Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 765 insertions, 0 deletions

diff --git a/modules/http2/h2_h2.c b/modules/http2/h2_h2.c
new file mode 100644
index 0000000..5580cef
--- /dev/null
+++ b/modules/http2/h2_h2.c
@@ -0,0 +1,765 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#include <assert.h>
+
+#include <apr_strings.h>
+#include <apr_optional.h>
+#include <apr_optional_hooks.h>
+
+#include <httpd.h>
+#include <http_core.h>
+#include <http_config.h>
+#include <http_connection.h>
+#include <http_protocol.h>
+#include <http_request.h>
+#include <http_log.h>
+
+#include "mod_ssl.h"
+
+#include "mod_http2.h"
+#include "h2_private.h"
+
+#include "h2_bucket_beam.h"
+#include "h2_stream.h"
+#include "h2_task.h"
+#include "h2_config.h"
+#include "h2_ctx.h"
+#include "h2_conn.h"
+#include "h2_filter.h"
+#include "h2_request.h"
+#include "h2_headers.h"
+#include "h2_session.h"
+#include "h2_util.h"
+#include "h2_h2.h"
+#include "mod_http2.h"
+
+const char *h2_tls_protos[] = {
+    "h2", NULL
+};
+
+const char *h2_clear_protos[] = {
+    "h2c", NULL
+};
+
+const char *H2_MAGIC_TOKEN = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n";
+
+/*******************************************************************************
+ * The optional mod_ssl functions we need. 
+ */
+static APR_OPTIONAL_FN_TYPE(ssl_is_https) *opt_ssl_is_https;
+static APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *opt_ssl_var_lookup;
+
+
+/*******************************************************************************
+ * HTTP/2 error stuff
+ */
+static const char *h2_err_descr[] = {
+    "no error",                    /* 0x0 */
+    "protocol error",
+    "internal error",
+    "flow control error",
+    "settings timeout",
+    "stream closed",               /* 0x5 */
+    "frame size error",
+    "refused stream",
+    "cancel",
+    "compression error",
+    "connect error",               /* 0xa */
+    "enhance your calm",
+    "inadequate security",
+    "http/1.1 required",
+};
+
+const char *h2_h2_err_description(unsigned int h2_error)
+{
+    if (h2_error < (sizeof(h2_err_descr)/sizeof(h2_err_descr[0]))) {
+        return h2_err_descr[h2_error];
+    }
+    return "unknown http/2 error code";
+}
+
+/*******************************************************************************
+ * Check connection security requirements of RFC 7540
+ */
+
+/*
+ * Black Listed Ciphers from RFC 7549 Appendix A
+ *
+ */
+static const char *RFC7540_names[] = {
+    /* ciphers with NULL encrpytion */
+    "NULL-MD5",                         /* TLS_NULL_WITH_NULL_NULL */
+    /* same */                          /* TLS_RSA_WITH_NULL_MD5 */
+    "NULL-SHA",                         /* TLS_RSA_WITH_NULL_SHA */
+    "NULL-SHA256",                      /* TLS_RSA_WITH_NULL_SHA256 */
+    "PSK-NULL-SHA",                     /* TLS_PSK_WITH_NULL_SHA */
+    "DHE-PSK-NULL-SHA",                 /* TLS_DHE_PSK_WITH_NULL_SHA */
+    "RSA-PSK-NULL-SHA",                 /* TLS_RSA_PSK_WITH_NULL_SHA */
+    "PSK-NULL-SHA256",                  /* TLS_PSK_WITH_NULL_SHA256 */
+    "PSK-NULL-SHA384",                  /* TLS_PSK_WITH_NULL_SHA384 */
+    "DHE-PSK-NULL-SHA256",              /* TLS_DHE_PSK_WITH_NULL_SHA256 */
+    "DHE-PSK-NULL-SHA384",              /* TLS_DHE_PSK_WITH_NULL_SHA384 */
+    "RSA-PSK-NULL-SHA256",              /* TLS_RSA_PSK_WITH_NULL_SHA256 */
+    "RSA-PSK-NULL-SHA384",              /* TLS_RSA_PSK_WITH_NULL_SHA384 */
+    "ECDH-ECDSA-NULL-SHA",              /* TLS_ECDH_ECDSA_WITH_NULL_SHA */
+    "ECDHE-ECDSA-NULL-SHA",             /* TLS_ECDHE_ECDSA_WITH_NULL_SHA */
+    "ECDH-RSA-NULL-SHA",                /* TLS_ECDH_RSA_WITH_NULL_SHA */
+    "ECDHE-RSA-NULL-SHA",               /* TLS_ECDHE_RSA_WITH_NULL_SHA */
+    "AECDH-NULL-SHA",                   /* TLS_ECDH_anon_WITH_NULL_SHA */
+    "ECDHE-PSK-NULL-SHA",               /* TLS_ECDHE_PSK_WITH_NULL_SHA */
+    "ECDHE-PSK-NULL-SHA256",            /* TLS_ECDHE_PSK_WITH_NULL_SHA256 */
+    "ECDHE-PSK-NULL-SHA384",            /* TLS_ECDHE_PSK_WITH_NULL_SHA384 */
+    
+    /* DES/3DES ciphers */
+    "PSK-3DES-EDE-CBC-SHA",             /* TLS_PSK_WITH_3DES_EDE_CBC_SHA */
+    "DHE-PSK-3DES-EDE-CBC-SHA",         /* TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA */
+    "RSA-PSK-3DES-EDE-CBC-SHA",         /* TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA */
+    "ECDH-ECDSA-DES-CBC3-SHA",          /* TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA */
+    "ECDHE-ECDSA-DES-CBC3-SHA",         /* TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA */
+    "ECDH-RSA-DES-CBC3-SHA",            /* TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA */
+    "ECDHE-RSA-DES-CBC3-SHA",           /* TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA */
+    "AECDH-DES-CBC3-SHA",               /* TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA */
