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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: RHEL Ninjas <example@example.com>
Date: Fri, 25 Sep 2015 16:24:23 +0900
Subject: [PATCH] efinet: add filter for the first exclusive reopen of SNP
---
grub-core/net/drivers/efi/efinet.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/grub-core/net/drivers/efi/efinet.c b/grub-core/net/drivers/efi/efinet.c
index c3a128cd1dc..d8099a59855 100644
--- a/grub-core/net/drivers/efi/efinet.c
+++ b/grub-core/net/drivers/efi/efinet.c
@@ -407,6 +407,30 @@ grub_efi_net_config_real (grub_efi_handle_t hnd, char **device,
if (net->mode->state == GRUB_EFI_NETWORK_STARTED
&& efi_call_3 (net->initialize, net, 0, 0) != GRUB_EFI_SUCCESS)
continue;
+
+ /* Enable hardware receive filters if driver declares support for it.
+ We need unicast and broadcast and additionaly all nodes and
+ solicited multicast for IPv6. Solicited multicast is per-IPv6
+ address and we currently do not have API to do it so simply
+ try to enable receive of all multicast packets or evertyhing in
+ the worst case (i386 PXE driver always enables promiscuous too).
+
+ This does trust firmware to do what it claims to do.
+ */
+ if (net->mode->receive_filter_mask)
+ {
+ grub_uint32_t filters = GRUB_EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
+
+ filters &= net->mode->receive_filter_mask;
+ if (!(filters & GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST))
+ filters |= (net->mode->receive_filter_mask &
+ GRUB_EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS);
+
+ efi_call_6 (net->receive_filters, net, filters, 0, 0, 0, NULL);
+ }
+
card->efi_net = net;
}
return;