From 757585db71b78c4edf91ba011be419264de43d1a Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Thu, 20 Apr 2017 11:42:28 +0200 Subject: Move emacs stuff to extras/ Change-Id: Ibbb7d8500e9064215cf912bd00bdf72a748f8a27 Signed-off-by: Damjan Marion --- extras/emacs/tunnel-c-skel.el | 452 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 452 insertions(+) create mode 100644 extras/emacs/tunnel-c-skel.el (limited to 'extras/emacs/tunnel-c-skel.el') diff --git a/extras/emacs/tunnel-c-skel.el b/extras/emacs/tunnel-c-skel.el new file mode 100644 index 00000000..a1b1757d --- /dev/null +++ b/extras/emacs/tunnel-c-skel.el @@ -0,0 +1,452 @@ +;;; 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 + +" 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 "); + + /* $$$ build a tunnel header here */ + + t->rewrite = rw; + return (0); +} + +int vnet_" encap_stack "_add_del_tunnel +(vnet_" encap_stack "_add_del_tunnel_args_t *a, u32 * hw_if_indexp) +{ + " encap_stack "_main_t * ngm = &" encap_stack "_main; + " encap_stack "_tunnel_t *t = 0; + vnet_main_t * vnm = ngm->vnet_main; + vnet_hw_interface_t * hi; + uword * p; + u32 hw_if_index = ~0; + int rv; + " encap_stack "_tunnel_key_t key, *key_copy; + hash_pair_t *hp; + + key.FIXME = clib_host_to_net_XXX(FIXME); + + p = hash_get_mem (ngm->" encap_stack "_tunnel_by_key, &key); + + if (a->is_add) + { + /* adding a tunnel: tunnel must not already exist */ + if (p) + return VNET_API_ERROR_INVALID_VALUE; + + pool_get_aligned (ngm->tunnels, t, CLIB_CACHE_LINE_BYTES); + memset (t, 0, sizeof (*t)); + + /* copy from arg structure */ +#define _(x) t->x = a->x; + foreach_copy_field; +#undef _ + + rv = " encap_stack "_rewrite (t); + + if (rv) + { + pool_put (ngm->tunnels, t); + return rv; + } + + /* $$$$ 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 = + \" tunnel src dst \\n\" + \" [encap-fib-id ] [decap-fib-id ]\\n\" + \" [decap-next [ip4|ip6|ethernet|nsh-encap|]][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); + +") + -- cgit 1.2.3-korg