diff options
| author | Shijie Luo <luoshijie1@huawei.com> | 2019-06-18 18:14:04 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-24 19:02:47 +0300 |
| commit | 650638a7c6e60a198573873972aafb065f200056 (patch) | |
| tree | 166e0579777bd8bc91309f9da84dd8420f7c22b0 | |
| parent | d8c444d540beaa39aff834c5b83df7e86a1ae765 (diff) | |
| download | linux-650638a7c6e60a198573873972aafb065f200056.tar.xz | |
ipv4: fix confirm_addr_indev() when enable route_localnet
When arp_ignore=3, the NIC won't reply for scope host addresses, but
if enable route_locanet, we need to reply ip address with head 127 and
scope RT_SCOPE_HOST.
Fixes: d0daebc3d622 ("ipv4: Add interface option to enable routing of 127.0.0.0/8")
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/devinet.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 6fd4628d10b9..7874303220c5 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1356,14 +1356,20 @@ EXPORT_SYMBOL(inet_select_addr); static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, __be32 local, int scope) { + unsigned char localnet_scope = RT_SCOPE_HOST; const struct in_ifaddr *ifa; __be32 addr = 0; int same = 0; + if (unlikely(IN_DEV_ROUTE_LOCALNET(in_dev))) + localnet_scope = RT_SCOPE_LINK; + in_dev_for_each_ifa_rcu(ifa, in_dev) { + unsigned char min_scope = min(ifa->ifa_scope, localnet_scope); + if (!addr && (local == ifa->ifa_local || !local) && - ifa->ifa_scope <= scope) { + min_scope <= scope) { addr = ifa->ifa_local; if (same) break; @@ -1378,7 +1384,7 @@ static __be32 confirm_addr_indev(struct in_device *in_dev, __be32 dst, if (inet_ifa_match(addr, ifa)) break; /* No, then can we use new local src? */ - if (ifa->ifa_scope <= scope) { + if (min_scope <= scope) { addr = ifa->ifa_local; break; } |