+    "SRP-3DES-EDE-CBC-SHA",             /* TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA */
+    "SRP-RSA-3DES-EDE-CBC-SHA",         /* TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA */
+    "SRP-DSS-3DES-EDE-CBC-SHA",         /* TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA */
+    "ECDHE-PSK-3DES-EDE-CBC-SHA",       /* TLS_ECDHE_PSK_WITH_3DES_EDE_CBC_SHA */
+    "DES-CBC-SHA",                      /* TLS_RSA_WITH_DES_CBC_SHA */
+    "DES-CBC3-SHA",                     /* TLS_RSA_WITH_3DES_EDE_CBC_SHA */
+    "DHE-DSS-DES-CBC3-SHA",             /* TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA */
+    "DHE-RSA-DES-CBC-SHA",              /* TLS_DHE_RSA_WITH_DES_CBC_SHA */
+    "DHE-RSA-DES-CBC3-SHA",             /* TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA */
+    "ADH-DES-CBC-SHA",                  /* TLS_DH_anon_WITH_DES_CBC_SHA */
+    "ADH-DES-CBC3-SHA",                 /* TLS_DH_anon_WITH_3DES_EDE_CBC_SHA */
+    "EXP-DH-DSS-DES-CBC-SHA",           /* TLS_DH_DSS_EXPORT_WITH_DES40_CBC_SHA */
+    "DH-DSS-DES-CBC-SHA",               /* TLS_DH_DSS_WITH_DES_CBC_SHA */
+    "DH-DSS-DES-CBC3-SHA",              /* TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA */
+    "EXP-DH-RSA-DES-CBC-SHA",           /* TLS_DH_RSA_EXPORT_WITH_DES40_CBC_SHA */
+    "DH-RSA-DES-CBC-SHA",               /* TLS_DH_RSA_WITH_DES_CBC_SHA */
+    "DH-RSA-DES-CBC3-SHA",              /* TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA */
+
+    /* blacklisted EXPORT ciphers */
+    "EXP-RC4-MD5",                      /* TLS_RSA_EXPORT_WITH_RC4_40_MD5 */
+    "EXP-RC2-CBC-MD5",                  /* TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 */
+    "EXP-DES-CBC-SHA",                  /* TLS_RSA_EXPORT_WITH_DES40_CBC_SHA */
+    "EXP-DHE-DSS-DES-CBC-SHA",          /* TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA */
+    "EXP-DHE-RSA-DES-CBC-SHA",          /* TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA */
+    "EXP-ADH-DES-CBC-SHA",              /* TLS_DH_anon_EXPORT_WITH_DES40_CBC_SHA */
+    "EXP-ADH-RC4-MD5",                  /* TLS_DH_anon_EXPORT_WITH_RC4_40_MD5 */
+
+    /* blacklisted RC4 encryption */
+    "RC4-MD5",                          /* TLS_RSA_WITH_RC4_128_MD5 */
+    "RC4-SHA",                          /* TLS_RSA_WITH_RC4_128_SHA */
+    "ADH-RC4-MD5",                      /* TLS_DH_anon_WITH_RC4_128_MD5 */
+    "KRB5-RC4-SHA",                     /* TLS_KRB5_WITH_RC4_128_SHA */
+    "KRB5-RC4-MD5",                     /* TLS_KRB5_WITH_RC4_128_MD5 */
+    "EXP-KRB5-RC4-SHA",                 /* TLS_KRB5_EXPORT_WITH_RC4_40_SHA */
+    "EXP-KRB5-RC4-MD5",                 /* TLS_KRB5_EXPORT_WITH_RC4_40_MD5 */
+    "PSK-RC4-SHA",                      /* TLS_PSK_WITH_RC4_128_SHA */
+    "DHE-PSK-RC4-SHA",                  /* TLS_DHE_PSK_WITH_RC4_128_SHA */
+    "RSA-PSK-RC4-SHA",                  /* TLS_RSA_PSK_WITH_RC4_128_SHA */
+    "ECDH-ECDSA-RC4-SHA",               /* TLS_ECDH_ECDSA_WITH_RC4_128_SHA */
+    "ECDHE-ECDSA-RC4-SHA",              /* TLS_ECDHE_ECDSA_WITH_RC4_128_SHA */
+    "ECDH-RSA-RC4-SHA",                 /* TLS_ECDH_RSA_WITH_RC4_128_SHA */
+    "ECDHE-RSA-RC4-SHA",                /* TLS_ECDHE_RSA_WITH_RC4_128_SHA */
+    "AECDH-RC4-SHA",                    /* TLS_ECDH_anon_WITH_RC4_128_SHA */
+    "ECDHE-PSK-RC4-SHA",                /* TLS_ECDHE_PSK_WITH_RC4_128_SHA */
+
+    /* blacklisted AES128 encrpytion ciphers */
+    "AES128-SHA256",                    /* TLS_RSA_WITH_AES_128_CBC_SHA */
+    "DH-DSS-AES128-SHA",                /* TLS_DH_DSS_WITH_AES_128_CBC_SHA */
+    "DH-RSA-AES128-SHA",                /* TLS_DH_RSA_WITH_AES_128_CBC_SHA */
+    "DHE-DSS-AES128-SHA",               /* TLS_DHE_DSS_WITH_AES_128_CBC_SHA */
+    "DHE-RSA-AES128-SHA",               /* TLS_DHE_RSA_WITH_AES_128_CBC_SHA */
+    "ADH-AES128-SHA",                   /* TLS_DH_anon_WITH_AES_128_CBC_SHA */
+    "AES128-SHA256",                    /* TLS_RSA_WITH_AES_128_CBC_SHA256 */
+    "DH-DSS-AES128-SHA256",             /* TLS_DH_DSS_WITH_AES_128_CBC_SHA256 */
+    "DH-RSA-AES128-SHA256",             /* TLS_DH_RSA_WITH_AES_128_CBC_SHA256 */
+    "DHE-DSS-AES128-SHA256",            /* TLS_DHE_DSS_WITH_AES_128_CBC_SHA256 */
+    "DHE-RSA-AES128-SHA256",            /* TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 */
+    "ECDH-ECDSA-AES128-SHA",            /* TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA */
+    "ECDHE-ECDSA-AES128-SHA",           /* TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA */
+    "ECDH-RSA-AES128-SHA",              /* TLS_ECDH_RSA_WITH_AES_128_CBC_SHA */
+    "ECDHE-RSA-AES128-SHA",             /* TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA */
+    "AECDH-AES128-SHA",                 /* TLS_ECDH_anon_WITH_AES_128_CBC_SHA */
+    "ECDHE-ECDSA-AES128-SHA256",        /* TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 */
