1 files changed, 85 insertions, 0 deletions
diff --git a/daemon/http.h b/daemon/http.h
new file mode 100644
index 0000000..0749e3b
--- /dev/null
+++ b/daemon/http.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) CZ.NIC, z.s.p.o
+ *
+ * Initial Author: Jan Hák <jan.hak@nic.cz>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <uv.h>
+#include <libknot/packet/pkt.h>
+
+#if ENABLE_DOH2
+#include <nghttp2/nghttp2.h>
+#endif
+
+#include "lib/generic/queue.h"
+#include "lib/generic/trie.h"
+
+/** Transport session (opaque). */
+struct session;
+
+typedef ssize_t(*http_send_callback)(const uint8_t *buffer,
+				     const size_t buffer_len,
+				     struct session *session);
+
+struct http_stream {
+	int32_t id;
+	kr_http_header_array_t *headers;
+};
+
+typedef queue_t(struct http_stream) queue_http_stream;
+
+typedef enum {
+	HTTP_METHOD_NONE = 0,
+	HTTP_METHOD_GET = 1,
+	HTTP_METHOD_POST = 2,
+	HTTP_METHOD_HEAD = 3, /**< Same as GET, except it does not return payload.
+			       * Required to be implemented by RFC 7231. */
+} http_method_t;
+
+/** HTTP status codes returned by kresd.
+ * This is obviously non-exhaustive of all HTTP status codes, feel free to add
+ * more if needed. */
+enum http_status {
+	HTTP_STATUS_OK                              = 200,
+	HTTP_STATUS_BAD_REQUEST                     = 400,
+	HTTP_STATUS_NOT_FOUND                       = 404,
+	HTTP_STATUS_PAYLOAD_TOO_LARGE               = 413,
+	HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE          = 415,
+	HTTP_STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
+	HTTP_STATUS_NOT_IMPLEMENTED                 = 501,
+};
+
+struct http_ctx {
+	struct nghttp2_session *h2;
+	http_send_callback send_cb;
+	struct session *session;
+	queue_http_stream streams;  /* Streams present in the wire buffer. */
+	trie_t *stream_write_data;  /* Dictionary of stream data that needs to be freed after write. */
+	int32_t incomplete_stream;
+	int32_t last_stream;   /* The last used stream - mostly the same as incomplete_stream, but can be used after
+				  completion for sending HTTP status codes. */
+	ssize_t submitted;
+	http_method_t current_method;
+	char *uri_path;
+	kr_http_header_array_t *headers;
+	uint8_t *buf;  /* Part of the wire_buf that belongs to current HTTP/2 stream. */
+	ssize_t buf_pos;
+	ssize_t buf_size;
+	enum http_status status;
+	bool streaming;             /* True: not all data in the stream has been received yet. */
+};
+
+#if ENABLE_DOH2
+struct http_ctx* http_new(struct session *session, http_send_callback send_cb);
+int http_process_input_data(struct session *session, const uint8_t *buf, ssize_t nread,
+			    ssize_t *out_submitted);
+int http_send_status(struct session *session, enum http_status status);
+int http_write(uv_write_t *req, uv_handle_t *handle, knot_pkt_t* pkt, int32_t stream_id,
+	       uv_write_cb on_write);
+void http_free(struct http_ctx *ctx);
+void http_free_headers(kr_http_header_array_t *headers);
+#endif