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authorBenoît Ganne <bganne@cisco.com>2023-08-02 11:31:46 +0200
committerBeno�t Ganne <bganne@cisco.com>2024-02-22 08:24:02 +0000
commit89c7b545dd3333092e718e2a9194ed72c27a54f7 (patch)
tree33d3982d43df469e5ab2f5eea5ac0df699241e47 /src/vnet/ip
parent8074fc6209c97eba0d4d5e8391cae0f5fb61a5c4 (diff)
ip6: ECMP hash support for ipv6 fragments
Type: improvement Change-Id: I41f70e5977fedbf0050205ebe52126ef373ebc06 Signed-off-by: Benoît Ganne <bganne@cisco.com>
Diffstat (limited to 'src/vnet/ip')
-rw-r--r--src/vnet/ip/ip6_inlines.h31
-rw-r--r--src/vnet/ip/ip6_packet.h7
2 files changed, 27 insertions, 11 deletions
diff --git a/src/vnet/ip/ip6_inlines.h b/src/vnet/ip/ip6_inlines.h
index 4a2b91b9ec9..9bd475224eb 100644
--- a/src/vnet/ip/ip6_inlines.h
+++ b/src/vnet/ip/ip6_inlines.h
@@ -49,31 +49,40 @@ always_inline u32
ip6_compute_flow_hash (const ip6_header_t * ip,
flow_hash_config_t flow_hash_config)
{
- tcp_header_t *tcp;
- udp_header_t *udp = (void *) (ip + 1);
- gtpv1u_header_t *gtpu = (void *) (udp + 1);
+ const tcp_header_t *tcp;
+ const udp_header_t *udp = (void *) (ip + 1);
+ const gtpv1u_header_t *gtpu = (void *) (udp + 1);
u64 a, b, c;
u64 t1, t2;
u32 t3;
uword is_tcp_udp = 0;
- uword is_udp = ip->protocol == IP_PROTOCOL_UDP;
u8 protocol = ip->protocol;
+ uword is_udp = protocol == IP_PROTOCOL_UDP;
- if (PREDICT_TRUE ((ip->protocol == IP_PROTOCOL_TCP) || is_udp))
+ if (PREDICT_TRUE ((protocol == IP_PROTOCOL_TCP) || is_udp))
{
is_tcp_udp = 1;
tcp = (void *) (ip + 1);
}
- else if (ip->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)
+ else
{
- ip6_hop_by_hop_header_t *hbh = (ip6_hop_by_hop_header_t *) (ip + 1);
- if ((hbh->protocol == IP_PROTOCOL_TCP) ||
- (hbh->protocol == IP_PROTOCOL_UDP))
+ const void *cur = ip + 1;
+ if (protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)
+ {
+ const ip6_hop_by_hop_header_t *hbh = cur;
+ protocol = hbh->protocol;
+ cur += (hbh->length + 1) * 8;
+ }
+ if (protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
+ {
+ const ip6_fragment_ext_header_t *frag = cur;
+ protocol = frag->protocol;
+ }
+ else if (protocol == IP_PROTOCOL_TCP || protocol == IP_PROTOCOL_UDP)
{
is_tcp_udp = 1;
- tcp = (tcp_header_t *) ((u8 *) hbh + ((hbh->length + 1) << 3));
+ tcp = cur;
}
- protocol = hbh->protocol;
}
t1 = (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1]);
diff --git a/src/vnet/ip/ip6_packet.h b/src/vnet/ip/ip6_packet.h
index e71604ce7d3..c506792ddcf 100644
--- a/src/vnet/ip/ip6_packet.h
+++ b/src/vnet/ip/ip6_packet.h
@@ -441,6 +441,13 @@ typedef CLIB_PACKED (struct {
}) ip6_router_alert_option_t;
typedef CLIB_PACKED (struct {
+ u8 protocol;
+ u8 reserved;
+ u16 fragoff;
+ u32 id;
+}) ip6_fragment_ext_header_t;
+
+typedef CLIB_PACKED (struct {
u8 next_hdr;
/* Length of this header plus option data in 8 byte units. */
u8 n_data_u64s;