+    "ECDH-ECDSA-AES128-SHA256",         /* TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256 */
+    "ECDHE-RSA-AES128-SHA256",          /* TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 */
+    "ECDH-RSA-AES128-SHA256",           /* TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256 */
+    "ADH-AES128-SHA256",                /* TLS_DH_anon_WITH_AES_128_CBC_SHA256 */
+    "PSK-AES128-CBC-SHA",               /* TLS_PSK_WITH_AES_128_CBC_SHA */
+    "DHE-PSK-AES128-CBC-SHA",           /* TLS_DHE_PSK_WITH_AES_128_CBC_SHA */
+    "RSA-PSK-AES128-CBC-SHA",           /* TLS_RSA_PSK_WITH_AES_128_CBC_SHA */
+    "PSK-AES128-CBC-SHA256",            /* TLS_PSK_WITH_AES_128_CBC_SHA256 */
+    "DHE-PSK-AES128-CBC-SHA256",        /* TLS_DHE_PSK_WITH_AES_128_CBC_SHA256 */
+    "RSA-PSK-AES128-CBC-SHA256",        /* TLS_RSA_PSK_WITH_AES_128_CBC_SHA256 */
+    "ECDHE-PSK-AES128-CBC-SHA",         /* TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA */
+    "ECDHE-PSK-AES128-CBC-SHA256",      /* TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256 */
+    "AES128-CCM",                       /* TLS_RSA_WITH_AES_128_CCM */
+    "AES128-CCM8",                      /* TLS_RSA_WITH_AES_128_CCM_8 */
+    "PSK-AES128-CCM",                   /* TLS_PSK_WITH_AES_128_CCM */
+    "PSK-AES128-CCM8",                  /* TLS_PSK_WITH_AES_128_CCM_8 */
+    "AES128-GCM-SHA256",                /* TLS_RSA_WITH_AES_128_GCM_SHA256 */
+    "DH-RSA-AES128-GCM-SHA256",         /* TLS_DH_RSA_WITH_AES_128_GCM_SHA256 */
+    "DH-DSS-AES128-GCM-SHA256",         /* TLS_DH_DSS_WITH_AES_128_GCM_SHA256 */
+    "ADH-AES128-GCM-SHA256",            /* TLS_DH_anon_WITH_AES_128_GCM_SHA256 */
+    "PSK-AES128-GCM-SHA256",            /* TLS_PSK_WITH_AES_128_GCM_SHA256 */
+    "RSA-PSK-AES128-GCM-SHA256",        /* TLS_RSA_PSK_WITH_AES_128_GCM_SHA256 */
+    "ECDH-ECDSA-AES128-GCM-SHA256",     /* TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 */
+    "ECDH-RSA-AES128-GCM-SHA256",       /* TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256 */
+    "SRP-AES-128-CBC-SHA",              /* TLS_SRP_SHA_WITH_AES_128_CBC_SHA */
+    "SRP-RSA-AES-128-CBC-SHA",          /* TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA */
+    "SRP-DSS-AES-128-CBC-SHA",          /* TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA */
+    
+    /* blacklisted AES256 encrpytion ciphers */
+    "AES256-SHA",                       /* TLS_RSA_WITH_AES_256_CBC_SHA */
+    "DH-DSS-AES256-SHA",                /* TLS_DH_DSS_WITH_AES_256_CBC_SHA */
+    "DH-RSA-AES256-SHA",                /* TLS_DH_RSA_WITH_AES_256_CBC_SHA */
+    "DHE-DSS-AES256-SHA",               /* TLS_DHE_DSS_WITH_AES_256_CBC_SHA */
+    "DHE-RSA-AES256-SHA",               /* TLS_DHE_RSA_WITH_AES_256_CBC_SHA */
+    "ADH-AES256-SHA",                   /* TLS_DH_anon_WITH_AES_256_CBC_SHA */
+    "AES256-SHA256",                    /* TLS_RSA_WITH_AES_256_CBC_SHA256 */
+    "DH-DSS-AES256-SHA256",             /* TLS_DH_DSS_WITH_AES_256_CBC_SHA256 */
+    "DH-RSA-AES256-SHA256",             /* TLS_DH_RSA_WITH_AES_256_CBC_SHA256 */
+    "DHE-DSS-AES256-SHA256",            /* TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 */
+    "DHE-RSA-AES256-SHA256",            /* TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 */
+    "ADH-AES256-SHA256",                /* TLS_DH_anon_WITH_AES_256_CBC_SHA256 */
+    "ECDH-ECDSA-AES256-SHA",            /* TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA */
+    "ECDHE-ECDSA-AES256-SHA",           /* TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA */
+    "ECDH-RSA-AES256-SHA",              /* TLS_ECDH_RSA_WITH_AES_256_CBC_SHA */
+    "ECDHE-RSA-AES256-SHA",             /* TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA */
+    "AECDH-AES256-SHA",                 /* TLS_ECDH_anon_WITH_AES_256_CBC_SHA */
+    "ECDHE-ECDSA-AES256-SHA384",        /* TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 */
+    "ECDH-ECDSA-AES256-SHA384",         /* TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384 */
+    "ECDHE-RSA-AES256-SHA384",          /* TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 */
+    "ECDH-RSA-AES256-SHA384",           /* TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384 */
+    "PSK-AES256-CBC-SHA",               /* TLS_PSK_WITH_AES_256_CBC_SHA */
+    "DHE-PSK-AES256-CBC-SHA",           /* TLS_DHE_PSK_WITH_AES_256_CBC_SHA */
+    "RSA-PSK-AES256-CBC-SHA",           /* TLS_RSA_PSK_WITH_AES_256_CBC_SHA */
+    "PSK-AES256-CBC-SHA384",            /* TLS_PSK_WITH_AES_256_CBC_SHA384 */
+    "DHE-PSK-AES256-CBC-SHA384",        /* TLS_DHE_PSK_WITH_AES_256_CBC_SHA384 */
+    "RSA-PSK-AES256-CBC-SHA384",        /* TLS_RSA_PSK_WITH_AES_256_CBC_SHA384 */
+    "ECDHE-PSK-AES256-CBC-SHA",         /* TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA */
