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Diffstat (limited to 'vnet/vnet/vxlan-gpe/vxlan_gpe.c')
-rw-r--r--vnet/vnet/vxlan-gpe/vxlan_gpe.c467
1 files changed, 467 insertions, 0 deletions
diff --git a/vnet/vnet/vxlan-gpe/vxlan_gpe.c b/vnet/vnet/vxlan-gpe/vxlan_gpe.c
new file mode 100644
index 00000000000..ef242d0bb8f
--- /dev/null
+++ b/vnet/vnet/vxlan-gpe/vxlan_gpe.c
@@ -0,0 +1,467 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+
+vxlan_gpe_main_t vxlan_gpe_main;
+
+u8 * format_vxlan_gpe_tunnel (u8 * s, va_list * args)
+{
+ vxlan_gpe_tunnel_t * t = va_arg (*args, vxlan_gpe_tunnel_t *);
+ vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+
+ s = format (s, "[%d] local: %U remote: %U ",
+ t - gm->tunnels,
+ format_ip4_address, &t->local,
+ format_ip4_address, &t->remote);
+
+ switch (t->protocol)
+ {
+ case VXLAN_GPE_PROTOCOL_IP4:
+ s = format (s, "next-protocol ip4");
+ case VXLAN_GPE_PROTOCOL_IP6:
+ s = format (s, "next-protocol ip6");
+ case VXLAN_GPE_PROTOCOL_ETHERNET:
+ s = format (s, "next-protocol ethernet");
+ case VXLAN_GPE_PROTOCOL_NSH:
+ s = format (s, "next-protocol nsh");
+ default:
+ s = format (s, "next-protocol unknown %d", t->protocol);
+ }
+
+ s = format (s, " fibs: (encap %d, decap %d)",
+ t->encap_fib_index,
+ t->decap_fib_index);
+
+ s = format (s, " vxlan VNI %d ", t->vni);
+
+ return s;
+}
+
+static u8 * format_vxlan_gpe_name (u8 * s, va_list * args)
+{
+ vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+ u32 i = va_arg (*args, u32);
+ u32 show_dev_instance = ~0;
+
+ if (i < vec_len (gm->dev_inst_by_real))
+ show_dev_instance = gm->dev_inst_by_real[i];
+
+ if (show_dev_instance != ~0)
+ i = show_dev_instance;
+
+ return format (s, "vxlan_gpe_tunnel%d", i);
+}
+
+static int vxlan_gpe_name_renumber (vnet_hw_interface_t * hi,
+ u32 new_dev_instance)
+{
+ vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+
+ vec_validate_init_empty (gm->dev_inst_by_real, hi->dev_instance, ~0);
+
+ gm->dev_inst_by_real [hi->dev_instance] = new_dev_instance;
+
+ return 0;
+}
+
+static uword dummy_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ clib_warning ("you shouldn't be here, leaking buffers...");
+ return frame->n_vectors;
+}
+
+static uword dummy_set_rewrite (vnet_main_t * vnm,
+ u32 sw_if_index,
+ u32 l3_type,
+ void * dst_address,
+ void * rewrite,
+ uword max_rewrite_bytes)
+{
+ return 0;
+}
+
+VNET_DEVICE_CLASS (vxlan_gpe_device_class,static) = {
+ .name = "VXLAN_GPE",
+ .format_device_name = format_vxlan_gpe_name,
+ .format_tx_trace = format_vxlan_gpe_encap_trace,
+ .tx_function = dummy_interface_tx,
+ .name_renumber = vxlan_gpe_name_renumber,
+};
+
+static u8 * format_vxlan_gpe_header_with_length (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ s = format (s, "unimplemented dev %u", dev_instance);
+ return s;
+}
+
+VNET_HW_INTERFACE_CLASS (vxlan_gpe_hw_class) = {
+ .name = "VXLAN_GPE",
+ .format_header = format_vxlan_gpe_header_with_length,
