diff options
| author |   Neale Ranns <nranns@cisco.com> | 2017-06-01 05:43:19 -0400 |
|---|---|---|
| committer |   Damjan Marion <dmarion.lists@gmail.com> | 2018-04-18 16:19:03 +0000 |
| commit | 889fe948df5d53c6210b4db402b8c07d3e45d680 (patch) | |
| tree | 1ae3609ebd9bae146fe53060f53430cfbab404ac /src/vnet/ip/ip4_forward.c | |
| parent | 6c354941602df78f4c3bd78aa3b21fe447e3173d (diff) | |
Mcast rewrite optimisations
hard code the address mask offsets. This are protocol specific and only used on ethernet when used at all.
Change-Id: Ib1f6f33682f53254ffbb5a241a1583e65420e0c7
Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/ip/ip4_forward.c')
| -rw-r--r-- | src/vnet/ip/ip4_forward.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c index 7c56a294436..28b6203c0fb 100644 --- a/src/vnet/ip/ip4_forward.c +++ b/src/vnet/ip/ip4_forward.c @@ -1940,6 +1940,16 @@ typedef enum IP4_REWRITE_NEXT_ICMP_ERROR, } ip4_rewrite_next_t; +/** + * This bits of an IPv4 address to mask to construct a multicast + * MAC address + */ +#if CLIB_ARCH_IS_BIG_ENDIAN +#define IP4_MCAST_ADDR_MASK 0x007fffff +#else +#define IP4_MCAST_ADDR_MASK 0xffff7f00 +#endif + always_inline uword ip4_rewrite_inline (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -2197,8 +2207,16 @@ ip4_rewrite_inline (vlib_main_t * vm, /* * copy bytes from the IP address into the MAC rewrite */ - vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); - vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1); + vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK, + adj0-> + rewrite_header.dst_mcast_offset, + &ip0->dst_address.as_u32, + (u8 *) ip0); + vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK, + adj0-> + rewrite_header.dst_mcast_offset, + &ip1->dst_address.as_u32, + (u8 *) ip1); } vlib_validate_buffer_enqueue_x2 (vm, node, next_index, @@ -2277,7 +2295,11 @@ ip4_rewrite_inline (vlib_main_t * vm, /* * copy bytes from the IP address into the MAC rewrite */ - vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); + vnet_ip_mcast_fixup_header (IP4_MCAST_ADDR_MASK, + adj0-> + rewrite_header.dst_mcast_offset, + &ip0->dst_address.as_u32, + (u8 *) ip0); } /* Update packet buffer attributes/set output interface. */ |