+    "ECDHE-PSK-AES256-CBC-SHA384",      /* TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA384 */
+    "SRP-AES-256-CBC-SHA",              /* TLS_SRP_SHA_WITH_AES_256_CBC_SHA */
+    "SRP-RSA-AES-256-CBC-SHA",          /* TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA */
+    "SRP-DSS-AES-256-CBC-SHA",          /* TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA */
+    "AES256-CCM",                       /* TLS_RSA_WITH_AES_256_CCM */
+    "AES256-CCM8",                      /* TLS_RSA_WITH_AES_256_CCM_8 */
+    "PSK-AES256-CCM",                   /* TLS_PSK_WITH_AES_256_CCM */
+    "PSK-AES256-CCM8",                  /* TLS_PSK_WITH_AES_256_CCM_8 */
+    "AES256-GCM-SHA384",                /* TLS_RSA_WITH_AES_256_GCM_SHA384 */
+    "DH-RSA-AES256-GCM-SHA384",         /* TLS_DH_RSA_WITH_AES_256_GCM_SHA384 */
+    "DH-DSS-AES256-GCM-SHA384",         /* TLS_DH_DSS_WITH_AES_256_GCM_SHA384 */
+    "ADH-AES256-GCM-SHA384",            /* TLS_DH_anon_WITH_AES_256_GCM_SHA384 */
+    "PSK-AES256-GCM-SHA384",            /* TLS_PSK_WITH_AES_256_GCM_SHA384 */
+    "RSA-PSK-AES256-GCM-SHA384",        /* TLS_RSA_PSK_WITH_AES_256_GCM_SHA384 */
+    "ECDH-ECDSA-AES256-GCM-SHA384",     /* TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 */
+    "ECDH-RSA-AES256-GCM-SHA384",       /* TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384 */
+    
+    /* blacklisted CAMELLIA128 encrpytion ciphers */
+    "CAMELLIA128-SHA",                  /* TLS_RSA_WITH_CAMELLIA_128_CBC_SHA */
+    "DH-DSS-CAMELLIA128-SHA",           /* TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA */
+    "DH-RSA-CAMELLIA128-SHA",           /* TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA */
+    "DHE-DSS-CAMELLIA128-SHA",          /* TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA */
+    "DHE-RSA-CAMELLIA128-SHA",          /* TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA */
+    "ADH-CAMELLIA128-SHA",              /* TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA */
+    "ECDHE-ECDSA-CAMELLIA128-SHA256",   /* TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "ECDH-ECDSA-CAMELLIA128-SHA256",    /* TLS_ECDH_ECDSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "ECDHE-RSA-CAMELLIA128-SHA256",     /* TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "ECDH-RSA-CAMELLIA128-SHA256",      /* TLS_ECDH_RSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "PSK-CAMELLIA128-SHA256",           /* TLS_PSK_WITH_CAMELLIA_128_CBC_SHA256 */
+    "DHE-PSK-CAMELLIA128-SHA256",       /* TLS_DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 */
+    "RSA-PSK-CAMELLIA128-SHA256",       /* TLS_RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256 */
+    "ECDHE-PSK-CAMELLIA128-SHA256",     /* TLS_ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256 */
+    "CAMELLIA128-GCM-SHA256",           /* TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256 */
+    "DH-RSA-CAMELLIA128-GCM-SHA256",    /* TLS_DH_RSA_WITH_CAMELLIA_128_GCM_SHA256 */
+    "DH-DSS-CAMELLIA128-GCM-SHA256",    /* TLS_DH_DSS_WITH_CAMELLIA_128_GCM_SHA256 */
+    "ADH-CAMELLIA128-GCM-SHA256",       /* TLS_DH_anon_WITH_CAMELLIA_128_GCM_SHA256 */
+    "ECDH-ECDSA-CAMELLIA128-GCM-SHA256",/* TLS_ECDH_ECDSA_WITH_CAMELLIA_128_GCM_SHA256 */
+    "ECDH-RSA-CAMELLIA128-GCM-SHA256",  /* TLS_ECDH_RSA_WITH_CAMELLIA_128_GCM_SHA256 */
+    "PSK-CAMELLIA128-GCM-SHA256",       /* TLS_PSK_WITH_CAMELLIA_128_GCM_SHA256 */
+    "RSA-PSK-CAMELLIA128-GCM-SHA256",   /* TLS_RSA_PSK_WITH_CAMELLIA_128_GCM_SHA256 */
+    "CAMELLIA128-SHA256",               /* TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "DH-DSS-CAMELLIA128-SHA256",        /* TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA256 */
+    "DH-RSA-CAMELLIA128-SHA256",        /* TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "DHE-DSS-CAMELLIA128-SHA256",       /* TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA256 */
+    "DHE-RSA-CAMELLIA128-SHA256",       /* TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256 */
+    "ADH-CAMELLIA128-SHA256",           /* TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256 */
+    
+    /* blacklisted CAMELLIA256 encrpytion ciphers */
+    "CAMELLIA256-SHA",                  /* TLS_RSA_WITH_CAMELLIA_256_CBC_SHA */
+    "DH-RSA-CAMELLIA256-SHA",           /* TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA */
+    "DH-DSS-CAMELLIA256-SHA",           /* TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA */
+    "DHE-DSS-CAMELLIA256-SHA",          /* TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA */
+    "DHE-RSA-CAMELLIA256-SHA",          /* TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA */
+    "ADH-CAMELLIA256-SHA",              /* TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA */
+    "ECDHE-ECDSA-CAMELLIA256-SHA384",   /* TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 */
