NITWORK/RFC: Fix missing check of too big uncompressed datas and fix rfc

PATCH

Author: romainpanno

docs/network/rfc/RFC.md

@@ -142,9 +142,9 @@ Table of Contents
 
 2.  Network Packet Global Structure
 
-    The packet are send compressed thanks to zstd library over the network
-    with the UDP protocol. And the packet are decompressed thanks to zstd
-    when received.
+    The packets are compressed using the zstd library before being sent over
+    the network using the UDP protocol. Upon receipt, the packets are
+    decompressed using the zstd library
     To add some better reliability, each packet sent has a header with some
     information about all the packets received.
 

src/Nitwork/Zstd.hpp

@@ -22,6 +22,9 @@ namespace Nitwork {
                 if (!std::is_standard_layout_v<T> || !std::is_trivial_v<T>) {
                     throw std::runtime_error("ZSTD: Data must be POD");
                 }
+                if (sizeof(T) > ZSTD_compressBound(sizeof(T))) {
+                    throw std::runtime_error("ZSTD: Input data is too large");
+                }
                 size_t const compressedSize = ZSTD_compressBound(sizeof(T));
                 std::vector<char> compressedData(compressedSize);
                 size_t const result = ZSTD_compress(