HTTP3: initial (experimental) support

USe configure --with-ngtcp2 or --with-quiche

Using either option will enable a HTTP3 build.
Co-authored-by: Alessandro Ghedini <alessandro@ghedini.me>

Closes #3500

1 files changed, 54 insertions, 0 deletions

diff --git a/lib/quic.h b/lib/quic.h
new file mode 100644
index 000000000..9c90b2ec5
--- /dev/null
+++ b/lib/quic.h
@@ -0,0 +1,54 @@
+#ifndef HEADER_CURL_QUIC_H
+#define HEADER_CURL_QUIC_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef ENABLE_QUIC
+#ifdef USE_NGTCP2
+#include "vquic/ngtcp2.h"
+#endif
+#ifdef USE_QUICHE
+#include "vquic/quiche.h"
+#endif
+
+#include "urldata.h"
+
+/* generic */
+const char *Curl_quic_backend(void);
+
+/* functions provided by the specific backends */
+CURLcode Curl_quic_connect(struct connectdata *conn,
+                           curl_socket_t sockfd,
+                           const struct sockaddr *addr,
+                           socklen_t addrlen);
+CURLcode Curl_quic_is_connected(struct connectdata *conn, int sockindex,
+                                bool *done);
+int Curl_quic_ver(char *p, size_t len);
+
+#else
+/* no QUIC */
+#define Curl_quic_backend() ""
+#endif
+
+#endif /* HEADER_CURL_QUIC_H */