aboutsummaryrefslogtreecommitdiffstats
path: root/vnet/vnet/lisp-gpe/lisp_gpe.c
diff options
context:
space:
mode:
Diffstat (limited to 'vnet/vnet/lisp-gpe/lisp_gpe.c')
-rw-r--r--vnet/vnet/lisp-gpe/lisp_gpe.c498
1 files changed, 498 insertions, 0 deletions
diff --git a/vnet/vnet/lisp-gpe/lisp_gpe.c b/vnet/vnet/lisp-gpe/lisp_gpe.c
new file mode 100644
index 00000000000..eb4ca919b20
--- /dev/null
+++ b/vnet/vnet/lisp-gpe/lisp_gpe.c
@@ -0,0 +1,498 @@
+/*
+ * 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/lisp-gpe/lisp_gpe.h>
+
+lisp_gpe_main_t lisp_gpe_main;
+
+static u8 * format_decap_next (u8 * s, va_list * args)
+{
+ u32 next_index = va_arg (*args, u32);
+
+ switch (next_index)
+ {
+ case LISP_GPE_INPUT_NEXT_DROP:
+ return format (s, "drop");
+ case LISP_GPE_INPUT_NEXT_IP4_INPUT:
+ return format (s, "ip4");
+ case LISP_GPE_INPUT_NEXT_IP6_INPUT:
+ return format (s, "ip6");
+ case LISP_GPE_INPUT_NEXT_LISP_GPE_ENCAP:
+ return format (s, "nsh-lisp-gpe");
+ default:
+ return format (s, "unknown %d", next_index);
+ }
+ return s;
+}
+
+u8 * format_lisp_gpe_tunnel (u8 * s, va_list * args)
+{
+ lisp_gpe_tunnel_t * t = va_arg (*args, lisp_gpe_tunnel_t *);
+ lisp_gpe_main_t * ngm = &lisp_gpe_main;
+
+ s = format (s,
+ "[%d] %U (src) %U (dst) fibs: encap %d, decap %d",
+ t - ngm->tunnels,
+ format_ip4_address, &t->src,
+ format_ip4_address, &t->dst,
+ t->encap_fib_index,
+ t->decap_fib_index);
+
+ s = format (s, " decap next %U\n", format_decap_next, t->decap_next_index);
+ s = format (s, "lisp ver %d ", (t->ver_res>>6));
+
+#define _(n,v) if (t->flags & v) s = format (s, "%s-bit ", #n);
+ foreach_lisp_gpe_flag_bit;
+#undef _
+
+ s = format (s, "next_protocol %d ver_res %x res %x\n",
+ t->next_protocol, t->ver_res, t->res);
+
+ s = format (s, "iid %d (0x%x)\n", t->iid, t->iid);
+ return s;
+}
+
+static u8 * format_lisp_gpe_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ return format (s, "lisp_gpe_tunnel%d", dev_instance);
+}
+
+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;
+}
+
+VNET_DEVICE_CLASS (lisp_gpe_device_class,static) = {
+ .name = "LISP_GPE",
+ .format_device_name = format_lisp_gpe_name,
+ .format_tx_trace = format_lisp_gpe_encap_trace,
+ .tx_function = dummy_interface_tx,
+};
+
+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;
+}
+
+u8 * format_lisp_gpe_header_with_length (u8 * s, va_list * args)
+{
+ lisp_gpe_header_t * h = va_arg (*args, lisp_gpe_header_t *);
+ u32 max_header_bytes = va_arg (*args, u32);
+ u32 header_bytes;
+
+ header_bytes = sizeof (h[0]);
+ if (max_header_bytes != 0 && header_bytes > max_header_bytes)
+ return format (s, "gre-nsh header truncated");
+
+ s = format (s, "flags: ");
+#define _(n,v) if (h->flags & v) s = format (s, "%s ", #n);
+ foreach_lisp_gpe_flag_bit;
+#undef _
+
+ s = format (s, "\n ver_res %d res %d next_protocol %d iid %d(%x)",
+ h->ver_res, h->res, h->next_protocol,
+ clib_net_to_host_u32 (h->iid),
+ clib_net_to_host_u32 (h->iid));
+ return s;
+}
+
+VNET_HW_INTERFACE_CLASS (lisp_gpe_hw_class) = {
+ .name = "LISP_GPE",
+ .format_header = format_lisp_gpe_header_with_length,
+ .set_rewrite = dummy_set_rewrite,
+};
+
+#define foreach_copy_field \
+_(src.as_u32) \
+_(dst.as_u32) \
+_(encap_fib_index) \
+_(decap_fib_index) \
+_(decap_next_index) \
+_(flags) \
+_(next_protocol) \
+_(ver_res) \
+_(res) \
+_(iid)
+
+static int lisp_gpe_rewrite (lisp_gpe_tunnel_t * t)
+{
+ u8 *rw = 0;
+ ip4_header_t * ip0;
+ lisp_gpe_header_t * lisp0;
+ ip4_udp_lisp_gpe_header_t * h0;
+ int len;
+
+ len = sizeof (*h0);
+
+ vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+ h0 = (ip4_udp_lisp_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->src.as_u32;
