--- /dev/null
+;;; tunnel-c-skel.el - tunnel encap cli / api
+
+(require 'skeleton)
+
+(define-skeleton skel-tunnel-c
+"Insert a tunnel cli/api implementation"
+nil
+'(setq encap_stack (skeleton-read "encap_stack (e.g ip4_udp_lisp): "))
+'(setq ENCAP_STACK (upcase encap_stack))
+'(setq encap-stack (replace-regexp-in-string "_" "-" encap_stack))
+"
+#include <vnet/" encap-stack "/" encap_stack" .h>
+
+" encap_stack "_main_t " encap_stack "_main;
+
+static u8 * format_decap_next (u8 * s, va_list * args)
+{
+ u32 next_index = va_arg (*args, u32);
+
+ switch (next_index)
+ {
+ case " ENCAP_STACK "_INPUT_NEXT_DROP:
+ return format (s, \"drop\");
+ case " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT:
+ return format (s, \"ip4\");
+ case " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT:
+ return format (s, \"ip6\");
+ case " ENCAP_STACK "_INPUT_NEXT_" ENCAP_STACK "_ENCAP:
+ return format (s, \"" encap-stack "\");
+ default:
+ return format (s, \"unknown %d\", next_index);
+ }
+ return s;
+}
+
+u8 * format_" encap_stack "_tunnel (u8 * s, va_list * args)
+{
+ " encap_stack "_tunnel_t * t = va_arg (*args, " encap_stack "_tunnel_t *);
+ " encap_stack "_main_t * ngm = &" encap_stack "_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);
+ /* FIXME: add protocol details */
+ return s;
+}
+
+static u8 * format_" encap_stack "_name (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ return format (s, \"" encap_stack "_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 (" encap_stack "_device_class,static) = {
+ .name = "" ENCAP_STACK "",
+ .format_device_name = format_" encap_stack "_name,
+ .format_tx_trace = format_" encap_stack "_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_" encap_stack "_header_with_length (u8 * s, va_list * args)
+{
+ " encap_stack "_header_t * h = va_arg (*args, " encap_stack "_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, \"" encap-stack "header truncated\");
+
+ /* FIXME: pretty-print an " encap_stack " header */
+
+ return s;
+}
+
+VNET_HW_INTERFACE_CLASS (" encap_stack "_hw_class) = {
+ .name = \"" ENCAP_STACK "\",
+ .format_header = format_" encap_stack "_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) \
+_(FIXME_ADD_ALL_COPY_FIELDS )
+
+static int " encap_stack "_rewrite (" encap_stack "_tunnel_t * t)
+{
+ u8 *rw = 0;
+ ip4_header_t * ip0;
+ " encap_stack "_header_t * h0;
+ int len;
+
+ len = sizeof (*h0);
+
+ vec_validate_aligned (rw, len-1, CLIB_CACHE_LINE_BYTES);
+
+ h0 = (ip4_udp_" encap_stack "_header_t *) rw;
+
+ /* FIXME: build the actual header here... */
+
+ /* 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'll 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_" encap_stack ");
+
+ /* $$$ build a <mumble> tunnel header here */
+
+ t->rewrite = rw;
+ return (0);
+}
+
+int vnet_" encap_stack "_add_del_tunnel
+(vnet_" encap_stack "_add_del_tunnel_args_t *a, u32 * hw_if_indexp)
+{
+ " encap_stack "_main_t * ngm = &" encap_stack "_main;
+ " encap_stack "_tunnel_t *t = 0;
+ vnet_main_t * vnm = ngm->vnet_main;
+ vnet_hw_interface_t * hi;
+ uword * p;
+ u32 hw_if_index = ~0;
+ int rv;
+ " encap_stack "_tunnel_key_t key, *key_copy;
+ hash_pair_t *hp;
+
+ key.FIXME = clib_host_to_net_XXX(FIXME);
+
+ p = hash_get_mem (ngm->" encap_stack "_tunnel_by_key, &key);
+
+ if (a->is_add)
+ {
+ /* adding a tunnel: tunnel must not already exist */
+ if (p)
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+ memset (t, 0, sizeof (*t));
+
+ /* copy from arg structure */
+#define _(x) t->x = a->x;
+ foreach_copy_field;
+#undef _
+
+ rv = " encap_stack "_rewrite (t);
+
+ if (rv)
+ {
+ pool_put (ngm->tunnels, t);
+ return rv;
+ }
+
+ /* $$$$ use a simple hash if you can ... */
+ key_copy = clib_mem_alloc (sizeof (*key_copy));
+ clib_memcpy (key_copy, &key, sizeof (*key_copy));
+
+ hash_set_mem (ngm->" encap_stack "_tunnel_by_key, key_copy,
+ t - ngm->tunnels);
+
+ /*
+ * interface freelist / recycle shtik
+ * This simple implementation rapidly reuses freed tunnel interfaces.
+ * Consider whether to refcount, etc. etc.