+    "ECDH-ECDSA-CAMELLIA256-SHA384",    /* TLS_ECDH_ECDSA_WITH_CAMELLIA_256_CBC_SHA384 */
+    "ECDHE-RSA-CAMELLIA256-SHA384",     /* TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384 */
+    "ECDH-RSA-CAMELLIA256-SHA384",      /* TLS_ECDH_RSA_WITH_CAMELLIA_256_CBC_SHA384 */
+    "PSK-CAMELLIA256-SHA384",           /* TLS_PSK_WITH_CAMELLIA_256_CBC_SHA384 */
+    "DHE-PSK-CAMELLIA256-SHA384",       /* TLS_DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 */
+    "RSA-PSK-CAMELLIA256-SHA384",       /* TLS_RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384 */
+    "ECDHE-PSK-CAMELLIA256-SHA384",     /* TLS_ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384 */
+    "CAMELLIA256-SHA256",               /* TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256 */
+    "DH-DSS-CAMELLIA256-SHA256",        /* TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA256 */
+    "DH-RSA-CAMELLIA256-SHA256",        /* TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA256 */
+    "DHE-DSS-CAMELLIA256-SHA256",       /* TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA256 */
+    "DHE-RSA-CAMELLIA256-SHA256",       /* TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256 */
+    "ADH-CAMELLIA256-SHA256",           /* TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256 */
+    "CAMELLIA256-GCM-SHA384",           /* TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384 */
+    "DH-RSA-CAMELLIA256-GCM-SHA384",    /* TLS_DH_RSA_WITH_CAMELLIA_256_GCM_SHA384 */
+    "DH-DSS-CAMELLIA256-GCM-SHA384",    /* TLS_DH_DSS_WITH_CAMELLIA_256_GCM_SHA384 */
+    "ADH-CAMELLIA256-GCM-SHA384",       /* TLS_DH_anon_WITH_CAMELLIA_256_GCM_SHA384 */
+    "ECDH-ECDSA-CAMELLIA256-GCM-SHA384",/* TLS_ECDH_ECDSA_WITH_CAMELLIA_256_GCM_SHA384 */
+    "ECDH-RSA-CAMELLIA256-GCM-SHA384",  /* TLS_ECDH_RSA_WITH_CAMELLIA_256_GCM_SHA384 */
+    "PSK-CAMELLIA256-GCM-SHA384",       /* TLS_PSK_WITH_CAMELLIA_256_GCM_SHA384 */
+    "RSA-PSK-CAMELLIA256-GCM-SHA384",   /* TLS_RSA_PSK_WITH_CAMELLIA_256_GCM_SHA384 */
+    
+    /* The blacklisted ARIA encrpytion ciphers */
+    "ARIA128-SHA256",                   /* TLS_RSA_WITH_ARIA_128_CBC_SHA256 */
+    "ARIA256-SHA384",                   /* TLS_RSA_WITH_ARIA_256_CBC_SHA384 */
+    "DH-DSS-ARIA128-SHA256",            /* TLS_DH_DSS_WITH_ARIA_128_CBC_SHA256 */
+    "DH-DSS-ARIA256-SHA384",            /* TLS_DH_DSS_WITH_ARIA_256_CBC_SHA384 */
+    "DH-RSA-ARIA128-SHA256",            /* TLS_DH_RSA_WITH_ARIA_128_CBC_SHA256 */
+    "DH-RSA-ARIA256-SHA384",            /* TLS_DH_RSA_WITH_ARIA_256_CBC_SHA384 */
+    "DHE-DSS-ARIA128-SHA256",           /* TLS_DHE_DSS_WITH_ARIA_128_CBC_SHA256 */
+    "DHE-DSS-ARIA256-SHA384",           /* TLS_DHE_DSS_WITH_ARIA_256_CBC_SHA384 */
+    "DHE-RSA-ARIA128-SHA256",           /* TLS_DHE_RSA_WITH_ARIA_128_CBC_SHA256 */
+    "DHE-RSA-ARIA256-SHA384",           /* TLS_DHE_RSA_WITH_ARIA_256_CBC_SHA384 */
+    "ADH-ARIA128-SHA256",               /* TLS_DH_anon_WITH_ARIA_128_CBC_SHA256 */
+    "ADH-ARIA256-SHA384",               /* TLS_DH_anon_WITH_ARIA_256_CBC_SHA384 */
+    "ECDHE-ECDSA-ARIA128-SHA256",       /* TLS_ECDHE_ECDSA_WITH_ARIA_128_CBC_SHA256 */
+    "ECDHE-ECDSA-ARIA256-SHA384",       /* TLS_ECDHE_ECDSA_WITH_ARIA_256_CBC_SHA384 */
+    "ECDH-ECDSA-ARIA128-SHA256",        /* TLS_ECDH_ECDSA_WITH_ARIA_128_CBC_SHA256 */
+    "ECDH-ECDSA-ARIA256-SHA384",        /* TLS_ECDH_ECDSA_WITH_ARIA_256_CBC_SHA384 */
+    "ECDHE-RSA-ARIA128-SHA256",         /* TLS_ECDHE_RSA_WITH_ARIA_128_CBC_SHA256 */
+    "ECDHE-RSA-ARIA256-SHA384",         /* TLS_ECDHE_RSA_WITH_ARIA_256_CBC_SHA384 */
+    "ECDH-RSA-ARIA128-SHA256",          /* TLS_ECDH_RSA_WITH_ARIA_128_CBC_SHA256 */
+    "ECDH-RSA-ARIA256-SHA384",          /* TLS_ECDH_RSA_WITH_ARIA_256_CBC_SHA384 */
+    "ARIA128-GCM-SHA256",               /* TLS_RSA_WITH_ARIA_128_GCM_SHA256 */
+    "ARIA256-GCM-SHA384",               /* TLS_RSA_WITH_ARIA_256_GCM_SHA384 */
+    "DH-DSS-ARIA128-GCM-SHA256",        /* TLS_DH_DSS_WITH_ARIA_128_GCM_SHA256 */
+    "DH-DSS-ARIA256-GCM-SHA384",        /* TLS_DH_DSS_WITH_ARIA_256_GCM_SHA384 */
+    "DH-RSA-ARIA128-GCM-SHA256",        /* TLS_DH_RSA_WITH_ARIA_128_GCM_SHA256 */
+    "DH-RSA-ARIA256-GCM-SHA384",        /* TLS_DH_RSA_WITH_ARIA_256_GCM_SHA384 */
+    "ADH-ARIA128-GCM-SHA256",           /* TLS_DH_anon_WITH_ARIA_128_GCM_SHA256 */
+    "ADH-ARIA256-GCM-SHA384",           /* TLS_DH_anon_WITH_ARIA_256_GCM_SHA384 */
+    "ECDH-ECDSA-ARIA128-GCM-SHA256",    /* TLS_ECDH_ECDSA_WITH_ARIA_128_GCM_SHA256 */
+    "ECDH-ECDSA-ARIA256-GCM-SHA384",    /* TLS_ECDH_ECDSA_WITH_ARIA_256_GCM_SHA384 */
+    "ECDH-RSA-ARIA128-GCM-SHA256",      /* TLS_ECDH_RSA_WITH_ARIA_128_GCM_SHA256 */
+    "ECDH-RSA-ARIA256-GCM-SHA384",      /* TLS_ECDH_RSA_WITH_ARIA_256_GCM_SHA384 */
+    "PSK-ARIA128-SHA256",               /* TLS_PSK_WITH_ARIA_128_CBC_SHA256 */
+    "PSK-ARIA256-SHA384",               /* TLS_PSK_WITH_ARIA_256_CBC_SHA384 */
