Add additional delay in DHCP6 InfoRequest interface to wait for link local address...

[mirror_edk2.git] / NetworkPkg / Dhcp6Dxe / Dhcp6Utility.c

diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
index 6bf96a19966d33cd7a6d203d006e2eed0ccfa092..4c32028680d078dede26e225b73e24b3dd110425 100644 (file)
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Utility.c
@@ -1189,3 +1189,42 @@ Dhcp6AppendCacheIa (
     Instance->IaCb.Ia  = NewIa;\r
   }\r
 }\r
+\r
+/**\r
+  Calculate the Dhcp6 get mapping timeout by adding additinal delay to the IP6 DAD transmits count.\r
+\r
+  @param[in]   Ip6Cfg              The pointer to Ip6 config protocol.\r
+  @param[out]  TimeOut             The time out value in 100ns units.\r
+\r
+  @retval   EFI_INVALID_PARAMETER  Input parameters are invalid.\r
+  @retval   EFI_SUCCESS            Calculate the time out value successfully.\r
+**/\r
+EFI_STATUS\r
+Dhcp6GetMappingTimeOut (\r
+  IN  EFI_IP6_CONFIG_PROTOCOL       *Ip6Cfg,\r
+  OUT UINTN                         *TimeOut\r
+  ) \r
+{\r
+  EFI_STATUS            Status;\r
+  UINTN                 DataSize;\r
+  EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS    DadXmits;\r
+\r
+  if (Ip6Cfg == NULL || TimeOut == NULL) {\r
+    return EFI_INVALID_PARAMETER;\r
+  }\r
+\r
+  DataSize = sizeof (EFI_IP6_CONFIG_DUP_ADDR_DETECT_TRANSMITS);\r
+  Status = Ip6Cfg->GetData (\r
+                     Ip6Cfg,\r
+                     Ip6ConfigDataTypeDupAddrDetectTransmits,\r
+                     &DataSize,\r
+                     &DadXmits\r
+                     );\r
+  if (EFI_ERROR (Status)) {\r
+    return Status;\r
+  }\r
+  \r
+  *TimeOut = TICKS_PER_SECOND * DadXmits.DupAddrDetectTransmits + DHCP6_DAD_ADDITIONAL_DELAY;\r
+  \r
+  return EFI_SUCCESS;\r
+}\r