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authorArtem Glazychev <artem.glazychev@xored.com>2021-06-03 20:11:54 +0700
committerEd Warnicke <hagbard@gmail.com>2021-10-06 17:57:46 +0000
commit7dd3b5b5e37a4019ae335296ba9c4bd1e465fd17 (patch)
tree0cd0a76ebce52b2907514e4e4394af32094d2ab7 /src/plugins/wireguard/wireguard_peer.c
parent0c4931cb351929a1ccdb6b29431def3705f101d7 (diff)
wireguard: add ipv6 support
Type: improvement Signed-off-by: Artem Glazychev <artem.glazychev@xored.com> Change-Id: If1a7e82ce163c4c4acaa5acf45ad2b88371396f6
Diffstat (limited to 'src/plugins/wireguard/wireguard_peer.c')
-rw-r--r--src/plugins/wireguard/wireguard_peer.c128
1 files changed, 106 insertions, 22 deletions
diff --git a/src/plugins/wireguard/wireguard_peer.c b/src/plugins/wireguard/wireguard_peer.c
index d4a85a20cf6..fb540141e08 100644
--- a/src/plugins/wireguard/wireguard_peer.c
+++ b/src/plugins/wireguard/wireguard_peer.c
@@ -22,6 +22,7 @@
#include <wireguard/wireguard_key.h>
#include <wireguard/wireguard_send.h>
#include <wireguard/wireguard.h>
+#include <vnet/tunnel/tunnel_dp.h>
wg_peer_t *wg_peer_pool;
@@ -91,25 +92,44 @@ wg_peer_init (vlib_main_t * vm, wg_peer_t * peer)
}
static u8 *
-wg_peer_build_rewrite (const wg_peer_t * peer)
+wg_peer_build_rewrite (const wg_peer_t *peer, u8 is_ip4)
{
- // v4 only for now
- ip4_udp_header_t *hdr;
u8 *rewrite = NULL;
+ if (is_ip4)
+ {
+ ip4_udp_header_t *hdr;
+
+ vec_validate (rewrite, sizeof (*hdr) - 1);
+ hdr = (ip4_udp_header_t *) rewrite;
+
+ hdr->ip4.ip_version_and_header_length = 0x45;
+ hdr->ip4.ttl = 64;
+ hdr->ip4.src_address = peer->src.addr.ip4;
+ hdr->ip4.dst_address = peer->dst.addr.ip4;
+ hdr->ip4.protocol = IP_PROTOCOL_UDP;
+ hdr->ip4.checksum = ip4_header_checksum (&hdr->ip4);
+
+ hdr->udp.src_port = clib_host_to_net_u16 (peer->src.port);
+ hdr->udp.dst_port = clib_host_to_net_u16 (peer->dst.port);
+ hdr->udp.checksum = 0;
+ }
+ else
+ {
+ ip6_udp_header_t *hdr;
- vec_validate (rewrite, sizeof (*hdr) - 1);
- hdr = (ip4_udp_header_t *) rewrite;
+ vec_validate (rewrite, sizeof (*hdr) - 1);
+ hdr = (ip6_udp_header_t *) rewrite;
- hdr->ip4.ip_version_and_header_length = 0x45;
- hdr->ip4.ttl = 64;
- hdr->ip4.src_address = peer->src.addr.ip4;
- hdr->ip4.dst_address = peer->dst.addr.ip4;
- hdr->ip4.protocol = IP_PROTOCOL_UDP;
- hdr->ip4.checksum = ip4_header_checksum (&hdr->ip4);
+ hdr->ip6.ip_version_traffic_class_and_flow_label = 0x60;
+ ip6_address_copy (&hdr->ip6.src_address, &peer->src.addr.ip6);
+ ip6_address_copy (&hdr->ip6.dst_address, &peer->dst.addr.ip6);
+ hdr->ip6.protocol = IP_PROTOCOL_UDP;
+ hdr->ip6.hop_limit = 64;
- hdr->udp.src_port = clib_host_to_net_u16 (peer->src.port);
- hdr->udp.dst_port = clib_host_to_net_u16 (peer->dst.port);
- hdr->udp.checksum = 0;
+ hdr->udp.src_port = clib_host_to_net_u16 (peer->src.port);
+ hdr->udp.dst_port = clib_host_to_net_u16 (peer->dst.port);
+ hdr->udp.checksum = 0;
+ }
return (rewrite);
}
@@ -120,12 +140,15 @@ wg_peer_adj_stack (wg_peer_t *peer, adj_index_t ai)
ip_adjacency_t *adj;
u32 sw_if_index;
wg_if_t *wgi;
+ fib_protocol_t fib_proto;
if (!adj_is_valid (ai))
return;
adj = adj_get (ai);
sw_if_index = adj->rewrite_header.sw_if_index;
+ u8 is_ip4 = ip46_address_is_ip4 (&peer->src.addr);
+ fib_proto = is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
wgi = wg_if_get (wg_if_find_by_sw_if_index (sw_if_index));