+ */
+ if (vec_len (ngm->free_" encap_stack "_tunnel_hw_if_indices) > 0)
+ {
+ hw_if_index = ngm->free_" encap_stack "_tunnel_hw_if_indices
+ [vec_len (ngm->free_" encap_stack "_tunnel_hw_if_indices)-1];
+ _vec_len (ngm->free_" encap_stack "_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, " encap_stack "_device_class.index, t - ngm->tunnels,
+ " encap_stack "_hw_class.index, t - ngm->tunnels);
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ hi->output_node_index = " encap_stack "_encap_node.index;
+ }
+
+ t->hw_if_index = hw_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->hw_if_index, 0 /* down */);
+ vec_add1 (ngm->free_" encap_stack "_tunnel_hw_if_indices, t->hw_if_index);
+
+ hp = hash_get_pair (ngm->" encap_stack "_tunnel_by_key, &key);
+ key_copy = (void *)(hp->key);
+ hash_unset_mem (ngm->" encap_stack "_tunnel_by_key, &key);
+ clib_mem_free (key_copy);
+
+ vec_free (t->rewrite);
+ pool_put (ngm->tunnels, t);
+ }
+
+ if (hw_if_indexp)
+ *hw_if_indexp = hw_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 = " ENCAP_STACK "_INPUT_NEXT_DROP;
+ else if (unformat (input, \"ip4\"))
+ *result = " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT;
+ else if (unformat (input, \"ip6\"))
+ *result = " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, \"ethernet\"))
+ *result = " ENCAP_STACK "_INPUT_NEXT_IP6_INPUT;
+ else if (unformat (input, \"" encap-stack "\"))
+ *result = " ENCAP_STACK "_INPUT_NEXT_" ENCAP_STACK "_ENCAP;
+ else if (unformat (input, \"%d\", &tmp))
+ *result = tmp;
+ else
+ return 0;
+ return 1;
+}
+
+static clib_error_t *
+" encap_stack "_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;
+ clib_error_t *error = 0;
+ 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 = " ENCAP_STACK "_NEXT_PROTOCOL_IP4;
+ u32 decap_next_index = " ENCAP_STACK "_INPUT_NEXT_IP4_INPUT;
+ u8 flags = " ENCAP_STACK "_FLAGS_P;
+ u8 ver_res = 0;
+ u8 res = 0;
+ u32 iid = 0;
+ u8 iid_set = 0;
+ u32 tmp;
+ int rv;
+ vnet_" encap_stack "_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)
+ {
+ unformat_free (line_input);
+ 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)
+ {
+ unformat_free (line_input);
+ 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 " ENCAP_STACK " header
+ */
+ else
+ {
+ error = clib_error_return (0, \"parse error: '%U'\",
+ format_unformat_error, line_input);
+ unformat_free (line_input);
+ return error;
+ }
+ }
+
+ 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\");
+
+ memset (a, 0, sizeof (*a));
+
+ a->is_add = is_add;
+
+#define _(x) a->x = x;
+ foreach_copy_field;
+#undef _
+
+ rv = vnet_" encap_stack "_add_del_tunnel (a, 0 /* hw_if_indexp */);
+
+ switch(rv)
+ {
+ case 0:
+ break;
+ case VNET_API_ERROR_INVALID_VALUE:
+ 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_" encap_stack "_add_del_tunnel returned %d\", rv);
+ }
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (create_" encap_stack "_tunnel_command, static) = {
+ .path = \"lisp gpe tunnel\",
+ .short_help =
+ \"<mumble> tunnel src <ip4-addr> dst <ip4-addr>\\n\"
+ \" [encap-fib-id <nn>] [decap-fib-id <nn>]\\n\"
+ \" [decap-next [ip4|ip6|ethernet|nsh-encap|<nn>]][del]\\n\",
+ .function = " encap_stack "_add_del_tunnel_command_fn,
+};
+
+static clib_error_t *
+show_" encap_stack "_tunnel_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ " encap_stack "_main_t * ngm = &" encap_stack "_main;
+ " encap_stack "_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_" encap_stack "_tunnel);
+ }));
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (show_" encap_stack "_tunnel_command, static) = {
+ .path = \"show lisp gpe tunnel\",
+ .function = show_" encap_stack "_tunnel_command_fn,
+};
+
+clib_error_t *" encap_stack "_init (vlib_main_t *vm)
+{
+ " encap_stack "_main_t *ngm = &" encap_stack "_main;
+
+ ngm->vnet_main = vnet_get_main();
+ ngm->vlib_main = vm;
+
+ ngm->" encap_stack "_tunnel_by_key
+ = hash_create_mem (0, sizeof(" encap_stack "_tunnel_key_t), sizeof (uword));
+
+ /* YMMV, register with the local netstack */
+ udp_register_dst_port (vm, UDP_DST_PORT_" encap_stack ",
+ " encap_stack "_input_node.index, 1 /* is_ip4 */);
+ return 0;
+}
+
+VLIB_INIT_FUNCTION(" encap_stack "_init);
+
+")
+
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