup_ssl_cipher_bits(SSL *ssl, int *usekeysize, int *algkeysize);
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 static char *ssl_var_lookup_ssl_version(apr_pool_t *p, char *var);
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 static char *ssl_var_lookup_ssl_compress_meth(SSL *ssl);
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+static APR_OPTIONAL_FN_TYPE(ssl_is_https) *othermod_is_https;
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+static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *othermod_var_lookup;
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 static SSLConnRec *ssl_get_effective_config(conn_rec *c)
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 {
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@@ -68,7 +70,9 @@ static SSLConnRec *ssl_get_effective_config(conn_rec *c)
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 static int ssl_is_https(conn_rec *c)
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 {
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     SSLConnRec *sslconn = ssl_get_effective_config(c);
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-    return sslconn && sslconn->ssl;
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+
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+    return (sslconn && sslconn->ssl)
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+        || (othermod_is_https && othermod_is_https(c));
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 }
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 static const char var_interface[] = "mod_ssl/" AP_SERVER_BASEREVISION;
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@@ -137,6 +141,9 @@ void ssl_var_register(apr_pool_t *p)
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 {
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     char *cp, *cp2;
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+    othermod_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
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+    othermod_var_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup);
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+
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     APR_REGISTER_OPTIONAL_FN(ssl_is_https);
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     APR_REGISTER_OPTIONAL_FN(ssl_var_lookup);
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     APR_REGISTER_OPTIONAL_FN(ssl_ext_list);
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@@ -272,6 +279,15 @@ char *ssl_var_lookup(apr_pool_t *p, server_rec *s, conn_rec *c, request_rec *r,
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      */
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     if (result == NULL && c != NULL) {
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         SSLConnRec *sslconn = ssl_get_effective_config(c);
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+
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+        if (strlen(var) > 4 && strcEQn(var, "SSL_", 4)
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+            && (!sslconn || !sslconn->ssl) && othermod_var_lookup) {
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+            /* For an SSL_* variable, if mod_ssl is not enabled for
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+             * this connection and another SSL module is present, pass
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+             * through to that module. */
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+            return othermod_var_lookup(p, s, c, r, var);
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+        }
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+
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         if (strlen(var) > 4 && strcEQn(var, "SSL_", 4)
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             && sslconn && sslconn->ssl)
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             result = ssl_var_lookup_ssl(p, sslconn, r, var+4);