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b717b1361d
Do not renew the dhcp on bridge topology change as this causes some of the dhcp servers to fail. This occurs when many interfaces are added on to a bridge and for every interface there is a dhcp renew. The server considers receiving renew many times in a quick succession as a DOS attack. So for now we disable dhcp lease renew when a new interface is added. Signed-off-by: Chaitanya Godavarthi <chaitanya.kiran@netexperience.com>
47 lines
1.9 KiB
Diff
47 lines
1.9 KiB
Diff
From 5380b0204d97a79669243b46a8750e038e6a0a19 Mon Sep 17 00:00:00 2001
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From: Chaitanya Godavarthi <chaitanya.kiran@netexperience.com>
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Date: Wed, 14 Apr 2021 11:14:45 -0400
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Subject: [PATCH] netifd: Dont renew dhcp on bridge topo change
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Do not renew the dhcp on bridge topology change
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as this causes some of the dhcp servers to fail.
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This occurs when many interfaces are added on to
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a bridge and for every interface there is a dhcp
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renew. The server considers receiving renew many
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times in a quick succession as a DOS attack. So for
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now we disable dhcp lease renew when a new interface
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is added.
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Signed-off-by: Chaitanya Godavarthi <chaitanya.kiran@netexperience.com>
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---
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.../netifd/patches/0104-fix-dhcp-issue.patch | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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create mode 100644 package/network/config/netifd/patches/0104-fix-dhcp-issue.patch
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diff --git a/package/network/config/netifd/patches/0104-fix-dhcp-issue.patch b/package/network/config/netifd/patches/0104-fix-dhcp-issue.patch
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new file mode 100644
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index 0000000000..6f1d2e708e
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--- /dev/null
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+++ b/package/network/config/netifd/patches/0104-fix-dhcp-issue.patch
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@@ -0,0 +1,17 @@
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+Index: netifd-2019-08-05-5e02f944/interface.c
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+===================================================================
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+--- netifd-2019-08-05-5e02f944.orig/interface.c
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++++ netifd-2019-08-05-5e02f944/interface.c
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+@@ -424,7 +424,11 @@ interface_main_dev_cb(struct device_user
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+ interface_set_link_state(iface, false);
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+ break;
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+ case DEV_EVENT_TOPO_CHANGE:
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+- interface_proto_event(iface->proto, PROTO_CMD_RENEW, false);
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++ /* This renews the dhcp lease when the bridge adds/deletes a
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++ * new interface. It causes some dhcp servers to fail in
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++ * case where there are many interfaces being added to the
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++ * bridge frequently. Disabling this for now. */
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++ /* interface_proto_event(iface->proto, PROTO_CMD_RENEW, false); */
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+ return;
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+ default:
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+ break;
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--
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2.25.1
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