@@ -140,19 +163,76 @@ wg_peer_adj_stack (wg_peer_t *peer, adj_index_t ai)
{
/* *INDENT-OFF* */
fib_prefix_t dst = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr = peer->dst.addr,
+ .fp_len = is_ip4 ? 32 : 128,
+ .fp_proto = fib_proto,
+ .fp_addr = peer->dst.addr,
};
/* *INDENT-ON* */
u32 fib_index;
- fib_index = fib_table_find (FIB_PROTOCOL_IP4, peer->table_id);
+ fib_index = fib_table_find (fib_proto, peer->table_id);
adj_midchain_delegate_stack (ai, fib_index, &dst);
}
}
+static void
+wg_peer_66_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
+ const void *data)
+{
+ u8 iph_offset = 0;
+ ip6_header_t *ip6_out;
+ ip6_header_t *ip6_in;
+
+ /* Must set locally originated otherwise we're not allowed to
+ fragment the packet later */
+ b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+
+ ip6_out = vlib_buffer_get_current (b);
+ iph_offset = vnet_buffer (b)->ip.save_rewrite_length;
+ ip6_in = vlib_buffer_get_current (b) + iph_offset;
+
+ ip6_out->ip_version_traffic_class_and_flow_label =
+ ip6_in->ip_version_traffic_class_and_flow_label;
+}
+
+static void
+wg_peer_46_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
+ const void *data)
+{
+ u8 iph_offset = 0;
+ ip6_header_t *ip6_out;
+ ip4_header_t *ip4_in;
+
+ /* Must set locally originated otherwise we're not allowed to
+ fragment the packet later */
+ b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+
+ ip6_out = vlib_buffer_get_current (b);
+ iph_offset = vnet_buffer (b)->ip.save_rewrite_length;
+ ip4_in = vlib_buffer_get_current (b) + iph_offset;
+
+ u32 vtcfl = 0x6 << 28;
+ vtcfl |= ip4_in->tos << 20;
+ vtcfl |= vnet_buffer (b)->ip.flow_hash & 0x000fffff;
+
+ ip6_out->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (vtcfl);
+}
+
+static adj_midchain_fixup_t
+wg_peer_get_fixup (wg_peer_t *peer, vnet_link_t lt)
+{
+ if (!ip46_address_is_ip4 (&peer->dst.addr))
+ {
+ if (lt == VNET_LINK_IP4)
+ return (wg_peer_46_fixup);
+ if (lt == VNET_LINK_IP6)
+ return (wg_peer_66_fixup);
+ }
+ return (NULL);
+}
+
walk_rc_t
wg_peer_if_admin_state_change (index_t peeri, void *data)
{
@@ -170,6 +250,7 @@ walk_rc_t
wg_peer_if_adj_change (index_t peeri, void *data)
{
adj_index_t *adj_index = data;
+ adj_midchain_fixup_t fixup;
ip_adjacency_t *adj;
wg_peer_t *peer;
fib_prefix_t *allowed_ip;
@@ -179,15 +260,16 @@ wg_peer_if_adj_change (index_t peeri, void *data)
peer = wg_peer_get (peeri);
vec_foreach (allowed_ip, peer->allowed_ips)
{
- if (fib_prefix_is_cover_addr_4 (allowed_ip,
- &adj->sub_type.nbr.next_hop.ip4))
+ if (fib_prefix_is_cover_addr_46 (allowed_ip,
+ &adj->sub_type.nbr.next_hop))
{
vec_add1 (peer->adj_indices, *adj_index);
vec_validate_init_empty (wg_peer_by_adj_index, *adj_index,
INDEX_INVALID);
wg_peer_by_adj_index[*adj_index] = peer - wg_peer_pool;
- adj_nbr_midchain_update_rewrite (*adj_index, NULL, NULL,
+ fixup = wg_peer_get_fixup (peer, adj_get_link_type (*adj_index));
+ adj_nbr_midchain_update_rewrite (*adj_index, fixup, NULL,
ADJ_FLAG_MIDCHAIN_IP_STACK,
vec_dup (peer->rewrite));
@@ -236,7 +318,9 @@ wg_peer_fill (vlib_main_t *vm, wg_peer_t *peer, u32 table_id,
ip_address_to_46 (&wgi->src_ip, &peer->src.addr);
peer->src.port = wgi->port;
- peer->rewrite = wg_peer_build_rewrite (peer);
+
+ u8 is_ip4 = ip46_address_is_ip4 (&peer->dst.addr);
+ peer->rewrite = wg_peer_build_rewrite (peer, is_ip4);
u32 ii;
vec_validate (peer->allowed_ips, vec_len (allowed_ips) - 1);