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-rw-r--r--daemon/http.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/daemon/http.h b/daemon/http.h
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+++ 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