+    "DHE-PSK-ARIA128-SHA256",           /* TLS_DHE_PSK_WITH_ARIA_128_CBC_SHA256 */
+    "DHE-PSK-ARIA256-SHA384",           /* TLS_DHE_PSK_WITH_ARIA_256_CBC_SHA384 */
+    "RSA-PSK-ARIA128-SHA256",           /* TLS_RSA_PSK_WITH_ARIA_128_CBC_SHA256 */
+    "RSA-PSK-ARIA256-SHA384",           /* TLS_RSA_PSK_WITH_ARIA_256_CBC_SHA384 */
+    "ARIA128-GCM-SHA256",               /* TLS_PSK_WITH_ARIA_128_GCM_SHA256 */
+    "ARIA256-GCM-SHA384",               /* TLS_PSK_WITH_ARIA_256_GCM_SHA384 */
+    "RSA-PSK-ARIA128-GCM-SHA256",       /* TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256 */
+    "RSA-PSK-ARIA256-GCM-SHA384",       /* TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384 */
+    "ECDHE-PSK-ARIA128-SHA256",         /* TLS_ECDHE_PSK_WITH_ARIA_128_CBC_SHA256 */
+    "ECDHE-PSK-ARIA256-SHA384",         /* TLS_ECDHE_PSK_WITH_ARIA_256_CBC_SHA384 */
+
+    /* blacklisted SEED encryptions */
+    "SEED-SHA",                         /*TLS_RSA_WITH_SEED_CBC_SHA */
+    "DH-DSS-SEED-SHA",                  /* TLS_DH_DSS_WITH_SEED_CBC_SHA */
+    "DH-RSA-SEED-SHA",                  /* TLS_DH_RSA_WITH_SEED_CBC_SHA */
+    "DHE-DSS-SEED-SHA",                 /* TLS_DHE_DSS_WITH_SEED_CBC_SHA */
+    "DHE-RSA-SEED-SHA",                 /* TLS_DHE_RSA_WITH_SEED_CBC_SHA */               
+    "ADH-SEED-SHA",                     /* TLS_DH_anon_WITH_SEED_CBC_SHA */
+
+    /* blacklisted KRB5 ciphers */
+    "KRB5-DES-CBC-SHA",                 /* TLS_KRB5_WITH_DES_CBC_SHA */
+    "KRB5-DES-CBC3-SHA",                /* TLS_KRB5_WITH_3DES_EDE_CBC_SHA */
+    "KRB5-IDEA-CBC-SHA",                /* TLS_KRB5_WITH_IDEA_CBC_SHA */
+    "KRB5-DES-CBC-MD5",                 /* TLS_KRB5_WITH_DES_CBC_MD5 */
+    "KRB5-DES-CBC3-MD5",                /* TLS_KRB5_WITH_3DES_EDE_CBC_MD5 */
+    "KRB5-IDEA-CBC-MD5",                /* TLS_KRB5_WITH_IDEA_CBC_MD5 */
+    "EXP-KRB5-DES-CBC-SHA",             /* TLS_KRB5_EXPORT_WITH_DES_CBC_40_SHA */
+    "EXP-KRB5-DES-CBC-MD5",             /* TLS_KRB5_EXPORT_WITH_DES_CBC_40_MD5 */
+    "EXP-KRB5-RC2-CBC-SHA",             /* TLS_KRB5_EXPORT_WITH_RC2_CBC_40_SHA */
+    "EXP-KRB5-RC2-CBC-MD5",             /* TLS_KRB5_EXPORT_WITH_RC2_CBC_40_MD5 */
+  
+    /* blacklisted exoticas */
+    "DHE-DSS-CBC-SHA",                  /* TLS_DHE_DSS_WITH_DES_CBC_SHA */
+    "IDEA-CBC-SHA",                     /* TLS_RSA_WITH_IDEA_CBC_SHA */
+    
+    /* not really sure if the following names are correct */
+    "SSL3_CK_SCSV",                     /* TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
+    "SSL3_CK_FALLBACK_SCSV"
+};
+static size_t RFC7540_names_LEN = sizeof(RFC7540_names)/sizeof(RFC7540_names[0]);
+
+
+static apr_hash_t *BLCNames;
+
+static void cipher_init(apr_pool_t *pool)
+{
+    apr_hash_t *hash = apr_hash_make(pool);
+    const char *source;
+    unsigned int i;
+    
+    source = "rfc7540";
+    for (i = 0; i < RFC7540_names_LEN; ++i) {
+        apr_hash_set(hash, RFC7540_names[i], APR_HASH_KEY_STRING, source);
+    }
+    
+    BLCNames = hash;
+}
+
+static int cipher_is_blacklisted(const char *cipher, const char **psource)
+{   
+    *psource = apr_hash_get(BLCNames, cipher, APR_HASH_KEY_STRING);
+    return !!*psource;
+}
+
+/*******************************************************************************
+ * Hooks for processing incoming connections:
+ * - process_conn take over connection in case of h2
+ */
+static int h2_h2_process_conn(conn_rec* c);
+static int h2_h2_pre_close_conn(conn_rec* c);
+static int h2_h2_post_read_req(request_rec *r);
+static int h2_h2_late_fixups(request_rec *r);
+
+/*******************************************************************************
+ * Once per lifetime init, retrieve optional functions
+ */
+apr_status_t h2_h2_init(apr_pool_t *pool, server_rec *s)
+{
+    (void)pool;
+    ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s, "h2_h2, child_init");
+    opt_ssl_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
+    opt_ssl_var_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup);
+    
+    if (!opt_ssl_is_https || !opt_ssl_var_lookup) {
+        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
+                     APLOGNO(02951) "mod_ssl does not seem to be enabled");
+    }
+    
+    cipher_init(pool);
+    
+    return APR_SUCCESS;
+}
+
+int h2_h2_is_tls(conn_rec *c)
+{
+    return opt_ssl_is_https && opt_ssl_is_https(c);
+}
+
+int h2_is_acceptable_connection(conn_rec *c, int require_all) 
+{
+    int is_tls = h2_h2_is_tls(c);
+    const h2_config *cfg = h2_config_get(c);
+
+    if (is_tls && h2_config_geti(cfg, H2_CONF_MODERN_TLS_ONLY) > 0) {
+        /* Check TLS connection for modern TLS parameters, as defined in
+         * RFC 7540 and https://wiki.mozilla.org/Security/Server_Side_TLS#Modern_compatibility
+         */
+        apr_pool_t *pool = c->pool;
+        server_rec *s = c->base_server;
+        char *val;
+        
