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sctp: Unmask upper DSCP bits in sctp_v4_get_dst()

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Unmask the upper DSCP bits when calling ip_route_output_key() so that in
the future it could perform the FIB lookup according to the full DSCP
value.

Note that the 'tos' variable holds the full DS field.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2024-09-05 19:51:40 +03:00 committed by David S. Miller
parent 2c60fc9ca2
commit 8b6d13cc8b
1 changed files with 2 additions and 1 deletions
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3
net/sctp/protocol.c
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@ -44,6 +44,7 @@
#include <net/inet_common.h>
#include <net/inet_ecn.h>
#include <net/udp_tunnel.h>
#include <net/inet_dscp.h>
#define MAX_SCTP_PORT_HASH_ENTRIES (64 * 1024)
@ -435,7 +436,7 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
fl4->fl4_dport = daddr->v4.sin_port;
fl4->flowi4_proto = IPPROTO_SCTP;
if (asoc) {
fl4->flowi4_tos = RT_TOS(tos);
fl4->flowi4_tos = tos & INET_DSCP_MASK;
fl4->flowi4_scope = ip_sock_rt_scope(asoc->base.sk);
fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if;
fl4->fl4_sport = htons(asoc->base.bind_addr.port);