Use siaddr in DHCP packet, if zero, use option 54 instead.

[mirror_edk2.git] / MdeModulePkg / Universal / Network / UefiPxeBcDxe / PxeBcImpl.c

diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
index 3eeacdcc5c8065c51c56213b5a7dee9d9fb03db0..659f638930eaac63a506075ff835476ea62fb5cb 100644 (file)
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
@@ -2480,9 +2480,11 @@ DiscoverBootFile (
   }\r
 \r
   //\r
-  // use option 54, if zero, use siaddr in header\r
+  // Use siaddr(next server) in DHCPOFFER packet header, if zero, use option 54(server identifier)\r
+  // in DHCPOFFER packet.\r
+  // (It does not comply with PXE Spec, Ver2.1)\r
   //\r
-  if (Packet->Dhcp4Option[PXEBC_DHCP4_TAG_INDEX_SERVER_ID] != NULL) {\r
+  if (EFI_IP4_EQUAL (&Packet->Packet.Offer.Dhcp4.Header.ServerAddr, &mZeroIp4Addr)) {\r
     CopyMem (\r
       &Private->ServerIp,\r
       Packet->Dhcp4Option[PXEBC_DHCP4_TAG_INDEX_SERVER_ID]->Data,\r