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From 7e3250d52921b5f75bdbe0b794514bb78a209969 Mon Sep 17 00:00:00 2001
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From: Petr Mensik <pemensik@redhat.com>
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Date: Wed, 3 Jul 2019 17:02:16 +0200
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Subject: [PATCH 2/5] Compare address and interface index for allowed interface
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If interface is recreated with the same address but different index, it
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would not change any other parameter.
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Test also address family on incoming TCP queries.
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---
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src/dnsmasq.c | 3 ++-
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src/network.c | 3 ++-
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2 files changed, 4 insertions(+), 2 deletions(-)
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diff --git a/src/dnsmasq.c b/src/dnsmasq.c
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index f3d2671..7812be8 100644
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--- a/src/dnsmasq.c
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+++ b/src/dnsmasq.c
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@@ -1614,7 +1614,8 @@ static void check_dns_listeners(time_t now)
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#endif
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for (iface = daemon->interfaces; iface; iface = iface->next)
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- if (iface->index == if_index)
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+ if (iface->index == if_index &&
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+ iface->addr.sa.sa_family == tcp_addr.sa.sa_family)
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break;
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if (!iface && !loopback_exception(listener->tcpfd, tcp_addr.sa.sa_family, &addr, intr_name))
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diff --git a/src/network.c b/src/network.c
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index fd90288..f247811 100644
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--- a/src/network.c
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+++ b/src/network.c
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@@ -404,10 +404,11 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
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/* check whether the interface IP has been added already
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we call this routine multiple times. */
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for (iface = daemon->interfaces; iface; iface = iface->next)
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- if (sockaddr_isequal(&iface->addr, addr))
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+ if (sockaddr_isequal(&iface->addr, addr) && iface->index == if_index)
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{
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iface->dad = !!(iface_flags & IFACE_TENTATIVE);
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iface->found = 1; /* for garbage collection */
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+ iface->netmask = netmask;
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return 1;
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}
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--
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2.20.1
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