Merge remote-tracking branch 'origin/topic/jazoff/packet-fuzzer'

* origin/topic/jazoff/packet-fuzzer:
  Update src/fuzzers/packet-fuzzer.cc
  Update src/fuzzers/packet-fuzzer.cc
  add initial packet corpus
  add packet fuzzer

CHANGES

@@ -1,4 +1,15 @@
 
+3.2.0-dev.547 | 2020-05-18 10:47:54 -0700
+
+  * add packet fuzzer (Justin Azoff)
+
+  * Fix building fuzz targets on macOS (Jon Siwek, Corelight)
+
+  * Highwayhash: small build fix (Johanna Amann, Corelight)
+
+    Turns out that hh_neon should not be compiled on generic arm CPUs.
+    That one is only for aarch64.
+
 3.2.0-dev.539 | 2020-05-15 19:47:55 +0000
 
   * Replace bzero() with memset() (Noah Treuhaft)

VERSION

@@ -1 +1 @@
-3.2.0-dev.539
+3.2.0-dev.547

src/fuzzers/CMakeLists.txt

@@ -79,3 +79,4 @@ target_link_libraries(zeek_fuzzer_shared
                       ${CMAKE_THREAD_LIBS_INIT} ${CMAKE_DL_LIBS})
 
 add_fuzz_target(pop3)
+add_fuzz_target(packet)

src/fuzzers/packet-fuzzer.cc

@@ -0,0 +1,45 @@
+#include "binpac.h"
+
+#include "iosource/Packet.h"
+#include "Event.h"
+#include "Sessions.h"
+
+#include "FuzzBuffer.h"
+#include "fuzzer-setup.h"
+
+#include "pcap/dlt.h"
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+	{
+	zeek::detail::FuzzBuffer fb{data, size};
+
+	if ( ! fb.Valid() )
+		return 0;
+
+	for ( ; ;  )
+		{
+		auto chunk = fb.Next();
+
+		if ( ! chunk )
+			break;
+
+		Packet pkt;
+		auto timestamp = 42;
+		pkt_timeval ts = {timestamp, 0};
+		pkt.Init(DLT_RAW, &ts, chunk->size, chunk->size, chunk->data.get(), false, "");
+
+		try
+			{
+			sessions->NextPacket(timestamp, &pkt);
+			}
+		catch ( binpac::Exception const &e )
+			{
+			}
+
+		chunk = {};
+		mgr.Drain();
+		}
+
+	zeek::detail::fuzzer_cleanup_one_input();
+	return 0;
+	}