6 files changed, 46 insertions, 3 deletions
diff --git a/protocols/WhatsAppWeb/WhatsAppWeb.vcxproj b/protocols/WhatsAppWeb/WhatsAppWeb.vcxproj
index 4929d9f266..a10c683edb 100644
--- a/protocols/WhatsAppWeb/WhatsAppWeb.vcxproj
+++ b/protocols/WhatsAppWeb/WhatsAppWeb.vcxproj
@@ -28,6 +28,9 @@
     <ProjectReference Include="..\..\libs\libsodium\libsodium.vcxproj">
       <Project>{a185b162-6cb6-4502-b03f-b56f7699a8d9}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\..\libs\zlib\zlib.vcxproj">
+      <Project>{e2a369cd-eda3-414f-8ad0-e732cd7ee68c}</Project>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <Image Include="res\whatsapp.ico" />
diff --git a/protocols/WhatsAppWeb/src/pmsg.pb.h b/protocols/WhatsAppWeb/src/pmsg.pb.h
index eb2dc778b6..5402ec1abf 100644
--- a/protocols/WhatsAppWeb/src/pmsg.pb.h
+++ b/protocols/WhatsAppWeb/src/pmsg.pb.h
@@ -6590,7 +6590,7 @@ class ClientPayload_UserAgent final :
     ClientPayload_UserAgent_Platform_KAIOS;
   static constexpr Platform SMB_IOS =
     ClientPayload_UserAgent_Platform_SMB_IOS;
-  static constexpr Platform WINDOWS =
+  static constexpr Platform WINDA =
     ClientPayload_UserAgent_Platform_WINDOWS;
   static constexpr Platform WEB =
     ClientPayload_UserAgent_Platform_WEB;
diff --git a/protocols/WhatsAppWeb/src/proto.h b/protocols/WhatsAppWeb/src/proto.h
index fdafe61568..137c42e60e 100644
--- a/protocols/WhatsAppWeb/src/proto.h
+++ b/protocols/WhatsAppWeb/src/proto.h
@@ -226,6 +226,9 @@ class WhatsAppProto : public PROTO<WhatsAppProto>
 	// Binary packets
 	void ProcessBinaryPacket(const void *pData, size_t cbLen);
 
+	// unzip operations
+	MBinBuffer unzip(const MBinBuffer &src);
+
 	/// Avatars ////////////////////////////////////////////////////////////////////////////
 	CMStringW GetAvatarFileName(MCONTACT hContact);
 
diff --git a/protocols/WhatsAppWeb/src/server.cpp b/protocols/WhatsAppWeb/src/server.cpp
index 663a10901f..f6ca1ef948 100644
--- a/protocols/WhatsAppWeb/src/server.cpp
+++ b/protocols/WhatsAppWeb/src/server.cpp
@@ -196,8 +196,9 @@ void WhatsAppProto::ProcessBinaryPacket(const void *pData, size_t cbDataLen)
 			WAReader rdr(buf.data(), buf.length());
 			auto b = rdr.readInt8();
 			if (b & 2) {
-				debugLogA("zipped nodes are not supported");
-				return;
+				buf.remove(1);
+				buf = unzip(buf);
+				rdr = WAReader(buf.data(), buf.length());
 			}
 
 			if (WANode *pNode = rdr.readNode()) {
diff --git a/protocols/WhatsAppWeb/src/stdafx.h b/protocols/WhatsAppWeb/src/stdafx.h
index 17ab137be9..a463e5ea64 100644
--- a/protocols/WhatsAppWeb/src/stdafx.h
+++ b/protocols/WhatsAppWeb/src/stdafx.h
@@ -59,6 +59,8 @@ Copyright © 2019-22 George Hazan
 
 #include "../../libs/libsodium/src/include/sodium.h"
 
+#include "../../libs/zlib/src/zlib.h"
+
 /////////////////////////////////////////////////////////////////////////////////////////
 // to obtain protobuf library do the following
 // - install vcpkg (https://github.com/microsoft/vcpkg);
diff --git a/protocols/WhatsAppWeb/src/utils.cpp b/protocols/WhatsAppWeb/src/utils.cpp
index 4c8fb5d8ca..509f277f49 100644
--- a/protocols/WhatsAppWeb/src/utils.cpp
+++ b/protocols/WhatsAppWeb/src/utils.cpp
@@ -344,3 +344,37 @@ void WhatsAppProto::Popup(MCONTACT hContact, const wchar_t *szMsg, const wchar_t
 	ppd.hContact = hContact;
 	Popup_AddClass(&ppd);
 }
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+MBinBuffer WhatsAppProto::unzip(const MBinBuffer &src)
+{
+	z_stream strm = {};
+	inflateInit(&strm);
+
+	strm.avail_in = src.length();
+	strm.next_in = (Bytef *)src.data();
+
+	MBinBuffer res;
+	Bytef buf[2048];
+
+	while (strm.avail_in > 0) {
+		strm.avail_out = sizeof(buf);
+		strm.next_out = buf;
+
+		int ret = inflate(&strm, Z_NO_FLUSH);
+		switch (ret) {
+		case Z_NEED_DICT:
+			ret = Z_DATA_ERROR;     /* and fall through */
+		case Z_DATA_ERROR:
+		case Z_MEM_ERROR:
+			inflateEnd(&strm);
+			return ret;
+		}
+
+		res.append(buf, sizeof(buf) - strm.avail_out);
+	}
+
+	inflateEnd(&strm);
+	return res;
+}
+\ No newline at end of file