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45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 0a496f059c1e9d75c33cce4c1211d58422ba4f62 Mon Sep 17 00:00:00 2001
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From: Maarten de Vries <maarten+dnsmasq@m.de-vri.es>
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Date: Fri, 11 May 2018 23:20:58 +0100
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Subject: [PATCH 09/17] Do unsolicited RAs for interfaces which appear after
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dnsmasq startup.
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I noticed that dnsmasq often wasn't sending any unsolicited RAs for me.
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This turned out to happen when the interface (a bridge interface) wasn't
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created yet at the time dnsmasq started. When dnsmasq is started after
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the interface is created, it sends RAs as expected. I assume this also
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extends to other types of virtual interfaces that are created after
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dnsmasq starts.
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Digging into the source, it seems to be caused by a missing call to
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ra_start_unsolicited for non-template contexts in construct_worker from
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src/dhcp6.c. The attached patch adds that call, but only if the
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interface index or address changed to prevent doing fast RAs for no reason.
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I tested it on my own server and it appears to work as expected. When
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the interface is created and configured, dnsmasq does fast RAs for a
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while and then settles into slow RAs.
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Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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---
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src/dhcp6.c | 7 +++++++
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1 file changed, 7 insertions(+)
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--- a/src/dhcp6.c
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+++ b/src/dhcp6.c
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@@ -647,6 +647,13 @@ static int construct_worker(struct in6_a
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is_same_net6(local, &template->start6, template->prefix) &&
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is_same_net6(local, &template->end6, template->prefix))
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{
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+ /* First time found, do fast RA. */
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+ if (template->if_index != if_index || !IN6_ARE_ADDR_EQUAL(&template->local6, local))
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+ {
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+ ra_start_unsolicited(param->now, template);
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+ param->newone = 1;
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+ }
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+
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template->if_index = if_index;
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template->local6 = *local;
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}
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