+ ip0->dst_address.as_u32 = t->dst.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 (4341);
+ h0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_lisp_gpe);
+
+ /* LISP-gpe header */
+ lisp0 = &h0->lisp;
+
+ lisp0->flags = t->flags;
+ lisp0->ver_res = t->ver_res;
+ lisp0->res = t->res;
+ lisp0->next_protocol = t->next_protocol;
+ lisp0->iid = clib_host_to_net_u32 (t->iid);
+
+ t->rewrite = rw;
+ return (0);
+}
+
+int vnet_lisp_gpe_add_del_tunnel
+(vnet_lisp_gpe_add_del_tunnel_args_t *a, u32 * sw_if_indexp)
+{
+ lisp_gpe_main_t * ngm = &lisp_gpe_main;
+ lisp_gpe_tunnel_t *t = 0;
+ vnet_main_t * vnm = ngm->vnet_main;
+ vnet_hw_interface_t * hi;
+ uword * p;
+ u32 hw_if_index = ~0;
+ u32 sw_if_index = ~0;
+ int rv;
+ lisp_gpe_tunnel_key_t key, *key_copy;
+ hash_pair_t *hp;
+
+ key.src = a->src.as_u32;
+ key.iid = clib_host_to_net_u32(a->iid);
+
+ p = hash_get_mem (ngm->lisp_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 >= LISP_GPE_INPUT_N_NEXT)
+ return VNET_API_ERROR_INVALID_DECAP_NEXT;
+
+ pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ memset (t, 0, sizeof (*t));
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_copy_field;
+#undef _
+
+ rv = lisp_gpe_rewrite (t);
+
+ if (rv)
+ {
+ pool_put (ngm->tunnels, t);
+ return rv;
+ }
+
+ key_copy = clib_mem_alloc (sizeof (*key_copy));
+ memcpy (key_copy, &key, sizeof (*key_copy));
+
+ hash_set_mem (ngm->lisp_gpe_tunnel_by_key, key_copy,
+ t - ngm->tunnels);
+
+ if (vec_len (ngm->free_lisp_gpe_tunnel_hw_if_indices) > 0)
+ {
+ hw_if_index = ngm->free_lisp_gpe_tunnel_hw_if_indices
+ [vec_len (ngm->free_lisp_gpe_tunnel_hw_if_indices)-1];
+ _vec_len (ngm->free_lisp_gpe_tunnel_hw_if_indices) -= 1;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->dev_instance = t - ngm->tunnels;
+ hi->hw_instance = hi->dev_instance;
+ }
+ else
+ {
+ hw_if_index = vnet_register_interface
+ (vnm, lisp_gpe_device_class.index, t - ngm->tunnels,
+ lisp_gpe_hw_class.index, t - ngm->tunnels);
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->output_node_index = lisp_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 (ngm->tunnels, p[0]);
+
+ vnet_sw_interface_set_flags (vnm, t->sw_if_index, 0 /* down */);
+ vec_add1 (ngm->free_lisp_gpe_tunnel_hw_if_indices, t->hw_if_index);
+
+ hp = hash_get_pair (ngm->lisp_gpe_tunnel_by_key, &key);
+ key_copy = (void *)(hp->key);
+ hash_unset_mem (ngm->lisp_gpe_tunnel_by_key, &key);
+ clib_mem_free (key_copy);
+
+ vec_free (t->rewrite);
+ pool_put (ngm->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_decap_next (unformat_input_t * input, va_list * args)
+{
+ u32 * result = va_arg (*args, u32 *);
+ u32 tmp;
+
+ if (unformat (input, "drop"))
+ *result = LISP_GPE_INPUT_NEXT_DROP;
+ else if (unformat (input, "ip4"))
+ *result = LISP_GPE_INPUT_NEXT_IP4_INPUT;
+ else if (unformat (input, "ip6"))
+ *result = LISP_GPE_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, "ethernet"))
+ *result = LISP_GPE_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, "lisp-gpe"))
+ *result = LISP_GPE_INPUT_NEXT_LISP_GPE_ENCAP;
+ else if (unformat (input, "%d", &tmp))
+ *result = tmp;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+lisp_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;
+ ip4_address_t src, dst;
+ u8 is_add = 1;
+ u8 src_set = 0;
+ u8 dst_set = 0;
+ u32 encap_fib_index = 0;
+ u32 decap_fib_index = 0;
+ u8 next_protocol = LISP_GPE_NEXT_PROTOCOL_IP4;
+ u32 decap_next_index = LISP_GPE_INPUT_NEXT_IP4_INPUT;
+ u8 flags = LISP_GPE_FLAGS_P;
+ u8 ver_res = 0;
+ u8 res = 0;
+ u32 iid = 0;
+ u8 iid_set = 0;
+ u32 tmp;
+ int rv;
