MdeModulePkg/Network: Add 32bit subnet mask support for IP4 PXE boot.

[mirror_edk2.git] / MdeModulePkg / Include / Library / NetLib.h

diff --git a/MdeModulePkg/Include/Library/NetLib.h b/MdeModulePkg/Include/Library/NetLib.h
index ef7bc429c13826c94b3a39a842e9718948af3b75..b7ef99c7b568e016682c289e7edbe37565635e33 100644 (file)
--- a/MdeModulePkg/Include/Library/NetLib.h
+++ b/MdeModulePkg/Include/Library/NetLib.h
@@ -422,8 +422,9 @@ NetGetIpClass (
 \r
   If all bits of the host address of IP are 0 or 1, IP is also not a valid unicast address,\r
   except when the originator is one of the endpoints of a point-to-point link with a 31-bit\r
-  mask (RFC3021).\r
-\r
+  mask (RFC3021), or a 32bit NetMask (all 0xFF) is used for special network environment (e.g.\r
+  PPP link).\r
+  \r
   @param[in]  Ip                    The IP to check against.\r
   @param[in]  NetMask               The mask of the IP.\r
 \r