Reviewed-by: Siyuan Fu <siyuan...@intel.com> > -----Original Message----- > From: Maciej Rabeda <maciej.rab...@linux.intel.com> > Sent: 2020年8月20日 0:54 > To: devel@edk2.groups.io > Cc: Wu, Jiaxin <jiaxin...@intel.com>; Fu, Siyuan <siyuan...@intel.com> > Subject: [PATCH v1] NetworkPkg/UefiPxeBcDxe: Fix PXE_BOOT_SERVERS usage > in boot info parse flow > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2876 > > According to PXE 2.1 spec, DHCP option 43, tag 6 (PXE_DISCOVERY_CONTROL), > bit 3 specifies whether PXE client should use/accept TFTP servers defined > within PXE_BOOT_SERVERS list (tag 8). This bit was not being taken into > account when choosing boot server IP in PxeBcDhcp4BootInfo(). > > Cc: Jiaxin Wu <jiaxin...@intel.com> > Cc: Siyuan Fu <siyuan...@intel.com> > Signed-off-by: Maciej Rabeda <maciej.rab...@linux.intel.com> > --- > NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c | 10 +++++++--- > 1 file changed, 7 insertions(+), 3 deletions(-) > > diff --git a/NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c > b/NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c > index d062a526077b..ed9bca0f7de3 100644 > --- a/NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c > +++ b/NetworkPkg/UefiPxeBcDxe/PxeBcBoot.c > @@ -499,12 +499,16 @@ PxeBcDhcp4BootInfo ( > > > // > > // Parse the boot server address. > > - // If prompt/discover is disabled, get the first boot server from the boot > servers list. > > - // Otherwise, parse the boot server Ipv4 address from next server address > field > in DHCP header. > > + // If prompt/discover is disabled, server list should be used and is > present > (DHCP option 43), > > + // get the first boot server from the boot servers list. > > + // Otherwise, parse the boot server IPv4 address from next server address > field in DHCP header. > > // If all these fields are not available, use option 54 instead. > > // > > VendorOpt = &Cache4->VendorOpt; > > - if (IS_DISABLE_PROMPT_MENU (VendorOpt->DiscoverCtrl) && > IS_VALID_BOOT_SERVERS (VendorOpt->BitMap)) { > > + if (IS_DISABLE_PROMPT_MENU (VendorOpt->DiscoverCtrl) && > > + IS_VALID_BOOT_SERVERS (VendorOpt->BitMap) && > > + IS_ENABLE_USE_SERVER_LIST (VendorOpt->DiscoverCtrl)) > > + { > > Entry = VendorOpt->BootSvr; > > if (VendorOpt->BootSvrLen >= sizeof (PXEBC_BOOT_SVR_ENTRY) && Entry- > >IpCnt > 0) { > > CopyMem ( > > -- > 2.24.0.windows.2
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