Implement WebSocket reverse proxy

src/lib/websocket.h

@@ -0,0 +1,36 @@
+/**
+ * Necronda Web Server
+ * WebSocket reverse proxy (header file)
+ * src/lib/websocket.h
+ * Lorenz Stechauner, 2022-08-16
+ */
+
+#ifndef NECRONDA_SERVER_WEBSOCKET_H
+#define NECRONDA_SERVER_WEBSOCKET_H
+
+#include "sock.h"
+
+#define WS_TIMEOUT 3600
+
+const char *ws_key_uuid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+
+typedef struct {
+    unsigned char f_fin:1;
+    unsigned char f_rsv1:1;
+    unsigned char f_rsv2:1;
+    unsigned char f_rsv3:1;
+    unsigned char opcode:4;
+    unsigned char f_mask:1;
+    unsigned long len;
+    char masking_key[4];
+} ws_frame;
+
+int ws_calc_accept_key(const char *key, char *accept_key);
+
+int ws_recv_frame_header(sock *s, ws_frame *frame);
+
+int ws_send_frame_header(sock *s, ws_frame *frame);
+
+int ws_handle_connection(sock *s1, sock *s2);
+
+#endif // NECRONDA_SERVER_WEBSOCKET_H