+        if (!opt_ssl_var_lookup) {
+            /* unable to check */
+            return 0;
+        }
+        
+        /* Need Tlsv1.2 or higher, rfc 7540, ch. 9.2
+         */
+        val = opt_ssl_var_lookup(pool, s, c, NULL, (char*)"SSL_PROTOCOL");
+        if (val && *val) {
+            if (strncmp("TLS", val, 3) 
+                || !strcmp("TLSv1", val) 
+                || !strcmp("TLSv1.1", val)) {
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03050)
+                              "h2_h2(%ld): tls protocol not suitable: %s", 
+                              (long)c->id, val);
+                return 0;
+            }
+        }
+        else if (require_all) {
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03051)
+                          "h2_h2(%ld): tls protocol is indetermined", (long)c->id);
+            return 0;
+        }
+
+        /* Check TLS cipher blacklist
+         */
+        val = opt_ssl_var_lookup(pool, s, c, NULL, (char*)"SSL_CIPHER");
+        if (val && *val) {
+            const char *source;
+            if (cipher_is_blacklisted(val, &source)) {
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03052)
+                              "h2_h2(%ld): tls cipher %s blacklisted by %s", 
+                              (long)c->id, val, source);
+                return 0;
+            }
+        }
+        else if (require_all) {
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03053)
+                          "h2_h2(%ld): tls cipher is indetermined", (long)c->id);
+            return 0;
+        }
+    }
+    return 1;
+}
+
+int h2_allows_h2_direct(conn_rec *c)
+{
+    const h2_config *cfg = h2_config_get(c);
+    int is_tls = h2_h2_is_tls(c);
+    const char *needed_protocol = is_tls? "h2" : "h2c";
+    int h2_direct = h2_config_geti(cfg, H2_CONF_DIRECT);
+    
+    if (h2_direct < 0) {
+        h2_direct = is_tls? 0 : 1;
+    }
+    return (h2_direct 
+            && ap_is_allowed_protocol(c, NULL, NULL, needed_protocol));
+}
+
+int h2_allows_h2_upgrade(conn_rec *c)
+{
+    const h2_config *cfg = h2_config_get(c);
+    int h2_upgrade = h2_config_geti(cfg, H2_CONF_UPGRADE);
+    
+    return h2_upgrade > 0 || (h2_upgrade < 0 && !h2_h2_is_tls(c));
+}
+
+/*******************************************************************************
+ * Register various hooks
+ */
+static const char* const mod_ssl[]        = { "mod_ssl.c", NULL};
+static const char* const mod_reqtimeout[] = { "mod_reqtimeout.c", NULL};
+
+void h2_h2_register_hooks(void)
+{
+    /* Our main processing needs to run quite late. Definitely after mod_ssl,
+     * as we need its connection filters, but also before reqtimeout as its
+     * method of timeouts is specific to HTTP/1.1 (as of now).
+     * The core HTTP/1 processing run as REALLY_LAST, so we will have
+     * a chance to take over before it.
+     */
+    ap_hook_process_connection(h2_h2_process_conn, 
+                               mod_ssl, mod_reqtimeout, APR_HOOK_LAST);
+    
+    /* One last chance to properly say goodbye if we have not done so
+     * already. */
+    ap_hook_pre_close_connection(h2_h2_pre_close_conn, NULL, mod_ssl, APR_HOOK_LAST);
+
+    /* With "H2SerializeHeaders On", we install the filter in this hook
+     * that parses the response. This needs to happen before any other post
+     * read function terminates the request with an error. Otherwise we will
+     * never see the response.
+     */
+    ap_hook_post_read_request(h2_h2_post_read_req, NULL, NULL, APR_HOOK_REALLY_FIRST);
+    ap_hook_fixups(h2_h2_late_fixups, NULL, NULL, APR_HOOK_LAST);
+
+    /* special bucket type transfer through a h2_bucket_beam */
+    h2_register_bucket_beamer(h2_bucket_headers_beam);
+    h2_register_bucket_beamer(h2_bucket_observer_beam);
+}
+
+int h2_h2_process_conn(conn_rec* c)
+{
+    apr_status_t status;
+    h2_ctx *ctx;
+    
+    if (c->master) {
+        return DECLINED;
+    }
+    
+    ctx = h2_ctx_get(c, 0);
+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "h2_h2, process_conn");
+    if (h2_ctx_is_task(ctx)) {
+        /* our stream pseudo connection */
+        ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c, "h2_h2, task, declined");
+        return DECLINED;
+    }
+    
+    if (!ctx && c->keepalives == 0) {
+        const char *proto = ap_get_protocol(c);
+        
+        if (APLOGctrace1(c)) {
+            ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "h2_h2, process_conn, "
+                          "new connection using protocol '%s', direct=%d, "
+                          "tls acceptable=%d", proto, h2_allows_h2_direct(c), 
+                          h2_is_acceptable_connection(c, 1));
+        }
+        
+        if (!strcmp(AP_PROTOCOL_HTTP1, proto)
+            && h2_allows_h2_direct(c) 
+            && h2_is_acceptable_connection(c, 1)) {
+            /* Fresh connection still is on http/1.1 and H2Direct is enabled. 