+ vnet_lisp_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, "src %U",
+ unformat_ip4_address, &src))
+ src_set = 1;
+ else if (unformat (line_input, "dst %U",
+ unformat_ip4_address, &dst))
+ dst_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_decap_next,
+ &decap_next_index))
+ ;
+ else if (unformat(line_input, "next-ip4"))
+ next_protocol = 1;
+ else if (unformat(line_input, "next-ip6"))
+ next_protocol = 2;
+ else if (unformat(line_input, "next-ethernet"))
+ next_protocol = 3;
+ else if (unformat(line_input, "next-nsh"))
+ next_protocol = 4;
+ /* Allow the user to specify anything they want in the LISP hdr */
+ else if (unformat (line_input, "ver_res %x", &tmp))
+ ver_res = tmp;
+ else if (unformat (line_input, "res %x", &tmp))
+ res = tmp;
+ else if (unformat (line_input, "flags %x", &tmp))
+ flags = tmp;
+ else if (unformat (line_input, "n-bit"))
+ flags |= LISP_GPE_FLAGS_N;
+ else if (unformat (line_input, "l-bit"))
+ flags |= LISP_GPE_FLAGS_L;
+ else if (unformat (line_input, "e-bit"))
+ flags |= LISP_GPE_FLAGS_E;
+ else if (unformat (line_input, "v-bit"))
+ flags |= LISP_GPE_FLAGS_V;
+ else if (unformat (line_input, "i-bit"))
+ flags |= LISP_GPE_FLAGS_V;
+ else if (unformat (line_input, "not-p-bit"))
+ flags &= ~LISP_GPE_FLAGS_P;
+ else if (unformat (line_input, "p-bit"))
+ flags |= LISP_GPE_FLAGS_P;
+ else if (unformat (line_input, "o-bit"))
+ flags |= LISP_GPE_FLAGS_O;
+ else if (unformat (line_input, "iidx %x", &iid))
+ iid_set = 1;
+ else if (unformat (line_input, "iid %d", &iid))
+ iid_set = 1;
+ else
+ return clib_error_return (0, "parse error: '%U'",
+ format_unformat_error, line_input);
+ }
+
+ unformat_free (line_input);
+
+ if (src_set == 0)
+ return clib_error_return (0, "tunnel src address not specified");
+
+ if (dst_set == 0)
+ return clib_error_return (0, "tunnel dst address not specified");
+
+ if (iid_set == 0)
+ return clib_error_return (0, "iid not specified");
+
+ memset (a, 0, sizeof (*a));
+
+ a->is_add = is_add;
+
+#define _(x) a->x = x;
+ foreach_copy_field;
+#undef _
+
+ rv = vnet_lisp_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_lisp_gpe_add_del_tunnel returned %d", rv);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (create_lisp_gpe_tunnel_command, static) = {
+ .path = "lisp gpe tunnel",
+ .short_help =
+ "lisp gpe tunnel src <ip4-addr> dst <ip4-addr> iidx <0xnn> | iid <nn>\n"
+ " [encap-fib-id <nn>] [decap-fib-id <nn>]\n"
+ " [n-bit][l-bit][e-bit][v-bit][i-bit][p-bit][not-p-bit][o-bit]\n"
+ " [next-ip4][next-ip6][next-ethernet][next-nsh]\n"
+ " [decap-next [ip4|ip6|ethernet|nsh-encap|<nn>]][del]\n",
+ .function = lisp_gpe_add_del_tunnel_command_fn,
+};
+
+static clib_error_t *
+show_lisp_gpe_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ lisp_gpe_main_t * ngm = &lisp_gpe_main;
+ lisp_gpe_tunnel_t * t;
+
+ if (pool_elts (ngm->tunnels) == 0)
+ vlib_cli_output (vm, "No lisp-gpe tunnels configured...");
+
+ pool_foreach (t, ngm->tunnels,
+ ({
+ vlib_cli_output (vm, "%U", format_lisp_gpe_tunnel, t);
+ }));
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_lisp_gpe_tunnel_command, static) = {
+ .path = "show lisp gpe tunnel",
+ .function = show_lisp_gpe_tunnel_command_fn,
+};
+
+clib_error_t *lisp_gpe_init (vlib_main_t *vm)
+{
+ lisp_gpe_main_t *ngm = &lisp_gpe_main;
+
+ ngm->vnet_main = vnet_get_main();
+ ngm->vlib_main = vm;
+
+ ngm->lisp_gpe_tunnel_by_key
+ = hash_create_mem (0, sizeof(lisp_gpe_tunnel_key_t), sizeof (uword));
+
+ udp_register_dst_port (vm, UDP_DST_PORT_lisp_gpe,
+ lisp_gpe_input_node.index, 1 /* is_ip4 */);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION(lisp_gpe_init);
+