+ .set_rewrite = dummy_set_rewrite,
+};
+
+
+#define foreach_gpe_copy_field \
+_(local.as_u32) \
+_(remote.as_u32) \
+_(vni) \
+_(protocol) \
+_(encap_fib_index) \
+_(decap_fib_index)
+
+#define foreach_copy_field \
+_(src.as_u32) \
+_(dst.as_u32) \
+_(vni) \
+_(encap_fib_index) \
+_(decap_fib_index) \
+_(decap_next_index)
+
+
+
+static int vxlan_gpe_rewrite (vxlan_gpe_tunnel_t * t)
+{
+ u8 *rw = 0;
+ ip4_header_t * ip0;
+ ip4_vxlan_gpe_header_t * h0;
+ int len;
+
+ len = sizeof (*h0);
+
+ vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+ h0 = (ip4_vxlan_gpe_header_t *) rw;
+
+ /* Fixed portion of the (outer) ip4 header */
+ ip0 = &h0->ip4;
+ ip0->ip_version_and_header_length = 0x45;
+ ip0->ttl = 254;
+ ip0->protocol = IP_PROTOCOL_UDP;
+
+ /* we fix up the ip4 header length and checksum after-the-fact */
+ ip0->src_address.as_u32 = t->local.as_u32;
+ ip0->dst_address.as_u32 = t->remote.as_u32;
+ ip0->checksum = ip4_header_checksum (ip0);
+
+ /* UDP header, randomize src port on something, maybe? */
+ h0->udp.src_port = clib_host_to_net_u16 (4790);
+ h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_vxlan_gpe);
+
+ /* VXLAN header. Are we having fun yet? */
+ h0->vxlan.flags = VXLAN_GPE_FLAGS_I | VXLAN_GPE_FLAGS_P;
+ h0->vxlan.ver_res = VXLAN_GPE_VERSION;
+ h0->vxlan.protocol = VXLAN_GPE_PROTOCOL_IP4;
+ h0->vxlan.vni_res = clib_host_to_net_u32 (t->vni<<8);
+
+ t->rewrite = rw;
+ return (0);
+}
+
+int vnet_vxlan_gpe_add_del_tunnel
+(vnet_vxlan_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
+{
+ vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+ vxlan_gpe_tunnel_t *t = 0;
+ vnet_main_t * vnm = gm->vnet_main;
+ vnet_hw_interface_t * hi;
+ uword * p;
+ u32 hw_if_index = ~0;
+ u32 sw_if_index = ~0;
+ int rv;
+ vxlan_gpe_tunnel_key_t key, *key_copy;
+ hash_pair_t *hp;
+
+ key.local = a->local.as_u32;
+ key.remote = a->remote.as_u32;
+ key.vni = clib_host_to_net_u32 (a->vni << 8);
+ key.pad = 0;
+
+ p = hash_get_mem (gm->vxlan_gpe_tunnel_by_key, &key);
+
+ if (a->is_add)
+ {
+ /* adding a tunnel: tunnel must not already exist */
+ if (p)
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ if (a->decap_next_index >= VXLAN_GPE_INPUT_N_NEXT)
+ return VNET_API_ERROR_INVALID_DECAP_NEXT;
+
+ pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ memset (t, 0, sizeof (*t));
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_gpe_copy_field;
+#undef _
+
+ rv = vxlan_gpe_rewrite (t);
+
+ if (rv)
+ {
+ pool_put (gm->tunnels, t);
+ return rv;
+ }
+
+ key_copy = clib_mem_alloc (sizeof (*key_copy));
+ clib_memcpy (key_copy, &key, sizeof (*key_copy));
+
+ hash_set_mem (gm->vxlan_gpe_tunnel_by_key, key_copy,
+ t - gm->tunnels);
+
+ if (vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) > 0)
+ {
+ hw_if_index = gm->free_vxlan_gpe_tunnel_hw_if_indices
+ [vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices)-1];
+ _vec_len (gm->free_vxlan_gpe_tunnel_hw_if_indices) -= 1;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->dev_instance = t - gm->tunnels;
