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authorGabriel Oginski <gabrielx.oginski@intel.com>2021-10-08 09:09:45 +0100
committerMatthew Smith <mgsmith@netgate.com>2021-11-03 16:04:00 +0000
commit4739c8833e2e8013417ef0e52610d8b310e97a93 (patch)
treedbcc0c49dbeacad72005ef58c22d0e4ab13c2250 /src/plugins/wireguard/wireguard_send.c
parent505fd37b31aa5a7d242184ebe281dbd4622ad277 (diff)
wireguard: reduce memcopy and prefetch header
Originally wireguard implementation does memory copy of the whole packet in encryption and decryption. This patch removes unnecessary packet copy in wireguard. In addition, it contains some performance improvement such as prefetching header and deleting unnecessary lock and unlock for decryption. Type: improvement Signed-off-by: Gabriel Oginski <gabrielx.oginski@intel.com> Change-Id: I1fe8e54d749e6922465341083b448c842e2b670f
Diffstat (limited to 'src/plugins/wireguard/wireguard_send.c')
-rw-r--r--src/plugins/wireguard/wireguard_send.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/plugins/wireguard/wireguard_send.c b/src/plugins/wireguard/wireguard_send.c
index a5f81774a19..53692f074da 100644
--- a/src/plugins/wireguard/wireguard_send.c
+++ b/src/plugins/wireguard/wireguard_send.c
@@ -50,7 +50,9 @@ wg_buffer_prepend_rewrite (vlib_buffer_t *b0, const wg_peer_t *peer, u8 is_ip4)
vlib_buffer_advance (b0, -sizeof (*hdr4));
hdr4 = vlib_buffer_get_current (b0);
- clib_memcpy (hdr4, peer->rewrite, vec_len (peer->rewrite));
+
+ /* copy only ip4 and udp header; wireguard header not needed */
+ clib_memcpy (hdr4, peer->rewrite, sizeof (ip4_udp_header_t));
hdr4->udp.length =
clib_host_to_net_u16 (b0->current_length - sizeof (ip4_header_t));
@@ -64,7 +66,9 @@ wg_buffer_prepend_rewrite (vlib_buffer_t *b0, const wg_peer_t *peer, u8 is_ip4)
vlib_buffer_advance (b0, -sizeof (*hdr6));
hdr6 = vlib_buffer_get_current (b0);
- clib_memcpy (hdr6, peer->rewrite, vec_len (peer->rewrite));
+
+ /* copy only ip6 and udp header; wireguard header not needed */
+ clib_memcpy (hdr6, peer->rewrite, sizeof (ip6_udp_header_t));
hdr6->udp.length =
clib_host_to_net_u16 (b0->current_length - sizeof (ip6_header_t));