Remove header checks out of net_processing

This moves header size and netmagic checking out of net_processing and
into net.  This check now runs in ReadHeader, so that net can exit early
out of receiving bytes from the peer.  IsValid is now slimmed down, so
it no longer needs a MessageStartChars& parameter.

Additionally this removes the rest of the m_valid_* members from
CNetMessage.

2 files changed, 1 insertions, 8 deletions

diff --git a/src/test/fuzz/deserialize.cpp b/src/test/fuzz/deserialize.cpp
index f87b7576a4..b799d3b43b 100644
--- a/src/test/fuzz/deserialize.cpp
+++ b/src/test/fuzz/deserialize.cpp
@@ -189,10 +189,9 @@ void test_one_input(const std::vector<uint8_t>& buffer)
         DeserializeFromFuzzingInput(buffer, s);
         AssertEqualAfterSerializeDeserialize(s);
 #elif MESSAGEHEADER_DESERIALIZE
-        const CMessageHeader::MessageStartChars pchMessageStart = {0x00, 0x00, 0x00, 0x00};
         CMessageHeader mh;
         DeserializeFromFuzzingInput(buffer, mh);
-        (void)mh.IsValid(pchMessageStart);
+        (void)mh.IsCommandValid();
 #elif ADDRESS_DESERIALIZE
         CAddress a;
         DeserializeFromFuzzingInput(buffer, a);
diff --git a/src/test/fuzz/p2p_transport_deserializer.cpp b/src/test/fuzz/p2p_transport_deserializer.cpp
index 6252b8e91b..7e216e16fe 100644
--- a/src/test/fuzz/p2p_transport_deserializer.cpp
+++ b/src/test/fuzz/p2p_transport_deserializer.cpp
@@ -39,12 +39,6 @@ void test_one_input(const std::vector<uint8_t>& buffer)
                 assert(result->m_raw_message_size <= buffer.size());
                 assert(result->m_raw_message_size == CMessageHeader::HEADER_SIZE + result->m_message_size);
                 assert(result->m_time == m_time);
-                if (result->m_valid_header) {
-                    assert(result->m_valid_netmagic);
-                }
-                if (!result->m_valid_netmagic) {
-                    assert(!result->m_valid_header);
-                }
             }
         }
     }