+ hi->hw_instance = hi->dev_instance;
+ }
+ else
+ {
+ hw_if_index = vnet_register_interface
+ (vnm, vxlan_gpe_device_class.index, t - gm->tunnels,
+ vxlan_gpe_hw_class.index, t - gm->tunnels);
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->output_node_index = vxlan_gpe_encap_node.index;
+ }
+
+ t->hw_if_index = hw_if_index;
+ t->sw_if_index = sw_if_index = hi->sw_if_index;
+
+ vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
+ VNET_SW_INTERFACE_FLAG_ADMIN_UP);
+ }
+ else
+ {
+ /* deleting a tunnel: tunnel must exist */
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ t = pool_elt_at_index (gm->tunnels, p[0]);
+
+ vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
+ vec_add1 (gm->free_vxlan_gpe_tunnel_hw_if_indices, t->hw_if_index);
+
+ hp = hash_get_pair (gm->vxlan_gpe_tunnel_by_key, &key);
+ key_copy = (void *)(hp->key);
+ hash_unset_mem (gm->vxlan_gpe_tunnel_by_key, &key);
+ clib_mem_free (key_copy);
+
+ vec_free (t->rewrite);
+ pool_put (gm->tunnels, t);
+ }
+
+ if (sw_if_indexp)
+ *sw_if_indexp = sw_if_index;
+
+ return 0;
+}
+
+static u32 fib_index_from_fib_id (u32 fib_id)
+{
+ ip4_main_t * im = &ip4_main;
+ uword * p;
+
+ p = hash_get (im->fib_index_by_table_id, fib_id);
+ if (!p)
+ return ~0;
+
+ return p[0];
+}
+
+static uword unformat_gpe_decap_next (unformat_input_t * input, va_list * args)
+{
+ u32 * result = va_arg (*args, u32 *);
+ u32 tmp;
+
+ if (unformat (input, "drop"))
+ *result = VXLAN_GPE_INPUT_NEXT_DROP;
+ else if (unformat (input, "ip4"))
+ *result = VXLAN_GPE_INPUT_NEXT_IP4_INPUT;
+ else if (unformat (input, "ip6"))
+ *result = VXLAN_GPE_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, "ethernet"))
+ *result = VXLAN_GPE_INPUT_NEXT_ETHERNET_INPUT;
+ else if (unformat (input, "nsh"))
+ *result = VXLAN_GPE_INPUT_NEXT_NSH_INPUT;
+ else if (unformat (input, "%d", &tmp))
+ *result = tmp;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+vxlan_gpe_add_del_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, * line_input = &_line_input;
+ u8 is_add = 1;
+ ip4_address_t local, remote;
+ u8 local_set = 0;
+ u8 remote_set = 0;
+ u32 encap_fib_index = 0;
+ u32 decap_fib_index = 0;
+ u8 protocol = VXLAN_GPE_PROTOCOL_IP4;
+ u32 decap_next_index = VXLAN_GPE_INPUT_NEXT_IP4_INPUT;
+ u32 vni;
+ u8 vni_set = 0;
+ int rv;
+ u32 tmp;
+ vnet_vxlan_gpe_add_del_tunnel_args_t _a, * a = &_a;
+
+ /* Get a line of input. */
+ if (! unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (line_input, "del"))
+ is_add = 0;
+ else if (unformat (line_input, "local %U",
+ unformat_ip4_address, &local))
+ local_set = 1;
+ else if (unformat (line_input, "remote %U",
+ unformat_ip4_address, &remote))
+ remote_set = 1;
+ else if (unformat (line_input, "encap-vrf-id %d", &tmp))
+ {
+ encap_fib_index = fib_index_from_fib_id (tmp);
+ if (encap_fib_index == ~0)
+ return clib_error_return (0, "nonexistent encap fib id %d", tmp);
+ }