+             * Otherwise connection is in a fully acceptable state.
+             * -> peek at the first 24 incoming bytes
+             */
+            apr_bucket_brigade *temp;
+            char *s = NULL;
+            apr_size_t slen;
+            
+            temp = apr_brigade_create(c->pool, c->bucket_alloc);
+            status = ap_get_brigade(c->input_filters, temp,
+                                    AP_MODE_SPECULATIVE, APR_BLOCK_READ, 24);
+            
+            if (status != APR_SUCCESS) {
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c, APLOGNO(03054)
+                              "h2_h2, error reading 24 bytes speculative");
+                apr_brigade_destroy(temp);
+                return DECLINED;
+            }
+            
+            apr_brigade_pflatten(temp, &s, &slen, c->pool);
+            if ((slen >= 24) && !memcmp(H2_MAGIC_TOKEN, s, 24)) {
+                ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
+                              "h2_h2, direct mode detected");
+                if (!ctx) {
+                    ctx = h2_ctx_get(c, 1);
+                }
+                h2_ctx_protocol_set(ctx, h2_h2_is_tls(c)? "h2" : "h2c");
+            }
+            else if (APLOGctrace2(c)) {
+                ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c,
+                              "h2_h2, not detected in %d bytes(base64): %s", 
+                              (int)slen, h2_util_base64url_encode(s, slen, c->pool));
+            }
+            
+            apr_brigade_destroy(temp);
+        }
+    }
+
+    if (ctx) {
+        ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "process_conn");
+        if (!h2_ctx_session_get(ctx)) {
+            status = h2_conn_setup(ctx, c, NULL);
+            ap_log_cerror(APLOG_MARK, APLOG_TRACE1, status, c, "conn_setup");
+            if (status != APR_SUCCESS) {
+                h2_ctx_clear(c);
+                return !OK;
+            }
+        }
+        h2_conn_run(ctx, c);
+        return OK;
+    }
+    
+    ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c, "h2_h2, declined");
+    return DECLINED;
+}
+
+static int h2_h2_pre_close_conn(conn_rec *c)
+{
+    h2_ctx *ctx;
+
+    /* slave connection? */
+    if (c->master) {
+        return DECLINED;
+    }
+
+    ctx = h2_ctx_get(c, 0);
+    if (ctx) {
+        /* If the session has been closed correctly already, we will not
+         * find a h2_ctx here. The presence indicates that the session
+         * is still ongoing. */
+        return h2_conn_pre_close(ctx, c);
+    }
+    return DECLINED;
+}
+
+static void check_push(request_rec *r, const char *tag)
+{
+    const h2_config *conf = h2_config_rget(r);
+    if (!r->expecting_100 
+        && conf && conf->push_list && conf->push_list->nelts > 0) {
+        int i, old_status;
+        const char *old_line;
+        ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, 
+                      "%s, early announcing %d resources for push",
+                      tag, conf->push_list->nelts);
+        for (i = 0; i < conf->push_list->nelts; ++i) {
+            h2_push_res *push = &APR_ARRAY_IDX(conf->push_list, i, h2_push_res);
+            apr_table_add(r->headers_out, "Link", 
+                           apr_psprintf(r->pool, "<%s>; rel=preload%s", 
+                                        push->uri_ref, push->critical? "; critical" : ""));
+        }
+        old_status = r->status;
+        old_line = r->status_line;
+        r->status = 103;
+        r->status_line = "103 Early Hints";
+        ap_send_interim_response(r, 1);
+        r->status = old_status;
+        r->status_line = old_line;
+    }
+}
+
+static int h2_h2_post_read_req(request_rec *r)
+{
+    /* slave connection? */
+    if (r->connection->master) {
+        h2_ctx *ctx = h2_ctx_rget(r);
+        struct h2_task *task = h2_ctx_get_task(ctx);
+        /* This hook will get called twice on internal redirects. Take care
+         * that we manipulate filters only once. */
+        if (task && !task->filters_set) {
+            ap_filter_t *f;
+            ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r, 
+                          "h2_task(%s): adding request filters", task->id);
+
+            /* setup the correct filters to process the request for h2 */
+            ap_add_input_filter("H2_REQUEST", task, r, r->connection);
+            
+            /* replace the core http filter that formats response headers
+             * in HTTP/1 with our own that collects status and headers */
+            ap_remove_output_filter_byhandle(r->output_filters, "HTTP_HEADER");
+            ap_add_output_filter("H2_RESPONSE", task, r, r->connection);
+            
+            for (f = r->input_filters; f; f = f->next) {
+                if (!strcmp("H2_SLAVE_IN", f->frec->name)) {
+                    f->r = r;
+                    break;
+                }
+            }
+            ap_add_output_filter("H2_TRAILERS_OUT", task, r, r->connection);
+            task->filters_set = 1;
+        }
+    }
+    return DECLINED;
+}
+
+static int h2_h2_late_fixups(request_rec *r)
+{
+    /* slave connection? */
+    if (r->connection->master) {
+        h2_ctx *ctx = h2_ctx_rget(r);
+        struct h2_task *task = h2_ctx_get_task(ctx);
+        if (task) {
+            /* check if we copy vs. setaside files in this location */
+            task->output.copy_files = h2_config_geti(h2_config_rget(r), 
+                                                     H2_CONF_COPY_FILES);
+            if (task->output.copy_files) {
+                ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, task->c,
+                              "h2_slave_out(%s): copy_files on", task->id);
+                h2_beam_on_file_beam(task->output.beam, h2_beam_no_files, NULL);
+            }
+            check_push(r, "late_fixup");
+        }
+    }
+    return DECLINED;
+}
+