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network: also check addresses when determine a gateway address is reachable or not

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Fixes #20201.
This commit is contained in:
Yu Watanabe 2021-07-12 15:46:44 +09:00
parent 9de0c7f4ae
commit 11046cea14
1 changed files with 34 additions and 0 deletions
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34
src/network/networkd-route.c
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@ -746,6 +746,26 @@ static bool route_address_is_reachable(const Route *route, int family, const uni
FAMILY_ADDRESS_SIZE(family) * 8) > 0;
}
static bool prefix_route_address_is_reachable(const Address *a, int family, const union in_addr_union *address) {
assert(a);
assert(IN_SET(family, AF_INET, AF_INET6));
assert(address);
if (a->family != family)
return false;
if (FLAGS_SET(a->flags, IFA_F_NOPREFIXROUTE))
return false;
if (in_addr_is_set(a->family, &a->in_addr_peer))
return false;
return in_addr_prefix_intersect(
family,
&a->in_addr,
a->prefixlen,
address,
FAMILY_ADDRESS_SIZE(family) * 8) > 0;
}
bool manager_address_is_reachable(Manager *manager, int family, const union in_addr_union *address) {
Link *link;
@ -764,6 +784,20 @@ bool manager_address_is_reachable(Manager *manager, int family, const union in_a
return true;
}
/* If we do not manage foreign routes, then there may exist a prefix route we do not know,
* which was created on configuring an address. Hence, also check the addresses. */
if (!manager->manage_foreign_routes)
HASHMAP_FOREACH(link, manager->links_by_index) {
Address *a;
SET_FOREACH(a, link->addresses)
if (prefix_route_address_is_reachable(a, family, address))
return true;
SET_FOREACH(a, link->addresses_foreign)
if (prefix_route_address_is_reachable(a, family, address))
return true;
}
return false;
}