+ else if (unformat (line_input, "decap-vrf-id %d", &tmp))
+ {
+ decap_fib_index = fib_index_from_fib_id (tmp);
+ if (decap_fib_index == ~0)
+ return clib_error_return (0, "nonexistent decap fib id %d", tmp);
+ }
+ else if (unformat (line_input, "decap-next %U", unformat_gpe_decap_next,
+ &decap_next_index))
+ ;
+ else if (unformat (line_input, "vni %d", &vni))
+ vni_set = 1;
+ else if (unformat(line_input, "next-ip4"))
+ protocol = VXLAN_GPE_PROTOCOL_IP4;
+ else if (unformat(line_input, "next-ip6"))
+ protocol = VXLAN_GPE_PROTOCOL_IP6;
+ else if (unformat(line_input, "next-ethernet"))
+ protocol = VXLAN_GPE_PROTOCOL_ETHERNET;
+ else if (unformat(line_input, "next-nsh"))
+ protocol = VXLAN_GPE_PROTOCOL_NSH;
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+ if (local_set == 0)
+ return clib_error_return (0, "tunnel local address not specified");
+
+ if (remote_set == 0)
+ return clib_error_return (0, "tunnel remote address not specified");
+
+ if (vni_set == 0)
+ return clib_error_return (0, "vni not specified");
+
+ memset (a, 0, sizeof (*a));
+
+ a->is_add = is_add;
+
+#define _(x) a->x = x;
+ foreach_gpe_copy_field;
+#undef _
+
+ rv = vnet_vxlan_gpe_add_del_tunnel (a, 0 /* hw_if_indexp */);
+
+ switch(rv)
+ {
+ case 0:
+ break;
+ case VNET_API_ERROR_INVALID_DECAP_NEXT:
+ return clib_error_return (0, "invalid decap-next...");
+
+ case VNET_API_ERROR_TUNNEL_EXIST:
+ return clib_error_return (0, "tunnel already exists...");
+
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "tunnel does not exist...");
+
+ default:
+ return clib_error_return
+ (0, "vnet_vxlan_gpe_add_del_tunnel returned %d", rv);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (create_vxlan_gpe_tunnel_command, static) = {
+ .path = "create vxlan-gpe tunnel",
+ .short_help =
+ "create vxlan-gpe tunnel local <ip4-addr> remote <ip4-addr>"
+ " vni <nn> [next-ip4][next-ip6][next-ethernet][next-nsh]"
+ " [encap-vrf-id <nn>] [decap-vrf-id <nn>]"
+ " [del]\n",
+ .function = vxlan_gpe_add_del_tunnel_command_fn,
+};
+
+static clib_error_t *
+show_vxlan_gpe_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vxlan_gpe_main_t * gm = &vxlan_gpe_main;
+ vxlan_gpe_tunnel_t * t;
+
+ if (pool_elts (gm->tunnels) == 0)
+ vlib_cli_output (vm, "No vxlan-gpe tunnels configured.");
+
+ pool_foreach (t, gm->tunnels,
+ ({
+ vlib_cli_output (vm, "%U", format_vxlan_gpe_tunnel, t);
+ }));
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_vxlan_gpe_tunnel_command, static) = {
+ .path = "show vxlan-gpe",
+ .function = show_vxlan_gpe_tunnel_command_fn,
+};
+
+clib_error_t *vxlan_gpe_init (vlib_main_t *vm)
+{
+ vxlan_gpe_main_t *gm = &vxlan_gpe_main;
+
+ gm->vnet_main = vnet_get_main();
+ gm->vlib_main = vm;
+
+ gm->vxlan_gpe_tunnel_by_key
+ = hash_create_mem (0, sizeof(vxlan_gpe_tunnel_key_t), sizeof (uword));
+
+ udp_register_dst_port (vm, UDP_DST_PORT_vxlan_gpe,
+ vxlan_gpe_input_node.index, 1 /* is_ip4 */);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION(vxlan_gpe_init);
+