#include <vnet/ip/ip_flow_hash.h>
#include <vnet/ip/ip4_packet.h>
+#include <vnet/tcp/tcp_packet.h>
+#include <vnet/udp/udp_packet.h>
#define IP_DF 0x4000 /* don't fragment */
flow_hash_config_t flow_hash_config)
{
tcp_header_t *tcp = (void *) (ip + 1);
+ udp_header_t *udp = (void *) (ip + 1);
+ gtpv1u_header_t *gtpu = (void *) (udp + 1);
u32 a, b, c, t1, t2;
- uword is_tcp_udp = (ip->protocol == IP_PROTOCOL_TCP
- || ip->protocol == IP_PROTOCOL_UDP);
+ uword is_udp = ip->protocol == IP_PROTOCOL_UDP;
+ uword is_tcp_udp = (ip->protocol == IP_PROTOCOL_TCP || is_udp);
t1 = (flow_hash_config & IP_FLOW_HASH_SRC_ADDR)
? ip->src_address.data_u32 : 0;
b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0;
c = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ?
(t1 << 16) | t2 : (t2 << 16) | t1;
+ if (PREDICT_TRUE (is_udp) &&
+ PREDICT_FALSE ((flow_hash_config & IP_FLOW_HASH_GTPV1_TEID) &&
+ udp->dst_port == GTPV1_PORT_BE))
+ {
+ t1 = gtpu->teid;
+ c ^= t1;
+ }
a ^= ip_flow_hash_router_id;
hash_v3_mix32 (a, b, c);