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bareudp: use ports to lookup route

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The source and destination ports should be taken into account when
determining the route destination; they can affect the result, for
example in case there are routing rules defined.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20231025094441.417464-1-b.galvani@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Beniamino Galvani 2023-10-25 11:44:41 +02:00 committed by Paolo Abeni
parent 3967336126
commit ef113733c2
1 changed files with 16 additions and 13 deletions
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29
drivers/net/bareudp.c
View file

@ -306,8 +306,11 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (!sock)
return -ESHUTDOWN;
sport = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min, USHRT_MAX,
true);
rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, 0, &saddr, &info->key,
0, 0, key->tos,
sport, bareudp->port, key->tos,
use_cache ?
(struct dst_cache *)&info->dst_cache : NULL);
@ -317,9 +320,6 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev,
skb_tunnel_check_pmtu(skb, &rt->dst,
BAREUDP_IPV4_HLEN + info->options_len, false);
sport = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min, USHRT_MAX,
true);
tos = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
ttl = key->ttl;
df = key->tun_flags & TUNNEL_DONT_FRAGMENT ? htons(IP_DF) : 0;
@ -371,8 +371,11 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
if (!sock)
return -ESHUTDOWN;
sport = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min, USHRT_MAX,
true);
dst = udp_tunnel6_dst_lookup(skb, dev, bareudp->net, sock, 0, &saddr,
key, 0, 0, key->tos,
key, sport, bareudp->port, key->tos,
use_cache ?
(struct dst_cache *) &info->dst_cache : NULL);
if (IS_ERR(dst))
@ -381,9 +384,6 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
skb_tunnel_check_pmtu(skb, dst, BAREUDP_IPV6_HLEN + info->options_len,
false);
sport = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min, USHRT_MAX,
true);
prio = ip_tunnel_ecn_encap(key->tos, ip_hdr(skb), skb);
ttl = key->ttl;
@ -480,15 +480,20 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
struct ip_tunnel_info *info = skb_tunnel_info(skb);
struct bareudp_dev *bareudp = netdev_priv(dev);
bool use_cache;
__be16 sport;
use_cache = ip_tunnel_dst_cache_usable(skb, info);
sport = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min, USHRT_MAX,
true);
if (!ipv6_mod_enabled() || ip_tunnel_info_af(info) == AF_INET) {
struct rtable *rt;
__be32 saddr;
rt = udp_tunnel_dst_lookup(skb, dev, bareudp->net, 0, &saddr,
&info->key, 0, 0, info->key.tos,
&info->key, sport, bareudp->port,
info->key.tos,
use_cache ? &info->dst_cache : NULL);
if (IS_ERR(rt))
return PTR_ERR(rt);
@ -502,7 +507,7 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
dst = udp_tunnel6_dst_lookup(skb, dev, bareudp->net, sock,
0, &saddr, &info->key,
0, 0, info->key.tos,
sport, bareudp->port, info->key.tos,
use_cache ? &info->dst_cache : NULL);
if (IS_ERR(dst))
return PTR_ERR(dst);
@ -513,9 +518,7 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
return -EINVAL;
}
info->key.tp_src = udp_flow_src_port(bareudp->net, skb,
bareudp->sport_min,
USHRT_MAX, true);
info->key.tp_src = sport;
info->key.tp_dst = bareudp->port;
return 0;
}