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-rw-r--r--src/win/winsock.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/win/winsock.h b/src/win/winsock.h
index 7ecb755..2af9588 100644
--- a/src/win/winsock.h
+++ b/src/win/winsock.h
@@ -54,6 +54,14 @@
# define SIO_BASE_HANDLE 0x48000022
#endif
+#ifndef MCAST_JOIN_SOURCE_GROUP
+# define MCAST_JOIN_SOURCE_GROUP 45
+#endif
+
+#ifndef MCAST_LEAVE_SOURCE_GROUP
+# define MCAST_LEAVE_SOURCE_GROUP 46
+#endif
+
/*
* TDI defines that are only in the DDK.
* We only need receive flags so far.