The function calls flowi4_init_output() to initialize an IPv4 flow key
with which it then performs a FIB lookup using ip_route_output_flow().
The 'tos' variable with which the TOS value in the IPv4 flow key
(flowi4_tos) is initialized contains the full DS field. Unmask the upper
DSCP bits so that in the future the FIB lookup could be performed
according to the full DSCP value.
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx>
Reviewed-by: Guillaume Nault <gnault@xxxxxxxxxx>
---
net/ipv6/sit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 83b195f09561..3b2eed7fc765 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -51,6 +51,7 @@
#include <net/dsfield.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
+#include <net/inet_dscp.h>
/*
This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c
@@ -935,8 +936,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
}
flowi4_init_output(&fl4, tunnel->parms.link, tunnel->fwmark,
- RT_TOS(tos), RT_SCOPE_UNIVERSE, IPPROTO_IPV6,
- 0, dst, tiph->saddr, 0, 0,
+ tos & INET_DSCP_MASK, RT_SCOPE_UNIVERSE,
+ IPPROTO_IPV6, 0, dst, tiph->saddr, 0, 0,
sock_net_uid(tunnel->net, NULL));
rt = dst_cache_get_ip4(&tunnel->dst_cache, &fl4.saddr);
--
2.46.0
