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